熱式斷路器

The overload protection switch is bimetallic strip overload protector to prevent the main power line from being overheated and damaged due to overload. Also called a circuit breaker. Overload protection prevents overheating and fire by stopping the flow of excessive current from an overloaded circuit, while surge protection prevents damage to devices from sudden, high-voltage spikes. Overload protection devices, like circuit breakers and some power strips, trip to cut power and are resettable, whereas surge protectors divert or absorb excess voltage to the ground wire.