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
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.
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 Resis­tor 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
K922A 5000 KW Resistive
Medium Voltage Avtron
Load Bank.
Avtron K922A
Resistive Medium Voltage Permanent Load Bank - 3000 to 7000 KW
Specifications 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.
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.
Load Capacity Ratings
Total Load
Voltage
Load Step
Resolution
3000-7000
KW
per Module
5-15 KV
class
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]
Resistor Elements
Options
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.
•PLC Control
•ADMS™ Digital Metering (V, A, KW, Hz) with
Communicator EXT™ Data Logging Software
•-40° F Arctic Design
Control Power
The K922A requires control power of 120
VAC, single phase, 60 Hz power (control
transformer optional).
EXHAUST
HOODS
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.
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.
160.75
[4083.00] MAX.
WITHOUT
EXTENSION
LEGS
B14801
VTRON MANUFACTURING, INC.
CLEVELAND, OHIO
RESISTIVE LOAD BANK
MODEL/
SYSTEM
END ACCESS
PANELS*
*NOTE:
ALL PANELS
HAVE HINGED
ACCESS WITH 1/4 TURN
LATCHES & 3 HEAVY
DUTY HINGES
PER DOOR
SN
OPTIONS
190.75
[4845.00]
MAX
FAN CONDUIT AND
P TUBING CARRIER
LOW VOLTAGE CONTROL
ENCLOSURE
SCREENED INTAKE AIR
(8 PLACES)
280.50 [7112.00]
CENTER TO CENTER OF MOUNTING
294.00 [7468.00]
REFERENCE CONCRETE PAD,
PEDESTAL, OR STRUCTURE
Emerson Network Power
Avtron • 6255 Halle Drive, Cleveland, Ohio 44125, U.S.A.
216-573-7600 • FAX: 216-573-5953 • LBsales@Emerson.com
EmersonNetworkPower.com/loadbank
RESISTOR ASSEMBLY
ACCESS PANELS*
PANEL FOR VOLTAGE
CONFIGURATION*
Cooling
Manual Controls
STAINLESS STEEL EXHAUST SCREEN
TYPICAL 8 PLACES
LEG EXTENSIONS
WITH STRUTS SHOWN
(shipped loose)
88.50 [2248.00]
CENTER TO CENTER
OF MOUNTING
102.00 [2591.00]
FANS NOT SHOWN ON THIS VIEW
All dimensions are in inches [millimeters].
Emerson. Consider it Solved and Emerson Network Power are trademarks of Emerson Electric Co.
or one of its affiliated 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. Specifications subject to change
without notice.
©2015 Emerson Network Power Bulletin 422• Rev. D