Closing Or Opening The Circuit Breaker / Fuse Combination; Discharging Or Charging The Closing Spring; Earthing Or De-Earthing The Feeder Manually; Removing The Low-Voltage Connector - Siemens NXAIR M Operating Instructions Manual

13.6 Closing or opening the circuit breaker / fuse combination

The procedure for closing and/or opening the circuit breaker / fuse combination in the circuit breaker panel
with HV HRC fuse is identical with the procedure for closing and/or opening the circuit-breaker in the circuit-
breaker panel.
Preconditions for closing the circuit breaker / fuse combination

No HV HRC fuse tripped
For electrical closing and/or opening of the circuit breaker / fuse combination in the circuit
breaker panel with HV HRC fuse, see chapter 10.9 and/or 10.10.
For manual closing and/or opening of the circuit breaker / fuse combination in the circuit
breaker panel with HV HRC fuse, see chapter 10.11

13.7 Discharging or charging the closing spring

The procedure for discharging and/or charging the closing spring in the circuit breaker panel with HV HRC
fuse is identical with the procedure for discharging and/or charging the closing spring in the circuit-breaker
panel.
For discharging and/or charging the closing spring in the circuit breaker panel with HV HRC
fuse, see chapter 10.13 and/or 10.14.

13.8 Earthing or de-earthing the feeder manually

The procedure for earthing and/or de-earthing the feeder in the circuit breaker panel with HV HRC fuse is
identical with the procedure for earthing and/or de-earthing the feeder in the circuit-breaker panel.
For earthing and/or de-earthing the feeder in the circuit breaker panel with HV HRC fuse,
see chapter 10.15 and/or 10.16.

13.9 Removing the low-voltage connector

Preconditions

Withdrawable circuit-breaker / fuse combination in test position

Spring energy store in the circuit-breaker / fuse combination discharged

Auxiliary voltage for the panel disconnected

High-voltage door open

Low-voltage connector plugged on
Procedure
To detach the low-voltage connector, push the longitudinal fastener (1) of the coupling
upwards.
Remove the low-voltage connector (2) carefully to the front.
139-2021.9 / 07
Operating the circuit-breaker panel with HV HRC fuse
NXAIR M
and/or
10.12.
85