Lucent Technologies 415B Battery Plant for 4ESS
7 - 52 Retrofit of 415A Battery Plant
Issue 6 September 1999
AC Failure Test
The purpose of this test is to assure that no Rectifier Fail Alarm
(RFA) is generated under the most stringent ac failure
circumstances.
This test is performed with all rectifiers on line and a set load on
the battery plant. Set load per Table 7-D for test depending on
how many rectifiers are present.
1. Open the ac circuit breaker feeding the PDSC that is
powering the rectifier under test. The rectifier will shut off.
2. Verify that no rectifier failure alarm (RFA) is initiated.
3. Close the circuit breaker previously opened.
4. The rectifier returns to normal.
5. All alarms clear.
6. Repeat Steps 1 through 5 with less than 50 amperes load
for all rectifiers in plants. A momentary PHA may occur,
then an ACF, when power is first removed. Observe that
the ACF LEDs on the rectifiers light while ac is failed.
7. Restore the system to normal by closing all breakers
previously opened.
Galaxy
Controller
The Galaxy Controller for the 415B Battery Plant is ordered as
J85501F-1, L4. Table 7-E lists the circuit packs furnished with
the controller.
Table 7-D: Load Settings for AC Failure Test
Number of
Rectifiers in
Plant
Load Not
Less Than
2
100
3
200
4
300
5
400
