Liebert Power Supply Series 600T Users Manual

SERIES 600T to the manual 1bd1e5a6-9acd-469c-a9a2-37f710e581e7

2015-02-09

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POWER PROTECTION

Series 600T™ UPS

Multi-Module Three Phase

65 kVA to 750 kVA; 60 Hz

Operation & Maintenance

Manual

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TABLE OF CONTENTS

1.0 INTRODUCTION

1.1 System Description . . . ..............................................................3

1.2 Reliability . .......................................................................7

1.3 Safety Precautions ..................................................................8

1.4 Modes of Operation. . . ..............................................................9

1.4.1 Normal(LoadonUPS)...............................................................9

1.4.2 InputPowerFailure..................................................................9

1.4.3 Recharge..........................................................................9

1.4.4 Overload ..........................................................................9

1.4.5 Redundant . . . ......................................................................9

1.4.6 Bypass(Internal)....................................................................9

1.4.7 MaintenanceBypass.................................................................9

1.4.8 Off-Battery ........................................................................9

1.5 Operator Controls .................................................................10

1.6 Options..........................................................................12

2.0 THEORY OF OPERATION

2.1 General Component Descriptions . ....................................................13

2.2 Detailed Component Descriptions. ....................................................15

2.2.1 Controls..........................................................................15

2.2.2 Rectifier/Charger...................................................................16

2.2.3 BatteryChargingCircuit.............................................................17

2.2.4 Inverter ..........................................................................18

2.2.5 StaticBypass......................................................................19

2.2.6 Redundant Mode ...................................................................22

3.0 OPERATION

3.1 DisplayScreenandOperatorControls .................................................23

3.1.1 MasterMenuScreen................................................................29

3.1.2 Monitor/MimicDisplayScreen........................................................31

3.1.3 Walk-InDisplayScreen..............................................................40

3.1.4 StatusReportsScreens ..............................................................41

3.1.5 SystemConfigurationScreens ........................................................48

3.1.6 AlarmLimitSettingsScreen..........................................................55

3.1.7 LoadTransferProceduresScreen......................................................57

3.1.8 Start-UpProceduresScreen...........................................................58

3.1.9 ShutdownProceduresScreen .........................................................60

3.1.10 Battery Time Screen (Module Only)....................................................62

3.1.11 MeterCalibrationScreen ............................................................65

3.1.12 BatteryEqualizeScreen .............................................................66

3.1.13 AlarmandStatusMessages...........................................................67

3.1.14 CommunicationInterfaces ...........................................................75

3.2 Modes of Operation. . . .............................................................78

3.2.1 LoadOnBypass ...................................................................78

3.2.2 OKToTransfer....................................................................79

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3.2.3 MomentaryOverloads ..............................................................81

3.2.4 InputPowerFailure(LoadOnBattery).................................................82

3.2.5 OneModuleOff-Line...............................................................83

3.2.6 OffBattery.......................................................................84

3.2.7 Emergency Modules Off . ...........................................................85

3.2.8 EmergencyPowerOff ..............................................................86

3.2.9 SystemShutdown..................................................................87

3.2.10 MaintenanceBypass................................................................88

3.3 ManualProcedures................................................................ 90

3.3.1 Start-UpProcedure.................................................................91

3.3.2 LoadTransferProcedures............................................................97

3.3.3 ShutdownProcedures...............................................................99

3.4 Automatic Operations ............................................................ 103

3.4.1 Overloads(WithoutTransfer)........................................................103

3.4.2 AutomaticTransferstoBypass.......................................................104

3.4.3 AutomaticRetransferstoUPS.......................................................104

3.4.4 Automatic Module Off-Line.........................................................105

3.4.5 Automatic Emergency Modules Off...................................................105

4.0 MAINTENANCE

4.1 Safety Precautions ............................................................... 106

4.2 LiebertCustomerServiceandSupport ............................................... 108

4.3 Routine Maintenance ............................................................. 109

4.3.1 RecordLog......................................................................109

4.3.2 AirFilters.......................................................................109

4.3.3 BatteryMaintenance ..............................................................110

4.3.4 TorqueRequirements..............................................................115

4.4 Detection of Trouble ............................................................. 115

4.5 ReportingaProblem ............................................................. 116

4.6 Corrective Actions ............................................................... 116

4.7 Recommended Test Equipment ..................................................... 116

5.0 SPECIFICATIONS AND RATINGS

5.1 Rating......................................................................... 117

5.2 Environmental Conditions ........................................................ 118

5.3 Adjustments . . . ................................................................. 119

5.4 BatteryOperation................................................................ 119

5.5 ElectricalSpecifications .......................................................... 120

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iii

FIGURES

Figure 1 Multi-Module UPS, 65-80 kVA (left) and 100-500 kVA (right) ...................................3

Figure 2 Multi-Module 500-750 kVA UPS ..........................................................5

Figure3 SystemControlCabinets(SCCs) ..........................................................6

Figure4 SCCControlsandDisplayScreenwithExampleoftheMonitor/MimicScreen .....................10

Figure5 ModuleControlsandDisplayScreenwithExampleoftheMonitor/MimicScreen...................11

Figure6 UPSModuleBlockDiagram.............................................................14

Figure7 SystemControlCabinet(SCC)BlockDiagram ..............................................19

Figure8 OperatorControls,65to80kVA(left)and100to500kVA(right) ...............................24

Figure9 SystemControlCabinetOperatorControls(SCCBPictured) ...................................25

Figure10 Series600TUPSandSCCOperatorControlPanels ..........................................26

Figure11 SwitchesBehindSCCControlPanelDoor ..................................................27

Figure12 MenuTree ...........................................................................28

Figure 13 Master Menu Screens, SCC (above) and Module (below).......................................29

Figure14 SCCMonitor/MimicDisplayScreen ......................................................31

Figure15 ModuleMonitor/MimicDisplayScreen ....................................................33

Figure16 Monitor/MimicDisplayScreenExamples:NormalPowerFlowe.................................35

Figure17 Monitor/MimicDisplayScreenExamples:UtilityFail.........................................36

Figure 18 Monitor/Mimic Display Screen Examples: Load on Bypass, UPS Modules On and Charging Battery . . . .37

Figure 19 Monitor/Mimic Display Screen Examples: Load on UPS, One UPS Module Off Line ................38

Figure 20 Monitor/Mimic Display Screen Examples: Load on Bypass, All UPS Modules Off Line . . . . . . . . . . . . . .39

Figure21 Walk-InDisplayScreenDuringStart-Up ...................................................40

Figure22 StatusReportsScreen ..................................................................41

Figure23 PresentStatusReportScreens ............................................................42

Figure24 EventHistoryReportScreen .............................................................43

Figure25 HistoryStatusReportScreens ............................................................44

Figure26 BatteryCycleMonitorScreen ............................................................46

Figure27 BatteryCycleMonitoringSummaryScreen .................................................47

Figure28 TypicalDataonDischargeCyclesof91to240SecondsDuration................................47

Figure29 SCCSystemConfigurationScreen ........................................................48

Figure30 DateScreen ..........................................................................49

Figure31 TimeScreen ..........................................................................50

Figure32 AutoDialSettingScreen ................................................................51

Figure33 ModemBaudRate.....................................................................52

Figure34 MaximumAuto-RetransferAttemptsScreen ................................................53

Figure35 ModuleAlarmLimitSettingsScreen ......................................................55

Figure36 LoadTransferProceduresScreen .........................................................57

Figure37 SCCStart-UpProceduresScreen .........................................................58

Figure38 ModuleStart-UpProceduresScreen ......................................................59

Figure39 SCCShutdownProceduresScreen ........................................................60

Figure40 ModuleShutdownProceduresScreen......................................................61

Figure41 BatteryTimeScreenExample-15MinuteDischarge .........................................62

Figure42 BatteryTimeScreenExample-45MinuteDischarge .........................................63

Figure43 RangeofValuesforCalculatedBatteryTimes ...............................................64

Figure44 MeterCalibrationScreen................................................................65

Figure45 BatteryEqualizeScreen ................................................................66

Figure46 SCCStatusandAlarmMessageAreas .....................................................67

Figure47 LoadonBypass(UPSNotAvailable) ......................................................78

Figure48 LoadonBypass(UPSAvailable) .........................................................79

Figure49 LoadonUPS(BypassAvailable) .........................................................80

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Figure50 MomentaryOverload(PulsedStaticBypassSwitch)..........................................81

Figure51 InputPowerFail(LoadonBattery) .......................................................82

Figure52 OneModuleOff-Line(LoadonUPS) .....................................................83

Figure53 LoadonUPS(BatteryNotAvailable) .....................................................84

Figure 54 Emergency Modules Off ................................................................85

Figure55 EmergencyPowerOff .................................................................86

Figure56 SystemShutdown .....................................................................87

Figure57 LoadonMaintenanceBypass(TwoBreakers)...............................................88

Figure58 LoadonMaintenanceBypass(ThreeBreakers)..............................................89

Figure59 SCCStart-UpProceduresScreen .........................................................93

Figure60 ModuleStart-UpProceduresScreen ......................................................95

Figure61 LoadTransferProceduresScreen .........................................................97

Figure62 SCCShutdownProceduresScreen........................................................99

Figure63 ModuleShutdownProceduresScreen ....................................................101

Figure64 Current-Versus-TimeCurveofModuleOverloadCapacity....................................103

TABLES

Table1 AlarmMessages-MeaningandCorrectiveAction ...........................................70

Table2 AlarmMessages-Summary.............................................................74

Table3 Series600TTerminalCommands.........................................................77

Table4 TorqueSpecifications(UnlessOtherwiseLabeled) ..........................................115

Table5 RecommendedTestEquipmentandTools..................................................116

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IMPORTANT SAFETY INSTRUCTIONS

Save These Instructions.

This manual contains important instructions that should be followed during installation and maintenance of your

Series 600T UPS and batteries.

WARNING

EXERCISE EXTREME CARE WHEN HANDLING UPS CABINETS TO

AVOID EQUIPMENT DAMAGE OR INJURY TO PERSONNEL. REFER TO

SEPARATE INSTALLATION MANUAL FOR EQUIPMENT HANDLING

INFORMATION AND INSTALLATION PROCEDURES.

FOLLOW ALL BATTERY SAFETY PRECAUTIONS IN 4.0 -

MAINTENANCE WHEN INSTALLING, CHARGING, OR SERVICING

BATTERIES. IN ADDITION TO THE HAZARD OF ELECTRIC SHOCK,

GAS PRODUCED BY BATTERIES CAN BE EXPLOSIVE AND SULFURIC

ACID CAN CAUSE SEVERE BURNS.

IN CASE OF FIRE INVOLVING ELECTRICAL EQUIPMENT, USE ONLY

CARBON DIOXIDE FIRE EXTINGUISHERS, OR OTHERS APPROVED

FOR USE IN ELECTRICAL FIRE FIGHTING.

EXTREME CAUTION IS REQUIRED WHEN PERFORMING

MAINTENANCE.

BE CONSTANTLY AWARE THAT THE UPS SYSTEM CONTAINS HIGH

DC AS WELL AS AC VOLTAGES. WITH INPUT POWER OFF AND THE

BATTERY DISCONNECTED, HIGH VOLTAGE AT FILTER CAPACITORS

AND POWER CIRCUITS SHOULD BE DISCHARGED WITHIN 30

SECONDS. HOWEVER, IF A POWER CIRCUIT FAILURE HAS

OCCURRED, YOU SHOULD ASSUME THAT HIGH VOLTAGE MAY

STILL EXIST AFTER SHUTDOWN. CHECK WITH A VOLTMETER

BEFORE MAKING CONTACT.

AC VOLTAGE WILL REMAIN ON THE SYSTEM BYPASS (SBB) AND UPS

OUTPUT CIRCUIT BREAKERS, AND THE STATIC BYPASS SWITCH,

UNLESS ASSOCIATED EXTERNAL CIRCUIT BREAKERS ARE OPENED.

CHECK FOR VOLTAGE WITH BOTH AC AND DC VOLTMETERS PRIOR

TO MAKING CONTACT.

WHEN THE UPS SYSTEM IS UNDER POWER, BOTH THE OPERATOR

AND ANY TEST EQUIPMENT MUST BE ISOLATED FROM DIRECT

CONTACT WITH EARTH GROUND AND THE UPS CHASSIS FRAME BY

USING RUBBER MATS.

SOME COMPONENTS WITHIN THE CABINETS ARE NOT CONNECTED

TO CHASSIS GROUND. ANY CONTACT BETWEEN FLOATING

CIRCUITS AND THE CHASSIS IS A LETHAL SHOCK HAZARD.

EXERCISE CAUTION THAT THE TEST INSTRUMENT EXTERIOR DOES

NOT MAKE CONTACT EITHER PHYSICALLY OR ELECTRICALLY

WITH EARTH GROUND.

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OVERVIEW OF THIS MANUAL

The manual is organized so that information can be found quickly. Each major topic is separated by sections, and

the Table of Contents contains major headings within each section. The names of the sections and their contents

are described below.

1.0 - Introduction is a summary of the Series 600T UPS System. It describes some of the unique features and

benefits of the Series 600T, as well as the design principles and standards that Liebert follows in the manufacture

of each system. Descriptions of the Series 600T system and an overview of its functions are also included.

2.0 - Theory of Operation is an explanation of the major circuit groups of the Series 600T UPS. This section is

for individuals who want to know both the basics and the specifics of each major component. The text explains

how the UPS handles electrical disturbances and interruptions.

3.0 - Operation is written for facility personnel responsible for the operation of the system. It details the proce-

dures required to start-up each module and the system, to transfer the load between the available sources, and to

shut down each module and the system. Both manual and automatic operations are described. Operator controls

and displays, including the solid state liquid crystal display (LCD) screen, are illustrated and explained for the

UPS Module and for the System Control Cabinet (SCC).

4.0 - Maintenance lists routine maintenance checks and helps the user pinpoint and quickly resolve problems if

they arise.

5.0 - Specifications and Ratings gives detailed specifications about the Series 600T UPS System. This technical

information is of use to installing contractors, engineers, and service personnel.

If you require assistance for any reason, call the toll-free Liebert Global Services number: 1-800-543-2378. For

LGS to assist you expediently, please have the following information available:

Part Numbers: ______________________________________________________________

Serial Numbers: ______________________________________________________________

kVA Rating: ______________________________________________________________

Date Purchased: ______________________________________________________________

Date Installed: ______________________________________________________________

Location: ______________________________________________________________

Input Voltage: ______________________________________________________________

Output Voltage: ______________________________________________________________

Battery Reserve Time: ______________________________________________________________

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Introduction 3

1.0 INTRODUCTION

1.1 System Description

The role of the parallel-redundant multi-module UPS system is to supply uninterruptible, clean power to the crit-

ical load. It maintains a full-voltage, low-distortion output, even if the utility source power sags or becomes dis-

torted.

If there is an outage of the source power, the UPS maintains power to the load until an alternate source of power

is activated, or until the original power source is restored. If input AC power is not restored, the UPS maintains

the load (with the battery plant) long enough that the critical equipment can be shut down in an orderly manner.

The Series 600T UPS module displays the rate of battery discharge and calculates the amount of battery time

remaining based on the actual connected load. The time that the battery will maintain the load depends on the

capacity of the battery backup plant and the size of the load.

The system control logic automatically manages critical bus operation. System logic is resident in Application

Specific Integrated Circuits (ASICs) for precise control and improved reliability.

If the critical load current exceeds the rated load of the Series 600T UPS system, the control logic determines the

magnitude of the overload and reacts appropriately. Overloads are usually the result of inrush current require-

ments. The UPS system supports loads that are 150% of the rated load for up to 30 seconds and 125% of the

rated load for up to ten minutes. If the system is operating in the non-redundant mode (e.g., a UPS module is off

line), the overload limits are automatically adjusted.

Figure 1 Multi-Module UPS, 65-80 kVA (left) and 100-500 kVA (right)

If the load surpasses the overload capacity of the UPS, the load is automatically transferred to bypass without

interruption. When the load returns to within the UPS rating, it is either automatically or manually returned

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4 Introduction

(retransferred) to the UPS. How and when the load is returned to the UPS depends on several factors: how long

the overload lasted, how many overload conditions occurred before transfer, whether there is an imminent failure

of any part of the UPS, etc. Refer to 3.4 - Automatic Operations.

In the unlikely event of a fault within the UPS, the SCC control logic, which continuously monitors all critical

circuits within the UPS system, transfers the load to bypass without interruption and simultaneously sets off local

and remote alarms. If a fault is detected in an individual UPS module, that module is automatically disconnected

from the critical bus and shut down. A Module Off Line status message will appear at the SCC display. The

module can be manually returned to service when the fault has been corrected.

If the multi-module UPS system is operating in the redundant mode (at least one extra module is available for the

connected critical load), the load will remain on the UPS system if one individual module is disconnected from

the critical bus (off line). If the UPS system is operating in the non-redundant mode, the load will be automati-

cally transferred to bypass if a module goes off line.

The Series 600T UPS display system provides precise monitoring of the UPS, fast alarm response, and quick

troubleshooting. For easy manual operations, menu-driven software provides access to several step-by-step help

screens. All operator functions are performed using menu-prompted displays and a minimum number of operator

controls. The System Control Cabinet includes external communication capability with both automatic dial-out

and dial-in features for early warning and diagnosis of abnormal conditions.

The system software allows the operator, or Liebert Global Services, to enter application specific information.

Overload, overvoltage, battery discharge, and shutdown limits can be set by the operator. In effect, the software

is tailored for each site.

The UPS system protects critical equipment from source power disturbances and outages, load faults, and UPS

malfunctions. This triple protection virtually eliminates computer and computing equipment downtime as a

result of utility source power problems.

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Introduction 5

Figure 2 Multi-Module 500-750 kVA UPS

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6 Introduction

Figure 3 System Control Cabinets (SCCs)

Types of System Control Cabinets (SCCs)

•SCCT -- A stand-alone cabinet containing system control logic for up to six UPS modules, a static bypass

switch, manually operated disconnects for the static bypass switch, and two motor-operated system circuit

breakers.

•SCCB -- Similar to the SCCT, except that external sheet metal matches that of the UPS modules.

•SCCP -- Similar to the SCCB, except narrower and designed for two UPS modules.

•SCCI -- System control logic and static bypass switch are integrated into a switchboard cabinet manufac-

tured by others, which also includes the system circuit breakers.

•SCCC -- An integrated configuration like the SCCI, but with a static switch rated for continuous duty.

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Introduction 7

1.2 Reliability

Reliability is the most important design goal for Uninterruptible Power Systems. Liebert Series 600 UPS systems

have demonstrated reliability by achieving a field-proven critical bus MTBF in excess of one million hours. In

addition, our Quality Assurance program is certified to the requirements of ISO 9001 standards.

Liebert Large UPS systems are ETL listed to the requirements of UL 1778. All equipment and components are

manufactured to applicable UL, NEC, NEMA, ANSI, IEEE, and CSA standards and guidelines.

Designed for Success

The keys to reliability in the design of the UPS system are using conservatively rated components, minimizing

transfers to bypass, making operator controls understandable, and providing easy access for maintenance and

repair. Liebert UPS systems lead the industry in all these areas.

For example, the Series 600T can clear substantial overloads through the solid state static bypass switch without

transferring to the bypass source. By minimizing transfers to bypass, the Series 600T minimizes operation of cir-

cuit breakers and enhances system reliability.

As another example, the system control logic has been packaged into Application-Specific Integrated Circuits

(ASICs) to eliminate the failure-prone discrete logic boards used in other brands of UPS products. Furthermore,

these ASICs are isolated from heat-generating components to ensure optimal operating temperatures.

Other Factors to Consider

Reliability depends on more than just UPS module design. Improper installation can cause any system to fail. To

prevent this, Customer Engineers from Liebert Global Services thoroughly inspect the installation of all our sys-

tems to ensure they are installed properly and operating within performance specifications.

Once a UPS is properly installed, you—the on-site equipment operator—are the most important factor in pre-

venting critical bus failures or unplanned transfers to bypass. To make your task easier, the Series 600T UPS pro-

vides easy-to-follow, prompted instructions on the industry’s largest operator display screen.

If you ever need help, call Liebert Global Services (24 hours a day at 1-800-543-2378). Your attention to proper

installation, operation, and periodic maintenance will ensure that your mission-critical operations receive the

best possible protection from electrical disturbances and outages.

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8 Introduction

1.3 Safety Precautions

Read this manual thoroughly, paying special attention to the sections that apply to you, before working with the

UPS. Also read the battery manufacturer’s manual before working on or near the battery.

Under typical operation and with all UPS doors closed, only normal safety precautions are necessary. The area

around the UPS system and Battery should be kept free from puddles of water, excess moisture, or debris.

Special safety precautions are required for procedures involving handling, installation, and maintenance of the

UPS system or the battery. Observe precautions in the separate Installation Manual before handling or installing

the UPS system. Observe precautions in 4.0 - Maintenance, before as well as during performance of all mainte-

nance procedures. Observe all battery safety precautions in 4.0 - Maintenance before working on or near the

battery.

This equipment contains several circuits that are energized with high voltage. Only test equipment desig-

nated for troubleshooting should be used. This is particularly true for oscilloscopes. Always check with an AC

and DC voltmeter to ensure safety before making contact or using tools. Even when the power is turned Off, dan-

gerously high potentials may exist at the capacitor banks. Observe all battery precautions when near the battery

for any reason.

ONLY qualified service personnel should perform maintenance on the UPS system. When performing

maintenance with any part of the equipment under power, service personnel and test equipment should be stand-

ing on rubber mats. The service personnel should wear insulating shoes for isolation from direct contact with the

floor (earth ground).

Unless all power is removed from the equipment, one person should never work alone. A second person should

be standing by to assist and summon help in case an accident should occur. This is particularly true when work is

performed on the battery.

Three types of messages are used throughout the manual to stress important text. Carefully read the text below

each Warning, Caution, and Note and use professional skills and prudent care when performing the actions

described by that text.

AWarning signals the presence of a possible serious, life-threatening condition. For example:

ACaution indicates a condition that could seriously damage equipment and possibly injure personnel. For

example:

ANote emphasizes important text. If the note is not followed, equipment could be damaged or may not operate

properly. For example:

WARNING

LETHAL VOLTAGES MAY BE PRESENT WITHIN THIS UNIT EVEN

WHEN IT IS APPARENTLY NOT OPERATING. OBSERVE ALL

CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE TO DO SO

COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT WORK ON

OR OPERATE THIS EQUIPMENT UNLESS YOU ARE FULLY QUALIFIED

TO DO SO!! NEVER WORK ALONE.

CAUTION

Make sure you understand the proper sequence before operating any circuit

breaker. Operating a Maintenance Bypass circuit breaker out of sequence could

cut off power to the critical load.

NOTE

If the UPS system has a blown fuse, the cause should be determined before you

replace the fuse. Contact Liebert Global Services.

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Introduction 9

1.4 Modes of Operation

Refer to 2.0 - Theory of Operation and 3.0 - Operation for more details.

1.4.1 Normal (Load on UPS)

The utility AC source provides power to the rectifier/charger in each UPS module. Each rectifier/charger con-

verts the utility AC power to DC and supplies DC power to the UPS module inverter while simultaneously float

charging the battery plant. Each UPS module inverter converts DC to AC and furnishes AC power to the critical

bus. The System Control Cabinet (SCC) is the tie point for the paralleled modules and monitors and controls the

critical bus performance.

1.4.2 Input Power Failure

If the utility source power fails or is outside the acceptable range, the battery plant becomes the primary supplier

of DC power to the inverter.

1.4.3 Recharge

After the utility source power is restored, or an alternate power source becomes available, each rectifier/charger

slowly walks-in to once again power the inverters and recharge the battery plant.

1.4.4 Overload

Overloads in critical systems may be caused by inrush currents during connected equipment start-up or by faults

in the critical load. The Liebert Series 600T UPS system can maintain full output voltage regulation while sus-

taining the following overloads:

• Up to 150% for 30 seconds

• Up to 125% for 10 minutes

• Up to 104% for an indefinite period of time

Also, for clearing momentary faults above 155% of rated SCC current, the static switch turns on for 40 millisec-

onds to supply power from the bypass source. Up to 1000% of the rated current can be supplied for less than one

cycle, while up to 500% of rated load can be sustained for the full 40 milliseconds of pulsed-parallel operation.

The critical load remains on the UPS modules for the above conditions. If the UPS system overload capacity is

exceeded, an automatic transfer to bypass is initiated, which closes the system bypass circuit breaker (SBB) and

opens the UPS output circuit breaker.

Whenever you have an overload condition, you should determine the cause of the overload.

1.4.5 Redundant

If the multi-module UPS system includes one more module than the number required to supply the critical load,

the UPS system can operate in the redundant mode. This means that the load will remain on the UPS system if

one of the modules is disconnected because of an overload, an internal fault, or for maintenance. If the additional

module is not included in the system design, or if the additional module is disconnected from the critical bus, the

UPS system operates in the non-redundant mode.

1.4.6 Bypass (Internal)

The SCC control logic initiates an automatic transfer to the bypass source if the overload-current-versus-time

curve is exceeded or if specified UPS system faults occur. You can also manually transfer the load to the bypass

(without interruption) if you must take the UPS module out of service for maintenance.

