trip unit - STR22SE OSN - 250 A - 4 poles 3dShow more characteristics >
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Main range of productNS100...250NR100...250 product or component typeTrip unit range compatibilityCompact NS250Compact NR100Compact NR250 device applicationDistribution poles description4P protected poles description3t + 1.6 N3t neutral positionLeft network typeAC network frequency50/60 Hz trip unit nameSTR22SE OSN trip unit technologyElectronic trip unit rating225 A 70 °C250 A 20 °C237.5 A 60 °C protection typeShort time short-circuit protectionOverload protection (long time) Complementary long time pick-up adjustment type IrAdjustable 48 settings [Ir] long time pick-up adjustment range0.25...0.63 x In long time delay adjustment typeFixed [tr] long-time delay adjustment range90...180 s at 1.5 x Ir3.2...5 s at 7.2 x Ir5...7.5 s at 6 x Ir short-time pick-up adjustment type IsdAdjustable 8 settings [Isd] short-time pick-up adjustment range2...10 x Ir short-time delay adjustment typeFixed [tsd] short-time delay adjustment range0.04...0.06 s instantaneous pick-up adjustment type IiFixed display typeLED Environment standardsIEC 60947-2 product certificationsASTAASEFAKEMALCIE IP degree of protectionIP40 conforming to IEC 60529 pollution degree3 conforming to IEC 60947 ambient air temperature for operation-25...70 °C ambient air temperature for storage-50...85 °C Contractual warranty Warranty period18 months
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