An anti-drop fuse

Abstract

The present invention relates to the technical field of power distribution protection accessories, in particular to an anti-drop fuse, which ensures that the fuse tube will fall reliably after being fused without falling off and falling to the ground, so as to prevent the fuse tube from being damaged and unable to be released in time. To restore the condition of the equipment or power, improve the practicability; including the insulator, the upper mounting frame, the lower mounting frame and the fuse tube, the upper mounting frame and the lower mounting frame are respectively installed on the top and bottom of the insulator, and the upper mounting frame and the lower mounting frame The upper static contact and the lower static contact are respectively provided, and the top and bottom of the fuse tube are respectively provided with an upper movable contact and a lower movable contact, including a spring leaf and a fixing bolt, and an arc-shaped guide is arranged on the lower mounting frame. The bottom of the arc-shaped guide groove is provided with a limit protrusion. The lower moving contact is equipped with a rotating shaft. The rotating shaft is rotatably set in the arc-shaped guide groove. The side and the rear side are respectively provided with a front pressing sheet and a rear pressing sheet.

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

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