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DC cable test terminal

A DC cable and terminal technology, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of expensive DC cable terminals, inability to apply DC cables, and inability to use water terminals, etc., to reduce material costs and light weight , the effect of simple structure

Inactive Publication Date: 2016-01-20
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0002] At present, there are more and more applications of DC cables. AC cables can use water terminals as test terminals and reuse them, while DC cables cannot use water terminals because the electric field is related to conductivity, and the electric field distribution is complicated; therefore, most of the current DC cables are tested with DC cables. Cable terminations are tested, while DC cable terminations are expensive and cannot be reused
Technicians in related fields have also developed some DC cable test terminals, but their structures are complex and fixed capacitor voltage equalizers are used, so they cannot be applied to DC cables of different cross-sections and voltage levels.

Method used

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Embodiment Construction

[0027] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0028] The structure of the DC cable test terminal provided by the present invention is as follows: Figure 1-2 shown. The DC cable test terminal includes an insulating cylinder 3, a voltage equalizing cover coaxially installed at both ends of the insulating cylinder 3, and a DC cable 13 axially penetrating through the insulating cylinder 3; the DC cable 13 in the insulating cylinder 3 An inflatable semi-conductive pressure equalizing ring 4 and an inflatable stress cone 5 with a variable inner diameter are installed coaxially.

[0029] The insulating barrel 3 includes a hollow cylindrical epoxy sleeve and an insulating sheath covering the epoxy sleeve.

[0030] In order to reduce the weight of the insulating cylinder 3, facilitate the installation of the DC cable test terminal, improve ...

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Abstract

The invention provides a DC cable test terminal comprising an insulating cylinder, grading shields coaxially mounted at both ends of the insulating cylinder and a DC cable penetrating axially through the insulating cylinder. An inflatable semiconductor grading ring with a variable inner diamater and an inflatable stress core are mounted axially on the DC cable in the insulating cylinder. The branch cable test terminal provided by the invention is flexible and simple in structure, low in cost, long in service life and applicable to DC cables with different cross-sectional sizes and of different voltage levels.

Description

technical field [0001] The invention relates to a cable test terminal, in particular to a DC cable test terminal applicable to different cross-sectional sizes and different voltage levels. Background technique [0002] At present, there are more and more applications of DC cables. AC cables can use water terminals as test terminals and reuse them, while DC cables cannot use water terminals because the electric field is related to conductivity, and the electric field distribution is complicated; therefore, most of the current DC cables are tested with DC cables. The cable terminal is tested, and the DC cable terminal is expensive and cannot be reused. Technicians in related fields have also developed some DC cable test terminals, but their structures are complex, and fixed capacitive equalizing components are used, so they cannot be applied to DC cables of different cross-sections and different voltage levels. Contents of the invention [0003] In order to solve the above-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 陈铮铮赵健康蒙绍新欧阳本红
Owner CHINA ELECTRIC POWER RES INST
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