Dehn SMP TNS 275 FM Surge Arrester Type T2+T3 20kA 4P Push-in

The Dehn SMP TNS 275 FM is a high-performance combined Type 2 and Type 3 surge arrester engineered specifically for TNS electrical systems. This 4-pole device is designed to safeguard sensitive electronic equipment by effectively limiting transient overvoltages that can occur due to switching operations or indirect lightning strikes. With a robust 20kA discharge capacity, it provides a reliable barrier against electrical surges, ensuring the longevity and operational stability of connected devices in residential and commercial installations.

Advantages

The primary advantage of this surge arrester is its advanced Push-in connection technology, which significantly simplifies the installation process by allowing for quick and secure conductor termination without the need for specialized tools. The integrated remote signaling contact allows for seamless status monitoring, enabling users to receive immediate feedback on the device's operational health. Its compact design and dual-functionality as both a Type 2 and Type 3 arrester make it an efficient space-saving solution for modern distribution boards.

Suitable for

• Protection of sensitive electronic devices in TNS power networks
• Residential electrical distribution boards
• Commercial office equipment and IT infrastructure
• Industrial control systems requiring fine protection

When it may not be suitable

This device is specifically designed for TNS systems and is not compatible with other earthing arrangements such as TT or IT systems without appropriate modifications or additional equipment. It should not be used as a primary lightning protection device in areas subject to direct lightning strikes, as it is intended for secondary surge protection.

Key specifications

• Type: Combined Type 2 and Type 3 surge arrester
• Configuration: 4-pole
• Discharge capacity: 20kA
• Connection technology: Push-in terminals
• Monitoring: Integrated remote signaling contact
• System compatibility: TNS

How to use

The device is designed for mounting on a standard DIN rail within an electrical distribution cabinet. Ensure the power supply is disconnected before beginning the installation. Insert the conductors into the Push-in terminals according to the wiring diagram provided with the unit, ensuring a firm connection. Connect the remote signaling contacts to your monitoring system if required. Once installed, verify that the status indicator shows the device is ready for operation.

What to consider before purchase

• Verify that your electrical installation is a TNS system
• Ensure there is sufficient space on the DIN rail within your distribution board
• Check if remote monitoring integration is required for your specific setup
• Confirm that the discharge capacity meets the requirements of your local electrical regulations

Usage recommendations

Regularly inspect the status indicator on the device to ensure it remains in a functional state. If the indicator signals a fault, the surge arrester module should be replaced immediately to maintain continuous protection for your equipment.