Residual current device P 304 4P 63 A 100 mA Type A DX3 series 411771

The DX³ series residual current device is a reliable protection for electrical installations, safeguarding users and equipment against electric shock and preventing fires. The P 304 model, a four-pole device with a rated current of 63 A and 100 mA sensitivity of type A, performs excellently in both residential and public utility installations.

This residual current device is part of Legrand’s comprehensive DX³ protection range, characterized by high manufacturing quality and compliance with the latest safety standards. Its lockout feature prevents accidental re-energization after tripping, providing additional protection against unauthorized use.

Functionality and Application

The P 300 DX³ devices are compatible with the HX³ Optimal Power Distribution System up to 125 A, enabling wireless connection to electrical installations—this solution simplifies installation and allows flexible adaptation to specific needs. These devices are compatible with various auxiliary equipment, such as auxiliary and signaling contacts, undervoltage releases, and remote actuators, enhancing system functionality. Designed for DIN rail (TH35) mounting, it occupies 4 module widths.

Design Features and Specifications

The P 304 residual current device features a robust construction and high resistance to environmental conditions. It is rated for operation in ambient temperatures from -25°C to 60°C and has an IP20 protection rating, ensuring reliable performance even under harsh conditions. The rated insulation voltage (Ui) is 500 V, and the rated impulse withstand voltage (Uimp) is 4 kV. The short-circuit withstand capacity (Icw) is 10 kA, guaranteeing effective protection in the event of a short circuit. The connected conductor cross-section ranges from 0.75 mm² to 50 mm² for single-core cables and from 0.75 mm² to 35 mm² for multi-core cables.

The type A residual current device responds to both alternating sinusoidal and pulsating direct residual currents—this is critical for ensuring safety in the event of faults involving electronic devices that generate such disturbances. It includes a test button for regular functional verification.