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Three-phase presence indication;Built-in voltage-limiting protection and maximum current load capacity is 50A;Have three-phase and earth connection point in order to inspect and phase conveniently;Resins are used for filling to protect PCB and the product pass environmental immunization test in the lab of Norway ABB;Terminals have self-locking function and are not easy to be separated;Three-phase inner curving design to avoid short circuit among terminals due to moisture and condensation.Technical parameters: Execution standardIEC61958-2000Working frequency50Hz/60HzNominal voltage3 6kV6 12kV10 24kV24 40.5 kVCapacitance of adaptive coupling element18pF,customizedPresence indicationU>45%UnminAbsence indicationU<10%UnmaxVoltage threshold value of voltage-limiting device<30%UnminAmbient Temperature-25°C +40°CWorking Humidity<95%Electric insulation level2000V/1min(power frequency)Protection degreeIP20Outside dimension(mm)W×H×D130×28×52Mounting dimension(mm)W×H×D105×22×48.5screw hole pitch 120Wiring lengthWiring A:L1=960mm,L2=1070mm,L3=1180mm,customizable Utility Model Patent: ZL 200820102814.6