The SCC internal maintenance bypass will allow most key components and operating modes to be checked with-

out disturbing the critical bus. However, certain key power-carrying components, such as the output and bypass

circuit breakers, will require complete system shutdown or isolation through an external maintenance bypass

cabinet for 100% service.

1.4.7 Maintenance Bypass

The installation of a Maintenance Bypass Cabinet, Panelboard or Switchboard is recommended to allow you to

totally isolate the UPS from all power sources. Use of the Maintenance Bypass is described in 3.0 - Operation.

1.4.8 Off-Battery

The battery plant can be disconnected from the rectifier/charger by using an external Module Battery Disconnect

(MBD circuit breaker). The UPS module continues to function normally, though it does not have power outage

back-up capability until the battery plant is reconnected.

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10 Introduction

1.5 Operator Controls

The Liebert Series 600T UPS System Control Cabinet (SCC) and each individual module are equipped with a

microprocessor-based Operator Display Screen and Control Panel designed for convenient and reliable opera-

tion.

The front panel location of the monitoring and control system enables the user to quickly identify the current sta-

tus of the UPS and to perform most of the manual operations. The operator display screen is driven by an easy-

to-follow menu-prompted software program that controls and monitors the UPS system.

Figure 4 SCC Controls and Display Screen with Example of the Monitor/Mimic Screen

The operator controls and Monitor/Mimic screen for the System Control Cabinet (SCC) are shown in Figure 4.

The controls and display screen for each UPS module are shown in Figure 5. Each cabinet (SCC or module) has

the displays and controls required to monitor and perform its functions.

Figure 4 shows a three-module system designed for redundant operation. A multi-module UPS system may

include up to six (6) modules for each SCC.

Detailed instructions on how to interpret the displays and use the controls are in 3.0 - Operation.

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Introduction 11

Figure 5 Module Controls and Display Screen with Example of the Monitor/Mimic Screen

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12 Introduction

1.6 Options

A number of standard pre-designed options are available from Liebert for your UPS system. Described below are

the most frequently provided options. Note that the battery items (1-3) are required to complete the UPS system.

The remaining options provide improved system performance or convenience.

1. Battery

The batteries provide power in the event of a power outage. The Liebert UPS can use a variety of battery

types, provided the battery plant is designed for the UPS DC voltage range and the load requirements of

your application.

2. Battery Racks or Cabinets

The battery racks are specifically designed for stationary service batteries. They are painted with electrolyte-

resistant paint for corrosion resistance. Battery cabinets are available for 150 through 600 kVA modules.

3. Module Battery Disconnect

The UPS system utilizes a separate Module Battery Disconnect for remotely located batteries. A sensing cir-

cuit in the UPS module, set at the battery low voltage limit, trips the Module Battery Disconnect to safe-

guard the battery from excessive discharge. The Module Battery Disconnect has an undervoltage release

mechanism designed to ensure that during any shutdown or failure mode all battery potential is removed

from the UPS system

4. Input Distortion Filter

This filter reduces rectifier input current reflected harmonic distortion to less than 7% THD, and less than

4% THD for modules with the optional 12-pulse rectifier. The filter is factory installed within the UPS. This

filter also improves the input power factor to better than 0.92 lagging.

5. 12-Pulse Rectifier

Certain models may be ordered with the optional 12-pulse rectifier section. This provides input isolation and

reduces reflected input current THD to less than 9%, or less than 4% with optional input filter.

6. Isolation Transformers

An optional rectifier input isolation transformer is available in a matching transformer cabinet. A bypass iso-

lation transformer is also available.

7. Three Breaker Maintenance Bypass

This switchboard provides make-before-break maintenance bypass. It includes: UPS Bypass Input Breaker

(BIB), Maintenance Bypass Breaker (MBB), and Maintenance Isolation Breaker (MIB).

8. Two Breaker Maintenance Bypass

This switchboard provides make-before-break maintenance bypass. It includes: Maintenance Bypass

Breaker (MBB) and Maintenance Isolation Breaker (MIB).

9. Load Bus Synchronization (LBS)

The Load Bus Sync (LBS) option keeps two independent UPS systems (and therefore their critical load

buses) in sync, even when the modules are operating on batteries or asynchronous AC sources. This means

that critical loads connected to both load buses through a Static Bus Transfer Switch can be switched seam-

lessly between the two.

10. SiteScan Central Monitoring System

Liebert manufactures a central monitoring system that automatically displays key UPS measurements and

alarms, as well as data from a variety of sensors. This monitoring system signals alarms so corrective action

can be taken. Events and data can be printed in hard copy. Data can be logged for analysis.

11. Remote Monitor Panel

The UPS system may also be provided with an optional Remote Monitor Panel. This Panel provides eight

LED indicators and may be placed at a convenient location near the critical load. A functional description of

the Remote Monitor Panel is provided in 3.0 - Operation of this manual.

12. Customer Alarm Interface

This optional interface board allows the input and display of 8 alarms from customer-supplied contacts, each

with a customer-selected name of up to 16 characters. The following attributes can be user programmed for

each alarm: latching, summary, freeze history, sound horn, auto-dial, and time delay (0 to 999.9 seconds).

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Theory of Operation 13

2.0 THEORY OF OPERATION

2.1 General Component Descriptions

The UPS system includes all of the equipment necessary to continuously provide computer-grade AC power to a

critical load, even when there is an interruption of the utility line power. It consists of a System Control Cabinet

(SCC), UPS modules, and a back-up battery plant. Refer to Figure 6 and Figure 7. Except where otherwise

noted, the configuration is presumed to be parallel-redundant (with at least one more UPS module than required

to support the rated load).

System Control Cabinet

The System Control Cabinet (SCC) includes system controls, static bypass switch, load transfer control, protec-

tive devices, and other accessories. The system controls simultaneously monitor two or more parallel UPS mod-

ules sharing a critical load for increased capacity and/or redundancy. The two (2) motor-operated system circuit

breakers (system bypass breaker—SBB and UPS output breaker) may be contained within the SCC, depending

on the configuration designed for your installation.

System Controls: The system control logic automatically manages critical bus operation and monitors perfor-

mance of the UPS modules. Microprocessor technology and dedicated firmware provide advanced logic control

and a comprehensive display of information. The system control logic synchronizes the output of the UPS sys-

tem to the bypass source. The SCC includes ports for communicating with external devices. Liebert Multi-Mod-

ule Units do not require an SCC for load sharing. Automatic, parallel module load sharing is a function built into

the modules themselves; however interconnection through the SCC enables the modules to share data for more

precise control. Modules do not require master clocks or controls in order to load share or free-run at 60.0 Hz.

Static Bypass Switch: The static (solid-state) bypass switch immediately transfers the load from the inverter to

the bypass AC power source in the event of a severe overload on the system or a failure within the UPS. This

transfer takes place without any interruption of the power supplied to the load. The system includes redundant

circuits to detect and isolate shorted SCRs in the static switch.

Fuses are installed in series with the static bypass circuit to ensure reliable overload protection in the unlikely

event of a catastrophic output condition (e.g., a dropped wrench) electrically close to the output of your UPS sys-

tem. The static switch SCRs themselves are rated to easily handle the fuse-blowing current.

Bypass Circuit: The bypass circuit consists of electrically operated circuit breakers and associated synchroniz-

ing and control circuitry to transfer the load to/from the bypass source.

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14 Theory of Operation

Figure 6 UPS Module Block Diagram

UPS Module

The UPS module consists of module controls, a rectifier/charger, an inverter, protective devices, and other acces-

sories.

Module Controls: The module control logic monitors performance of the UPS module. The UPS module status

is displayed locally and is also sent to the System Control Cabinet.

Rectifier/Charger: The rectifier/charger converts utility power from AC to DC to charge the battery and pro-

vide the DC input to the inverter. Its design limits reflected harmonic current distortion to source power and pro-

vides low-ripple DC power for charging batteries. Multiple rectifier/chargers can share a common battery plant,

if that configuration is preferred for your application.

Inverter: The inverter converts DC power into the precise AC power required to supply a sensitive critical load.

The inverter converts DC power into a pulse-width-modulated (PWM)/six-step waveform that is easily filtered

into a clean sine wave output. The PWM/stepwave also minimizes the harmonic voltage distortion caused by

typical switching power supplies and other non-linear load components used in computers and related electron-

ics.

Battery Plant

The battery is used as the alternate source of power to supply DC power to the inverter if the AC supply voltage

is outside the acceptable range. The battery supplies power to the inverter until the utility power is restored or

until an alternate power source is available. If AC source power is not restored or an alternate power source is not

available, the battery can be sized to provide power long enough for an orderly shutdown of the load.

CB - Circuit Breaker

MBD - Module Battery Disconnect

SCC - System Control Cabinet

Rectifier/

Charger

Controls

CONTROL POWER

MULTI-MODULE UPS SYSTEM

Inverter

MBD

Utility

Input

Power

Control

Wiring

To SCC

Battery

Output

Power

To SCC

Output

Input

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Theory of Operation 15

2.2 Detailed Component Descriptions

2.2.1 Controls

Hardware

The Series 600T UPS Operator Interface Display System is designed to provide all of the information that is

required for the operation of each UPS cabinet (the System Control Cabinet and each module). The following is

a list of the hardware features:

1. The control logic performs automatic operations with minimal operator interface. The limited number of

manual controls are easy-to-use.

2. Each Series 600T UPS cabinet is equipped with an easy-to-read 640 x 200 pixel liquid crystal display (LCD)

screen. It presents information in a way that is easy to understand at an eye-level front panel location.

3. The display is controlled by a dedicated microprocessor with a non-volatile (EPROM) program and a

battery-backed event memory.

4. The Series 600T System Control Cabinet (SCC) has communication ports (terminal board connections) for:

a. Transmission of present status information to remote terminals via resident auto-dial communications

program and an external modem. This port also responds to inquiries of the UPS system status and

history from the remote terminal.

b. Reporting UPS system status and history information in response to inquiries from a local terminal (no

modem required).

c. Reporting to a local monitor the information requested from the local terminal.

d. Reporting information to a Liebert SiteScan central monitoring system.

e. Relaying selected alarm messages to a Liebert Remote Monitor Panel and to a separate terminal board

for customer use.

f. Relaying performance and status information to your network monitoring system via SNMP interface.

Firmware

The Operator Interface Display System software enables the operator to monitor the UPS system status, to con-

trol the power flow through the UPS, to monitor all of the meter readings, to execute the start-up, shutdown, and

the load transfer procedures, to access the event history files, and to make adjustments to the programmable

parameters. The following is a list of the firmware features:

1. The menu-driven software prompts the operator for input.

2. Step-by-step instructions assist the operator during start-up, shutdown, and load transfer procedures. This

helps to eliminate operator errors.

3. Graphics-based mimic diagrams illustrate circuit breaker status and the power flow through the UPS system.

4. The Present Status screen reports information about the system’s present status. The History Status screen

chronicles the events leading up to and immediately after a fault. The Event History screen lists all of the

alarm messages that have been logged over a period of time.

5. The Battery Cycle Monitor records information on up to 132 battery discharge events. Information includes

date, time, length of discharge, highest current demand, lowest battery voltage, and cumulative battery amp

hours discharged.

Refer to 3.0 - Operation for a description of the controls and indicators located on the Operator Control Panel.

2.2.2 Rectifier/Charger

The UPS module rectifier/charger consists of an input circuit breaker, optional input isolation transformer, AC

current limiting circuit, battery equalize charge circuit, DC filter, battery charge current limiting circuit, and

bridge rectifiers.

Operation

The rectifier/charger converts the AC input power to DC power. This conversion is accomplished by 3-phase

bridge rectifiers using SCRs. All phases are individually fused. Reflected input current THD is less than 7% at

NOTE

All external communication devices are optional equipment.

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16 Theory of Operation

full load with optional input filter. For modules 500 kVA and larger, the optional 12-pulse rectifier reduces

reflected THD to less than 4% with optional filter, or 9% without.

The filtered output of the rectifier/charger provides regulated DC power to drive the inverter and charge the bat-

tery.

Input Circuit Breaker

The input circuit breaker (CB1) is sized to allow enough current to recharge the battery and supply a full rated

load at the same time. The circuit breaker contains a thermal magnetic trip mechanism and an undervoltage

release that interrupts power, preventing damage to the system, if there is an internal AC over-current condition

or a short circuit. The circuit breaker also opens during certain alarmed faults. This circuit breaker must be closed

manually.

Isolation Transformer

The optional input isolation transformer has a dry type core, and copper windings with class H insulation. The

transformer on modules with standard 6-pulse rectifier has wye primary and delta secondary windings. For mod-

els with the optional 12-pulse rectifier, the transformer has a delta primary, with delta and wye secondary wind-

ings. The isolation transformer provides the initial step of critical bus isolation. This reduces the AC shock

hazard at the battery and at other DC components, and prevents a DC fault from disrupting upstream AC cir-

cuitry.

The transformer has a nominal tap and one tap 6% below the rated nominal input voltage (normally used for 460

VAC input).

Input Current Limit

AC input current-sensing transformers (CTs) are used to measure current levels. Control circuitry connected to

the CTs restricts the AC current to less than 125% of the full input current rating by reducing the battery charging

voltage. This current limit is adjustable from 100 to 125% and is factory set at 115%. A second (optional) level

of input current limit can be initiated by an external contact closure (field supplied for use with back-up genera-

tor), and is adjustable from 85 to 100% (factory set at 100%).

During a start-up procedure, the current slowly ramps up (walks-in) from 20% of the rated input current to 100%

over a 15 to 21 second period. The maximum rate of change of the AC input current is 15% per second. The

input current walk-in reduces the start-up surge distortion effects on all other equipment connected to the same

source and prolongs the service life of internal components.

Input Current Inrush

The maximum sub-cycle of inrush current due to the optional input isolation transformer is less than 500-800%

of the rated input current for the first 1/2 cycle. Without the optional transformer, inrush current is typically less

than 2-3 times normal.

Input Power Factor

The rated input power factor is no less than 0.85 lagging at the nominal input voltage and the full rated UPS load.

The optional input filter will improve the power factor to better than 0.92 lagging at full load. Refer to published

specifications for your UPS model.

2.2.3 Battery Charging Circuit

The UPS module charging circuit is capable of recharging the battery plant to 95% of full capacity within 10

times the discharge time. Recharging the last 5% takes longer because of characteristics inherent in the battery.

DC ripple voltage is limited to less than 0.5% RMS to preserve battery life during long-term float charging while

the UPS system is operating on utility source power.

Multiple UPS module rectifier/chargers can share a common battery plant, if that configuration is preferred for

your application.

Operation After Discharge

When commercial power is interrupted, the battery continues to supply DC power to the inverter without inter-

ruption to the critical load. If the AC source power is restored before the battery has fully discharged, the rectifier

automatically restarts and resumes carrying the inverter and battery recharge load requirements.

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Theory of Operation 17

Operation After End-of-Discharge

The battery time screen displayed on the control panel enables you to estimate when battery shutdown will occur.

You will have enough time to energize an alternate AC power source or to initiate an orderly shutdown of the

critical load. If the battery plant discharges to the shutdown point during an outage, the UPS automatically dis-

connects the load, the AC input, and the battery. After AC input power is restored, the rectifier can be manually

restarted by the user.

Battery Disconnect

The external module battery disconnect (MBD) circuit breaker is used to isolate the UPS module from the bat-

tery during maintenance and to automatically disconnect the battery from the inverter at the end of battery dis-

charge. The MBD circuit breaker can be opened or tripped automatically, from the control panel, or manually. It

must be closed manually.

Battery Charge Current Limiting

The battery recharge current, after a battery discharge, is limited to between 1 and 25% (adjustable) of the full

load discharge current. An additional (optional) charge-limiting circuit can be activated by external dry contact

closure (field supplied) for use when operating on a back-up generator. These two levels of control regulate the

amount of current that flows from the power source to the battery while the battery is recharging.

The battery charge current limit is factory set at 10% for normal operation and at 1% for alternate power source

recharge operation.

Battery Equalize Charge Circuit

The battery equalize charge feature can be manually initiated or it can be programmed to operate automatically.

Either can be selected from the battery equalize screen displayed on the control panel.

The battery equalizing charge circuit increases the rectifier/charger output voltage to charge the battery any time

there is a power outage of 30 seconds or longer. The equalizing voltage is slightly higher than the float voltage.

This decreases the time required to recharge the battery.

NOTE

Do not use equalize charging with valve-regulated lead-acid batteries

Consult the battery manufacturer's manual for specific information about equalize

charging.

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18 Theory of Operation

2.2.4 Inverter

The inverter is a solid state device that converts the DC output of the rectifier/charger or the battery to AC power.

Operation

The inverter converts DC power—from either the battery or the rectifier/charger—into three pulse-width-modu-

lated/six-step waveforms. These waveforms are filtered into low-distortion sine wave power. The inverter is con-

trolled by an Application-Specific Integrated Circuit (ASIC). This integrated circuit controls the precise

synchronization, amplitude, and frequency of the output voltage.

In addition to the inverter efficiently supplying a regulated AC output from a DC source, the output isolation

transformer acts as a second stage of isolation between the critical load bus and the commercial source power.

The inverter is configured to handle most critical load inrush surges. It maintains output voltage Total Harmonic

Distortion (THD) within specifications even when handling non-linear computer loads. Refer to non-linear load

characteristics.

Output Regulation and Overload Performance

The inverter is capable of sustaining full output voltage ±2% of the nominal voltage) for up to 150% overload at

the output for as long as 30 seconds without reducing the output voltage. It can also handle at least 125% of the

rated current for up to 10 minutes and 104% of the rated current continuously. The System Control Cabinet

(SCC) will transfer the critical load to the bypass source if the overload exceeds the system capacity or the capac-

ity of the modules on-line. The multi-module overload capacity (in terms of percent of rated full load current of

modules on-line) is 140% for 20 seconds, 108% for 10 minutes, and 104% continuously.

Note that in normal operation the SCC will transfer the load to bypass before a UPS module exceeds its overload

capacity. If a module overload condition is sustained (beyond inverter capacity) the UPS module is automatically

taken off-line (disconnected from the critical bus) and is shut down. If the UPS system is operating in the redun-

dant mode, the load may remain on the UPS system. Refer to 3.4 - Automatic Operations.

Non-Linear Load Characteristics

Computers and computer equipment with switching power supplies generate non-linear currents rich in fifth and

seventh harmonics.

The inverter pulse-width-modulated/six-step waveform, coupled with the output filter, provides a natural path

for reducing the fifth and seventh harmonic currents produced by the load. The inverter/filter limits the output

voltage THD to less than 5% with up to 100% typical electronic data processing (EDP) loads. EDP equipment

characteristically includes both non-linear and linear load components.

Unbalanced Load Characteristics

Unbalanced loads are actively regulated. The phase-to-phase voltage balance is maintained to within 2%, even

with a 50% load imbalance.

The three-phase, root mean square (RMS—approximately 70% of the peak) average voltage is also regulated

through a separate control circuit (phase-to-phase sensing).

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Theory of Operation 19

2.2.5 Static Bypass

A static bypass is an integral part of the UPS System Control Cabinet (SCC). Refer to Figure 7. The static

bypass consists of solid-state switching devices working in conjunction with the motor-operated System Bypass

Breaker (SBB). An automatic transfer control circuit senses the status of the operator controls, UPS logic signals

and alarm messages, and critical bus operating conditions. If the UPS modules can no longer supply the critical

load, the static bypass switch (in conjunction with the SBB and UPS Output Breaker) automatically transfers the

critical load to the bypass source without interruption.

Figure 7 System Control Cabinet (SCC) Block Diagram

Fuse Protection

The static bypass switch path uses two back-to-back SCRs per phase. Each phase is individually protected by a

fuse sized to clear only in the event of a catastrophic fault. This is a more reliable method than depending on

external protection devices. The fuses are in the circuit to protect the critical bus distribution equipment against

catastrophic faults. The static switch SCRs are oversized to easily handle any current surges that may blow the

fuses.

Shorted SCR Monitoring

The static bypass system has redundant shorted SCR sensing circuits and disconnects. This will prevent UPS out-

put power backfeed to the distribution system even if two component failures exist simultaneously. If a shorted

SCR is detected, the static bypass switch is isolated and annunciated at the SCC control panel, and the critical

load remains on UPS output power.

Static Switch Isolation

The motor-operated system bypass circuit breaker (SBB), wired in parallel with the static switch, automatically

closes in approximately 200 milliseconds after the load is transferred to the bypass power source, removing the

static switch from the power flow.

UPS Output

Gate

Driver

Sync &

Transfer

Control

Power

Supply

Voltage

Adjust

Alarms

Static

Bypass

Switch

Static Bypass Breaker

Transfer

Control

Static Switch

Disconnects

Bypass Line

UPS

System

Modules

To Critical

Load

System

Monitor

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20 Theory of Operation

Also, if required for maintenance, the static switch can be isolated from the bypass line by opening (to the OFF

position) the Static Switch Disconnects.

Pulsed Parallel Operation

When an overload condition such as magnetic inrush current or a branch load circuit fault exceeds the overload

capacity of the connected modules, the static bypass switch pulses on for 40 milliseconds. This allows up to

1000% of the rated full load current from the bypass line to clear the overload without closing the bypass circuit

breaker. The bypass source is briefly in parallel with the UPS system, permitting the bypass source to carry the

initial overload current. If the overload clears before 40 milliseconds, a load transfer to bypass is not made. If the

overload condition continues, the automatic transfer is made (maintaining the load voltage within the specified

limits).

This pulsed static switch operation reduces nuisance operation of motor-operated circuit breakers for such short-

term conditions.

Load Transfers

Transfers to (transfer) or from (retransfer) the bypass may be performed automatically or manually in a make-

before-break sequence. This is accomplished through the overlapping operation of the UPS output and the sys-

tem bypass power switching devices.

Manual load transfers and retransfers are initiated by the operator from the System Control Cabinet (SCC).

In a manual operation, or an automatic retransfer, the two motorized circuit breakers—UPS output and system

bypass—are both closed simultaneously for a short period of time (overlap).

Automatic transfers are initiated by the SCC system control logic when an overload is beyond the specified capa-

bilities of the UPS system or when a fault occurs within a non-redundant UPS module. An automatic retransfer is

initiated if this function is enabled and if system conditions for a retransfer are present.

In an automatic transfer, the circuit breakers do not overlap, but during the short time gap bypass power is sup-

plied to the critical load through the solid state static switch.

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Theory of Operation 21

Transfer and Retransfer Conditions

1. Automatic Transfers to Bypass

Critical bus conditions that will initiate an automatic transfer of the critical load from the UPS system to the

bypass source are:

a. System Overload: overcurrent condition in excess of the overload rating of the System Control Cabinet

(SCC).

b. Output Overload: overcurrent condition in excess of the current-versus-time overload capacity of UPS

modules ON LINE.

c. Over/Under Voltage (OV/UV): critical bus voltage is outside the allowable tolerance.

d. Non-redundant UPS Module Inoperative: an essential UPS module is taken OFF LINE for one of the

reasons below.

1. Battery discharged to the shutdown voltage.

2. Inverter overload capacity exceeded.

3. Inverter or rectifier fault condition (power, logic, or over-temperature) present or imminent.

4. Failure of UPS module logic or logic power.

e. SCC Logic:

1. Emergency Module Off (EMO) circuit activated.

2. Failure of UPS system logic or logic power.

2. Manual Transfers

Manual transfers may be initiated at any time provided no transfer inhibition conditions are present.

3. Transfer Inhibited

A manual transfer to the bypass source shall be inhibited if any of the following conditions exist:

a. Bypass frequency deviates ±0.5 Hz from the nominal.

b. UPS system to bypass voltage difference ( V) exceeds a predetermined percentage (normally 5%).

c. Static switch disconnects (manual switches) open.

d. OK to Transfer signal from the control logic is not present.

4. Automatic Retransfers to UPS

Critical bus conditions that must be present to initiate an automatic retransfer (Auto-Rexfer) of the critical

load from the bypass source to the UPS system are:

a. The number of Auto-Rexfer Attempts selected must be greater than zero (0). If zero (0) is selected, no

automatic retransfer will occur.

b. Critical load was initially transferred to the bypass source due to a system overload only.

c. Overload has since dropped below 100% of the rated SCC current.

d. Enough UPS modules are ON LINE to supply the critical load.

e. OK to Transfer signal received from the control logic for at least 10 seconds, within 5 minutes of the

overload transfer. (A manually initiated retransfer from bypass is required for overloads lasting 5

minutes or more.)

f. Cyclic-type system overloads, which occur up to five (select range is 0 to 5) times in 60 minutes, are

automatically returned to the UPS system for each event including the Nth overload. A manually

initiated retransfer from bypass is required for the N+1 overload.

NOTE

A load transfer to the bypass line will be completed whenever an automatic transfer

to bypass is initiated If the Static Switch Unable alarm message is present for any

reason (including a ±20° phase lock synchronization error), the automatic transfer

will be interrupted for 40 to 120 milliseconds. Because of the reliability of the UPS

components, an interrupted load transfer is a very unlikely occurrence.

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22 Theory of Operation

5. Manual Retransfers

Manual retransfers may be initiated at any time provided no retransfer inhibition conditions are present.

