Operation
190/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
20 Operating the circuit-breaker
20.1 Closing the circuit-breaker
If there is no block active from the mechanical interlock, the circuit-breaker can be closed
electrically (if provided) or mechanically.
Control voltage failure If the control voltage fails, the circuit-breaker must be closed mechanically (pushbutton).
Closing the circuit-breaker ➭ Operate the ON pushbutton in the mechanical or electrical control board.
✔ The circuit-breaker is closed.
20.2 Opening the circuit-breaker
The circuit-breaker can be opened electrically (if provided) or mechanically.
Control voltage failure If the control voltage fails, the circuit-breaker must be opened manually.
Locking device If the feeder is earthed through the three-position disconnector and the circuit-breaker, and if
the "feeder locking device" is fitted, all electrical opening commands are ineffective.
If the locking device is padlocked, the circuit-breaker cannot be opened mechanically either.
Opening the circuit-
breaker
➭ Operate the OFF pushbutton in the mechanical or electrical control board.
✔ The circuit-breaker is open.
20.3 Charging the closing spring
Closing spring The closing spring is charged automatically after applying control voltage. The energy
required for the operating sequence OPEN-CLOSE-OPEN (auto-reclosing) is stored in the
closing spring about 15 seconds after closing the circuit-breaker operating mechanism.
Control voltage failure If the control voltage fails, the closing spring can be charged with a hand crank. The hand
crank is equipped with a freewheel. If the control voltage returns while the hand crank is
inserted, the freewheel prevents injuries caused by the starting motor.
➭ Remove cover from cutout.
➭ Insert hand crank.
➭ Turn hand crank clockwise approx. 30 turns.
✔ The indication "closing spring charged" appears in the inspection window.
➭ Remove hand crank.
➭ Close cutout with cover.
CAUTION
High speed moving parts
Using an incorrect hand crank can cause injury.
➭ Use exclusively the hand crank provided with the switchgear accessories.
The hand crank supplied features a freewheel function. The freewheel function
disconnects an inserted hand crank from the charging system when the motor charges the
closing spring.
To Next Page
Loading...
Need help?
General
