Arc extinction slurry for fuse protector

Abstract

The invention relates to arc extinction slurry for a fuse protector. The arc extinction slurry comprises, by weight, 5-40 parts of gas production materials, 0-10 parts of phenol formaldehyde resin, 20-60 parts of quartz sand, 0.6-10 parts of organic solvents and15-30 parts of deionized water. The gas production materials are mainly urea-formaldehyde resin and other powder materials; the phenol formaldehyde resin can be boron-modified phenol formaldehyde resin and other high-temperature-resistant resin which is soluble in organic solvents, and the main effect of the phenol formaldehyde resin is to improve the heat-resistant performance of urea-formaldehyde resin; the periphery of a melt is covered with the arc extinction slurry in a filling mode or a thick film printing mode or the like, and gas will be produced under the action of an electric arc so as to extinguish the electric arc; fast cooling of the metallic melt is guaranteed by adding the quartz sand, and therefore the arc extinction slurry can be used on the breaking occasion of high voltage and great current of more than 250VAC / 100A. The arc extinction slurry has the predominant advantages of being low in production cost, easy to operate, free of halogen, friendly to environment, high in arc extinction ability and the like, thereby being suitable for being used in a current common tube shell type or thick film printing type surface-mounted miniature fuse protector.

Description

technical field

[0001] The invention relates to an arc extinguishing slurry for a surface-mounted miniature fuse with a breaking capacity of 250VAC / 100A or more, in particular to an arc extinguishing slurry with a gas-generating arc extinguishing material as a base, and a preparation method of the slurry. Background technique

[0002] The fuse is mainly composed of a melt and an insulator that supports or protects the melt. It uses a metal material or paste with a lower melting point to make a metal wire or a sheet electrode as a melt, which is connected in series in the protected circuit. When the circuit or When the equipment in the circuit is overloaded or fails, the melt is instantly fused due to heat, thereby cutting off the circuit and achieving the purpose of protecting the circuit or equipment. With the development of miniaturization of fuses, the breaking safety of fuses has gradually become an important factor to be considered in high-voltage and high-current appli...