Racking The Withdrawable Circuit-Breaker / Circuit-Breaker Truck To Service Position - Siemens NXAIR Operating Instructions Manual

10.8 Racking the withdrawable circuit-breaker / circuit-breaker truck to service position

Position indicators on high-voltage door for circuit-breaker types 3AE1 and 3AE5
Fig. 55: Circuit-breaker type 3AE1:
Preconditions
•
Withdrawable circuit-breaker / circuit-breaker truck in test position
•
Low-voltage connector plugged on
•
High-voltage door closed
•
Circuit-breaker in OPEN position
•
Feeder earthing switch in OPEN position
•
Racking crank for moving the withdrawable circuit-breaker / circuit-breaker truck available
•
Double-bit key available
•
Padlock (optional) removed from operating slide
•
For electromagnetic interlock (optional):
•
Electromagnetic interlock deactivated
•
For panels with removable voltage transformers (optional):
•
Door to voltage transformer compartment closed and screwed tight
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NOTICE
Maloperation
Racking the withdrawable circuit-breaker / circuit-breaker truck to service position
is only permissible if the circuit- breaker is in OPEN position.
Check through the inspection window in the high-voltage door if the
circuit-breaker is in OPEN position.
Switch the circuit-breaker to OPEN position, if required.
Position indicator OPEN
NXAIR / ≤ 40 kA
Operating the circuit-breaker panel
Fig. 56: Circuit-breaker type 3AE5:
Position indicator OPEN
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