一起220 kV氧化锌避雷器受潮分析

Vemp Analysis of 220 kV Zine Oxdie Arrester

瓷套型氧化锌避雷器(MOA)受潮是个频发的缺陷,针对某变电站220 kV 212-4氧化锌避雷器进行预防性试验发现的W相上节泄漏电流偏高的问题,通过解体检查和数据对比,认为该氧化锌避雷器存在受潮问题,对受潮原因进行分析,提出保障氧化锌避雷器安全运行的建议。

The dampness of porcelain clad zinc oxide arrester（moa） is a frequent defect. In view of the problem of high leakage current in the upper section of W phase found by preventive test of 220 kV 212-4 zinc oxide arrester at a certain station, the disassembly inspection and data comparison are carried out. It is considered that the zinc oxide arrester has the problem of moisture, the reason of the moisture is analyzed, and the suggestion to ensure the safe operation of the zinc oxide arrester is put forward.