Installation
Avtron Model LPH400 • Resistive Load Bank
Part Number LPH400D30693-1
3-4
B.
REMOTE FAN POWER OPERATION: When testing single phase system or systems or
a frequency other than 60 Hz, the fan motor must be run from a separate source. First
review schematic, set control panel selector switch to match external voltage applied, and
then connect external power. To do this, locate TB2 internally on the side of the
customer load connection compartment at the intake end of the Load Bank. Connect the
external fan power source to terminals 1 through 3 of TB2.
C.
NON-STANDARD FAN MOTOR FREQUENCY: Fan motor will operate between 208
and 250 volts and between 416 and 500 volts at 3-phase, 60 Hz.
Connection at 50 Hz is the same as 60 Hz, with motor voltage range of 180 to 220 volts and 360
to 440 volts.
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W A R N I N G
When operating at 50 Hz, the motor speed (RPM) is reduced,
which also reduces cooling of the Load Bank. Do not exceed
400 volts in the 480 mode or 200 volts in the 240 mode, to input
bus when running the fan at 50 Hz.
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C A U T I O N
Do not attempt to operate fan motor at 400 Hz. When loading unit
with power other than 50/60 Hz, the fan motor must be wired to
external power source supplying any of the above proper voltages
and frequencies.
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NOTE
When Option 1 is provided, follow correct jumper configuration on
TB2 as shown on the schematic before applying load or external
fan power.
