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
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.
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
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.
Fig. 109: Instruction label on the
withdrawable circuit-breaker / circuit-breaker truck