Lucent Technologies 415B Battery Plant for 4ESS
7 - 26 Retrofit of 415A Battery Plant
Issue 6 September 1999
Phase Failure
Test
1. Increase the load to 30-42 amperes.
2. With the Power switch still in the On position, turn off the
ac service and note that the rectifier has shut down and that
the MAN LED on the test box is off.
3. Verify that no ac voltages are present on the input leads of
the ac input contactor.
4. Disconnect one of the colored leads (blue, red, or white) on
the input side of the contactor.
Note: Both blue wires have to be removed.
5. Turn on the ac. The rectifier should not restart. The display
and alarm outputs to the test box may blink.
Figure 7-11: Partial Sketch of CM3 Digital Meter Board
S301
S304
S306
S302
S303
S305