Emerson Avtron K922A Brochures and Data Sheets

Avtron K922A

Resistive Medium Voltage Load Bank - 3000 to 7000 KW

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

Key Features

• High Capacity per Module

• No Step-Down Transformer
Required

• Direct Connection to Medium
Voltage Source

• Reduced Installation Costs

• Outdoor Construction

• Vertical Air Discharge

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.

The Avtron Model K922A is a ultra high capacity resistive
load bank used for testing medium voltage power sources.

The Avtron K922A resistive load bank is ideal for testing medium voltage generators or turbines.
Avtron is leading the industry by offering a true medium voltage load bank while others still supply
a conventional step-down transformer and a low voltage load bank (typically 480 VAC). A medium
voltage load bank eliminates the need for a costly step-down transformer, which reduces the over­all package size and installation cost.

The load bank is designed for permanent outdoor installation with vertical hot air discharge. Each
load bank module is typically rated between 3 and 7 MW. Multiple modules are used when tens
or hundreds of megawatts are required. Voltages from 5 KV to 15 KV class are available.

The K922A load bank incorporates 4, 6, or 8 independent resistive stacks. Each resistive stack
contains its own integral cooling fan. A medium voltage compartment houses the main input
load bus connections as well as the medium voltage vacuum load step contactors. The operator
controls are housed in a separate remote enclosure.

The K922A is ideal for high power resistive loading of medium voltage generating systems in
factory production lines or test cells. It is designed for permanent outdoor mounting.

For total technical support or additional
information, please contact Avtron at
[phone] or [e-mail].

Quality System Certified to ISO 9001

K922A 5000 KW Resistive
Medium Voltage Avtron
Load Bank.

Avtron K922A

Resistive Medium Voltage Permanent Load Bank - 3000 to 7000 KW

Specications subject to change without notice.

Construction

The load bank is fabricated from heavy gauge
formed steel and welded structural steel,
making a rigid, drip-proof structure suitable
for permanent outdoor mounting. Cooling
air for the resistive load elements is drawn in
from the bottom and exhausted out the top.
Weather-resistant exhaust hoods and welded
intake screens provide maximum protection
to the resistor cases and blower assemblies.
Structural extension legs are provided for
mounting the load bank at the proper field
elevation.

Resistor Elements

Avtron Helidyne™ load elements are helically
wound from nickel chromium resistance alloy
and are specially insulated for medium volt­age. The elements are fully supported across
their entire length with ceramic insulators on
stainless steel support rods.

Control Power

The K922A requires control power of 120
VAC, single phase, 60 Hz power (control
transformer optional).

Cooling

The resistive load elements are air cooled by
multiple integrally mounted blower motors.
The blower motors are controlled by motor
starter relays located within the load bank
and feature a time delay starting sequence
to reduce in-rush current. An external power
source rated 460 VAC, 3 phase, 60 Hz is re­quired to power the blowers. Motors rated
575 VAC, 60 Hz, 415 VAC, 50 Hz, or 380 VAC,
50 Hz are available as options.

Manual Controls

A rack-mounted control panel is provided for
remote mounting. Controls include POWER
ON-OFF switch, a POWER ON light, BLOWER
ON-OFF push buttons with a BLOWER FAILURE
light, OVERTEMPERATURE light, MASTER
LOAD ON-OFF switch, and individual load step
ON-OFF toggle switches which actuate the
medium voltage vacuum contactors located
within the load bank. PLC or computer based
controls are also available as an option.

Emerson Network Power

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

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

EmersonNetworkPower.com/loadbank

Protection

Differential air pressure switches are pro­vided for each blower. Overtemperature
protection is provided via a thermal switch
for each resistor stack. Should an air-loss or
overtemperature condition occur, all load
is automatically removed. Fuses and motor
overload relays also protect the blowers.

EXHAUST
HOODS

PANEL FOR VOLTAGE
CONFIGURATION

LOW VOLTAGE CONTROL

FAN CONDUIT AND
P TUBING CARRIER

REFERENCE CONCRETE PAD,
PEDESTAL, OR STRUCTURE

ENCLOSURE

280.50 [7112.00]

CENTER TO CENTER OF MOUNTING

294.00 [7468.00]

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.

Communicator EXT™ is a trademark of Electro Industries/GaugeTech. ADMS™ and Helidyne™ are trade­marks of Avtron. SIGMA™ is a trademark of NJ Froment & Co. Ltd. Specications subject to change
without notice.

©2015 Emerson Network Power Bulletin 422• Rev. D

RESISTOR ASSEMBLY

ACCESS PANELS

*

B14801

MANUFACTURING, INC.

VTRON

CLEVELAND, OHIO

MODEL/

RESISTIVE LOAD BANK

SN

SYSTEM

OPTIONS

*

SCREENED INTAKE AIR

(8 PLACES)

Load Capacity Ratings

Total Load Voltage

3000-7000

KW

per Module

5-15 KV

class

Load Step

Resolution

250, 500, or 1000

KW typical.

Bulk load also

available.

Load Bank Weight (approx.)

3000-5000 KW: 15,000 lbs. [6803.8 kg]
5500-7000 KW: 19,000 lbs. [8618.2 kg]

Options

• PLC Control

• ADMS™ Digital Metering (V, A, KW, Hz) with
Communicator EXT™ Data Logging Software

• -40° F Arctic Design

STAINLESS STEEL EXHAUST SCREEN

160.75

[4083.00] MAX.

WITHOUT

EXTENSION

END ACCESS

LEGS

NOTE:

*

ALL PANELS

HAVE HINGED

ACCESS WITH 1/4 TURN

LATCHES & 3 HEAVY

DUTY HINGES

PER DOOR

190.75

[4845.00]

MAX

LEG EXTENSIONS

WITH STRUTS SHOWN

(shipped loose)

All dimensions are in inches [millimeters].

PANELS

*

FANS NOT SHOWN ON THIS VIEW

TYPICAL 8 PLACES

88.50 [2248.00]

CENTER TO CENTER

OF MOUNTING

102.00 [2591.00]