Residual current circuit breaker P 314 4P C 20 A 30 mA Type A, DX3 series 411235

Safety and Protection of Electrical Installations

The residual-current circuit breaker P 314 4P C 20 A 30 mA Type A from the DX³ series is a reliable device that combines the functions of an overcurrent and residual-current device. It provides comprehensive protection of electrical circuits against the effects of overloads, short circuits, and electric shocks. This is a critical component in every modern installation, ensuring safe operation and minimizing the risk of failures.

Functionality and Applications

The device is designed for protection of four-pole circuits with a rated voltage of 400 V and a rated current of 20 A. The C characteristic ensures delayed tripping during short-term overloads, which is particularly important for devices with induction motors or other loads with high inrush currents. Type A sensitivity enables detection of both alternating sinusoidal currents and pulsating direct currents, enhancing protection effectiveness against dangerous leakage currents.

This residual-current circuit breaker is suitable for residential, commercial, and industrial installations. It performs optimally wherever high reliability and effective protection of people and electrical equipment are required. Additionally, the ability to simultaneously disconnect the N conductor increases safety in case of earth fault.

Construction and Key Features

The P 314 DX³ residual-current circuit breaker features a compact design — occupying 4 modules width on a TH35 rail. It has a mechanical lock preventing accidental re-energization after tripping due to short circuit or overload. The test button allows regular verification of the residual-current mechanism’s functionality, as recommended to ensure continuous device performance. The rated short-circuit breaking capacity is up to 6 kA (according to standard EN 61009-1) or 10 kA (according to standard IEC 60947-2), ensuring effective circuit disconnection in case of severe fault. The device has an IP20 protection rating, providing protection against finger contact and solid objects larger than 12.5 mm. Additional DX³ series accessories, such as auxiliary contacts or trip units, can be installed to tailor the breaker’s functionality to specific installation needs.