Multi-point measuring device for live detection of metal-oxide lightning arrester

A live detection and multi-point measurement technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, can solve problems such as time-consuming, increase the probability of damage to the test device, and increase unsafe factors, so as to reduce wear and improve the market. Foreground and application value, the effect of ensuring security

Pending Publication Date: 2017-06-30
STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST +1
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Problems solved by technology

[0003] Whether it is through the voltage isolator method or the current isolator method, only one set of arrester data can be measured for each measurement, and then the same set of test equipment is transferred to the next group for re-disassembly and wiring. In the process of repeated disa

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  • Multi-point measuring device for live detection of metal-oxide lightning arrester
  • Multi-point measuring device for live detection of metal-oxide lightning arrester

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[0012] Such as figure 1 with 2 As shown, the present invention is used to measure the leakage current of the internal valve plate of the arrester in the operating state using the arrester leakage current tester in the operating state of the metal oxide arrester. It includes multiple sets of galvanic isolator wiring devices 2 and main test equipment. Each of the multiple galvanic isolator wiring devices 2 includes a set of lightning arrester three-phase leakage current meter wiring, current sampling clamp 3, galvanic isolator, and digital-to-analog conversion Module 5 and slave wireless data transmission module 6, the current sampling clamp 3 is used to short-circuit the leakage current meter, and connect the three-phase input terminal of the galvanic isolator through wiring, and the ground terminal of the galvanic isolator is connected to the ground; The output terminal is wirelessly connected to the main test equipment through the digital-to-analog conversion module 5 and the s...

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Abstract

The invention discloses a multi-point measuring device for live detection of a metal-oxide lightning arrester. The multi-point measuring device comprises multiple sets of current isolator wiring devices and a main test device. Each set of current isolator wiring devices consists of current sampling wire clamps of one group of lightning arrester three-phase leakage ampere meters, a digital-to-analog conversion module and a slave wireless data transmission module. The current sampling wire clamps are used for short circuit of leakage ampere meters. The main test device includes a main wireless data transmission module, a function arithmetic unit and a display terminal. According to the invention, the multiple sets of current isolator wiring devices are designed and each current isolator wiring device set corresponds to one lightning arrester group and has an own communication address, so that an anti-collision problem in wireless communication can be solved. The test host and a voltage isolator with a reference voltage are fixed beside a certain bus voltage transformer terminal box; and after the test worker completes current isolator wiring work of all lightning arrester groups at the earlier stage, testing can be carried out beside the test host.

Description

technical field [0001] The invention relates to the technical field of lightning arrester measurement, in particular to a multi-point measurement device for live detection of metal oxide lightning arresters. Background technique [0002] At present, the metal oxide arrester is one of the important protection devices to ensure the safe operation of the power system. It is mainly used to limit the overvoltage of the system. The leakage current is a very important reference index for evaluating the quality of the arrester. It is an effective measure to judge the state of the arrester in operation by periodically carrying out the test of the leakage current of the arrester under the operating state. At present, the surge arrester live detection device used by the test personnel generally adopts a wireless method, that is, the reference voltage or current data is transmitted wirelessly through a voltage isolator or a current isolator, and the measurement host uses the data receiv...

Claims

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Application Information

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IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 郭磊寇晓适张科丁国君董曼玲王天董丽洁王伟赵磊李予全郑含博邵颖彪王栋付海金蒲兵舰辛伟峰
Owner STATE GRID HENAN ELECTRIC POWER ELECTRIC POWER SCI RES INST
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