GE Industrial Solutions Galaxy Verification - Manual (Page 92)

Galaxy Power System Verification Procedures
4 - 24 Replacement Procedures Issue 3 January 2008
Testing
Testing Additional
Alarms After
Replacing
Rectifiers
Alarm operation may be verified while the system operates at float
voltage.
Step Action
1 Turn OFF the ac circuit breaker of replaced rectifier. Verify
that the AC and MIN alarm LEDs illuminate, the rectifier
displays ACF, and the controller alarms screen indicates
RECTIFIER FAIL : G01 (SCF and Millennium controllers).
2 Turn ON the ac circuit breaker of the replaced rectifier.
Verify that the rectifier starts and the alarms retire.
Testing Rectifiers
and Load Share in
Bay Expansions
Step Action
1 Turn all rectifiers to STBY.
2 Connect a resistive load box (proper voltage) to the system’s
positive and negative bus bars.
3 Verify that the system load is less than 50 amperes.
4 Increase the system load to 50 amperes.
5 Turn ON all the rectifiers; after approximately 60 seconds,
verify that the load is divided equally among all the
rectifiers (within 2 amperes).
6 Reduce the system load. Verify that the rectifiers continue to
share the load.
7 Remove system load.