Protection of digital interlockings

Completely digital and highly automated – from track to train – this is what the railway system of the future looks like.
The goals: more efficient railway lines, more punctual connections and higher transport capacity. Trains no longer run at fixed block intervals, but at the most flexible yet optimal distances from each other. They recognise their surroundings and can be located with high precision. Support from artificial intelligence plays a central role. The entire technology for this is housed in the digital interlocking.

Protect the entire system from faults caused by lightning and surges and prevent the failure of sensitive digital technology.

Solutions for digital interlockings

In digital interlockings, signals are largely transmitted via fibre-optic cables. The track field power supply provides all elements in the track field, such as points, light signals, axle counters, balises and others, with electrical energy. The energy supply must be absolutely secure and it is therefore extremely important to protect it against interference from lightning events. To protect the cables from mechanical damage, a metallic rodent guard must be integrated into the surge protection concept.

951315

DEHNventil M

Multipole DEHNventil modular type 1 and type 2 according to EN 61643-11 spark-gap-based combined lightning current and surge arrester consisting of a base part and pluggable protection modules.

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956205

DEHNventil M2 TN FM

Multipole, spark-gap-based, moduler DEHNventil combined arrester type 1 + type 2 + type 3 according to EN 61643-11, consisting of a base part and a plug-in protection module.

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942565

DEHNguard MP YPV 1200 FM

Multipole type 2 DEHNguard MP YPV surge arrester, according to EN 61643-31, consisting of a base part and plug-in protection modules and double-push-in connection clamp suitable for stub wiring and feed-through wiring.

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819609

HVI light plus Conductor

HVI light plus Conductor cut to length (high-voltage-resistant, insulated down conductor) for maintaining the separation distance from electrically conductive parts as per DIN EN 62305-3 (VDE 0185-305-3).

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819636

HVI light plus Conductor

HVI light plus Conductor (high-voltage-resistant, insulated down conductor) for maintaining the separation distance from electrically conductive parts as per DIN EN 62305-3 (VDE 0185-305-3).

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999892

DEHNventil M2 DB 410 FM

Modular Type 1 + Type 2 combined arrester the protection of DC track field power supply systems at the 0–1 zone transition.

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419160

Steel earthin bridge

Stainless steel earthing bridge according to the guideline of DB Netz AG Ril 997.2025A01, for earthing, current return cicuits and equipotential bonding in railway applications.

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999925

DEHNguard 3P440 SN1861 FM

Multipole DEHNguard M surge arrester, type 2 according to EN 61643-11, consisting of a base part and plug-in protection modules.

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999926

DEHNguard M 5P440 SN1862 FM

5-pole Type 2 interference arrester specially designed for use in railway systems for the track field power cable to control permanent and short-time interference voltages.

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999985

DEHNguard M 4P440 SN1882 FM

4-pole Type 2 interference arrester specially designed for use in railway systems for the track field power cable to control permanent and short-time interference voltages.

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Compliance with the relevant directives

All products and solutions from DEHN are standard-compliant. Learn more about the rail-specific requirements and how you can meet them with our solutions.

Rail-specific standards at a glance