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Arc in a circuit breaker is interrupted at

  • Arc in a circuit breaker is interrupted at Zero current.
  • When the current is interrupted, an arc is created between the contacts of the circuit breaker.
  • The arc is essentially an ionized channel of gas that conducts electricity.
  • The arc can generate a lot of heat and can cause damage to the circuit breaker if it is not interrupted quickly.
  • Ideally, the arc should be interrupted when the current passing through it reaches zero.
  • This is because when the current is zero, there is no energy left in the circuit to maintain the arc.
  • Interrupting the arc at zero current ensures that the arc is extinguished quickly and efficiently, minimizing the damage to the circuit breaker.