Surge Arrester

Surge Arrester Application range: LDY-75B series are applied to equipotential bonding of the main low voltage distribution boxes in the building, providing overvoltage protection arising from the class 1 lightning strike to power supply system or misoperation. (Option from standard IEC61643- 1 and GB50343).Main Feature: Build-in temperature control circuit breaker, high security performance;Light-off in notice window indicates normal, red indicates broken, which are clear and easy distinguished;Optional telesignalling monitoring interface, realizable remote monitoring;Function of lightning protection backup, the protection ability is available without red light on;Realizable Kevin wiring, to reduce conductor resistance; Assembled 1P, 1P+N, 2P, 3P, 3P+N, 4P etc modes, applied to various electric network systems. Main technical data TypeLDY-75BLDY-NPE/75BMax. continuous operating voltage Uc V275385420275Part No.081702081703081704081400Voltage protection level Up kV<2.3<2.5<2.8<2.0Nominal discharge current In (8/20μs) kA7575Max. discharge current Imax (8/20μs) kA120120Leakage current 75%Uc 1mA≤ 20 μAResponse time tA< 25 ns< 100 nsProtection modes1P, 1P+N, 2P, 3P, 3P+N,4PHousing materialEnhanced flame retardant nylon(light gray, flame retardancy degree: V0)Max. backup fuse/air-break switch160A gLCross-section≥ 16 mm2 stranded/flexible conductor