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

10.7 Racking the withdrawable circuit-breaker to service position

Position indicators of withdrawable circuit-breaker visible on high-voltage door:
Preconditions

Withdrawable circuit-breaker 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 available

Double-bit key available

Padlock (optional) removed from operating slide

For electromagnetic interlock (optional):

Electromagnetic interlock deactivated
The actuating opening for racking the withdrawable circuit-breaker is located on the control board of the
high-voltage door.
Fig. 39: Actuating opening for
racking the withdrawable
circuit-breaker
139-2021.9 / 07
NOTICE
Maloperation
Racking the withdrawable circuit-breaker 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.
Fig. 37: Type 3AE1
Fig. 40: Racking crank
Operating the circuit-breaker panel
Fig. 38: Type 3AE5
NXAIR M
Fig. 41: Double-bit key,
diameter 5 mm
35