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Detecting method for short dot position of cable

A detection method and short-circuit point technology, applied in the direction of fault location, etc., can solve the problems of complex test process and high test requirements, and achieve the effect of simple test principle and simple operation

Inactive Publication Date: 2013-03-13
陕西海泰电子有限责任公司
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problems of high testing requirements and complicated testing process of existing cable fault point detection methods, the present invention provides a convenient and easy-to-operate cable short-circuit point position detection method for testing the cable short-circuit fault position

Method used

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  • Detecting method for short dot position of cable
  • Detecting method for short dot position of cable
  • Detecting method for short dot position of cable

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Embodiment Construction

[0017] Such as figure 1 As shown, a cable breakpoint position detection method, assuming that the wire ab and the wire cd are selected as two uniform wires of equal length and equal spacing in the cable,

[0018] The detection steps of cable short-circuit point are as follows:

[0019] a) Connect the two test leads of the resistance testing instrument or equipment to the figure 1 The end point a and end point c shown, the measured wire resistance Rac=R1+R2;

[0020] b) Connect the two test leads of the resistance testing instrument or equipment to the figure 1 The end point a and end point b shown, the measured wire resistance Rab=R1+R3;

[0021] c) Connect the two test leads of the resistance testing instrument or equipment to the figure 1 The end point c and end point d shown, the measured wire resistance Rcd=R2+R4;

[0022] d) Calculate the relative distance X between the short-circuit point and point c according to formula (1).

[0023] X = ...

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Abstract

The invention relates to a detecting method for a short dot position of a cable. The detecting method includes the following steps that (1) two even leads equal in length and interval are selected in the cable; (2) two testing meter pens of a resistance testing instrument or device are connected with an endpoint a and an endpoint c of the lead ab and the lead cd respectively to obtain resistance Rac; (3) the two testing meter pens of the resistance testing instrument or device are connected with the endpoint a and an endpoint b of the lead ab respectively to obtain resistance Rab; and (4) the two testing meter pens of the resistance testing instrument or device are connected with the endpoint c and an endpoint d of the lead cd to obtain resistance Rcd and the like. By means of the method, the technical problem that the existing cable fault point detecting method is high in testing requirements and complex in a testing process is solved. The detecting method has the advantages of being convenient, easy to operate and the like.

Description

technical field [0001] The invention relates to a method for detecting the position of a cable short-circuit point. Background technique [0002] Existing cable testing methods generally test the on-resistance of each core wire of the cable, the insulation resistance between the core wires, and the withstand voltage. [0003] The common fault location testing method is the pulse reflection method, which mainly uses the reflection of the pulse wave caused by the impedance change of the cable at the fault location to locate the fault. The pulse reflection method uses the transmission speed and transmission time of the pulse wave in the cable (that is, the time difference between the reflected pulse wave and the incident pulse wave) to calculate the location of the fault point in the cable. The operation of the pulse reflection method is complicated, and a special pulse signal generator and pulse wave testing equipment are required. At the same time, the operator is required t...

Claims

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Application Information

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IPC IPC(8): G01R31/08
Inventor 郭恩全高宝平宁成军杨朋白晓峰郭永锋
Owner 陕西海泰电子有限责任公司
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