6. Retransfer Inhibited

A retransfer from the bypass source to the UPS system shall be inhibited if any of the following conditions

exist:

a. Manual (and Automatic) Retransfer Inhibitions:

1. Bypass frequency exceeds ±0.5 Hz of the nominal.

2. UPS system-to-bypass voltage difference ( V) exceeds a predetermined percentage (normally

5%).

3. System circuit breaker (UPS output or SBB) is inoperative.

4. OK to Transfer signal from the control logic is not present.

5. Not enough UPS modules are ON LINE to supply the connected critical load.

b. Automatic Retransfer Inhibitions (in addition to those above):

1. The load transfer to bypass was not caused by a system overload.

2. Excessive cyclical overloads within a one-hour period.

3. Retransfer conditions are not satisfied within 5 minutes of the initial transfer.

2.2.6 Redundant Mode

The typical multi-module UPS system is configured with a back-up (redundant) UPS module, connected in par-

allel to share the critical load with the other module(s). This parallel redundant system includes one more module

than is required to supply the full critical load.

A parallel redundant system will always be in the Redundant Mode if all modules are ON LINE. In addition, if

the critical load is reduced so that not all ON LINE modules are required, the UPS system can also operate in the

Redundant Mode with one or more modules OFF LINE. The critical load will remain on the UPS system—even

if one or more of the modules is taken OFF LINE for maintenance or because of an internal fault—as long as the

remaining ON LINE modules can carry the full connected system load.

The system control logic monitors the connected critical load and the number of UPS modules ON LINE. If the

UPS system is operating in the Redundant Mode, the REDUNDANT status message will be displayed at the

System Control Cabinet (SCC). If the UPS system is operating in the Non-Redundant Mode (redundant module

is OFF LINE or was not included in the system configuration), the NON-REDUNDANT status message is dis-

played at the SCC. In the Non-Redundant Mode, the critical load will be transferred to bypass if any UPS module

goes OFF LINE and the remaining ON LINE module(s) cannot carry the connected load without being over-

loaded.

The system control logic, located in the SCC, automatically adjusts the allowable overload limits based on the

connected load and the number of modules ON LINE.

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Operation 23

3.0 OPERATION

3.1 Display Screen and Operator Controls

Each Liebert Series 600T UPS cabinet is equipped with a microprocessor-based Operator Control Panel and Dis-

play Screen and System Control Panel designed for convenient and reliable operation. The System Control Cab-

inet (SCC) performs different functions than the UPS modules. Each cabinet has the controls and displays

required to operate and monitor its functions. The locations of operator controls are shown in Figure 8 through

Figure 11.

The front location of the control panel enables the user to quickly identify the current status of the UPS system

and to perform most of the manual operations. The operator display screen is driven by an easy-to-follow menu-

prompted software program.

Features

The Series 600T interface display system enables the operator to easily perform the following:

• Obtain a quick indication of operational status:

• Is the critical bus OK?

• Is the UPS system OK?

• Which UPS modules are available?

• Is the battery available?

• Is the bypass line available?

• Monitor the power flow through the UPS system and monitor all meter readings:

• Is the critical load being supplied power from the UPS system or bypass?

• Are input, battery, and output voltage, frequency, and current readings at nominal levels?

• How much battery time is still available during an outage?

• Is the battery recharging after discharge?

• Execute operational procedures:

• Perform critical bus transfer/retransfer between the UPS system and the bypass line.

• Start-up and shut down the UPS system and each module.

• Shutdown the system and all modules instantly in the event of an emergency.

• Access status reports and history files:

• Obtain a complete listing of the present status of the UPS system and all modules (input, output, and

battery voltage, frequency, and current readings, and any alarms that may be present).

• Review a complete history report of all events leading up to and immediately after a fault condition.

• Examine an archive listing of all alarm conditions that have occurred over a period of time.

• Make adjustments to programmable parameters (access limited by Security Access function):

• Set the date and the time functions.

• Change the auto-dial phone number and the modem options.

• Select the number of auto-retransfer attempts.

• Make adjustment to the UPS output voltage before performing a manual load transfer.

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24 Operation

Figure 8 Operator Controls, 65 to 80 kVA (left) and 100 to 500 kVA (right)

Item Description Function

1 Input Circuit Breaker

(behind door of 65-80

kVA) (CB1)

This manually operated circuit breaker provides power to the UPS module rectifier.

In 625-750 kVA modules and some 500 kVA modules, this breaker is located in the

transformer cabinet.

2 Module Output Circuit

Breaker (behind door of

65-80 kVA) (CB2)

This manually operated circuit breaker connects the UPS module inverter output to

the UPS System Control Cabinet.

3 Operator Control Panel Refer to Figure 10 for controls available on this panel.

4 Control Disconnect

(behind inner door)

These two fuses provide power to the controls. They are normally closed (ON).

Turn Control Power OFF (by opening the two fuse holders) only for maintenance

procedures.

5 Interlock Button

(on rear of Control Panel)

Press this button to make authorized changes to any parameter protected by the

Security Access function. This includes time, date, auto-dial phone numbers, etc.

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Operation 25

Figure 9 System Control Cabinet Operator Controls (SCCB Pictured)

Item Description Function

1 UPS Output Circuit

Breaker

This motorized circuit breaker connects the critical load to the UPS system output.

2 System Bypass Circuit

Breaker

This motorized circuit breaker connects the critical load to the bypass line.

3 Operator Control Panel Refer to Figure 10 for controls available on this panel.

4 Interlock Button

(on rear of Control Panel)

Refer to Figure 11.

5 Close Bypass Switch

(behind door)

Refer to Figure 11.

6 Bypass Reset Switch

(behind door)

Refer to Figure 11.

7 Static Switch Disconnects

(behind door)

These manually operated switches disconnect the static switch from the bypass

line and from the critical load. They are normally ON (closed). Turn them OFF

(open) only to isolate (disconnect) the static switch for maintenance procedures.

8 Reset Switches (SW1) for

Static Switch Disconnects

(behind door)

Press these two switches before closing Static Switch Disconnects when

recovering from a shutdown that includes loss of Control Power. Green LED on

means Control Power is available. Red LED on means Reset Switch needs to be

pushed.

9 Control Power Disconnect

(behind door)

Normally ON. Turn OFF Control Power only when required for maintenance

procedures.

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26 Operation

Figure 10 Series 600T UPS and SCC Operator Control Panels

Item Description (Location) Function

1 Display Screen

(SCC and modules)

This screen displays all vital UPS information in one convenient location. All of the UPS

monitoring functions and conditions are indicated here.

2 Up

(SCC and modules)

This touch-sensitive pad (button) is used to move the cursor up through various

selections present on the display screen. Note that all pads on this control panel have

touch-sensitive switches behind them.

3 Down

(SCC and modules)

Similar to the Up pad, this pad is used to move the cursor down through the various

selections present on the display screen.

4 Select

(SCC and modules)

After choosing the desired item (with highlighted cursor) from the display screen with

the Up and Down pads, pushing this pad tells the microprocessor to go to the

highlighted selection.

5 Alarm Reset

(SCC and modules)

This pad is used to clear all of the alarm conditions that are no longer present.

However, all active alarms remain in memory and on the applicable screens until they

are corrected. This pad also resets the History Status Report memory buffer when held

until the screen clears.

6 Voltage Adjust

(SCC only)

This push-to-turn knob permits adjustment of the UPS output voltage to meet load

requirements or to match the bypass voltage before transferring the load to or from

bypass.

7 UPS

(SCC only)

This pad activates the circuits that connect the UPS to the critical load (a retransfer).

When this pad is pushed (along with Control Enable), the UPS output circuit breaker

closes and the bypass circuit breaker opens.

8 Bypass

(SCC only)

This pad activates the circuits that connect the bypass line to the critical load (a

transfer). When this button is pushed (along with Control Enable), the bypass circuit

breaker closes and the UPS output circuit breaker opens.

9 Control Enable

(SCC and modules)

This pad must be pressed simultaneously with the UPS, Bypass, Battery Trip, or Output

Trip pads to activate them.

10 Horn Off

(SCC only)

This pad is used to silence the alarm horn after it is activated. When this switch is

pressed, the alarm horn is silenced but the active and latched alarm messages remain

on the screen. The alarm messages still displayed stop flashing to indicate they have

been acknowledged.

11 Alarm Horn and

Red LED (SCC only)

This electronic horn sounds to alert nearby personnel whenever a new alarm occurs. A

red LED (light emitting diode) is located in the middle of the alarm horn.

12 Emergency Module

Off (SCC only)

During an emergency, pressing this guarded switch will transfer the load to bypass and

then shut down the UPS modules. The load will remain on bypass power. (Refer to

3.3.3 - Shutdown Procedures.)

13 Battery Trip

(modules only)

This pad can be used (along with Control Enable) to trip the module battery disconnect

(MBD) circuit breaker open (disconnecting the battery from the UPS module).

14 Output Trip

(modules only)

This pad can be used (along with Control Enable) to trip the module output circuit

breaker open (disconnecting the module from the UPS system).

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Operation 27

Figure 11 Switches Behind SCC Control Panel Door

Item Description (Location) Function

1 Interlock Button

(on rear of Control Panel)

Press this button to make authorized changes to any site parameter protected by

the Security Access function. These include the time, date, auto-dial phone

number, and other site parameters.

2 Bypass Reset Switch

(SW1, on Transfer

Relay Board)

Press this button to reset the transfer relays during start-up, after an Emergency

Power Off shutdown. You must press this button before the Close Bypass Switch

(Item 3).

3 Close Bypass Switch

(SW1, on System

Interface Board)

Press this button to close the Bypass circuit breaker during a start-up procedure, if

it remains open after a shutdown procedure (refer to 3.3.1 - Start-Up Procedure).

Note that the Static Switch Disconnects must be OFF to reset the Bypass circuit

breaker. See also Bypass Reset Switch (Item 2).

DISCONTINUED

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28 Operation

Figure 12 Menu Tree

Figure 12 illustrates the primary screens that you can access through the Operator Interface Display System. The

liquid crystal display (LCD) screen provides a full 80 characters by 25 lines of information for easy readability.

The following subsections describe what these screens display and how and when to use them.

Module status information is available on the display screen, provided Control Power is ON, even when the

UPS module is not operating. System status information is available on the SCC display screen and at local and

remote terminals when at least one module is on-line or when the bypass source is available.

The screen will automatically display the Monitor/Mimic during normal operation. The System configuration

screen will be displayed during start-up and whenever a system reset is required.

If a module display screen is blank, either power is not available, the Rectifier Input (RIB) circuit breaker (exter-

nal to the UPS module) is open, or the Control Power switch is OFF. If power is available and a display is blank,

contact Liebert Global Services. Note that status information may be available at local and remote terminals. Use

control touch pads at the SCC to manually transfer the critical load to the bypass line if the SCC display goes

blank while load is on UPS (a very unlikely event).

DISCONTINUED

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Operation 29

3.1.1 Master Menu Screen

The Master Menu contains the primary menu selections that monitor and control the operation of the UPS.

Figure 13 Master Menu Screens, SCC (above) and Module (below)

From any primary screen (accessed directly from the Master Menu), pushing the Select pad once will return you

to the Master Menu. From any secondary screen, pushing the Select pad twice will return you to the Master

Menu.

Please note that some screens have multiple pages. However, in each case instructions appear for accessing other

pages.

1. MONITOR/MIMIC DISPLAY.

This graphic mimics the power flow through the UPS system. Input voltage and current readings, battery

status, UPS ratings, load readings, circuit breaker indications, system status, and alarm messages are all dis-

played on this screen.

2. WALK-IN DISPLAY (modules only).

This is a bar graph that shows DC bus voltage, input currents, and UPS module output voltage (all in percent

of nominal).

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

WALK-IN DISPLAY

STATUS REPORTS

SYSTEM CONFIGURATION

LIMIT SETTINGS

START-UP PROCEDURES

SHUTDOWN PROCEDURES

BATTERY TIME

METER CALIBRATION

BATTERY EQUALIZE

MONITOR/MIMIC DISPLAY

MASTER MENU

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

STATUS REPORTS

SYSTEM CONFIGURATION

LIMIT SETTINGS

LOAD TRANSFER PROCEDURES

START-UP PROCEDURES

SHUTDOWN PROCEDURES

METER CALIBRATION

BATTERY EQUALIZE

CUSTOMER ALARM DEFINITIONS

MONITOR/MIMIC DISPLAY

MASTER MENU

DISCONTINUED

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30 Operation

3. STATUS REPORTS.

This display consists of three sub-menu selections: present status, history status, and event history. These

screens display data on the system’s present and past performance. They also display information about any

faults that have occurred in the system and total operating hours for the controls.

4. SYSTEM CONFIGURATION.

This screen displays the current configuration of the UPS system. It also enables the operator to reset the

date, time, and dial-out phone numbers. The SCC current rating can also be adjusted lower than design max-

imum. The operator can view, but cannot change, any of the settings unless the Interlock (Security Access)

button is pressed.

5. LIMIT SETTINGS.

This security access display shows the present UPS system alarm limit settings. The operator can view the

settings, but they should not be changed without consulting Liebert Global Services.

6. LOAD TRANSFER PROCEDURES (SCC only).

This screen specifies all of the steps required to manually transfer the critical load between the UPS system

and the bypass source. Comparisons of the voltage frequency, and phase synchronization of the UPS system

output and the bypass line are also illustrated to aid in the transfer or retransfer procedure.

7. START-UP PROCEDURES.

This two-page screen lists step-by-step procedures to start the UPS system and the modules.

8. SHUTDOWN PROCEDURES.

This two-page screen lists the proper sequence of steps to shutdown the UPS system and the modules for

maintenance or repairs. The steps instruct the operator to transfer the critical load to bypass, open the battery

circuit breakers, and open the UPS module output and input circuit breakers to shut down and isolate the

modules. The critical load will remain on bypass power unless circuit breakers outside the UPS system are

also opened.

9. BATTERY TIME (modules only).

This graph displays the projected battery voltage drop caused by a battery discharge over time. During a

period of battery discharge, the Series 600T calculates the battery time remaining based on battery rating,

initial battery condition, and actual connected load. The UPS continues to update and display both rated

(theoretical) and calculated time every 6 seconds. This enables the operator to immediately see the effects of

load shedding on time remaining and to accurately assess his power resources.

10. METER CALIBRATION.

This security access screen enables an authorized Liebert field-service engineer to adjust and calibrate the

UPS metered functions. The operator can view, but should not change, any of the settings

11. BATTERY EQUALIZE.

The battery equalize screen lets the operator change the battery equalize recharging mode from manual to

automatic and to observe or change the equalize time. Battery equalize charge voltage is higher than battery

float (constant) charge voltage.

12. CUSTOMER ALARM DEFINITIONS (SCC only).

This optional screen allows the operator to define alarms for conditions external to the UPS, battery, or

switchgear.

NOTE

Do not use battery equalize charging with sealed-cell batteries. Refer to the battery

manufacturer’s manual for specific information about equalize charging.

DISCONTINUED

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Operation 31

3.1.2 Monitor/Mimic Display Screen

From SCC Master Menu move the highlighted cursor to MONITOR/MIMIC DISPLAY. Press the Select pad

and the Monitor/Mimic screen is displayed.

The Monitor/Mimic display screen is a simplified block diagram of the UPS system. This screen gives the oper-

ator an overall view of the power flow through the UPS system. The screen consists of three major sections: the

input/UPS metering section, the load metering section, and the status and alarm message areas. The metered

parameter values on the Monitor/Mimic screen are updated at one-second intervals.

Figure 14 SCC Monitor/Mimic Display Screen

Input Metering Displays

Item 1 - Bypass Input. This block displays the bypass input voltage and the bypass input frequency. The System

Bypass Breaker is shown to the right of this block. The status of the circuit breaker is illustrated as open or

closed.

Item 2 - UPS Input Pwr. This block displays the input voltage to the UPS modules.

Output Metering Displays

Item 3 - UPS Ratings. The SCC current rating is specified at the top of this block. The UPS system output volt-

age and frequency are also displayed in this block. The UPS Output Breaker is shown to the right of this block.

The status of the circuit breaker is illustrated as open or closed.

Item 4 - Load. This block displays the total output power to the critical load in kVA and kW. The critical load

current per phase is also displayed in this block. Note that kW is not displayed when the load is on the bypass

line.

The load block also indicates the number of modules connected and whether the UPS system is operating in the

redundant or non-redundant mode.

During an overload condition, the time remaining before shutdown or transfer is displayed at the bottom of the

load box.

NOTE

All voltage readings are phase-to-phase measurements (A-B, B-C, and C-A). All

current readings are phase measurements (A, B, and C).

UPS INPUT PWR

480V 480V 480V

UPS RATINGS

A-B B-C C-A

480V 480V 480V

60.0 Hz

SCCB 1600

OUTPUT VOLTAGE

BYPASS INPUT

A-B B-C C-A

480V 480V 480V

60.0 Hz

LOAD

A BC

627 KVA / 502 KW

755A 755A 755A

3 OF 3 MODULES

CONNECTED

REDUNDANT

A-B B-C C-A

OK to Transfer

Static Switch Connected

MOD 1 ON LINE

MOD 2 ON LINE

MOD 3 ON LINE

DISCONTINUED

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32 Operation

Status/Alarm Message Areas

The status/alarm message areas display vital information about the operation of the UPS system. During normal

operation no alarm messages should be present. Changes in the status of the system and possible alarm condi-

tions can be monitored. Both the status and the alarm messages are displayed in reverse video (highlighted—

light on dark). The alarm messages continue flashing until the Horn Off pad is pressed. To clear a latching

alarm, you must also press the Alarm Reset pad after the alarm condition is corrected.

The following lists show the status and alarm messages that may be displayed in these areas. For more informa-

tion and the corrective actions for these messages, refer to Table 1 in this section.

Item 5 - Module Status Messages

Module On Line

Module Off Line

Module Summary Alarm

Module Communication Failure

Item 6 - System Status Messages

Static Switch Connected

Static Switch Disconnected

OK To Transfer

Not OK To Transfer

Item 7 - Alarm Messages

Load On Bypass

Auto Retransfer Primed

Manual Reset/Retransfer

Static Switch Unable

Bypass Not Available

Bypass Phase Sequence Wrong

Control Power Fail

Output Over/Under Frequency

Output Under-Voltage

Output Over-Voltage

Overload

Overload Transfer

Emergency Off

Module Summary Alarm

Battery Cycle Buffer Warning

NOTE

The Alarm Reset pad also resets the History Status Report memory buffer when it is

held for 15 seconds (or until the screen clears).

DISCONTINUED

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Operation 33

From module Master Menu move the highlighted cursor to MONITOR/MIMIC DISPLAY. Press the Select

pad and the Monitor/Mimic screen is displayed.

The Monitor/Mimic display screen is a simplified block diagram of the UPS module and power connections.

This screen gives the operator an overall view of the power flow through the UPS module. The screen consists of

three major sections: the input/UPS metering section, the load metering section, and the status and alarm mes-

sage areas. The metered parameter values on the Monitor/Mimic screen are updated at one second intervals.

Figure 15 Module Monitor/Mimic Display Screen

Input Metering Displays

Item 1 - UPS Input Pwr. This block displays the UPS module input voltage and current. The Module Input

breaker is shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.

Item 2 - Battery. The battery block displays the DC bus voltage and the charge or discharge current to or from

the battery. This block reads MODULE DC BUS when the battery circuit breaker is open and BATTERY when

the battery circuit breaker is closed during normal operation. This block reads BATTERY EQUALIZE when

the battery equalize charge voltage is used to recharge the battery. The Module Battery Disconnect (MBD) is

shown to the right of this block. The status of the circuit breaker is illustrated as open or closed.

Output Metering Displays

Item 3 - UPS Ratings. The module part number and kVA rating are specified at the top of this block. The UPS

output voltage and frequency are also displayed in this block. The Module Output breaker is shown to the right of

this block. The status of the circuit breaker is illustrated as open or closed.

Item 4 - Load. This block displays the module output power to the critical load in kVA and kW. The critical load

current per phase is also displayed in this block.

NOTE

All voltage readings are phase-to-phase measurements (A-B, B-C, and C-A). All

current readings are phase measurements (A, B, and C).

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 15 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

270 KVA

217 KW

A-B B-C C-A

480V

350A 350A

350A

AP648-84

RATED 400 K VA

480V 480V480V

60.0 Hz

325A 325A

325A

DISCONTINUED

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34 Operation

Alarm Messages

The alarm message area displays vital information about the operation of the UPS system. During normal opera-

tion no alarm messages should be present. Alarm conditions can be monitored. The alarm messages are dis-

played in reverse video (highlighted— light on dark). To clear a latching alarm, you must also press the Alarm

Reset pad after the alarm condition is corrected.

The following list shows the alarm messages that may be displayed in this area. For more information and the

corrective actions for these messages, refer to Table 1 in this section.

Item 5 - Alarm Messages

Input Fail

DC Ground Fault

DC Capacitor Fuse Blown

Battery CB Open

Battery Discharging

Low Battery Warning

Low Battery Shutdown

DC Over-Voltage Shutdown

Control Power Fail

Inverter Non-Synchronized

Overload

Overload Shutdown

Reverse Power

Rectifier Fuse Blown

Inverter Fault

Hardware Shutdown

Emergency Off

Ambient Over-Temperature

Blower Failed

Equipment Over-Temperature

Over-Temperature Timeout

NOTE

The Alarm Reset pad also resets the History Status Report memory buffer when it is

held for 15 second (or until screen clears).

DISCONTINUED

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Operation 35

Figure 16 through Figure 20 illustrate how the Monitor/Mimic Display screens on the SCC and on a module

depict the power flow through the UPS system.

A three module system designed for redundant operation is shown. A multi-module UPS system may include up

to six (6) modules for each System Control Cabinet (SCC).

