General instructions
Recommended sequence of operations
IG-136-EN version 10; 23/06/2016
54
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
5.8.6 Earthing operation from the open position
1. Move the driving shaft access handle to its lower
position.
2. Insert the lever in the earthing switch driving shaft,
move the drive arm to the end and press inwards
on the head of the lever with one hand, and turn 90º
clockwise with the other hand.
Figure 5.47 Lever turn process
3. Verify that the cubicle is in earthing position.
Figure 5.48 Earthing switch closed
5.9 Fuse replacement sequence
To access the fuse holders, first remove the cable
compartment cover. It is essential to close the earthing
switch. If any of the 3 fuses blows, the switch-disconnector
(a) will open automatically; this is indicated by the red
position indicator (b) located on the front of the driving
mechanism compartment.
Figure 5.49 Fuse blow trip indication
To Next Page
Loading...
Need help?
General
