In this article, you'll learn what a circuit breaker is, why they're important, and how to identify them. You'll also get an understanding of the different types and their strengths.

What is a Circuit Breaker?

A circuit breaker is a device that interrupts the flow of electricity in a circuit in order to prevent damage from an overload or short circuit.

An electrical circuit breaker is a switching device which can be operated manually and automatically for controlling and protecting an electrical power system. As the modern power system deals with huge currents, special attention should be given during designing of a circuit breaker to ensure it is able to safely interrupt the arc produced during the closing of a circuit breaker. This was the basic definition of circuit breaker.

Introduction to Circuit Breaker

The modern power system deals with huge power network and huge numbers of associated electrical equipment. During a short circuit fault or any other type of electrical fault (such as electric cable faults), a high fault current will flow through this equipment as well as the power network itself. This high current may damage the equipment and networks permanently.