Operations sequence
General instructions
55
cpg
.1
Fully SF6 gas insulated single and double busbar GIS switchgears up to 36 kV in accordance
with IEC Standards
IG-137-EN version 03; 24/06/2016
7.7.2 Main busbar earthing
Initial conditions
: feeder disconnectors open,
earthing switches open and circuit breaker
open.
1. First connect the left feeder disconnector by turning
the lever clockwise.
Figure 7.56
Lever turn detail
2. Then connect the right earthing switch by turning the
lever clockwise.
Figure 7.57
Lever turn detail
3. The circuit breaker closes instantaneously on removal
of the driving lever.
Figure 7.58
Circuit breaker closed detail
To open the earthing connection, earth
connection, reverse the sequence of operation:
first, open the circuit breaker by acting on the
bottom pushbutton, then the earthing switches
and lastly open the feeder disconnectors.
The circuit breaker opening operation is always
performed manually.
Summary of Contents for Ormazabal cpg.1 Series
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