Drop Out Fuse/Cutout Switch

https://www.gdyfpower.com/products/drop-out-fuse-cutout-switch/

Drop out fuse switch refers to an electrical appliance that blows the melt and disconnects the circuit with the heat generated by itself when the current exceeds the specified value. The fuse is based on the current exceeding the specified value for a period of time, with its own generated heat to melt the melt, so that the circuit is disconnected; A current protector is made using this principle. Fuses are widely used in high and low-voltage distribution systems and control systems and electrical equipment, as a protector of short circuits and overcurrent, and are one of the most widely used protection devices.