Surge Protector PRD1 25r 3P+N

The Schneider Electric PRD1 25r 3P+N surge arrester, part of the Multi9 range, is an essential device for protecting electrical installations against the destructive effects of lightning and surges. This model is specifically designed for electrical distribution networks in TT and TN-S earthing systems, ensuring equipment safety and installation stability.

This surge arrester is type 1 and 2, meaning it offers protection against both direct lightning strikes and surges induced by electrical operations. With a nominal discharge current of 25kA (8/20 µs impulse) and a maximum current of 40kA, it is capable of handling high energy levels, providing robust and reliable defence for industrial, commercial, or residential environments. Additionally, its ability to handle up to 100kA of current in common mode (between neutral and earth) ensures comprehensive protection against severe electrical discharges.

This device stands out for its modular design, allowing easy mounting on a DIN rail, facilitating installation in electrical cabinets. The PRD1 25r arrester consists of 16 modules of 9 mm, ensuring compatibility with most modular electrical panels. Its IP20 protection rating at the terminals, which can reach IP40 when mounted in a cabinet, makes it suitable for enclosed environments and protects against accidental contact and dust. Furthermore, it features an IK05 impact protection level, offering mechanical resistance to shocks.

One of the most practical features of this surge arrester is its pluggable and replaceable cartridge, which facilitates maintenance without the need to dismantle the entire device. This significantly reduces downtime and ensures the system is continuously protected. The cartridge status indicator provides a clear visual reference for the user: when the device is in good condition, the indicator is white; when it has reached the end of its service life, it turns red, indicating the cartridge needs replacement. Additionally, it includes integrated remote signalling (1 SD with changeover contacts) that allows monitoring of the device status remotely, which is essential in large installations or in hard-to-reach locations.

Key technical specifications:

• Maximum continuous operating voltage (Uc): 350 VAC in both differential mode (L-N) and common mode (N-PE).
• Nominal discharge current (8/20 µs): 25 kA, with a maximum capacity of 40 kA.
• Maximum lightning current (Iimp): 25 kA between L-N and 100 kA between N-PE, providing effective protection against direct lightning.
• Voltage protection level: Up to 1.5 kV, ensuring surges are clipped to safe levels for the installation.
• Standards: Complies with IEC/EN 61643-11 standards, ensuring the product meets international quality and safety standards.
• Protection rating: IP20 at terminals (IP40 in cabinet), resistant to mechanical impacts with IK05 classification.
• Mounting: DIN rail for quick and easy modular installation.

This surge arrester is KEMA-KEUR certified and CE marked, ensuring it meets the quality and safety requirements of the European Union. With its robust and modular design, the Schneider PRD1 25r 3P+N is a reliable choice for protecting both small and large electrical installations. Furthermore, its remote signalling capability and easy maintenance make it a very practical device for electrical professionals.