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Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below

A cross-linked cable and withstand voltage test technology, which is applied in the direction of testing dielectric strength, can solve problems such as high price, poor control, and complex structure, and achieve the effects of convenient operation, improved production efficiency, and low cost

Inactive Publication Date: 2012-05-02
广东电网有限责任公司广州供电局输电管理一所 +1
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although the deionized water terminal can withstand a voltage of 160kV, its disadvantage is that the structure is complex, the price is expensive, and it needs to be used in conjunction with the corresponding water processor
The parameters temperature, flow rate, and conductivity in the water processor, if one of them is not well controlled, may cause breakdown damage to the deionized water terminal

Method used

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  • Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below
  • Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below
  • Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below

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specific Embodiment approach

[0016] A specific embodiment of the present invention is as follows: the oil cup 1 is placed upright, first peel off a part of the cable insulation shielding layer 33 at one end of the test cable 3, and penetrate through the bottom round hole 4 of the test terminal to make the cable core 31 1. The upper end of the cable insulation layer 32 extends out of the oil cup 1, the upper end of the cable insulation shielding layer 33 is located in the oil cup 1, and is heated and sealed with the heat-shrinkable tube 16 that has been inserted into the test cable 3 in advance, and then the put Oil port 15 valve is closed tightly, pours into the liquid 2 that is the mixture of insulating oil and tap water, due to the reason of density, this mixture is divided into upper and lower two layers, and the upper layer is insulating oil 22, and the lower layer is tap water 21. Among them, the upper surface of the tap water 21 needs to be higher than the highest point of the cable insulation shield...

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Abstract

The invention relates to a withstand voltage test terminal structure of a cross-linked cable under 110kV voltage class or below. The cross-linked cable withstand voltage test terminal structure comprises a testing cable and an oil cup containing liquid. A center of the oil cup is provided with a penetrating circular hole. The testing cable goes through the circular hole. The oil cup is vertically placed. The liquid in the oil cup is a mixture of insulating oil and tap water. When the oil cup is vertically placed, a lower layer of the liquid is the tap water, an upper layer of the liquid is the insulating oil, and an upper surface of the tap water is higher than a highest point of a cable insulation shielding layer. The structure can bear an electric field formed by 200kV voltage, cost is low, operation is convenient, production efficiency is raised, the liquid in the oil cup can be used repeatedly, and frequent replacement of the liquid is not needed.

Description

technical field [0001] The invention relates to a cross-linked cable withstand voltage test terminal structure, in particular to a cross-linked cable withstand voltage test terminal structure with a voltage level of 110kV and below. Background technique [0002] 35kV ~ 110kV cables are the main products in my country's power cable products. From the perspective of structural materials, there are basically two categories: cross-linked cables and oil-filled cables. Due to the characteristics of easy processing and convenient maintenance of cross-linked cables, cross-linked cables have basically replaced oil-filled cables at present. In order to ensure product quality, there are provisions in the product standards to carry out the corresponding AC voltage project testing. For 35kV cross-linked cables, due to the limitation of the test terminal, the test voltage can only be added to 65kV under normal circumstances. According to the national standard, the 35kV cable withstand vo...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 吴倩范玉军贺智涛刘毅刚杨立志黄嘉盛卞佳音李文炜李骥朱永华贺伟吴长顺
Owner 广东电网有限责任公司广州供电局输电管理一所
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