Residual current device PR 303 3P 125 A 30 mA Type F (HPI) DX3 series 410606

Residual Current Device – Protection and Installation Safety

The PR 303 residual current device from the DX3 series is a reliable component designed to protect electrical installations against the effects of short circuits and electric shocks. Intended for the protection of people and equipment, it ensures a high level of safety in homes, commercial buildings, and industrial environments. This model, with a rated current of 125A and sensitivity of 30mA, is ideal for circuits requiring effective protection against electric shock.

Design and Application

The three-pole residual current device PR 303 features a compact design that enables easy mounting on a TH35 rail. Its robust construction guarantees long-term, fault-free operation even under harsh environmental conditions—from -25°C to 70°C. The device is equipped with a lock to prevent accidental adjustment of settings. The use of characteristic F ensures rapid response to earth leakage currents, minimizing the risk of electric shock.

Key Features and Benefits

• High Protection Efficiency: 30mA sensitivity ensures immediate circuit disconnection upon detection of leakage current, protecting users from electric shock.
• Wide Voltage Range: Operation from 250V to 440V AC makes the device universal and suitable for various types of electrical networks.
• High Immunity to Interference: Protection against unintended tripping minimizes the risk of false alarms and unnecessary system downtime.
• Robust Construction: Made from high-quality materials, ensuring durability and reliability.
• Easy Installation: Compact dimensions and TH35 rail mounting simplify installation and servicing.
• Locking Mechanism: Prevents unauthorized or accidental adjustment of settings.
• Designed for High Loads: Rated current of 125A allows protection of circuits with higher power demand.

The PR 303 residual current device is an investment in the safety and reliability of electrical installations—for both professionals and end users. Its robust design, high operational efficiency, and ease of installation make it the ideal choice for any electrical project.