General instructions
IG-136-EN version 10; 23/06/2016
3
cgm.3 system
Fully SF6 gas insulated medium voltage switchgear up to 40.5 kV in accordance with IEC Standards
Contents
1 General description ......................................................... 6
1.1 Models .................................................................................6
1.2 Standards applied........................................................................7
1.3 Main components ........................................................................7
1.3.1 Gas tank .........................................................................8
1.3.2 Driving mechanism compartment ......................................................8
1.3.3 Base.............................................................................9
1.3.4 Name plate ......................................................................10
1.4 Characteristics table.....................................................................11
1.5 Dimensions and weights .................................................................12
1.6 Operating conditions ....................................................................13
2 Handling and transport ..................................................... 14
2.1 Lifting means...........................................................................14
3 Storage .................................................................. 16
4 Installation ............................................................... 17
4.1 Unpacking the equipment ................................................................17
4.2 Location of accessories during transport ...................................................17
4.3 Minimum installation distances............................................................18
4.4 Recommended cable connection trench ....................................................19
4.4.1 Cubicles with internal arc in gas tank up to 20 kA - 0.5 s ...................................19
4.4.2 Cubicles with classification of internal arc IAC up to 25 kA - 1 s ..............................22
4.5 Fastening to the floor ....................................................................26
4.5.1 Fastening to the floor on profile .......................................................26
4.5.2 Fastening to the floor by anchoring ....................................................26
4.6 Connecting the cubicles .................................................................29
4.7 Earthing the switchgear ..................................................................29
4.8 Cable connections ......................................................................30
4.8.1 Horizontal front connection ..........................................................30
4.8.2 Cable connection in fuse protection function 1400 mm high .................................31
4.9 Assembly and connection of measuring transformers in cgm.3-m ...............................33
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