Space-saving two-pole surge arrester

March 4th, 2014, Published in Articles: EngineerIT


dehn-272-02-14The surge arresters of the Dehnconnect SD2 series are designed as space-saving terminal blocks with a width of 6 mm. These terminal blocks, with integrated surge protection, have a modular disconnection function that allows for interruptions to the signal circuit for maintenance work. An integrated module ejector disconnects the signal circuit from terminal equipment. The disconnection module does not have to be removed, but remains in a parked position in the module slot. This two-pole surge arrester for signal interfaces of data and information technology systems has a maximum impulse current carrying capability of up to 20 kA (8/20µs), as well as a fast and safe conductor connection because of the spring-loaded connection system. Different types of arresters are available and protect two single lines sharing a common reference potential (DCO SD2 ME) or an unearthed pair (DCO SD MD). The Atex and IECEx approved arrester DCO SD2 MD EX 24 can be used for intrinsically safe measuring circuits and bus systems.

Contact Alexis Barwise, Dehn Protection South Africa, Tel 011 704-1487,

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