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Shielding cover for lightning arrester test

A lightning arrester and test technology, which is applied in the field of intelligent substations, can solve problems such as the short distance between the lightning arrester and the surrounding objects, the abnormal sudden increase of the value, and the easily damaged lightning arrester, so as to solve the problem of cutting-edge discharge, improve protection, and extend the service life. Effect

Inactive Publication Date: 2014-07-16
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002]Due to the limitation of the area of ​​the substation busbar room, the distance between the 66kV and above surge arresters installed indoors and the surrounding objects does not meet the test voltage requirements, and it is generally not necessary to disassemble the arrester The DC test voltage of U1mA is 140kV. Due to the lack of distance, when the test voltage is increased to 90 kV, it is easy to produce abnormal sudden increase in value or discharge to objects.
If the arrester is disassembled and tested, although the test data is accurate, it is time-consuming and laborious, and it is easy to damage the arrester

Method used

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  • Shielding cover for lightning arrester test
  • Shielding cover for lightning arrester test

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Experimental program
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Embodiment

[0021] like figure 1 As shown, the material of the shielding cover is made of transformer enclosure insulating cardboard or transparent glass fiber reinforced plastics with high insulation performance. The cover body 1 is a double-layer structure, the top of the cover body 1 is a hollow hemisphere, the lower part of the cover body is a hollow cylinder, and the hollow cylinder The radius of the section is equal to the radius of the hollow hemisphere; the hollow cylinder is provided with a lead-out hole 2, and the distance between the lead-out hole 2 and the end of the arrester lead-out line 3 is 100 mm; the lead-out hole 2 is provided with a telescopic structure; the telescopic structure is, Four fan-shaped slides form a closed ring, and the four fan-shaped slides are slidably arranged in the wall of the hollow cylinder.

[0022] The size of the cover body is 450mm high, the inner circumference radius is 150mm, and the cover body wall thickness is 8mm.

[0023] In the test of ...

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PUM

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Abstract

The invention relates to a shielding cover for a lightning arrester test. The top of a cover body is in a hollow hemispherical shape. A hollow cylinder is arranged on the lower portion of the cover body, the radius of the cross section of the hollow cylinder is equal to the radius of the hollow hemispherical shape, and a leading-out hole is formed in the hollow cylinder. The shielding cover is used for improving electric field distribution and improving the breakdown voltage, the point discharge problem is solved, and test demands are met. When the lightning arrester test is carried out, the special shielding cover is placed at the head of a lightning arrester.

Description

technical field [0001] The invention relates to an auxiliary tool for testing electric equipment, in particular to a shielding cover for lightning arrester testing, and belongs to the technical field of intelligent substations. Background technique [0002] Due to the limitation of the area of ​​the substation busbar room, the distance between the 66kV and above surge arresters installed indoors and the surrounding objects cannot meet the test voltage requirements, and it is generally not necessary to disassemble the surge arresters U 1mA The current DC test voltage is 140kV. Due to the lack of distance, when the test voltage is increased to 90 kV, it is easy to produce abnormal sudden increase in value or discharge to objects. If the arrester is disassembled and tested, although the test data is accurate, it is time-consuming and laborious, and the arrester is easily damaged. Contents of the invention [0003] Aiming at the problems existing in the above-mentioned prior ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R1/18
Inventor 刘博王清昊石峰刘国斌白佳天张文广李智葛长鑫张华穆景龙史虓曹慧妍
Owner STATE GRID CORP OF CHINA
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