What is the VCB?

Basically the VCB is a vacuum circuit breaker. And the vacuum circuit breaker is a type of medium voltage circuit breaker. Circuit breakers are all about extinguishing high-tripping currents or arcs that occur in power-off conditions. So, when the vacuum is used to extinguish the arc, it is called a vacuum circuit breaker. VCB is used at voltages from 11KV to 33KV. A large amount of arcing occurs when the stationary and moving contacts move away from each other in a tripped or off condition. In this circuit breaker, since the arcing takes place in a vacuum enclosure, the dielectric strength of the vacuum increases during arc formation. It automatically reduces or cancels the high currents that are generated. It has dielectric recovery character, excellent interruption and can interrupt high-frequency current caused by arc instability, superimposed on line frequency current.