What Are The Types Of Drop-out Fuses?

The open type drop out fuse 33kv has a simple structure, the melt is completely exposed to the air, supported by a porcelain column, without a support, and is suitable for low-voltage outdoor use. When breaking the current, it produces a large sound and light in the atmosphere.
The semi-enclosed type drop out fuse cut out has a melt installed on a porcelain rack and inserted into a porcelain box with metal sockets at both ends, which is suitable for low-voltage indoor use. When breaking the current, the sound and light generated are blocked by the porcelain box.
The tubular type drop out fuse element has a melt installed in the fuse. Then it is inserted into the support or directly connected to the circuit for use. The fuse is a completely sealed insulating tube with metal caps or contacts at both ends. If this drop out fuse in transformer insulating tube is filled with quartz sand, it has a current limiting effect when breaking the current, which can greatly improve the breaking capacity, so it is also called high breaking capacity drop out fuse price. If the tube is evacuated, it is called vacuum drop out fuse set. If the tube is filled with SF6 gas, it is called SF6drop out fuse unit, the purpose of which is to improve the arc extinguishing performance. Since quartz sand, vacuum and SF6 gas all have good insulation properties, this type of drop out type fuse is suitable not only for low pressure but also for high pressure.