Surge arrester T1, T2 (B, C) - spark gap ETITEC GSM T12 275/25 3+0 002440606

Surge protection for electrical installations

The ETITEC GSM T12 275/25 3+0 surge arrester is an effective safety element for electrical installations against the effects of lightning strikes and other overvoltages. Designed to work with TN-C and TN networks, it provides protection for both installers and end-users, minimizing the risk of equipment damage and power outages. Its construction based on spark gaps and metal oxide varistors (MOV) guarantees a quick response to sudden voltage increases.

Construction and application

The device is designed for mounting on a TH-35 mm DIN rail, occupying 3 modules. Protection class Type 1+2 means that it limits both direct lightning strikes (class 1) and transient overvoltages (class 2). This surge arrester is used in residential, commercial and industrial buildings, where surge protection is crucial to ensure the continuous operation of electrical and electronic devices. Optical signaling informs about the operation of the arrester, facilitating the identification of potential problems in the installation.

Key features and benefits

• High efficiency: Impact current of 25 kA and a protection level of 1.55 kV provide effective protection against even strong overvoltages.
• Versatility: Possibility of use in TN-C networks, as well as compatibility with conductors with a cross-section of up to 35 mm² (multi-wire) or 25 mm² (flexible) facilitates installation in various types of installations.
• Energy absorption: Specific energy at 156.2 kJ/Ohm allows for absorbing a large amount of energy during a surge, protecting connected devices.
• Durability: Follow current extinguishing capacity at 50 kA guarantees safe operation in the event of a short circuit.
• Status indication: Optical indication of operation facilitates diagnostics and quick response in the event of a failure.
• Compact dimensions: Three modules allow for easy mounting of the arrester even in tight switchgear cabinets.
• Safety: Lack of integrated backup and signaling contact simplifies the construction and increases the reliability of the device.