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Voltage-dependent resistor protection jacket of overvoltage protector

A varistor and protector technology, applied in the field of varistor protective sleeves, can solve the problems of being susceptible to corrosion and aging, and achieve the effects of reasonable configuration, extended service life, excellent corrosion resistance and aging resistance.

Inactive Publication Date: 2017-06-27
程望舒
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing varistor protective sleeves are susceptible to corrosion during use, especially in environments with high humidity and pH, and are prone to aging after long-term use. Therefore, it is possible to provide an excellent corrosion resistance The varistor protective cover with aging resistance is a technical problem that needs to be solved urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A varistor protective cover for an overvoltage protector, which is composed of the following raw materials in parts by weight: 50 parts of bisphenol A epoxy resin, 18 parts of high-density polyethylene resin, 4 parts of phenolic resin, and 2 parts of polytetrafluoroethylene powder 4.5 parts of sepiolite powder, 4 parts of basalt short fiber, 0.5 parts of fumed white carbon black, 2 parts of dicyandiamide dispersed latent curing agent, 0.8 parts of 2-methylimidazole, methacryloxypropyl trimethoxy 0.5 parts of base silane, 0.7 parts of lubricant, and 0.5 parts of hindered phenolic antioxidant.

[0017] The aforementioned lubricant is prepared by mixing polyethylene wax, magnesium stearate, and zinc stearate at a mass ratio of 1:4:2; the particle size of the aforementioned fumed white carbon black is 40-60 nm.

[0018] When preparing the varistor protective sleeve of the present invention, the polytetrafluoroethylene micropowder, sepiolite powder, basalt short fiber, and g...

Embodiment 2

[0020] A varistor protective cover for an overvoltage protector, which is composed of the following raw materials in parts by weight: 60 parts of novolac epoxy resin, 15 parts of high-density polyethylene resin, 2 parts of phenolic resin, and 3 parts of polytetrafluoroethylene micropowder , 4 parts of sepiolite powder, 5 parts of short basalt fiber, 0.3 part of fumed white carbon black, 2.5 parts of dicyandiamide dispersion latent curing agent, 0.8 part of N,N-dimethyl-N'-phenylurea, ampropyl 0.5 part of triethoxysilane, 1 part of lubricant, and 0.8 part of hindered phenolic antioxidant.

[0021] The aforementioned lubricant is prepared by mixing polyethylene wax, magnesium stearate, and zinc stearate at a mass ratio of 1:2:1; the particle size of the aforementioned fumed white carbon black is 50-70 nm.

Embodiment 3

[0023] A varistor protective cover for an overvoltage protector, which is composed of the following raw materials in parts by weight: 40 parts of epoxy resin, 20 parts of high-density polyethylene resin, 8 parts of phenolic resin, 1 part of polytetrafluoroethylene micropowder, sea foam 5 parts of stone powder, 3.5 parts of short basalt fiber, 0.6 part of fumed white carbon black, 1.5 parts of dicyandiamide dispersion latent curing agent, 0.5 part of 2-methylimidazole, 0.6 part of methacryloxypropyltrimethoxysilane , 0.5 parts of lubricant, 0.5 parts of hindered phenolic antioxidant.

[0024] The above epoxy resin is a mixture of bisphenol A type epoxy resin and bisphenol F type epoxy resin in a mass ratio of 1:1; the above lubricant is polyethylene wax, magnesium stearate, zinc stearate by 1 : Mixed with a mass ratio of 4:1; the particle size of the above-mentioned fumed silica is 60-80nm.

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Abstract

The invention provides a voltage-dependent resistor protection jacket of an overvoltage protector. The voltage-dependent resistor protection jacket is composed of, by weight, 40-60 parts of epoxy resin, 12-20 parts of high-density polyethylene resin, 2-8 parts of phenolic resin, 1-3 parts of polytef micropowder, 3-5 parts of sepiolite powder, 3-5 parts of basalt staple fiber, 0.3-0.6 part of fumed silica, 1.5-2.5 parts of curing agent, 0.5-1 part of promoter, 0.3-0.6 part of silane coupling agent, 0.5-1 part of lubricant and 0.2-0.8 part of antioxidant. The epoxy resin, the high-density polyethylene resin and the phenolic resin are selected as basic materials, the polytef micropowder, the sepiolite powder, the basalt staple fiber and the fumed silica are matched and added into raw materials, and the raw materials are synergistic, so that the voltage-dependent resistor protection jacket has excellent corrosion resistance and aging resistance and can safely and effectively protect a voltage-dependent resistor, and service life of the voltage-dependent resistor in the overvoltage protector is prolonged greatly.

Description

technical field [0001] The invention relates to the technical field of voltage protectors, in particular to a varistor protective cover of an overvoltage protector. Background technique [0002] Overvoltage protectors are mainly used to protect the insulation of electrical equipment such as generators, transformers, vacuum switches, busbars, and motors from overvoltage damage. In the prior art, a protective sheath is provided outside the varistor of the overvoltage protector to protect it, but the protective sheath is prone to wear and aging during long-term use, causing external acid and alkali components to enter and damage the voltage sensor. Sensitive resistance. The existing varistor protective cover has good insulation performance, can protect the varistor to a certain extent, and can prolong the service life of the varistor. However, the existing varistor protective sleeves are susceptible to corrosion during use, especially in environments with high humidity and pH...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L23/06C08L61/06C08L27/18C08K13/02C08K3/34C08K3/36C08K7/10C08K5/098
CPCC08L63/00C08K2201/003C08K2201/014C08L2203/20C08L2205/025C08L2205/035C08L2207/062C08L23/06C08L61/06C08L27/18C08K13/02C08K3/346C08K3/36C08K7/10C08K5/098
Inventor 程望舒
Owner 程望舒
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