Surge arrester DEHNbloc M 1 255, 1-pole for 230 V AC networks 961120

Protection of electrical installations against overvoltage – reliable surge arrester DEHNbloc M 1 255

This single-pole DEHNbloc M 1 255 surge arrester is a key element of every electrical installation, providing protection against the effects of lightning strikes and voltage surges in the network. The device is designed to work with 230 V AC networks and is characterized by high efficiency in limiting surge currents. Mounting on a TH-35 mm DIN rail makes integration with existing infrastructure simple and quick.

Construction and application

The DEHNbloc M 1 255 surge arrester uses RADAX-Flow spark gap technology, which provides a fast and effective response to overvoltages. This is a Type 1 device, which means it is suitable for installation as the first line of defense in a surge protection system (LPS). Its compact size – only 2 module widths – allows installation even in tight switchgear cabinets. This arrester effectively protects sensitive electrical equipment from damage caused by sudden voltage spikes.

• Versatility: Compatible with TN-C-S, TN-C, TT and TN-S network systems.
• High resistance: Rated discharge current up to 50 kA (8/20 µs) and follow current extinguishing capacity at 50 kA guarantee effective protection even with strong surges.
• Optical signaling: Built-in optical indicator informs about the operation of the arrester, facilitating diagnostics and maintenance of the installation.
• Safety: Protection level of 2.5 kV minimizes the risk of damage to connected devices.
• Flexibility: Possibility of connecting wires with a cross-section of up to 50 mm², both single-core and multi-core, ensures compatibility with various types of installations.

This arrester finds application in residential, commercial and industrial buildings, where protection against overvoltage is particularly important – it protects not only end devices, but also the electrical installation itself from failures and costly repairs. Thanks to the coordinated design, the limitation of follow-up short-circuit currents is very effective.