Drop-out fuse

Abstract

The invention discloses a drop-out fuse, which comprises a shell, an insulating body, a fuse tube, a fuse wire, a carrying cylinder and an alarm device, wherein the top part of the shell is in a roof-shaped structure which is high in middle part and low in two sides; the insulating body is vertically suspended in the shell; a metal cylinder is fixed at the upper part of the insulating body; a pair of elastic metal plates is obliquely fixed at the middle part of the insulating body; the metal cylinder and the elastic metal plates are connected to a working circuit; the fuse wire is fixedly connected with a metal post, passes through the fuse tube and then is fixedly connected with a metal ball; the metal ball receives resisting force, in opposite directions, of the pair of elastic metal plates; the fuse wire is in a stretched state; a spring sleeves the surface of the fuse tube and is in a compressed state to be propped against the metal post and the metal ball in the opposite directions; the carrying cylinder is located below the metal ball; an infrared sensor is arranged on the outer surface of the carrying cylinder; and the alarm device sends out an alarm after receiving an induction signal. According to the drop-out fuse, the fuse tube and the fuse wire can be sealed in the shell, so that the fuse wire, the fuse tube and metal elements are prevented from being disturbed by wind, rain, snow and heat; and the drop-out fuse can adapt to various severe environments.

Description

technical field [0001] The invention relates to the related field of power distribution equipment technology. More specifically, the present invention relates to a dropout fuse. Background technique [0002] A fuse is a device that fuses the fuse with the heat generated by itself and disconnects the circuit when the current exceeds the specified value. At present, the fuses used in domestic power distribution lines are mainly drop-out types, which are non-enclosed devices. This device has the advantage of a simple structure. However, since live parts such as dynamic and static contacts and connecting terminals are exposed, they are prone to corrosion and damage, and are prone to overlap discharge of foreign objects such as branches, iron wires, and small animals, especially in bad weather such as rainy and windy weather. Short circuit or grounding Accidents happen from time to time. In addition, the wind and rain will easily reduce the performance of the spring leaf, whi...

AI Technical Summary

Problems solved by technology

However, since live parts such as dynamic and static contacts and connecting terminals are exposed, they are prone to corrosion and damage, and are prone to overlap discharge of foreign objects such as branches, iron wires, and small animals, especially in bad weather such as rainy and windy weather. Short circuit or grounding Accidents happen from time to time

In addition, the wind and rain will easily reduce the performance of the spring leaf, which may cause the melting tube to automatically drop

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