Emerson Liebert Nx 10 30Kva Installation Manual

208V to the manual 9b8bbe75-1bff-48a0-966d-19c0f6d91209

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AC Power
For Business-Critical Continuity

Liebert NX™ UPS
Installation Manual–10-30kVA, 208V, 60Hz

TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
GLOSSARY OF SYMBOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
1.0
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
1.1
1.2

External Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Internal Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2.1

1.3

Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3.1

1.4

Identification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

UPS Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4.1
1.4.2
1.4.3

1.5
1.6

Storing for Delayed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Positioning the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Environmental Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Special Considerations for 1+N Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Considerations in Moving the NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
1.6.1
1.6.2
1.6.3
1.6.4

Clearances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Floor Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Entry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7
7
7
8

2.0

ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

2.1

Power Cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1.1
2.1.2
2.1.3
2.1.4
2.1.5
2.1.6
2.1.7

2.2

Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2.1

2.3

Cable Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
UPS Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cabling Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Safety Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Cabling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Monitor Board Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3.1
2.3.2
2.3.3
2.3.4
2.3.5

Input Dry Contacts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Bypass Cabinet Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BCB Box Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Dry Contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPO Input—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15
16
16
17
17

3.0

BATTERY INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.1
3.2
3.3

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
UPS Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

i

3.4

External Battery Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4.1
3.4.2
3.4.3
3.4.4

Matching Battery Cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Battery Cabinet to the UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20
20
22
24

3.5

Non-Standard Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.0

MAINTENANCE BYPASS CABINET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4.1
4.2
4.3
4.4
4.5
4.6

Bypass Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Normal (UPS) Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Locating the Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4.6.1
4.6.2
4.6.3

25
25
26
26
26
26

Wiring Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Power Cable Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Input/Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.7

Bolting Cabinets Together . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.0

OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5.1

Load Bus Synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1.1
5.1.2

5.2

Configuring Parallel System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5.2.1
5.2.2
5.2.3
5.2.4

5.3

Performance Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
DBS Cable and Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features of Parallel System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Principles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation Modes Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

31
31
32
32

Installing Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.3.7

Conditions for Parallel System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cabinet Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preliminary Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Protective Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parallel Control Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Emergency Power Off (EPO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

32
32
32
32
33
33
35

5.4

Battery Circuit Breaker Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.0

UPS SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

6.1
6.2
6.3
6.4

Conformity and Standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

38
38
38
39

6.4.1
6.4.2
6.4.3
6.4.4
6.4.5

40
40
40
41
41

Battery Manufacturers and Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Rectifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Intermediate Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inverter Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ii

7.0
8.0

INSTALLATION DRAWINGS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
SPECIFICATIONS AND TECHNICAL DATA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

8.1
8.2

Lug Size and Torque Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Cable Lengths: Floor to Connection Point Inside UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

FIGURES
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28
Figure 29
Figure 30
Figure 31
Figure 32
Figure 33
Figure 34
Figure 35
Figure 36
Figure 37
Figure 38
Figure 39
Figure 40
Figure 41
Figure 42
Figure 43
Figure 44
Figure 45

Cabinet arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Single module block diagram—dual input configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Input busbars . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Battery fuses and connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Ground and neutral busbar connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Monitor board U2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Auxiliary terminal block detail (Monitoring Board) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Input dry contacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Jumper connection for BCB interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Output dry contacts and EPO wiring for firmware before M170 . . . . . . . . . . . . . . . . . . . . . . . . . . 17
EPO wiring for firmware M200 or later . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Battery cabinet—details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Narrow battery cabinet, 27 in. (690mm) - rear view. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Wide battery cabinet, 57 in. (1488mm) - front view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Internal cable wiring from battery cabinet to Liebert NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Battery tray and supports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Single UPS with external Maintenance Bypass Cabinet—typical configuration . . . . . . . . . . . . . 25
Maintenance Bypass Cabinet—access plate removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Maintenance Bypass Cabinet wiring access panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Maintenance bypass control wire location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Load Bus Synchronization cable connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
1+N system block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Connecting '1+N' system parallel control cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Auxiliary dry contact cables for output breaker in multi-module system . . . . . . . . . . . . . . . . . . . 34
Dry contacts, multiple UPS modules with distribution panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Connecting EPO push button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Battery circuit breaker box connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Dimensional view- front and left side views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Dimensions continued—top and bottom views . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Main components—typical unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Cable connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Location of internal batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Battery connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Battery cabinet interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Maintenance Bypass interconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
NX 1+1 parallel cabinet interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Lineup detail—SlimLine distribution cabinet to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Lineup detail—1+N Type A connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Lineup detail—1+N Type A1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Lineup detail—1+N Type B connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Lineup detail—1+N Type B1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Lineup detail—1+N Type C connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Lineup detail—1+N Type C1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Lineup detail—1+N Type D connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
SlimLine locations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

iii

TABLES
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Table 25
Table 26
Table 27
Table 28
Table 29
Table 30
Table 31
Table 32
Table 33
Table 34
Table 35
Table 36
Table 37

Input dry contacts at X3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance bypass cabinet interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BCB box interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output dry contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EPO input contact relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Available battery circuit breaker boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Environmental characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
UPS terminal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Approved batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rectifier input power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC intermediate circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inverter output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bypass input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liebert -supplied interconnect wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liebert-supplied interconnect wiring for Maintenance Bypass Cabinet . . . . . . . . . . . . . . . . . . . .
Liebert-supplied interconnect wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liebert-supplied interconnect wiring—SlimLine distribution cabinet to NX . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type A connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type A1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type B connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type B1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type C connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type C1 connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnect wiring—1+N Type D connection to NX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torque specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery torque rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance bypass cabinet electrical data (single input). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance bypass cabinet electrical data (dual input) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi-module bypass cabinet electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance bypass cabinet lug sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance Bypass Cabinet weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Battery cabinet physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance bypass cabinet dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi-module paralleling cabinet dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distance to connection points on the NX UPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv

15
16
16
17
17
18
36
38
38
39
40
40
40
41
41
47
48
49
50
51
52
53
54
55
56
57
59
59
60
61
62
68
69
69
70
70
70

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS
This manual contains important instructions that should be followed during installation of your
Liebert NX™ UPS and batteries.
Read this manual thoroughly, paying special attention to the sections that apply to your installation,
before working with the UPS. Retain this manual for use by installing personnel.

!

WARNING

Exercise extreme care when handling UPS cabinets to avoid equipment damage or injury to
personnel. The UPS module weight ranges from 850 to 1400 lb. (386 to 635kg).
Determine unit weight and locate center of gravity symbols
before handling the UPS. Test lift and balance the cabinet
before transporting. Never tilt equipment more than 15 degrees from vertical.
Battery manufacturers supply details of the necessary precautions to be observed when
working on, or in the vicinity of, a large bank of battery cells. These precautions should be
followed implicitly at all times.
Follow all battery safety precautions 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. When connected, the nominal battery voltage is 288VDC
and is potentially lethal.
In case of fire involving electrical equipment, use only carbon dioxide fire extinguishers or
those approved for use in fighting electrical fires.
Extreme caution is required when performing maintenance.
Be constantly aware that the UPS system contains high DC as well as AC voltages.
Check for voltage with both AC and DC voltmeters prior to making contact.

!

WARNING

As with other types of high power equipment, dangerous voltages are present within the UPS
and battery enclosure. The risk of contact with these voltages is minimized as the live
component parts are housed behind a hinged, lockable door. Further internal safety screens
make the equipment protected to IP20 standards.
No risk exists to any personnel when operating the equipment in the normal manner,
following the recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be
carried out only by trained personnel.

!

WARNING

High ground leakage current: Ground connection is essential before connecting the input
supply.
This equipment must be grounded in accordance with local electrical codes.
Maximum load must not exceed that shown on the UPS rating label.

1

!

CAUTION

!

WARNING

!

CAUTION

This equipment is fitted with RFI suppression filters.
Ground leakage current exceeds 3.5 mA and is less than 1000 mA.
Transient and steady-state ground leakage currents, which may occur when starting the
equipment, should be taken into account when selecting instantaneous residual current
circuit breakers (RCCBs) or residual current devices (RCDs).
RCCBs must be selected sensitive to DC unidirectional pulses (Class A) and insensitive to
transient current pulses.
Note also that the ground leakage currents of the load will be carried by this RCCB or RCD.

Under typical operation and with all UPS doors closed, only normal safety precautions are
necessary. The area around the UPS system should be kept free of puddles of water, excess
moisture and debris.
Special safety precautions are required for procedures involving handling, installation and
maintenance of the UPS system and the battery. Observe all safety precautions in this
manual before handling or installing the UPS system. Observe all precautions in the
Operation and Maintenance Manual, before as well as during performance of all maintenance
procedures. Observe all battery safety precautions before working on or near the battery.
This equipment contains several circuits that are energized with high voltage. Only
test equipment designed 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, dangerously high electric charges
may exist within the UPS.
All power and control wiring should be installed by a qualified electrician. All power
and control wiring must comply with the NEC and applicable local codes.
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 standing on rubber mats. The service personnel
should wear insulating shoes for isolation from direct contact with the floor (earth ground).
Never work alone, even if all power is removed from the equipment. A second person should
be standing by to assist and summon help in case an accident should occur.

This unit complies with the limits for a Class A digital device, pursuant to Part 15 Subpart J
of the FCC rules. These limits provide reasonable protection against harmful interference in a
commercial environment. This unit generates, uses and radiates radio frequency energy and,
if not installed and used in accordance with this instruction manual, may cause harmful
interference to radio communications. This unit is not designed for use in a residential area.
Operation of this unit in a residential area may cause harmful interference that the user must
correct at his own expense.

Battery Cabinet Precautions
The following warning applies to all battery cabinets supplied with UPS systems. Additional warnings and cautions applicable to battery cabinets may be found in 3.0 - Battery Installation.

!

WARNING

Internal battery strapping must be verified by manufacturer prior to moving a battery cabinet
(after initial installation).
• Battery cabinets contain non-spillable batteries.
• Keep units upright.
• Do not stack.
• Do not tilt.
Failure to heed this warning could result in smoke, fire or electric hazard.
Call 1-800-LIEBERT before moving battery cabinets (after initial installation).
2

GLOSSARY OF SYMBOLS
Risk of electrical shock

!

Indicates caution followed by important instructions

AC input

AC output

i
-

Requests the user to consult the manual

+

Indicates the unit contains a valve-regulated lead acid battery

PbH2SO4

R

Recycle

DC voltage

Equipment grounding conductor

Bonded to ground

AC voltage

3

Installation

1.0

INSTALLATION
The Liebert NX™ UPS is designed primarily for telecommunications and data processing applications. Liebert Corporation neither recommends nor knowingly sells this product for use with life support and other designated “critical” devices.
This section describes the NX’s environmental requirements and mechanical considerations that
must be taken into account when planning the positioning and cabling of the UPS equipment.
Because every site is unique, this section presents a guide to general procedures and practices that
should be observed by the installing engineer, rather than step-by-step installation instructions.

!

WARNING

Do not apply electrical power to the UPS equipment before the arrival of the commissioning
engineer.

!

WARNING

!

WARNING

The UPS equipment should be installed by a qualified engineer in accordance with the
information contained in this section.

Special care should be taken when working with the batteries associated with this equipment.
When connected together, the nominal battery voltage is 288VDC and is potentially lethal.
• Eye protection should be worn to prevent injury from accidental electrical arcs.
• Remove rings, watches and all metal objects.
• Only use tools with insulated handles.
• Wear rubber gloves.
If a battery leaks electrolyte or is otherwise physically damaged, it must be replaced, stored in
a container resistant to sulfuric acid and disposed of in accordance with local regulations.
If electrolyte comes into contact with skin, the affected area should be washed immediately
with large amounts of water.
NOTE
The NX UPS can be used in TN utility system.

1.1

External Inspections
1. While the UPS system is still on the truck, inspect the equipment and shipping container(s) for
any signs of damage or mishandling. Do not attempt to install the system if damage is apparent.
If any damage is noted, file a damage claim with the shipping agency within 24 hours and contact
Liebert Global Services at 1-800-LIEBERT to inform them of the damage claim and the condition
of the equipment.
2. Compare the contents of the shipment with the bill of lading. Report any missing items to the
carrier and your local Liebert representative immediately.

1.2

Internal Inspections
1. Remove any packaging material, then visually examine the UPS and battery equipment for
transit damage, both internally and externally. Report any such damage to the shipper and to
Liebert immediately.
2. Check the nameplate inside the cabinet door to verify that the model number and rating
correspond to the ones specified. Record the model number and serial number in the front of this
installation manual. This information is necessary should service be required.
3. Check for loose connections or unsecured components in the cabinet.
4. Check for shipping damage to internal components.

4

Installation

1.2.1

Storing for Delayed Installation
If the equipment will not be installed immediately, it must be stored indoors where the humidity is no
higher than 90% and the temperature is no higher than 104°F (40°C). The storage area must protect
the NX from excessive moisture (see 6.2 - UPS Environmental).

!

CAUTION

!

CAUTION

If the UPS must remain disconnected from power for more than six (6) months, the battery
must be recharged before use. To charge the batteries, the unit must be connected to utility
power and started up—the charger operates only while the NX is operating.

When batteries are installed in the UPS or are cabinet-mounted adjacent to the UPS unit, the
battery—not the UPS—dictates the designed maximum ambient temperature.

1.3

Preliminary Checks

1.3.1

Identification
The equipment supplied has an identification tag on the back of the main door listing the type and
size of the UPS.

1.4

UPS Location

1.4.1

Positioning the UPS
Choose a location for the UPS that offers:
•
•
•
•
•
•
•

1.4.2

Easy connection to inputs, outputs and auxiliary equipment
Enough space to service the UPS
Air circulation sufficient to expel heat produced by UPS
Protection against moisture and excessive humidity
Protection against dust and other particulate matter
Compliance with fire prevention regulations and practices
Operating environment temperature of 74-80°F (23-27°C) for maximum battery efficiency

Environmental Considerations
Before installing the NX, verify that the UPS room satisfies the environmental conditions stipulated
in 6.2 - UPS Environmental, paying particular attention to the ambient temperature and air
exchange system.
The UPS unit should be installed in a cool, dry, clean-air environment with adequate ventilation to
keep the ambient temperature within the specified operating range 32°F to 104°F (0°C to 40°C).
For optimal UPS and battery system performance and service life, maintain the operating temperature within the range of 74-80°F, (23-27°C).
The NX UPS cooled by internal fans. Cooling air enters the unit through the front of the unit and is
exhausted out the top. To permit proper air flow and prevent overheating, do NOT block or cover the
ventilation openings or blow air down onto the unit. Ventilation clearance above the unit must be a
minimum of 24 in. (610mm).
See Table 9 for details on heat dissipation.

