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Combining lightning current and surge arresters

The multipole combined lightning current and surge arresters of the DEHNventil 2P TT product family offer an all-in-one solution - lightning equipotential bonding and surge protection in one device. DEHNventil 2P TT is able to replace six single components in a conventional system. Energy coordination with downstream Red/Line surge protective devices in low voltage consumers' installations is ensured without additional cable lengths or decoupling inductances.

Easily installed in different types of power supply systems, DEHNventil 2P TT makes calculations unnecessary. It is capable of protecting equipment, even in the case of a lightning strike with a lightning current discharge capacity of 50 kA (10/350).

By using the encapsulated spark gap technology, safety distances to adjacent components within the distribution cabinet are unnecessary. Even at fault currents up to 50 kA rms a 35 A fuse will not trip when DEHNventil 2P TT extinguishes the follow-on current.

The combined current and overvoltage arrester has no leakage current. This allows direct use of the device upstream of the meter and when testing the insulation, no disconnection is required.

By using the twin terminals, connection is easy and inductive volt drop across long connection cables is avoided. An additional bus bar terminal at the output increases the combination possibilities with other DIN rail mounted components.

Integrated lamp indication is provided, or if required, the optional DEHNsignal DSI DV 2P remote monitoring module informs the user on the state of the protection, even when he is not on site.

All DEHNventil devices have an additional earth terminal. This allows a safe connection to the main earth bar as well as short connection to the protective earth conductor of the power supply system.

By using the double terminals which are suitable for all conductors, they allow a serial connection up to nominal currents of 125 A in a space and cost saving way to IEC 60364-5-53 requirements.

DEHN is represented locally by Surge Technology.

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