Siemens NXAIR - Racking the Withdrawable Circuit-Breaker; Circuit-Breaker Truck to Service Position

Operating the circuit-breaker panel
110-0134.9 / 14 NXAIR / ≤ 40 kA 47
10.8 Racking the withdrawable circuit-breaker / circuit-breaker truck to service position
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 indicators on high-voltage door for circuit-breaker types 3AE1 and 3AE5
Fig. 55: Circuit-breaker type 3AE1:
Position indicator OPEN
Fig. 56: Circuit-breaker type 3AE5:
Position indicator OPEN
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