what is a circuit breaker

Circuit breakers provide a manual means of energizing and de-energizing a circuit and automatic overcurrent protection.

Unlike fuses, which must be replaced when they open, a circuit breaker can be reset once the overcurrent condition has been corrected.

A simple push of the handle to the “OFF” then back to the “ON” position restores the circuit. If a circuit reopens upon reset to the “ON” position, a qualified electrician should be consulted to determine the problem

Circuit Breaker Design

Circuit breakers are constructed from the following five major components:

  • Frame (Molded Case)
  • Cont acts
  • Arc Chute Assembly
  • Operating Mechanism
  • Trip Unit

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