Figure 16 Monitor/Mimic Display Screen Examples: Normal Power Flow, SCC (above) and Module

UPS INPUT PWR

UPS RATINGS

A-B B-C C-A

BYPASS INPUT

A-B B-C C-A

LOAD

A BC

A-B B-C C-A

OK to Transfer

Static Switch Connected

OUTPUT VOLTAGE

A BC

627 KVA

502 KW

3 OF 3 MODULES

CONNECTED

REDUNDANT

A-B B-C C-A

MOD 1 ON LINE

MOD 2 ON LINE

MOD 3 ON LINE

480V

480V480V

480V

480V480V

480V 480V 480V

60.0 Hz

SCCB 1600

60.0 Hz

755A

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 15 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

270 KVA

217 KW

A-B B-C C-A

480V 480V 480V

60.0 Hz

350A 350A350A

410A 410A

RATED 400 K VA

410A

AP648-84

DISCONTINUED

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36 Operation

Figure 17 Monitor/Mimic Display Screen Examples: Utility Fail, SCC (above) and Module

UPS RATINGS

LOAD

Byp Not Avail

Static Sw Unable

Module Sum Alm

UPS INPUT PWR

BYPASS INPUT

A-B B-C C-A

0V 0V 0V

0 Hz

0V 0V 0V

A-B B-C C-A

Not OK to Transfer

Static Switch Connected

MOD 1 ON LINE SUM ALM

MOD 2 ON LINE SUM ALM

MOD 3 ON LINE SUM ALM

A-B B-C C-A

OUTPUT VOLTAGE

627 KVA / 502 KW

3 OF 3 MODULES

CONNECTED

REDUNDANT

A BC

480V 480V 480V

60.0Hz

SCCB 1600

755A 755A 755A

BATTERY

VOLTS 480

AMPS 645 DISCHARG

UPS RATINGS

LOAD

Input Fail

Batt Discharging

UPS INPUT PWR

0V 0V 0V

0A 0A 0A

A-B B-C C-A

Not OK to Transfer

Static Switch Connected

A-B B-C C-A

OUTPUT VOLTAGE

A BC

270 KVA

217 KW

RATED 400 KVA

AP648-84

480V 480V 480V

60.0 Hz

325A325A325A

DISCONTINUED

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Operation 37

Figure 18 Monitor/Mimic Display Screen Examples: Load on Bypass, UPS Modules On and Charging

Battery, SCC (above) and Module

UPS INPUT PWR

UPS RATINGS

A-B B-C C-A

BYPASS INPUT

A-B B-C C-A

LOAD

A BC

A-B B-C C-A

OK to Transfer

Static Switch Connected

OUTPUT VOLTAGE

A BC

627 KVA / 502 KW

3 OF 3 MODULES

CONNECTED

REDUNDANT

A-B B-C C-A

MOD 1 ON LINE

MOD 2 ON LINE

MOD 3 ON LINE

Load On Bypass

755A

480V

480V480V

60.0 Hz

SCCB 1600

480V 480V 480V

480V

60.0 Hz

480V

755A

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 75 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

0 KVA / 0 KW

0A 0A 0A

A-B B-C C-A

480V 480V

480V

480V480V

480V

90A 90A 90A

AP648-84

RATED 400 KVA

60.0 Hz

DISCONTINUED

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38 Operation

Figure 19 Monitor/Mimic Display Screen Examples: Load on UPS, One UPS Module Off Line

SCC (above) and Module

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 75 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

0 KVA / 0 KW

0A 0A 0A

A-B B-C C-A

380V 380V380V

380V

75A 75A 75A

AP658-71

RATED 500 K VA

50.0 Hz

UPS RATINGS

LOAD

Module Sum Alm

OK to Transfer

Static Switch Connected

MOD 1 ON LINE

MOD 2 OFF LINE SUM ALM

MOD 3 ON LINE

A-B B-C C-A

OUTPUT VOLTAGE

627 KVA / 502 KW

2 OF 3 MODULES

CONNECTED

NON-REDUNDANT

A BC

BYPASS INPUT

A-B B-C C-A

UPS INPUT PWR

A-B B-C C-A

380V

50.0 Hz

380V

380V380V380V

50.0 Hz

953A953A

953A

SCCT 1600

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 15 CHARG

UPS RATINGS

A-B B-C C-A

AP648-84

RATED 400 KVA

OUTPUT VOLTAGE

LOAD

A-B B-C C-A

A BC

314 KVA / 251 KW

378A 378A 378A

480V

480V480V

405A405A405A 480V

480V 480V

60.0 Hz

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 75 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

0 KVA / 0 KW

0A 0A 0A

A-B B-C C-A

380V 380V380V

380V

75A 75A 75A

AP658-71

RATED 500 KVA

50.0 Hz

UPS RATINGS

LOAD

Module Sum Alm

OK to Transfer

Static Switch Connected

MOD 1 ON LINE

MOD 2 OFF LINE SUM ALM

MOD 3 ON LINE

A-B B-C C-A

OUTPUT VOLTAGE

627 KVA / 502 KW

2 OF 3 MODULES

CONNECTED

NON-REDUNDANT

A BC

BYPASS INPUT

A-B B-C C-A

UPS INPUT PWR

A-B B-C C-A

480V

60.0 Hz

480V

340V480V480V

60.0 Hz

755A755A

755A

SCCB 1600

DISCONTINUED

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Operation 39

Figure 20 Monitor/Mimic Display Screen Examples: Load on Bypass, All UPS Modules Off Line

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 75 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

0 KVA / 0 KW

0A 0A 0A

A-B B-C C-A

380V 380V380V

380V

75A 75A 75A

AP658-71

RATED 500 KVA

50.0 Hz

UPS RATINGS

LOAD

Load on Bypass

Static Sw Unable

Module Sum Alm

Not OK to Transfer

Static Switch Connected

MOD 1 OFF LINE SUM ALM

MOD 2 OFF LINE SUM ALM

MOD 3 OFF LINE SUM ALM

A-B B-C C-A

OUTPUT VOLTAGE

627 KVA / 502 KW

0 OF 3 MODULES

CONNECTED

NON-REDUNDANT

A BC

BYPASS INPUT

A-B B-C C-A

UPS INPUT PWR

A-B B-C C-A

480V

60.0 Hz

480V

0V0V0V

0 Hz

755A755A

755A

SCCB 1600

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 75 CHARG

UPS RATINGS

A-B B-C C-A

OUTPUT VOLTAGE

LOAD

A BC

0 KVA / 0 KW

0A 0A 0A

A-B B-C C-A

380V 380V

380V

380V380V

380V

75A 75A 75A

AP658-71

RATED 500 KVA

50.0 Hz

UPS RATINGS

LOAD

Module Sum Alm

OK to Transfer

Static Switch Connected

MOD 1 ON LINE

MOD 2 OFF LINE SUM ALM

MOD 3 ON LINE

A-B B-C C-A

OUTPUT VOLTAGE

627 KVA / 502 KW

2 OF 3 MODULES

CONNECTED

NON-REDUNDANT

A BC

BYPASS INPUT

A-B B-C C-A

UPS INPUT PWR

A-B B-C C-A

380V

380V380V

50.0 Hz

380V

380V380V

50.0 Hz

953A953A

953A

SCCT 1600

UPS INPUT PWR

BATTERY

VOLTS 540

AMPS 15 CHARG

UPS RATINGS

A-B B-C C-A

AP658-71

RATED 50 0 KVA

OUTPUT VOLTAGE

LOAD

A-B B-C C-A

A BC

314 KVA / 251 KW

477A 477A 477A

380V

380V380V

455A455A455A 380V

380V 380V

50.0 Hz

UPS RATINGS

LOAD

BYPASS INPUT

A-B B-C C-A

380V 380V 380V

50.0 Hz

UPS INPUT PWR

380V 380V 380V

A-B B-C C-A

0V 0V 0V

0 Hz

SCCT 1600

OUTPUT VOLTAGE

627 KVA

953A 953A 953A

0 OF 3 MODULES

CONNECTED

NON-REDUNDANT

A BC

Load On Bypass

Static Sw Unable

Module Sum Alm

MOD 1 OFF LINE SUM ALM

MOD 2 OFF LINE SUM ALM

MOD 3 OFF LINE SUM ALM Not OK to Transfer

Static Switch Connected

380V

UPS INPUT PWR

UPS RATINGS

A-B B-C C-A

AP646-84

RATED 37 5 KVA

OUTPUT VOLTAGE

LOAD

A-B B-C C-A

Input Fail

Batt CB Open

MODULE DC BUS

V O LTS 0

AMPS 0

A BC

0 KVA / 0 KW

0A 0A 0A

0V 0V 0V

0 Hz

480V 480V 480V

0A 0A 0A

DISCONTINUED

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40 Operation

3.1.3 Walk-In Display Screen

From the module Master Menu, highlight WALK-IN DISPLAY and then press the Select pad. Note that this

screen is displayed at the UPS modules but is not required at the System Control Cabinet (SCC).

Figure 21 Walk-In Display Screen During Start-Up

The Walk-In Display screen enables the operator to monitor the UPS module DC bus voltage, the input currents,

and the output voltage. This is important during the start-up procedures.

During start-up, the UPS module input circuit breaker is closed and power is applied to the UPS module. The

Walk-In Display screen graphically shows the voltage increasing on the DC bus as the UPS module rectifier

begins to walk-in.

The DC Volts bar gradually moves to the right. After the DC Vo lts bar reaches the 90% level, the UPS module

inverter starts-up and the Output Volts bar also moves to the right. Both the DC Volts and the Output Volts

bars should settle near the 100% line as the UPS module becomes fully energized.

The three Input Amps bars (one for each phase of input current) move to the right during the initial transformer

inrush. They should return to the left after the momentary inrush has subsided, then increase to about 10% as the

DC Volts increase.

Modules equipped with the optional input filter will indicate more than 10% with no connected load.

NOTE

After the critical load is transferred from the bypass line to the UPS modules, the

Input Amps bars continue to indicate the percent of the design input current to the

UPS module rectifier.

If any Input Amps bar differs from the average bar length by more than 10%, call

Liebert Global Services.

DOWN :

SELECT :

MASTER MENU

SELECT :

0% 25% 50% 75% 100%

INPUT AMPS

OUTPUT VOLTS

D.C. VOLTS

DISCONTINUED

PROD UC T

Operation 41

3.1.4 Status Reports Screens

Go to the Master Menu and move the highlighted cursor to STATUS REPORTS. Press the Select button and the

Status Reports screen is displayed.

The Status Report screen is divided into four submenu reports: PRESENT STATUS, EVENT HISTORY,

HISTORY STATUS, and SYSTEM STATUS.

To look at any of the reports, do the following:

1. From the Status Reports screen, press the Up or Down pad to move the highlighted cursor to the desired

selection.

2. Press the Select pad to view the desired report page.

3. Use the Up and Down pads to move through a report that includes several screens (frames).

4. Press the Select pad to exit the report.

5. To return to the Master Menu, return to EXIT and press the Select pad.

Each report screen includes the date, time, and a frame number. The frame number indicates the relationship

sequence of a 4 millisecond time segment. The SCC and each module generate their own frame numbers inde-

pendently. The clock in each module is synchronized to the SCC clock.

Figure 22 Status Reports Screen

NOTE

Each of the four Status Reports can be displayed on a remote terminal. Refer to

3.1.14 - Communication Interfaces.

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

PRESENT STATUS

EVENT HISTORY

HISTORY STATUS

SYSTEM STATUS

EXIT

DISCONTINUED

PROD UC T

42 Operation

Present Status

The Present Status screen shows the current status of the UPS system (SCC) or module. This screen displays any

alarm messages that are present and the values of the metered parameters for each cabinet. Battery values are dis-

played only at the UPS modules.

Each update sequence (every 4 milliseconds) is called a frame. The frame number is displayed in the upper right

corner. The Present Status screen display is updated every two seconds.

Battery Time Remaining (in minutes) is displayed on the module screens during a battery discharge. The value is

on the Battery Volts line in the TIME column (far right side of the screen). For the first two minutes of discharge,

the Rated Time Remaining is displayed. After that, the Calculated Time Remaining is displayed, and updated

every six seconds.

All the information on this screen, including Battery Time Remaining, is available to a local terminal or modem

through the communications ports provided in the Series 600T UPS. Refer to Table 3 in this manual for key-

board commands to use with the communication ports.

Figure 23 Present Status Report Screens, SCC (above) and Module

PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

LOAD KVA

BYPASS VOLTS

END OF REPORT

480

325

480

325

TIME

0:06

LOAD

270

480

325

HERTZ

60.0

EXIT

SELECT :

PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

LOAD KVA

BYPASS VOLTS

END OF REPORT

380

410

380

410

TIME

0:06

LOAD

270

380

410

HERTZ

50.0

EXITSELECT :

PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

BATTERY VOLTS

BATTERY AMPS

INPUT VOLTS

INPUT AMPS

LOAD KVA

END OF REPORT

480

325

480

-645

480

325

TIME

0:09

LOAD

270

480

325

HERTZ

60.0

EXITSELECT :

DISCONTINUED

PROD UC T

Operation 43

Event History

The Event History screen lists the active alarms present in the UPS system (SCC) or modules. This screen also

displays the prior 128 alarm frames, in a first-in first-out (FIFO) sequence, that have taken place along with the

date and the time that each alarm frame occurred. Use the Up and Down pads to look through the different alarm

frames.

Figure 24 Event History Report Screen

PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

LOAD KVA

BYPASS VOLTS

END OF REPORT

380

410

380

410

TIME

0:06

LOAD

270

380

410

HERTZ

50.0

EXIT

SELECT :

PRESENT STATUS MODULE-0 01/12/98 14:06:26 FRAME 35

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

BATTERY VOLTS

BATTERY AMPS

INPUT VOLTS

INPUT AMPS

LOAD KVA

END OF REPORT

380

410

480

-480

380

410

TIME

0:09

LOAD

270

380

410

HERTZ

50.0

EXIT

SELECT :

EVENT HISTORY MODULE-0 01/17/98 15:06:41 FRAME 175

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging Low Batt Warning

NEXT FRAME

PREVIOUS FRAME

EXIT

UP :

DOWN :

SELECT :

DISCONTINUED

PROD UC T

44 Operation

History Status

The History Status screen displays 64 frames, of 4 milliseconds each, from the Present Status screen. Note that

the values for output volts and amps are updated once each millisecond. Alarms are listed in the sequence they

occurred, within 1 millisecond resolution. The frames are stored in a buffer (a computer information storage

technique). The buffer stores the frames in a first-in first-out sequence. As a new frame enters the buffer the old-

est one is released.

When a designated fault occurs (see list below), the buffer stores information for the next 24 frames and then

freezes (stops gathering information). At that time, the History Status screen contains 40 frames before the fault,

the frame when the fault occurred, and 23 frames after the fault. This 64-page report is a very useful diagnostic

tool for the operator or Liebert Global Services. Use the Up and Down pads to view the screens.

Figure 25 History Status Report Screens

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

LOAD KVA

BYPASS VOLTS

480

420

480

420

480

TIMELOAD

349

480

420

480

HERTZ

60.0

NEXT FRAME

PREVIOUS FRAME

EXIT

UP :

DOWN :

SELECT :

HISTORY STATUS MODULE-0 04/10/97 16:49:21 FRAME 36

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Output Ov-volts

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

LOAD KVA

BYPASS VOLTS

380

530

380

530

380

TIMELOAD

349

380

530

380

HERTZ

50.0

NEXT FRAME

PREVIOUS FRAME

EXIT

UP :

DOWN :

SELECT :

HISTORY STATUS MODULE-0 04/10/97 16:49:21 FRAME 36

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Output Ov-volts

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

OUTPUT VOLTS

OUTPUT AMPS

BATTERY VOLTS

OUTPUT VOLTS

OUPUT AMPS

BATTERY AMPS

INPUT VOLTS

INPUT AMPS

OUPUT VOLTS

OUTPUT AMPS

LOAD KVA

480

325

480

325

480

325

480

325

390

-645

480

325

480

325

480

325

480

325

TIME

0:01

LOAD

270

480

325

480

325

480

325

480

325

HERTZ

60.0

NEXT FRAME

PREVIOUS FRAME

EXIT

UP :

DOWN :

SELECT :

HISTORY STATUS MODULE-0 01/17/98 11:21:59 FRAME 100

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging Low Batt Warning

DISCONTINUED

PROD UC T

Operation 45

The alarm conditions that cause the History Status buffer to stop gathering new data are:

Note that the Emergency Off alarm will also freeze the SCC History Status buffer with the Auto Transfer to

Bypass alarm (if the load is on the UPS system when the alarm condition occurs).

The History Status buffer does not resume collecting new frames until the fault is cleared and the Alarm Reset

pad is pressed for 15 seconds (or until the screen clears).

SCC Module

Auto Transfer to Bypass DC Cap Fuse Blown

Output Over-Voltage DC Over-Voltage Shutdown

Output Under-Voltage Inverter Fault

Overload Transfer Low Battery Shutdown

Overload Shutdown

Over-Temperature Timeout

Rectifier Fuse Blown

Reverse Power

DISCONTINUED

PROD UC T

46 Operation

System Status

The System Status screen displays the module Total Operating Hours and the Battery Cycle Monitor.

Battery Cycle Monitor (Module Only)

Selecting the Battery Cycle Monitor gives you access to detailed information about the module’s most recent

battery discharge events. Periodic review of this data can give a good indication of battery performance and

expected life.

Each battery discharge cycle is put into one of four categories, depending on the length of the event:

• 0-30 Seconds Discharge

• 31-90 Seconds Discharge

• 91-240 Seconds Discharge

• Over 240 Seconds Discharge

Each discharge cycle is sorted by time duration and tagged with the following system parameters:

• System time and date

• Event Number

• Duration of cycle (seconds)

• Lowest DC Bus Voltage

• Highest DC Bus Current

• kW carried by the batteries at the start of cycle

• Battery Environment Ambient Temperature (when equipped with optional temperature sensor)

Up to 132 discharge cycle events can be stored at any given time. When the buffer approaches its capacity, a

warning message is broadcast via terminal and modem communication channels and a complete listing of all

records (in order of occurrence) is sent to the terminal port. If a serial printer is attached to the terminal port, the

operator can print a hard copy of the report. If a printer is not available, a terminal emulation program can cap-

ture the report to disk for later review or printing. Once the buffer is filled, new data will replace the old on a

First In, First Out basis as new cycles occur.

To view this data, select the BATTERY CYCLE MONITOR option on the System Status screen. At the next

screen (see Figure 26), you can select either the Battery Cycle Monitoring Summary screen or a screen showing

detailed information on any one of the four categories of discharge (0-30 seconds, 31-90 seconds, 91-240 sec-

onds and Over 240 seconds).

Figure 26 Battery Cycle Monitor Screen

The Summary screen (Figure 27) shows Total Number of Discharge Cycles, Accumulated Battery Time, Accu-

mulated Battery Amp Hours, Accumulated Battery Kilowatt Hours, and Battery Temperature. During a battery

discharge event, the screen changes to show information about the present discharge cycle. The screen displays

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

Enable

EXIT

Battery Cycle Monitor

Battery Temperature

Battery Cycle Monitoring Summary

0-30 Seconds Discharge

31-90 Seconds Discharge

91-240 Seconds Discharge

Over 240 Seconds Discharge

Total Since 02/4/95

...............................................

................................

EXIT

DISCONTINUED

PROD UC T

Operation 47

Active Cycle Time in place of Accumulated Battery Time, and shows Active Battery AH and Active Battery

kWH instead of accumulated values.

Figure 27 Battery Cycle Monitoring Summary Screen

Figure 28 shows a typical detail screen for the 91-240 Seconds Discharge category. This information can be col-

lected remotely, through the optional communications board and modem, by a remote terminal or a personal

computer equipped with a modem and communications program. See 3.1.14 - Communication Interfaces for

more information.

Figure 28 Typical Data on Discharge Cycles of 91 to 240 Seconds Duration During the Recording

Period

NOTE

This information is applicable to systems with separate batteries for each module. If

the modules share a common battery, select one module to do the monitoring and

disregard the other(s).

15 min. 32 sec.

25°C / 77°F

TotalNo.ofCycles.............

Accumulated Battery Time . . . . . . .

AccumulatedBatteryAH ........

Accumulated Battery KWH . . . . . . .

BatteryTemperature............

Battery Cycle Monitoring Summary

EXITSELECT :

EXIT

Event Date Time Duration Min. Volt Max. Amp Start KW Start Temp

15 4/12/95 10:31 235 477 110 70 68

12 3/25/95 20:21 98 479 97 37 65

9 3/13/95 7:35 139 467 173 69 67

5 2/07/95 17:22 199 478 95 40 70

2 11/24/94 12:33 95 477 83 39 69

Total 91-240 se c. Cycl 5

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

DISCONTINUED

PROD UC T

48 Operation

3.1.5 System Configuration Screens

Go to the Master Menu and move the highlighted cursor to SYSTEM CONFIGURATION. Press the Select pad

and the System Configuration screen is displayed.

The System Configuration screen lists parameters that can be changed to adjust the “personality” of your UPS

modules and the SCC to your site requirements. Some of the information displayed is factory set and should only

be changed by Liebert Global Services. Parameters that should be adjusted by the user include date, time, auto

dial number, and modem baud rate.

The System Configuration screen is one of the displays that has controlled access to limit who is able to change

site parameters. This type of screen is called a Security Access screen. This controlled access feature allows any-

one to review the present parameters, but limits access for making changes. When you see Security Access dis-

played on the screen (upper left corner), to make authorized changes you must open the control cabinet door (key

required) and push the Interlock button on the back of the control panel (Figure 11). Close and lock the control

cabinet door after making authorized changes.

Figure 29 SCC System Configuration Screen

Part Number. This is a factory set part number of the UPS cabinet which determines many internal operating

parameters. It cannot be changed.

Order Number. This is a factory set number to identify your particular installation.

System Number. This number is used to identify one or more UPS systems that may be present on one site.

Number of Modules in System. This shows the total number of modules.

NOTE

If you accidentally set a site parameter digit to a wrong value, you must return to the

System Configuration screen and go again to your desired screen.

SYSTEM CONFIGURATION

EXIT

SECURITY ACCESS

02-791112-14

000000

00000

0000000

01/17/96

14:51:59

YES

1600

Part Number .......................................

Order Number ....................................

Site ID Number ..................................

Site TAG Number ..............................

System Number .................................

Number of Modules in System ..........

Date ...................................................

Time ...................................................

Auto Dial ............................................

Max Auto-Rexfer Attempts ................

System Current Rating ......................

System Options

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

DISCONTINUED

PROD UC T

Operation 49

Date

This is the system’s real-time date setting. The system control program sends to each module the date entered at

the System Control Cabinet (SCC). You cannot change the system date from the control panel of a UPS module.

Figure 30 Date Screen

To reset the date, do the following at the SCC.

1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to DATE.

2. Press the Select pad. The Date screen will appear.

3. Press the Select pad to move the arrow to the next digit to the right.

4. When the arrow is on the digit to be changed, press the Up pad to increase the number or the Down pad to

decrease it. Press Select to set the value and move to the next digit.

5. After the correct month/day/year has been set, press the Select pad again to return to the System

Configuration screen.

NOTE

Precise Date and Time functions are required for accurate archive and event history

purposes.

Both the Date and Time can be set from a remote terminal. Refer to 3.1.14 -

Communication Interfaces.

All Liebert Series 600T products can handle dates past the year 2000.

DATE

INCREASE VALUE

DECREASE VALUE

WALK-THRU/ EXIT

UP :

DOWN :

SELECT :

01/17/96

DISCONTINUED

PROD UC T

50 Operation

Time

This is the system’s real-time clock. The system control program sends to each module the time entered at the

System Control Cabinet (SCC).

You cannot change the system time from the control panel of a UPS module.

Figure 31 Time Screen

To reset the time do the following at the SCC:

1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to Time.

2. Press the Select pad. The Time screen will appear.

3. Press the Select pad to move the arrow to the next digit to the right.

4. When the arrow is on the digit to be changed, press the Up or Down pad to increase or decrease the hour/

minute/second number. Press Select to set the value and move to the next digit.

5. After the correct hour/minute/second has been set, press the Select pad again to return to the System

Configuration screen.

NOTE

Precise Date and Time functions are required for accurate archive and event history

purposes.

Both the Date and Time can be set from a remote terminal. Refer to 3.1.14 -

Communication Interfaces.

TIME

INCREASE VALUE

DECREASE VALUE

WALK-THRU/ EXIT

UP :

DOWN :

SELECT :

09:15:00

DISCONTINUED

PROD UC T

Operation 51

Auto Dial

This is a feature that automatically dials (through a customer supplied PC-compatible modem) a pre-pro-

grammed telephone number (up to 12 digits) when specified alarm conditions occur within the UPS system. The

connection for the modem is at the SCC. Automatic dial attempts to the first number are made at periodic inter-

vals for 30 minutes. If unanswered, the system rolls over to the second number and repeats the process until con-

nection is made.

Upon connection, the system transmits data, in RS-232C format, that includes the system identification code, the

present alarm message(s) and the time that the alarm(s) occurred. Refer to 3.1.14 - Communication Interfaces.

Refer to the Special Functions column in Tab le 1 to see which alarm messages will initiate an auto-dial call.

Figure 32 Auto Dial Setting Screen

If the auto-dial numbers were specified at time of order or installation, the numbers are pre-programmed into the

system. However, if the numbers need to be changed, follow the steps listed below to reprogram the auto-dialer

at the SCC.

1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to Auto

Dial.

2. Press the Select pad. The Auto Dial screen will appear.

3. Move to and select the first Auto Dial Number.

4. Press the Select pad to move the arrow to the next digit to the right.

5. When the arrow is on the digit to be changed, press the Up pad to increase the number or press the Down

pad to decrease it. Press Select to set the value and move to the next digit.

6. After all of the changes have been made, press the Select pad again to return to the System Configuration

screen.

7. If required, go to the Second Number screen and enter the correct number.

AUTO DIAL SETTING SCREEN

YES

2400

1 800 555 - 1234

0 000 000 - 0000

xxxxxxxxxxxxxxxxxxx

Enable Auto Dial .....................................

Modem Baud Rate ..................................

Auto Dial Number ...................................

Second Number ...............................

Modem Initialization String .....................

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

EXIT

DISCONTINUED

PROD UC T

52 Operation

Modem Baud Rate

This sets the transmission rate at which the system relays data to a terminal through the modem.

Figure 33 Modem Baud Rate

To change the modem baud rate, do the following at the SCC:

1. From the System Configuration screen, press the Up or Down pad to move the highlighted cursor to Auto

Dial.

2. Move to and select the Modem Baud Rate.

3. Press the Up or Down pad to display the desired baud rate.

4. Press the Select pad to set the baud rate and to return to the System Configuration screen.

AUTO DIAL SETTING SCREEN

YES

2400

1 800 555 - 1234

0 000 000 - 0000

xxxxxxxxxxxxxxxxxxx

Enable Auto Dial .....................................

Modem Baud Rate ..................................

Auto Dial Number ...................................

Second Number ...............................

Modem Initialization String .....................

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

EXIT

DISCONTINUED

PROD UC T

Operation 53

Maximum Auto-Retransfer Attempts

When a UPS output overload condition exceeds a pre-programmed current-versus-time window (based on the

SCC current rating), the UPS automatically transfers the critical load to the bypass line. After the overload condi-

tion has been corrected, the UPS attempts to automatically retransfer the critical load to the UPS output (unless

zero attempts is selected). The Maximum Auto-Retransfer Attempts limits the number of times (0 to 5) that

the UPS attempts to retransfer the load back to the UPS within a one-hour time period.

If more than the selected number of overloads occurs during one hour, the critical load remains on the bypass line

and must be manually retransferred to the UPS system. Note that you should determine the cause of any overload

condition.

Note that automatic retransfers are initiated only if the critical load was transferred to the bypass line because of

a system overload. If an automatic transfer to bypass occurred for any other reason, an automatic retransfer will

not be initiated. Refer to 3.4.3 - Automatic Retransfers to UPS.

Figure 34 Maximum Auto-Retransfer Attempts Screen

To change the Maximum Auto-Retransfer Attempts parameter, do the following at the SCC:

1. From the System Configuration Screen, press the Up or Down pad to highlight Maximum Auto-

Retransfer Attempts.

2. Press the Select pad. The screen above will appear.

3. Press the Up pad to increase the value or the Down pad to decrease it.

4. Press the Select pad to set the value and to return to the System Configuration screen.

MAX AUTO-REXFER ATTEMPTS

UPPER LIMIT

LOWER INPUT

INCREASE

DECREASE

EXIT

UP :

DOWN :

SELECT :

VALUE

DISCONTINUED

PROD UC T

54 Operation

Remote Monitor

The Remote Monitor Panel (optional) displays eight (8) alarms. These alarms are also available for customer use

through a set of contacts on a separate terminal board.

