Surge arrester T1, T2 (B, C) - spark gap ETITEC GSMF T12 275/25 1+0 002440723

Protection of electrical installations and devices

The ETITEC GSMF T12 275/25 1+0 surge arrester is a key element in protecting electrical installations from the effects of atmospheric and induced surges. Designed to work with TN, TN-S and TN-C systems, it effectively protects against damage caused by sudden voltage increases. Its construction based on a combination of a spark gap (T1) and a varistor (T2) provides comprehensive protection, minimizing the risk of failures and downtime of connected devices.

Construction and application

The GSMF T12 surge arrester is mounted on a TH-35 mm DIN rail and occupies 2 modules. It is intended for protecting single-phase circuits with a rated voltage of 230V and a maximum continuous operating voltage of 275V. It has a built-in fuse, which further increases safety and optically indicates the operating status. The possibility of connecting wires with a cross-section of up to 35 mm² (stranded) or 25 mm² (flexible) provides a wide range of applications in various installations.

Key features and benefits

• Versatile protection: Protection class Type 1+2 guarantees effective protection against both direct and indirect lightning strikes.
• High energy discharge capacity: Specific energy at the level of 156.2 kJ/Ohm and follow current extinguishing capacity of 75 kA allow absorption of even very strong surges.
• Fast response: Impact current at the level of 25 kA (10/350 µs) ensures a quick reaction to sudden voltage increases, minimizing the duration of the surge.
• Status indicator: Optical indication of operation facilitates identification of a damaged arrester and quick replacement.
• Safety of use: Integrated overcurrent protection protects against overload and short circuit, increasing the safety of the installation.
• Compatibility with popular systems: Designed for TN, TN-S and TN-C networks, making it a universal solution for most electrical installations.
• Compact dimensions: Occupies only 2 modules on the DIN rail, saving space in the switchgear cabinet.