IG-123-EN version 11; 23/07/2021
10
General description General instructions
cpg.0: GIS medium-voltage switchgear,
gas insulated, up to 40.5 kV,
in accordance with IEC Standard
Gas pressure relief duct (optional)
[3]
In accordance with model; see the unit's Name Plate.
The entire cubicle is prepared to withstand an internal arc in
the tank up to 31.5 kA - 1 s
[3]
, meeting the criteria of Annex
AA of Standard IEC 62271-200, accessibility class IAC: AFLR.
1
Gas pressure relief membrane
2
Gas vent from cable compartment
Figure 1.13. Pressure relief membrane and gas vent detail
A ue made of metal sheet, which conducts the gases
produced by an internal arc towards the top of the cubicle,
from any of the three compartments: gas tank, cable
compartment and busbar compartment.
Figure 1.14. Gas pressure relief duct (1)
Control compartment
Placed at the top of the cubicle and separate from the
medium-voltage area, this is ready for installation of the
metering equipment and protection relays. It contains
the terminal block with the control signals duly identied
in accordance with the wiring diagram provided with
the equipment. All the connections between the driving
mechanisms compartment and the control box are made
via connectors, which makes the assembly more exible,
and allows the control box to be assembled and connected
on site in a straightforward, direct way.
Figure 1.15. Control compartment detail
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