
Lucent Technologies Lineage
®
2000 ECS Battery Plant H569-416
Issue 2 August 1996
Maintenance 5 - 7
Step J: 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.
Step K: Note that Fuse Alarm Major (MJF) and its associated
alarms retire.
Step L: When all work on the dc distribution is complete,
refasten the cover panel.
LVD/R
Contactor
Replacement
The following assumptions are made:
•
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.
The following equipment is required:
•
socket wrench with insulated handle
•
1/2 inch socket
Procedure: (Refer to Figure 2-4 and T-83171-31 drawing)
1. Open distribution panel and remove front cover.
2. Unplug connector P501 from J501 on LVD/Fuse board
(CP5).
3. Disconnect and label the five quick connects from the
contactor coil and auxiliary switch.
4. Unbolt and remove contactor.
Warning
Procedures in this section may cause power alarms to be
issued temporarily. Notify the alarm reporting center before
starting any replacement procedure on an operating plant.