Operating The Three-Position Switch With Motor-Operating Mechanism; Emergency Operation Of The Three-Position Switch With Slow Motion Mechanism - Siemens NXPLUS C Installation And Operating Instructions Manual

Final activities
Preparing the operating
lever
806-9004.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 02
➭ Remove the operating lever.
✔ The interrogation lever and the control gate return to their initial position.
➭ For an air-insulated metering panel: Execute the same operations with the second three-
position disconnector.
24.5

Operating the three-position switch with motor-operating mechanism

The switching operations DISCONNECTING and READY-TO-EARTH of the three-position
disconnector can be performed by means of a motor operating mechanism (option).
Three-position disconnectors with motor operating mechanism can also be controlled from
remote depending on their design.
24.6 Emergency operation of the three-position switch with slow motion
mechanism
The following section describes emergency operation of the three-position switch with slow
motion mechanism and motor control.
If the three-position switch is not in either of the end positions (fault position), emergency
operation has to be carried out. This is necessary, for example, if the motor power supply has
failed.
Emergency operation is done by hand. Using an emergency adapter for the operating lever,
the three-position switch is switched to the end position. The emergency adapter is in the
service flap at the factory.
Switch position indicators
Disconnector fault position
➭ Put the emergency adapter on the operating lever. The positions of the slots and
protrusions on the operating lever and emergency adapter are not relevant.
Incorrect alignment of the emergency adapter
Incorrect alignment of the emergency adapter on the operating shaft can damage the switch
position indicator or the three-position switch operating mechanism during switching.
➭ Attaching: Align the operating lever with the emergency adapter to the operating shaft
based on the inner slot of the emergency adapter.
➭ Switching: Use the outer slots of the emergency adapter to identify the switching position.
Earthing switch fault position
NOTICE
Operation
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