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Direct plug-in type shielding cover for plug-and-play arrestor

A technology of pluggable and shielding covers, which is applied in the field of shielding covers for lightning arresters. It can solve the problems of poor shielding effect of shielding covers, affecting the uniformity of electric field of products, and poor partial discharge, so as to avoid large partial discharge and poor insulation performance. , the effect of reducing production costs

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

[0006] The invention provides a shielding cover for an in-line plug-in arrester, which mainly solves the problem of poor shielding effect of the shielding cover in the prior art, which affects the uniformity of the electric field of the product and causes poor partial discharge.

Method used

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  • Direct plug-in type shielding cover for plug-and-play arrestor

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Embodiment Construction

[0013] The present invention is described in detail below in conjunction with accompanying drawing:

[0014] Such as figure 1 As shown: the plug-in arrester includes a core body 1, a connection terminal 3, an insulating jacket 4 and a metal shield 5, and one end of the core body 1 is connected to the connection terminal 3 and sealed in the insulation 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 metal shield 5 is provided at the joint between the core body 1 and the connection terminal 3 , one side of the metal shield 5 is electrically connected to the connection terminal 3 , and the other side is sleeved on the core body 1 . The contact surface between the upper electrode 13 and the resistance sheet group 11 is the first contact surface 101, the contact surface between the lower electrode 14 and the resistance sheet group 11 is the second contact surface 102, and the...

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Abstract

The invention provides a direct plug-in type shielding cover for a plug-and-play arrestor. The direct plug-in type shielding cover for the plug-and-play arrestor directly solves the problem of low insulating property of the conventional shielding cover, reduces the production cost of the shielding cover, saves resources, avoids large partial discharge capacity of the plug-and-play arrestor caused by that the shielding cover is too short or too long, improves the protection on the product and prolongs the service life of the product. In the direct plug-in type shielding cover for the plug-and-play arrestor, a metal shielding cover is in sealing connection with a core body; a contact surface of an upper electrode and a resistor group is the first contact surface; a contact surface of a lower electrode and the resistor group is the second contact surface; the vertical distance between one end, near the lower electrode, of the shielding cover after sleeving connection and the first contact surface is a; the length of the resistor group is b; and a is more than 1 / 4b and less than 2 / 5b.

Description

technical field [0001] The invention relates to a shielding cover for a lightning arrester, in particular to a shielding cover for a plug-in type lightning arrester. Background technique [0002] Existing plug-in surge arresters are mainly divided into organic composite jacket gapless oxide surge arresters and composite jacket gapless zinc oxide surge arresters with separation devices. [0003] The oxide surge arrester with organic composite jacket without gaps is assembled with zinc oxide non-linear resistors with strong flow capacity, and is sealed in the jacket cavity without any discharge gap. In the normal continuous operating voltage state, the arrester does not act and is in a high-impedance state. When the amplitude of the atmospheric overvoltage or the operating overvoltage exceeds a certain range, the arrester is turned on. Due to the excellent nonlinear volt-ampere characteristics of the zinc oxide resistor, the residual voltage at both ends of the resistor is s...

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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