What is an Arc ? | Arc in Circuit Breaker

Before going through details of arc quenching or arc extinction technologies employed in circuit breaker we should know first what is arc actually. What is an Arc? During opening of current carrying contacts in a circuit breaker the medium in between opening contacts become highly ionized through which the interrupting current gets low resistive path … Read more

Arc Interruption Theory

The insulating material (may be fluid or air) used in circuit breaker should serve two important functions. They are written as follows: It should provide sufficient insulation between the contacts when circuit breaker opens. It should extinguish the arc occurring between the contacts when circuit breaker opens. The second point needs more explanation. To understand … Read more