Residual current device P 304 4P 80 A 500 mA type AC, DX3 series 411735

Safety and Protection in Your Electrical Installation

This four-pole residual current device (RCD) P 304 from the DX3 series by Legrand, with a rated current of 80A and 500mA sensitivity, type AC, is a critical component ensuring user safety and protection against electric shock and fire hazards. Its use in electrical installations is essential for both comfort and safety.

Functionality and Applications

The RCD P 304 is designed to protect people and equipment in electrical circuits. Thanks to its sensitivity to leakage currents, it rapidly responds to hazardous situations by disconnecting power upon detection of a short circuit or insulation failure. The AC type indicates that the device effectively detects sinusoidal alternating residual currents—the most common type found in residential and industrial installations. The 4-module width facilitates easy mounting in distribution boards.

Design and Installation

The device is designed for DIN-rail mounting, ensuring fast and simple installation and removal. Constructed from high-quality materials, it guarantees reliable operation even under demanding conditions (ambient temperature range: -25°C to 60°C). The mechanical lock prevents accidental re-energizing after tripping due to protection activation. It supports conductor connections ranging from 0.75 mm² to 50 mm² (single-core) or 35 mm² (multi-core), offering flexibility in cable selection. The rated impulse voltage withstand (Uimp) is 4 kV, enhancing resistance to voltage surges.

Key Features and Benefits:

• High short-circuit withstand capacity: Short-circuit endurance (Icw) of 10 kA ensures effective protection of the installation against short-circuit consequences.
• Wide application range: Rated current of 80A allows use in circuits with higher power demand.
• Compatibility with HX³ system: Integration capability with the HX³ Optimal Energy Distribution System up to 125 A simplifies connection to modern electrical installations.
• Test button: Built-in test button enables regular verification of proper device operation, crucial for continuous protection.
• Expandability: Compatibility with DX³ series accessories (auxiliary contacts, trip units) allows customization of functionality to meet specific installation needs.
• Safety certified to standards: Compliance with EN 61008-1 guarantees high levels of safety and reliability.
• Durable construction: Made from high-quality materials, ensuring long-term, fault-free operation.