Drop fuse, also known as drop fuse, is a short-circuit protection switch commonly used in 10kV distribution line branch lines and distribution transformers.

The drop fuse is an over-current protection appliance, which can automatically fuse when the current exceeds the set value, thereby cutting off the circuit and protecting the electrical equipment from short-circuit current. The drop fuse has the function of an isolating switch, because it has an obvious disconnection point, which can create a safe working environment for the lines and equipment in the maintenance section.