Lightning protection device

A lightning protection device and lightning arrester technology, which is applied in overvoltage arresters, electrical components, spark gaps, etc. that use spark gaps. It can solve the problems of burnt hardware, burnt wires, and long arc extinguishing time, and achieves good durability and low cost. Effects of Maintenance, High Reliability, and Lifetime

CN105427970AInactive Publication Date: 2016-03-23SHANGHAI MUNICIPAL ELECTRIC POWER CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-03-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a lightning protection device, which comprises an insulator and a lightning arrester body, wherein the insulator is used for supporting an overhead line; the lightning arrester body is arranged on the insulator; and after a voltage of the overhead line is higher than a threshold, an air gap is broken down, the lightning arrester body is conducted and overvoltage energy is released. The lightning arrester body comprises a base and an insulating pipe; the base sleeves the lower end of the insulator; one end of the insulating pipe is connected with the base; a plurality of chamber electrodes and a plurality of arc extinguishing chambers are sequentially arranged in the insulating pipe at intervals; and a blowhole is formed in the top end of each arc extinguishing chamber. According to the lightning protection device, an electric arc is blown off by a high-speed gas, so that a discharge arc caused by an overvoltage of the line is effectively cut off; the reliability and the safety of a power system transmission line are ensured; and meanwhile, the overvoltage of the line is indicated through an operation indicator.
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Description

technical field

[0001] The invention relates to the technical field of power facility components, in particular to a lightning protection device. Background technique

[0002] Installing surge arresters with series gaps on overhead distribution lines can effectively discharge overvoltage and protect insulator strings from burning by discharge arcs when the lines are struck by lightning or insulator strings flashover. Ordinary surge arresters with series gaps can effectively absorb the overvoltage on the line, break down the air gap, and guide the overvoltage to the ground. However, it does not have the ability to actively extinguish the arc, and cannot automatically extinguish the power-frequency freewheeling arc caused by the breakdown of the air gap. Only when it is used in conjunction with an automatic reclosing device can a better lightning protection effect be obtained. However, due to the need to wait for the circuit breaker to operate, it takes a long time to extingu...

Examples

Embodiment Construction

[0020] The present invention will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.

[0021] Such as figure 1 As shown, a lightning protection device includes: an insulator 1, which is used to hold an overhead line 2; an arrester body 3, which is arranged on the insulator 1; when the voltage of the overhead line 2 is higher than a threshold value, it breaks down the air gap and leads Through the arrester body 3, the overvoltage energy is released.

[0022] Such as figure 2 As shown, the above-mentioned arrester body 3 includes: a base 31, which is sleeved on the lower end of the insulator 1; an insulating tube 32, one end of which is connected to the base 32, and the insulating tube 32 is sequentially provided with several A chamber electrode 321 and a plurality of arc extinguishing chambers 322; corresponding to the top of each arc extinguishing chamber 322, a gas injection hole 323 is opened,...