Surge arrester DEHNshield TNC 255 "DSH TNC 255" 941300

Surge protection in TN-C network

The DEHNshield TNC 255 surge arrester is a combined device, combining the functions of type 1 and type 2 arresters, designed to protect electrical installations in TN-C networks. It provides effective protection against the effects of lightning strikes and overvoltages generated by devices inside the building. It is a key element ensuring the safety and continuity of the installation.

Construction and application

The device is designed for mounting on a TH-35 mm DIN rail and occupies 4 modules. The construction based on spark gap technology guarantees high reliability and long life. The arrester is used in residential, commercial and industrial buildings where protection against overvoltages in TN-C networks is required. Thanks to its compact size, it is ideal for installation in switchboards with limited space.

Key features and benefits

• Versatile protection: The combination of type 1 and type 2 arresters provides comprehensive protection against various types of overvoltages.
• High efficiency: Impact current of 37.5 kA guarantees effective protection even during strong lightning strikes.
• Energy coordination: Ensures coordinated protection with end devices, minimizing the risk of damage.
• Optical signaling: The optical indicator informs about the operation of the arrester, facilitating diagnostics and maintenance.
• Safety: The ability to extinguish the follow current at the level of 25 kA ensures the safety of the installation and minimizes the risk of fire.
• Universality: Suitable for operation with conductors with a cross-section of up to 35 mm², allowing its use in various types of installations.
• Durability: Made of high-quality materials, resistant to environmental conditions, ensuring long-lasting and reliable operation of the device.
• Protection against damage: Maximum additional fuse 160 A gG protects the arrester against overload.

Technical parameters (for information):

• Rated AC voltage: 230 V
• Impact current (10/350 µs): 37.5 kA
• Specific energy (W/R): 352 kJ/Ohm
• Protection level: 1.5 kV
• Number of poles: 3
• Mounting method: TH-35 mm DIN rail
• Degree of protection (IP): IP20

This surge arrester is a solid solution for anyone who cares about the safety of their electrical installation and wants to avoid costly failures caused by overvoltages.