Ormazabal cgm.3 system Series - 5.7.3 Earthing switch disconnection; 5.7.4 Earthing switch connection

Recommended sequence of operations
General instructions
IG-136-EN version 10; 23/06/2016
49
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
5.7.3 Earthing switch disconnection
1. Move the driving shaft access handle in the yellow
zone to its lower position.
2. Insert the lever in the earthing switch driving shaft,
move the driving arm to the end and turn anti-
clockwise 90º.
Figure 5.35 Lever turn process
3. Verify that the cubicle is in earthing open position.
Figure 5.36 Earthing switch open
5.7.4 Earthing switch connection
1. Move the driving shaft access handle in the yellow
zone to its lower position.
2. Insert the lever in the earthing switch driving shaft,
move the driving arm to the end and turn clockwise
90º.
Figure 5.37 Lever turn process