Battery Location
Temperature is a major factor in determining battery life and capacity. Battery manufacturers recommend an operating temperature of 77°F (25°C). Ambient temperatures warmer than this reduce battery life; temperatures below this reduces battery capacity. In a typical installation, battery
temperature should be maintained between 74°F and 80°F (23-27°C). Batteries should be placed
where there are no main heat sources or air inlets to prevent portions of batteries from being either
much warmer or much cooler than other parts of the batteries.
5

Installation

1.4.3

Special Considerations for 1+N Systems
1. Consider the grounding configuration of your system before finalizing module placement. For
optimal ground performance, the NX modules should be close together.
2. For optimal load-sharing performance, the UPS output cables should be approximately the same
length, plus or minus 20 percent.
3. Position modules in such a way as to minimize the length of power cables and control wiring
between UPS modules and the paralleling cabinet.

1.5

Considerations in Moving the NX
Ensure that the UPS weight is within the designated surface weight loading (lb./ft2 or kg/cm2) of any
handling equipment. See Table 9 for weights of various units.
To move the UPS and optional battery cabinets:
• The NX may be rolled on its casters when moving the unit a short distance. For longer distances,
move the UPS with a forklift or similar equipment to ease the relocation and to reduce vibration.
The optional battery cabinets should be moved with a forklift or similar equipment.

!

WARNING

Ensure that any equipment that will be used to move the NX has sufficient lifting capacity.
The NX weight ranges from 850 to 1400 lb. (386 to 635kg). See Table 9 for details. The UPS
presents a tipping hazard. Do not tilt the NX further than 15 degrees from vertical.
The UPS is fitted with casters—take care to prevent movement when unbolting the
equipment from its shipping pallet. Ensure adequate personnel and lifting equipment are
available when taking the NX off its shipping pallet. Do not tilt the unit more than 15 degrees
from center.

!

WARNING

The casters are strong enough for movement across even surfaces only. Casters may fail if
they are subjected to shock loading, such as being dropped or rolled over holes in the floor or
obstructions. Such failure may cause the unit to tip over, injuring personnel and damaging
the equipment.
Care must be taken when maneuvering units fitted with batteries. Keep such moves to a
minimum. For further information, see Battery Cabinet Precautions on page 2.

Final Position
When the equipment has been finally positioned, ensure that the adjustable stops are set so that the
UPS will remain stationary and stable (see 7.0 - Installation Drawings).

1.6

Mechanical Considerations
The NX is constructed with a steel frame and removable panels. Top and side panels are secured to
the chassis by screws. The doors may be opened for access to power connections bars, auxiliary terminals blocks and power switches.
The UPS comes with an operator control panel, which provides basic operational status and alarm
information. The cabinet houses both the power components and the internal batteries. Cooling is
provided by internal fans. The unit sits on four casters. Adjustable stops are provided to prevent the
UPS from moving once it has been moved to its final position.

6

Installation

1.6.1

Clearances
There are no ventilation grilles on the sides or rear of the UPS. The sides must be accessible during
installation. After installation, the unit may be placed with the rear against a wall and optional cabinets on either side.
To enable routine tightening of power terminations within the UPS, make sure there is sufficient
clearance in front of the NX to permit free passage of personnel with the door fully opened.
Leave a minimum of 2 ft. (610mm) between the top of the UPS and the ceiling to permit adequate air
circulation above the unit. Liebert recommends against using air conditioning or other systems that
blow air onto the top of the unit.

1.6.2

Floor Installation
The diagrams in 7.0 - Installation Drawings show the location of holes in the base plate for bolting
the equipment to the floor. An optional anchoring kit is available. For information, see your local Liebert representative.
If the equipment is to be placed on a raised floor, it should be mounted on a pedestal that will support
the equipment point loading. Refer to the bottom view in Figure 28 to design this pedestal.

1.6.3

Cable Entry
Cables can enter the NX from the top or bottom. Cable entry is made possible by removing a metal
plate attached to the UPS.
These plates are designed to allow the personnel to punch holes for fitting and securing the conduit.
Once the conduit holes are punched, these plates should be reattached to the UPS.
Connecting cables to the NX may require that the UPS be accessible from the left side to allow personnel to complete the connections and make necessary adjustments. After installation is complete,
the NX may be serviced from the front.
NOTE
When installing the UPS, the customer must provide a disconnect with overcurrent protection
at the output of the UPS.

10-30kVA UPS
The 10-30kVA NX consists of a single cabinet housing the UPS components and the internal battery
string.
Optional battery cabinets are available to provide extended run time. Each cabinet houses additional
strings of batteries that operate in parallel with the NX’s internal batteries. The cabinets are
designed to be bolted to the right side of the UPS (see Figure 1). Refer to 3.4 - External Battery
Cabinet Installation for details.
Optional maintenance bypass/transformer cabinets (MBC-T) are available. These cabinets house the
components necessary to:
• Provide an external wrap-around maintenance bypass switch for servicing the UPS
• Provide voltage transformation for site or application requirements
• Provide a means for neutral isolation and allow installations for site without a neutral conductor
MBC-T cabinets are designed to be bolted to the left side of the UPS (see Figure 1). Refer to 4.5 Locating the Cabinet, for further details.

System Composition
A UPS system can comprise a number of equipment cabinets, depending on the individual system
design requirements—e.g., UPS cabinet and External Bypass cabinet. In general, all cabinets used
will be the same height and are designed to be positioned side-by-side to form an aesthetically appealing equipment suite.

7

Installation

1.6.4

Optional Cabinets
If your NX installation includes a Maintenance Bypass Cabinet, the NX must be positioned to allow
the Maintenance Bypass Cabinet to be bolted to left side of the NX (see Figure 1). Cables from the
Maintenance Bypass Cabinet must be brought through the bottom side of the NX for connection.
The Maintenance Bypass Cabinet must be cabled and bolted to the NX before the UPS and bypass
cabinet are moved into their final position. Connect the input wiring to the Maintenance Bypass Cabinet ONLY after the units are connected and positioned.
Battery cabinets may be bolted to either side of the NX, unless used in configurations that include a
Maintenance Bypass Cabinet. If used with a Maintenance Bypass Cabinet, battery cabinets must be
installed on the right side of the UPS; see Figure 1 below.

Figure 1

Cabinet arrangement
ALL UNITS VIEWED FROM ABOVE

Maintenance
Bypass
Cabinet

Liebert
NX

Maintenance
Bypass
Cabinet

NX connected only to MBC
(MBC must be on left side of the NX)

Liebert
NX

Battery
Cabinet

Battery
Cabinet

NX connected to Maintenance Bypass Cabinet and Battery Cabinets
(MBC must be on left side of the NX)
(Battery Cabinets must be on the right side of the NX in this
configuration)

Liebert
NX
Battery
Cabinet

Battery
Cabinet

NX connected to Battery Cabinets
(Battery Cabinets may be on either side of the NX)

8

Electrical Connections

2.0

ELECTRICAL CONNECTIONS
The UPS requires both power and control cabling once it has been mechanically installed. All control
cables must run separate from power cables in metal conduits or metal ducts that are electrically
bonded to the metalwork of the cabinets to which they are connected.

!

WARNING

Before connecting input power to the NX, ensure that you are aware of the location and
operation of the overcurrent protection devices that connect the UPS input/bypass supply to
the power distribution panel.
De-energize and lockout or tagout all incoming high- and low-voltage power circuits before
installing cables or making any electrical connections.

2.1

Power Cabling

2.1.1

Cable Rating
The main factors affecting the choice and size of cable are voltage, current (also taking into account
overcurrent), room temperature and conditions of installation of the cable.
The power cables of the system must be sized with respect to the following description:
• UPS input cables - The UPS input cables must be sized for the maximum input current, including the maximum battery recharge current, given in Table 10, with respect to the unit rating and
the input AC voltage.
• UPS bypass and output cables - The bypass and output cables must be sized for the nominal
output current, given in Table 10, with respect to the unit rating and the output AC voltage.
• Battery cables - Each UPS unit has its own internal batteries factory-wired. If connecting an
external battery cabinet, the battery cables must be sized for the battery discharge current at the
end-of-discharge voltage, as given in Table 10, with respect to the unit rating.
NOTE
Table 10 gives nominal currents for determining the size of UPS power cables. Other
important factors to consider include cable route length and coordination with protective
devices.
The power cables can be sized to suit the UPS unit rating according to Table 10.

Lug Size and Torque Requirements
Refer to Table 27 for lug size and torque requirements.

9

Electrical Connections

2.1.2

UPS Input Configuration
Figure 2 illustrates the NX in a split bypass (dual-input) configuration. In this configuration the
Static Bypass and the Maintenance Bypass lines are supplied from a separate feed from the Main
input. Both sources must be protected externally with properly sized protective devices. By default,
the unit ships with internal links installed between the Bypass input and Main input (Single Input
configuration). To wire the unit as a dual input UPS, remove the links and wire the bypass to the
input bus bars, then wire the Main input directly to CB1 (see Figure 3).

Figure 2

Single module block diagram—dual input configuration
SW1/D

SW1/C

Bypass Input

Rectifier

Maintenance Bypass
Static Switch

Contactor

Inverter

AC Utility Input

Contactor

SW1/A

UPS
Output

CB1
Neutral Wire

Discharge

Battery
Charger

SW1/B

Battery

2.1.3

Cabling Guidelines
The following are guidelines only and are superseded by local regulations and codes of practice where
applicable.
1. Take special care when determining the size of the neutral cable, as current circulating on the
neutral cable may be greater than nominal current in the case of non-linear loads. Refer to the
values in 6.4 - UPS Electrical Characteristics.
2. The ground conductor should be sized according to such factors as the fault rating, cable lengths
and type of protection. The ground cable connecting the UPS to the main ground system must
follow the most direct route possible. Control wiring and power wiring must be run in separate
conduit. Output and input cables must be run in separate conduit.
3. Consider using paralleled smaller cables for heavy currents—this can ease installation.
4. When sizing battery cables, a maximum voltage drop of 4VDC is permissible at the current
ratings in Table 10. For terminal connection sizing, see Table 10.
5. In most installations, especially parallel multi-module systems, the load equipment is connected
to a distribution network of individually protected busbars fed by the UPS output, rather than
connected directly to the UPS itself. When this is the case, the UPS output cables can be rated to
suit the individual distribution network demands rather than being fully load-rated.
NOTE
If more load is added to the distribution panel, the unit’s cabling must be resized.
6. When laying power cables, do not form coils; this will help avoid increasing formation of
electromagnetic interference.
NOTE
Left-side access may be required when making power connections. Cable connections should be
made before a cabinet is attached to the left side of the NX or before the UPS is placed where
another obstruction, such as a wall, is against the NX’s the left side.
10

Electrical Connections

2.1.4

Cable Connections
The rectifier input, bypass and output are easily accessible from the left side of the unit for installation. All require lug type terminations. They are connected to busbars on the left side of the NX and
below the switch, as shown in Figure 3. These busbars are accessible when the left side panel is
removed. Busbars to connect external batteries are accessible from the front of the UPS.
NOTE
External battery connection access requires removal of a protective panel on the lower front of
the UPS to the left of the bottom two battery shelves.

Figure 3

Input busbars
Remove these links
for dual input
configuration and
wire UPS Main input
directly to CB1

Rectifier Input
Busbars
(Phases are
indicated by
letters below the
bars)

Output Busbars
(Phases are
indicated by
letters below the
bars)

C

B

A

C

B

OUTPUT

A

BYPASS

The internal batteries are connected with Anderson connectors inside the battery compartment. The
batteries are connected to fuses to protect the NX and connected equipment (see Figure 4).
Figure 4

Battery fuses and connections

Internal battery input
connections

150A 500V AC/DC

150A 500V AC/DC

B

B

Bussmann

Bussmann

MADE IN USA

MADE IN USA

11

Battery fuses
(fuses are behind
access plate on
front of UPS; see
Note on page 11)

Electrical Connections

2.1.5

Safety Ground
The safety ground busbar is located below the neutral input and output busbars as shown in
Figure 5 below. The safety ground cable must be connected to the ground busbar and bonded to each
cabinet in the system.
All cabinets and cable conduit should be grounded in accordance with local regulations.

!

WARNING

Failure to follow proper grounding procedures can result in electric shock hazard to personnel
or the risk of fire, should a ground fault occur.
NOTE
Proper grounding significantly reduces problems in systems caused by electromagnetic
interference.
NOTE
The ground and neutral busbars are easily accessible when the left protective cover plate is
removed. Cable connections should be made before a cabinet is attached to the left side of the
NX or before the UPS is placed where another obstruction, such as a wall, is against the NX’s
the left side.

Figure 5

Ground and neutral busbar connections

Output neutral
busbar

OUTPUT
NEUTRAL

INPUT
NEUTRAL

Input neutral
busbar

Ground
busbar

2.1.6

Protective Devices
For safety, it is necessary to install circuit breakers in the input AC supply and external battery battery cabinets, external to the UPS system. Given that every installation has its own characteristics,
this section provides guidelines for qualified installation engineers with knowledge of operating practices, regulatory standards and the equipment to be installed.

UPS Rectifier and Bypass Input Supply
• Protection from excessive overcurrents and short circuits in power supply input
External overcurrent protection for the AC output circuit is to be provided. See 6.4 - UPS Electrical Characteristics and Table 12 for overload capacity.
High-speed fuses and SCRs are used for internal battery circuit overcurrent protection. When an
external battery supply is used, overcurrent protection for the battery circuit is to be provided by
the customer.
• Dual Input
When wiring the UPS with dual inputs, the Rectifier input and the Bypass input must be protected separately. Size the breakers according to the input currents shown in Table 10.

System Output
When using an external distribution panel for load distribution, the output neutral and input neutral
must be separated at the input to the UPS.

12

Electrical Connections

2.1.7

Cabling Procedure

!

CAUTION

The operations described in this section must be performed by authorized electricians or
qualified technical personnel. If you have any difficulties, contact your local Liebert
representative or Liebert Global Services.
NOTE
Hydraulic pressure pliers, combinative tools and piston ring pliers should be used to connect
AC wiring.

Once the equipment has been positioned and secured for operation, and the battery and ground collars have been connected (see 2.1.4 - Cable Connections), connect the power cables as described
below. (Study the reference drawing in 7.0 - Installation Drawings.)
1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or
tagged out before installing cables or making any electrical connections.
2. Remove the left side panel to gain easier access to the connections busbars.
3. Connect the safety ground and any easier bonding ground bus cables to the copper ground busbar
located on the bottom of the equipment below the power connections. All cabinets in the UPS
system must be connected to the user’s ground connection.
NOTE
The grounding and neutral bonding arrangement must comply with the National Electrical
Code and all applicable local codes.
4. Identify and make power connections with incoming cables according to Steps 5 through 11.

