Residual current device with network analyzer PR 304 4P 125 A, adjustable 30-3000 mA, Type F (HPI), DX3 series 410659

Advanced protection and monitoring with Legrand DX3 residual current device

This four-pole residual current device PR 304 with a rated current of 125A is an advanced solution for electrical installations requiring high levels of safety and precise monitoring. Equipped with a network analyzer, it not only provides effective protection against electric shock and short circuits but also delivers valuable data on installation operating parameters. Adjustable residual current settings from 30-3000 mA ensure flexibility and customization to specific application requirements.

Functionality and applications

The residual current device with integrated network analyzer is suitable for a wide range of installations—from residential to industrial. It performs optimally wherever protection of people and equipment against leakage currents and short circuits is essential. The network analyzer enables monitoring of key parameters, facilitating diagnostics and optimization of installation performance. Rated voltage of 250-440V and frequency of 50 Hz guarantee compatibility with most standard electrical installations.

Design features and benefits

• Adjustable residual current: Precise setting of residual current values (30-3000 mA) allows optimal adaptation to load characteristics and safety requirements.
• Network analyzer: Integrated analyzer provides real-time data on installation parameters, simplifying diagnostics and maintenance.
• High immunity to interference: Type F characteristic ensures reliable protection against unwanted tripping caused by electromagnetic disturbances.
• Lockout function: Prevents accidental activation or adjustment changes, enhancing operational safety.
• Wide operating temperature range: Operation possible from -25°C to 70°C, making it suitable for demanding environmental conditions.
• Large conductor cross-section support: Accepts single-core conductors up to 70 mm² and multi-core conductors up to 50 mm², simplifying installation and ensuring reliable connections.
• Surge protection: Rated impulse withstand voltage Uimp of 6 kV provides additional protection against damage from voltage surges.
• IP20 protection rating: Protects against finger contact and solid objects larger than 12.5 mm—standard protection for devices installed in enclosures.
• Time-delayed tripping: Adjustable time delay prevents unnecessary tripping due to transient overloads or inrush currents during motor startup.

This residual current device is not only a protective element but also a diagnostic tool that supports efficient electrical energy management and ensures safe operation of installations.