Surge arrester T1, T2 (B, C) - spark gap ETITEC GSM T12 275/25 3+0 RC 002440607

Electrical installation protection with ETITEC GSM T1 surge arrestors

ETITEC GSM T12 surge arrester 275/25 3+0 RC is a reliable device providing comprehensive protection against the effects of surges in electrical installations. Designed to work with TN-C networks, it effectively protects against damage caused by lightning strikes and surges generated by devices inside the building. Its versatility makes it an ideal solution for both professional installers and end-users looking for solid protection.

Construction and operating parameters

This arrester combines the features of Type T1 and T2 arresters, providing multi-stage protection. Protection class Type 1+2 means that the device is able to effectively dissipate both strong current impulses related to direct lightning strikes (T1) and less intense but more frequent surges (T2). The follow current extinguishing capacity at 50 kA guarantees the safety of the installation even in the event of extreme conditions. Mounting is done on a standard DIN TH-35 mm mounting rail, which simplifies and speeds up installation.

The device is characterized by a high protection level of 1.55 kV and a specific energy of 156.2 kJ/Ohm, which translates into efficiency in absorbing surge energy. The impulse current of 25 kA (10/350 µs) confirms its ability to cope with large sudden voltage jumps. Additionally, the presence of a signaling contact and optical operation indicator allows for quick identification of potential failures and the need to replace the arrester. The maximum wire cross-section is 35 mm² for single- and multi-strand wires and 25 mm² for flexible wires, ensuring compatibility with most standard installations. The three-pole design makes these arresters suitable for protecting three-phase electrical circuits.