Cable detection method
A detection method and cable technology, which is applied in the field of power cables, can solve problems such as the cumbersome detection process of power cables, and achieve the effect of high processing efficiency
Active Publication Date: 2020-11-24
SGIS SONGSHAN CO LTD
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Problems solved by technology
[0005] The purpose of this application is to provide a cable detection method, which can improve the cumbersome problem of the existing power cable detection process
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[0047] The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
[0048]Before the power cable is formally connected to the power grid, it is necessary to carry out inspections such as cable confirmation, phase sequence verification, and insulation defect inspection. Normally, when detecting insulation defects, the insulation resistance between the cable core and the shielding layer, and the insulation resistance between the inner core and the core of the cable are tested to detect whether there is an insulation defect in the cable. The commonly used detection idea is to separate the phase sequence discrimination process of the cable from the insulation defect detection process for independent detection.
[0049] An existing detection idea is: when judging the phase sequence of a cable, one end of a three-phase cable is grounded with a certain phase core wire, and...
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The embodiment of the invention provides a cable detection method. The method comprises three stages: a first stage, a second stage and a third stage. In the first stage, cable confirmation is carriedout and comprises the step of determining a current to-be-detected cable from at least one to-be-detected cable. In the second stage: three-phase phase sequence checking and insulation resistance detection are carried out on the current to-be-detected cable; wherein after the current cable completes phase sequence checking and insulation resistance detection, a next to-be-detected cable unit in the at least one to-be-detected cable is subjected to cable confirmation, so that a new cable unit is determined from the at least one to-be-detected cable as the current to-be-detected cable, and thenthree-phase phase sequence checking and insulation resistance detection are carried out based on the new cable unit. And after all the cable units in the at least one to-be-tested cable are subjectedto three-phase phase sequence checking and insulation resistance detection, the third stage is carried out: carrying out voltage withstanding test on all the cable units in the at least one to-be-tested cable. Therefore, cable detection can be completed rapidly, simply and conveniently.
Description
technical field [0001] The present application relates to the technical field of power cables, and in particular, to a cable detection method. Background technique [0002] Power cables are cables used to transmit and distribute electrical energy. Power cables are often used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. The basic structure of a power cable includes a core, an insulating layer, a shielding layer and a protective layer. [0003] When there is a cable head failure in the running power cable, when the new and old cables are connected, or when the new power cable is installed, it is necessary to re-make the cable terminal head or the cable middle head for the cable. After the cable terminal head and the cable intermediate head are manufactured, the cable needs to be inspected before the cable is formally connected to the po...
Claims
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IPC IPC(8): G01R31/60G01R29/18G01R31/12G01R27/02
CPCG01R31/60G01R29/18G01R31/1272G01R27/025
Inventor 钟韶黄文星甘光耀成霞吴东文杨师荣罗淑辉张淑萍陈海燕陈旺娟
Owner SGIS SONGSHAN CO LTD