Owner manual

Gamatronic Electronic Industries Ltd.

POWER

50 KVA, N.Am. Std. – User Guide, Release 1.9

5.15 Testing

Perform the following tests on the Power+ unit.

5.15.1 Blackout Test

This test is designed to verify the operation of Power+ in the event of a blackout, when no ac

power is supplied to the UPS.

1. Turn all ac input to the system Off (turn Off ac input switches to both Bypass and

Rectifier).

2. Measure the phase-to-neutral voltage for each output phase. The measurements should

all be 120 V (or as specified).

5.15.2 Cold Start

This test is designed to verify the operation of the UPS after all input power (both mains and

battery) has been shut off and the UPS is powered up with battery only and no ac input.

1. Turn all ac and dc input to the system Off, so that there are no voltages at any of the

inputs to the UPS.

2. Turn On the switch to the DC input (from the batteries) only.

3. Wait approximately 2 minutes for Power+ to initialize (see Section 5.11, First-time

Startup).

4. Measure the phase-to-neutral voltage for each output phase. The measurements should

all be 120 V (or as specified).

Turn On the ac inputs to the system.

5.15.3 Test under Load

This test is designed to verify the operation of Power+ under load.

1. Connect the load.

2. Measure the ac input voltage during operation under load. Take the measurements at

the output terminals of Power+ (phase-to-phase between L1-L2, L2-L3, and L3-L1 and

phase-to-neutral at L1, L2, and L3). Phase-to-phase and phase-to neutral voltage

should be not less that 2% below no-load values.

3. Check and record the total system load (output current) and make sure that Power+ is

not overloaded with respect to system specifications.

4. Ascertain correct and orderly operation. Verify that Power+ is operating normally and

that no alarms or fault indications are present.