Residual current device PR 304 4P 125 A 30 mA type AC, DX3 series 410624

Residual Current Device – Protection and Installation Safety

This four-pole residual current device PR 304 from the DX3 series is a critical component ensuring safety in electrical installations. Designed to protect against electric shock, it effectively detects and interrupts circuits in the event of earth fault or leakage current. Its robust construction and high reliability make it an ideal choice for both professional installers and end users.

Functionality and Applications

The residual current device has a rated current of 125A and is designed for operation in networks with voltage 250-440V and frequency 50Hz. The AC sensitivity of 30mA ensures rapid response to leakage currents, minimizing the risk of electric shock. Suitable for residential, commercial, and industrial installations, it guarantees a high level of operational safety. The mechanical lock prevents accidental adjustment or deactivation, which is especially important in public areas or locations requiring uninterrupted power supply.

Characteristics and Installation

The device’s design allows for DIN-rail mounting, occupying 6 modules. It supports single-core conductor cross-sections from 1.5 to 70 mm² and multi-core conductors from 1.5 to 50 mm², enabling connection to a wide range of cables. The IP20 protection rating safeguards against accidental contact and ingress of solid objects, which is essential under standard operating conditions. Designed to operate in ambient temperatures from -25°C to 70°C, it offers a universal solution even in harsh environmental conditions. Constructed from high-quality materials, it complies with safety standards and ensures long-term, fault-free operation. The C characteristic allows slower response to brief current surges, making it well-suited for starting motor-driven equipment. The rated impulse voltage withstand Uimp is 6kV, providing additional protection against voltage surges.