Product and application videos

The DEHNguard® SE H LI type 2 surge arrester with “Lifetime Indication” protects installations with high availability requirements. The three-step indication shows at an early stage whether protection modules have to be replaced. The repeatedly used, but still functional arrester can be quickly identified and replaced without prolonged interruption of the protective circuit.

The devices of the modular DEHNventil® family provide a combination of safety and innovation. Designed for "all-in-one installation", the arresters integrate lightning equipotential bonding and surge protection in a single device, making them ideal for use in compact electrical installations. The energy-coordinated arresters even allow to protect terminal equipment if the distance between DEHNventil® and the loads is ≤ 5 m. With a lightning current discharge capacity up to 100,000 A, the arresters ensure a high degree of availability of the electrical installation to be protected.

The DEHNguard® YPV SCI ... surge arresters are specifically designed for protecting equipment in photovoltaic systems. The patented three-step d.c. switching device (SCI principle) makes these arresters particularly safe so that they fulfil all requirements in modern photovoltaic systems. The devices are available as 600 V and 1000 V versions and cover the most common voltage levels for string inverter systems.

The single-pole and multipole surge arresters of the DEHNguard® ... H LI family provide maximum safety and user-friendliness and set new standards in surge protection. With the "Pro-Active Thermo Control" concept, they are the first "intelligent" surge arresters to warn the user of failures of the surge protective device in due time. With this concept, the new SPD monitoring device meets the ever increasing requirements on the availability of electrical systems in industrial, commercial and domestic environments. The three-way visual indication GREEN-YELLOW-RED along with a floating changeover contact for remote signalling provides information on the operating state of the arrester. If there is a risk that the varistor might be irreversibly damaged due to an increased energy load, the yellow indicator and the remote signalling function indicate that the protection module should be replaced, thus preventing that the installation is unprotected!

Surges can occur both on the a.c. and d.c. side of the inverter. For this reason, it is important to protect both sides. A DEHNguard® modular arrester installed in the main distribution board protects the inverter on the a.c. side.There is no distribution board on the d.c. side of the inverter. For this reason, it is advisable to install a DEHNcube surge arrester. Thanks to its compact design DEHNcube can be quickly and easily installed next to the inverter. PV systems must generate electricity for more than 20 years. Surge protective devices from DEHN protect photovoltaic systems from damage and failure resulting from surges and ensure yields in the long term.

The modular DEHNguard® SE DC type 2 surge arrester protects direct current applications from the effects of lightning strikes and surges. The new d.c. switching device DCD is designed in such a way that the protective device is safely disconnected in case of overload, thus preventing d.c. switching arcs and the resulting fire damage. Consequently, DEHNguard® SE DC provides protection during the whole service life of an electrical system. The surge arrester can be used without additional backup fuse for direct currents up to 300 A. The mechanical operating state / fault indication and the optional remote signaling contact complete the functionality of the device with a modern design of 1.5 modules.

In this video we show you how much time you can save when installing the new rebar clip DEHNclip compared to conventional clamps.

The HVI®long is a high-voltage-resistant insulated down conductor for keeping the separation distance to electrically conductive parts in your lightning protection system according to IEC/EN 62305-3. It can be used up to an equivalent separation distance s ≤ 75 cm (in air) or s ≤ 150 cm (solid building material). For on-site assembly, the HVI®long Conductor is delivered in a length of 100 m on a disposable plywood reel (diameter approx. 800 mm, width approx. 485 mm) incl. one Allen key.

HVI®power Conductor (high-voltage-insulated down conductor) can also be used in lightning protection level I as the whole system was tested with 200 kA lightning impulse current (10/350 µs). Thus, HVI®power Conductor is the perfect solution for all lightning protection levels.

The HVI®power lightning protection system is ideally suited for flat roofs. It is a combination of individual components such as a self-supporting air-termination system – consisting of an air-termination rod, supporting tube, tripod with side outlet and HVI®power Conductor (high-voltage-resistant, insulated down conductor) – as well as other products.