Installation
Avtron Resistive Load Bank - Part Number LPV600 994210
3-3
POWER REQUIREMENTS
The Load Bank requires a 120V, single phase, 60 Hz, 20 amp source of power for operation of the
control circuit. An integral 480/120V control power transformer is provided for powering the control
circuit. No external 120V power is required.
FAN MOTOR CONNECTIONS
The fan circuit consists of fuses, motor starters, contactors, overload relays, and the fan motor.
Required power for the fan/blower motor is 240/480V, 3-phase, 60 Hz, 14.4/7.2 Amp per phase. The
fan/blower power connections are made to TB1(11-13). Reference Schematic/Interconnection
Diagram 995228.
LOAD CONNECTION
The Load Bank is designed to load power sources at 600 or 300 VDC. The load connections are
made to the bus bars for 600 VDC labeled POS (+) and 600V NEG (-) and for 300 VDC labeled
POS (+) and 300V NEG (-), located within the Load Bank. Refer to resistor case configuration
labels on the inside of each door located on each side of the Load Bank for configuration setup of
600 VDC or 300 VDC. The Load Bank is configured for 600 VDC. Also refer to Schematic Diagram
995228 for reference. For 600 VDC operation, 300 VDC negative resistor wire must be isolated
from bus bars and each other. Operator must isolate prior to 600 VDC operation. Also, the operator
must ensure that Voltmeter MT1 terminal (2) is connected to the Negative 600 VDC Bus Bar to get
correct voltage reading. Operator must move wire if needed before operation. For 300 VDC
operation, operator must connect 300 VDC negative resistor wires to bus bar. Removal of 600 VDC
negative resistor wires is NOT required. Also, operator must ensure that Voltmeter MT1 terminal
(2) is connected to the Negative 300 VDC Bus Bar to get correct voltage reading. Operator must
move wire if needed before operation.
Load connections are made to the bus bars labeled (+) and (–), located within the Load Bank.
(Access via the lower hinged panel on front of the unit.) Run cables through opening in floor (base)
of Load Bank frame up to bus bars. Verify proper phase to phase clearance on cable lugs, mounting
hardware, and wiring. Cables to the Load Bank should be sized to handle the maximum rated load
according to the National Electric Code.
There are two limit switches (LS1 and LS2), one located on each access door of resistor cases
located on the Load Bank. The switches are intended to prevent load from being applied if doors are
open. Operator must make sure doors are properly closed prior to operation.
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