33 kV Gas Insulated Switchgear Part 1

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33 kV Gas Insulated Switchgear In Underground metro stations, there are two 33 kV auxiliary substations in each station. These substations have GIS type switchgear installation, separate earth mats and METs, a switching room or feeder post for ROCS charging.   I tried to keep a short, crisp summary of a typical 33 kV GIS switchgear which might help in working in a 33kV substation.   The insulating gas for this switchgear would  be SF6 Sulphur Hexafluoride, at a temperature 20 °C at 0.05 MPa. Bus Rating would be 33 kV GIS, 25 kA for 3 sec, Single bus bar […]