Recommended sequence of operations
General instructions
IG-136-EN version 10; 23/06/2016
47
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
b) Motorised operation (BM driving mechanism).
Activate the corresponding operation command.
When, for any reason, the motor stops
halfway through a motorised operation,
before restarting it you must nish the
operation manually, so that the whole
mechanism: sensors, controllers, etc., are in
a reliable, effective and logical position for the
control system of the motorised unit when it is
switched back on.
3. Verify that the cubicle is in disconnected position.
Figure 5.30 Switch-disconnector open
5.6.6 Earthing operation from open position
1. Move the driving shaft access handle in the yellow
zone to its lower position.
a) Insert the lever in the earthing switch driving
shaft, move the driving arm to the end and turn
clockwise 90º.
Figure 5.31 Lever turn process
2. Verify that the cubicle is in earthing position.
Figure 5.32 Earthing switch closed
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