DEHN + SOHNE DEHNsecure DC surge protective device range

A range of DC surge protective devices that protect DC applications, including LTE (4G) GSM sites, is available from DEHN + SOHNE. The DEHNsecure range is available for 60, 220 and 242 VDC and fulfils the requirements in accordance with the lightning protection zones concept including the cross-boundary DC lines as per IEC 62305-4.

The internal structure of the DEHNsecure spark gap is suited for use in DC circuits. The spark gap prevents mains follow currents from occurring. DEHNsecure arresters are used for railway DC control circuits, emergency safety lighting, emergency power supplies, remote radio heads (RRH), DC systems for direct supply of DC drives control circuits and any kind of battery-operated power supply.

A modular device, the DEHNsecure product range is a coordinated lightning current arrester with a discharge capacity of 25 kA (10/350) and a functional design. They are energy coordinated with Class II type surge arresters without requiring a decoupling device or additional cable length. Their electrical parameters are rated for the most stringent requirements in lightning and surge protection systems. The modular design of the DEHNsecure arresters makes them safe and user friendly.

The vibration-proof-tested module locking system, for example, is said to be unique. The mechanically coded base section and protection module prohibits installing an incorrect replacement module. DEHNsecure arresters incorporate double terminals for connecting conductors, allowing series connection of the arresters in a space-saving and cost-effective way according to IEC 60364-5-53 requirements. The operational status/fault indication provides real-time information regarding the operational status of the arrester even if no operating current is present. The DC arresters are classified as Class I type arresters according to EN 61643-11 and IEC 61643-1/11.