Test Operation With Auxiliary Voltage (Motor Operating Mechanism) - Siemens NXPLUS C Installation And Operating Instructions Manual

Operation
Circuit-breaker with
stored-energy mechanism
Circuit-breaker with
spring-operated
mechanism
134/172
ATTENTION!
If the retaining screw of the striker is not shifted back from position A to position B after the
test operation without auxiliary voltage, the undervoltage release will not function.
After the test operation without auxiliary voltage, shift the retaining screw of the striker

back from position A to position B.
Shift the retaining screw of the striker from position A to B to activate the undervoltage

release.
20.4

Test operation with auxiliary voltage (motor operating mechanism)

Switch on the supply voltage.

The motor operating mechanism starts up and charges the closing spring.
r
Check whether the "closing spring charged" indication appears.

Close the circuit-breaker.

The closing spring is recharged automatically.
r
Check whether the position indication "circuit-breaker CLOSED" appears.

Open the circuit-breaker.

Check whether the position indication "circuit-breaker OPEN" appears.

Switch on the supply voltage.

The motor operating mechanism starts up, charges the closing spring and opens
r
automatically.
Check whether the position indication "circuit-breaker CLOSED" appears.

Open the circuit-breaker.

Check whether the position indication "circuit-breaker OPEN" appears.

Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9