Working principle of high speed fuse

High speed fuse is designed for circuits that need to be quickly disconnected from the current. Its working principle is that when the circuit is overloaded or short-circuited, the internal thermal fuse of the high speed fuse will rapidly increase in temperature. Eventually, the thermal fuse will burn out, causing the circuit to disconnect and protecting the circuit equipment from damage caused by excessive currents. Compared with ordinary fuses, high speed fuses can cut off the circuit more quickly in the event of a fault, thus ensuring circuit safety and avoiding dangerous situations such as fire or explosion caused by circuit failures.

 In addition, the short response time of high speed fuses can protect the circuit equipment more quickly in the event of circuit faults, avoiding damage caused by faults, and reducing maintenance costs and burdens. Therefore, in some occasions that require high circuit equipment safety, such as medical equipment, power equipment, highway streetlights, and traffic signal lights, high speed fuses are usually used to provide more reliable protection. Therefore, in its working process, its current characteristics are very important. Suitable high speed fuses should be selected according to the working current and overload current of the circuit.