NH40SZ

NH40SZ automatic changeover switch disconnector integrates electrical and mechanica l interlocking systems to guarantee safe transfer operation It is applicable for the three- phase four-wire power supply system of AC 50Hz, rated voltage AC 690V and below, DC 440V and below, rated current up to 1600A.It can realize automatic and manual changeover between normal and back up power supply power, and stop power supplying to load when changeover process of power supply is carried out.The switch is applicable for two circuits power supply and in the condition which requires high quality power supply.
Standard: IEC/EN 60947-3, 60947-6.