Lucent Lineage
®
2000 ECS Battery Plant H569-408
Issue 2 July 1996
Maintenance 4- 7
STEP H: For safety, close the dc distribution door before
proceeding to the next step.
STEP I: 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 J: Note that Fuse Alarm Major (MJF) and its associated
alarms retire.
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 2-3 and T-82670-30 drawing.)
DANGER
Before applying power to any individual load, follow the
power-up instructions provided in the associated load
equipment documentation.
Warning
Procedures in this paragraph may cause power alarms to be
issued temporarily. Notify the alarm reporting center before
starting any replacement procedure on an operating plant.