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Emerson Network Power
Avtron • 6255 Halle Drive, Cleveland, Ohio 44125, U.S.A.
216-573-7600 • FAX: [phone] • [e-mail]
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].