Emerson 5 1250Kw K711 K711A K711L Load Bank Brochures And Data Sheets

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Avtron K711/K711A/K711L

Resistive Load Bank - 5 to 1250 KW

Testing Your Emergency Standby

Generator with a Load Bank Means

Reliability When it Matters Most.

• Economical - Uses Engine Air

for Cooling

• Reduces “Wet-Stacking” Problems

• Provides Load for Routine

Generator Testing

• Corrosion Resistant Aluminized

Steel Frame

• Includes Lifting Eyes and Duct

Flange for Easy Installation

Key Features

Superior Avtron quality combined with

simple operation and maintenance will

provide years of trouble free service.

Avtron’s extensive line of Load Bank and

Industrial Resis tor Products are solid

performers used throughout the world.

For total technical support or additional

information, please contact Avtron at

(216) 573-7600 or LBsales@Emerson.com.

Quality System Certified to ISO 9001

The Avtron Model K711 Load Bank are intended for use as

a supplemental load for lightly loaded engine gen sets.

The Avtron K711/K711A/K711L load banks are designed for duct or radiator mounting and

are available in a variety of frame dimensions. The load banks are permanently mounted to

the front of the engine generator and sized to match the radiator or exhaust duct opening.

The K711 load banks utilize the engine cooling air rather than an internal cooling fan found

on conventional load banks.

The primary cause of premature diesel engine failure is “wet-stack ing” which is literally

“wet” unburned fuel accumulating in the engine exhaust (“stack”), due to under-loading of

the generator. Diesel engines that are lightly loaded or allowed to idle for long periods never

reach their recommended full operating temperature. Over time, this unburned fuel coats

the combustion chamber and pistons with a thick coating of tar and carbon build-up, reducing

efficiency and life span of the engine considerably. A supplemental radiator load bank helps to

“burn-off” these harmful carbon deposits, greatly increasing engine life.

These units are offered in 208, 240, 480 or 600 volt versions (at 60 Hz) or 380, 400 or 416

volt versions (at 50 Hz). Load rating varies and ranges between 5 and 1250 KW. Most engine

manufacturers recommend sizing the radiator load bank to 40-60% of engine nameplate

rating to eliminate “wet-stacking” problems.

The K711 load bank is controlled from a built-in control panel which contains the individual

load-step toggle switches. The control panel is also available sized for standard 19" [482.6]

rack mounting when remote installation of the panel is desired.

The K711 family is intended for use as a supplemental load for lightly loaded engine generator sets.

The load bank utilizes the engine cooling air to cool the resistive load elements.

K711 500 KW Resistive

Radiator Mount Avtron

Load Bank.

EmersonNetworkPower.com/loadbank

Emerson. Consider it Solved and Emerson Network Power are trademarks of Emerson Electric Co.

or one of its afliated companies. All the other marks are the property of their respective owners.

Emerson Network Power

Avtron • 6255 Halle Drive, Cleveland, Ohio 44125, U.S.A.

216-573-7600 • FAX: 216-573-5953 • LBsales@Emerson.com

Avtron K711

Resistive Load Bank - 5 to 1250 KW

ADMS™ and Helidyne™ are trademarks of Avtron. Specications subject to change without notice.

©2015 Emerson Network Power Bulletin 263A• Rev. J

Specications subject to change without notice.

30°

CONTROL

PANEL

K711A K711

POWER DISTRIBUTION BLOCK

SUPPORT BRACKET

DIRECTION OF

ELEMENTS

H=

(RADIATOR

CORE

HEIGHT)

W=

(RADIATOR

CORE

WIDTH)

BOLT-ON

DUCT

ADAPTER

*

OUTDOOR

LOUVER

(OPTIONAL)

CONTROL POWER

CONNECTIONS

SEE DETAIL "B" (above)

ABC

BUS BAR

CONNECTIONS

SEE DETAIL "A"

(above)

CONTROL PANEL

(ALTERNATE

LOCATION)

CONTROL PANEL

(STANDARD

LOCATION)

