Monitoring Relays Surge Arresters forAC systems Type DSB54 • Category IEC / EN / VDE: Class II/Type 2/C • Connection to TN-S, IT and TT networks • MOV or MOV & GDT protection • Modular design housing • Replaceable cartridges • DIN rail Mounting • IEC 61643-1 compliant Product Description Ordering Key Type Poles Contact Three Phase MCOV GDT Type Selection DSB54 X P 275 N DSB54 series of over- voltage surgeprotection devicesis suitablefor the protection of three phase AC mains con- nected devices fromthe effects of indirect light- ning discharges and induced voltages andis intended toprovide pro- tectionin zones 1-2 per IEC 62305. The modulesconsist in either an high perfor- manceVaristor(MOV) blockwith thermaldis- connection deviceoran encapsulated air gap device(GDT) whichis usedasa galvanic sep- aration betweenNand PE conductors. Plug in modules facilitate replacement of failed modules onsitewithout theneedofreplacing and rewiring the whole block. Contact None X 1 (relay)C Max. Continuous Oper. Voltage MCOV 275Vac/350Vdc275 385Vac/500Vdc385 440Vac/580Vdc440 GDT No (4+0) - (nil) Yes (3+1)N Cartridges Ordering Codes MOV for MCOV 275 arrestersDS0275 for MCOV 385 arrestersDS0385 for MCOV 440 arrestersDS0440 GDT (only for DSB54xxxxxN types) GDT cartridgeDS0255N Electrical characteristicswithoutGDT (4+0) DSB54xPxxx versions Max. Continuous Oper. Voltage Uc MCOV275Vac / 350Vdc 385Vac / 500Vdc 440Vac/580Vdc Nominal discharge current In (8/20) 20kA per pole (40kA) Max discharge currentImax (8/20) 40kA per pole (80kA) Protection levelUp 275<1.5kV 385<1.9kV 440<2.2kV Follow current If NO Response time tA<25ms Thermal protectionYES Back-up fuse (if mains >125A) 125A gL Short-circuit withstand current 25kA/50Hz Electrical characteristicswith GDT (3+1) DSB54xPxxxN versions Protection levelUp Max. Continuous Oper. Voltage Uc MCOV275Vac / 350Vdc 385Vac / 500Vdc Nom. discharge currentIn (8/20) L-N20kA N-PE20kA Max discharge currentImax (8/20) L-N40kA N-PE40kA 275 L-N <1.5kV 385 L-N <1.9kV 440 L-N <2.2kV N-PE<2.0kV Follow currentIf N-PE>100ARMS Response time tA L-N25ms N-PE100ms Thermal protectionYES Back-up fuse L-N125A gL Short-circuit withstand current L-N25kA/50Hz Specifications are subject to change without notice. Pictures are just an example. For special features and/or customization, please ask to our sales network. REV0 071113 1
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