Common Input Connections
5. For common bypass and rectifier inputs, connect the AC input supply cables between the power
distribution panel and the UPS input busbars (A-B-C terminals) and tighten the connections to
44 lb-in. (5 N-m) using the M6 bolt provided.
6. The input neutral cable must be connected to the input neutral busbar (N). See Figure 5.

Dual Input Connections
7. For bypass connect the AC input supply cables between the power distribution panel and the UPS
input busbars (A-B-C terminals) and tighten the connections to 44 lb-in. (5 N-m) using the M6
bolt provided.
8. For Rectifier Input connect AC input supply cables between the power distribution panel and the
UPS input circuit breaker (A-B-C terminals)
9. The bypass and rectifier input neutral cables must be connected to the input neutral busbar (N).
See Figure 5.
NOTE
Both the rectifier and bypass feeds MUST come from the same utility source, except if the UPS
system includes either a configuration F or P external maintenance bypass cabinet.

Output System Connections—Ensure Correct Phase Rotation
10. Connect the system output cables between the UPS output busbars (A-B-C N terminals) and the
critical load and tighten the connections to 44 lb-in. (5 N-m) (M6 bolt).

!

WARNING

If the load equipment will not be ready to accept power on the arrival of the commissioning
engineer, then ensure that the system output cables are safely isolated.

13

Electrical Connections

Internal UPS Battery Connections
The UPS internal batteries will be connected at the factory, EXCEPT the Anderson connections
between the shelves and to the fuses.

!

WARNING

The DC bus is live when this internal battery connection is made. This connection is to be
performed ONLY by Liebert Global Services at startup.

Observe the battery cable polarity. Be sure that the battery connector is made with the correct polarity.
11. Refit all protective covers removed for cable installation

2.2

Control Cables

2.2.1

Monitor Board Features
Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery
system (external battery circuit breaker, battery temperature sensor), communicate with a personal
computer or provide alarm signaling to external devices or for Remote Emergency Power Off (REPO).
The monitor board, arranged for this purpose, is located on the rear of the operator access door. The
main features are:
• Input and Output dry contacts signal (one pair of contacts of relay)
• Emergency Power Off control (EPO)
• Environmental parameter input interface
• User communication (for data setting and user background monitor)
• Intellislot™ interface
• Modem interface
• Temperature detect interface
Figure 6 shows the relationship and connection between the monitoring (U2) board and other boards
in the UPS.

Figure 6

Monitor board U2

U1
DSP Control

M5
Auxiliary Power

K1
Key & LED Board

U2
Monitor Board

X1
User Interface
Board

14

M3
Parallel Logic
Board

Electrical Connections

Figure 7

Auxiliary terminal block detail (Monitoring Board)
J8
J3

J1

LCD

J22

X7

J23

X6

J12
J9
J2
J15

PWR
MODEM
SNMP CARD

X5

J16
J17
Intellislot 2

J13 J21 J25

J28

J4

Intellislot 1

J26 J30 J10

X4

X4

J24

Intellislot 3

BFP INV ACF

EPO

MBC

X2

X1

2.3

Dry in

BCB

NOTE: The black square ()
on each slot indicates Pin 1.

X3

Dry Contacts
The UPS provides input dry contacts and output dry contacts.

2.3.1

Input Dry Contacts
There are several input dry contacts at the X3 slot.

Figure 8

Input dry contacts

NOTE: The black square () on each slot indicates Pin 1.

Table 1
Position

Input dry contacts at X3
Name
3

J4.1

ENV

J4.2

BtG

J4.3
J4.4

1,2

GEN

+12V

Description
Battery Room Alarm (N.C.)
Battery Ground Fault Detection (N.C.)
Generator Join Detection (N.O.)
+12V Power

1 - Must be configured by configuration software before becoming active.
2 - When activated, the charger current can be limited, via software, to a percentage of the full charger current (0-100%).
3 - Activating this feature turns the battery charger off.

15

Electrical Connections

2.3.2

Maintenance Bypass Cabinet Interface
J26 and J30 are the MBC interface.
Table 2

Maintenance bypass cabinet interface

Position

Name

Description

J26.1

T_IT1

Input transformer over temperature (N.C.)

J26.2

AUX_I

Reserved

J26.3

+12V

+12V Power

J26.4

GND

Power Ground

J30.1

FUSE

Reserved

J30.2

F_FAN

Fan Fail Alarm (N.C.)

J30.3

T_OT

1

J30.4

AUX_O

Output Transformer Overtemperature (N.C.)
Reserved

1 - Must be configured by software before becoming active

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.

2.3.3

BCB Box Interface
J10 is the BCB box interface.
Table 3

BCB box interface

Position

Name

J10.1

DRV

J10.2

FB

J10.3

GND

J10.4

OL

Description
BCB Driver Signal - Reserved
BCB Contact State
Power Ground
BCB On-Line - Input - This pin will become active when
BCB interface is connected. (N.O.)

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.
NOTE
If BCB interface is connected, a jumper needs to added between Pin 3 and Pin 4.
Jumper connection for BCB interface

UPS Monitoring Board

OL

J10
GND
FB
DRV

Figure 9

Aux – N.O.
Aux – N.O.

Battery Circuit Breaker

16

Electrical Connections

2.3.4

Output Dry Contacts
There are three output dry contact relays at the X1 slot (see Figure 10 and Table 4).

Figure 10 Output dry contacts and EPO wiring for firmware before M170

+12V

X2

ACF_O

J28
ACF_S

ACF_C

INV_C

BFP_O

BFP_S

BFP_C

Table 4

J25
INV_O

J21

J13

INV_S

X1

EPO-H

EPO-L

Output dry contact relays

Position

Name

Description

J13.2

BFP_O

Bypass feedback protection relay. Normally open. Closed when bypass SCR is shorted.

J13.3

BFP_S

Bypass feedback protection relay center

J13.4

BFP_C

Bypass feedback protection relay. Normally closed. Open when bypass SCR is shorted.

J21.2

INV_O

Inverter mode relay. Normally open. Closed when UPS is in inverter mode.

J21.3

INV_S

Inverter mode relay center

J21.4

INV_C

Inverter mode relay. Normally closed. Open when UPS is in inverter mode.

J25.2

ACF_O

Main input fault relay. Normally open. Closed when main input is in fault.

J25.3

ACF_S

Main input fault relay center

J25.4

ACF_C

Main input fault relay. Normally closed. Open when main input is in fault.

NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.

2.3.5

EPO Input—Optional
Firmware Before M200
The UPS has an Emergency Power Off (EPO) function that operates by a button on the control panel
or by a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 10, is the remote EPO input interface. It is active when shorted from
EPO-L to EPO-H.
If an external Emergency Stop facility is required, it is connected terminals EPO-L to EPO-H of the
auxiliary terminal block (X2). It also is connected to the Normally Open remote stop switch between
these two terminals using shielded cable (see Figure 10 and Table 5). If this function is not used,
terminals EPO-L to EPO-H must be opened.
Table 5
EPO input contact relays
Position

Name

Description

J28.2

EPO_L

Emergency Power Off Low

J28.4

EPO_H

Emergency Power Off High

NOTE
The Emergency Stop action within the UPS shuts down the rectifier, inverter and static
bypass. It does not internally disconnect the input power supply.
To disconnect ALL power to the UPS, open the upstream feeder breaker(s) when the remote
EPO is activated.

17

Electrical Connections

Firmware M200 or Later
The UPS has an Emergency Power Off (EPO) function operated by a button on the control panel or by
a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.
The X2 slot, shown in Figure 11, is the remote EPO input interface. The EPO has a NO/NC contact
point becomes active when shorting terminals X2: 3 and 4 or open terminal connection X2: 2 and 1.
If an external Emergency Stop facility is required, it is connected terminals X2: 1&2 or X2: 3 and 4 of
the auxiliary terminal block (X2). It also is connected to the Normally Open or Normally Closed
remote stop switch between these two terminals using shielded cable (see Figure 11 and Table 6). If
this function is not used, terminals X2: 3 and 4 must be opened and X2: 1 and 2 must be closed.
Figure 11 EPO wiring for firmware M200 or later
X2

J28

EPO - NO

Table 6

EPO - NC

EPO input contact relays

Position

Name

Description

J28.1

EPO_NC

EPO Activated when opened to J28.2

J28.2

EPO_NC

EPO Activated when opened to J28.1

J28.3

EPO_NO

EPO Activated when shorted to J28.4

J28.4

EPO_NO

EPO Activated when shorted to J28.3

NOTE
The Emergency Stop action within the UPS shuts down the rectifier, inverter and static
bypass. It does not internally disconnect the input power supply. To disconnect ALL power to
the UPS, open the upstream feeder breaker(s) when the remote EPO is activated.
NOTE
Normally Closed EPO – X2: 1,2, these terminals are supplied factory-linked on the monitor
board and must remain installed if using NC contacts.
NOTE
All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded
for maximum runs between 82 and 164 feet (25-50m), respectively.

18

Battery Installation

3.0

BATTERY INSTALLATION

3.1

Introduction
Liebert recommends that the batteries in external cabinets match the internal batteries in the NX in
manufacturer and type.
If using multiple sets of batteries connected in parallel to provide the required battery backup run
times, fit each set with an isolating device to permit working on one of the battery sets while leaving
the others in service and providing backup protection.
When replacing batteries, replace with the same manufacturer and type, or equivalent. See your Liebert representative for a list approve batteries.
NOTE
The NX, as shipped, has 24 12-volt batteries installed internally in each unit.

3.2

Safety
Special care should be taken when working with the batteries associated with the NX system equipment. When all batteries are connected together, the battery terminal voltage may exceed 324V and is
POTENTIALLY LETHAL.

!

3.3

WARNING

The NX's internal batteries are connected and energized even if the UPS is turned Off. To
minimize the risk of injury, a qualified service person should disconnect internal batteries
before any maintenance is performed on the unit.
The center of the battery is connected to the neutral of the UPS and is grounded.
A battery can present a risk of electrical shock and high short circuit current. The following
precautions should be observed when working on batteries:
• Remove watches, rings and other metal objects.
• Use tools with insulated handles.
• Wear rubber gloves and boots.
• Do not lay tools or metal parts on top of batteries.
• Disconnect charging source prior to connecting or disconnecting battery terminals.

UPS Batteries
The NX's internal batteries are fully charged before the unit is shipped. During storage and transportation, some charge is lost. All batteries should be recharged before use. The battery charger works
only when the NX is connected to input power and turned On.
NOTE
Full safety instructions concerning the use and maintenance of UPS batteries are provided in
the appropriate battery manufacturer's manuals, available on the manufacturer's Web site.
The battery safety information contained in this section relates to key considerations that must
be taken into account during the installation design process and might affect the design
outcome, depending on your installation.

19

Battery Installation

3.4

External Battery Cabinet Installation

3.4.1

Matching Battery Cabinets
Two sizes of optional battery cabinets are available. Refer to Figures 13 and 14. The same model battery cabinet may be installed in parallel in multiple cabinet strings for additional capacity. Battery
run time depends on the cabinet model, the number of cabinets and the load on the UPS.
Handling—The battery cabinet has casters to facilitate movement over short distances. The bottoms
of the battery cabinets are reinforced to permit movement by forklift over longer distances.
Inspection—Remove all panels and visually inspect the batteries, bus connections, and cabinet for
any damage. Exercise caution; voltage is present within the battery cabinet even before installation.
If there are signs of damage, do not proceed. Call Liebert Global Services at 1-800-542-2378.
Storage—The batteries can be stored for up to six months without appreciable deterioration. If planning to store a battery cabinet for longer than six months or at temperatures higher than 77°F (25°C),
contact Liebert Global Services for recommended precautions.
The following notes, in conjunction with the diagrams (Figure 13 through 12), illustrate the broad
principles to be followed when fitting and connecting the majority of battery cabinet installations.

!

CAUTION

Any battery system should be installed by qualified personnel.

When installing an external battery cabinet that is NOT a Liebert NX battery cabinet, the customer
must provide overcurrent protection. See Table 10 for sizing of protection devices.
NOTE
When using an external battery supply that is not provided with the UPS, please make
reference to the battery manufacturer’s installation manual for battery installation and
maintenance instructions, available on the manufacturer’s Web site. When replacing batteries,
Liebert recommends that the batteries in external cabinets be the same type used internally in
the NX. See Table 11 for a list of batteries that are approved for use with this product.

3.4.2

Connecting the Batteries
If the NX battery cabinets are installed on a raised floor, the battery power cables and circuit breaker
control cables may be routed to the UPS cabinet via the floor of the cabinet (bottom entry).
If the NX battery cabinets are installed adjacent to one another on a solid floor, these cables may be
passed between the cabinets through lifting slots in the lower sides of the cabinets.
Intertray connections must be made before the battery cabinet may be used.

Figure 12 Battery cabinet—details

Removable retainer
Tray handle

Insulated post
for cabling

20

Battery Installation

Figure 13 Narrow battery cabinet, 27 in. (690mm) - rear view
Top
cable
entry

BCB plate
and BCB

Battery
trays

Figure 14 Wide battery cabinet, 57 in. (1488mm) - front view
Top cable entry
Batteries

BCB plate and
BCB

Battery tray
support
Service
shelf

Battery tray

21

Battery Installation

3.4.3

Installation Considerations
Position—Liebert battery cabinets come in versions specific to either the left or right side of the
UPS. Control wires and power cables are cut to different lengths for the different versions. If the system includes a matching maintenance bypass cabinet (MBC), the MBC should be mounted to the left
of the UPS (nearest the busbars) and the battery cabinet(s) should be installed to the right of the
UPS. Otherwise, left-side placement of the battery cabinet is preferable.
The battery cabinet(s) are designed to be located conveniently next to each UPS module, and are also
available in stand-alone configurations with painted side panels. The front access design eliminates
side and rear service clearance requirements. Refer to Table 33 for battery cabinet dimensions and
weights.
Bolt-On Cabinets—Matching battery cabinets are designed to bolt onto the side of the UPS module
cabinet. Use bolts that ship with each unit to connect cabinet frames at posts, two places in the front
and two places in the rear.
Service Clearance—Allow front access to the battery cabinet at all times for maintenance and servicing. Electrical codes require that the battery cabinet be installed with no less than 3 feet (1m) of
clearance at the front of the cabinet when operating. Side and rear panels do not require service clearance.
Cables—Cables may be run between the cabinets through cutouts in the top of the cabinet, eliminating the need for external conduit runs. Route cables before moving cabinets into final position for bolting together. No top or bottom entry cables are required, except for remotely located cabinets which
require conduits. Refer to Figure 15.
Software—To allow the UPS to accurately display the battery run time, the number of battery cabinets must be noted when performing initial startup and setup using the configuration software. This
is to be performed by the Liebert Global Services customer engineer when commissioning the unit.
Casters and Adjustable Stops—The adjustable stops are not designed to bear the full weight of the
cabinet. Lower the stops until they are finger-tight in contact with the floor. Then tighten a small
amount with a wrench (less than two turns) to give a good friction fit. When mounting the battery
cabinet on seismic stands, ensure that the casters are bearing the weight of the cabinet.
Battery Support Tray—Be sure to connect the battery tray support to the front of the cabinet
before sliding a battery tray out for connection or service. Without the support, the battery tray may
fall out of the cabinet. See Figure 16 for details.

