Novel distribution cabinet arrester deterioration protection device

A technology for protection devices and power distribution cabinets, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., and can solve breakdown faults, slowness, increased leakage current, etc. problems, to achieve the effect of high operational reliability, perfect technical performance and reasonable principle

Inactive Publication Date: 2017-09-15
苏州基弘电气设备制造有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, as the surge arrester withstands the continuous accumulation of overvoltage shocks, its performance will gradually deteriorate, mainly manifested in the increase of leakage current
This process is relatively slow and has a certain degree of concealment. If it is not discovered in time, breakdown failure is very likely to occur

Method used

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  • Novel distribution cabinet arrester deterioration protection device

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Embodiment Construction

[0009] Such as figure 1 As shown, a new type of protection device for arrester degradation in power distribution cabinets includes arrester 1 and compensation impedance element 2, one end of arrester 1 is connected to compensation impedance element 2, compensation impedance element 2 is connected in parallel with resistance increasing switch 3, and compensation impedance element 2 After being connected in parallel with the resistance increasing switch 3 , it is connected in series with the control unit 4 , one end of the control unit 4 is connected with the current transformer 5 , and the other end of the power transformer 5 is connected with the compensating impedance element 2 .

[0010] The compensating impedance element 2 is a low voltage arrester.

[0011] The compensation impedance element 2 is made of zinc oxide valve plate.

[0012] It works as follows:

[0013] The compensating impedance element 2 and the resistance increasing switch 3 inside the degradation protect...

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Abstract

The invention discloses a novel distribution cabinet arrester deterioration protection device which comprises an arrester and a compensating impedance element. One end of the arrester is connected with the compensating impedance element. The compensating impedance element is connected in parallel with a resistance increasing switch. The compensating impedance element is connected in parallel with the resistance increasing switch, and then is connected in series with a control unit. One end of the control unit is connected with a current transformer. The other end of a power supply transformer is connected with the compensating impedance element. The novel distribution cabinet arrester deterioration protection device provided by the invention has the advantages of reasonable principle, high operation reliability and perfect technical performance, is adaptable to the characteristics of Chinese power grids, matches the mechanism of failure damage of the arrester, can be promoted, is built with a variety of communication protocols, and is suitable for a variety of communication environments.

Description

technical field [0001] The invention relates to the technical field of power protection, in particular to a novel protection device for arrester degradation of a power distribution cabinet. Background technique [0002] Zinc oxide arrester (hereinafter referred to as arrester) is a system overvoltage protection device commonly used in power grid operation. It plays a vital role in limiting the overvoltage generated by lightning, harmonics and operation in the system. However, as the surge arrester withstands the continuous accumulation of overvoltage shocks, its performance will gradually deteriorate, mainly manifested in the increase of leakage current. This process is relatively slow and has a certain degree of concealment. If it is not discovered in time, breakdown failure is very likely to occur. Contents of the invention [0003] In order to overcome the above problems, the present invention adopts the following technical solutions: [0004] A new type of arrester d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/041
Inventor 沈建李冬华杜林周超陈伟浩许宏新
Owner 苏州基弘电气设备制造有限公司
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