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Function: 1. Three-phase presence indication; 2. Built-in voltage-limiting protection; 3. Have three-phase and earth connection point in order to inspect and phase conveniently; 4. Interlocking indication and interlocking relay output is available; 5. Display component adopts long-life and high light-effect LED. 6. Housing use high quality engineering plastic with strong environmental tolerance.; 7. Screened cables are used for wiring with high anti-jamming capacity. 2. Techinical Parameters Execution standardDL/T538-2006Working frequency50Hz/60HzNominal voltage3 3.6kV6 7.2kV10 12kV20 24kV35 40.5kVCapacitance of adaptive coupling element14pF , or customizedPresence indicationU>40%UnminAbsence indicationU<15%UnmaxVoltage threshold value of voltage-limiting device<30%UnminInterlocking relay output node10A/250VAC 10A/30VDCAuxiliary power supplyDC24V,DC/48V,AC/DC 110/220VAmbient Temperature-25°C +40°CWorking Humidity<95%Electric insulation level2000V/1min(power frequency)Outside dimension(mm)W×H×D96×49×95Mounting dimension(mm)W×H×D92×45×87Wiring lengthBundled 2 meters,customizable 3. Wiring diagram and specification Terminal MarkingSpecificationEarth terminalL1HV phase L1 coupling signal inputL2HV phase L2 coupling signal inputL3HV phase L3 coupling signal inputNOInterlocking output normal-open connection node. When indicate “present”, NO-COM is disconnected; indicate “absent”, connected.COMInterlocking output common connection nodeNCInterlocking output normal-close connection node. When indicate “present”, COM-NC is connected; indicate “absent”, disconnected.+/ Auxiliary power supply DC110v positive-electrode, or AC110V positive line-/NAuxiliary power common terminal DC negative-electrode, or AC zero line+/ Auxiliary power supply DC220v positive-electrode, or AC220V positive line