DEHN DSH ZP 2 TT 255 Combined Lightning Current and Surge Arrester Type 1+2 909531

With a lightning impulse current of 12.5 kA per pole (10/350 µs) and a voltage protection level of ≤ 1.5 kV, the DEHN DSH ZP 2 TT 255 is a high-performance combined arrester for TT and TN-S systems.

Overview

The DEHNshield ZP 2 TT 255 is a 2-pole combined lightning current and surge arrester (Type 1+2) designed for 255 V AC systems. It uses spark gap technology (RADAX Flow) to safely divert lightning currents and surges, protecting electrical installations from damage.

What stands out

• Combined Type 1+2 protection in a compact 2-module design
• High follow current extinguishing capability of 50 kA rms
• No remote signaling contact, simplifying installation
• Thermoplastic enclosure with UL 94 V-0 flammability rating

Technical details

• SPD Type: Type 1 + Type 2
• System Configuration: TT and TN-S
• Max. Continuous Operating Voltage (Uc): 255 V AC
• Nominal Discharge Current (In) (8/20 µs): 20 kA
• Lightning Impulse Current (Iimp) (10/350 µs): 12.5 kA per pole
• Voltage Protection Level (Up): ≤ 1.5 kV
• Follow Current Extinguishing Capability (Ifi): 50 kA rms
• Short-Circuit Withstand Capability (Isccr): 50 kA rms
• Response Time (tA): < 100 ns
• Operating Temperature Range: -40 °C to +80 °C
• Mounting Type: 35 mm DIN Rail
• Number of Poles: 2
• Enclosure Material: Thermoplastic, UL 94 V-0
• Degree of Protection: IP20
• Standards Compliance: EN 61643-11 / IEC 61643-11
• Technology: Spark Gap (RADAX Flow)
• Remote Signaling Contact: No

Our verdict

The DEHN DSH ZP 2 TT 255 is a reliable choice for protecting TT and TN-S systems against lightning currents and surges, offering robust performance in a compact form factor.