Surge arrester type T1+T2, 4 poles, 230V AC, Iimp: 7.5kA (10/350), Imax: 50kA (8/20) RSP-E7.5-40 2617379

Electrical installation protection with surge limiters

This four-pole surge limiter of the RSP-E7.5 series is a key element in protecting the electrical installation from the effects of surges and lightning strikes. Designed for use with 230V AC networks, it provides effective protection for both residential and industrial installations. Class I+II (T1+T2) construction provides comprehensive protection, responding to both direct lightning strikes and disturbances from the power grid.

Construction and application

The limiter uses MOV (Metal Oxide Varistor) technology in combination with a potential-free contact, which enables remote monitoring of the device status. This is extremely useful in monitoring and remote control systems, allowing for a quick response in the event of a failure. The plug-in design simplifies installation and replacement, minimizing installation downtime. It is ideal for use in auxiliary distribution boards (SB), providing effective protection at the building entrance or in places with an increased risk of exposure to surges. It will work in TT, TN-S and TN-C networks.

Key features and benefits

• High protection efficiency: Peak current 7.5kA (10/350) and maximum discharge current 50kA (8/20) guarantee effective protection against even strong surges.
• Versatility: Designed for three-phase “4+0” networks with a Uc voltage of 275V AC.
• Status indication: Potential-free contact enables remote monitoring of the limiter status – informs about the need for replacement after a surge.
• Easy installation: Plug-in design significantly simplifies installation and replacement of the device, saving time and labor costs.
• Compliance with standards: Meets the requirements of IEC/EN 61643-11:2011, IEC 60364-4-53 and IEC 62305 standards, which confirms its safety and reliability.
• Compact dimensions: Allow mounting in a limited space of the distribution board.
• Optical indicator: Green/red flag allows for a quick visual assessment of the device status – whether it is working correctly or needs to be replaced.

The maximum continuous operating voltage is 275 V AC, the rated discharge current is 20 kA (8/20 μs), and the maximum discharge current reaches a value of 50 kA (8/20 μs). The protection level U is 1.2 kV, and the response time is less than or equal to 25 Ns.

The RSP-E7.5-40 surge limiter is an investment in the safety and reliability of the electrical installation, protecting valuable equipment from damage caused by surges. It provides peace of mind for both installers and end users.