Siemens NXPLUS C - De-Earthing with the Three-Position Switch; Earthing;Ready-To-Earth with the Three-Position Switch

Operation
194/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
✔ The three-position switch is open.
➭ Remove the operating lever for the DISCONNECTING operation.
✔ The interrogation lever and the control gate return to their initial position.
21.3 Earthing/ready-to-earth with the three-position switch
➭ In circuit-breaker panels: Open the circuit-breaker.
➭ Push the interrogation lever downwards.
➭ Push the control gate to the right.
✔ The opening for the EARTHING/READY-TO-EARTH operation is free.
➭ Insert the operating lever for the EARTHING/READY-TO-EARTH operation (red ball handles)
and,
- with spring-operated mechanism / spring-operated/stored-energy mechanism (600 mm
panel), turn 90° clockwise;
- with slow motion mechanism (900 mm panel), turn 180° clockwise.
✔ The three-position switch is closed.
➭ Remove the operating lever for the EARTHING/READY-TO-EARTH operation again.
✔ The interrogation lever and the control gate return to their initial position.
➭ In circuit-breaker panels, close and lock the circuit-breaker.
21.4 De-earthing with the three-position switch
➭ Check service readiness (see page 189, "Ready-for-service indicator").
➭ In circuit-breaker panels: Unlock the locking device at the circuit-breaker and open the
circuit-breaker.
➭ Push the interrogation lever downwards.
➭ Push the control gate to the right.
✔ The opening for the EARTHING/READY-TO-EARTH operation is free.
➭ Insert the operating lever for the EARTHING/READY-TO-EARTH operation (red ball handles)
and,
- with spring-operated mechanism / spring-operated/stored-energy mechanism (600 mm
panel), turn 90° counter-clockwise.
- with slow motion mechanism (900 mm panel), turn 180° counter-clockwise.
CAUTION
Internal arcing hazard and explosion hazard
Operating the three-position disconnector under load can cause injury or property
damage.
A mechanical interlock prevents, as standard, the three-position disconnector from being
operated under load. The switchgear can optionally be equipped in accordance with a
customer-specific intrlocking and control scheme.
➭ If the customer-specific interlocking and control scheme requires that the panel be
provided without electromechanical or mechanical interlocks, the three-position
disconnector can be operated under load.
➭ Do NOT operate the three-position disconnector under load.
WARNING
Hazardous voltage
Can cause death or serious injury.
In panels with circuit-breaker, the earthing process is not completed as long as the circuit-
breaker remains open.
➭ Switch the three-position disconnector to READY-TO-EARTH position.
➭ Close the circuit-breaker.