Avtron LPH400 - Operating Instructions

Operation
Avtron Model LPH 400 • Resistive Load Bank
Part Number LPH400D43233
4-2
A load step may be turned on or off before or during a test, but will load the unit only
when the MASTER LOAD switch is ON.
OPERATING INSTRUCTIONS
1. Connect the unit to be tested as described in Section III, INSTALLATION, under Power
Requirements. Use all three load bus bars in the customer connection access box for
3-phase generators, or connect the power cables to the Phase A and Phase C bus bars for
single phase generators. (See Section III, INSTALLATION, for details.)
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C A U T I O N
The cooling fan motor is rated at 208-240/480 volts, 3-phase,
60 Hz, with corresponding overload heaters for protection. The
motor must be connected to a separate power source if:
1. Using the unit to test a single phase unit.
2. Operating at any frequencies other than 50/60 Hz.
3. Operating at any voltage other than 240/480 volts ±10 @
60 Hz.
(Refer to Non-Standard Blower Motor Frequency in Section III.)
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2. Place all switches on the control panel in the OFF position.
3. Place the BLOWER VOLTAGE SELECT switch to the correct voltage and source
selection.
4. Place the LOAD VOLTAGE SELECT switch to the correct voltage to test the generator.
5. Start the generator to be tested. After unit stabilizes at operating speed, temperature,
voltage, and any other required condition for testing per manufacturer’s instructions,
proceed to step 7.
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