Surge arrester type T1+T2, 1 pole, Limp: 7 kA (10/350), In: 20kA (8/20), Imax: 50kA, Uc: 275V AC RSP-T1T2-AC 7/1P 2617125

### Protection of electrical installations against overvoltage

This T1+T2 surge arrester is a key element of every electrical installation exposed to the effects of lightning strikes and overvoltages. It provides comprehensive protection for electrical devices, minimizing the risk of damage and downtime. This is particularly important in places where uninterrupted power supply is critical.

This arrester combines the features of T1 and T2 arresters, which means it effectively suppresses both strong current impulses from direct lightning strikes (T1) and less intense but more frequent overvoltages (T2). The single-pole design makes it ideal for protecting individual circuits.

Characteristics and application

Varistor-spark gap design ensures a fast response to overvoltages. The peak current Limp at 7 kA (10/350 μs) guarantees effective protection against sudden voltage surges, and the ability to withstand an impulse with a value of 50 kA (Imax) makes it a reliable protection even in the event of strong discharges. The maximum continuous operating voltage Uc of 275V AC allows it to be used in standard electrical installations.

• Application: The arrester is designed to protect low-voltage devices in AC installations.
• Protection concept: Ideal for use in accordance with the zone protection concept in LPZ 0-1.
• Compliance with standards: Designed and manufactured in accordance with the requirements of IEC 61643-11:2011, which confirms its high quality and reliability.

Key parameters and benefits

• Peak current (Iimp): 7 kA (10/350 μs) – high resistance to short-term current surges.
• Rated discharge current (In): 20 kA (8/20 μs) – ability to dissipate energy from frequent overvoltages.
• Maximum discharge current (Imax): 50 kA – high resistance to strong current impulses.
• Continuous operating voltage (Uc): 275 V AC – compatibility with most electrical installations.
• Protection level (Up): ≤ 1.5 kV – ensures effective limitation of the voltage to a safe level.
• Response time: ≤ 100 ms – fast response to overvoltages minimizes the risk of damage.
• TOV withstand (5 s): 355 V - resistance to prolonged increase in mains voltage.

Thanks to these parameters, this arrester provides a reliable protective barrier for sensitive electronic devices, ensuring their long-term and trouble-free operation. Installing this type of arrester is an investment in the safety of the entire electrical installation and the receivers connected to it.