Operating The Circuit-Breaker; Closing The Circuit-Breaker; Opening The Circuit-Breaker; Test Operation - Siemens NXPLUS C Installation And Operating Instructions Manual

Closing the circuit-breaker

Opening the circuit-
breaker
802-9074.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • Revision 05
20

Operating the circuit-breaker

ATTENTION!
Operating the circuit-breaker locking device with the three-position disconnector in CLOSED
position can damage the switchgear.
Operate the circuit-breaker locking device only with the three-position disconnector in

READY-TO-EARTH position, and lock it with a padlock. The shackle of the padlock must
have a diameter of 6 mm or larger.
20.1 Closing the circuit-breaker
If there is no block active from the mechanical interlock, you can close the circuit-breaker
electrically or mechanically. Depending on the selected type of operating mechanism, the
circuit-breaker is automatically closed with an ON pushbutton or by charging the closing
spring.
Operate the ON pushbutton in the mechanical control board or charge the closing spring in

spring-operated mechanisms. For motor operating mechanisms the circuit-breaker can also
be closed on the electrical control board.
The circuit-breaker is closed.
r
20.2

Opening the circuit-breaker

You can open the circuit-breaker electrically or mechanically.
If the control voltage fails, you have to open the circuit-breaker manually.
If the feeder is earthed through the three-position disconnector and the circuit-breaker, and if
the "feeder locking device" is fitted, all electrical OFF signals are ineffective.
If the locking device is padlocked, the circuit-breaker cannot be opened mechanically either.
Operate the OFF pushbutton in the mechanical control board

or
open via electrical operation.

The circuit-breaker is open.
r
20.3

Test operation

Perform the following actions to guarantee that the circuit-breaker is ready for operation:
Charge the closing spring (see page 135, "Charging the closing spring manually with the

hand crank").
For circuit-breaker operating mechanisms with stored-energy mechanism, operate the ON

pushbutton in the mechanical control board.
The circuit-breaker is closed.
r
Operate the OFF pushbutton in the mechanical control board.

The circuit-breaker is open.
r
On circuit-breakers with undervoltage release 3AX1103:
Operation
133/172