GE Industrial Solutions GPS 4848_100 Users Guide (dual rectifier shelf) - Manual (Page 81)

Galaxy Power System 4848/100 with Dual Rectifier Shelf
Issue 5 September 2011 Maintenance and Replacement 11 - 9
Testing
Note: Consult the GPS Installation Guide for complete testing
guidelines for new installations. Alarm LEDs refer to the controller
unless otherwise noted.
Testing Additional
Alarms After
Replacing
Rectifiers
Alarm operation may be verified while the system operates at float
voltage.
Testing Additional Alarms After Replacing Rectifiers
Step Action
1 Turn OFF the ac circuit breaker of replaced rectifier. Verify
that AC and MIN alarm LEDs illuminate, the rectifier
displays ACF, and the controller alarms screen indicates AC
FAIL: Gmm.
2 Turn ON the ac circuit breaker of the replaced rectifier.
Verify that the rectifier starts and the alarms retire.
3 Turn OFF the DC Output CB at the bottom left of the
rectifier. Verify that the Rectifier and Minor alarm LEDs
illuminate, the rectifier displays Cb, and the controller alarms
screen indicates RECTIFIER FAIL: Gmm.
4 Turn ON the DC Output CB of the rectifier. Verify that the
rectifier picks up load similar to others in the system and that
the alarms retire.
Testing Rectifiers
and Load Share in
Bay Expansions
Testing Rectifiers and Load Share in Bay Extensions
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 200 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.