Surge protective device type T2, 4 poles, In: 20kA (8/20), Imax: 40kA, Uc: 275V AC RSP-T2-AC/4P 2617134

Professional surge protection for AC installations

The Type T2 surge arrester is a key component of the electrical installation protection system against the effects of lightning discharges and voltage surges. Designed in accordance with the lightning protection zone (LPZ) concept for zones 0-1, the device provides comprehensive protection for low-voltage equipment in environments with an elevated risk of voltage surges.

Technical parameters and protection performance

The RSP-T2-AC/4P model offers advanced protection with a nominal discharge current In of 20 kA and a maximum discharge current Imax up to 40 kA. These parameters enable effective absorption of lightning discharge energy while maintaining stable operation of the protected installation.

The maximum continuous operating voltage Uc of 275 V AC allows safe operation in standard single-phase and three-phase networks. The protection level Up ≤ 1.5 kV ensures effective limitation of voltage surges to a level safe for connected electrical equipment.

The device response time does not exceed 25 ms, ensuring an immediate reaction to the occurrence of a dangerous voltage surge. The integrated backup protection 125 A gL/gG protects the arrester itself from damage in case of overload or short circuit in the protected installation.

Construction and installation compatibility

The four-pole construction occupying 4 modules on a standard TH-35 mm DIN rail enables easy installation in electrical distribution boards. Compact dimensions of 72×67×90 mm allow optimal use of available mounting space while maintaining full functionality.

The device is compatible with the TN-S network system, enabling its use in modern installations with separate neutral and protective conductors. The construction allows connection of various cable types:

• Flexible/multi-strand cables up to 35 mm²
• Rigid single-strand/multi-strand cables from 1.5 mm² to 25 mm²

Functionality and status indication

The arrester is equipped with optical status indication, enabling quick identification of the need to replace the insert after a voltage surge. This feature significantly facilitates servicing and maintenance of the protection system.

The device features integrated backup protection, eliminating the need for additional protective elements. The construction is adapted for outdoor applications, expanding the range of possible uses to installations exposed to atmospheric conditions.

The enclosure protection rating is IP20, ensuring proper insulation of internal components against accidental contact. The net weight of the device is 376 g, facilitating installation and avoiding excessive load on the distribution board structure.

Regulatory compliance and application areas

The arrester has been designed in accordance with the requirements of standard IEC 61643-11:2011, confirming its high quality and operational safety. Class II/B guarantees an appropriate level of insulation and electrical safety.