Monitoring Relays Surge Arresters forAC systems Type DSB52 A • Category IEC / EN / VDE: Class II/Type 2/C • Connection to TN-S 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 Single Phase MCOV GDT Type Selection DSB52 X A 275 N DSB52series of overvolt- age surge protection devices is suitable for the protection of AC mains connected devices from the effects of indirect lightning discharges and induced voltages and is intended toprovide pro- tection in zones1 - 2 per IEC 62305. The modules consist ineitheranhigh performance Varistor (MOV) block withthermal disconnectiondevice or an encapsulated air gap device(GDT) whichis usedas a galvanic sepa- rationbetween N andPE conductors. Plugin mod- ulesfacilitatereplace- ment of failed modules onsitewithout theneed ofreplacing andrewiring the wholeblock. Contact None X 1 (relay)C Max. Continuous Oper. Voltage MCOV 275Vac/350Vdc275 385Vac/500Vdc385 GDT No (2+0) - (nil) Yes (1+1)N Cartridges Ordering Codes MOV for MCOV 275 arrestersDS0275 for MCOV 385 arrestersDS0385 GDT GDT cartridgeDS0255N (only for DSB52xxxxxN types) Electrical characteristicswithoutGDT (2+0)DSB52xAxxx versions Max. Continuous Oper. Voltage Uc MCOV275Vac / 350Vdc 385Vac / 500Vdc 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 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 (1+1) only DSB52xAxxxN versions 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 Protection levelUp 275 L-N <1.5kV 385 L-N <1.9kV 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 100713 1
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