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System and method for measuring contact resistance of elbow-shaped structure of cable terminal of power distribution switch cabinet

A technology of cable terminal and contact resistance, which is applied in the direction of grounding resistance measurement, measuring device, and measurement of electrical variables, etc. It can solve the problems of unable to measure and analyze the state of the head and elbow structure, abnormal heating, and increased contact resistance.

Pending Publication Date: 2021-12-03
SHENZHEN POWER SUPPLY BUREAU
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Problems solved by technology

During the operation of the switchgear, the proportion of heating defects is relatively high. The main reason is that the installation process control of the elbow structure of the cable terminal head is not good, and the contact resistance is increased due to looseness during operation, which leads to abnormal heating.
[0003] Since the elbow structure of the cable terminal head of the switchgear is encapsulated in the insulating sheath, it is impossible to directly measure the elbow structure to analyze the state

Method used

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  • System and method for measuring contact resistance of elbow-shaped structure of cable terminal of power distribution switch cabinet
  • System and method for measuring contact resistance of elbow-shaped structure of cable terminal of power distribution switch cabinet
  • System and method for measuring contact resistance of elbow-shaped structure of cable terminal of power distribution switch cabinet

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[0019] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application.

[0021] It will be appreciated that spatially relative terms such as "under", "beneath", "below", "under", "on", "above" etc., may be used herein to describe the relationship between one element or f...

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Abstract

The invention relates to a system and method for measuring the contact resistance of an elbow-shaped structure of a cable terminal of a power distribution switch cabinet. The system comprises a wiring device and a resistance tester, the wiring device touches a cable terminal head pressing gasket and is connected to a resistance tester measuring loop, and the other end of the resistance tester measuring loop is connected with a grounding bar of a switch cabinet; proper current and voltage are applied, and a total resistance value is obtained through measurement and is used for judging the contact state of the elbow-shaped structure, so that the installation process evaluation and defect diagnosis of the switch cabinet are realized.

Description

technical field [0001] The present application relates to the technical field of power grid equipment detection, and in particular to a contact resistance measurement system and method of an elbow structure of a cable terminal head of a power distribution switch cabinet. Background technique [0002] The main function of the switchgear is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. During the operation of the switchgear, the proportion of heating defects is relatively high. The important reason is that the installation process control of the elbow structure of the cable terminal head is not good and the contact resistance is increased due to looseness during operation, which leads to abnormal heating. [0003] Since the elbow structure of the cable terminal head of the switchgear is encapsulated in the insulating sheath, it is impossible to directly me...

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Application Information

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IPC IPC(8): G01R27/20
CPCG01R27/205
Inventor 罗红涛刘顺桂钟士朝罗致远尹爱国包淇天廖姗珊覃凯宁郑亚君赵启王政冯曜明陈士超邹林宏伍炜卫
Owner SHENZHEN POWER SUPPLY BUREAU
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