Anti-falling drop-out fuse

Abstract

The invention relates to the technical field of power distribution protection accessory devices, in particular to an anti-falling drop-out fuse, which ensures that a fuse tube reliably falls off afterbeing fused and does not fall off to the ground, so that the situation that equipment or electric power cannot be recovered in time due to the damage of the fuse tube is prevented, and the practicability is improved. The fuse comprises an insulator, an upper mounting rack, a lower mounting rack and the fuse tube. The upper mounting rack and the lower mounting rack are respectively mounted at thetop and the bottom of the insulator; an upper static contact and a lower static contact are respectively arranged on the upper mounting rack and the lower mounting rack; the top and the bottom of thefuse tube are respectively provided with an upper moving contact and a lower moving contact. An elastic spring and a fixed bolt are further included. The lower mounting rack is provided with an arc-shaped guide groove, the bottom of the arc-shaped guide groove is provided with a limiting protrusion, the lower moving contact is provided with a rotating shaft, the rotating shaft is rotatably arranged in the arc-shaped guide groove, the elastic spring is of a U-shaped structure, and the front side and the rear side of the left end of the elastic spring are provided with a front pressing piece anda rear pressing piece respectively.

Description

technical field [0001] The invention relates to the technical field of power distribution protection accessories, in particular to a fall-proof fuse. Background technique [0002] Drop-out fuse is the most commonly used short-circuit protection switch for branch lines of 10kV distribution lines and distribution transformers. It is economical, easy to operate, and adaptable to outdoor environments. It is widely used in 10kV distribution lines and power distribution The primary side of the transformer is used for protection and equipment switching and switching operations. The moving contacts at both ends of the fuse tube are fastened by the fuse (melt). After pushing the upper moving contact into the protruding part of the "duckbill", the phosphorus The upper static contact made of copper sheet is against the upper moving contact, so the fuse tube is firmly stuck in the "duckbill". When the short-circuit current passes through the fuse, an arc is generated, and the steel pap...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an anti-drop fuse, which ensures that the fuse tube will fall reliably after being fused without falling off and falling to the ground, thereby preventing the fuse tube from being damaged and failing to restore equipment or power in time. situation, improve practicality

Images