Power Checks; Bupass Failure Test; Mains Failure Checks - Powertronix Quasar Service Manual

Service Manual
3.5 -

Power Checks

Once the initial start up and commissioning have been completed the UPS should be functionally checked and
before connecting to the critical load.
The following procedure describes the recommended functional checks:
3.5.1 - Bypass failure test.

3.5.2 - Mains failure checks.

3.5.3 - Load Transfer Test
3.5.4 - Maintenance bypass check.
3.5.5 - Internal EPO check.
3.5.6 - External EPO (if required).
3.5.1

Bupass Failure Test

The purpose of this test is to ensure that the UPS correctly recognises a Bypass failure (simulated by opening the
Reserve MCB) and that the Inverter remains stable.
1. Open the `RESERVE INPUT' MCB. ( I2 ).
2. On the LCD ensure that the following alarms are displayed:
D UPS ALARM (heading)
D MAINS WITHIN LIMITS.
D BATTERY VOLTAGE WITHIN LIMITS.
D INVERTER OPERATING.
D LOAD ON INVERTER.
D BYPASS LINE OUT OF LIMITS.
D The green `NORMAL' LED ( 1 ) will extinguish.
D The red `ALARM' LED ( 2 ) will illuminate.
D The green `LOAD on INV' LED ( 3 ) remains illuminated.
D The alarm buzzer should sound, press `CLEAR' (d) push button to silence the alarm.
3. Using a DVM check that the output Voltage and frequency at output terminals is correct (e.g. 400Vac and
50Hz).
4. Close the `RESERVE INPUT' MCB. ( I2 )
5. The UPS should now return to normal Operation.
Ensure that:
D The ` UPS in Operation ` returns to the LCD.
D The green `NORMAL' LED ( 1 ) has illuminated,
D The red `ALARM' LED ( 2 ) has extinguished,
D The yellow `BYPASS ON' LED ( 4 ) has extinguished
D The green `LOAD-on-INV' LED ( 3 ) has illuminated.
3.5.2 Mains Failure Checks
The purpose of this test is to ensure that the UPS correctly recognises a Mains Failure (Simulated by opening the
MAINS INPUT MCB) and is able to operate from the internal Battery.
1. Open the `MAINS INPUT' MCB. ( I1 )
2. On the LCD ensure that the following alarm are displayed:
D UPS ALARM (heading)
D MAINS OUT OF LIMITS.
D BYPASS LINE WITHIN LIMITS.
D INVERTER OPERATING.
D INVERTER-BYPASS LINE SYNCHRONIZED.
D LOAD ON INVERTER.
D The green `NORMAL' LED ( 1 ) has extinguished.
D The red `ALARM' LED ( 2 ) has illuminated.
D The green `LOAD on INV' LED ( 3 ) remains illuminated.
D The Alarm buzzer should sound, press `CLEAR' (d) push button to silence the alarm.
3x3 UPS Commissioning
Issue 2 - November 2001
Chapter 3 - Commissioning
Validating the Installation
3 - 7