Recommended sequence of operations
General instructions
IG-136-EN version 10; 23/06/2016
43
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
5.5.4 Opening operation from closed position
1. Move the driving shaft access handle to its lower
position.
2. Disconnecting operation:
a) Manual operation (B driving mechanism). Insert
the lever in the switch access (grey area), move
the driving arm to the end and turn anti-clockwise
90º.
Figure 5.21 Lever turn process
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 disconnection position.
Figure 5.22 Switch-disconnector open
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