Porcelain covers for different purposes

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In total range of insulators delivered by SZVI the hollow apparatus porcelains are the most principal items designed for production of low-oil, SF6 and air breakers, current transformers,

high voltage bush-ings and arrestors. The enterprise manufactures cylindrical and conical apparatus porcelain up to 5525 mm high. Cov-ers of up to 2000 mm high are made of a solid piece. Large-size insulators are made from separate parts fixed together with the epoxy, their joints withstanding maximum bending moment up to 235 kg/cm2.

Type of insulator Denotation of draft ГОСТ, ТУ  Nominal system voltage, kV Creepage distance, no less than, cm Н, mm D External, mm Weight, kg Sketch
Nominal rejection ±10%
П 250/210 УХЛ2 НИЮД.757524.019 ГОСТ 5862-79 -- -- 250 290 13,8 1,38
П 330/55 О НИЮД.701 МЭК 62155:2003 15 44 330 118 3,30 0,33
П 470/180 ИНЯЖ.757524.003 ГОСТ 5862-79 35 70 470 330 32,0 3,2
П 540/55 О НИЮД.702 МЭК 62155:2003 30 95 540 124 5,50 0,55
П 645/55 О НИЮД.700 МЭК 62155:2003 36 95 645 109 5,30 0,53
П 645/80 О НИЮД.703 МЭК 62155:2003 36 95 645 134 6,80 0,68
П 760/230 УХЛ1 АТКИ.686174.020 ГОСТ 5862-79 40 105 760 370 65,0 6,5
П 850/200 ИШУМ.757523.111 ГОСТ 5862-79 -- -- 850 350 60,0 6,0
ПРПТ-1290/590 У3 ИМЖК.757524.053 ТУ 16-528.155-76 -- -- 1290 780 424,0 42,4