Surge arrester DEHNguard M TT ACI 275 FM Type 2 952341

Electrical installation protection with DEHNguard M TT ACI 275 FM

This four-pole surge arrester DEHNguard M TT ACI 275 FM is a key element ensuring the safety of the electrical installation against the effects of overvoltages. Designed in accordance with PN-EN 61643-11 (type 2), it effectively protects electrical devices in residential and commercial buildings. It is a modular, ready-to-connect arrester, which greatly simplifies installation and configuration.

This arrester is used in TT and TN-S networks with a rated voltage of 230/400 V, offering a voltage protection level of up to 1.5 kV. The rated discharge current of 20 kA guarantees effective protection even with strong surge pulses. The built-in disconnector and spark gap eliminate the need for additional external fuses, which translates into saving time and installation costs.

Construction and functionality for professionals

DEHNguard M TT ACI 275 FM utilizes advanced ACI (Automatic Current Interrupt) technology, which, combined with the “Thermo Dynamic Control” monitoring and disconnecting device, ensures reliable operation and long-term protection. The mechanical damage indicator of the arrester facilitates quick identification of the need to replace the protective module. Additionally, the presence of a remote signaling contact allows for monitoring the device status and integration with building management systems.

This arrester is part of the Red/Line family from DEHN, which guarantees high quality workmanship and compliance with the latest safety standards. Energy coordination according to DIN EN 62305-4 ensures optimal cooperation with other elements of the lightning protection system. Thanks to this, the installer can be sure that the system works efficiently and effectively protects the installation from damage caused by atmospheric overvoltages or disturbances in the power grid.

Advantages for the end user

• Effective protection: Protects connected devices from damage caused by overvoltages, which translates into financial savings and avoiding downtime of devices.
• Safety: Provides a high level of safety for the use of the electrical installation for the whole family or company employees.
• Reliability: Thanks to the use of advanced technologies and high-quality materials, the arrester is characterized by a long service life and reliable operation.
• Simple diagnostics: The damage indicator makes it easy to quickly check the device status without the need for disassembly.
• Compact dimensions: A width of only 4 modules allows for easy installation in standard electrical distribution boards.