Residual current device P 304 4P 25 A 30 mA type AC, DX3 series 411702

Protection and Safety of Electrical Installations

The residual current device P 304 4P 25 A 30 mA type AC from the DX³ series is a reliable protection for electrical installations, safeguarding users against electric shock and equipment against the effects of earth faults and overloads. Designed for DIN rail mounting, it provides effective protection in circuits with a rated current of 25 A. Its construction, based on proven technology, ensures stable operation and long service life.

Functionality and Applications

The residual current device P 304 is a key component for ensuring safety in residential, commercial, and industrial buildings. Designed to protect against both direct and indirect contact, it minimizes the risk of electric shock. With a sensitivity of 30 mA to differential current, the device rapidly responds to hazardous situations by disconnecting the circuit upon detection of current leakage. Compatibility with the HX³ Optimal Energy Distribution System up to 125 A facilitates integration with modern energy management systems.

Design and Key Features

The P 304 device features a robust construction and compact dimensions—occupying 4 modules on a DIN rail. Manufactured from high-quality materials, it ensures durability and resistance to environmental conditions (operating temperature range: -25°C to 60°C). It includes a lockout mechanism preventing accidental re-energizing after tripping due to protection activation. The acceptable cross-section for single-core connected conductors ranges from 0.75 mm² to 50 mm², and for multi-core conductors from 0.75 mm² to 35 mm², offering flexibility in cable selection. The rated impulse voltage withstand is up to 4 kV, indicating high resistance to voltage surges. Additionally, the device features a built-in test button for regular verification of its functionality. Its short-circuit withstand capacity (Icw) is 10 kA, guaranteeing reliability during fault conditions in the installation.