Residual current device PR 304 4P 40 A 30 mA type AC, DX3 series 410499

Safety and Reliability in Your Electrical Installation

The residual current device PR 304 4P 40A 30mA AC from the DX3 series is a critical component ensuring protection of people and equipment in electrical installations. The device effectively detects leakage currents, minimizing the risk of electric shock and equipment damage. This is especially important in high-humidity areas such as bathrooms and kitchens, as well as in circuits powering electrical devices susceptible to insulation degradation.

Functionality and Installation

The residual current device is designed for mounting on a TH35 rail, simplifying integration into existing distribution boards. Its compact dimensions (4 modules) save valuable space. Wire connections are made via screw terminals that accept single-core cables with cross-sections from 1.5 to 35 mm² and multi-core cables from 1.5 to 25 mm². A locking mechanism prevents accidental tripping, enhancing operational safety.

Specifications and Applications

The device features a rated current of 40A and sensitivity to AC leakage currents of 30mA, meaning it responds to alternating leakage currents typically caused by insulation faults. It is intended for protection of circuits with a rated voltage of 250 to 440V at 50Hz. The IP20 protection rating guards against finger contact but does not provide protection against water. The device withstands a rated impulse voltage of up to 4kV, ensuring resilience against voltage surges. Operation is guaranteed across a wide ambient temperature range (-25°C to +70°C), enabling use in diverse environmental conditions. The device complies with the NF EN 61009-1 standard, confirming its safety and conformity with European regulations.