OPERATION
TESTING 208VAC THREE PHASE
2-1
SETTING UP THE LOAD BANK - Place the load bank in an area free from fuel, oil, or any other
flammable substance. The load bank should be positioned so that any strong wind or air currents will
flow with the air flow of the loadbank.
2-2
APPLYING POWER - The load bank should be connected to the power unit to be tested with an
output of 208VAC 3 phase. Make sure that the power unit is off before connecting the cable to the load
bank. Use L1, L2, L3 and N, the blue and yellow plug, when testing 208VAC 3 phase circuits. Plug the
power cable plug in to the load bank. Turn on the output of the power unit.
2-3
CHECKING THE POWER - check the following:
A.
The amber light, “A”, “B”,”C” should be on.
B.
The voltmeter should read 120VAC on “A”, “B”, and “C” phase.
C.
The frequency meter should read approximately60HZ.
D.
The ammeter should read 0A.
2-4
APPLYING THE LOAD - If the above steps checked OK, turn on the main switch. The fans should
start up and the airflow should be as indicated by the airflow arrow. Add the load desired with the rate
switch.
A.
Step 1 is 1KW - 8.3A
B.
Step 2 is 2KW - 16.6A
C.
Step 3 is 2KW - 16.6A
D.
Step 4 is 5KW - 41.6A
E.
Step 5 is 10KW - 83.3A
F.
Step 6 is 10KW - 83.3A
Check to see that the voltage and frequency does not drop beyond acceptable limits under load. Return
the rate switch to the off position.
2-5
SHUTTING DOWN - After turning the rate off, allow the load bank to cool down before turning the
power unit off. Turn the power unit off and disconnect the power cable plug.
