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

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...

AI Technical Summary

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 disassembly and connection, it takes a lot of time A large amount of time increases the probability of damage to the test device, and personnel move the equipment in the live interval, focusing too much on the test and ignoring safety factors, so it also increases the unsafe factors of personnel

Images