22

Battery Installation

Figure 15 Internal cable wiring from battery cabinet to Liebert NX
Power cables from output power switch

Power cables
from batteries

Power cables exit battery
cabinet, enter Liebert NX

Power cables run
across top
of Liebert NX

Power cables
(black) enter
channel down side
of NX to power
input connections

RIGHT SIDE CABLE
ENTRY SHOWN;
CUTOUTS ON LEFT
SIDE PERMIT
CONNECTION
FROM THAT SIDE.

Figure 16 Battery tray and supports

Battery tray supports attach
to interior surface of NX
front door (note notched
ends of supports)

Slot in support secured by
screw-in connector at
corner of battery tray ...

... and notched end of support
slips into slot at top corner
of battery compartment
23

Battery Installation

3.4.4

Connecting the Battery Cabinet to the UPS
After the battery cabinet equipment has been positioned and secured for operation and the batteries
have been connected, connect the power cables as described below. (See Figure 34.)
1. Verify that all incoming high and low voltage power circuits are de-energized and locked out or
tagged out before installing cables or making any electrical connections.
2. Remove the UPS left side panel to gain access to the equipment ground busbar.
3. Remove the external battery terminal block plate on the lower left side of the UPS behind the
front door.
4. Remove the battery cabinet front panel to gain access to the connection bars.
5. Connect the safety ground and any necessary bonding ground cables to the copper ground busbar.
(example: UPS located on the bottom of the equipment below the power connections).
All cabinets in the UPS system must be connected to the user's ground connection.
NOTE
The grounding and neutral bonding arrangement must be in accordance with the National
Electrical Code and all applicable local codes.
6. Connect the system battery cables from the UPS battery terminals (+ N -) to battery cabinet BCB
(+ N -) as shown in Figure 34. Be sure that the battery connections are made with the right
polarity, and tighten the connections to 44 lb-in. (5 N-m) (M6 Bolt). Do not close the battery circuit
breaker before the equipment has been commissioned.
7. Connect supplied auxiliary control cable to pins J10.2 and J10.3 on the U2 monitoring board (see
2.3 - Dry Contacts). Add a jumper wire between J10.3 and J10.4.

3.5

Non-Standard Batteries
When batteries other than a matching battery cabinet are used, a remote battery disconnect switch
with overcurrent protection is required per the National Electrical Code. Contact your local Liebert
sales representative about this option.
Install battery racks, cabinets and batteries in accordance with the manufacturer's instructions.
Verify that the battery area has adequate ventilation and battery operating temperature complies
with the manufacturer's specifications and with all applicable national and local codes.
If you have any questions concerning batteries, battery racks or accessories, contact Liebert Global
Services at 1-800-543-2378.

24

Maintenance Bypass Cabinet

4.0

MAINTENANCE BYPASS CABINET
The Maintenance Bypass Cabinet is designed to operate in UPS mode, bypass mode and maintenance
mode. The mode is selected using the Bypass Switch.

Figure 17 Single UPS with external Maintenance Bypass Cabinet—typical configuration
N

Input Supply
ABC

Sys In CB1

Qin UPS

N
Input Mains
Supply A B C

UPS 1

CB 1

Charger

Rectifier
CB 1
SW1-C
Rotary
Switch
Static
Switch

SW

Fuse
Inverter
SW1-D
Battery 1
Ext Byp

SW1-A

N

Ext Byp

ABC
Y
QoutUPS
Sys Out CB2

N
To Load

4.1

Bypass Switch
The Bypass Switch allows easy and rapid transfer of connected loads between the UPS and Bypass
source.

4.2

Normal (UPS) Mode
While the Maintenance Bypass Cabinet rotary switch is in the NORMAL position, the UPS is supplying the connected load with continuous, high-quality AC power. In this mode of operation, the load is
protected by the UPS.

25

Maintenance Bypass Cabinet

4.3

Bypass Mode
When the Maintenance Bypass Cabinet is in the Bypass mode, it provides an alternate path for power
to the connected equipment. Should the UPS need to be taken out of service for limited maintenance
or repair, manual activation of the bypass will cause an immediate transfer of the equipment from the
UPS inverter to the bypass source. In this mode, power will still be supplied to the UPS; however, the
load is NOT protected by the UPS.

4.4

Maintenance Mode
When the maintenance bypass cabinet is in the Maintenance mode, it provides an alternate path for
power to the connected equipment. Should the UPS need to be taken out of service for limited maintenance or repair. In this mode of operation, no power is supplied to the UPS and the load is NOT protected by the UPS.

4.5

Locating the Cabinet
This Maintenance Bypass Cabinet may be mounted to the left of the UPS or installed as a stand-alone
unit. In either case, ensure that the unit is in a well-ventilated area and that there is clearance for
access to the switches and cable connections as required by national and local codes.

4.6

Cable Installation

4.6.1

Wiring Preparation
Be sure that the unit is not connected to any AC utility power source or UPS before installing any wiring to this unit. This Maintenance Bypass Cabinet should be installed by a qualified / certified electrician.

!

WARNING

Please read this section thoroughly before attempting to install wiring to this unit.

Removing the Cover Plates
Plates cover the input and output terminals on the front of the Maintenance Bypass Cabinet (see
Figure 18). Remove these and keep the screws and plates for reinstallation.
Figure 18 Maintenance Bypass Cabinet—access plate removed

Extract screws
from corners to
remove the
access plate

26

Maintenance Bypass Cabinet

4.6.2

Power Cable Installation
Refer to Tables 29, 30 and 32 when selecting cables.
NOTE
Transient and steady state earth leakage currents may occur when starting the equipment.
This should be taken into account when selecting ground current detection devices because
these will carry the earth leakage currents of both the UPS equipment and the load.

4.6.3

Input/Output Wiring
Follow the steps below to connect the input wiring:
NOTE
Input wiring must be installed using conduit if cabinet is not mounted to the immediate left of
the UPS.
1. Locate the input wiring access (top or bottom access), remove the conduit landing plate and punch
the appropriate size hole for the size conduit being used. Pull the three/four input wires through
it, allowing some slack for installation. For cabinets that are located to the immediate left of the
UPS, the access plate is on the lower right of the cabinet. Remove the access plate and verify that
the edge guarding is installed and intact.See Figure 19.

Figure 19 Maintenance Bypass Cabinet wiring access panel

Wiring access is on
lower right side of
Maintenance
Bypass Cabinet

Access panel removed,
wiring connects NX and MBC

Edge Guard

2. Secure the conduit to the access plate of the Maintenance Bypass Cabinet.
3. Input power cables connect to the system input circuit breaker. Refer to Figure 35 Maintenance Bypass interconnection
4. Connect the ground (earth) wire to the earth busbar and tighten it to 44 lb-in. (5 N-m) (M6 bolt).
5. Locate UPS input and output cables and access panel to UPS on lower right side. See Figure 19.
NOTE
If the maintenance bypass cabinet is not to be bolted to the UPS, use either top or
bottom access plate.
6. Connect the system ground cable between the Maintenance Bypass Cabinet and UPS and tighten
the connections to 44 lb-in. (5 N-m) (M6 bolt).

27

Maintenance Bypass Cabinet

7. Connect the system input cables between the Maintenance Bypass Cabinet 'UPS Input' Busbars
(A-B-C N terminals) and UPS input busbars (A-B-C N terminals) and tighten the connections to
44 lb-in. (5 N-m) (M6 bolt).
8. Connect the system outnput cables between the Maintenance Bypass Cabinet 'UPS Output'
Busbars (A-B-C N terminals) and UPS output busbars (A-B-C N terminals) and tighten the
connections to 44 lb-in. (5 N-m) (M6 bolt).
9. Connect supplied control wire to X3 on the Parallel (M3) board (see Figure 20).

!

WARNING

The control wire must be installed to ensure proper operation of the system and fully protect
the load when switching between bypass cabinet and UPS.

:X T M IAN T

X2 1

P1

DBS

X3

X2 2

P2

Terminal Block Location

485485+

Figure 20 Maintenance bypass control wire location

NOTE
For startup procedure, see the UPS operations and maintenance manual, SL-25210.

28

Maintenance Bypass Cabinet

4.7

Bolting Cabinets Together
NOTE
UPS wiring must be completed before the cabinets are bolted together.
1. Line up cabinets so that mounting holes are aligned.

Place cabinets so mounting holes are
aligned.
A bolt from the adjacent cabinet may be
screwed into the threaded top hole, or a
bolt may be inserted through the lower
hole and screwed into the threaded hole
in the adjacent cabinet.

2. Using supplied hardware, bolt the cabinets together. The bolts may be inserted from either the
UPS side or from the MBS side, whichever is more convenient.

29

Options

5.0

OPTIONS

5.1

Load Bus Synchronization
The Load Bus Synchronizer (LBS) keeps the output of two independent UPS systems or parallel UPS
systems in synchronization even when the systems are operating in different modes and even when
either or both systems are operating on batteries. When the LBS is used, one UPS system is designated as master, the other as slave.
The LBS option is typically used with dual-corded equipment or with either the Liebert SmartSwitch
or Static Transfer Switch (STS) for single-corded equipment.

5.1.1

Performance Requirements
The DBS operates under the following conditions:
• Both master and slave are on inverter
(either system may be on inverter through the rectifier or on inverter through the batteries)
• Master on inverter, and slave on bypass
• Master on bypass, and slave on inverter
• Master and slave on bypass IF the bypass source is the same for both systems

5.1.2

DBS Cable and Settings
For NX-to-NX dual bus configuration, only one optional LBS cable is required, the built-in LBS will
operate normally without extra LBS control box or interface box. The LBS port is X4 on the parallel
board (M3). The parallel board is on the interior of the NX, above and left of the power electronics; see
Figure 30.
An optional, 9-pin LBS cable is used to connect two UPS systems through each system’s DB9 port on
its parallel board. For two parallel systems, the LBS cable can be mounted between any two units
belonging to different parallel systems. For information about the LBS kit or to order the optional
equipment, see your local Liebert representative.
The LBS cable is connected as illustrated in Figure 21.

Figure 21 Load Bus Synchronization cable connection
LBS Cable

Parallel Board
X3

Parallel Board

X4

X4

X2-1 X2-2

X2-1 X2-2

X1-1 X1-2

UPS Module or
System #1

X1-1 X1-2

The parallel board is on the
interior of the NX, above and
left of the power electronics;
see Figure 30

UPS Module or
System #2

The LBS function is activated with configuration software; when the LBS takes effect, the graphic
LCD will display “LBS active.”

30

Options

5.2

Configuring Parallel System Operation

5.2.1

General
The NX uses intelligent and reliable decentralized technology to achieve parallel operation of two or
more modules of the same rating.
The 1+N system is used to:
• Increase the reliability of the system to ensure adequate power supply to the critical load connected.
• Increase serviceability and allow the execution of maintenance operations and reparations without affecting the ordinary operating conditions of the system (depending on the redundancy level).

5.2.2

Features of Parallel System
• The hardware and firmware for parallel UPS module operation is standard in the NX, and the
configuration can be set up by changing the settings in configuration software.
• It is easy to install the parallel cables in a ring, providing high reliability and redundancy. And
the intelligent paralleling logic provides the user with maximum flexibility. For example, shutting down or starting up the UPS modules in the parallel system can be done in any sequence. If
an overload transfer occurs, the whole system can recover automatically from bypass mode after
the overload is cleared.
• The total load of the parallel system can be queried from each module’s liquid crystal display
screen.

Figure 22 1+N system block diagram
Supplied
by Others

N

N

Fuse

Static
Switch

Charger
Inverter

SW1-D

Battery 1

Fuse

CB 1
Rectifier

Battery 2

Rectifier

UPS 2

Static
Switch

Charger
Inverter

SW1-A

SW1-A

ABC

ABC

Q1Ext
QUPS

Q2Ext
Paralleling Cabinet

To Load
31

QByp

SW1-D

CB 1
SW1-C

UPS 1

Input Mains
Supply A B C

SW1-C

Input Mains
Supply A B C

Appendix

5.2.3

Operating Principles
Redundancy Paralleling
The 1+N parallel redundant system can noticeably improve system reliability. In normal condition,
none of the UPS modules work at full load. That means that even if the load is increased, the system
will not transfer to bypass. And when a UPS module shuts down due to any failure, the remaining
UPS modules can still power and protect the load. When redundancy is lost due to module failure or
load increase, the parallel system will trigger an alarm.

5.2.4

Operation Modes Summary
The parallel system also has operation modes such as normal, battery, bypass and maintenance
bypass. All UPS modules in the 1+N parallel system operate in coordination.
• Normal Mode Operation
The load is powered by the inverters of all the UPS modules in the system. If the frequency of
bypass is within the synchronous range, the inverter will be synchronized with the bypass. Otherwise, the system will operate at nominal frequency.
• Battery Mode Operation
The batteries of all UPS modules power the load through their inverters. The system operates at
nominal frequency.
• Bypass Mode Operation
The condition to transfer to bypass mode is essentially the same as that of single module system.
The bypass of all the UPS modules powers the load.
• Maintenance Bypass Mode Operation
The sequence to transfer to maintenance bypass mode is the same as for transferring a singlemodule system. The maintenance bypass switches should be switched on as synchronously as possible. Thus the system can be repaired without interrupting the power supply to critical load.

5.3

Installing Parallel System
The basic installation procedure of parallel system is the same as that of single module system. The
following sections introduce only the installation procedures specific to the parallel system.

5.3.1

Conditions for Parallel System
•
•
•
•

Each UPS module should have the same rating, the same firmware and hardware version.
Each UPS module must have the same bypass source.
The outputs of all UPS modules are connected altogether.
The main inputs can be from different sources, but the phase rotation sequence of main inputs,
bypass inputs and outputs must be correct and the same.
• The parallel logic cable and load sharing cable must be connected in a ring correctly (see
Figure 23).

