Residual current device P 304 4P 40 A 500 mA type AC, DX3 series 411733

The DX³ series residual current device provides reliable protection for electrical installations, safeguarding both users and equipment against the effects of short circuits and leakage currents. The P 304 4P model, rated at 40 A and with a sensitivity of 500 mA, type AC, is designed for use in circuits requiring protection against electric shock and fires caused by earth faults.

Protection and functionality in practice

This four-pole device (4P) is engineered for use in 400 V~ systems. Its construction complies with EN 61008-1 standard, ensuring safety and reliable operation. The device responds to AC-type differential currents – sinusoidal alternating currents – making it effective in detecting hazardous leakage currents. The 40 A rated current makes it suitable for protecting medium-load circuits in both residential and commercial applications.

Installation and compatibility

The device is mounted on a DIN rail, facilitating seamless integration with existing electrical infrastructure. Its compact dimensions – 4 modules wide – allow efficient use of space in distribution boards. The device is compatible with the HX³ Optimal Power Distribution System up to 125 A, enabling wireless connection to the electrical system. Additionally, the option to equip it with auxiliary contacts and other DX³-series accessories extends its functionality, allowing customization to specific installation requirements.

Design features and additional information

The device features a test button for regular verification of proper operation. Its mechanical lock provides enhanced safety during maintenance or repair work. The housing is constructed from high-quality materials resistant to mechanical damage and environmental factors (operating temperature range: -25°C to 60°C), ensuring long-term, fault-free performance. The rated impulse voltage withstand (Uimp) is 4 kV, and the impulse current withstand is 0.25 kA, confirming its high quality and reliability under demanding operating conditions. The short-circuit withstand capacity (Icw) is 10 kA, ensuring protection against the consequences of short circuits.