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Locating Method of Low-resistance Fault Point of Cable Laying on Bridge Frame

A technology of laying cables and positioning methods, applied in the direction of fault location, etc., can solve the problems of high cost and no way to use existing equipment to locate and detect fault points, and achieve the effect of simple steps, easy application and promotion, and avoiding high cost

Active Publication Date: 2017-09-29
JINAN YUXING CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Checking relevant information and consulting professional companies, there is no way to use existing instruments to locate and detect fault points, only to replace cables, which costs a lot

Method used

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  • Locating Method of Low-resistance Fault Point of Cable Laying on Bridge Frame
  • Locating Method of Low-resistance Fault Point of Cable Laying on Bridge Frame
  • Locating Method of Low-resistance Fault Point of Cable Laying on Bridge Frame

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] The low-resistance fault point location method of the bridge laying cable of the present invention is realized by the following steps:

[0020] a). To determine the nature of the cable fault, after suspending each core wire in the cable, use a megger to measure the resistance value of the cable core wire relative to the cable bridge. If it is in a high resistance state, it indicates that the cable core wire has good insulation. There is no fault; if the core wire of the cable under test has a low resistance value, it indicates that the core wire of the cable has a low resistance fault, and step b) is performed;

[0021] b). Measure the low resistance value, select one end of the faulty cable core wire as the measuring end, and use a multimeter to measure the resistance value between the faulty cable core wire and the cable tray;

[0022] c). Mea...

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Abstract

The method for locating the low-resistance fault point of the bridge laying cable of the present invention includes: a). Judging the nature of the cable fault and performing step b) if there is a low-resistance fault; b). Measuring the magnitude of the low-resistance value; c). Accurate measurement Resistance value; d). Rough positioning of the cable fault point, one end of the indicating circuit is fixed on the front bridge, and the other end moves on the rear bridge. When the light-emitting diode is in the brightest state, the position of the indicating circuit on the rear bridge is is the fault point of the faulty cable core. The method for locating the cable low-resistance fault point of the present invention has simple and reasonable steps and is convenient for actual operation. During the implementation process, the normal operation of other cables on the cable bridge is not affected, and the replacement of the entire cable is avoided if the fault point cannot be found in the past. The disadvantage of the high cost is brought, the beneficial effect is remarkable, and it is convenient for application and promotion.

Description

technical field [0001] The invention relates to a method for locating a low-resistance fault point of a bridge-laying cable, and more specifically, to a method for locating a low-resistance fault point of a bridge-laying cable by using a cable break to gradually drop voltage along both sides of the bridge. Background technique [0002] In industrial production plants, power cables are generally laid in a concentrated manner using bridges. During the laying of the cable on the metal bridge, it is easy to damage the insulation layer of the cable. Under the joint action of noise, vibration, moist water vapor and corrosive gas at the industrial production site, cables with damaged insulation layers are prone to ultra-low resistance faults between single-phase or two-phase and the bridge. Without affecting the normal operation of other equipment, it is impossible to accurately locate the fault point of non-armored rubber and plastic low-voltage cables by using traditional low-vo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
Inventor 安济怀
Owner JINAN YUXING CHEM
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