In vacuum circuit breakers, vacuum typically at pressures ranging from 10-9 to 10-6 bar is used as the quenching medium.…
Switchgear generally refers to the switching devices and their combinations, with the related control, measuring, protective and regulating equipment. The…
Air-blast circuit breakers utilize a blast of compressed air typically at a pressure of 25–75 bar, which is directed across…
Air Circuit Breaker Features & Operation An air circuit breaker employs atmospheric air as its interrupting medium. The arc is…
A protective relay is basically an electrical device that detects a fault in a power system and initiates the operation…
Introduction Many modern designs of circuit breakers for use at transmission voltages utilize sulphur hexafluoride (SF6) gas both as an…
Switchgear is basically equipment used switch ON or OFF generators, transmission lines, distributors and other equipment under both normal and…
Causes of Power Surges Transient overvoltages in power systems may arise from a number of sources. Power disturbances resulting from…
Switchgear can be defined as equipment used for controlling, regulating and switching ON and OFF power circuits. Switchgear units range…
