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Method of testing alternating current voltage resistance performance of multi-core cable

A multi-core cable, withstanding voltage technology, applied in the direction of testing dielectric strength, etc., can solve the problems of cumbersome, time-consuming and energy-consuming, cable damage, etc., to improve testing efficiency, reduce testing times, and ensure quality. Effect

Inactive Publication Date: 2014-02-05
HUAINAN XINGUANGSHEN OPTICAL FIBER CABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The cable withstand voltage test is to apply a higher test voltage to the cable, and then maintain it for a period of time before dropping to zero. In the cable product regulations, when the cable leaves the factory, it is necessary to communicate between the cable core and the core, and between the core and the shielding layer. Withstand voltage test, according to the above regulations, it is more cumbersome to test the withstand voltage performance of multi-core cables. In order to ensure that the cable core is completely tested, the traditional test method is to extract a core, and the core and all other cores are tested for withstand voltage performance. Test, and then test the next core after passing the test. For some control cables, the number of cores can generally reach 30 to 40 cores, so 29 to 39 tests are required for the cable, and the AC withstand voltage test time is 1 minute or 5 minutes. , and 30 minutes, most of the test time is 5 minutes, taking a cable with 30 cores as an example, the test time for a cable is about 150 minutes, which consumes a lot of time and energy, repeated measurements Also caused some damage to the cable

Method used

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  • Method of testing alternating current voltage resistance performance of multi-core cable
  • Method of testing alternating current voltage resistance performance of multi-core cable

Examples

Experimental program
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Embodiment 1

[0020] See attached figure 1 , a cable with cores arranged in (1+6+12+18+24), the cores are divided into 1, 2, 3, 4, 5 layers, and each layer is divided into 11, 12, 13, 14 , 15..., 21, 22, 23, 24, 25..., 31, 32, 33, 34, 35..., 41, 42, 43, 44, 45..., 51, 52, 53, 54, 55... and other wire cores , put all the wire cores together, conduct an AC withstand voltage test with the shielding layer, and take all the wire cores in the 1st, 3rd, and 5th layers of the withstand voltage test as a group, and all the wire cores in the 2nd and 4th layers as a group , the AC withstand voltage test is carried out between the two groups, so that each core and the upper and lower adjacent cores are tested for electrical resistance; the adjacent cores of the same layer are tested for electrical resistance, and the second layer 21, 23 , 25... wire cores constitute the first group of the second layer, 22, 24... wire cores constitute the second group of the second layer, and the third layer 31, 33, 35...

Embodiment 2

[0022] See attached figure 2 , a multi-core cable without shielding layer, the cores are arranged in (6+12+18+24+30+36), the cores are labeled in layers, and the cores are divided into 1, 2, 3, 4, 5 layers, divide each layer into 11, 12, 13, 14, 15..., 21, 22, 23, 24, 25..., 31, 32, 33, 34, 35..., 41, 42, 43, 44, 45 ..., 51, 52, 53, 54, 55... and other wire cores, since the wire cores have no shielding layer, the AC withstand voltage test of the wire cores can be carried out directly, and the odd-numbered layer cores are placed in one group, and the even-numbered The other group, carry out the AC withstand voltage test between the two groups; put the odd-numbered wire cores of each layer in one group, and the even-numbered wire cores in each layer in the other group, and conduct the AC withstand voltage test between the two groups Test to detect the insulation performance of multi-core cables and detect whether the cable insulation is defective.

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Abstract

The invention discloses a method of testing the alternating current voltage resistance performance of a multi-core cable. The method comprises the steps of an alternating current voltage resistance test between a wire and a shielding layer, layered numbering of cable cores of the multi-core cable, an alternating current voltage resistance test between cable core layers and an alternating current voltage resistance test between adjacent cable cores in the same layer, wherein all the steps are guaranteed through corresponding methods and measures. By means of the method, the insulating property of the multi-core cable can be detected quickly and effectively, whether cable insulation has defects also can be detected, the number of voltage resistance detection times is reduced, detection time is shortened, detection work efficiency is greatly improved, labor intensity is mitigated, and cable quality is guaranteed.

Description

Technical field: [0001] The invention relates to the field of cable production testing, more specifically to a method for testing the AC withstand voltage performance of a multi-core cable that can quickly and effectively detect whether the insulation of the multi-core cable is defective. Background technique: [0002] In the cable industry, the design of cable products generally takes into account the factors of rated voltage and overvoltage factors in the event of emergencies, such as short circuit, operation error, failure, etc. These voltages will greatly exceed the cable voltage. If these factors are not considered, the cable will be broken down, so it is necessary to carry out a withstand voltage test on the cable. The withstand voltage test can effectively test whether the overvoltage that the tested cable can withstand is within the specified Within the value, it avoids some safety conditions in the future working process of the cable. In order to verify the quality ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 牛红玲
Owner HUAINAN XINGUANGSHEN OPTICAL FIBER CABLE
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