Circuit Breakers: Circuit breakers are essential safety devices in electrical systems. These devices automatically interrupt the flow of current when there is a fault or overload in the circuit. The circuit breakers prevent overheating and fires by breaking the electrical circuit. Types of Circuit Breakers: There are various types of circuit breakers available. The most common types are overcurrent protection devices, which are used to protect electrical circuits from overloads. Another type is ground-fault circuit interrupters, which provide protection against electrical shock. Arc-fault circuit interrupters are also available to provide protection against arcing faults. Circuit Breaker Tripping: Circuit breakers can trip due to various reasons, such as overload, short circuit, or ground fault. When a circuit breaker trips, it interrupts the flow of current and shuts off the power to the circuit. Once the fault is cleared, the circuit breaker can be reset to resume the power supply. Size of Circuit Breakers: The size of circuit breakers varies according to the load of the electrical system. Electrical loads can be calculated by adding up the total current drawn by all the appliances and devices in the circuit. Circuit breakers are rated in amperes (A) and the rating should be chosen based on the maximum load the circuit is expected to handle. Maintenance of Circuit Breakers: Regular maintenance of circuit breakers is important to ensure their proper functioning. The circuit breakers should be inspected for any signs of wear and tear. The contacts should be checked for corrosion or pitting. The circuit breaker should be cleaned and lubricated at regular intervals. Conclusion: In conclusion, circuit breakers are essential safety devices in electrical systems. They protect the system from damage and ensure safety for the users. It is important to select the right size of circuit breakers and maintain them regularly to ensure their proper functioning.