Plugging On The Low-Voltage Connector - Siemens NXAIR M Operating Instructions Manual

If no withdrawable circuit-breaker is inserted in the panel and no further operation is
executed: Close the high-voltage door.

The removed low-voltage connector is lying in the support located underneath the low-
voltage compartment.

10.18 Plugging on the low-voltage connector

Preconditions

Withdrawable circuit-breaker in test position

Spring energy store in the circuit-breaker discharged

Auxiliary voltage for the panel disconnected

High-voltage door open

Low-voltage connector stowed away
Procedure
139-2021.9 / 07
HINT
Unexpected motor noise and vibration
When auxiliary voltage is applied, a motor inside the circuit-breaker starts
immediately after plugging on the low-voltage connector in order to charge the
spring energy store. This is a permissible operating state.
Expect motor noise and low vibration.
HINT
In addition to these instructions, an instruction label on the withdrawable circuit-
breaker informs about plugging on the low-voltage connector.
Follow the advice on the label (3) to push the longitudinal fastener.
Fig. 89: Instruction label on withdrawable circuit-breaker
Operating the circuit-breaker panel
NXAIR M 57