General Instructions
Operations sequence
40
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
7.2.2 Medium voltage cable earthing
Initial conditions
: Circuit breaker open, feeder
disconnectors open and earthing switch open.
1. Connect the earthing switch
(1)
by turning the lever
clockwise.
Figure 7.9
Lever turn detail
(1)
If all the switchgear elements are motorised, the earthing switch and
circuit breaker closing operations are performed consecutively as
programmed from the automated operation panel.
2. The circuit breaker closes instantaneously on removal
of the driving lever.
Figure 7.10
Circuit breaker closed detail
To open the medium voltage cable earthing,
earth connection, reverse the sequence of
operation. Act on the “0” pushbutton to open
the circuit breaker.
The circuit breaker opening operation is always
performed manually.
7.2.3 Replacing a busbar
Figure 7.11
Initial situation for busbar change operation
Busbar change is automated.
Summary of Contents for Ormazabal cpg.1 Series
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