Ormazabal cpg.0 - Page 54

IG-123-EN version 11; 23/07/2021
54
Operations sequence General instructions
cpg.0: GIS medium-voltage switchgear,
gas insulated, up to 40.5 kV,
in accordance with IEC Standard
Cable test
Once the earthing switch is closed and the cable
compartment cover removed, proceed as follows:
1. With a at screwdriver, or similar tool, push through
the "cable compartment cover open" interlock
slot, releasing this interlock and the circuit-breaker
operating pushbuttons.
Figure 7.47. Operation pushbuttons release process
2. Press the "0" pushbutton to disconnect the circuit-
breaker.
3. Open the earthing switch. For safety reasons, it is
advisable to padlock access to the feeder disconnector
operation.
4. Press the "I" pushbutton to connect the circuit-breaker.
Return the cubicle to its initial condition by proceeding in
reverse order:
1. Press the "0" pushbutton to disconnect the circuit-
breaker.
2. Close the earthing switch.
3. Press the "I" pushbutton to connect the circuit-breaker.
4. Lift the cable compartment cover interlock with a
at screwdriver or similar, and position the cable
compartment cover.
Figure 7.48. Operation pushbuttons
interlocking process
5. Press the "0" pushbutton to disconnect the circuit-
breaker.
6. Open the earthing switch.
7. Close the feeder disconnector.
8. Press the "I" pushbutton to connect the circuit-breaker.