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Lightning-protection broken-line medium-voltage insulation lead

A technology of insulated wires and lightning protection, applied in the direction of insulated conductors, insulated cables, conductors, etc., can solve problems such as unsatisfactory effects and broken wires

Inactive Publication Date: 2018-06-12
苏永义
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current method used is to install zinc oxide arresters, discharge intervals, lightning arrestors or coupled ground wires on the medium-voltage insulated conductors to prevent medium-voltage insulated conductors from being broken due to overvoltage in the atmosphere. These measures are passive and have little effect. Ideal, but frequent disconnection accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] A medium-voltage insulated wire for lightning strike protection, characterized in that it includes a steel core composed of multiple steel wires, the steel core is covered with an aluminum conductor layer, and the surface of the aluminum conductor layer is coated with aluminum chloride or ammonium chloride. The aluminum conductor is coated with a conductor shielding layer, an ethylene-propylene rubber insulating layer, and an insulating shielding layer in turn. The above-mentioned three aluminum conductors form a group, and a low-smoke, halogen-free, flame-retardant tape wrapping layer is provided outside the insulating shielding layer. , the low-smoke halogen-free flame-retardant tape is provided with an isolation layer around the cladding, and the isolation layer is jointly covered with a polyvinyl chloride insulating layer, and the polyvinyl chloride insulating layer is covered with a sheath; The sheath is prepared according to the following process:

[0012] 100 par...

Embodiment 2

[0014] A medium-voltage insulated wire for lightning strike protection, characterized in that it includes a steel core composed of multiple steel wires, the steel core is covered with an aluminum conductor layer, and the surface of the aluminum conductor layer is coated with aluminum chloride or ammonium chloride. The aluminum conductor is coated with a conductor shielding layer, an ethylene-propylene rubber insulating layer, and an insulating shielding layer in turn. The above-mentioned three aluminum conductors form a group, and a low-smoke, halogen-free, flame-retardant tape wrapping layer is provided outside the insulating shielding layer. , the low-smoke halogen-free flame-retardant tape is provided with an isolation layer around the cladding, and the isolation layer is jointly covered with a polyvinyl chloride insulating layer, and the polyvinyl chloride insulating layer is covered with a sheath; The sheath is prepared according to the following process:

[0015] 200 par...

Embodiment 3

[0017] A medium-voltage insulated wire for lightning strike protection, characterized in that it includes a steel core composed of multiple steel wires, the steel core is covered with an aluminum conductor layer, and the surface of the aluminum conductor layer is coated with aluminum chloride or ammonium chloride. The aluminum conductor is coated with a conductor shielding layer, an ethylene-propylene rubber insulating layer, and an insulating shielding layer in turn. The above-mentioned three aluminum conductors form a group, and a low-smoke, halogen-free, flame-retardant tape wrapping layer is provided outside the insulating shielding layer. , the low-smoke halogen-free flame-retardant tape is provided with an isolation layer around the cladding, and the isolation layer is jointly covered with a polyvinyl chloride insulating layer, and the polyvinyl chloride insulating layer is covered with a sheath; The sheath is prepared according to the following process:

[0018] 1050 pa...

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Abstract

The invention belongs to the electric power material field and provides a lightning-protection broken-line medium-voltage insulation lead. The lead is characterized in that the lead comprises a steelcore formed by a plurality of steel wires; an aluminum conductor layer wraps the steel core; a conductor shielding layer, an ethylene propylene rubber insulation layer, and an insulation shielding layer successively wrap aluminum conductors; each three aluminum conductors form one group; a flame-retardant band wrapping layer is arranged outside the insulation shielding layer; a separating layer isarranged outside the flame-retardant band wrapping layer; a polyvinyl chloride insulation layer wraps the separating layer; and a sheath wraps the polyvinyl chloride insulation layer. The structure is reasonable and performance is good.

Description

technical field [0001] The invention belongs to the field of electric power materials, and in particular relates to a medium-voltage insulated wire for preventing wire breakage caused by lightning strikes. Background technique [0002] The wide application of medium-voltage insulated wires in power systems is mainly determined by its advantages. It can well solve the contradiction between trees and wires, especially the big problem of urban landscape greening, power line passages and safe operation of power lines. However, it also has a fatal weakness. When the power line is discharged by atmospheric overvoltage (lightning strike), it will be disconnected. After the disconnection, it will seriously affect the stable operation of the power system. The bigger problem is to affect the lives and property safety of the surrounding people. This again limits his application prospects. His disconnection mechanism is as follows: When the medium-voltage insulated wire line is subject...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/17H01B7/18H01B7/29H01B7/295H01B7/42
CPCH01B9/02H01B7/17H01B7/18H01B7/29H01B7/295H01B7/421
Inventor 贾瑞亮乔晓东苏永义王东旭
Owner 苏永义