How to discover the dangerous slight crack in early stage in labor pillarinsulator and porcelain cover, is a problem of the overhaul in step-up station and substation.
如何早期发现在役支柱绝缘子及瓷套中存在的危及安全运行的裂纹，一直是升压站和变电站检修的难题。
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The utility model provides an ultrasonic fault detection comparing test block for a high-voltage pillar porcelain insulator, consisting of a test block body and arc grooves.