Circuit breakers are electrical safety devices that are used to protect electrical circuits from overloading and short-circuits. They work by automatically interrupting the flow of electrical current in the event of an overload or short-circuit. This helps to prevent damage to electrical equipment, minimize the risk of electrical fires, and protect people from electric shock. There are several types of circuit breakers, including: Thermal-magnetic circuit breakers, molded case circuit breakers (MCCB), miniature circuit breakers (MCBs), and ground fault circuit interrupters (GFCIs).