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Tameson UK£1,286.89Visit shop Dehn Dv M Tns 255 Fm Modular Multipole Surge Protection - 951405
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The DEHN DV M TNS 255 FM (951405) is a multipole, modular surge arrester designed for low-voltage consumer installations in commercial and industrial buildings, particularly those using TN-S systems. Its key benefit is robust protection against surges and direct lightning strikes, ensuring high availability of terminal equipment. A potential caveat is its specific application in TN-S systems, requiring proper system compatibility assessment.
| Model Part Number | 951405 |
|---|---|
| Brand | Dehn |
A Type 1 + 2 surge arrester combines the functions of a Type 1 (lightning current arrester) and a Type 2 (surge arrester) into a single device, providing comprehensive protection against both direct lightning strikes and subsequent surges.
TN-S stands for 'Terra-Neutral-Separate,' an earthing system where the neutral conductor and the protective earth conductor are kept separate throughout the entire supply network.
RADAX Flow is a technology used in DEHN surge arresters that effectively limits follow currents, ensuring that after a surge is suppressed, the electrical system can quickly return to normal operation without sustained current flow through the arrester.
While designed for commercial and industrial use, its suitability for residential buildings depends on the specific electrical installation and protection requirements. It is typically installed in the main distribution board.
The DEHN DV M TNS 255 FM may include visual indicators on the modules. Refer to the product manual for specific status indication information. A qualified electrician should perform replacements.
The maximum continuous voltage (Uc) for this arrester is AC 264V.
The nominal voltage (Un) is AC 230V.
Check the connection to the electrical system and ensure the protection modules are correctly seated in the base.
Immediately de-energize the system and contact a qualified electrician. This may indicate a severe surge event or internal fault.
Verify the system's earthing is correct and that the arrester is suitable for the network's voltage and surge characteristics. Consult the installation manual or a DEHN technician.
Setup: Installation requires professional expertise. The device comprises a base and pluggable protection modules. It is designed for TN-S systems and should be installed at the boundary of lightning protection zones 0A and 2, typically at the main distribution board.
Compatibility: This arrester is specifically designed for TN-S earthing systems. Ensure your installation matches this configuration before proceeding.
Care: No regular user maintenance is typically required. Periodic visual inspection by qualified personnel is recommended to ensure the device is undamaged and operating correctly. Faulty modules should be replaced using genuine DEHN spares.
