Residual current device P 304 4P 63 A 30 mA type AC, DX3 series 411704

Safety and Protection in Your Electrical Installation

This four-pole residual current device (RCD) from Legrand’s DX³ series is a critical component ensuring safety in every circuit. Designed to protect against electric shock and fire hazards, it provides a reliable barrier in the event of a ground fault. Its operation is based on rapid detection of current imbalances, minimizing risks to people and property.

With a rated current of 63A and sensitivity of 30mA (Type AC), this device performs excellently in both residential and industrial installations. Type AC indicates effective response to sinusoidal alternating residual currents—the most common type found in standard electrical circuits. DIN rail mounting (TH35) simplifies integration into existing electrical systems.

Functionality and Compatibility

The P 304 4P RCD is compatible with the HX³ Optimal Power Distribution System up to 125A, enabling wireless connection to electrical installations. Expandability with additional accessories—such as auxiliary contacts or trip units—enhances functionality and allows customization to meet specific installation requirements. The mechanical lock prevents accidental switching during maintenance work.

Note the wide range of permissible conductor cross-sections: 0.75 mm² to 50 mm² for single-core cables and 0.75 mm² to 35 mm² for multi-core cables, ensuring flexibility when connecting various cable types. With a short-circuit withstand rating of 10 kA, it guarantees reliable operation even under severe overcurrent conditions.

Design Features and Specifications

The RCD features a robust construction and high manufacturing quality, confirmed by compliance with EN 61008-1. The housing, with a width of 4 modules (71.2 mm), ensures compact dimensions, while IP20 protection guards against finger contact and solid objects larger than 12mm. Operating temperature range: -25°C to +60°C, enabling use in diverse environmental conditions. Rated insulation voltage Ui: 500V; rated impulse withstand voltage Uimp: 4kV—ensuring safe operation.