5.3.2

Cabinet Installation
Parallel system composed of two or more UPS modules using parallel cabinet
The UPS modules that will form the 1+N system should be placed side-by-side. Each battery cabinet
is placed next to its corresponding UPS module.
The parallel cabinet should be placed in the middle of the system.

5.3.3

Preliminary Checks
Each UPS module should have the same rating, the same firmware and the same hardware version.
Refer to the instructions in 5.3.1 - Conditions for Parallel System.

5.3.4

Protective Devices
For each UPS, refer to Table 10. For each system, refer to Table 31.

32

Appendix

5.3.5

Power Cables
Wiring of power cables is similar to that of single module system (See 2.1 - Power Cabling). The
bypass sources of all modules should be the same, and the outputs should be connected altogether correctly.
Power cables will be supplied by customer. Power cables to the UPS’s of the 1+N paralleling cabinet
must be routed through either the top or bottom entry access of the UPS.
For systems using a parallel cabinet, see Figures 36 and 38 through 44 for power cable terminations.
NOTE
The length and specifications of power cables including the bypass input cables and UPS
output cables should be the same, thus the load can be shared evenly in bypass mode.

5.3.6

Parallel Control Cables
Parallel System Control Cables
Make the connections listed below on the parallel logic board (M3) inside the NX. (See Figure 30 for
the location of the parallel logic board):
Shielded and double-insulated control cables available in lengths of up to 100 feet (30m) must be
interconnected in a ring configuration between UPS modules as shown below. The ring configuration
ensures high reliability of the control (refer to Figure 23).
See Figure 25 for dry contacts control cable wiring diagram.

Figure 23 Connecting '1+N' system parallel control cables

1
Parallel Board
X3
P5

Parallel Board
X3
P5

X4
X2-2

UPS

2

X2-1

3
Parallel Board
X3
P5

X4
X2-2

4
Parallel Board
X3
P5

X4

X2-1

X2-2

X2-1

X4
X2-2

X2-1

X1-1

P1
X1-2
P4

P2

P1
X1-2

P3

X1-1

P4

P2

P1
X1-2

P3

X1-1

P4

P2

P1
X1-2

P3

P3

X1-1

P4

P2

Interconnecting
Cables

Auxiliary Dry Contact Cables
The external output breaker of each UPS must have Normally Open auxiliary contacts. These contacts must be wired to connector X3 on the Parallel Logic Board (M3). See Figure 24.

33

Appendix

:X T M IAN T

X2 2

P2

X2 1

P1

DBS

X3

485485+

Figure 24 Auxiliary dry contact cables for output breaker in multi-module system

!

CAUTION

The auxiliary control wire must be installed to ensure proper operation of the system.
NOTE
For startup procedure, see the UPS operations and maintenance manual, SL-25210.

Figure 25 Dry contacts, multiple UPS modules with distribution panel

Input Distribution

UPS 1

UPS 2

UPS N

M3 Board
X3
Ext. Maint. Ext. Out

M3 Board
X3
Ext. Maint. Ext. Out

M3 Board
X3
Ext. Maint. Ext. Out

Q1Ext

Q2Ext

QnExt

QByp

QUPS

To Load

34

Options

5.3.7

Emergency Power Off (EPO)
The external emergency stop facility is identical to that described for the single unit installation—
that an individual emergency stop button is provided for each unit.

Figure 26 Connecting EPO push button

UPS2
X2:3
X2:4
X2:3
X2:4

Monitor Board

Monitor Board

UPS1
Normally
Open EPO
UPS2
X2:1
X2:2
X2:1
X2:2

Monitor Board

UPS1
Normally
Closed EPO

35

Monitor Board

Options

5.4

Battery Circuit Breaker Box
The box contains the same battery isolating circuit breaker as mounted in the battery cabinet.
Two battery circuit breaker boxes are available for use in installations where the battery is not
installed in the battery cabinet, in which case the appropriate battery box is fitted as close as possible
to the battery and connected to the UPS equipment as illustrated in Figure 27.
The battery circuit breaker box, is required to protect the battery from overcurrents. It also provides
electrical isolation between the UPS and the battery, permitting technical service personnel to reduce
the risks involved in maintenance work to a minimum.
A separate safety earth must be connected between the UPS unit and circuit breaker box.
Two boxes are available depending on the UPS power rating.
Table 7

Available battery circuit breaker boxes

UPS

Dimensions (in)
H-W-D

Circuit Breaker

10-15 kVA

32.25x20.25x8.3

70A

20-30 kVA

32.25x20.25x8.3

125A

The circuit breaker has the following features:
• Short-circuit protection.
• Protection against battery cabinet and ups connection errors (polarity reversal +/-).

36

Options

Figure 27 Battery circuit breaker box connections
3.9"
(98mm)

10.8"
(274mm)
5.4"

Connect to UPS Module
(field-installed)

(3) 1/2" (12.7mm)
dia. knockouts
for control wiring
conduit entry

2.5"
(63.5mm)

4.0"
(101.2mm)

J10.2
J10.3
(-)
Midpoint
(+)
(GND)

(137mm)

8.3"
(211.7mm)

Top View

1
2
3
4
5
6

20.0"
(508mm)
15.0"
(381mm)

Midpoint

TB1

(-)

CB
Load
Side

(+)

COM Black

TB1

N.O. Red

Circuit Breaker

N.C. Blue

72 Cells

Bottom View

(-)

72 Cells

From Customer’s Battery System
(field-supplied and field-installed)

Front View
.31" dia. (7.9mm)
(Typ. 4 places)

(-) (+)

(+)

31.5"
(800.1mm)

(+)

32.3"
(819.2mm)

(-)

(-) (+)

CB
Line
Side

.38"
(9.5mm)

(3) 1/2" (12.7mm)
dia. knockouts
for power wiring
conduit entry
(refer to top dimension)

.5"
(12.7mm)

1"
1.93"
(25.4mm) (49mm)

.46"
(11.8mm)

.62"
NOTES:
(15.8mm)
1. NEMA 1 enclosure provided which is suitable for
.47"
wall mounting only. Approximate weight is 60 lb.
(11.8mm)
2. Hardware for connecting cables to the breaker supplied.
3. Circuit breaker, Cutler-Hammer FD4125ED13D15A02 for 20/30 kVA;
Midpoint Busbar Detail
FD4070ED13D15A02 for 10/15 kVA
4. Color: IBM off-white.
5. Mount enclosure and pull all cables into enclosure before installing dry contacts.
6. Low voltage wiring needs to enter from the top of the enclosure, in separate conduit from power cables.
7. Line side power connections to lugs: (1) # 6AWG per connection for 10 to 15 kVA.
(1) # 2AWG per connection for 20-30 kVA to lugs:. load side power connections to busbars; see detail.
DPN U3813078
8. Power cables must be sized to limit voltage drop from battery system to UPS to be a maximum 4 VDC.

Rev. N

NOTE
1. The signal cables in this figure must be shielded and double-insulated.
2. Connect the Pes (Protection Earth) of the UPS cabinet and BCB box to the same point.

37

UPS Specifications

6.0

UPS SPECIFICATIONS
These specifications describe requirements for the Liebert NX UPS.

6.1

Conformity and Standards
The UPS has been designed to conform to the following standards:
•
•
•
•
•
•
•
•
•

IEEC1000-4-5
ASME
CSA 22.2, No. 107.1
FCC Part 15, Class A
ISO 9001
National Electrical Code (NFPA-70)
NEMA PE-1
OSHA
UL Standard 1778

The UPS system has UL and c-UL approval.

6.2

UPS Environmental
The UPS is designed to operate under the following environmental conditions without damage or degradation in electrical operating characteristics:
Table 8

Environmental characteristics
Rated Power

10-30kVA

Operating Temperature, UPS

32°F to 104°F (0°C to 40°C)

Optimal Operating Temperature, Battery

68°F to 86°F (20°C to 30°C)

Relative Humidity

0 to 95%, non-condensing

Acoustical Noise, dBA at 39 in. (1m)

54
≤1000m per IEC 62040/3

Altitude of Operation

6.3

Storage-Transport Temperature, UPS

-4°F to 158°F (-20°C to 70°C)

Storage-Transport Temperature, Battery

-4°F to 86°F (-20°C to 30°C)

UPS Mechanical Characteristics
Table 9

Mechanical characteristics
Parameter

10kVA

15kVA

20kVA

Width, in. (mm)

24 (600)

Depth, in. (mm)

32.5 (825)

Height, in. (mm)

63 (1600)

Weight Without Inner Batteries, lb. (kg)

450 (205)

550 (250)

550 (250)

UPS12-100 weight

954 (433)

954 (433)

1054 (478)

1054 (478)

UPS12-140 weight

1098 (498)

1098 (498)

1198 (543)

1198 (543)

2800 (0.82)

4200 (1.23)

5500 (1.61)

8300 (2.43)

384 (652)

558 (948)

522 (886)

834 (1417)

Heat Dissipation, BTU/H (kWH)
Airflow, CFM (m

450 (205)

30kVA

3/h)

Cable Entry

Bottom or top

Color

PMS 877

Protection Grade (with open/closed front doors)

IP 20

38

UPS Specifications

6.4

UPS Electrical Characteristics

Table 10

UPS terminal

Input (for single-input unit)
Unit
Rating

Nominal
Input
Current

Maximum
Input
Current

10

28

15

42

20
30

Maximum Recommended Lug

OCP
Current

OCP
Device
Rating

Bolt Size

Lug T&B
One Hole 54000

Lug T&B
One Hole REDDY

35

42

45

6M (1/4”)

54105

62204

53

63

70

6M (1/4”)

54106

62204

56

70

84

90

6M (1/4”)

54107

62204

83

104

125

125

6M (1/4”)

54152

62205

Bolt Size

Lug T&B
One Hole 54000

Lug T&B
One Hole REDDY

Rectifier input (for dual input unit only)
Maximum Recommended Lug

Unit
Rating

Nominal
Input
Current

Maximum
Input
Current

OCP
Current

OCP
Device
Rating

10

25

31

37

40

6M (1/4”)

54130

62204

15

37

47

57

60

6M (1/4”)

54106

62204

20

50

63

76

80

6M (1/4”)

54107

62204

30

75

94

113

125

6M (1/4”)

54152

62205

Bypass input (for dual input units)
Maximum Recommended Lug
Unit
Rating

Nominal
Input
Current

OCP
Current

OCP
Device
Rating

Bolt Size

Lug T&B
One Hole
54000

Lug T&B
One Hole
REDDY

10

28

35

35

6M (1/4”)

54105

62204

15

42

53

60

6M (1/4”)

54106

62204

20

56

70

70

6M (1/4”)

54107

62204

30

83

104

110

6M (1/4”)

54152

62205

Unit
Rating

Nominal
Output
Current

OCP
Current

OCP
Device
Rating

Bolt Size

Lug T&B
One Hole 54000

Lug T&B
One Hole REDDY

10

28

35

35

6M (1/4”)

54130

62204

15

42

53

60

6M (1/4”)

54106

62204

20

56

70

70

6M (1/4”)

54106

62204

30

84

105

110

6M (1/4”)

54108

62205

Bolt Size

Lug T&B
One Hole 54000

Lug T&B
One Hole REDDY

Output
Maximum Recommended Lug

Battery
Maximum Recommended Lug

Unit
Rating

Battery
Current

OCP
Current

OCP
Device
Rating

10/15

55

55

70

6M (1/4”)

54106

62204

20/30

110

110

125

8M (5/16”)

54153

62212

39

UPS Specifications

6.4.1

Battery Manufacturers and Models
Either of two manufacturers’ batteries will be installed in the NX 10-30 kVA 208V as shipped. Below
are the battery makers and the models they supply.
Table 11

Approved batteries

Battery Manufacturer

Models Supplied

Enersys Yuasa
C&D Dynasty

6.4.2

NPX-80FR

NPX-100FR

NPX-150FR

UPS12-100MR

UPS12-140MR

-

Input Rectifier
Table 12

Rectifier input power
Rated Power

10kVA

15kVA

Rated Voltage, VAC

20kVA

Supply

3-phase, 4-wire plus ground

Input Voltage Tolerance, VAC (without derating)

166-239

Frequency, Hz

50 / 60

Input Frequency Tolerance %

±10
≤ 0.99 at full load
≤ 0.95 at 50% load

Power Factor
Harmonic Current

Less than 4% at full rated UPS output load

Input Current,1 Nominal, A

28

42

56

83

Output Current, Nominal, A

28

42

56

83

Notes:
1. Overload capacity of input current:

6.4.3

30kVA

120/208

100% Imax 150%: Limits input current immediately

DC Intermediate Circuit
Table 13

DC intermediate circuit
Rated Power

Recommended number of lead-acid batteries

10kVA

15kVA

20kVA

30kVA

Number of batteries is 24 jars (12V per jar), or 144 cells (2V per
cell) for VRLA. The unit is shipped with a nominal voltage of
288VDC.

Recommended float charge voltage

2.27VDC*

Recommended boost charge voltage

2.3VDC*

Recommended end of discharge voltage

1.65-1.8 VDC

Maximum recharge battery current, A

7.5

Maximum boost charge duration, min.*

7.5

15
1440

Boost-float threshold current, A*

0.1 C default

Temperature voltage compensation, mV/°C*

3
≤1

Ripple voltage superimposed %
* Set by configuration software and based on usage of VLRA batteries.

40

15

UPS Specifications

6.4.4

Inverter Output

Table 14

Inverter output
Rated Power

10kVA

15kVA

Rated voltage, VAC

20kVA
120/208

Supply

3-phase, 4-wire plus ground

Frequency, Hz
Rated Power, kW

50 / 60
8

12

16

24

10 minutes - 105-125% load

Three -phase transient overload,
min. load

1 minute - 126-150% load

Voltage Regulation %

±1.0% three-phase RMS average for a balanced three-phase load
±2.0% three-phase RMS average for a 100% unbalanced load

Frequency Regulation %

Nominal frequency regulation is ±0.05% in single module mode,
and+/- 0.25% in parallel mode.

Maximum rate of change of
frequency, Hz/sec

For single mode, the slew rate is adjustable from 0.1Hz/s to 3Hz/s

Current rating of neutral cable, A

6.4.5

30kVA

1.5 x input current

Bypass Input

Table 15

Bypass input
Rated Power

10kVA

15kVA

Rated voltage, VAC

20kVA

30kVA

120/208

Supply

Three-phase, 4-wire plus ground

Rated Current, A
208VAC
Bypass voltage tolerance %

28

42

Upper limit: +10%, +15% or +20%
Lower limit: -10%, -20%, -30% or -40%

Frequency, Hz

83

Upper limit default: +15%
Lower limit default: -20%

50 / 60

Input frequency tolerance %

± 10 or ± 20%; default ±10%

Current rating of neutral cable, A
Bypass overload capacity
(all ratings)

56

1.5 x input current
Time
Long-term operation:
10 minutes:
100milliseconds:

41

Load
<135% load
135% - 170% load
1000% full UPS rated output current

Installation Drawings

7.0

INSTALLATION DRAWINGS
The diagrams in this section illustrate the key mechanical and electrical characteristics of the NX
UPS System cabinets.

