Power Transformers Circuit Breakers are key features within the modern powerelectrical systems because they operate as a safety device that provides automatic cut off of electrical supply in circumstances of faults within the system. MCBs Miniature Circuit Breakers, MCCBs Molded Case Circuit Breakers, Air Circuit Breakers ACBs are the types of circuit breakers present in every system. All types of circuit breakers are developed for certain purposes and voltage applications. As an example MCBs could be used to protect low voltage circuits commonly in homes while MCCBs and ACB link Well with industries with high capacity requirements. Therefore knowing the different types of circuit breakers is an important factor in any electrical installation as it