The new DEHNguard® DG SE CI are single-pole, modular type 2 surge arresters with a width of just 1.5 DIN modules. They consist of a base part and a protection module with integrated backup fuse. The module locking system used here makes sure that the protective module stays fixed in place, unmoved by any knocks and vibrations incurred during transport and operation or by the enormous electrodynamic forces experienced during a discharge process. At the same time, it is easy to replace the protection module without the need for tools using the module release button. The arrester can be monitored via a floating remote signalling contact.
When implementing DEHNguard® SE CI arresters the user does not have to think about the correct dimensioning of the backup fuse for the arrester because it is already integrated in the device and, as such, adjusted to the performance parameters of the surge protection components in the type 2 SPD.
The installation standard IEC 60364-5-53 limits the maximum line length for connecting an arrester to 0.5 metres. It is easy to comply with this standard using the DEHNguard SE CI arrester because there is no need for an external backup fuse and the corresponding wiring as it is already integrated in the arrester. In addition to a space-saving of 60% in comparison to arresters without an integrated backup fuse, this considerably shortens and simplifies the cable routing.
In keeping with the increasing demands on the availability of electrical systems, the function of the arrester is also monitored via an indicator and remote signalling contact. The surge protective devices are simple to install in a small space, just 1.5 DIN modules. This saves time, space and installation costs.