When the New Alarm, System Summary Alarm, or Module Summary Alarm is activated, you can get more

information at the Operator Display Panel or through a remote terminal. Refer to 3.1.14 - Communication

Interfaces.

The following alarms, as well as those listed above, will activate the System Summary Alarm or the Module

Summary Alarm.

SCC and Module Remote Monitor Indications

SCC Remote Monitor Indications Channel Module Remote Monitor Indications

Load On UPS CH1 Output CB Open

Load On Bypass CH2 Battery CB Open

Battery Discharging CH3 Battery Discharging

Low Battery Warning CH4 Low Battery Warning

Overload CH5 Control Failure

Ambient Over-Temp CH6 Ambient Over-Temp

System Summary Alarm CH7 Module Summary Alarm

New Alarm CH8 New Alarm

Other Alarms That Activate Summary Alarms

Other Alarms That Activate

System Summary Alarm

Other Alarms That Activate

Module Summary Alarm

Control Power Fail Blower Failed

Emergency Off Control Power Fail

Module Summary Alarm DC Capacitor Fuse Blown

Output Over/Under Frequency DC Ground Fault

Output Over-Voltage DC Over-Voltage Shutdown

Output Under-Voltage Emergency Off

Overload Transfer Equipment Over-Temperature

Static Switch Unable Inverter Fault

Low Battery Shutdown

Overload

Overload Shutdown

Rectifier Fuse Blown

Reverse Power

DISCONTINUED

PROD UC T

Operation 55

3.1.6 Alarm Limit Settings Screen

Go to the Master Menu and move the highlighted cursor to LIMIT SETTINGS. Press the Select pad and the

Limit Settings screen is displayed.

The Alarm Limit Settings screen has Security Access to enable an authorized Liebert field-service engineer to

adjust the UPS system alarm limit settings.

Figure 35 Module Alarm Limit Settings Screen

Overload Alarm (SCC and modules). This alarm setting initiates an alarm message on the display screen warn-

ing the operator that the UPS system output current has exceeded the specified limit. This condition only acti-

vates an alarm. The UPS does not shut down, but a separate control circuit will transfer the critical load to bypass

if the current and time of the overload condition exceeds system capability.

DC Over-Voltage (modules only). This setting limits the maximum permitted level of the DC bus voltage.

When this setting is exceeded, an alarm indication appears on the module display screen. The UPS module is

taken off-line (the module output circuit breaker is tripped open), and the input and battery circuit breakers trip

open.

Battery Discharging (modules only). When the battery voltage on the DC bus falls below this limit for 5 sec-

onds, a Battery Discharging alarm message is displayed on the module screen. This means that the battery is dis-

charging due to an input voltage sag or interruption, or a module output overload.

Low Battery (modules only). While the battery is discharging, this alarm warns the operator that the Battery

Shutdown level is approaching. This is typically set for a reserve time of approximately five minutes (10 volts

above the 60-Minute Battery Shutdown Voltage), based on full load operation.

Battery Shutdown (15 Minutes) (modules only). When the battery voltage decreases to this limit for five sec-

onds during the first 15 minutes of the discharge, the battery circuit breaker opens to prevent over-discharge.

Note that the rated battery reserve time at your site may be other than 15 minutes.

Battery Shutdown (60 Minutes) (modules only). During extended outages or deep sags of more than 15 min-

utes, the shutdown voltage limit will ramp up gradually to this 60-minute limit to prevent lengthy discharge and

possible battery damage. The battery circuit breaker opens when the battery voltage and the shutdown limit are

equal for five seconds. See the Battery Time screen for more information. Also refer to the battery manufac-

turer’s manual.

Battery Rating (100%) (modules only). This setting is the full load discharge rating of the battery in kilowatts

for the rated backup period. A typical rating might be 500 kW for 15 minutes.

CAUTION

All alarm limit settings are application matched and factory set. They should not

be changed casually. Contact Liebert Global Services for changing the alarm

limit settings.

EXIT

SECURITY ACCESS CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

ALARM SETTINGS

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

Overload Alarm ...............................

DC Over Voltage ...............................

Battery Discharging ...........................

Low Battery .......................................

Battery Shutdown (15 minutes) ......

Upper Point (60 minutes) ......

Battery Rating (100%) .....................

Battery Rating ...................................

104 %

600 VDC

480 VDC

437 VDC

384 VDC

427 VDC

500 KW 15 min

250 KW 45 min

DISCONTINUED

PROD UC T

56 Operation

Battery Rating (modules only). This setting is a battery discharge rating in kilowatts under partial load for an

extended period, typically 60 minutes. The UPS uses the two battery shutdown voltage settings and the two bat-

tery discharge ratings in computing rated and calculated time remaining during a discharge event.

NOTE

The Low Battery alarm setting is designed to be useful at full load battery discharge

rates. It is typically set for 10 volts above the 60-Minute Battery Shutdown voltage, to

provide some measure of warning under all circumstances. If the discharge period

extends past 15 minutes (i. e., the load on the UPS is less than full capacity), the

Battery Shutdown voltage setting is gradually and automatically increased to protect

the batteries from deep discharge. The Low Battery alarm setting is not automatically

increased and should not be relied upon as an accurate indicator of battery time

remaining. Instead, the operator should consult the Battery Time screen or Present

Status screen to see the calculated time remaining based on actual usage during the

discharge period.

DISCONTINUED

PROD UC T

Operation 57

3.1.7 Load Transfer Procedures Screen

Go to the SCC Master Menu and move the highlighted cursor to LOAD TRANSFER PROCEDURES. Note

that this screen is displayed at the System Control Cabinet but is not required at the UPS modules. Press the

Select pad and the Load Transfer Procedures screen is displayed.

The Load Transfer Procedures screen contains instructions to transfer the critical load between the UPS system

and the bypass line. Comparisons of the UPS and bypass voltage, frequency, and phase synchronization are dis-

played along with transfer status messages and an indication of circuit breaker overlap time. The metered param-

eter values on the Load Transfer Procedures screen are updated at half-second intervals.

Refer to 3.3.2 - Load Transfer Procedures for more details.

Figure 36 Load Transfer Procedures Screen

Item 1 - Voltage Comparisons. This chart shows the UPS and bypass voltage and frequency comparisons

between each of the three phases. If the UPS and bypass voltages are not within specified tolerances, a manual

transfer is not permitted and TRANSFER PROHIBIT is highlighted.

The Voltage Adjust knob (push-to-turn), located on the SCC Operator Control Panel (Figure 10), is used to

match the UPS output voltage to the bypass voltage. When the UPS and bypass voltages match within the spe-

cific tolerance, a manual transfer is possible and OK TO TRANSFER is highlighted.

Item 2 - Synchronization. This display shows the phase synchronization between the UPS output and bypass

power. If the phase displacement is outside of the tolerance, a manual transfer is not permitted and TRANSFER

PROHIBIT is highlighted.

During normal operation, the synchronization display should read UPS LEAD from zero to 4 degrees.

Item 3 - Status Messages. Three messages are constantly displayed here. Only the active message is high-

lighted. If TRANSFER PROHIBIT is highlighted, manual transfers/retransfers cannot be performed, and auto-

matic retransfers will not be initiated.

Item 4 - Manual Transfer Instructions. These instructions assist the operator in transferring the critical load

between the UPS system and the bypass line.

If the load is on the bypass line, step 2 on the screen will instruct you to press the UPS and Control Enable but-

tons to retransfer the load from the bypass line to the UPS system.

CAUTION

The UPS output voltage responds very slowly to inputs from the Voltage Adjust

knob. Make small adjustments and wait several seconds each time for voltage to

stabilize before continuing.

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

LOAD KVA

BYPASS VOLTS

380

530

380

530

380

TIMELOAD

349

380

530

380

HERTZ

50.0

NEXT FRAME

PREVIOUS FRAME

EXIT

UP :

DOWN :

SELECT :

HISTORY STATUS MODULE-0 04/10/97 16:49:21 FRAME 36

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Output Ov-volts

OUTPUT VOLTS

OUTPUT AMPS

OUTPUT FREQUENCY

OUTPUT VOLTS

OUTPUT AMPS

BATTERY VOLTS

OUTPUT VOLTS

OUPUT AMPS

BATTERY AMPS

INPUT VOLTS

INPUT AMPS

OUPUT VOLTS

OUTPUT AMPS

LOAD KVA

380

410

380

410

380

410

380

410

390

-583

380

410

380

410

380

410

380

410

TIME

0:01

LOAD

270

380

410

380

410

380

410

380

410

HERTZ

50.0

NEXT FRAME

PREVIOUS FRAME

EXIT

UP :

DOWN :

SELECT :

HISTORY STATUS MODULE-0 01/17/98 11:21:59 FRAME 100

ORDER - 000000 SITE ID - 00000 SITE TAG - 0000000

**** ACTIVE ALARMS **** Batt Discharging Low Batt Warning

TRANSFER PROHIBIT

UPS LEAD = 2 Deg

UPS -

BYPASS -

480480

480481

B-CA-B

VOLTAGE COMPARISON

SELECT : MASTER MENU

OK TO TRANSFER

+30

ON UPS

60.0 Hz

479

C-A FREQUENCY

MANUAL

TRANSFER INSTRUCTIONS

1. Adjust the UPS voltage until it equals the

bypass voltage with the VOLTAGE ADJUST pot.

2. If the OK TO TRANSFER message is highlighted,

simultaneously press the BYPASS and CONTROL ENABLE

buttons.

3. Verify that the transfer was successful by checking the

breaker status on the "MONITOR/MIMIC" screen.

4. Press the ALARM RESET button to clear alarms which

are no longer active

SYNCHRONIZATION

60.0 Hz

0-30

480

DISCONTINUED

PROD UC T

58 Operation

3.1.8 Start-Up Procedures Screen

From the SCC Master Menu, move the highlighted cursor to START-UP PROCEDURES. Press the Select pad

and the SCC Start-Up Procedures screen is displayed.

This screen contains the steps you must follow to start-up the UPS system. The instructions are listed so you can

review them prior to performing the start-up.

Figure 37 SCC Start- Up Procedures Screen

Prior to this procedure, supply power to the critical load through the bypass line. Start-up each UPS module

according to the module start-up procedures. You can then transfer the load from bypass to the UPS system per

instructions on the SCC Load Transfer Procedures Screen.

Refer to 3.3.1 - Start-Up Procedure for more details.

NOTE

If the system was shut down in response to an “Emergency Off” signal (typically

because of a load fault), there may be alarm messages on the LCD screen that

describe system conditions before (or at the time of) the shutdown. Some or all of the

alarm conditions may have already been resolved. To clear these alarm messages,

make sure the critical load is on bypass power and turn off the control power (see

Figure 8 and Figure 9). Wait at least ten minutes for the control power circuitry to

completely de-energize. After ten minutes, turn control power back on and follow the

start-up procedures on the UPS and SCC screens.

START-UP PROCEDURES

1. Wait approximately two (2) minutes before attempting any other action .

2. Select "SYSTEM CONFIGURATION" screen to verify that the correct model number is

displayed.

3. Go to the modules(s) and follow the module "STARTUP PROCEDURES".

4. Select "MONITOR/MIMIC" screen, verify that the output voltages are at the

proper nominal level and correct number of modules online is displayed.

5. If the bypass or static switch breakers are open, refer to Start-up Procedures

in the UPS manual for instructions on closing these breakers.

6. System is now ready to assume load. Select "LOAD TRANSFER PROCEDURES"

screen for this procedure.

MASTER MENU

SELECT :

DISCONTINUED

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Operation 59

From the module Master Menu, move the highlighted cursor to START-UP PROCEDURES. Press the Select

pad and the module Start-Up Procedures screen is displayed.

This two-page screen contains the steps you must follow to start-up each UPS system. The instructions are listed

so you can review them prior to performing the start-up.

Figure 38 Module Start- Up Procedures Screen

Prior to this procedure, supply power to the critical load through the bypass line (at the SCC). When you close

the UPS module input breaker, power is provided to the UPS rectifier. The module DC bus voltage ramps up to

the nominal battery voltage and the UPS inverter turns on when the DC bus reaches the proper voltage. You can

then close the battery circuit breaker (MBD) and the UPS module output circuit breaker to place the UPS module

on-line.

Refer to 3.3.1 - Start-Up Procedure for more details.

START-UP PROCEDURES

1. Verify that the control power is applied to the system control cabinet (check the display

on the system control cabinet).

2. Wait approximately two (2) minutes before attempting any other action .

3. Select "SYSTEM CONFIGURATION" screen to verify that the correct model is

displayed.

4. Select "WALK-IN" screen and do the following:

a) Close module input circuit breaker. Verify that the DC voltage bar on

the display begins to gradually move to the right and the AC input

current bars do not move to the right more than 10% (40% for modules

with input filters) after the transformer inrush has subsided.

MASTER MENU

DOWN :

SELECT :

START-UP PROCEDURES (Cont'd)

b) Verify that the output voltage bar moves to the right after the DC

bus bar has reached the 90% point. Both bars should settle near

their respective 100% levels.

c) If anything happens on the display not mentioned in (a) or (b),

immediately open the module input circuit breaker and investigate.

5. If step 4 is successful, select "MONITOR/MIMIC" screen and verify module

DC bus and output voltages are at proper nominal level. If so, close

module battery circuit breaker.

6. If no alarms are present on the "MONITOR/MIMIC" screen, the module may be

placed online by closing the module output breaker.

FIRST PAGE

MASTER MENU

UP :

SELECT :

DISCONTINUED

PROD UC T

60 Operation

3.1.9 Shutdown Procedures Screen

Go to the SCC Master Menu and move the cursor to SHUTDOWN PROCEDURES. Press the Select pad and

the SCC Shutdown Procedures screen is displayed.

This screen contains the steps you must follow to perform a controlled shutdown of the UPS system. The instruc-

tions are listed so you can review them before performing the controlled shutdown.

Figure 39 SCC Shutdown Procedures Screen

To perform the shutdown procedure, transfer the critical load from the UPS system to the bypass line. Shut down

each UPS module according to the module Shutdown Procedures.

Refer to 3.3.3 - Shutdown Procedures for more details, including emergency shutdowns.

SHUTDOWN PROCEDURES

1. If load is not already being supplied by the bypass line, select the

"LOAD TRANSFER PROCEDURE" screen and follow the instructions to transfer

the load to bypass.

2. Go to the modules(s) and follow the module "SHUTDOWN PROCEDURES."

3. Press the ALARM RESET button to clear alarms which are no longer active.

4. If necessary for maintenance purposes, open the static switch disconnect

circuit breakers.

5. Wait approximately two (2) minutes before attempting any other action .

DISCONTINUED

PROD UC T

Operation 61

Go to the module Master Menu and move the cursor to SHUTDOWN PROCEDURES. Press the Select pad

and the module Shutdown Procedures screen is displayed.

This two-page screen contains the steps you must follow to perform a controlled shutdown of each UPS module.

The instructions are listed so you can review them before performing the controlled shutdown.

Figure 40 Module Shutdown Procedures Screen

To perform the shutdown procedure, transfer the critical load from the UPS system to the bypass line (at the

SCC). Then trip open the UPS module output and battery circuit breaker (MBD), and manually open the UPS

module input circuit breaker. The Control Power switch may be turned Off if required for maintenance proce-

dures.

Refer to 3.3.3 - Shutdown Procedures for more details, including module shutdowns for service and emergency

shutdowns.

SHUTDOWN PROCEDURES

MASTER MENU

1. If load can not be supported by the remaining modules when this module

is taken off line, go to the system control cabinet and select the "LOAD

TRANSFER PROCEDURES" screen. Follow the instructions to transfer

to bypass.

2. Open the module output breaker by simultaneously pressing the OUTPUT TRIP

and CONTROL ENABLE pushbuttons.

3. Open the module battery breaker by simultaneously pressing the BATTERY TRIP

and CONTROL ENABLE pushbuttons.

4. Manually open the input breaker by moving the handle to the OFF position.

DOWN :

SELECT :

FIRST PAGE

MASTER MENU

5. Verify breaker status on the "MONITOR / MIMIC" screen.

6. If necessary for maintenance purposes, turn the control power switch (fuse

disconnect on some models) to the OFF position.

7. Wait a minimum of two (2) minutes before attempting any other action.

UP :

SELECT :

SHUTDOWN PROCEDURES (Cont'd)

DISCONTINUED

PROD UC T

62 Operation

3.1.10 Battery Time Screen (Module Only)

At the Master Menu, move the highlighted cursor to BATTERY TIME. Press the Select pad and the Battery

Time screen is displayed.

When AC power is not available to the UPS module, the UPS inverter uses DC power from the battery to supply

the critical load. This screen helps the operator assess his power resources to determine if and when the critical

load shutdown procedures need to be started.

The Battery Time screen is a line graph that tracks the present battery voltage versus the elapsed time that the

battery has been discharging (Figure 41). As the battery voltage decreases, the line representing it moves closer

to intersecting the line that represents the battery shutdown voltage. When the battery starts to discharge, the

screen displays a 15-minute graph. If the battery has been providing power for more than 15 minutes, the screen

displays a 30-minute graph. If battery power is still available after 30 minutes, a 60-minute graph is displayed

(Figure 42).

Figure 41 Battery Time Screen Example - 15 Minute Discharge

The screen also displays alarm messages (Battery Discharging, Low Battery Warning, and Battery Shutdown)

and a set of five parameters that inform the operator of battery condition and time remaining. The five parameters

describing battery resources are:

• Rated Total Time, in hours and minutes, is the amount of battery backup time that should be available under

full rated load, based on system design.

• Rated Time Remaining is the Rated Total Time less the duration of the present discharge event.

• Calculated Total Time is an estimate of the total battery backup time available, based on the initial battery

condition and actual performance while powering the connected load during the discharge event.

• Calculated Time Remaining is a real-time estimation of battery time remaining— with the actual connected

load—before battery voltage drops to the Battery Shutdown setpoint.

• Battery Charge is the approximate percentage of total designed ampere hours of battery capacity presently

available based on recharge/discharge activity.

Values for Calculated Total Time and Calculated Time Remaining will appear on the screen approximately two

minutes after the beginning of the discharge event. Calculated Time Remaining also appears on the Present Sta-

tus Report screen. Both Calculated Total Time and Calculated Time Remaining will be updated every six sec-

onds, reflecting actual load changes and battery condition. When the Calculated Times become available, they

will be displayed in place of the Battery Discharging message on this screen.

NOTE

If the UPS modules connect to independent battery plants, consult all the individual

module screens to get the complete picture. If the modules share a common battery,

select one module to do the monitoring and disregard the others.

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Time (Minutes)

340

360

380

400

420

440

460

480

500

VDC

Battery Shutdown = 384 Rated Time (Hrs:Min)

Total 00:10 Remain 0:00

Battery Charge = 5%

SELECT : MASTER MENU

Low Battery Warning

Calculated Time (Hrs:Min)

Total 00:15 Remain 0:01

DISCONTINUED

PROD UC T

Operation 63

Figure 42 Battery Time Screen Example - 45 Minute Discharge

The Battery Time Remaining graph and the Calculated times are extremely helpful to the operator who has the

discretionary authority to order load-shedding activities. The Series 600T automatically samples battery voltage

and load current and recomputes every six seconds. This gives the operator fast and accurate feedback on efforts

to extend battery time remaining by shutting down non-critical loads.

The Series 600T dynamically adjusts the Battery Shutdown voltage based on battery characteristics and the

length of the current discharge event. If a discharge event extends past 15 minutes (i.e., the load is less than the

full design rating), the Battery Shutdown voltage setting is gradually and automatically increased, to protect the

batteries from deep discharge.

When the battery voltage decreases to a preset limit (see 3.1.6 - Alarm Limit Settings Screen), the Low Battery

Warning alarm message appears on the display screen. This warns the operator that the battery voltage is

approaching the Battery Shutdown level—about five minutes of time remaining at full rated load.

If the battery discharges to the Battery Shutdown level, represented by the lower line on the Battery Time screen,

the battery and input circuit breakers trip open and the UPS module is shut down. This protects the battery from

being damaged by an extended deep discharge.

NOTE

While every effort has been made to make the Rated and Calculated Time Remaining

values as accurate as practical, these values must be regarded as approximations. At

the beginning of the discharge cycle, the Calculated times could be off by as much as

±20% due to such variables as battery initial charge, age of battery, and the

subsequent load-shedding activities of the operator. Within a few minutes, however,

these calculations should settle into their design accuracy of ±10%, with the end-of-

discharge tolerance being +0, -10% of actual observed time. In addition, the

operator can adjust the settings affecting Rated Total Time after gaining experience

with the actual battery and connected load.

NOTE

The Low Battery alarm setting is designed to be useful at full load battery discharge

rates. Unlike the Battery Shutdown voltage, the Low Battery alarm setting is not

automatically increased and should not be relied upon as an indicator of battery time

remaining. Instead, the operator should consult the Battery Time screen or Present

Status screen to see the Calculated Time Remaining based on actual usage during the

discharge period.

0 10 20 30 40 50 60

Time (Minutes)

340

360

380

400

420

440

460

480

500 VDC

Battery Shutdown = 417

Battery Charge = 3%

Total 00:45 Remain 0:01

Rated Time (Hrs:Min)

Total 00:25 Remain 0:00

SELECT : MASTER MENU

Low Battery Warning

Calculated Time (Hrs:Min)

DISCONTINUED

PROD UC T

64 Operation

Figure 43 Range of Values for Calculated Battery Times

If the Battery Time screen is displayed while the battery is not discharging, it will display the present Battery

Charge percentage and the results of the previous discharge event.

The Series 600T records information about each discharge event. This data can be reviewed on the Battery Cycle

Monitor screen, as described in 3.1.4 - Status Reports Screens.

CAUTION

When battery shutdown occurs, no power will be supplied to the critical load

unless power is available through the bypass line from the utility source (or from

an engine generator set). If you anticipate a battery shutdown (and an engine

generator set is not available), either transfer the load to bypass (if available) or

perform a controlled shutdown of the critical load.

NOTE

1. During initial UPS start-up, the Battery Charge will display 100%, even though

actual state of charge may be slightly less. It will normally take three to four days

of operation to completely charge the battery. After the battery is fully charged

the first time, Battery Charge will be an accurate indication of battery status.

2. If Calculated Time Remaining is less than Rated Time Remaining, a battery

problem may be indicated. Battery maintenance personnel should thoroughly

examine the battery plant for factors that may reduce battery performance, such

as:

• Age of battery

• Excessive battery discharge/recharge cycles

• Bad or weak cells

• Low acid levels in flooded cells

• Loose electrical connections

• Ambient temperature extremes

• Dirty battery jar covers.

3. If the battery plant has been thoroughly examined for proper maintenance and

condition, and the Calculated value is still less than 80% of Rated value, contact

Liebert Global Services.

2.5 5 7.5 10 12.5 15 17.5 20 22.5 25

Elapsed Time (Minutes)

Calc ulated Tim e Re m aining

Upper Limit A ctual Lower Limit

DISCONTINUED

PROD UC T

Operation 65

3.1.11 Meter Calibration Screen

Go to the Master Menu and move the highlighted cursor to METER CALIBRATION. Press the Select pad and

the Meter Calibration screen is displayed.

The Meter Calibration screen enables a Liebert field-service engineer to adjust the calibration of the UPS

metered functions at each cabinet. Access to these settings is limited by the Security Access control.

Figure 44 Meter Calibration Screen

NOTE

Bypass Volts are calibrated only at the System Control Cabinet (SCC). Input Amps,

D.C. Volts, and D.C. Amps are calibrated only at the UPS modules.

CAUTION

Meter calibrations are factory set and should not require adjustment. Contact

Liebert Global Services for meter calibration.

WARNING

DO NOT ATTEMPT TO CALIBRATE METERS WITHOUT ADEQUATE

TRAINING. METER CALIBRATION REQUIRES SPECIAL TEST

EQUIPMENT, ACCESS TO TEST POINTS IN SENSITIVE CIRCUITRY,

AND EXPOSURE TO HAZARDOUS VOLTAGE.

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

PHASE A-B

PHASE B-C

PHASE C-A

PHASE A

PHASE B

PHASE C

D.C. VOLTS

D.C. AMPS

OUTPUT VOLTS

OUTPUT AMPS

SECURITY ACCESS

INPUT VOLTS

INPUT AMPS

PHASE A-B

PHASE B-C

PHASE C-A

PHASE A

PHASE B

PHASE C

METER CALIBRATION

DISCONTINUED

PROD UC T

66 Operation

3.1.12 Battery Equalize Screen

Go to the Master Menu and move the highlighted cursor to BATTERY EQUALIZE. Press the Select pad and

the Battery Equalize screen is displayed.

The Battery Equalize screen enables the operator to adjust the battery equalize time. It is also used to choose

between auto and manual battery equalize recharging modes. Note that AUTO MODE can be selected only from

the System Control Cabinet (SCC). Selections made at the SCC override previous selections made at the UPS

modules.

When the input utility power is interrupted, the battery supplies DC power to the UPS module inverters so there

is no interruption of power to the critical load. When the AC input power is restored, the battery equalize

recharging circuit can be activated automatically or manually to increase the module rectifier/charger output

voltage to recharge the battery. The battery equalize circuit may also be manually activated at any time during

normal float (constant) voltage operation. The equalizing time can be adjusted from 0 to 72 hours.

