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SL series load isolation switch mainly suitable for AC 50Hz,rated voltage to 660V,DC rated voltage up to 440V,rated current up to 3,150A,The switch is used in the infrequent making and breaking circuit. 63A 1600A is suitable for the making and breaking of electrical isolation circuit or electrical insulation 63A 1600A possesses three poles,and four poles (three poles+on off neuctral pole.) Two sats of auxiliary contacts can be assembled according to demand Side operation operation outside ,the board can be assemble according to demand