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6-18 Replacing modules in a BIP
Procedure 6-4 (continued)
Replacing a circuit breaker in the BIP
Step
3
4
5
6
7
8
9
10
11
12
13
AccessNode P0904244 Issue 1.0
Action
DANGER
Risk of electric shock
The BIP breaker panel contains live electrical
connections which pose a threat of electrical shock. Be
extremely careful to ensure that the circuit breaker
leads and contact posts do not short out to the
grounded BIP framework.
CAUTION
Critical lead length
The wiring leads on the BIP circuit breakers are short.
When you pull the breaker out of its slot in the following
step, use care and caution to avoid disconnecting the
spade lug connections on the rear of the breaker.
Disengage the circuit breaker locking latch and grasp the affected circuit
breaker and gently pull it straight out of the panel slot (see Figure 6-11).
Using the insulated needle-nosed pliers, disconnect the –48 V dc In lead from
the top contact on the rear of the circuit breaker.
Note: You are working on a powered system. You must use fully insulated
needle-nosed pliers at all times when grasping connectors or leads.
Ensure that the replacement circuit breaker in the OFF position.
Remove the alarm leads and move them to the same contact points on the
replacement circuit breaker.
Remove the –48 V dc Out lead from the bottom contact on the rear of the
circuit breaker.
Connect the –48 V dc Out lead to the same contact post on the replacement
circuit breaker.
Connect the –48 V dc In lead to the same contact post on the replacement
circuit breaker.
Gently reinsert the circuit breaker into its slot in the BIP and ensure that the
locking latch is engaged.
Reinstall and secure the circuit breaker access panel on the BIP.
Turn the circuit breaker to the ON position.
Repeat from step 1 for any other circuit breaker requiring replacement.
—continued—
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