Surge protective device type T1+T2, 1+NPE, Iimp: 12.5 kA (10/350), In: 30kA (8/20), Imax: 60kA, Uc: 255V AC RSP-T1T2-AC 12.5/1+NPE 2617123

Professional surge protection for AC installations

The T1+T2 surge arrester RSP-T1T2-AC 12.5/1+NPE is an advanced protective device designed in accordance with IEC 61643-11:2011. Its varistor-spark gap construction provides comprehensive protection for low-voltage equipment against atmospheric discharges and surges in single-phase installations with an additional protective conductor.

Operating parameters and performance

The device features a maximum continuous operating voltage Uc = 275 V AC, enabling safe operation in standard residential and industrial installations. The nominal discharge current In = 30 kA (8/20 μs) ensures effective protection against typical surges, while the maximum discharge current Imax = 60 kA guarantees resilience under extreme overload conditions.

The impulse current Iimp = 12.5 kA (10/350 μs) allows safe dissipation of energy from direct atmospheric discharges. The protection level Up ≤ 2 kV effectively limits voltage to a safe value for protected electronic equipment.

Construction and installation

The compact housing occupies 2 modules on a standard 35 mm DIN rail, facilitating installation in electrical distribution boards. The device supports various connection types: rigid single-core and multi-core cables up to 35 mm², and flexible multi-core cables up to 50 mm².

Optical signaling indicates the device status and potential wear of protective components. The TOV withstand capability of Ut = 355 V provides additional resistance to temporary overvoltages.

Application and compatibility

The 1+NPE configuration is ideal for single-phase installations with an additional protective conductor PE. The device is designed according to the lightning protection zone concept for LPZ (Lightning Protection Zone) areas from 0 to 1, making it a universal solution for both residential buildings and commercial facilities.

A response time not exceeding 100 ms ensures rapid reaction to emerging surges, minimizing the risk of damage to protected equipment. The blow-out signaling mechanism enables easy monitoring of the device's technical condition during operation.