A Circuit breaker controls electricity flow within the electrical circuit system, in order to protect the circuit from damage occurring from extra current resulting from an overload. There are different sizes of circuit breakers depending on its use. It is suitable for small circuits and large up to massive circuits. Circuit breakers help in increasing safety at the power plant, generation unit or factory where it is used to react to sudden changes of current and malfunctions, quicker than fuses and works under any form of electrical pressure as well.