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8/4/2020Vacuum circuit breaker (VCB) Vacuum circuit breakers are used for a voltage range of 3 kV to 38 kV. The main part of the VCB is a vacuum container or also called as bottle. It is of moving and fixed contacts that close and opens inside a vacuum arc chamber, where the arc quenching takes place. VCB's are installed in both indoor and outdoor units.Get price

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