Disc porcelain suspension insulator of electric porcelain is made up of quartz sand, clay, feldspar and other raw materials. the ball mill, pulp, mud, forming, porcelain glaze, and sintering, and the steel cap, high standard cement steel foot binding as cap type disc hanging porcelain insulator.Steel cap and steel feet under mechanical strain, porcelain mainly under pressure, the neck of the porcelain is thinner, and the electric field strength concentrated area.When the neck of the porcelain has defects such as micro pores, or there was a crack in the run, have the potential to porcelain breakdown, zero insulator, so this category of insulator for breakdown type insulator.
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