POWER

DISTRIBUTION

BLOCK

W_ _ _

W + 20.00

[508.00]

2.00

REF

[50.80]

5.50

[139.70]

13.00

[330.20]

2.00 [50.80]

H_ _ _

H + 4.00

[101.60]

26.00

[660.40]

0.500 DIA

[12.70]

4 HOLES

DETAIL "A" DETAIL "B"

LIFTING HOLES

1.00 DIA [25.40]

TYP 4 PLACES

4.00 [101.60]

3.75

[95.25]

1.75

[44.45]

1.00

[25.40]

1.00

[25.40]

RECOMMENDED

CONDUIT

ENTRY AREA

AIRFLOW

OUTDOOR LOUVER REF

DUCT ADAPTER

FLANGE REF

W_ _ _ REF 2.00 TYP

[50.80]

*

NOTE:

IF DUCT ADAPTER IS USED, MOUNT USING LEFT & RIGHT FLANGES ONLY.

OTHERWISE USE TOP AND BOTTOM FLANGES OF THE LOAD BANK.

K711L

H + 4.00

[101.60]

LOAD CONNECTION

BUS BARS

SEE DETAIL "A"- K711L

B

C

A

1.75

[44.45]

2.00

[50.80]

7.50

[190.50]

0.62 [15.75]

LOAD CONNECTION BUS BAR

(SCALE 2:1)

0.563 DIA

[14.30]

8 HOLES

W_ _ _

H_ _ _

6.00

[152.40]

5.00

[127.00]

W + 24.00

[609.60]

13.00

[330.20]

C

RADIATOR

(CUSTOMER SUPPLIED)

42.00

[1066.80]

4.00

[101.60]

12.13 [308.10]

AIRFLOW

5.50 [139.70]

H =

(RADIATOR

CORE

HEIGHT)

W =

(RADIATOR

CORE

WIDTH)

DETAIL "A"- K711L

2.00 REF

[50.80]

Options

• Control Power Transformer

• Outdoor Construction with Bolt-on Louver

Assembly

• Automatic Load Step Controller

• ADMS™ Digital Metering System, Remote

Mounted

• Remote Control Panel with Enclosure

• Remote I/O for Interface with Switch Gear

NOTE Designs for international 50/60 Hz voltages are also

available. Consult factory.

Construction

Formed aluminized steel frame provides a rigid

enclosure to match the height and width of

the engine radiator or duct. Lifting eyes and a

radiator duct flange are included to simplify

installation. The standard K711 depth is 13"

[330.2]. For applications where the amount of

load element KW required exceeds the avail-

able 13" depth, then a “double-deep” K711A

can be used instead, with a 26" [660.4] depth.

Designed for NEMA-1 indoor installation,

the K711/K711A is also available in NEMA-

3R outdoor construction as an option. The

K711L frame can be used for special mount-

ing of 1250 KW load banks to high capacity

2000/2500 KW generator sets.

Control Power

The K711/K711A/K711L requires exter nal

control power of 120 VAC, single phase,

50/60 Hz. A control power transformer is

available as an option for sites where 120

VAC is not readily available.

Cooling

The K711/K711A/K711L does not have its

own cooling system. Instead, it relies on

cooling air from the engine driven radiator

fan or separately powered duct blowers. A

built-in thermal switch drops all load if an

overtemperature condition is detected.

Controls

The local control panel contains a POWER ON

-OFF switch, a MASTER LOAD ON-OFF switch,

and individual load step toggle switches for ap-

plication of individual load sections. A MANUAL/

AUTO switch is also provided (if the optional

automatic load step controller is included). A

remote rack-mounted control panel with wall-

mounted enclosure is available as an option.

Resistor Elements

The fully supported Avtron Helidyne™ resistive

load elements are made of corrosion resistant

chromium alloy wire and are engineered to

operate at conservative temperature ratings.

This provides more stable loading, extends re-

sistance element operating life, and eliminates

the need for a cool down period after load bank

operation.

All dimensions are in inches [millimeters].