Main rangeCompact product nameCompact NSX product or component typeCircuit breaker device short nameCompact NSX250B device applicationDistribution poles description4P protected poles description3t3t + 1.6 N3t + N/24t neutral positionLeft network typeAC network frequency50/60 Hz [In] rated current250 A ( 40 °C ) [Ui] rated insulation voltage800 V AC 50/60 Hz [Uimp] rated impulse withstand voltage8 kV [Ue] rated operational voltage690 V AC 50/60 Hz breaking capacity codeB (25 kA) AC breaking capacity25 kA Icu at 380/415 V AC 50/60 Hz conforming to IEC 60947-215 kA Icu at 500 V AC 50/60 Hz conforming to IEC 60947-220 kA Icu at 440 V AC 50/60 Hz conforming to IEC 60947-240 kA Icu at 220/240 V AC 50/60 Hz conforming to IEC 60947-2 [Ics] rated service breaking capacityIcs 15 kA 500 V AC 50/60 Hz conforming to IEC 60947-2Ics 20 kA 440 V AC 50/60 Hz conforming to IEC 60947-2Ics 25 kA 380/415 V AC 50/60 Hz conforming to IEC 60947-2Ics 40 kA 220/240 V AC 50/60 Hz conforming to IEC 60947-2 suitability for isolationYes conforming to EN 60947-2Yes conforming to IEC 60947-2 utilisation categoryCategory A trip unit nameMicrologic 5.2 A trip unit technologyElectronic trip unit protection functionsLSI trip unit rating160 A ( 40 °C ) protection typeOverload protection (long time) LInstantaneous short-circuit protection IShort time short-circuit protection S pollution degree3 conforming to IEC 60664-1 Complementary control typeToggle mounting modeFixed mounting supportBackplate upside connectionFront downside connectionFront mechanical durability20000 cycles electrical durability10000 cycles 440 V In conforming to IEC 60947-210000 cycles 690 V In/2 conforming to IEC 60947-220000 cycles 440 V In/2 conforming to IEC 60947-25000 cycles 690 V In conforming to IEC 60947-2 connection pitch35 mm local signallingLED 105 % IrLED 90 % IrLED ready neutral protection setting0.5 x Ir 3t + N/21 x Ir 4t1.6 x Ir 3t + OSNNo protection 3t long time pick-up adjustment type IrAdjustable long time pick-up adjustment range63...160 A long time delay adjustment typeAdjustable [tr] long-time delay adjustment range15...400 s 1.5 x Ir0.35...11 s 7.2 x Ir0.5...16 s 6 x Ir thermal memory20 minutes before and after tripping short-time pick-up adjustment type IsdAdjustable [Isd] short-time pick-up adjustment range1.5...10 x Ir short-time delay adjustment typeAdjustable [tsd] short-time delay adjustment range0...0.4 s instantaneous pick-up adjustment type IiAdjustable instantaneous pick-up adjustment range1.5...12 x In zone selective interlocking ZSIWith communication of dataDemand current and powerEnergy meteringInstantaneous and demand valuesMaintenance indicatorsMaximeters/minimetersPower qualityProtection and alarm settingsTime-stamped histories and event tables display typeLCD display type of measurementAmmeter electrical data recordingMaintenance indicators height161 mm width140 mm depth86 mm product weight2.8 kg Environment overvoltage categoryClass II electrical shock protection classClass II standardsEN/IEC 60947 product certificationsCCCMarineEAC IP degree of protectionIP40 conforming to IEC 60529 IK degree of protectionIK07 conforming to IEC 62262 ambient air temperature for operation-35...70 °C ambient air temperature for storage-55...85 °C Offer Sustainability Sustainable offer statusGreen Premium product RoHS (date code: YYWW) REACh Product environmental profileAvailable Product end of life instructionsAvailable Contractual warranty Warranty period18 months 18 months
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