Installation
Avtron Model LPH 400 • Resistive Load Bank
Part Number LPH400D43233
3-3
4. Load Banks mounted into a channel, trough, hollow, well, or pit, or exhausting into a full
wall or corner, require special considerations even if above conditions are met. In these
cases, provide a detailed sketch of site layout for Avtron to inspect and comment.
POWER REQUIREMENTS
The Load Bank requires a 115V, single phase, 60 Hz, 15 amp source of power for operation of
the control circuit which is provided by an integral 240/480 to 115V control transformer.
This enables the operator to use the generator output for control power. When the operator
applies either 240V or 480V to the primary, the control transformer supplies 120 VAC for
control power. An external power source must be provided (as described in section B of Fan
Motor Connections) if internal power for motor and control power is not desired.
During startup, be sure the load switch on the generator under test is not "ON" until the prime
mover has the generator up to speed. Also, be sure the load switch is OFF before generator
shutdown procedures are started.
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C A U T I O N
The Load Bank includes a control transformer. Never connect a
control power line cord to TB1(1) and TB1 (2). This would
permanently damage the control transformer.
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FAN MOTOR CONNECTIONS
The fan circuit consists of fuses, motor starters, contactors, overload relays, and the fan motor.
A. INTERNAL BLOWER POWER OPERATION: The fan is connected to load bus
through relay K28 and fuses F7, 8, and 9. When operating the fan motor from the
generator source, an additional load of 2400 watts will be applied. This additional load
will be reflected in the meter readings and should be noted on load readings to prevent
errors.
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