Residual current device PR 304 4P 40 A 300 mA type AC, DX3 series 410511

Safety and Protection in Your Electrical Installation

The residual current device PR 304 4P 40A 300mA AC from the DX3 series is a critical component ensuring the safe operation of electrical installations. Manufactured by Legrand, this device protects against electric shock and prevents fires caused by earth fault currents. It is indispensable in both new installations and during the modernization of existing systems.

Functionality and Technical Parameters

This residual current breaker, rated at 40A and with a sensitivity of 300mA (AC), is designed for use in circuits with a nominal voltage of 250-440V and a frequency of 50Hz. The four-pole construction provides comprehensive protection. The use of AC characteristic ensures effective response to sinusoidal leakage currents, typical of most electrical appliances. The locking mechanism prevents accidental re-energizing of the circuit after tripping, enhancing operational safety.

Installation and Application

Installation is performed on a standard DIN rail, facilitating seamless integration into existing distribution boards. It accepts single-core conductors with cross-sections from 1.5 to 35 mm² and multi-core conductors from 1.5 to 25 mm². The device width is 4 modules (71.2 mm), enabling efficient use of space in the distribution cabinet. Connection options include comb busbars or pin terminals, offering installation flexibility. The device complies with EN 61008-1 standards, guaranteeing reliability and conformity with applicable regulations. Operating ambient temperature ranges from -25°C to 70°C, allowing use in diverse environmental conditions.