Circuit-Breaker Test Operation - Siemens NXPLUS C Installation And Operating Instructions Manual

Without auxiliary voltage
With auxiliary voltage
(motor operating
mechanism)
802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11
20.4

Circuit-breaker test operation

Perform the following actions to guarantee that the circuit-breaker is ready for operation:
➭ Charge the closing spring (see page 190, "Charging the closing spring").
➭ Operate the ON pushbutton in the mechanical control board.
✔ The circuit-breaker is closed.
➭ Operate the OFF pushbutton in the mechanical control board.
✔ The circuit-breaker is open.
On circuit-breakers with undervoltage release 3AX1103:
Blocked undervoltage release
Can cause property damage.
The undervoltage release will not function if its retaining bolt is inserted in position A. After test
operation without auxiliary voltage, the undervoltage release must be activated.
➭ Remove the retaining bolt from position A and insert it in position B.
➭ Shift the retaining screw of the striker from position A to B to activate the undervoltage
release.
➭ Switch on the supply voltage.
✔ The motor operating mechanism starts up and charges the closing spring.
➭ Check whether the "spring charged" indication appears.
➭ Close the circuit-breaker.
✔ The closing spring is recharged automatically.
➭ Check whether the position indication "circuit-breaker CLOSED" appears.
➭ Open the circuit-breaker.
➭ Check whether the position indication "circuit-breaker OPEN" appears.
NOTICE
Operation
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