Surge arrester leakage current measurement sensor

A technology for measuring sensors and arresters, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problem that the leakage current of the arrester is difficult to measure accurately, and achieve the effect of protecting from being burned, ensuring normal use, and having a simple structure.

Active Publication Date: 2017-07-07
胡智宏 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention aims to solve the technical problem that it is difficult to accurately measure the leakage current of the arrester in the prior art

Method used

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  • Surge arrester leakage current measurement sensor
  • Surge arrester leakage current measurement sensor
  • Surge arrester leakage current measurement sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: A kind of surge arrester leakage current measurement sensor, such as figure 1 , image 3 As shown, it is used for the leakage current measurement of 10kV line arrester, including the upper aluminum electrode 2, the lower aluminum electrode 3, and the resistance sheet 6 arranged between the upper aluminum electrode 2 and the lower aluminum electrode 3, and the upper aluminum electrode 2 and the lower aluminum electrode The outer seal of the electrode 3 is sealed with an umbrella cover 1, which is a silicone rubber sealing body. The upper and lower ends of the umbrella cover 1 are respectively provided with an upper end cover 4 and a lower end cover 7; 1 The external detection positive electrode 5 (P+), the detection negative electrode 8 (P-) is drawn from the bottom of the lower aluminum electrode 3, the detection positive electrode 5 and the detection negative electrode 8 are made of stainless steel; the resistance sheet 6 consists of a sampling resistor R...

Embodiment 2

[0029] Embodiment 2: A sensor for measuring leakage current of an arrester. The difference from Embodiment 1 is that the residual voltage value of the protection valve Z2 is 100V under the nominal current of 8 / 20us, and the resistance value of the sampling resistor R is 50Ω.

Embodiment 3

[0030] Embodiment 3: A sensor for measuring the leakage current of a surge arrester, which is used for measuring the leakage current of a 110kV line arrester, its structure is the same as that of Embodiment 1, the difference is that the residual voltage value of the protection valve Z2 under the nominal current of 8 / 20us is 350V, and the resistance value of the sampling resistor R is 5Ω.

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Abstract

The invention discloses a sensor for measuring the leakage current of a lightning arrester, which aims to solve the technical problem that it is difficult to accurately measure the leakage current of a lightning arrester in the prior art. It includes an upper aluminum electrode, a lower aluminum electrode, and a resistance sheet arranged between the upper aluminum electrode and the lower aluminum electrode. In the upper aluminum electrode, there is a detection positive electrode P+ that leads to the outside of the umbrella cover, and at the bottom of the lower aluminum electrode. There is a detection negative electrode P‑; the resistance sheet is formed by connecting a sampling resistor R and a protection valve sheet Z2 in parallel. The invention is simple in structure and easy to install, realizes the live detection of the leakage current of the arrester, converts the small current measurement into a voltage measurement, and leads it to the measuring instrument through the electrode for subsequent measurement, without affecting the lightning protection effect of the arrester body. It solves the problems of strong electromagnetic interference and difficult signal extraction in the detection process of the arrester leakage current in the prior art.

Description

technical field [0001] The invention relates to the technical field of lightning arrester live monitoring, in particular to a lightning arrester leakage current measurement sensor. Background technique [0002] The phenomenon of lightning in the atmosphere will bring harm to human survival and social activities, and the protection of lightning has always been a concern of people. The arrester is an important protection component on the power line. When the power line is struck by lightning and overvoltage occurs at both ends of the arrester, the arrester changes from a high impedance state to a low impedance state, and quickly discharges the lightning strike current, thereby achieving the protection of the power equipment. When the arrester is in working state, the two ends continue to bear the working voltage, and the arrester presents high impedance at the rated working voltage. At this time, there will be a weak leakage current flowing through the arrester and entering th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/02G01R19/15
Inventor 胡智宏彭群娜廖旎焕
Owner 胡智宏
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