Operating the circuit-breaker panel
70 NXAIR / ≤ 40 kA 110-0134.9 / 14
If no withdrawable circuit-breaker / circuit-breaker truck 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.
10.19 Plugging on the low-voltage connector
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.
Preconditions
• Withdrawable circuit-breaker / circuit-breaker truck 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
In addition to these instructions, an instruction label on the withdrawable circuit-
breaker / circuit-breaker truck informs about plugging on the low-voltage
connector.
Follow the advice on the label (3) to push the longitudinal fastener.
Fig. 109: Instruction label on the
withdrawable circuit-breaker / circuit-breaker truck
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