Figure 28 Dimensional view- front and left side views
600

825
10mm dia. threaded
mounting holes

Monitoring
Panel

Leveler
1600
Detail “A” Rear of unit
shown without side panel
Air intake area.
Do not block
air filter.

90
FRONT VIEW

LEFT SIDE VIEW

Adjustable Stops
(see Note 11)

1. All dimensions are in millimeters.
2. A minimum of 24 inches clearance above the unit is required for air exhaust.
3. Installation and service access required. Left-side access recommended for maximum ease of
installation.
4. Keep cabinet within 15 degrees of vertical while handling.
5. Top and bottom cable entry available through removal access plates. Remove punch to suit conduit size
and replace.
6. Unit bottom is structurally adequate for forklift handling.
7. Open door to replace air filter, washable type, size 354x314.
8. Threaded mounting holes used for seismic anchoring or floor stand. Note: If a floor stand is used, the
weight of the unit must be supported under all casters.
9. Each mounting location is supported by two 10 GA. (.135”) galvanized steel. The threaded 12mm insert
is approximately 3/4” deep. Mounting bolts must be threaded into unit.
10. Includes side panel. Refer to Detail A for dimension to frame with side panel removed. Side panels are
removed between adjacent units that are bolted together.
11. Adjustable stops are not designed to carry the full weight of the cabinet. Finger-tighten stop against the
floor, then tighten with a wrench less than two turns for friction against the floor.

42

Installation Drawings

Figure 29 Dimensions continued—top and bottom views
10mm dia. threaded
mounting holes 4 (typ).
See Notes 8 and 9 above.

Rear stabilizing foot

Air
Air Exhaust
Power Cable
Entry Area
Top and
Bottom

TOP VIEW

BOTTOM VIEW

Figure 30 Main components—typical unit
Parallel Board (M3)
Monitor
Board
(U2)

Power
Electronics

IntelliSlot
Communication
Ports

Input
Breaker
Rotary
System
Switch

Battery
Trays

Input Breaker
Access Plate

Internal and
External Battery
Terminal Block
Access Plate

Front View
(with door open)
43

DPN U3812048
Rev. 1

Installation Drawings

Figure 31 Cable connections
AC output cable
connections
Bypass AC input cable
connections

Input Neutral Bus
(side view)

Input/Output
Neutral

Output Neutral Bus
(side view)

Earth

Power Earth
(side view)

Battery connections (+ N -)
4.1 to battery
4.2 to external battery cabinet
NOTES

1. All dimensions are millimeters.
2. Top and bottom cable entry available through removable access plates. Remove, punch to
accommodate conduit size and replace.
3. Control wiring and power wiring must be run in separate conduit. Output and input cables must be
run in separate conduit.
4. Aluminum and copper-clad aluminum cables are not recommended,
5. All wiring is to be in accordance with national and local electrical codes.

44

Installation Drawings

Figure 32 Location of internal batteries

Battery

186mm

417mm

687mm

45

Installation Drawings

Figure 33 Battery connections
DYNASTY BATTERY

TOP LAYER

MIDDLE LAYER

W506 to W507

W501 3pcs

+

-

+

-

+

-

+

-

-

+

-

+

-

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

+

-

+

W500 18pcs

W510 to W511

W502 to W503 W503 to W502

W504 to W505

BOTTOM LAYER

W511 to W510
W507 to W506
W509 to W508

+

N

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

+

-

CON4

W505 to W504

46

W508 to W509

Installation Drawings

Negative (-)

Positive (+)

Refer to Table 16 for key to interconnection

Midpoint (N)

Figure 34 Battery cabinet interconnection

Positive (+)
Midpoint (N)
Negative (-)

Breaker
Detail

Connection
Detail

Breaker
Detail

A

A
B

B
B

OR

A
UPS Module
Front View
with doors removed

27" Battery Cabinet
Front View
without doors and
protective plates

59" Battery Cabinet
Front View
without doors and
protective plates

NOTES:

1. All Liebert-supplied cable must be repositioned prior to and while the cabinets are being placed in
their final installed location.
2. All interconnection hardware supplied by Liebert
3. All interconnection cables supplied by Liebert when bolted together.
4. Interconnection cables field-supplied when battery cabinets are stand-alone.
5. Refer to the individual drawing of each piece of equipment for additional details.
Table 16
Run

Liebert -supplied interconnect wiring
From

To

Conductors

A

UPS battery terminal block

External 27" or 59" battery cabinet

Positive, midpoint, negative

B

Battery cabinet terminal block

UPS monitor board

Battery breaker aux contacts

47

Installation Drawings

Figure 35 Maintenance Bypass interconnection
Refer to Table 17 for key to interconnection

Maintenance Bypass/Transformer Cabinet
front view without front door and panel

UPS Module
left-side view without side panel

NOTES

1. All Liebert-supplied cable must be repositioned prior to and while the cabinets are being placed in their
final installed location.
2. All interconnection hardware supplied by Liebert.
3. AC connections must be made to the UPS module before attaching maintenance bypass/transformer
cabinet to UPS module.
4. Utility AC source neutral not required for maintenance bypass/transformer cabinet types D, E, M, N.
5. All cabling will be field-supplied when maintenance bypass/transformer cabinet is configured as standalone cabinet.
6. Maintenance bypass/transformer cabinets must attach to the left side only.
7. Refer to the individual drawing of each piece of equipment for additional details.
Table 17
Run

Liebert-supplied interconnect wiring for Maintenance Bypass Cabinet
From

To

Conductors

A

Utility AC source

Maintenance

Ph A, B, C bypass/ transformer cabinet

B

Utility AC source

Maintenance

Neutral bypass/ transformer cabinet

C

Maintenance

UPS module AC input

Neutral - UPS Input

D

Maintenance

UPS module AC input

Ph A, B, C - UPS Input

E

UPS module AC output

Maintenance

Ph A, B, C - UPS Output

F

UPS module AC output

Maintenance

Neutral - UPS Output

G

Maintenance

Load AC connection

Neutral bypass cabinet

H

Maintenance

Load AC connection

Ph A, B, C bypass cabinet

I

Utility AC source

All ground connections

Ground

J

Monitoring terminal block

UPS Parallel Logic Board (M3)

Bypass contacts

48

Installation Drawings

Figure 36 NX 1+1 parallel cabinet interconnections

1+1 Parallel Cabinet
(Front View Without Front Door and Panel)
J

J

J
A

D1
D2

E1,E2
F1,F2

C

H

F1, F2

K1,K2

D1
D2

H

B

B
F1,F2
G

I

G

H

K1
K2

I

D1,D2

A

D1
D2
G
F1,F2

I
E1,E2

I
UPS Module Left Side View
(Without Side Panel)

Type A00

Type BR0

Type DR1 & CR1

NOTES:

1. All Liebert-supplied cable will need to be repositioned prior to and while setting the cabinets in their
installed location.
2. All interconnection cable and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching paralleling cabinet to UPS modules.
4. Utility AC source neutral not required for maintenance bypass/transformer cabinet type CR1.
5. Paralleling cabinets must between both UPS modules.
6. Refer to the individual drawing of each piece of equipment for additional details
Table 18
Run

Liebert-supplied interconnect wiring

From

To

Conductors

Cabinet Type

A

Utility AC Source

Paralleling Cabinet

PH A, B, C - Bypass

BR0, CR1, DR1

B

Utility AC Source

Paralleling Cabinet

Neutral - Bypass

BR0, CR1, DR1

C

Utility AC Source

UPS Module AC Input

PH A,B,C - UPS

A00, BR0

D1

UPS #1 Module AC Output

Paralleling Cabinet

PH A, B, C - UPS

A00, BR0, CR1, DR1

D2

UPS #2 Module AC Output

Paralleling Cabinet

PH A, B, C - UPS

A00, BR0, CR1, DR1

E

Utility AC Source

UPS #1 Module AC Input

Neutral - UPS Input

A00, BR0, CR1, DR1

E2

Utility AC Source

UPS #1 Module AC Input

Neutral - UPS Input

A00, BR0, CR1, DR1

F1

Paralleling Cabinet

UPS #1 Module AC Output

Neutral - UPS Output

A00, BR0, CR1, DR1

F2

Paralleling Cabinet

UPS #1 Module AC Output

Neutral - UPS Output

A00, BR0, CR1, DR1

G

Paralleling Cabinet

Load AC Connection

Neutral - Load

A00, BR0, CR1, DR1

H

Paralleling Cabinet

Load AC Connection

PH A, B, C - Load

A00, BR0, CR1, DR1

I

Utility AC Source

All Ground Connections

Ground

A00, BR0, CR1, DR1

J

Monitoring Terminal Block

UPS Parallel Logic Board (M3)

Auxiliary Contacts

A00, BR0, CR1, DR1

K1

UPS #1 Module AC Input

Paralleling Cabinet

PH A, B, C - UPS

CR1, DR1

K2

UPS #1 Module AC INPUT

Paralleling Cabinet

PH A, B, C - UPS

CR1, DR1

49

Installation Drawings

Figure 37 Lineup detail—SlimLine distribution cabinet to NX

E

H
A
C

H
G
B

D
D
G

E
H
NOTES:

1. All Liebert-supplied cable will need to be repositioned prior to and while setting the cabinets in their
installed location.
2. All interconnection cables and hardware supplied by Liebert.
3. AC connections must be made to the UPS module before attaching.
4. See Figure 45 for placement of distribution cabinet.
5. Refer to the individual drawing of each piece of equipment for additional details.
Table 19
Run

Liebert-supplied interconnect wiring—SlimLine distribution cabinet to NX

From

To

Conductors

A

Distribution Cabinet

Load AC Connection

Isolated Ground

B

Distribution Cabinet

Load AC Connection

Neutral
Distribution Cabinet

C

Distribution Cabinet

Load AC Connection

Ground
Distribution Cabinet

D

Distribution Cabinet

Load AC Connection

PH A,B,C

E

UPS Module AC Output

Distribution Cabinet

PH A, B, C

G

UPS Module AC Output

Distribution Cabinet

Neutral

H

UPS Module AC Output

All Ground Connections

Ground

50

Installation Drawings

Figure 38 Lineup detail—1+N Type A connection to NX

1 + N Parallel Cabinet
(front view without front door and panel)

1. All Liebert-supplied cable must be repositioned prior to and while setting the cabinets in their installed
location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching paralleling cabinet to UPS modules
4. The interconnecting output cables between the paralleling cabinet and the UPSes must be the same size
and the same length.
5. The location of the system output neutral busbar (connection K) and the ground busbar (connections H, I
and J) are shown for a left-access style. For right-access version, these busbars are at opposite locations
6. Refer to the individual drawing of each piece of equipment for additional details.
Table 20

Interconnect wiring—1+N Type A connection to NX

RUN

FROM

TO

CONDUCTORS

A1-A4

Utility AC Source

UPS #1-UPS #4 Module AC Input

Ph A, B, C - UPS Input

B1-B4

Utility AC Source

UPS #1-UPS #4 Module AC Input

Neutral - UPS Input

C1-C4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C- UPS Output

D1-D4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Neutral - UPS Output

E1-E4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ground-UPS

F

Paralleling Cabinet

Load AC Connection

Ph A, B, C - Load

G

Paralleling Cabinet

Load AC Connection

Ground-Load

H

Paralleling Cabinet

Load AC Connection

Neutral-Load

Paralleling Cabinet

UPS #1-UPS #4 Module
Parallel Logic Board (M3)

Output Breaker Aux Contact

I1-I4

51

Installation Drawings

Figure 39 Lineup detail—1+N Type A1 connection to NX

1 + N Parallel Cabinet
(front view without front door and panel)

1 + N Cabinet Interior View
(neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while
setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. The interconnecting input cables between the paralleling cabinet
and the UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet
and the UPSes must be the same size and the same length.
6. The location of the system output neutral busbar (connection K)
and the ground busbar (connections H, I and J) are shown for a
left-access style. For right-access version, these busbars are at
opposite locations.
7. Refer to the individual drawing of each piece of equipment for
additional details.
UPS Module Left Side View
(without side panel)

Table 21

Interconnect wiring—1+N Type A1 connection to NX

Run

From

To

Conductors

A

Utility AC Source

Paralleling Cabinet

Ph A, B, C - System Input

B

Utility AC Source

Paralleling Cabinet

Ground - System Input

C

Utility AC Source

Paralleling Cabinet

Neutral - System Input

D1-D4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ph A, B, C- UPS Input

E1-E4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Neutral - UPS Input

F1-F4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C - UPS Output

G1-G4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Neutral - UPS Output

H1-H4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ground - UPS

I

Paralleling Cabinet

Load AC Connection

Ph A, B, C - Load

J

Paralleling Cabinet

Load AC Connection

Ground - Load

K

Paralleling Cabinet

Load AC Connection

Neutral - Load

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Output Breaker Aux Contact

L1-L4

52

Installation Drawings

Figure 40 Lineup detail—1+N Type B connection to NX
I1, I2

1 + N Parallel Cabinet
(front view without front door and panel)

1 + N Cabinet Interior View
(neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and
while setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before
attaching paralleling cabinet to UPS modules.
4. The interconnecting output cables between the paralleling
cabinet and the UPSes must be the same size and the same
length.
5. The location of the system output neutral busbar (connection
K) and the ground busbar (connections H, I and J) are shown
for a left-access style. For right-access version, these busbars
are at opposite locations.
6. Refer to the individual drawing of each piece of equipment for
additional details.

UPS Module Left Side View
(without side panel)
Table 22

Interconnect wiring—1+N Type B connection to NX

Run

From

To

Conductors

A1-A4

Utility AC Source

UPS #1-UPS #4 Module AC Input

Ph A, B, C - UPS Input

B1-B4

Utility AC Source

UPS #1-UPS #4 Module AC Input

Neutral - UPS Input

C1-C4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C - UPS Output

D1-D4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Neutral - UPS Output

E1-E4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ground-UPS

F

Paralleling Cabinet

Load AC Connection

Ph A, B, C - Load

G

Paralleling Cabinet

Load AC Connection

Ground-load

H

Paralleling Cabinet

Load AC Connection

Neutral-load

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Output Breaker Aux Contact

I1-I4

53

Installation Drawings

Figure 41 Lineup detail—1+N Type B1 connection to NX

1 + N Cabinet Side View
(without side panel or door)

UPS Module Left Side View
(without side panel)

Table 23

1 + N Parallel Cabinet
(front view without front door and panel)

1 + N Cabinet Interior View
(neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while
setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. The interconnecting input cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
6. The location of the system output neutral busbar (connection K) and
the ground busbar (connections H, I and J) are shown for a left-access
style. For right-access version, these busbars are at opposite locations.
7. Refer to the individual drawing of each piece of equipment for
additional details.

