The answer to 'how does circuit breaker work' is that a circuit breaker is a safety device that automatically interrupts the flow of electrical current in a circuit when it detects a problem, like a short circuit or overload. This protects the electrical system and prevents damage or fire. When too much current flows through the circuit, the breaker detects the excess and trips, or opens the circuit, to stop the flow of electricity. This cuts off power to that part of the electrical system until the problem is fixed and the breaker is reset.
Circuit breakers contain a switch and a mechanism that senses the electrical current. When the current exceeds a safe level, the mechanism trips the switch and opens the circuit. This disconnects the power and stops the flow of electricity, preventing damage to the wiring, appliances, or other connected devices. Once the problem is resolved, the breaker can be reset to restore power to the circuit.