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Insulator

A technology of insulators and insulating shells, applied in insulators, electrical components, spark gaps, etc., can solve the problems that insulators cannot cut off power frequency current in a timely and effective manner, transmission lines are tripped, etc.

Inactive Publication Date: 2015-09-30
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims to provide an insulator to solve the technical problem in the prior art that when the insulator is struck by lightning, it cannot timely and effectively cut off the freewheeling current of the power frequency, which causes the tripping of the transmission line

Method used

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Embodiment Construction

[0033] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0034] Such as figure 1 As shown, according to an embodiment of the present invention, a freewheel cut-off device 100 is applied to an insulator installed with a transmission wire in power transmission, and the freewheel cut-off device 100 includes an insulating housing 10, a conductive connector 20 and an air gap assembly 30. Two conductive connectors 20 are fixedly connected to both ends of the insulating housing, and the air gap assembly 30 is fixedly arranged inside the insulating housing 10, and the air gap assembly has at least one punctureable air gap; the two ends of the air gap assembly 30 They are respectively electrically connected to corresponding conductive connectors 20, and the air g...

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Abstract

The invention provides an insulator, which comprises a discharging part. The discharging part comprises a flow current cutoff device; the flow current cutoff device comprises an insulated shell, conductive connection pieces and an air gap assembly; the conductive connection pieces are fixedly arranged at two ends of the insulated shell; the air gap assembly is fixedly arranged in the insulated shell; two ends of the air gap assembly are respectively electrically connected with the corresponding conductive connection pieces; and the air gap assembly is provided with at least one air gap, and the air gap is insulated in a predetermined low voltage range and punctured in a predetermined high voltage range. The insulator also comprises a fixing connection part and a line mounting part, wherein the fixing connection part is used for fixedly mounting the insulator; and the discharging part is located between the fixing connection part and the line mounting part. The insulator of the invention can well replace an insulator in the prior power transmission line and a high voltage surge arrester additionally arranged specially, and the insulator has the advantages of strong flow current cutoff ability, large instant through current ability, light weight, small size and low cost.

Description

technical field [0001] The present invention relates to the technical field of power transmission, in particular to an insulator. Background technique [0002] In the prior art, the insulators used on transmission lines mainly support the transmission wires and prevent the current from returning to the ground. During thunderstorms in summer, insulators on transmission lines are often struck by lightning during operation. There are generally two situations where lightning strikes cause the breakdown of both ends of the insulator: one is due to lightning shielding, etc., and the lightning directly hits the transmission line, thereby causing the breakdown of the insulator between the transmission circuit and the transmission tower; One is that the lightning strikes the lightning protection line or the transmission tower, and the ground potential counterattacks when the lightning current leaks into the earth, resulting in the breakdown of the insulator from the tower to the tra...

Claims

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Application Information

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IPC IPC(8): H01B17/46H01T4/10
Inventor 叶宽张祎果周恺李春生杨国华龚玲王俊生
Owner STATE GRID CORP OF CHINA
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