Figure 45 Battery Equalize Screen

EQUALIZE TIME PERIOD. This selection permits the operator to adjust the battery equalize time in one hour

increments from 0 to 72. The battery equalize time must be greater than zero for the battery to begin recharging

in both the AUTO and the MANUAL modes. This period is set by use of the Up/Down pads and Select pad.

When the battery is at full voltage (not being recharged), this selection reads EQUALIZE TIME PERIOD

(hrs). When the battery is recharging, this selection reads EQUALIZE TIME REMAINING (hrs). After the

equalize recharge time has expired, the indication returns to the preset equalize time.

STOP EQUALIZE CHARGE. This selection lets the operator halt the equalizing charge to the battery at any

time, whether the circuit was activated automatically or manually.

MANUAL MODE. This mode enables the operator to manually initiate a battery equalize charge to raise the DC

bus voltage to correct a non-uniformity in the individual cell voltages or specific gravity readings.

AUTO MODE (SCC only). When the battery recharge control logic is in the AUTO MODE, the UPS module

battery chargers attempt the equalization process only if the EQUALIZE TIME PERIOD is greater than zero,

the battery voltage has been at or below the Battery Discharging alarm limit for longer than 30 seconds, and the

battery breakers (MBD) are closed.

CAUTION

Do not use the Battery Equalize mode if you have valve-regulated, sealed-cell

(maintenance-free) batteries. Refer to your battery manufacturer’s manual.

EXIT

SECURITY ACCESS

BATTERY EQUALIZE RECHARGING

YES

EQUALIZE TIME PERIOD (hrs.) ...........

STOP EQUALIZE CHARGE ...................

MANUAL MODE .....................................

AUTO MODE ..........................................

MANUAL / RESET TO AUTO MODE ......

CURSOR UP

CURSOR DOWN

CHOOSE

UP :

DOWN :

SELECT :

DISCONTINUED

PROD UC T

Operation 67

3.1.13 Alarm and Status Messages

Module Status Messages

The module status messages indicate how many UPS modules are included in the system and the present status

of each module.

The following status messages may appear in the module status area.

1. MOD N. A module status message line is displayed for each UPS module in the system. Up to six (6)

modules may be included in a multi-module system. The N in the message will indicate a specific UPS

module number, 1 through 6.

2. ON LINE. The UPS module output circuit breaker is closed and power from the module is available to the

SCC. The module output is sharing the critical load if the UPS Output Breaker is closed.

3. OFF-LINE. The UPS module output circuit breaker is open. More specific alarm messages are displayed at

the UPS module.

4. SUM ALM. The Module Summary Alarm has been activated by one of the alarm messages listed in two

tables—SCC and Module Remote Monitor Indications and Other Alarms That Activate Summary

Alarms—in 3.1.5 - System Configuration Screens. The specific alarm message is displayed at the UPS

module.

5. COM FAIL. The UPS module is not communicating with the SCC. This could mean loss of power to the

UPS module controls, a disconnected cable, or a control logic failure (detected by watchdog timer. Call

Liebert Global Services if you require assistance. To resume communication after control power is restored,

sequence display to Master Menu.

Figure 46 SCC Status and Alarm Message Areas

UPS RATINGS

LOAD

Byp Not Avail

Static Sw Unable

Module Sum Alm

UPS INPUT PWR

BYPASS INPUT

A-B B-C C-A

0V 0V 0V

0 Hz

0V 0V 0V

A-B B-C C-A

Not OK to Transfer

Static Switch Connected

MOD 1 ON LINE SUM ALM

MOD 2 ON LINE SUM ALM

MOD 3 ON LINE SUM ALM

A-B B-C C-A

480V 480V 480V

60.0 Hz

SCCT 1600

OUTPUT VOLTAGE

627 KVA / 502 KW

755A 755A 755A

3 OF 3 MODULES

CONNECTED

REDUNDANT

A BC

Time To Overload

Transfer: XXXX SEC

LOAD BLOCK

MESSAGES

ALARM

MESSAGES

MODULE STATUS

MESSAGES

SYSTEM STATUS

MESSAGES

DISCONTINUED

PROD UC T

68 Operation

System Status Messages

The system status messages indicate whether the static bypass switch is connected or disconnected, through the

manually operated Static Switch Disconnects (see Figure 9). The status messages also advise the operator when

a transfer or retransfer between the UPS system and bypass line is permitted, based on matching voltage, fre-

quency, and phase.

The following status messages may appear in the system status area.

1. Static Switch Connected. The static switch is connected (the disconnect switches are closed—ON) and is

ready provide a current path from the bypass input to the load.

2. Static Switch Disconnected. The static switch is disconnected (the disconnect switches are open—OFF) for

maintenance procedures.

3. OK to Transfer. The UPS system voltage, frequency, and phase match the bypass line. This means that a

transfer between the bypass line and the UPS system is permitted.

4. Not OK to Transfer. Either the UPS or bypass voltage, frequency, or phase is not within the specified

limits or the static bypass switch is not available. Therefore, manually initiated transfer between the bypass

line and the UPS system is not permitted. Emergency or overload transfer to bypass may still be available

provided the “static switch unable” alarm is not indicating.

Load Block Messages

Status messages in the Load block indicate how many modules are in the system, how many modules are ON

LINE, and whether the system is operating in the redundant mode.

The following status messages may appear in the load block.

1. N OF X MODULES CONNECTED. The number N is the number of UPS modules ON LINE. This means

the module output circuit breaker is closed. X is the number of UPS modules in the system (connected to this

SCC). This number is set from the System Configuration screen.

2. REDUNDANT. The capacity of the UPS modules ON LINE is sufficient to supply the critical load even if

one module is taken OFF LINE. The critical load will remain on the UPS system if one module goes OFF

LINE.

3. NON-REDUNDANT. The critical load will be transferred to bypass if one module goes OFF LINE, and

you must transfer the load to bypass in order to perform maintenance on any UPS module.

4. TIME TO OVERLOAD TRANSFER. During an overload condition, the time remaining before transfer

(in seconds) is displayed at the bottom of the load block. At each Module (MMU), the message is Time to

Overload Shutdown.

DISCONTINUED

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Operation 69

Alarm Messages

The alarm message area displays the alarm conditions that are present within the UPS system. Alarm messages

are displayed in flashing reverse video. During normal operation no alarm messages should be present. Up to

four messages are displayed. To see if any additional alarm conditions are present in the UPS system, display the

Present Status screen on the control panel.

Table 1 is a complete list of all alarm messages and corrective actions, if any.

The first column lists the alarm message, with related alarms grouped together.

The third column indicates which special functions (if any) are initiated by the alarm.

D- the alarm initiates an auto-dial call through a user-provided modem to a remote terminal.

E- message displayed only on Status Report screens including Event History.

F- the alarm freezes the History Status Report memory buffer in the cabinet where the alarm is displayed.

Pressing the Alarm Reset pad for 15 seconds will unfreeze the memory buffer.

L- the alarm latches the displayed alarm message. Some alarm conditions are temporary (transient) and

may not last long enough to be noticed. Latching the display (keeping it on) lets you know that an alarm con-

dition has occurred. A latching display alarm remains on the display screen until the alarm condition is

removed and the Alarm Reset pad is pressed.

R- the alarm is displayed on an (optional) Remote Monitor Panel. This information is also available for

customer use through a set of contacts on a separate terminal board.

S- the alarm initiates a summary alarm at the Remote Monitor Panel and at the SCC.

The fourth column provides an explanation of the alarm condition, the critical bus status, and the corrective

actions, if any, to remedy the alarm.

Abbreviations Used in Alarm Messages

Auto Automatic

Avail Available

Batt Battery

Byp Bypass

Cap Fuse Capacitor Fuse

Cont Power Control Power

Equip Equipment

H/W Hardware

Inv Fuse Inverter Fuse

OF/UF Over/Under Frequency

Ov-temp Over-Temperature

O-volt Over-Voltage

O-volts Over-Voltage

Ph Seq Phase Sequence

Rect Fuse Rectifier Fuse

Rexfer Retransfer

Shutdn Shutdown

Static Sw Static Switch

Un-volts Under-Voltage

Xfer Transfer

DISCONTINUED

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70 Operation

Table 1 Alarm Messages - Meaning and Corrective Action

Alarm

Message

Cabinet

Location

Special

Functions

Meaning and

Corrective Action in Brackets [ ]

AC INPUT

Input Fail MMU — The rectifier input line voltage is outside of specified limits or the

input circuit breaker is opened while the battery circuit breaker

remains closed. The battery supplies power to the critical load

through the UPS inverter.

DC BUS

DC Ground Fault MMU L, S Either the positive (+) or negative (-) DC bus is grounded. No transfer

or shutdown occurs.

[Contact Liebert Global Services at once. Do not attempt to locate or

repair the fault.]

DC Capacitor

Fuse Blown

MMU D, F, S At least one DC capacitor fuse has opened. The UPS module is

taken off-line and the input and battery circuit breakers trip open.

[Contact Liebert Global Services at once. Do not attempt to reset the

circuit breakers.]

Battery CB Open MMU R, S The module battery circuit breaker (MBD) is open. This circuit

breaker can be opened either manually or automatically in a UPS

shutdown procedure. If the UPS is operating with this breaker open,

the critical load is not protected from loss of the utility source

power.

[After AC power is restored and the DC bus is at 100% operating

voltage, manually close the battery circuit breaker so the rectifier can

charge the battery.]

Battery

Discharging

MMU R, S The battery is discharging. This occurs whenever the battery

supplies power to the load for more than 5 seconds because of input

power failure, a rectifier problem, or an overload condition. If the

input power or a source of auxiliary power is restored to the UPS

module, the UPS automatically returns to normal operation.

[Watch the battery voltage carefully. Reduce the load (begin

controlled shutdown) to extend the battery back-up time. Reset the

UPS alarms after the input power is restored. The message clears

after 30 seconds.]

Low Battery

Warning

MMU R, S The battery voltage is approaching the minimum discharge voltage

(approximately 5 minutes remaining).

[Complete the controlled shutdown of the critical load. Reset the

alarms if the input power is restored before shutdown.]

Low Battery

Shutdown

MMU D, F, L, S The battery voltage has decreased to the minimum discharge value.

The UPS module is taken off-line (no power to the critical load)

and the battery and input circuit breakers trip open.

[Perform a UPS system start-up procedure when AC power

becomes available.]

DC Over-Voltage

Shutdown

MMU D, F, L, S The maximum preset value of the DC Bus voltage has been

exceeded. The UPS module is taken off-line and the input and

battery circuit breakers trip open.

[Contact Liebert Global Services at once. A fault may have occurred

within the UPS. Do not attempt to reset the circuit breaker.]

BYPASS

Load On Bypass SCC D, E, F The critical load is being supplied power from the bypass line, and is

therefore exposed to utility power disturbances.

[Clear all of the alarms before attempting to retransfer the load from

the bypass line to the UPS.]

Table 1 Abbreviations

D = auto-dial; L = latches

E = reports only; R = remote

F = freezes; S = summary

D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs

D# = auto-dial initiated through Module N (1-6) off-line

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Operation 71

BYPASS (Contʼd.)

Auto Transfer to

Bypass

SCC D, E, F The critical load has been automatically transferred to the bypass

line.

[Use the History Status screen to determine the cause for the

transfer. Clear all of the alarms before attempting to retransfer the

load from bypass to UPS.]

Auto Retransfer

Primed

SCC — An automatic retransfer will be initiated when the OK to Transfer

condition has been present for 10 seconds, if the overload has

dropped below 100% of the rated SCC current and if enough UPS

modules are on-line.

Manual Reset/

Retransfer

SCC — A manual retransfer is required. Either a system overload condition

has lasted more than 5 minutes, or no more auto-retransfer attempts

are available. Note that this alarm is only used if auto-retransfer

attempts are enabled.

[Perform a manual retransfer if all necessary conditions are present.]

Static Switch

Unable

SCC S The UPS output is not synchronized to the bypass power source.

The static bypass switch is disconnected, or it has failed internally.

[Emergency and overload transfer to the bypass source is not

available. Manually set the Static Switch Disconnects to ON (closed)

if the static switch is disconnected. If the alarm conditions are

automatically corrected, reset the alarm to clear it. Contact Liebert

Global Services if the alarm stays on.]

Bypass Not

Available

SCC — The bypass power source voltage is not within specifications.

[Check the bypass power source.]

Bypass Phase

Sequence Wrong

SCC — The power conductors on the bypass line are not wired to the UPS in

the required sequence. This alarm should appear only during initial

start-up or after a repair to the source power system.

[Disconnect power from the bypass line and correct the wiring. A

Liebert Global Services representative must be present during initial

start-up of your UPS System.]

UPS SYSTEM

Input Current

Unbalanced

MMU E At least one input phase differs from the average current by 10% or

more for four (4) hours. Contact Liebert Global Services. If the

condition persists, transfer the load to the bypass line.

Control Power

Fail

SCC

MMU

L, S

L, R, S

The logic control power supply from the UPS output is not operating

properly. The UPS module continues operating but will shut down if

the input power fails. The SCC continues operating but will shut

down if the bypass power fails. Contact Liebert Global Services

immediately.

Output Over/

Under Frequency

SCC L, S Output frequency differs from the nominal (60 Hz) by more than 0.5

Hz. No transfer or shutdown occurs.

[Contact Liebert Global Services at once.]

Output Under-

Voltage

SCC D, F, L, S The UPS system output voltage is under the minimum (-12%)

deviation from nominal. The load automatically transfers to the

bypass line.

[If the alarm condition is no longer present, reset the alarm and

retransfer the load from bypass to UPS. Contact Liebert Global

Services if alarm persists.]

Output Over-

Voltage

SCC D, F, L, S The UPS system output voltage is above the maximum (+10%)

deviation from nominal. The load automatically transfers to the

bypass line. All UPS modules are taken off-line and are shut down.

[Contact Liebert Global Services at once. Do not attempt to reset

circuit breakers.]

Table 1 Alarm Messages - Meaning and Corrective Action (continued)

Alarm

Message

Cabinet

Location

Special

Functions

Meaning and

Corrective Action in Brackets [ ]

Table 1 Abbreviations

D = auto-dial; L = latches

E = reports only; R = remote

F = freezes; S = summary

D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs

D# = auto-dial initiated through Module N (1-6) off-line

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72 Operation

UPS SYSTEM (Contʼd.)

Overload SCC

MMU

R, S

The UPS output current exceeds the rated system load current. This

condition causes an alarm only, the UPS does not shut down.

[Determine cause of the overload. Reduce the load until the overload

condition is corrected. Reset the UPS alarm.]

Overload Transfer SCC D, F, L, S The load on the UPS has exceeded the current versus time window

of system overload capacity. The UPS system transfers the load to

bypass.

[Reduce the load. If the system does not initiate an automatic load

retransfer, manually retransfer the critical load from the bypass line

to the UPS. Reset the alarm.]

Module Summary

Alarm

SCC S

R (MMU)

An alarm message (see lists in SCC and Module Remote Monitor

Indications and Other Alarms That Activate Summary Alarms in

3.1.5 - System Configuration Screens) or the watchdog timer has

activated the Module Summary Alarm.

[Clear alarm conditions, if possible.]

Module N Off Line SCC D

R (MMU)

The output circuit breaker of Module N is open. The number N will

identify the module (1 through 6).

[Review active alarms at Module N and clear alarm conditions, if

possible.]

Inverter

Nonsynchronized

MMU — Inverter output is not synchronized with the UPS system critical bus.

This also means the output circuit breaker is open and should not be

closed until the output is in sync. This condition may correct itself. If

not, shut down the UPS module and then perform a start-up

procedure.

[Contact Liebert Global Services if condition persists.]

Overload

Shutdown

MMU D, F, L, S The UPS output current has exceeded 175% of the rated full load or

the overload capacity has been exceeded. The UPS module is taken

off-line and shut down.

[Contact Liebert Global Services at once. Do not attempt to reset

circuit breakers.]

Reverse Power MMU D, F, L, S Excessive reverse power flow from the critical bus into the UPS

inverter has occurred, probably because of low inverter output

voltage or a phase mismatch. The UPS module is taken off-line and

is shut down.

[Contact Liebert Global Services immediately. Do not attempt to

reset circuit breakers.]

Inverter Fault MMU D, F, S At least one of the fuses has opened or an inverter fault was

detected. The UPS module is taken off-line and is shut down.

[Contact Liebert Global Services immediately. Do not attempt to

reset the circuit breakers.]

Communication

Failure

SCC S The COM FAIL status message is as important as an alarm

message. Refer to 3.1.13 - Alarm and Status Messages.

Battery Cycle

Buffer Warning

— D, E The optional Battery Cycle Monitor can retain information about the

last 132 battery discharge events. When the storage buffer

approaches its capacity, this warning message is broadcast via

terminal and modem communication channels, and a complete

listing of all records is sent to the terminal port. The message clears

after 30 seconds.

Table 1 Alarm Messages - Meaning and Corrective Action (continued)

Alarm

Message

Cabinet

Location

Special

Functions

Meaning and

Corrective Action in Brackets [ ]

Table 1 Abbreviations

D = auto-dial; L = latches

E = reports only; R = remote

F = freezes; S = summary

D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs

D# = auto-dial initiated through Module N (1-6) off-line

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Operation 73

UPS SYSTEM (Contʼd.)

Hardware

Shutdown

MMU D# At least one of the following alarm conditions is present: Inverter

Fault, Rectifier Fuse Blown, Reverse Power, Overload Shutdown,

logic power supply failure, or inverter output symmetry failure. The

UPS module is taken off-line and is shut down.

[Contact Liebert Global Services at once. Do not attempt to reset the

circuit breakers.]

Emergency Off SCC

MMU

D*, L, S The Emergency Module Off (or Emergency Power Off) switch has

been pressed, which caused the UPS system to shut down and

transfer the load to the bypass line (or all power to the critical load

has been shutdown).

[Determine the cause of the emergency condition and correct it if

possible. Contact Liebert Global Services if you require assistance.]

COOLING

Ambient Over-

Temperature

MMU R, S The intake air to the UPS module exceeds the specified maximum

temperature.

[This condition only causes an alarm, but should be corrected

immediately to prevent damage to equipment due to overheating.]

Blower Failed MMU S A fault in one or more of the blower motors has occurred. This

condition only causes an alarm, but if not promptly corrected it could

cause an equipment over-temperature condition that would shut

down the UPS module.

[Check the blowers for proper operation. Contact Liebert Global

Services if you require assistance.]

Equipment Over-

Temperature

MMU S Sensors on power semiconductor heatsinks detect temperatures

above the steady state limits for these components. The control logic

sets off the alarm but does not shut down the UPS module if the

condition lasts less than 10 minutes.

[Check the air intake, air exhaust, and filters. Reduce the load or

transfer it to bypass. Contact Liebert Global Services if the alarm

persists.]

Over-Temperature

Timeout

MMU D, F An Equipment Over-Temperature condition has persisted for more

than 10 minutes. The UPS module is taken off-line and is shut down.

[Check the air intake, air exhaust, and filters before attempting to

start-up the UPS.]

REMOTE MONITOR PANELS

(Refer also to SCC and Module Remote Monitor Indications and Other Alarms That Activate Summary Alarms in

3.1.5 - System Configuration Screens)

Load On UPS — R (SCC) The UPS is operating properly. No corrective action is necessary.

New Alarm — R (SCC)

R (MMU)

Another new alarm message has been registered on the UPS

system.

[Clear the new alarm condition, if possible.]

System Summary

Alarm

— R (SCC) One or more of the UPS system alarm messages has been activated

or a control logic failure has been detected by a watchdog timer.

[Use the Present Status screen to determine which alarms are

active. Clear the new alarm condition if possible to do so.]

Module Summary

Alarm

— R (MMU) One or more of the UPS module alarm messages has been

activated.

[Use the Present Status screen to determine which alarms are

active. Clear the new alarm condition, if possible to do so.]

Table 1 Alarm Messages - Meaning and Corrective Action (continued)

Alarm

Message

Cabinet

Location

Special

Functions

Meaning and

Corrective Action in Brackets [ ]

Table 1 Abbreviations

D = auto-dial; L = latches

E = reports only; R = remote

F = freezes; S = summary

D* = auto-dial initiated by Auto Transfer to Bypass if load is on UPS when alarm occurs

D# = auto-dial initiated through Module N (1-6) off-line

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74 Operation

Table 2 Alarm Messages - Summary

Alarm Message MMU SCC Special Functions

Input Fail X — —

DC Ground Fault X — L, S

DC Capacitor Fuse Blown X — D, F, S

Battery CB Open X, R — S

Battery Discharging X, R R S

Low Battery Warning X, R R S

Low Battery Shutdown X — D, F, L, S

DC Over-Voltage Shutdown X — D, F, L, S

Load On Bypass — X, R —

Auto Transfer to Bypass — E D, F

Auto Retransfer Primed — X —

Manual Reset/Retransfer — X —

Static Switch Unable — X S

Bypass Not Available — X —

Bypass Phase Sequence Wrong — X —

Input Current Unbalanced E — —

Control Power Fail X, R X L, S

Output Over/Under Frequency — X L, S

Output Under-Voltage — X D, F, L, S

Output Over-Voltage — X D, F, L, S

Overload X X, R S

Overload Transfer — X D, F, L, S

Inverter Non-Synchronized X — —

Module N (1-6) Off Line R X D

Overload Shutdown X — D, F, L, S

Reverse Power X — D, F, L, S

Rectifier Fuse Blown X — D, F, S

Inverter Fault X — D, F, S

Hardware Shutdown X — D#

Emergency Off X X D*, F, S

Ambient Over-Temperature X, R R S

Blower Failed X — S

Equipment Over-Temperature X — S

Over-Temperature Timeout X — D, F

Load On UPS — R —

New Alarm R R —

Module Summary Alarm R X S

System Summary Alarm — R —

D = Auto-Dial initiated

D* = Auto-Dial initiated through Auto Transfer

to Bypass if load is on UPS

D# = Auto-Dial initiated through Module N (1-6)

off-line

E = message displayed on Status Report screens

F = freezes the History Status Report memory buffer

L = latches the displayed alarm message

R = Remote Alarm Contact (optional on MMU)

S = Summary Alarm (System or Module) initiated

X = message displayed on Monitor/Mimic screen

and audible alarm

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Operation 75

3.1.14 Communication Interfaces

Your Liebert Series 600T UPS includes the following communication ports:

• Worldwide reporting to a remote terminal through a modem

• Reporting to a local terminal (no modem required)

• Reporting to a local monitor only

• Site reporting to Liebert SiteScan Central Monitoring System

• Reporting via SNMP interface to a building management or network management system

• Selected alarm messages to a Liebert Remote Monitor Panel and to contact closures for customer use

All external communication devices, including the modem, are optional equipment. Connections to communica-

tion ports are made by wiring cables to terminal boards at the SCC. Connection points are shown on the Control

Wiring Interconnect Diagram. Contact Liebert Global Services for assistance when attaching an external device

to your UPS system.

Any terminal that accepts the standard 7-bit ASCII codes and conforms to the data link requirements can be used

to interface with the Series 600T UPS. If a printer is used, the terminal must support it. The UPS does not send or

receive any printer control commands.

Data link requirements are:

• Asynchronous RS-232 communication

• Terminals may be configured as DTE or DCE

• Baud Rate:

Modem: 1200 or 2400

Terminal: 2400 only

• Data Bits: 7

• Stop Bits: 1

• Parity: Odd

• Handshaking: Not required

• Full Duplex

Worldwide Reporting

This port transmits UPS system status and history information to a remote terminal in RS-232 format through a

PC-compatible modem.

Auto-Dial

The Series 600T UPS communication program will automatically dial a pre-programmed (customer selected)

phone number when specified alarm conditions occur. The auto-dial phone number, an alternate number, and the

modem baud rate are programmed by using the SCC System Configuration screen. The alarm messages that ini-

tiate an auto-dial call are identified in Table 1.

When the auto-dial function is initiated, automatic dial attempts to the first phone number are made at periodic

intervals for 30 minutes. If unanswered, the system rolls over to the second number and repeats calling until con-

nection is made or returns to first phone number after 30 minutes.

Once a connection is made to a terminal, the system transmits the information on the Present Status Report

screen, then hangs up. The Present Status Report includes the UPS system identification number, date, time,

alarm messages and metered parameter indications.

Requesting Information

If your Series 600T is equipped with a modem and telephone line, you can call the UPS and receive system status

and historical information on discharge events. You can place the call from either a remote terminal or a personal

computer with a communications program.

Follow the instructions for your terminal or your communications program to call the UPS. When you make con-

nection, the UPS will send you the greeting: “Hello, you are connected to a Series 600.” At this point, the UPS

will respond to your specific requests for information, according to Table 3.

For example, to see a copy of information on the Present Status Report screen from the SCC (see Present Status

in this manual), press the A key (either upper or lower case can be used for all except the date and time com-

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76 Operation

mands) and then the Enter key. The Series 600T will send the data, which will be displayed on your screen. To

see the Present Status Report screen from, say, Module 1, type A1 and press the Enter key. Please note that the

data on the screen is like a snapshot—the status of the UPS at the moment you requested the information. The

information sent remotely is not updated, although you can repeat the process at intervals to request the present

information.

