Datasheet - Leutron GmbH

Lightning and Surge ProtectionIsoPro B TNIP B TN 25/50 (/FM)Combined two-pole lightning current and Surge Protective Devicemeeting the requirements of protection categories T1 (B), class IUsed as equipotential bonding lightning conductor in two-pole TN-Power Net Systems• Combined two-pole Surge Protective Device (SPD), fully prewired• Lightning current and SPD based on hermetically sealed gas filled spark-gaps• No blow-out vents, making the observance of safety distances for installationunnecessary• Protection level ≤ 4,0 kV• Lightning impulse current 25 kA (10/350 µs) per pole, in total 50 kA (10/350 µs)• High insulation resistance R isol > 10 10 Ω• Serial wiring with multifunctional screw terminal• Function control with potential-free remote signal contact (optional)Product description:This combined two-pole SPD type IP B TN 25/50 and IP B TN 25/50 /FM, with remote signal contact,offers a complete solution for the protection of two-pole TN-Power Net Systems.IP B TN 25/50 (/FM) is equipped with a newly developed hermetically encapsulated gas-filled (inertgas) isolating spark-gap and a two-step protection level (surge valve).This device is capable to discharge lightning current surges up to 25 kA (10/350 µs) per pole resp. atotal surge current of 50 kA (10/350 µs).The use of our patented spark-gaps makes dangerous blow-out vents unnecessary. This also savesyou from keeping the safety distance to adjoining electrical components usually necessary to avoidunwanted electric arcs.As there is no risk of leakage currents, this SPD can also be installed before the electric powermeter (acc. to TAB2000, installation rules of the Union of Germany Electric Works).The protective circuit is installed in an easy-to-handle compact housing with snap-on clips for35 mm DIN rail mounting with multifunctional screw terminals for wire and bus-bar connections.Installation can be carried out either by parallel-wiring via the multifunctional screw connectionterminal (terminal L´ and N´) or else as serial v-wiring via the optional two-pole bus-bar connection(L1 to L1´ and so on). There is an optional potential-free remote signal contact (/FM) inside thehousing. The wire connection is made via a pluggable screw terminal block.

Technical Data:TypeApplicationTypeIP B TN 25/50 / IP B TN 25/50 /FMtwo-pole lightning- and surge arrester for two-pole TN-Power Net Systemsprotection category T1 (B), class IIP B TN 25/50 / IP B TN 25/50 /FMArticle number 381 236 / 381 237 .Protection category acc. toE DIN VDE 0675-6 11/98-A1 and acc. to EN 61643-11resp. IEC 61643-1T1 (B), class INominal power supply voltage 50/60 Hz U n [V~] 230 / 400Rated voltage (max. continuous operating voltage) 50/60 Hz U c [V~] 255Insulation resistance R isol [Ω] > 10 10Voltage protection level at100 % lightning impulse spark over voltage (1,2/50 µs)U p [kV] ≤ 4,0Voltage protection level at I imp (10/350 µs) U p [kV] ≤ 4,0Response time t A [ns] < 50Lightning impulse current I imp (10/350 µs)I peakQW/R[kA][As][kJ/Ω]Short-circuit withstand capability at max. pre-fuse I k [kA] 25Max. permissible line resp. backup fuse F2at parallel wiringMax. permissible line resp. backup fuse F3at serial wiring[A][A]2512,5160160 A gL/gG100 A gL/gGOperating temperature range t [°C] -40 … +85Max. cross-sectional area [mm²] stranded 50 / flexible 35Recommended cross sectional area [mm²] 25Recommended connection torque [Nm] 4,5Max. cross-sectional area forremote signal contact terminalMax. switching capacity of remote signal contactMaterial of housing / colour[mm²] 1,5250 V / 0,5 APolycarbonate (halogen free) UL 94-V0 / yellowAmbient protection category (IEC/EN 60529) IP 20Mounting on DIN rail 35 mm (DIN/EN 50 022)Dimensions in mm / DiagramDimension 2x 2 modules, acc. DIN 43880Application:parallel wiringfor activelinesIf line or backup fuse (F1) ≤ 160 A gL/gGbackup fuse (F2) is not forced2pol. bus-barconnectionSerial v-wiringfor activelinesLine or backup fuse (F3) ≤100 A gL/gG04.11.2003_pdf© 2003 by Leutron GmbHSubject to technical modifications anddelivery possibleLeutron GmbHOvervoltage ProtectionHumboldtstraße 30D-70771 Leinfelden-EchterdingenMaster_T:\_Datenblätter\WORD-Dokus\Datasheet englisch\IsoPro\381236+381237_IP B TN 25-50 (06.11.2003 en).docPhone +49 711 / 9 47 71-0Fax +49 711 / 9 47 71-70Email: info@leutron.deWeb: www.leutron.de