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