Vacuum Circuit Breakers are commonly used in medium voltage power networks. VCBs are highly reliable and provide excellent interruption capabilities. During normal conditions the current carrying contacts are closed to each other but during fault condition they start separating and an arc phenomenon occurs between them. The arc is quickly extinguished as the metal ions and electrons released during ionisation condense, restoring dielectric strength.Get to know about this buy vacuum circuit breakers in the link https://surplusrecord.com/ .