Dehn + Sohne DEHNvenCI combined lightning current and surge arrester

The DEHNvenCI combined lightning current and surge arrester with integrated backup fuse combines maximum system protection and compact dimensions in a single device.The arrester allows space-saving integration of a combined lightning current and surge arrester and is said to meet the protection requirements of modern switchgear installations.

The arrester has a discharge capacity up to 25 kA (10/350) and combines system protection and compact dimensions in a single device. The features of the DEHNventil family were combined with a lightning-current-carrying arrester backup fuse in an enclosure with a width of only two modules.

The arrester not only allows space-saving integration of a combined lightning current and surge arrester, but also meets the protection requirements in modern switchgear installations. The integrated arrester backup fuse is dimensioned to ensure maximum discharge capacity and optimal system protection.

The need to select and install an arrester backup fuse is eliminated, ensuring short connecting cable lengths as required in IEC 60364-5-53.
The arrester is said to allow protection of terminal equipment if the distance between it and the consumers is ≤5 m. The ability to carry lightning impulse currents without destruction and simultaneously reduce the energy to an acceptable level for terminal equipment ensures the availability of the switchgear installation in case of a lightning strike. This considerably reduces the risk of high loss failures.

Even in case of short-circuit currents as high as 50 kA rms, DEHNvenCI can be used in industrial systems without restrictions.