Drop-out fuse for power construction

Abstract

The invention belongs to the field of fuses, and particularly relates to a drop-out fuse for power construction. The drop-out fuse comprises an insulator, a hook-type socket, a pin shaft A, an incomplete gear, a pin shaft B, a fuse tube, a memory alloy spring and the like, wherein the insulator is mounted on an electric pole through a mounting bracket, the hook-type socket is mounted at a wire outlet end at the lower end of the insulator, and the hook type socket is matched with a mounting plate. According to the invention, the range of fusing current can be judged according to the number of teeth, crossed by a sharp corner of the tail end of an inner rod of a telescopic rod, of the incomplete gear, so maintenance personnel can better take corresponding measures to maintain a circuit, andhigh safety is achieved.

Description

technical field [0001] The invention belongs to the field of fuses, in particular to a drop-out fuse for electric power construction. Background technique [0002] The moving contacts at both ends of the fuse tube of the traditional drop-out fuse are fastened by the fuse (melt), and the upper moving contact is pushed into the "duckbill" protrusion. After the drop-out fuse is divided, The upper static contact made of phosphor bronze 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 paper tube lined with the fuse tube generates a large amount of gas under the action of the arc. Because the upper end of the fuse tube is sealed, the gas is ejected from the lower end, blowing out the arc. Due to the blown fuse, the upper and lower moving contacts of the fuse tube lose the fastening force of the fuse, and under the action of the fuse tube's own g...

AI Technical Summary

Problems solved by technology

[0003] However, the traditional drop-out fuse cannot display the magnitude of the fusing current to inform the electrician of the circuit current situation, so that effective protective measures can be taken to better repair the circuit and improve the safety of circuit maintenance

[0004] In view of the problem that the traditional drop-out fuse cannot display the magnitude of the fusing current, it is necessary to improve the traditional drop-out fuse to solve the problem that the traditional drop-out fuse cannot display the magnitude of the fusing current

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