Dehn's modular Red/Line multipole DEHNventil M combined lightning current and surge arresters are designed for protecting low voltage installations and terminal devices against surges, even during direct lightning strikes. The devices are used according to the lightning protection zones concept at boundaries 0A - 2.
The all-in-one Type 1 modules are pre-wired combined spark-gap-based lightning current and surge arresters consisting of a base part and plug-in protection module. They provide high system availability due to their RADAX Flow follow-on current limitation. The devices have a discharge capacity up to 100 kA (10/350 μs) and there is no tripping of 32 A gL/gG fuses up to short-circuit currents of 50 kA rms.
By using encapsulated creepage discharge spark gaps, combined with their compact design, the DEHNventil M units are suitable for use in switchgear installations and distribution boards. The surge arresters can be connected in series up to nominal currents of 125 A as per IEC 60364-5-53.
The DEHNventil M units are easily exchanged by simply pressing the module release button, and the user can see the operating state/fault indication by a mark in the inspection window. The system implements monitoring of the neutral module, which is a requirement for maintenance purposes.
Various modules are available for TN-C, TN-S, TT and TN-S systems, as well as single-phase TN, TT and TN systems. DEHNventil M-FM modules have a three-pole terminal for remote signalling. With their floating changeover contact the remote signal can be used as a break or make contact according to the particular circuit concept.
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