How many types of switchgear panels

The switchgear is mainly classified into two types, the outdoors type and the indoor type. For voltage above 66kV, the outdoor switchgear is used. Because for the high voltage, the building work will unnecessarily increase the installation cost owing to large spacing between the conductor and large size of insulators.

Below the 66kv there is no difficulty in providing the building work for the switchgear at a reasonable cost. The indoor type switchgear is of metal clad type and is compact. Because of the compactness, the safety clearance for operation is also reduced and thus reduced the area required.

Indoor type switchgear would be mounted into KIOSK or Substation enclosure, to achieve IP54 for outdoor use, similar as compact Substation;

Indoor type switchgear also include two main type:

One is switchgear with Vacuum Circuit Breaker or SF6 Circuit Breaker inside; such as KYN28 with draw-able type or XGN15 fixed type switchgear panel;

Another is GIS, SIS for Ring Main Unit system, such as SRM16 type GIS, Solid Insulated Switchgear SIS16 type; nowadays with technology develop, ECO air (N2 + Clean dry air) for insulation gas were available.