Interconnect wiring—1+N Type B1 connection to NX

Run

From

To

Conductors

A
B

Utility AC Source

Paralleling Cabinet

Ph A, B, C - System Input

Utility AC Source

Paralleling Cabinet

Ground - System Input

C

Utility AC Source

Paralleling Cabinet

Neutral -system Input

D1-D4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Ph A, B, C - UPS Input

E1-E4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Neutral - UPS Input

F1-F4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C - UPS Output

G1-G4 UPS #1-UPS #4 Module AC Output
H1-H4

Paralleling Cabinet

Paralleling Cabinet

Neutral - UPS Output

UPS #1-UPS #4 Module AC Ground

Ground-UPS

I

Paralleling Cabinet

Load AC Connection

Ph A, B, C - Load

J

Paralleling Cabinet

Load AC Connection

Ground-load

K

Paralleling Cabinet

Load AC Connection

Neutral-Load

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Output Breaker Aux Contact

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Rotary Switch Aux Contact

L1-L4
M1-M4

54

Installation Drawings

Figure 42 Lineup detail—1+N Type C connection to NX

1 + N Cabinet Side View
(without side panel or door)

1 + N Parallel Cabinet
(front view without front door and panel)

1. All Liebert-supplied cable must be repositioned prior to and while
setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. Utility AC source neutral not required for maintenance bypass/
transformer cabinet Type C.
5. The interconnecting input cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
6. The interconnecting output cables between the paralleling cabinet
and the UPSes must be the same size and the same length.
7. The location of the system output neutral busbar (connection K) and
the ground busbar (connections H, I and J) are shown for a left-access
style. For right-access version, these busbars are at opposite locations.
8. Refer to the individual drawing of each piece of equipment for
additional details.

UPS Module Left Side View
(without side panel)

Table 24

1 + N Cabinet Interior View
(neutral and ground busbar location)

Interconnect wiring—1+N Type C connection to NX

Run

From

To

Conductors

A

Utility AC Source

Paralleling Cabinet

Ph A, B, C-system Input

B

Utility AC Source

Paralleling Cabinet

Ground - System Input

C1-C4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Ph A ,B, C - UPS Input

D1-d4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Neutral - UPS Input

E1-E4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C - UPS Output

G1-G4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Neutral - UPS Output

H1-H4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ground - UPS

I

Paralleling Cabinet

Load AC Connection

Ph A ,B, C - Load

J

Paralleling Cabinet

Load AC Connection

Ground - Load

K

Paralleling Cabinet

Load AC Connection

Neutral - Load

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Output Breaker Aux Contact

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Rotary Switch Aux Contact

L1-l4
M1-M4

55

Installation Drawings

Figure 43 Lineup detail—1+N Type C1 connection to NX

1 + N Cabinet Interior View
(neutral and ground busbar location)

1 + N Cabinet Side View
1 + N Parallel Cabinet
(without side panel or door) (front view without front door and panel)

UPS Module Left Side View
(without side panel)

Table 25

1. All Liebert-supplied cable must be repositioned prior to and while setting
the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to UPS modules.
4. The interconnecting input cables between the paralleling cabinet and the
UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet and the
UPSes must be the same size and the same length.
6. The location of the system output neutral busbar (connection K) and the
ground busbar (connections H, I and J) are shown for a left-access style.
For right-access version, these busbars are at opposite locations.
7. Refer to the individual drawing of each piece of equipment for additional
details.

Interconnect wiring—1+N Type C1 connection to NX

Run

From

To

Conductors

A
B

Utility AC Source

Paralleling Cabinet

Ph A, B, C - System Input

Utility AC Source

Paralleling Cabinet

Ground - System Input

C

Utility AC Source

Paralleling Cabinet

Neutral -System Input

D1-D4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Ph A, B, C - UPS Input

E1-E4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Neutral - UPS Input

F1-F4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C - UPS Output

G1-G4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Neutral - UPS Output

H1-H4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ground-UPS

I

Paralleling Cabinet

Load AC Connection

Ph A, B, C - Load

J

Paralleling Cabinet

Load AC Connection

Ground-Load

K

Paralleling Cabinet

Load AC Connection

Neutral- Load

L1-L4

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Output Breaker Aux Contact

56

Installation Drawings

Figure 44 Lineup detail—1+N Type D connection to NX

1 + N Parallel Cabinet
1 + N Cabinet Side View
(without side panel or door) (front view without front door and panel)

UPS Module Left Side View
(without side panel)

Table 26

1 + N Cabinet Interior View
(neutral and ground busbar location)

1. All Liebert-supplied cable must be repositioned prior to and while
setting the cabinets in their installed location.
2. All interconnection cables and hardware supplied by others.
3. AC connections must be made to the UPS modules before attaching
paralleling cabinet to the UPS modules.
4. The interconnecting input cables between the paralleling cabinet and
the UPSes must be the same size and the same length.
5. The interconnecting output cables between the paralleling cabinet and
the UPSes must be the same size and the same length
6. The location of the system output neutral busbar (connection K) and the
ground busbar (connections H, I and J) are shown for a left-access style.
For right-access version, these busbars are at opposite locations.
7. Refer to the individual drawing of each piece of equipment for additional
details.

Interconnect wiring—1+N Type D connection to NX

Run

From

To

Conductors

A

Utility AC Source

Paralleling Cabinet

Ph A, B, C - System Input

B

Utility AC Source

Paralleling Cabinet

Ground - System Input

C

Utility AC Source

Paralleling Cabinet

Neutral - System Input

D1-D4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Ph A, B, C - UPS Input

E1-E4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Input

Neutral - UPS Input

F1-F4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Ph A, B, C - UPS Output

G1-G4

UPS #1-UPS #4 Module AC Output

Paralleling Cabinet

Neutral - UPS Output

H1-H4

Paralleling Cabinet

UPS #1-UPS #4 Module AC Ground

Ground - UPS

I

Paralleling Cabinet

Load AC Connection

Ph A, B, C - Load

J

Paralleling Cabinet

Load AC Connection

Ground - Load

K

Paralleling Cabinet

Load AC Connection

Neutral -L oad

L1-L4

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Output Breaker Aux Contact

M1-M4

Paralleling Cabinet

UPS #1-UPS #4 Module
UPS Parallel Logic Board (M3)

Rotary Switch Aux Contact

57

Installation Drawings

MBC

UPS

UPS

Battery

1+N
Paralleling
Cabinet

58

1+N
Paralleling
Cabinet

SlimLine

SlimLine

Battery

MBC

SlimLine

SlimLine

UPS

UPS

SlimLine

UPS

SlimLine

SlimLine

Figure 45 SlimLine locations

Specifications and Technical Data

8.0

SPECIFICATIONS AND TECHNICAL DATA

8.1

Lug Size and Torque Requirements
Use commercially available solderless lugs for the wire size required for your application. Refer to
Table 27. Connect wire to the lug using tools and procedures specified by the lug manufacturer.
Table 27

Torque specifications

Nut and Bolt CombinationS
Grade 2 Standard

Electrical Connections
with Belleville Washers

Bolt Shaft Size

Lb-in

N-m

Lb-in

N-m

1/4
5/16
3/8
1/2

53
107
192
428

6.0
12
22
22

46
60
95
256

5.2
6.8
11
29

Circuit Breakers With Compression Lugs (For Power Wiring)
Wire Size or Range
Lb-in
#6 - #4
#3 - #1
1/0 - 2/0
3/0 - 200 MCM
250 - 400 MCM
500 - 700 MCM

100
125
150
200
250
300

Circuit Breakers With Compression Lugs (For Power Wiring)
Current Rating
Lb-in
400 - 1200 Amps

300.00

Terminal Block Compression Lugs (For Control Wiring)
AWG Wire Size or Range
Lb-in
#22 -#14

3.5 to 5.3

N-m
11
14
17
23
28
34
N-m
34.00
N-m
0.4 to 0.6

NOTE: Use the values in this table unless the equipment is labeled with a different torque value.

Table 28

Battery torque rating

Battery

Initial Torque
in-lb (N-m)

Annual Torque
in-lb (N-m)

UPS12-100MR

40 (4.5)

32 (3.48)

UPS12-140MR

40 (4.5)

32 (3.48)

UPS12-200MR

40 (4.5)

32 (3.48)

UPS12-270MR

40 (4.5)

32 (3.48)

UPS12-310MR

65 (7.4)

52 (5.88)

UPS12-370MR

65 (7.4)

52 (5.88)

UPS12-475MR

110 (12.4)

110 (12.4)

59

Specifications and Technical Data

Table 29

kVA Type

Maintenance bypass cabinet electrical data (single input)
Maintenance
Bypass
I/P Voltage
(VAC)

Bypass Cabinet
Max Input
Current

Cabinet
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output
OCP CB Size (A)

30

A, J

208

104

125

208

83

125

30

B, K

480

47

60

208

83

125

30

B, K

600

37

50

208

83

125

30

B, K

220

101

125

208

83

125

30

C, L

480

48

60

480

36

50

30

C, L

600

38

50

600

29

40

30

C, L

220

105

125

220

79

100

30

D, M

480

47

60

208

83

125

30

D, M

600

38

50

208

83

125

30

D, M

208

108

150

208

83

125

30

D, M

220

103

125

208

83

125

30

D, M

240

93

125

208

83

125

30

E, N

480

48

60

480

36

50

30

E, N

600

39

50

600

29

40

30

E, N

220

106

125

220

79

100

20

A, J

208

69

90

208

56

70

20

B, K

480

31

40

208

56

70

20

B, K

600

25

30

208

56

70

20

B, K

220

68

90

208

56

70

20

C, L

480

32

40

480

24

30

20

C, L

600

26

40

600

19

30

20

C, L

220

70

90

220

52

70

20

D, M

480

31

40

208

56

70

20

D, M

600

25

40

208

56

70

20

D, M

208

72

90

208

56

70

20

D, M

220

68

90

208

56

70

20

D, M

240

62

80

208

56

70

20

E, N

480

32

40

480

24

30

20

E, N

600

26

40

600

19

30

20

E, N

220

70

90

220

52

70

15

A, J

208

52

70

208

42

60

15

B, K

480

23

30

208

42

60

15

B, K

600

19

30

208

42

60

15

B, K

220

51

70

208

42

60

15

C, L

480

24

30

480

18

30

15

C, L

600

19

30

600

14

20

15

C, L

220

52

70

220

39

50

15

D, M

480

23

30

208

42

60

15

D, M

600

19

30

208

42

60

15

D, M

208

54

70

208

42

60

15

D, M

220

51

70

208

42

60

60

Specifications and Technical Data

Table 29

kVA Type

Maintenance bypass cabinet electrical data (single input) (continued)
Maintenance
Bypass
I/P Voltage
(VAC)

Bypass Cabinet
Max Input
Current

Cabinet
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output
OCP CB Size (A)

15

D, M

240

47

60

208

42

60

15

E, N

480

24

30

480

18

30

15

E, N

600

19

30

600

14

20

15

E, N

220

53

70

220

39

50

10

A, J

208

35

50

208

28

40

10

B, K

480

16

20

208

28

40

10

B, K

600

12

15

208

28

40

10

B, K

220

34

50

208

28

40

10

C, L

480

16

20

480

12

15

10

C, L

600

13

20

600

10

15

10

C, L

220

35

50

220

26

40

10

D, M

480

16

20

208

28

40

10

D, M

600

13

15

208

28

40

10

D, M

208

36

50

208

28

40

10

D, M

220

34

50

208

28

40

10

D, M

240

32

40

208

28

40

10

E, N

480

16

20

480

12

15

10

E, N

600

13

20

600

10

15

10

E, N

220

35

50

220

26

40

Table 30

Maintenance bypass cabinet electrical data (dual input)

System
Rectifier
Rectifier
Bypass
Bypass
I/P Voltage Max Input Input OCP Max Input Input OCP O/P Voltage
Nominal O/P
Output OCP
kVA Type
(VAC)
Current CB Size (A) Current CB Size (A)
(VAC)
Current Rating (A) CB Size (A)
30

F, P

480

42

50

30

F, P

600

33

40

30

F, P

208

95

125

30

F, P

220

90

125

30

F, P

240

83

20

F, P

480

20

F, P

600

20

F, P

20
20

47

50

208

83

125

37

40

208

83

125

107

125

208

83

125

101

125

208

83

125

100

93

100

208

83

125

28

40

31

40

208

55

70

22

30

25

30

208

56

70

208

64

80

71.5

80

208

56

70

F, P

220

61

80

68

70

208

56

70

F, P

240

56

70

62

70

208

56

70

61

Specifications and Technical Data

Table 30

Maintenance bypass cabinet electrical data (dual input)

System
Rectifier
Rectifier
Bypass
Bypass
I/P Voltage Max Input Input OCP Max Input Input OCP O/P Voltage
Nominal O/P
Output OCP
kVA Type
(VAC)
Current CB Size (A) Current CB Size (A)
(VAC)
Current Rating (A) CB Size (A)
15

F, P

480

21

30

24

30

208

42

60

15

F, P

600

17

30

19

20

208

42

60

15

F, P

208

49

60

54

60

208

42

60

15

F, P

220

46

60

51

60

208

42

60

15

F, P

240

42

60

47

50

208

42

60

10

F, P

480

14

20

16

20

208

28

40

10

F, P

600

12

15

13

15

208

28

40

10

F, P

208

33

40

36

40

208

28

40

10

F, P

220

31

40

34

40

208

28

40

10

F, P

240

29

40

32

40

208

28

40

Table 31
System
Size

Multi-module bypass cabinet electrical data

kVA

System
I/P Voltage
(VAC)

System
Max Input
Current

System
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output OCP
CB Size (A)

30

208

104

125

208

83

125

20

208

70

90

208

56

70

15

208

53

70

208

42

60

10

208

35

45

208

28

40

CR1

30

208

107

150A

208

83

125

CR1, DR1

30

220

101

150A

208

83

125

CR1, DR1

30

480

46

70A

208

83

125

CR1, DR1

30

600

37

60A

208

83

125

CR1

20

208

71

100A

208

56

70

CR1, DR1

20

220

68

100A

208

56

70

CR1, DR1

20

480

31

50A

208

56

70

CR1, DR1

20

600

25

40A

208

56

70

Type

A00, BR0

1+1

CR1

15

208

54

80A

208

42

60

CR1, DR1

15

220

51

80A

208

42

60

CR1, DR1

15

480

23

40A

208

42

60

CR1, DR1

15

600

19

30A

208

42

60

CR1

10

208

36

60A

208

28

40

CR1, DR1

10

220

34

50A

208

28

40

CR1, DR1

10

480

16

30A

208

28

40

CR1, DR1

10

600

12

20A

208

28

40

62

Specifications and Technical Data

Table 31
System
Size

Multi-module bypass cabinet electrical data (continued)

