Transparent drop-out fuse

Abstract

The invention discloses a transparent fuse. The fuse comprises an upper base plate, an insulator upper hardware fitting, an insulator, a mounting plate, an insulator lower hardware fitting, a lower base plate, a lower tension disc, a fusion tube lower copper cap, a fusion tube lower hardware fitting, a fusion tube, a fuse, a fusion tube upper hardware fitting, a pressure relief cap, a static contact plate, a spring and an upper tension disc, wherein the mounting plate is arranged in the middle of the insulator; a fusion tube outer sleeve is sleeved on the fusion tube, and the lower end of thefusion tube is sleeved and fixed in the fusion tube lower hardware fitting, and the upper end of the fusion tube is sleeved and fixed in the fusion tube upper hardware fitting with a hook. The transparent fuse is characterized in that a transparent umbrella is sleeved on the insulator; the transparent fusion tube outer sleeve is sleeved on the fusion tube; 0 to 4 slotted holes are arranged in themiddle section of the fusion tube; tungsten-copper is welded on the fusion tube upper copper cap; and tungsten-copper contacts are welded at the bottom of the pressure relief cap. The fuse can be used for quickly and visually detecting and determining whether the fuse is fused or not, so that the transparent fuse can be repaired in time to ensure safe operation of the transmission circuit. The fuse has low production cost, high standard degree, high product quality, high mechanical strength and long service lie, and can meet the requirement on high, medium and low voltage circuit fuses.

Description

technical field [0001] The invention belongs to the technical field of fuses and relates to a transparent drop-out fuse. Background technique [0002] The shell of the existing fuse or the fuse tube is made of ceramic material, which is sintered with clay, the process is not easy to control, the scrap rate is high, the quality is unstable, fragile, and it often cracks when performing the fuse characteristic test. Due to the constraints of sintering technology, mineral resources, environmental pollution and other factors, ceramic fuses are currently only produced by a few professional ceramic factories. The cost of fuse manufacturers is high, the process is complicated, the production cycle is long, and the supply is not available during peak production seasons. , is one of the bottlenecks restricting the development of fuses. [0003] In power maintenance, it is often encountered that the drop-out fuse is blown due to excessive current. Ideally, when the drop-out fuse is bl...

AI Technical Summary

Problems solved by technology

Since the upper moving contact of the fuse is made of copper, it is easy to deform, resulting in poor contact. In addition, the fuse tube is opaque, so it is difficult to judge whether it is damaged from the drop-out fuse, which causes troubles for maintenance personnel and wastes maintenance time.

[0009] To sum up, the insulator and fuse tube of existing fuses are made of ceramic materials, the process is difficult to control during sintering, the scrap rate is high, the quality is unstable, fragile, and often cracks when performing fuse characteristic tests

And because the upper moving contact is made of copper, it is easy to deform, resulting in poor contact. In addition, the melting tube is opaque, so it is difficult to judge whether the fuse is damaged, which causes troubles for maintenance personnel and wastes maintenance time.

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