Lucent Lineage
®
2000 ECS Battery Plant H569-408
4 - 6 Maintenance
Issue 2 July 1996
Blown Fuse on
CP5
Refer to ECS controller manual for troubleshooting procedures.
Repair and
Replacement
Load Circuit
Breaker
Replacement
STEP A: Obtain a replacement circuit breaker. See paragraph
“Spare Parts.”
STEP B: Verify that the faulty breaker is in the OFF position.
STEP C: Loosen the 1/4 turn fasteners and open the dc
distribution cover.
STEP D: Measure the voltage at the load connection associated
with the faulty breaker, to verify that the breaker is truly open.
The voltage relative to the battery bus bars or circuit breaker bus
bar should be approximately the float voltage of the plant.
If the faulty breaker is, in fact, still closed, the load equipment
which it powers must be shut down so that no current flows
through the breaker.
STEP E: Unplug the faulty breaker from the printed wiring
board.
STEP F: Switch the new circuit breaker to the OFF position
before plugging it in.
STEP G: Plug in the new breaker, ensuring that line, load and
alarm connectors are properly mated. (See Figure 2.4)
Note
Replace with fuse of same rating only.
Note
Procedures in this paragraph may cause power alarms to be
issued temporarily. Notify the alarm reporting center before
starting any repair procedure.
DANGER
Do not attempt to unplug a circuit breaker which may be
carrying current. Arcing may result in personnel injury and
equipment damage.