What is the function of a circuit breaker in an electrical system?

A circuit breaker serves a crucial protective role in an electrical system by preventing damage from overloads and short circuits. When the current flowing through a circuit exceeds a predetermined limit, the circuit breaker automatically interrupts the flow of electricity. This action helps prevent overheating of wires, potential fire hazards, and damage to connected devices and appliances.

Unlike devices that increase voltage or maintain constant current flow, the primary function of a circuit breaker is to safeguard the system from conditions that could lead to failure or unsafe situations. Therefore, its design is specifically focused on circuit protection, making it an essential component in maintaining safe and reliable operations in HVACR and other electrical systems.