Switchgear directly affects the safety, reliability, and flexibility of an electricity system. It is found in the electric network substations of utilities and industrial plants, as well as in the power supply systems of buildings, public transport systems and even ships.
Switchgear has two basic functions:
Switchgear exists in all voltage classes, from 220 V up to 1,100 kV. The switchgear system is installed inside a cabinet, which can be mounted either inside or outside a building. The exception to this is a situation involving very high voltages; in that event, they are placed in an open space.