Surge arrester DEHNshield TNS 255 Basic FM Type 1+Type 2 941406

Electrical installation protection with DEHNshield TNS 255 Basic FM

The DEHNshield TNS 255 Basic FM surge arrester is a multi-pole, combined type 1 and type 2 protective device based on spark-gap technology. It is designed to protect electrical installations in residential buildings, both new and modernized. Its compact design – only one module wide per pole – saves space in the distribution board.

This four-pole arrester is intended for TN(C)-S networks with a rated voltage of 230/400 V. It meets the requirements of PN-HD 60364-5-534:2016 and PN-HD 60364-4-443:2016, guaranteeing its compliance with applicable regulations and safety standards. The possibility of direct mounting at the input of the electrical installation simplifies installation and minimizes voltage drop.

• Versatile application: ideal for residential buildings powered from both overhead and cable networks.
• Effective protection: provides protection against the effects of atmospheric overvoltages (lightning strikes) and overvoltages generated by devices inside the building.
• Safety and reliability: meets strict European standards, guaranteeing high quality and long-term operation.
• Compact dimensions: saves space in the distribution board thanks to its one-module-wide design per pole.
• Spark-gap technology: limits follow currents, protecting devices from damage.
• Damage indicator: allows quick identification of the need to replace the device after a surge.

The arrester is characterized by high strength parameters – the lightning impulse current (10/350 µs) is as high as 30 kA, and the voltage protection level is a maximum of 1.5 kV. This effectively protects sensitive electronic devices from damage caused by sudden voltage spikes. This is particularly important in modern buildings equipped with advanced consumer electronics. In addition, the device is compatible with energy coordination according to DIN EN 62305-4, which allows for optimal adaptation of the lightning protection system to specific installation conditions.