General Instructions
Operations sequence
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cpg.1
GIS-type medium-voltage switchgear with full insulation in gas, up to 38 kV,
in accordance with IEEE Standards
IG-197-US version 02; 07/11/2019
7.1.2 Medium voltage cable grounding
Initial conditions: Circuit breaker open, busbar
disconnector open and grounding disconnector
open.
1. Connect the grounding disconnector
(1)
by turning the
lever clockwise.
Figure 7.4
Condition after turning the lever
(1)
If all the switchgear elements are motorised, the grounding disconnector 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 7.5
Circuit breaker closed indicator detail
To open the medium voltage cable grounding,
ground 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.
Summary of Contents for velatia cpg.1
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