Coordinated and modular single-pole Lightning Current Arrester for d.c. Applications
- Coordinated spark-gap-based lightning current arrester consisting of a base part and a plug-in protection module
- Spark gap technology particularly suited for use in d.c. circuits
- High lightning current discharge capacity of 25 kA (10/350 µs)
- Directly coordinated with DEHNguard SE DC ... surge protective devices
- Low voltage protection level
- Operating state / fault indication by green / red indicator flag in the inspection window
- Easy replacement of protection modules due to module locking system with module release button
DEHNsecure M 1 ... FM: With remote signalling contact for monitoring device (floating changeover contact)
DEHNsecure M 2P ...: Coordinated and modular two-pole lightning current arrester for d.c. applications
DEHNsecure M 2P ... FM: With remote signalling contact for monitoring device (floating changeover contact)
They can be energy-coordinated with type 2 surge arresters of the DEHNguard SE DC family.
The DEHNsecure arresters combine high performance and ease of use in a single device. Their electrical parameters are rated for the most stringent requirements in lightning and surge protection systems.
The internal structure of the DEHNsecure spark gap is suited for use in d.c. circuits. The device concept prevents mains follow currents up to 25,000 A d.c. from occurring.
With this new arrester series, a consistent lightning protection zone concept including the cross-boundary d.c. lines can now be implemented.
Furthermore, the leakage-current-free version of the spark-gap-based arrester offers numerous advantages when used in insulation monitored systems or in applications where the highest demands are placed on the self-energy consumption.
DEHNsecure arresters are used, for example, in safety lighting systems, emergency power supplies, d.c. systems for direct supply of d.c. drives, control circuits and any kind of battery-operated power supply.
DEHNsecure M 1 60 (FM) and DEHNsecure M 2P 60 (FM) are specifically developed for Remote Radio Head (RRH) applications. Designed for possible high load currents, they leave sufficient spare capacity for future extensions in the field of mobile communication.
DEHNsecure M 1 242 (FM) is used for safety lighting systems. The relevant consumers are supplied with a.c. voltage during normal operation and with battery-operated d.c. voltage during emergency operation. As surges may occur during both operating states, DEHNsecure M 1 242 is suited for direct and alternating currents (backup fuse max. 10 A gG).
The modular design of the DEHNsecure arresters makes them safe and user-friendly. Their vibration-proof module locking system, for example, is unique. Shock or vibration during transport or operation or enormous mechanical impulse loads resulting from discharges do not affect the module locking system which ensures safe fixation both for the base part and protection module. Nevertheless, the protection modules can be easily replaced without tools by simply pressing the easy-to-use module release button. The mechanically coded base part and protection module avoid installing an incorrect module. DEHNsecure arresters incorporate double terminals, allowing series connection of the arresters in a space-saving and cost-effective way according to IEC 60364-5-53 requirements for nominal currents up to 125 A.
The operating state / fault indicator of DEHNsecure does not cause operating currents and instantly shows the operating state of the device. Apart from the standard visual indicator with red and green indicator flags, DEHNsecure ... FM devices have an additional remote signalling output. As the remote signalling contact is designed as a floating changeover contact, the remote signal can, depending on the circuit concept, be used as a make or break contact.