DEHN DSH ZP B2 SG TNS 255 Scaricatore combinato di corrente da fulmine e sovratensione Tipo 1+2 909440

Combined lightning current and surge arrester Type 1+2 for TN-S systems, featuring spark gap technology with integrated backup fuse. It provides protection against lightning currents and surges with a maximum continuous operating voltage of 255 V AC and a lightning impulse current of 12.5 kA per pole (50 kA total).

Advantages

High discharge capacity, follow current extinguishing capability up to 50 kA rms, and fast response time of ≤100 ns. Compact design for 35 mm DIN rail mounting.

Suitable for

• TN-S power supply systems
• Main distribution boards requiring Type 1+2 protection

Key specifications

• Nominal voltage: 230/400 V AC
• Max. continuous operating voltage: 255 V AC
• Lightning impulse current (10/350 µs): 12.5 kA per pole
• Nominal discharge current (8/20 µs): 20 kA
• Voltage protection level: ≤1.5 kV
• Number of poles: 4 (3+1 configuration)
• Mounting: 35 mm DIN rail
• Degree of protection: IP20
• Operating temperature range: -40 °C to +80 °C

Recommendations

Install at the service entrance of TN-S systems to protect downstream equipment from direct lightning strikes and switching surges.