Insulators supporting polymeric outdoor installation are designed for isolation of fixing current-carrying parts in electrical apparatus, switchgears of electrical stations and substations of alternating current voltage of 20 kV with frequency up to 100 Hz.Climatic execution of insulators UHL, category of placement 1 according to GOST 15150.Insulators are designed to work at an altitude of not more than 1000 m above sea level at ambient air temperature from minus 60C to plus 50C.
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