DEHN SET 1 DSH ZP B2 LSG TT + 1X DSHU Combined Lightning Current and Surge Arrester Type 1+2, 4-Pole, 255 V, 50 kA 909655

With a total lightning impulse current of 50 kA (10/350 µs), the DEHN SET 1 DSH ZP B2 LSG TT + 1X DSHU provides robust protection for metering points in residential and commercial buildings. This combined Type 1+2 arrester handles both lightning currents and surges, ensuring reliable operation in TT and TN-S earthing systems.

Overview

The set includes a DEHNshield ZP B2 LSG TT module and a DSHU replacement module. It is designed for 35 mm DIN rail mounting and features spark-gap technology to extinguish follow currents up to 50 kA rms. The arrester operates at a nominal voltage of 230/400 V AC with a maximum continuous operating voltage of 255 V AC.

What stands out

• High discharge capacity: 12.5 kA (10/350 µs) per pole, 50 kA total
• Low voltage protection level: ≤ 1.5 kV
• Wide operating temperature range: -40 °C to +80 °C
• Includes replacement module DSHU

Technical details

• Arrester type: Combined lightning current and surge arrester (Type 1+2)
• Earthing systems: TT, TN-S
• Nominal voltage (Un): 230/400 V AC
• Maximum continuous operating voltage (Uc): 255 V AC
• Nominal discharge current (In): 20 kA (8/20 µs) per pole
• Lightning impulse current (Iimp): 12.5 kA (10/350 µs) per pole
• Total lightning impulse current (Itotal): 50 kA (10/350 µs)
• Voltage protection level (Up): ≤ 1.5 kV
• Follow current extinguishing capability (Ifi): 50 kA rms
• Short-circuit withstand capability (Isccr): 50 kA rms (with max. 160 A gG backup fuse)
• Number of poles: 4 (3-phase + N)
• Mounting: 35 mm DIN rail
• Degree of protection: IP20
• Operating temperature: -40 °C to +80 °C
• Standards: EN 61643-11, IEC 61643-11
• Design: Spark-gap-based
• Application: Metering points (Zählerplatz) in residential and commercial buildings
• Included components: 1x DEHNshield ZP B2 LSG TT module, 1x DSHU replacement module

Our verdict

A powerful and reliable surge protection solution for main distribution boards, offering high discharge capacity and easy installation with the included replacement module.