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

Operating the circuit-breaker panel
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

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
Fig. 109: Instruction label on the
70
INFORMATION
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.
INFORMATION
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.
withdrawable circuit-breaker / circuit-breaker truck
NXAIR / ≤ 40 kA
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