Some screens, like the Battery Cycle Monitor information, contain data that you may wish to import into a

spreadsheet for further calculations. To put this data into a usable format, use the screen-capture feature of your

communications software (or a separate screen-capture program) to save all or part of the data to disk. Hint: If

you save the file with an extension of “.txt,” it can then be imported into a spreadsheet program and converted to

worksheet format.

To terminate your connection to the Series 600T, press the H key and then the Enter key. The UPS will hang up

its modem and await your next call.

Local Reporting to a Terminal

This port sends UPS system status and history information to a local terminal in RS-232 format. No modem is

required. The Present Status Report screen is sent to the local terminal whenever a new alarm occurs. Commands

for requesting information, and for changing the date and time, are in Table 2.

Local Reporting to a Monitor

A monitor connected to this port will display the same alarm information being sent to the local terminal. This

monitor does not display information going out through the modem port.

Site Reporting: SiteScan or SNMP

The SiteScan port sends UPS system information to a Liebert SiteScan Central Monitoring System. UPS opera-

tion, environmental control systems, and facility security can all be monitored from a single location. This infor-

mation can also be sent via SNMP interface to a local network or building management system.

If your site has SNMP communications, the optional Liebert SiteNet Integrator allows you to monitor the status

of all the dry-contact outputs of the Series 600T. The Integrator module monitors up to ten digital inputs and two

temperature/humidity sensors, and can control two external devices with contact closure outputs. It can be pro-

grammed to activate local audible and visual alarms in addition to network “traps.”

Remote Monitor Panel

The Liebert Remote Monitor Panel provides an LED indication of the following conditions:

Load On UPS

Load On Bypass

Battery Discharge

Low Battery Warning

Overload

Ambient Overtemp

System Summary Alarm

New Alarm

This information is also available for customer use through a set of contacts on a separate terminal board.

Alarm messages that activate the System Summary Alarm are listed in two tables—SCC and Module Remote

Monitor Indications and Other Alarms That Activate Summary Alarms—in 3.1.5 - System Configuration

Screens.

The Remote Monitor Panel housing is a NEMA Type 1 enclosure, available for either surface-mount or flush-

mount installations.

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Operation 77

Separate / Simultaneous Outputs

The RS-232 interface can support a modem plus either a local terminal or a local monitor. Likewise, the SiteScan

port can support either SiteScan or SNMP communications. Whatever interfaces you use will all operate simulta-

neously.

Table 3 Series 600T Terminal Commands

Key(s) Function

A, return

AN (N=1 to 6), return

Displays Present Status Report screen. NOTE: For all three report screens, a

number 1 through six in place of N will access an individual UPS module. If no

number is entered, you will get a report from the SCC.

^B (control-B), return

^BN (N=1 to 6) return

Displays Event History Report screen, starting with the most recent frame and then

scrolling back through earlier frames.

C, return

^CN (N=1 to 6), return

Displays History Status Report screen starting with the most recent frame and then

scrolling back through the earlier frames.

F (no return) Freezes data output. This stops the data scrolling on the monitor to allow closer

study or a printout. This is a toggle switch command. Press the Fkey again to

resume data scrolling.

G, return Resets (unfreezes and clears) the History Status Report memory buffer. This erases

the alarm messages and meter indications that were stored immediately before and

after a significant system fault. NOTE: Do not reset the History Status Report

memory buffer until operation and maintenance personnel have reviewed it as a

troubleshooting tool.

Q (no return) The data output stops (quits). The UPS communication system remains on stand-

by, ready to receive the next communication command. NOTE: To return to the

beginning of the Event History or History Status Report, press Q, then request your

desired report again.

d mm/dd/yy, return This entry sets the date (month/day/year) in the UPS system clock. You must

include the slash (/) as you key in the date. Note that the dcommand must be lower

case.

t hh:mm:ss, return This entry sets the time (hour:minute:second) in the UPS system clock. You must

include the colon (:) as you key in the time. Note that the tcommand must be lower

case.

H, Return Prompts the UPS system to hang up its modem (only applicable to the modem

communications port).

I, Return Display Battery Cycle Monitor information for 0-30 second discharge events.

J, Return Display Battery Cycle Monitor information for 31-90 second discharge events.

K, Return Display Battery Cycle Monitor information for 91-240 second discharge events.

L, Return Display Battery Cycle Monitor information for over 240 second discharge events.

M, Return Display Status Summary screen of battery discharge events.

N, Return Show detail information on all battery discharge events in order of occurrence

(Last-In, First-Out).

backspace Moves cursor left to cancel previous entry or command.

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78 Operation

3.2 Modes of Operation

This section illustrates the flow of power through circuit breakers, switches, and UPS components during various

modes of operation. An SCCB with three modules is shown. The same modes of operation apply to all configu-

rations of the Liebert Series 600T UPS multi-module system. Highlighted (thick) lines in the diagrams indicate

power flow and power availability.

These illustrations show a three-breaker maintenance bypass because it is most commonly used. Your installa-

tion may have a two-breaker, three-breaker, or four-breaker maintenance bypass, or none at all.

These illustrations do not show an alternate power source (generator) and automatic transfer switch (external to

the UPS) that might be present at your installation.

The following circuit breaker abbreviations are used:

3.2.1 Load On Bypass

Load on Bypass, with the UPS not available, is shown in Figure 47. The UPS system could be in this mode of

operation during either initial start-up or UPS system shutdown and isolation for maintenance.

Figure 47 Load on Bypass (UPS Not Available)

BFB Bypass Feeder Breaker

BIB Bypass Input Breaker

CB1 Module Input Breaker

CB2 Module Output Breaker

MBB Maintenance Bypass Breaker

MBD Module Battery Disconnect

MIB Maintenance Isolation Breaker

RIB Rectifier Input Breaker

SBB System Bypass Breaker

#2UPS

CB1

CB2

#1UPS

CB1

System

Controls

#3UPS

CB1

CB2

RIB RIB

BIB

CB2

SKRU

RIB BFB

MIB

Output

SBB

SBS

MBB

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

SCCT

Battery

MBD

Battery

MBD

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Operation 79

3.2.2 OK To Transfer

The OK to Transfer status message will be displayed when the bypass line and UPS system output power are

both available, their voltage, frequency, and phase synchronization are matched within specifications, and the

Static Switch Disconnects are closed (ON). An alarm message may be displayed to indicate Load On Bypass. If

no alarm is displayed, the operating status is Load On UPS.

When the OK to Transfer message is displayed, you can perform a manual transfer of the load from the UPS sys-

tem to bypass, or a manual retransfer of the load from bypass to the UPS system.

Use the Load Transfer Procedures screen at the SCC when performing a manual transfer. Refer to 3.3.2 - Load

Transfer Procedures.

The UPS system control logic at the SCC will initiate an automatic transfer to bypass if an overload condition

exceeds the system current versus time window, or if a UPS module is taken off line while the system is operat-

ing in the non-redundant mode. An automatic retransfer to the UPS system may be initiated when recovering

from system overloads lasting less than five minutes. Refer to 3.4 - Automatic Operations.

Figure 48 Load on Bypass (UPS Available)

NOTE

When the critical load is being supplied power from the bypass line, it is exposed to

utility power disturbances.

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

#1UPS

CB1

System

Controls

#3UPS

CB1

CB2

RIB RIB

CB2

RIB BFB

Output

SBB

SBS

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

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80 Operation

Figure 49 Load on UPS (Bypass Available)

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

#1UPS

CB1

System

Controls

#3UPS

CB1

CB2

RIB RIB

CB2

RIB BFB

Output

SBB

SBS

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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Operation 81

3.2.3 Momentary Overloads

An overload in the critical load will continue to be supplied by the UPS system if the overload condition does not

exceed the current versus time curve of overload capacity for either the SCC rating or for the number of modules

on-line.

For momentary overloads exceeding 155% of rated system (SCC) current, the static switch turns on for 40 milli-

seconds to provide current from the bypass line in parallel with current from the UPS system output. Up to

1000% of rated current can be supplied for less than one cycle, while up to 500% of rated load can be sustained

for the full 40 milliseconds of pulsed-parallel operation. By providing two power sources simultaneously, high

current can be supplied to the critical load with full output voltage regulation. The critical load can be supported

through inrush currents and momentary faults without operating the motorized circuit breakers.

If an overload situation exceeds 40 milliseconds, the UPS system continues to supply power to the critical load if

it remains within the current versus time curve of overload capacity. If the system overload capacity is exceeded,

the UPS control logic at the SCC initiates an automatic transfer to the bypass line by operating the static bypass

switch and the motorized system circuit breakers (SBB and UPS Output).

Refer to 3.4 - Automatic Operations.

Figure 50 Momentary Overload (Pulsed Static Bypass Switch)

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

#1UPS

CB1

System

Controls

#3UPS

CB1

CB2

RIB RIB

CB2

RIB BFB

Output

SBB

SBS

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

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82 Operation

3.2.4 Input Power Failure (Load On Battery)

If the utility AC power source fails, or is outside the acceptable range, the battery plant becomes the power

source for the UPS module inverters. The UPS system continues to supply power to the critical load, and also to

the controls of the UPS modules and the SCC.

You can use the Battery Time screen at the UPS modules to monitor the present battery voltage compared to the

shutdown value. The length of time the battery can sustain the load depends on the size of the load and the size

and condition of the battery plant. The battery plant is usually large enough to supply a 100% rated load for 15

minutes.

Alarm messages that indicate battery status are Battery Discharge, Low Battery, and Battery Shutdown. The

voltage limits for these alarms are displayed on the UPS module Alarm Limit Settings screen. These limits were

selected for your installation by Liebert Global Services during initial start-up.

The battery block in the UPS module Monitor/Mimic Display indicates Charge or Discharge and the current in

Amperes. Maximum battery discharge current ranges from 324 amps (for 150 kVA) to 1620 amps (for 750

kVA). Refer to the separate Installation Manual or drawings for specific data on your system.

Figure 51 Input Power Fail (Load on Battery)

BIB

SKRU

MIB

MBB

#2UPS

CB1

#1UPS

CB1

System

Controls

#3UPS

CB1

RIB RIB RIB BFB

Output

SBB

SBS

CB2

CB2 CB2

R RR

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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Operation 83

3.2.5 One Module Off-Line

A multi-module UPS system can be supplied with a back-up (redundant) UPS module, which is the typical con-

figuration. A redundant system includes one more module than the number required to supply the critical load. A

redundant system operates in the redundant mode if all modules are ON LINE. Note that the UPS system can

also operate in the redundant mode with one module OFF LINE if the critical load is reduced so that not all ON

LINE modules are required. The UPS modules share the load, and the critical load will remain on the UPS sys-

tem if any one of the modules is disconnected (goes OFF LINE) for maintenance or because of an internal fault.

The system control logic monitors the connected critical load and the number of UPS modules ON LINE. If the

UPS system is operating in the redundant mode, the REDUNDANT status message will be displayed at the Sys-

tem Control Cabinet (SCC). If the UPS system is operating in the non-redundant mode (redundant module is

OFF LINE or was not included in the system configuration), the NON-REDUNDANT status message is dis-

played at the SCC. In the Non-Redundant mode, the critical load will be transferred to bypass if any UPS module

goes OFF LINE, and you must transfer the load to bypass in order to perform maintenance on any UPS module.

Figure 52 One Module Off-Line (Load on UPS)

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

System

Controls

RIB RIB RIB BFB

Output

SBB

SBS

RIB RIB RIB BFB

#1UPS

CB1

CB2

#3UPS

CB1

CB2

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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84 Operation

3.2.6 Off Battery

The battery plant can be disconnected from the UPS modules, if required for battery maintenance, by opening the

module battery disconnect (MBD) circuit breaker(s). In this situation the UPS system will continue to supply

conditioned power to the critical load, but if input power fails, the UPS system cannot supply power to the load.

Figure 53 Load on UPS (Battery Not Available)

CAUTION

When the UPS system is operating with the module battery disconnect (MBD)

circuit breaker(s) open, the critical load is not protected from loss of the utility

source power.

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

#1UPS

CB1

System

Controls

#3UPS

CB1

CB2

RIB RIB

CB2

RIB BFB

Output

SBB

SBS

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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Operation 85

3.2.7 Emergency Modules Off

The Local Emergency Modules Off (LEMO) mode is used to remove power from all UPS system components,

and the critical load will continue to be supplied through the bypass line.

The Emergency Module Off control is a guarded pad on the SCC Control Panel (see Figure 10).

Lift the cover and press the pad. The load will be transferred to bypass, and the battery (MBD), input, and output

circuit breakers will be opened (tripped). This will remove power from all UPS system components except the

controls, system bypass circuit breaker, and the static switch.

Refer to 3.3.3 - Shutdown Procedures.

Figure 54 Emergency Modules Off

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

System

Controls

RIB RIB RIB BFB

Output

SBB

SBS

RIB RIB RIB BFB

#1UPS#3UPS

#1UPS

CB1

#3UPS

CB1

CB2 CB2

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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86 Operation

3.2.8 Emergency Power Off

The Remote Emergency Power Off (REPO) mode is used to remove all power from the critical load.

The Remote Emergency Power Off control is a switch located remotely from the UPS system. It will normally be

in the same room as the critical load equipment. This mode can also be initiated by an automatic contact closure

in the same external circuit as the manually operated switch.

When you operate the Emergency Power Off switch, all UPS circuit breakers are opened including the bypass

circuit breaker. All power through the UPS is removed from the load. Typically, the REPO circuit also opens the

circuit breakers that provide power to the bypass lines and the UPS controls.

Refer to 3.3.3 - Shutdown Procedures.

Figure 55 Emergency Power Off

BIB

SKRU

MIB

MBB

#2UPS

CB1

CB2

System

Controls

RIB RIB RIB BFB

SBB

SBS

RIB RIB RIB BFB

#1UPS#3UPS

#1UPS

CB1

#3UPS

CB1

CB2 CB2

Output

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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Operation 87

3.2.9 System Shutdown

Perform a System Shutdown procedure when you must disconnect the UPS system components from all power

sources when required for maintenance procedures.

Use the Shutdown Procedures screen when performing a manual System Shutdown.

Refer to 3.3.3 - Shutdown Procedures.

Refer to 3.2.10 - Maintenance Bypass.

Before performing any maintenance on your Liebert Series 600T UPS System, observe ALL of the WARN-

INGS in 4.0 - Maintenance.

Figure 56 System Shutdown

WARNING

LETHAL VOLTAGES ARE PRESENT WITHIN THIS SYSTEM EVEN

WHEN IT IS NOT ON OR WHEN POWER IS NOT BEING SUPPLIED.

OBSERVE ALL CAUTIONS AND WARNINGS IN THIS MANUAL.

FAILURE TO DO SO COULD RESULT IN SERIOUS INJURY OR DEATH.

DO NOT WORK ON OR OPERATE THIS EQUIPMENT UNLESS YOU ARE

FULLY QUALIFIED TO DO SO!! NEVER WORK ALONE.

BIB

SKRU

MIB

MBB

CB2

System

Controls

BFB

Output

SBB

SBS

BFB

CB2 CB2

#2UPS

CB1

#1UPS

CB1

#3UPS

CB1

RIB RIB RIB

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

DISCONTINUED

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88 Operation

3.2.10 Maintenance Bypass

Maintenance Bypass switchgear (cabinet, panelboard, switchboard or custom switchgear) allows you to totally

isolate the UPS system from all power sources, while you maintain power to the critical load.

Your installation may have a two-breaker, three-breaker, or four-breaker Maintenance Bypass, or none at all.

The main differences are the locations of the Rectifier Input Breaker and the Bypass Input Breaker (BIB).

Another option that may be present at your site is an alternate power source (generator) and an automatic transfer

switch (ATS).

Note that to totally isolate the UPS system from all power sources, the Main Input switchgear and battery circuit

breakers must also be opened.

Figure 57 Load on Maintenance Bypass (Two Breakers)

CAUTION

Instructions for operating the Maintenance Bypass circuit breakers are on the

Maintenance Bypass cabinet. Make sure you understand the proper sequence

before operating any circuit breaker. Operating a Maintenance Bypass circuit

breaker out of sequence could cut off power to the critical load.

CB2

System

Controls

BFB

Output

SBB

SBS

BFB

CB2 CB2

#2UPS

CB1

#1UPS

CB1

#3UPS

CB1

RIB RIB BIB

RIB

SCCT

(can accommodate up to 6 UPS modules)

To Critical Load

Battery

MBD

Battery

MBD

Battery

MBD

SKRU

MIB

MBB

DISCONTINUED

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Operation 89

Figure 58 Load on Maintenance Bypass (Three Breakers)

CB2

System

Controls

BFB

Output

SBB

SBS BIB

CB2 CB2

#2UPS

CB1

#1UPS

CB1

#3UPS

CB1

RIB RIB RIB

To Critical Load

SCCT

STANDBY GENERATOR

AUTOMATIC

TRANSFER SWITCH

SCCT

(can accommodate up to 6 UPS modules)

Battery

MBD

Battery

MBD

Battery

MBD

SKRU

MBB

MIB

BFB

DISCONTINUED

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90 Operation

3.3 Manual Procedures

The Liebert Series 600T UPS system is designed to function while unattended by an operator. The system con-

trol logic at the System Control Cabinet (SCC) monitors the performance of the UPS system, the availability of

power sources, and the current required by the critical load.

The system control logic at the SCC:

1. Determines what overload conditions can be sustained without a transfer to bypass.

2. Initiates an automatic transfer to bypass to sustain an overload.

3. Can initiate an automatic retransfer to the UPS after a system overload has been cleared.

4. Initiates an automatic transfer to bypass and emergency module shutdown when a specified UPS fault

occurs.

The control logic at each UPS module:

1. Determines what overload conditions can be sustained by the module while it is on-line.

2. Automatically takes the UPS module off line and initiates an emergency module shutdown when selected

UPS faults occur.

Refer to 3.4 - Automatic Operations for more details.

Manual procedures available to the operator include Start-Up, Load Transfers, and Shutdowns. These procedures

are performed by using the operator control panel and some manually operated circuit breakers and switches.

The LCD display at each UPS cabinet includes a screen to help you with each manual procedure by listing each

step you must perform.

This section lists step-by-step controls to operate and conditions to observe in the following manual procedures:

1. Start-Up: including initial start-up, recovering from input power failure, recovering from battery shutdown,

and recovering from shutdowns for emergencies or maintenance procedures

2. Load Transfers: including transfers from UPS system to bypass, and retransfers from bypass to the UPS

system.

3. Shutdowns: including module shutdowns for maintenance procedures and emergency shutdowns.

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Operation 91

3.3.1 Start-Up Procedure

SCC Start-Up

When the UPS system has been shut down, for any reason, use this procedure to start-up the UPS system to pro-

vide filtered, reliable

power to the critical load. This procedure gives step-by-step instructions for controls to operate and conditions to

observe. Your present situation could be initial start-up or recovering from input power failure, battery shut-

down, maintenance shutdown, or an emergency shutdown.

If your installation includes a Maintenance Bypass, you may already be supplying power to the critical load

equipment through the Maintenance Bypass. If there is no power to the critical load, apply power through the

UPS bypass line per the following procedure.

During a start-up procedure, power is supplied to the critical load through the UPS (internal) bypass line while

the UPS system is being energized. Depending on the reason for your UPS system shutdown, you may already

have power through the bypass line. You can determine this by observing the Monitor/Mimic Display screen at

the System Control Cabinet (SCC) after Control Power is available.

Step 1. Before you apply power to the UPS modules, determine the position of the following circuit breakers and

switches:

a. Bypass Input Breaker (BIB) - If this circuit breaker is closed, you may already have power to the

critical load through the bypass line. If this breaker is closed, leave it closed. If it is open, leave it open

until you are ready to energize the bypass line.

b. System Bypass Circuit Breaker (SBB) - This motorized circuit breaker (Figure 9) should be closed

unless you are recovering from a Remote Emergency Power Off. You may already be supplying power

to the critical load through this breaker. If this breaker is open, you will be instructed to reset it later in

this procedure.

c. UPS Output Circuit Breaker - This motorized circuit breaker (see Figure 9) should be open.

d. Static Switch Disconnects - These manually operated switches (see Figure 9) will be in the ON

(closed) position unless you are recovering from a shutdown. If these switches are OFF (open), you will

be instructed to reset them and turn them on later in this procedure.

NOTE

The following procedure assumes that the UPS installation inspection and initial

start-up have been performed by Liebert Customer Service. A Liebert authorized

representative must perform the initial system start-up to ensure proper system

operation.

CAUTION

The following procedure provides power to the critical load distribution system.

Verify that the critical load distribution is ready to accept power. Make sure that

personnel and equipment are ready for the critical load distribution system to be

energized.

NOTE

Depending on SCC model, the static switch disconnects can be two circuit breakers,

contactors, or plug-in connections on a drawout carriage assembly. The location

could be at the front, right, or rear of the cabinet. Refer to the drawing of the SCC

cabinet selected for your UPS system.

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92 Operation

Power must be provided to the UPS controls so the operator can use the LCD display and so the system logic can

perform its control functions. Note that you can use the LCD display to monitor UPS system status, even when

the UPS modules are not operating.

During a start-up procedure, power is supplied to the critical load through the UPS (internal) bypass line while

the UPS modules are being energized. Depending on the reason for your UPS system shutdown, you may already

have power through the bypass line. You can determine this by observing the Monitor/Mimic Display screen at

the System Control Cabinet (SCC).

Step 2. If the bypass line is not supplying the load, the LCD screen will be blank. Energize the bypass line by

operating the following controls:

a. Close the Bypass Input Breaker (BIB). This breaker may be in your Maintenance Bypass cabinet.

b. Observe the Monitor/Mimic Display screen to determine if your System Bypass circuit breaker (SBB)

is closed and whether the UPS Bypass line is supplying power to the critical load.

If your System Bypass circuit breaker is open (as in recovering from an Emergency Power Off or Low

Battery Shutdown), close this circuit breaker as follows:

b1. Open the SCC control panel door and find the Transfer Relay Board (Figure 11). If the red LED

(CR18) labeled TOT S/D (Total Shutdown) is on, press the Bypass Reset switch (SW1) on this

board. The red LED should turn off.

b2. Set the Static Switch Disconnects (Figure 9) OFF (open).

NOTE

If the system was shut down in response to an “Emergency Off, there may be alarm

messages on the LCD screen that describe system conditions before (or at the time of)

the shutdown. Some or all of the alarm conditions may have already been resolved.

To clear these alarm messages, turn off the control power (see Figure 8 and

Figure 9). Wait at least ten minutes for the control power circuitry to completely de-

energize. After ten minutes, turn control power back on and wait two minutes before

continuing.

CAUTION

If you are recovering from a UPS system shutdown for maintenance procedures,

verify that all of the SCC doors are closed and latched. All test equipment must

be removed from the system. All electrical connections must be secure.

NOTE

Wait two minutes after applying bypass power before you operate any other UPS

controls.

CAUTION

DO NOT assume that the UPS System Bypass Breaker (SBB) is closed.

Instructions for operating the Maintenance Bypass circuit breakers are on the

Maintenance Bypass cabinet.

Make sure you understand the proper sequence before operating any circuit

breaker. Operating a Maintenance Bypass circuit breaker out of sequence could

cut off power to the critical load.

NOTE

Depending on SCC model, the static switch disconnects can be two circuit breakers,

contactors or plug-in connections on a drawout carriage assembly. The location

could be at the front, right, or rear of the cabinet. Refer to the drawing of the SCC

cabinet selected for your UPS system.

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Operation 93

b3. Find the Close Bypass switch (SW1) on the System Interface Board (Figure 11). Press this switch

to reset the System Bypass circuit breaker. Check the Monitor/Mimic screen to verify the breaker is

closed.

b4. Press two Reset Switches for Static Switch Disconnects behind door below SCC control panel

(see Figure 9).

b5. Set the Static Switch Disconnects to ON (closed).

c. If the UPS Bypass line is available, but not yet supplying power to the load, close the circuit breakers

(external to the UPS) required to provide power to the critical load equipment. Follow the three steps

shown below.

c1. Verify the Bypass Input Breaker (BIB) and System Bypass circuit breakers are closed.

c2. Close the Maintenance Isolation Breaker (MIB).

c3. Open the Maintenance Bypass Breaker (MBB).

Observe the Monitor/Mimic Display screen to confirm that the UPS Bypass line is energized and supplying

power to the critical load equipment.

At the System Control Cabinet (SCC), press the Select pad to put the Master Menu on the LCD display. Move

the highlighted cursor to Start-Up Procedures (use the Up and Down pads). Press the Select pad to display the

Start-Up Procedures screen. Return to this screen whenever you need to see the start-up instructions.

On the LCD display, select System Configuration from the Master Menu. Verify that all of the information con-

tained in the System Configuration screen is correct. When the data is correct, press the Select pad until the dis-

play returns to the Master Menu.

Perform a module start-up procedure at each module in your UPS system until all required modules are on-line.

Then return to the SCC to complete your UPS system start-up.

Use the Monitor/Mimic Display screen at the SCC to determine the condition of the UPS system. Press the

Alarm Reset pad to clear the Alarm Messages. Refer to Table 1 for an explanation of any remaining alarm mes-

sages (except Load On Bypass). Call Liebert Global Services if you cannot clear the remaining alarm messages.

