Switchgear is an apparatus that is used for regulating, controlling, and switching the electrical circuit on and off in an electrical power system. Various examples of switchgear devices include fuses, switches, relays, potential transformers, lightning arresters, indicating instruments, and control panels.
Switchgear present in an electronic system is made up of electrical disconnect switches, circuit breakers, or fuses that are used for controlling, isolating, and protecting the electrical equipment. It is used for the purpose of de-energizing equipment so that the work may be done and for clearing the faults occurring downstream.
In earlier times, the central power stations used open knife switches that were mounted on insulating panels of asbestos or marble. Voltages and the levels of power escalated swiftly by creating openings with switches being manually operated. These were considered highly lethal for everything except for the isolation of de-energized circuits.
Switchgear equipment that is filled with oil allows the arc energy to be safely controlled and remain contained. By the early times of the 20th century, the switchgear line-up turned into a metal-enclosed structure having switching elements that were being operated electrically by using the oil circuit breakers.
Presently, the oil-filled equipment has been replaced by the air-blast, SF equipment, or vacuum. This allows the power levels and large currents to be safely controlled by the automatic equipment. Invented by the end of 19thcentury the high-voltage switchgear was used for the purpose of operating motors and electric machines.
Switchgear panels are found in transformer stations, commercial and industrial buildings, paper mills, metal smelters, distribution substations, and transformer stations. These are mainly used in places where the electric energy is distributed or utilized in various zones.
Post time: Dec-31-2022