General description
General Instructions
IG-136-EN version 10; 23/06/2016
7
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
1.2 Standards applied
Standard Description
IEC 62271-1 Common specifications for high-voltage switchgear and controlgear standards.
IEC 62271-100 High-voltage alternating current circuit-breakers.
IEC 62271-102 Alternating current disconnectors and earthing switches.
IEC 62271-103 High-voltage switches for rated voltages above 1 kV up to and including 52 kV.
IEC 62271-105 Alternating current switch-fuse combinations.
IEC 62271-200
Alternating current metal-enclosed switchgear and controlgear for rated
voltages above 1 kV and up to and including 52 kV.
IEC 62271-206 / IEC 61243-5 Voltage presence indicating systems.
IEC 60529 Protection grades for enclosures.
IEC 60282-1 Current-limiting fuses.
1.3 Main components
Figure 1.1 Main elements of cgm.3 cubicles
1. Gas tank
1.1. Side connection female bushings
2. Driving mechanism area
2.1.Name plate
2.2.Operating sequence plate
2.3. Driving shafts (see mimic diagram of each model).
2.4. ekor.vpis / ekor.ivds* Voltage presence detection unit
2.5. ekor.sas* acoustic earthing prevention alarm unit.
3. Base
3.1 Cable compartment access cover
3.2 Medium-voltage cable fastening support
3.3.Gas relief compartment
3.4.Earth collector
3.5 Front cable connection bushings
* Optional elements.
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