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

Operating the circuit-breaker panel

10.9 Racking the withdrawable circuit-breaker / circuit-breaker truck to test position

Position indicators on high-voltage door for circuit-breaker types 3AE1 and 3AE5
Fig. 65: Circuit-breaker type 3AE1:
Preconditions
•
Withdrawable circuit-breaker / circuit-breaker truck in service position
•
Circuit-breaker 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
The actuating opening for racking the withdrawable circuit-breaker / circuit-breaker truck is located on the
control board of the high-voltage door.
Fig. 67: Actuating opening for racking the
withdrawable circuit-breaker /
circuit-breaker truck
50
NOTICE
Maloperation
Racking the withdrawable circuit-breaker / circuit-breaker truck to test 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
Fig. 68: Racking crank
NXAIR / ≤ 40 kA
Fig. 66: Circuit-breaker type 3AE5:
position indicator OPEN
Fig. 69: Double-bit key,
diameter 5 mm
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