Type

A00, BR0
2+0

kVA

System
I/P Voltage
(VAC)

System
Max Input
Current

System
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output OCP
CB Size (A)

30

208

104

125

208

167

225

20

208

70

90

208

111

150

15

208

53

70

208

83

125

10

208

35

45

208

56

70

CR1

30

208

73

100A

208

167

225

CR1, DR1

30

220

69

100A

208

167

225

CR1, DR1

30

480

32

50A

208

167

225

CR1, DR1

30

600

25

40A

208

167

225

CR1

20

208

110

150A

208

111

150

CR1, DR1

20

220

104

150A

208

111

150

CR1, DR1

20

480

48

70A

208

111

150

CR1, DR1

20

600

38

50A

208

111

150

CR1

15

208

146

200A

208

83

125

CR1, DR1

15

220

138

200A

208

83

125

CR1, DR1

15

480

63

80A

208

83

125

CR1, DR1

15

600

51

70A

208

83

125

CR1

10

208

219

300A

208

56

70

CR1, DR1

10

220

207

300A

208

56

70

CR1, DR1

10

480

95

125A

208

56

70

CR1, DR1

10

600

76

100A

208

56

70

30

208

210

300

208

167

225

20

208

140

200

208

111

150

15

208

105

150

208

83

125

10

208

70

100

208

56

70

SR0, W00

63

Specifications and Technical Data

Table 31
System
Size

Multi-module bypass cabinet electrical data (continued)

Type

E00, FR0

2+1

G01, GR1

HR1

TR0, X00

kVA

System
I/P Voltage
(VAC)

System
Max Input
Current

System
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output OCP
CB Size (A)

30

208

104

125

208

167

225

20

208

70

90

208

111

150

15

208

53

70

208

83

125

10

208

35

45

208

56

70

10

208

73

100

208

56

70

10

220

69

100

208

56

70

10

480

32

50

208

56

70

10

600

25

40

208

56

70

15

208

110

150

208

83

125

15

220

104

150

208

83

125

15

480

47

70

208

83

125

15

600

38

50

208

83

125

20

208

146

200

208

111

150

20

220

138

200

208

111

150

20

480

63

100

208

111

150

20

600

51

70

208

111

150

30

208

219

300

208

167

225

30

220

207

300

208

167

225

30

480

95

125

208

167

225

30

600

76

100

208

167

225

10

220

68

100

208

56

70

10

480

31

50

208

56

70

10

600

25

40

208

56

70

15

220

102

150

208

83

125

15

480

47

70

208

83

125

15

600

38

50

208

83

125

20

220

137

200

208

111

150

20

480

63

100

208

111

150

20

600

50

70

208

111

150

30

220

205

300

208

167

225

30

480

94

125

208

167

225

30

600

75

100

208

167

225

30

208

210

300

208

167

225

20

208

140

200

208

111

150

15

208

105

150

208

83

125

10

208

70

100

208

56

70

64

Specifications and Technical Data

Table 31
System
Size

Multi-module bypass cabinet electrical data (continued)

Type

E00, FR0

3+0

G01, GR1

HR1

TR0, X00

kVA

System
I/P Voltage
(VAC)

System
Max Input
Current

System
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output OCP
CB Size (A)

30

208

104

125

208

250

400

20

208

70

90

208

167

225

15

208

53

70

208

125

200

10

208

35

45

208

83

125

10

208

110

150

208

83

125

10

220

104

150

208

83

125

10

480

47

60

208

83

125

10

600

38

50

208

83

125

15

208

164

225

208

125

200

15

220

155

200

208

125

200

15

480

71

90

208

125

200

15

600

57

80

208

125

200

20

208

219

300

208

167

225

20

220

207

300

208

167

225

20

480

95

125

208

167

225

20

600

76

100

208

167

225

30

208

329

500

208

250

400

30

220

311

400

208

250

400

30

480

142

200

208

250

400

30

600

114

150

208

250

400

10

220

102

150

208

83

125

10

480

47

60

208

83

125

10

600

38

50

208

83

125

15

220

154

200

208

125

200

15

480

70

90

208

125

200

15

600

56

80

208

125

200

20

220

205

300

208

167

225

20

480

94

125

208

167

225

20

600

75

100

208

167

225

30

220

307

400

208

250

400

30

480

141

200

208

250

400

30

600

113

150

208

250

400

30

208

315

400

208

250

400

20

208

210

300

208

167

225

15

208

158

200

208

125

200

10

208

105

150

208

83

125

65

Specifications and Technical Data

Table 31
System
Size

Multi-module bypass cabinet electrical data (continued)

Type

J00, KR0

3+1

LR1

MR1

UR0, Y00

kVA

System
I/P Voltage
(VAC)

System
Max Input
Current

System
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output OCP
CB Size (A)

30

208

104

125

208

250

400

20

208

70

90

208

167

225

15

208

53

70

208

125

200

10

208

35

45

208

83

125

10

208

110

150

208

83

125

10

220

104

150

208

83

125

10

480

47

60

208

83

125

10

600

38

50

208

83

125

15

208

164

225

208

125

200

15

220

155

200

208

125

200

15

480

71

90

208

125

200

15

600

57

80

208

125

200

20

208

219

300

208

167

225

20

220

207

300

208

167

225

20

480

95

125

208

167

225

20

600

76

100

208

167

225

30

208

329

500

208

250

400

30

220

311

400

208

250

400

30

480

142

200

208

250

400

30

600

114

150

208

250

400

10

220

102

150

208

83

125

10

480

47

60

208

83

125

10

600

38

50

208

83

125

15

220

154

200

208

125

200

15

480

70

90

208

125

200

15

600

56

80

208

125

200

20

220

205

300

208

167

225

20

480

94

125

208

167

225

20

600

75

100

208

167

225

30

220

307

400

208

250

400

30

480

141

200

208

250

400

30

600

113

150

208

250

400

30

208

315

400

208

250

400

20

208

210

300

208

167

225

15

208

158

200

208

125

200

10

208

105

150

208

83

125

66

Specifications and Technical Data

Table 31
System
Size

Multi-module bypass cabinet electrical data (continued)

Type

J00, KR0

4+0

LR1

MR1

UR0, Y00

kVA

System
I/P Voltage
(VAC)

System
Max Input
Current

System
Input OCP
CB Size (A)

O/P Voltage
(VAC)

Nominal O/P
Current Rating (A)

Output OCP
CB Size (A)

30

208

104

125

208

333

500

20

208

70

90

208

222

300

15

208

53

70

208

167

225

10

208

35

45

208

111

150

10

208

146

175

208

111

150

10

220

138

175

208

111

150

10

480

63

80

208

111

150

10

600

51

70

208

111

150

15

208

219

300

208

167

225

15

220

207

250

208

167

225

15

480

95

125

208

167

225

15

600

76

100

208

167

225

20

208

292

400

208

222

300

20

220

276

400

208

222

300

20

480

127

175

208

222

300

20

600

101

125

208

222

300

30

208

438

600

208

333

500

30

220

414

500

208

333

500

30

480

190

250

208

333

500

30

600

152

200

208

333

500

10

220

137

175

208

111

150

10

480

63

80

208

111

150

10

600

50

60

208

111

150

15

220

205

250

208

167

225

15

480

94

125

208

167

225

15

600

75

90

208

167

225

20

220

273

400

208

222

300

20

480

125

150

208

222

300

20

600

100

125

208

222

300

30

220

410

500

208

333

500

30

480

188

225

208

333

500

30

600

150

200

208

333

500

30

208

421

500

208

333

500

20

208

280

400

208

222

300

15

208

210

250

208

167

225

10

208

140

175

208

111

150

67

Specifications and Technical Data

Table 32

Maintenance bypass cabinet lug sizes

Input
Maximum Recommended Lug
Unit
Rating

Nominal System
Input Voltage

Bolt Size

Lug T&B
One Hole 54000

Lug T&B
One Hole REDDY

30

600

6M (1/4”)

54105

62204

30

480

6M (1/4”)

54106

62204

30

240

6M (1/4”)

54152

62205

30

220

6M (1/4”)

54152

62205

30

208

6M (1/4”)

54152

62205

20

600

6M (1/4”)

NA

62204

20

480

6M (1/4”)

54130

62204

20

240

6M (1/4”)

54107

62204

20

220

6M (1/4”)

54107

62204

20

208

6M (1/4”)

54107

62204

15

600

6M (1/4”)

NA

62204

15

480

6M (1/4”)

NA

62204

15

240

6M (1/4”)

54106

62204

15

220

6M (1/4”)

54106

62204

15

208

6M (1/4”)

54106

62204

10

600

6M (1/4”)

NA

62204

10

480

6M (1/4”)

NA

62204

10

240

6M (1/4”)

54130

62204

10

220

6M (1/4”)

54130

62204

10

208

6M (1/4”)

54130

62204

68

Specifications and Technical Data

Table 32

Maintenance bypass cabinet lug sizes (continued)

Output
Maximum Recommended Lug
Unit
Rating

Nominal System
Output Voltage

Bolt Size

Lug T&B
One Hole 54000

Lug T&B
One Hole REDDY

30

600

6M (1/4”)

54130

62204

30

480

6M (1/4”)

54106

62204

30

240

6M (1/4”)

54108

62205

30

220

6M (1/4”)

54108

62205

30

208

6M (1/4”)

54108

62205

20

600

6M (1/4”)

NA

62204

20

480

6M (1/4”)

54130

62204

20

240

6M (1/4”)

54106

62204

20

220

6M (1/4”)

54106

62204

20

208

6M (1/4”)

54106

62204

15

600

6M (1/4”)

NA

62204

15

480

6M (1/4”)

NA

62204

15

240

6M (1/4”)

54106

62204

15

220

6M (1/4”)

54106

62204

15

208

6M (1/4”)

54106

62204

10

600

6M (1/4”)

NA

62204

10

480

6M (1/4”)

NA

62204

10

240

6M (1/4”)

54130

62204

10

220

6M (1/4”)

54130

62204

10

208

6M (1/4”)

54130

62204

Table 33

Battery cabinet physical characteristics

Battery Cabinet
Type

Dimensions
WxDxH in. (mm)

Net Weight Without
Batteries, lb. (kg)

Short Narrow

27.2x31.4x63
(690x825x1600)

551
(250)

Short Wide

58.5x31.4x63
(1488x825x1600)

889
(400)

Table 34
UPS
Rating

Maintenance Bypass Cabinet weights
Maintenance Bypass Cabinet Style, lb. (kg)
A

B

C

D

E

F

J

K

L

M

N

P

10kVA

408
(185)

545
(247)

675
(306)

602
(273)

732
(332)

630
(286)

403
(183)

540
(245)

670
(304)

597
(271)

728
(330)

630
(286)

15kVA

408
(185)

567
(257)

728
(330)

659
(299)

822
(373)

680
(308)

403
(183)

562
(255)

723
(328)

655
(297)

818
(371)

680
(308)

20kVA

408
(185)

646
(293)

842
(382)

739
(335)

935
(424)

750
(340)

403
(183)

642
(291)

838
(380)

734
(333)

930
(422)

750
(340)

30kVA

408
(185)

694
(315)

893
(405)

807
(366)

1027
(466)

840
(381)

403
(183)

690
(313)

888
(403)

802
(364)

1023
(464)

840
(381)

69

Specifications and Technical Data

Table 35

Maintenance bypass cabinet dimensions
Unit

Width

Depth

inch

27.2

31.4

63

mm

690

825

1600

Table 36

Height

Multi-module paralleling cabinet dimensions

1+1 Cabinet Type

Width

Depth

Height

1+N Narrow

27.2

31.4

63

Types A00, BR0, CR1, DR1

690

825

1600

Width

Depth

Height

1+N Narrow

27.2

31.4

63

Types A00, E00, J00

690

825

1600

1+N Cabinet Type

8.2

1+N Wide

58.5

31.4

63

All other types

1488x

825x

1600

Cable Lengths: Floor to Connection Point Inside UPS
To help calculate the total cable length required, refer to Table 37 for the distance from the floor to
selected connection points inside the NX. Determine the cable length required to reach the NX, then
add the appropriate length from the table and adequate slack for repair and maintenance.
Table 37

Distance to connection points on the NX UPS
Distance

Connection Point on UPS
Bypass AC input supply

From
Floor
in. (mm)

From
Top of Unit
in. (mm)

30 (750)

30 (750)

UPS output AC

30 (750)

30 (750)

Neutral busbars—Input and Output

11 (280)

55 (1397

Battery power

16 (400)

58 (1474)

Auxiliary cables: Monitor board (U2)

60 (1500)

20 (508)

Communications

55 (1400)

25 (635)

8 (197)

56 (14227)

70(1780)

20(508)

Ground
Parallel Board

70

Specifications and Technical Data

NOTES

71

Specifications and Technical Data

72

Ensuring The High Availability
0f Mission-Critical Data And Applications.

Emerson Network Power, the global leader in enabling business-critical
continuity, ensures network resiliency and adaptability through
a family of technologies—including Liebert power and cooling
technologies—that protect and support business-critical systems.
Liebert solutions employ an adaptive architecture that responds
to changes in criticality, density and capacity. Enterprises benefit
from greater IT system availability, operational flexibility and
reduced capital equipment and operating costs.

Technical Support / Service
Web Site
www.liebert.com
Monitoring
800-222-5877
monitoring@emersonnetworkpower.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@emersonnetworkpower.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@emersonnetworkpower.com
Environmental Systems
800-543-2778
Outside the United States
614-888-0246

Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Europe
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
+39 049 9719 111
Fax: +39 049 5841 257
Asia
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
852 2572220
Fax: 852 28029250

While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2006 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert and the Liebert logo are registered trademarks of Liebert
Corporation. All names referred to are trademarks
or registered trademarks of their respective owners.

SL-25215_REV6_11-06

Emerson Network Power.
The global leader in enabling Business-Critical Continuity™.
Outside Plant
AC Power
Embedded Computing
Embedded Power
Power Switching & Controls
Connectivity
DC Power

Monitoring

Precision Cooling

EmersonNetworkPower.com
Racks & Integrated Cabinets
Services
Surge Protection

Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co.
©2006 Emerson Electric Co.



---

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