Recommended sequence of operations
General instructions
IG-136-EN version 10; 23/06/2016
59
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
5.10.3 Opening operation from earthing position
Initial conditions: earthing switch closed and
circuit breaker closed.
1. Move the access handle in the yellow zone to its
lower position.
Figure 5.62 Earthing switch driving shaft access handle detail.
2. Insert the lever in the earthing driving shaft, move the
driving arm to the end and turn anti-clockwise.
Figure 5.63 Lever turn details
3. Verify that the cubicle is in disconnected position.
Figure 5.64 Earthing switch open
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