Lucent Technologies ECS Minicell Battery Plant H569-420
7 - 6 Maintenance
Issue 5 February 1997
8. Turn on the load circuit breaker. If the circuit breaker trips
immediately when turned on, this may be due to inrush
current and does not necessarily indicate a fault condition.
Attempt to close the circuit breaker a second time. If the
breaker trips again, check the wiring to the load circuit.
9. After the circuit breaker is turned on again, the Fuse Alarm
Major (MJF) and its associated alarms should be retired.
LVD/R
Contactor
Replacement
The procedure below assumes the following:
•
Contactor coil has failed.
•
The contactor is open.
•
The rectifiers are carrying the load (off battery) with excess
capacity available for charging the batteries.
•
Battery string(s) are at a voltage below the rectifier voltage
in a state of partial or complete discharge.
•
LVD OPEN LED is lit on the distribution front panel.
To replace the LVD contactor, you’ll need the following
equipment:
•
socket wrench with insulated handle
•
1/2 inch socket
Refer to Figure 2-3 (page 2-7) and T-83260-30 drawing
throughout this procedure.
1. Remove rectifier in position directly beneath LVD/R
contactor (position 1), if present.
2. Open distribution panel and unplug connector P501 from
J501 on LVD/Fuse board (CP5). Leave cable dressed.
Warning
Before applying power to any individual load, follow the turn
up instructions provided in the associated load equipment
documentation.
Note
The battery plant must have sufficient redundant capacity in
order to remove one rectifier without shutting the plant down.
