Surge arrester for high-voltage applications, T1+T2, 400V AC, Imax: 100 kA, Uc: 440V AC RSP-EH25/100-440/11 2617374

Surge protection for high-voltage installations

The RSP-EH25/100-440/11 surge arrester is an advanced device designed to protect electrical installations from the effects of voltage surges and overvoltages, especially those caused by lightning strikes. Class T1+T2 construction provides comprehensive protection, combining the features of first and second level arresters, making it an ideal solution for facilities exposed to direct lightning strikes or induced overvoltages.

This arrester is particularly recommended for use in installations with a rated voltage of 400V AC. It utilizes advanced protection technology, adapted to different circuits – both L-N (phase-neutral) and N-PE (neutral-protective earth). The L-N circuit uses a combination of varistors (MOV), Zener diodes (GDT), and thermal overload protection (TOV), guaranteeing reliable operation even under prolonged loads. The N-PE circuit is protected by GDT diodes, providing effective protection against differential overvoltages.

Additionally, the arrester is equipped with a potential-free contact, which allows for remote signaling of its status – informing about possible damage and the need for replacement. Compact dimensions (36mm per pole) allow for easy installation even in limited space within a distribution board.

Parameters and application

The device is characterized by high strength parameters: the maximum surge current Imax is as high as 100kA, guaranteeing effective protection even with very strong overvoltages. The rated discharge current is 25kA for L-N and 50kA for N-PE. Peak currents Iimp are 22kA (L-N) and 50kA (N-PE), respectively. These parameters make the arrester perfect for industrial buildings, commercial facilities, data centers, and anywhere high reliability and protection of sensitive electronic devices are required.

The use of the RSP-EH25/100-440/11 arrester translates into increased safety of using the electrical installation and minimizing the risk of failures caused by overvoltages. It protects not only the installation itself, but also the devices connected to it – such as servers, computers, control systems or lighting – from damage and downtime. Therefore, investing in this arrester is an investment in the continuity of operation and safety of the entire system.