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32
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73 The Fundamentals of Vacuum Circuit Breakers
A vacuum circuit breaker (VCB) is a type of electrical switchgear that operates by isolating a circuit under fault conditions. It is primarily used in medium-voltage applications to protect electrical circuits from overcurrents and short circuits.
The core component of a VCB is its vacuum interrupter. Inside this interrupter, electrical contacts are enclosed in a vacuum. When the circuit...
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