Vacuum Circuit Breaker – Fundamentals of VCB Breaker

A vacuum circuit breaker is the type of circuit breaker in which the medium of arc quenching is the vacuum. In this post, you’ll learn the fundamentals of¬†vacuum circuit breaker.

How Vacuum Circuit Breaker Looks

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Pic Credits: Tony R. Kuphaldt Instrumentation Book

How VCB Breaker Works

The video below illustrates the working of a vacuum circuit breaker:

Advantages of Vacuum Circuit Breakers

  1. They are compact and reliable
  2. Low arc energy
  3. No generation of gas is associated
  4. Little maintenance os required
  5. They can break heavy fault currents

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