Emerson K711H Brochures and Data Sheets

Avtron K711H

Resistive “Roof Top” Style Load Bank - 5 to 500 KW

Testing Your Emergency Standby
Generator with a Load Bank Means
Reliability When it Matters Most.

Key Features

• Designed for Sound Attenuated
Enclosures

• Economical - Uses Engine Air
for Cooling

• Reduces “Wet-Stacking” Problems

• Provides Load for Routine
Generator Testing

• Corrosion Resistant Aluminized
Steel Frame

• Includes Exhaust Screening for
Continuous Outdoor Operation

Superior Avtron quality combined with
simple operation and maintenance will
provide years of trouble free service.

The Avtron Model K711H Load Banks are intended for use
as a supplemental load for lightly loaded engine gen sets.

The Avtron K711H “Roof Top” Style Load Banks are designed for mounting on sound attenuated
enclosures and are available in a variety of frame dimensions. The load banks are permanently
mounted and sized to match the exhaust opening. The K711H 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 typically ranges between 5 and 500 KW. Most engine
manufacturers recommend sizing the radiator load bank to 40-60% of engine nameplate rating
to eliminate “wet-stacking” problems.

The load bank is controlled from individual load-step toggle switches. The control panel is provided
as a remote wall mount style which is required for “roof top” applications.

The K711H “roof top” style load bank 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.

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
[phone] or [e-mail].

Quality System Certified to ISO 9001

K711H 300 KW Resistive
“Roof Top” Style Avtron
Load Bank.

Avtron K711H

Resistive Load Bank - 5 to 500 KW

Specications subject to change without notice.

Construction

Formed aluminized steel frame provides a
rigid enclosure to match the height and width
of the engine radiator or duct. Lifting eyes are
included to simplify installation. The standard
depth is 13" [330.2]. For applications where
the amount of load element KW required
exceeds the available 13" depth, then a
“double-deep” K711A can be used instead,
with a 26" [660.4] depth. Designed for out­door operation.

Control Power

The Load Bank 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 Load Bank 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 remote control panel contains a POWER
ON-OFF switch, a MASTER LOAD ON-OFF
switch, and individual load step toggle
switches for application of individual load
sections. A MANUAL/AUTO switch is also
provided (if the optional automatic load
step controller is included). A remote rack­mounted 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 re­sistance element operating life, and eliminates
the need for a cool down period after load
bank operation.

Options

• Control Power Transformer

• Automatic Load Step Controller

• ADMS™ Digital Metering System, Remote
Mounted

• Remote Control Panel with Enclosure

• Remote I/O for Interface to Switch Gear

NOTE Designs for international 50/60 Hz voltages are also
available. Consult factory.

CONDUIT ENTRY OPPOSITE END

TO BE DRILLED BY CUSTOMER

LOAD BANK (REF)

GEN SET (REF)

FRONT of
generator
enclosure

load bank

W + 20.0 [508.00]

AIRFLOW

CONDUIT ENTRY TO BE DRILLED BY CUSTOMER

TOP VIEW

of generator enclosure

LOAD BANK (REF)

SIDE VIEW

of generator enclosure

All dimensions are in inches [millimeters].

W

GEN SET (REF)

H

Depth

H + 4.00

[101.60]

Emerson Network Power

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

216-573-7600 • FAX: [phone] • [e-mail]

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.

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

©2015 Emerson Network Power Bulletin 600• Rev. B