How to detect overheating in circuit breakers?

The way circuit breakers detect overheating is very clever! It has a thermal element inside, like a small temperature sensor. When the temperature around the circuit breaker rises, this thermal element will sense it and send a signal to the control system of the circuit breaker.
After receiving this signal, the control system will determine whether the temperature has exceeded the set safety range. If exceeded, the control system will quickly respond, cutting off the flow of current to prevent potential hazards caused by overheating.
Imagine this thermistor being like a "thermometer" for a circuit breaker, constantly monitoring temperature changes to ensure the safe operation of the circuit system. It's really amazing! 🤩
So, circuit breakers can detect and respond to overheating phenomena in a timely manner, protecting our circuit system from damage. That's also why we can't live without it!