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Shield for elbow type lightning arrester

A shielding cover and arrester technology, applied in the direction of overvoltage protection resistors, varistors, etc., can solve the problems of poor partial discharge, poor shielding effect, and shielding cover affecting the uniformity of the electric field of the product, so as to reduce production costs and avoid insulation. Poor performance, avoiding the effect of large partial discharge

Inactive Publication Date: 2011-05-18
XIAN SHENDIAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a shielding cover for an elbow arrester, which mainly solves the problems in the prior art that the shielding cover affects the uniformity of the electric field of the product, the shielding effect is poor, and the partial discharge is poor.

Method used

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  • Shield for elbow type lightning arrester
  • Shield for elbow type lightning arrester

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Embodiment Construction

[0008] The present invention is described in detail below in conjunction with accompanying drawing:

[0009] Such as figure 1 As shown: the plug-in arrester includes a core body 1, a terminal 3, an insulating jacket 4 and a shielding cover 5. One end of the core body 1 is connected to the terminal 3 and sealed in the insulating jacket 4. The core body 1 includes a resistor group 11 , an upper electrode 13 and a lower electrode 14 connected to both ends of the resistor group 11 . A shielding cover 5 is provided at the connection between the core body 1 and the terminal 3, one side of the shielding cover 5 is electrically connected to the terminal 3, and the other side is sleeved on the core body 1; the shielding cover 5 can be an organic composite shielding cover, a metal shielding Cover or conductive medium spray shielding cover, etc. Among them, both the organic composite shield and the metal shield have specific structures, and the conductive medium sprayed shield is a lay...

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Abstract

The invention provides a shield for an elbow type lightning arrester, mainly solving the problem that the shields in the prior art have poor shielding effects, thus affecting the uniformity of the electric fields of the products and further leading to poor partial discharge. One side of the shield is electrically connected with a terminal block and the other side of the shield is sleeved on a core, and the shield and the core are connected in a sealing manner. The shield is characterized in that the contact surface of an upper electrode and a resistance chip group is first contact surface; the contact surface of a lower electrode and the resistance chip group is second contact surface; and given the vertical distance between the end, which is close to the second contact surface, of the sleeved shield and the first contact surface is a and the length of the resistance chip group is b, a and b should satisfy the following condition: 1 / 3b>a>1 / 4b.

Description

technical field [0001] The invention relates to a shielding cover for a lightning arrester, in particular to a shielding cover for an elbow type lightning arrester. Background technique [0002] The existing shielding case has the following problems: the length of the shielding case has two forms, that is, the shielding case that is only sleeved on the upper electrode and the shielding case that is sleeved on half or more of the length of the core; the elbow type After the high-voltage incoming line of the plug-in arrester is introduced through the plug-in hole, it is connected to the high-voltage incoming line end of the resistor chip core inside the plug-in hole. Due to the uneven electric field here, the partial discharge of the arrester is large, and the protection Poor performance and short service life. When the shielding cover that is only socketed on the upper electrode is selected, the partial discharge difference of the shielding cover for the elbow arrester is us...

Claims

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Application Information

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IPC IPC(8): H01C7/12
Inventor 叶德平杨筱安
Owner XIAN SHENDIAN ELECTRONICS
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