If the only alarm message displayed is Load On Bypass, the UPS system is now ready to provide filtered, unin-

terruptible power to the critical load equipment. Refer to 3.3.2 - Load Transfer Procedures to retransfer the

load from the bypass line to the UPS system.

Figure 59 SCC Start-Up Procedures Screen

CAUTION

Be sure to operate Maintenance Bypass circuit breakers in the proper sequence.

START-UP PROCEDURES

1. Wait approximately two (2) minutes before attempting any other action .

2. Select "SYSTEM CONFIGURATION" screen to verify that the correct model number is

displayed.

3. Go to the modules(s) and follow the module "STARTUP PROCEDURES".

4. Select "MONITOR/MIMIC" screen, verify that the output voltages are at the

proper nominal level and correct number of modules online is displayed.

5. If the bypass or static switch breakers are open, refer to Start-up Procedures

in the UPS manual for instructions on closing these breakers.

6. System is now ready to assume load. Select "LOAD TRANSFER PROCEDURES"

screen for this procedure.

MASTER MENUSELECT :

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94 Operation

UPS Module Start-Up

When a UPS module has been shut down for any reason, use this procedure to start-up the UPS module to pro-

vide filtered, reliable power to the critical bus. This procedure gives step-by-step instructions for controls to

operate and conditions to observe. Your present situation could be initial start-up or recovering from input power

failure, battery shutdown, maintenance shutdown, or an emergency shutdown.

Perform this module start-up procedure at each module in your UPS system until all required modules are on-

line.

Step 1. Before you apply power to the UPS module, determine the position of the following circuit breakers and

switches:

a. Rectifier Input Breaker (RIB) - If this external circuit breaker is closed, you already have power to the

UPS cabinet and possibly power to the controls. If this breaker is closed, leave it closed. If it is open,

leave it open until you are ready to apply power to the UPS cabinet.

b. Input Circuit Breaker (CB1) - Verify that this breaker on the front of the UPS module cabinet

(Figure 8) is in the OFF position.

c. Module Battery Disconnect (MBD) - Verify that this external breaker is open or tripped.

d. Module Output Circuit Breaker (CB2) - Verify that this breaker on the front of the UPS module

cabinet (Figure 8) is in the OFF position.

e. Control Power - This manually operated switch (Figure 8) will be in the ON position unless you are

recovering from a maintenance shutdown. If this switch is OFF, leave it OFF until you are ready to

apply power to the UPS controls.

Power must be provided to the UPS module controls so you can use the LCD display and so the system logic can

perform its control functions. Note that you can use the LCD display to monitor UPS status, even when the UPS

module is not on-line. If the LCD display is operating, you already have Control Power. This will be the usual

condition, unless you are recovering from a maintenance shutdown.

Step 2. If the LCD screen is not operating, energize Control Power by operating the following two controls:

a. Close the Rectifier Input Breaker (RIB), which is outside the UPS cabinet. This will provide power to

the UPS cabinet but not to any UPS components.

b. Open the UPS cabinet door and close the Control Disconnect fuseholders to turn the Control Power ON.

See Figure 8. Close the UPS cabinet door.

Press the Select pad on the UPS module to put the Master Menu on the LCD display. Move the highlighted cur-

sor to Start-Up Procedures (use the Up and Down pads). Press the Select pad to display the Start-Up Procedures

screen. Return to this screen whenever you need to see the start-up instructions.

On the LCD display, select System Configuration from the Master Menu. Verify that all of the information con-

tained in the System Configuration screen is correct. When the data is correct, press the Select pad until the dis-

play returns to the Master Menu.

CAUTION

If you are recovering from a module shutdown for maintenance procedures,

verify that all of the UPS system doors are closed and latched, AU test

equipment must be removed from the system. AU electrical connections must be

secure.

NOTE

Wait two minutes after applying Control Power before you operate any other UPS

module controls.

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Operation 95

Figure 60 Module Start-Up Procedures Screen

Select the Walk-In screen on the LCD display.

Step 3. To energize the UPS module, manually close the input circuit breaker (CB1, Figure 8). This will provide

power to the rectifier. Use the Walk-In screen to monitor the Module DC Bus voltage.

The Input Amps bars should settle at about 10% after the momentary inrush current has subsided.

Verify that the DC Voltage bar begins to gradually move to the right.

Verify that the Output Voltage bar moves to the right after the DC Voltage bar has reached the 90% level. Both

bars should settle near the 100% line.

Select the Monitor/Mimic display from the Master Menu and confirm that the module DC bus and AC output

are at their proper operating voltages.

Step 4. When the Module DC Bus voltage is at 100%, you can manually close the module battery disconnect

(MBD) circuit breaker (external to the UPS).

WARNING

IF ANY ABNORMAL SITUATION OCCURS DURING THIS WALK-IN

PROCEDURE, OPEN THE INPUT CIRCUIT BREAKER AND

INVESTIGATE THE PROBLEM. EACH INPUT AMPS BAR SHOULD BE

WITHIN 10% OF THE AVERAGE BAR LENGTH. CALL LIEBERT

GLOBAL SERVICES IF YOU NEED HELP.

START-UP PROCEDURES

1. Verify that the control power is applied to the system control cabinet (check the display

on the system control cabinet).

2. Wait approximately two (2) minutes before attempting any other action .

3. Select "SYSTEM CONFIGURATION" screen to verify that the correct model is

displayed.

4. Select "WALK-IN" screen and do the following:

a) Close module input circuit breaker. Verify that the DC voltage bar on

the display begins to gradually move to the right and the AC input

current bars do not move to the right more than 10% (40% for modules

with input filters) after the transformer inrush has subsided.

MASTER MENU

DOWN :

SELECT :

START-UP PROCEDURES (Cont'd)

b) Verify that the output voltage bar moves to the right after the DC

bus bar has reached the 90% point. Both bars should settle near

their respective 100% levels.

c) If anything happens on the display not mentioned in (a) or (b),

immediately open the module input circuit breaker and investigate.

5. If step 4 is successful, select "MONITOR/MIMIC" screen and verify module

DC bus and output voltages are at proper nominal level. If so, close

module battery circuit breaker.

6. If no alarms are present on the "MONITOR/MIMIC" screen, the module may be

placed online by closing the module output breaker.

FIRST PAGE

MASTER MENU

UP :

SELECT :

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96 Operation

The Battery block in the Monitor/Mimic Display indicates the battery voltage and charge current.

Use the Monitor/Mimic Display screen to determine the condition of the UPS module. Press the Alarm Reset

pad to clear the Alarm Messages. Refer to Table 1 for an explanation of any remaining alarm messages. Call

Liebert Global Services if you cannot clear the remaining alarm messages.

If no alarm messages are displayed, the UPS module is now ready to provide filtered, uninterruptible power to

the critical bus. Manually close the module output circuit breaker (CB2, Figure 8) to place this UPS module on-

line.

When all required UPS modules are on-line, return to the SCC to complete your UPS system start-up.

NOTE

The battery charge current may increase quickly, but then should slowly decrease. A

fully charged battery will require no more than 31 Amps of charge current. If you are

recovering from a battery shutdown or an input power failure, the UPS rectifier will

be recharging the battery. Recharge current can be more than 100 Amps. The

maximum allowable recharge current for your unit will depend on the kVA rating and

your factory-set battery recharge current limit.

CAUTION

Do not use equalize charging with valve-regulated, sealed-cell batteries. Refer to

the battery manufacturer’s manual for specific information about equalize

charging.

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Operation 97

3.3.2 Load Transfer Procedures

Use the Monitor/Mimic Display at the SCC to determine the operating condition of the UPS system. Press the

Alarm Reset pad to clear the Alarm Messages. Refer to Table 1 for an explanation of any remaining alarm mes-

sages (except Load On Bypass). Call Liebert Global Services if you cannot clear the remaining alarm messages.

If the only alarm message displayed is Load On Bypass (or no alarms), you can perform a manual transfer of the

load between the UPS system and the UPS bypass line. Changing the load from the UPS system to the UPS

bypass is called a transfer. Changing the load from UPS bypass to the UPS system is called a retransfer. Note

that the UPS system control logic can initiate automatic load transfers and retransfers. Refer to 3.4 - Automatic

Operations.

Press the Select pad to display the Master Menu on the LCD display of the SCC. Move the highlighted cursor to

Load Transfer Procedures (using the Up and Down pads). Press the Select pad to display the Load Transfer Pro-

cedures screen.

Step 1. Verify that the OK TO TRANSFER message is highlighted. If not (if the TRANSFER PROHIBIT

message is highlighted instead), slowly rotate the Voltage Adjust knob (Figure 10, item 6) to match the UPS

system voltage to the bypass voltage.

Figure 61 Load Transfer Procedures Screen

Step 2. Perform Step 2 on the Load Transfer Procedures Screen.

a. If the load is on the UPS system, simultaneously press the Bypass and Control Enable pads

(Figure 10). This will close the motorized System Bypass circuit breaker (SBB) and open the

motorized UPS Output circuit breaker in a make-before-break sequence.

b. If the load is on the UPS bypass, simultaneously press the UPS and Control Enable pads (Figure 10).

This will close the motorized UPS Output circuit breaker and open the motorized System Bypass circuit

breaker (SBB) in a make-before-break sequence.

Return to the Monitor/Mimic Display screen to monitor the operation of the UPS system. Press the Alarm Reset

pad to clear any latched alarm messages removed by the new load status. Refer to Table 1 if an alarm message

other than Load On Bypass is still displayed. Contact Liebert Global Services if you require assistance.

NOTE

1. UPS output voltage changes VERY slowly in response to movements of the

Voltage Adjust knob. To avoid overshooting, allow at least a minute for UPS

output voltage to stabilize before proceeding to the next step.

2. If the TRANSFER PROHIBIT message remains, refer to Table 1 for corrective

action for any alarm messages. Call Liebert Global Services if you cannot solve

the problem.

TRANSFER PROHIBIT

UPS LEAD = 2 Deg

UPS -

BYPASS -

380380

380381

B-CA-B

VOLTAGE COMPARISON

SELECT : MASTER MENU

OK TO TRANSFER

+30

ON UPS

50.0 Hz

379

C-A FREQUENCY

MANUAL

TRANSFER INSTRUCTIONS

1. Adjust the UPS voltage until it equals the

bypass voltage with the VOLTAGE ADJUST pot.

2. If the OK TO TRANSFER message is highlighted,

simultaneously press the BYPASS and CONTROL ENABLE

buttons.

3. Verify that the transfer was successful by checking the

breaker status on the "MONITOR/MIMIC" screen.

4. Press the ALARM RESET button to clear alarms which

are no longer active

SYNCHRONIZATION

50.0 Hz

0-30

380

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98 Operation

Maintenance Bypass Load Transfers

To manually transfer the load between Maintenance Bypass and the UPS system bypass line, carefully follow

these instructions. Do not transfer the load between Maintenance Bypass and the UPS system (module inverters)

output. Use the SCC Monitor/Mimic Display screen to verify the UPS system bypass line is available.

If the load is on the UPS System Bypass:

a. Close the Maintenance Bypass Breaker (MBB).

b. Verify closure of the MBB. Then open the Maintenance Isolation Breaker (MIB). Load is now on

Maintenance Bypass.

c. If UPS bypass shutdown is required, open the Bypass Input Breaker (BIB).

If the load is on Maintenance Bypass:

a. Close the Bypass Input Breaker (BIB) or verify BIB is closed. Note that UPS System Bypass circuit

breaker (motorized) must also be closed.

b. Close the Maintenance Isolation Breaker (MIB).

c. Verify closure of the MIB. Then open the Maintenance Bypass Breaker (MBB). Load is now on UPS

System Bypass.

CAUTION

Make sure you understand the proper sequence before operating any circuit

breaker. Operating a Maintenance Bypass circuit breaker out of sequence could

cut off power to the critical load.

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Operation 99

3.3.3 Shutdown Procedures

System Shutdown Procedure

Perform a System Shutdown Procedure when you want to remove power from the UPS system and System Con-

trol Cabinet (SCC) when required for maintenance, or if you need to perform maintenance on a UPS module in a

non-redundant system.

Before performing any maintenance on your Liebert Series 600T UPS, observe ALL of the WARNINGS in

4.0 - Maintenance.

Use the SCC Monitor/Mimic Display to determine the operating condition of the UPS system.

From the SCC Master Menu, select the Shutdown Procedures screen.

Figure 62 SCC Shutdown Procedures Screen

Step 1. If the UPS system is supplying power to the load (Load On UPS), select the Load Transfer Procedures

screen at the SCC and perform a manual transfer to the bypass line (Load On Bypass). This will open the motor-

ized UPS Output circuit breaker (see Figure 9) and close the motorized System Bypass circuit breaker (SBB,

Figure 9).

Step 2. If maintenance is required on the Static Bypass Switch, set the Static Switch Disconnects to OFF (open).

Refer to Figure 9.

NOTE

Depending on SCC model, the static switch disconnects can be two circuit breakers,

contactors, or plug-in connections on a drawout carriage assembly. The location

could be at the front, right, or rear of the cabinet. Refer to the drawing of the SCC

cabinet selected for your UPS system.

CAUTION

The UPS bypass line is still energized.

SHUTDOWN PROCEDURES

1. If load is not already being supplied by the bypass line, select the

"LOAD TRANSFER PROCEDURE" screen and follow the instructions to transfer

the load to bypass.

2. Go to the modules(s) and follow the module "SHUTDOWN PROCEDURES."

3. Press the ALARM RESET button to clear alarms which are no longer active.

4. If necessary for maintenance purposes, open the static switch disconnect

circuit breakers.

5. Wait approximately two (2) minutes before attempting any other action .

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100 Operation

Step 3. If maintenance is required in the area of the SCC controls or the motorized system circuit breakers (UPS

Output and SBB), transfer the load to the Maintenance Bypass, if available.

a. Close the Maintenance Bypass Breaker (MBB).

b. Open the Maintenance Isolation Breaker (MIB).

c. Open the Bypass Input Breaker (BIB).

Before performing any maintenance on your Liebert Series 600T UPS, observe ALL of the WARNINGS in

4.0 - Maintenance.

CAUTION

If your installation does not include a Maintenance Bypass, power must still be

isolated from both sides of the UPS circuit breakers if maintenance is required.

This will result in loss of power to the critical load. Perform an orderly load

shutdown before isolating power.

WARNING

LETHAL VOLTAGES ARE PRESENT WITHIN THIS UNIT EVEN WHEN

IT IS NOT ON OR WHEN UTILITY IS NOT BEING SUPPLIED. OBSERVE

ALL CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE TO DO

SO COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT WORK

ON OR OPERATE THIS EQUIPMENT UNLESS YOU ARE FULLY

QUALIFIED TO DO SO!! NEVER WORK ALONE.

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Operation 101

Module Shutdown Procedure

Perform a Module Shutdown Procedure when you want to remove power from a UPS module when required for

maintenance.

Before performing any maintenance on your Liebert Series 600T UPS, observe ALL of the WARNINGS in

4.0 - Maintenance.

Use the module Monitor/Mimic Display to determine the operating condition of the UPS module.

From the module Master Menu, select the Shutdown Procedures screen. Note that this is a two-page screen.

Figure 63 Module Shutdown Procedures Screen

Step 1. If the UPS module is on-line, simultaneously press the Output Trip and Control Enable pads

(Figure 10). This will open the UPS module output circuit breaker (CB2, Figure 8).

Step 2. Open the module battery disconnect (MBD) circuit breaker by simultaneously pressing the Battery Trip

and Control Enable pads (Figure 10).

SHUTDOWN PROCEDURES

MASTER MENU

1. If load can not be supported by the remaining modules when this module

is taken off line, go to the system control cabinet and select the "LOAD

TRANSFER PROCEDURES" screen. Follow the instructions to transfer

to bypass.

2. Open the module output breaker by simultaneously pressing the OUTPUT TRIP

and CONTROL ENABLE pushbuttons.

3. Open the module battery breaker by simultaneously pressing the BATTERY TRIP

and CONTROL ENABLE pushbuttons.

4. Manually open the input breaker by moving the handle to the OFF position.

DOWN :

SELECT :

FIRST PAGE

MASTER MENU

5. Verify breaker status on the "MONITOR / MIMIC" screen.

6. If necessary for maintenance purposes, turn the control power switch (fuse

disconnect on some models) to the OFF position.

7. Wait a minimum of two (2) minutes before attempting any other action.

UP :

SELECT :

SHUTDOWN PROCEDURES (Cont'd)

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102 Operation

Step 3. Manually open the UPS input circuit breaker by moving the handle to the OFF position (Figure 8).

Return to the Monitor/Mimic Display to verify status of the circuit breakers. Press the Alarm Reset pad to clear

alarm messages.

Step 4. If maintenance is required on the UPS controls, turn the Control Power switch to the OFF position

(Figure 8). You may also want to open the Rectifier Input Breaker (RIB), external to the UPS cabinet.

Before performing any maintenance on your Liebert Series 600T UPS, observe ALL of the WARNINGS in

4.0 - Maintenance.

Local Emergency Modules Off (LEMO)

The UPS controls at the SCC include an Emergency Module Off pad (Figure 10, item 12). When this guarded

pad is pressed, the load is automatically transferred to the bypass line and the module output, battery, and

input circuit breakers trip open to isolate and shut down all the UPS modules. Control Power for indicators and

alarms remains on.

Remote Emergency Power Off (REPO)

The Remote Emergency Power Off control (REPO) is a switch located remotely from the UPS system. It will

normally be in the same room as the critical load equipment.

The Remote Emergency Power Off switch removes all power to the critical load.

When you trip the Remote Emergency Power Off switch, all UPS circuit breakers are opened, including the

System Bypass circuit breaker (SBB). All power through the UPS is removed from the load. You will still have

power to the UPS controls, and you may have power to the static switch.

WARNING

LETHAL VOLTAGES ARE PRESENT WITHIN THIS UNIT EVEN WHEN

IT IS NOT ON OR WHEN UTILITY IS NOT BEING SUPPLIED. OBSERVE

ALL CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE TO DO

SO COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT WORK

ON OR OPERATE THIS EQUIPMENT UNLESS YOU ARE FULLY

QUALIFIED TO DO SO!! NEVER WORK ALONE.

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Operation 103

3.4 Automatic Operations

The Liebert Series 600T UPS system is designed to function while unattended by an operator. The system con-

trol logic monitors the performance of the UPS, the availability of power sources, and the current required by the

critical load.

The system control logic at the SCC

1. Determines what overload conditions can be sustained without a transfer to bypass.

2. Initiates an automatic transfer to bypass to sustain an overload.

3. Can initiate an automatic retransfer to the UPS after a system overload has been cleared.

4. Initiates an automatic transfer to bypass and emergency module shutdown when a specified UPS fault

occurs.

The control logic at each UPS module

1. Determines what overload conditions can be sustained by the module while it is on-line.

2. Automatically takes the UPS module off line and initiates an emergency module shutdown when selected

UPS faults occur.

3.4.1 Overloads (Without Transfer)

The UPS system is capable of sustaining full output voltage (±2% of the nominal voltage) for overload condi-

tions that remain within (under) the current versus time curve of system overload capacity and the capacity of

modules on-line (Figure 64). Note that the time scale is not linear. Load On UPS is illustrated in Figure 49.

For high current demands of short duration (momentary overloads) the critical load is supplied simultaneously

by both the UPS system and the bypass line. Whenever the critical load requires more than 155% of the capacity

of the modules on-line, the bypass line will supply up to 1000% rated system current through the solid state static

switch for 40 milliseconds. Refer to 3.2.3 - Momentary Overloads.

Whenever an overload condition occurs, you should determine the cause of the overload.

If an overload condition exceeds the UPS system overload capacity or the capacity of the modules on-line, the

UPS system initiates an automatic load transfer to the bypass line.

Figure 64 Current-Versus-Time Curves of Module Overload Capacity

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104 Operation

3.4.2 Automatic Transfers to Bypass

The UPS system will initiate an automatic load transfer to the bypass line if an overload condition exceeds the

current versus time curve of system overload capacity, or capacity of the modules on-line, or if specified UPS

system faults occur. Note that when the UPS system is operating in the non-redundant mode, an automatic trans-

fer to bypass will be initiated when any UPS module is taken off line, either automatically or manually. Load On

Bypass is illustrated in Figure 48.

The Overload Transfer and Output Undervoltage alarm messages will initiate an automatic transfer to bypass and

the Load On Bypass message will be displayed. The status report screens will include the Automatic Transfer to

Bypass message. Other UPS system faults will initiate an automatic transfer to bypass followed immediately by

the shutdown and isolation of the UPS modules. Refer to 3.4.5 - Automatic Emergency Modules Off.

In an automatic transfer to bypass the UPS Output and System Bypass circuit breakers do not overlap as they do

in a manual transfer. The static bypass switch is fired (closed), the UPS Output circuit breaker is opened, and the

System Bypass circuit breaker is closed.

Bypass power is supplied to the critical load through the static bypass switch during the short time while both cir-

cuit breakers are open.

3.4.3 Automatic Retransfers to UPS

Automatic Retransfer to UPS is an option that you can select from the SCC System Configuration screen. If you

do not want the UPS system to initiate any automatic retransfers, set Max Auto-Rexfer Attempts to zero (0).

In an automatic retransfer, the two motorized circuit breakers (System Bypass and UPS Output) are both closed

simultaneously for a short period of time (overlap).

The following critical bus conditions must be present to initiate an automatic retransfer of the critical load from

the bypass source to the UPS system:

1. The number of Auto-Rexfer Attempts selected must be greater than zero (0). If zero (0) is selected, no

automatic retransfers will occur.

2. Critical load was initially transferred to the bypass source due to a system overload only. (A manually

initiated retransfer from bypass is required if the critical load exceeded the capacity of the modules on-line,

or if a UPS fault occurred.).

3. Overload has since dropped below 100% of the rated SCC current.

4. Enough UPS modules are on-line to supply the critical load.

5. OK to Transfer signal received from the control logic for at least 10 seconds, within 5 minutes of the system

overload transfer. (A manually initiated retransfer from bypass is required for overloads lasting 5 minutes or

more.)

6. Cyclic-type overloads, which occur up to five (select range is 0 to 5) times in 60 minutes, are automatically

returned to the UPS system for each event including the Nth overload. A manually initiated retransfer from

bypass is required for the N + 1 overload.

NOTE

A load transfer to the bypass line will be completed whenever an automatic transfer

to bypass is initiated If the OK to Transfer condition is present, the load transfer will

be uninterrupted. If the Static Switch Unable alarm message is present for any

reason, the automatic transfer will be interrupted for 40 to 120 milliseconds. Because

of the reliability of the UPS components, an interrupted load transfer is a very

unlikely occurrence.

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Operation 105

3.4.4 Automatic Module Off-Line

For specified UPS module faults, the control logic will initiate an automatic isolation and shutdown of the UPS

module. In the Module Off-Line mode the output, battery (MBD), and input circuit breakers are open. If the UPS

system was operating in the redundant mode when the module was taken off-line, the critical load will remain on

the UPS system. If the UPS system was operating in the non-redundant mode, an automatic transfer to bypass

will be initiated. Note that the bypass line is usually not available during Low Battery Shutdown. One Module

Off-Line is illustrated in Figure 52.

The following UPS module faults will initiate an automatic Module Off-Line:

DC Over-Voltage Shutdown

Hardware Shutdown

Inverter Fault

Low-Battery Shutdown

Overload Shutdown

Over-Temperature Timeout

Rectifier Fuse Blown

Reverse Power

Refer to Table 1 for more information regarding these alarm messages.

3.4.5 Automatic Emergency Modules Off

For the specified UPS system fault, the control logic will initiate an automatic transfer to bypass followed imme-

diately by a shutdown and isolation of the UPS system. In the Emergency Modules Off mode the output, battery

(MBD), and input circuit breakers at each UPS module are open. The System Bypass Breaker (SBB) will be

closed if the bypass line is available. Emergency Modules Off is illustrated in Figure 54.

The following UPS system fault will initiate an automatic Emergency Modules Off:

Output Over Voltage

Refer to Table 1 for more information regarding alarm messages.

Your installation may include a Remote Emergency Power Off mode that can be initiated automatically by a

contact closure in the critical load equipment. Refer to 3.2.8 - Emergency Power Off.

NOTE

A load transfer to the bypass line will be completed whenever an automatic transfer

to bypass is initiated and the bypass line is available. If the OK to Transfer condition

is present, the load transfer will be uninterrupted. If the Static Switch Unable alarm

message is present for any reason, the automatic transfer will be interrupted for 40 to

120 milliseconds. Because of the reliability of the UPS components, an interrupted

load transfer is a very unlikely occurrence.

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106 Maintenance

4.0 MAINTENANCE

If you require assistance for any reason, call the toll-free Liebert Global Services number: 1-800-543-2378. For

LGS to assist you expediently, please have the following information available:

4.1 Safety Precautions

Observe the safety precautions in 1.0 - Introduction.

ONLY qualified service personnel should perform maintenance on the UPS system.

Observe ALL of the WARNINGS below before performing ANY maintenance on the UPS System and associ-

ated equipment. Also observe the manufacturer’s safety precautions pertaining to the battery, along with the bat-

tery safety precautions in this section.