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Shield for T-shaped lightning arrester

A technology of shielding cover and arrester, which is applied in the direction of overvoltage protection resistors and varistors, etc., can solve the problems of partial discharge difference, poor shielding effect of shielding cover, and affect the uniformity of electric field of products, so as to reduce production costs and avoid partial Large discharge capacity, avoiding the effect of poor insulation performance

Inactive Publication Date: 2011-05-18
XIAN SHENDIAN ELECTRONICS
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a shielding cover for a T-shaped lightning 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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  • Shield for T-shaped lightning arrester
  • Shield for T-shaped lightning arrester

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Embodiment Construction

[0010] The present invention is described in detail below in conjunction with accompanying drawing:

[0011] 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 .

[0012] 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 shielding cover is close to one end of the lower electrode and the first contact surface after setting the socket. The vertical distance between the contact surfaces 101 is a, and the length of the resistance sheet group 11 is b, which should satisfy...

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Abstract

The invention provides a shield for a T-shaped lightning arrester, mainly solving the problem that the shields in the prior art have poor shielding effects, thus affecting the uniformity of 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 a T-shaped lightning arrester. Background technique [0002] The existing T-type plug-in arrester uses a composite jacket to vulcanize the core of the resistor sheet, and at the same time, the high-voltage inlet end of the vulcanized core extends outward to form a plug-in hole, which is used as the high-voltage inlet and installation of the arrester. , and then connect the arrester to the system that needs overvoltage protection for protection. After the high-voltage incoming line of the T-type plug-in arrester is introduced through the plug-in hole, it is connected to the high-voltage incoming line end of the resistor core inside the plug-in hole. Because the electric field here is uneven, the partial discharge of the arrester is large. , poor protection performance and short service life. At present, the method of installing a shielding cover...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/12
Inventor 叶德平杨筱安
Owner XIAN SHENDIAN ELECTRONICS
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