Residual current device PR 302 2P 40 A 30 mA Type A DX3 series 410428

Safety and Protection in Your Electrical Installation

The residual current device (RCD) PR 302 2P 40A 30mA Type A from the DX3 series is a critical component ensuring safe operation of electrical installations. This device effectively protects against electric shock and safeguards against the consequences of earth faults, significantly reducing the risk of fire. This is especially important in residential spaces, offices, and any location requiring high levels of protection for people and property.

Functionality and Applications

The RCD PR 302 is designed for protection of circuits with a rated current of 40A. Its 30mA sensitivity ensures rapid response to leakage currents, which is essential for human life protection. Type A indicates that the device detects both sinusoidal and pulsating DC leakage currents at 50/60Hz — ideal for most residential and commercial applications. DIN rail mounting simplifies integration into existing distribution boards. The built-in lock prevents accidental tripping, enhancing installation safety.

Construction and Operating Parameters

The device has been engineered for reliability and durability. The IP20-rated enclosure protects against finger contact and ingress of solid objects larger than 12.5 mm. The device width is 2 modules (35.6 mm), enabling efficient use of space in the distribution board. Conductors with cross-sections from 1.5 mm² to 35 mm² (multi-core) and from 1.5 mm² to 50 mm² (single-core) can be easily connected via screw terminals or busbar connectors. The device maintains proper operation across a wide ambient temperature range: from -25°C to 70°C. The rated impulse voltage withstand (Uimp) reaches up to 4 kV, ensuring robust protection against voltage surges.

• Rated current: 40A – ensures protection for circuits with appropriate load.
• Sensitivity: 30mA – guarantees rapid response to leakage currents and minimizes shock risk.
• Type A: Detects both sinusoidal and pulsating leakage currents, providing comprehensive protection.
• IP20 protection rating: Protects against finger contact and ingress of solid objects.
• Locking mechanism: Prevents accidental tripping of the device.
• Width: 2 modules – saves space in the distribution board.
• Operating temperature range: -25°C to +70°C – suitable for use in diverse environmental conditions.