Surge arrester type T1+T2, pole 3+NPE, Limp: 7 kA (10/350), In: 20kA (8/20), Imax: 50kA, Uc: 255V AC RSP-T1T2-AC 7/3+NPE 2617130

Protection of electrical installations against overvoltage

This surge protector, designated RSP-T1T2-AC 7/3+NPE, is a key element ensuring the safety of the electrical installation. Designed to protect against the effects of lightning strikes and overvoltages in the network, it provides a reliable barrier for sensitive electronics and electrical devices. Its construction based on a combination of a varistor and a spark gap (class B+C, i.e. type T1+T2) guarantees a quick response and effective voltage limitation.

Construction and application

The surge protector is intended for installation in AC systems with a voltage of 255V AC. The 3+NPE configuration (3 phases + neutral with grounding) makes it an ideal solution for a wide range of applications – from single-family homes, through commercial buildings, to industrial facilities. Use in lightning protection systems (LPZ 0-1 zone concept) increases the overall effectiveness of protection. It is worth remembering that these types of surge protectors are designed in accordance with IEC 61643-11:2011, which confirms their compliance with the highest safety standards.

Parameters and performance

The device is characterized by high strength parameters. Peak current Limp at 7 kA (for a 10/350 μs impulse) means the ability to absorb strong overvoltages. Rated discharge current In of 20 kA (8/20 μs) and maximum discharge current Imax at 50 kA demonstrate its reliability in the event of frequent and intense disturbances. In addition, the protection level Up ≤ 1.5 kV ensures effective limitation of the voltage to a safe level. A visual indicator of the protection status (green - OK, red - no protection) facilitates a quick assessment of the device's condition after a surge.