GE Industrial Solutions Galaxy Verification - Manual (Page 56)

Galaxy Power System Verification Procedures
3 - 12 Galaxy Millennium Controller Performance Verification Procedures Issue 3 January 2008
Battery on
Discharge
Alarm Test
If the BD alarm was observed during the High Voltage Shutdown test
this test can be disregarded.
If the BD alarm was not observed during the High Voltage Shutdown
test, do the following:
Step Action
1 From the front panel follow the path <MENU> → CONFIG
→ THRLD and observe the setting of the BD (FLOAT)
threshold.
2 Switch some of the rectifiers to STANDBY or OFF, until the
remaining rectifiers go into a current limit and plant voltage
drops below BD (FLOAT) threshold. Observe the active BD
and MAJ LEDs and asserted PMJ and BD relays.
3 Restart the rectifiers to retire alarms and return the plant
voltage to float.
Rectifier
Fail Alarm
Test
If the RFA alarm was observed during the High Voltage Shutdown Test
no separate test is required.
If the High Voltage Shutdown Test is not performed, generate an RFA
(Rectifier Fail Alarm) in each of the plant rectifiers individually, using
the following procedure:
Step Action
1 Turn the rectifier Off. Wait for the rectifier to power down.
2 Insert a plastic stick between the front panel grills to block
the fan rotation.
3 Turn the rectifier On. Wait for a few seconds; the rectifier
must issue an RFA alarm and the plant must generate a
PMN.
4 Remove the fan obstruction and toggle the power switch Off
and back On to restart the rectifier and retire the alarm.
5 Generate an RFA (Rectifier Fail Alarm) in each of the plant
rectifiers individually and verify that the RECT and MINOR
LEDs become active along with the Power Minor and RFA
alarm relays.