Technical Overview of a Single-Module Miniature Residual Current Circuit Breaker

The JCR1-40 is a compact, single-module Residual Current Circuit Breaker with Overcurrent protection (RCBO), designed to provide comprehensive electrical safety in a space-efficient form factor. This device integrates the functions of earth leakage protection and circuit protection against overloads and short circuits into one unit. As a critical component in modern electrical installations, this Residual Current Circuit Breaker is engineered to safeguard circuits, equipment, and personnel, making it suitable for a diverse range of applications including residential, commercial, and industrial distribution boards.

This particular Residual Current Circuit Breaker is distinguished by its advanced electronic trip mechanism and versatile operational characteristics. It offers a standard breaking capacity of 6 kA, which can be upgraded to 10 kA to suit different system requirements. The unit is available with a wide range of rated currents, from 6A up to 40A, providing flexibility for various load profiles. It offers a choice between B and C tripping curves, allowing for selective coordination with other protective devices in the electrical network to ensure optimal discrimination during fault conditions.

A key feature of this device is its sophisticated residual current protection. It is available in multiple sensitivity ratings30mA, 100mA, and 300mA catering to different protection scenarios, from personal shock prevention to equipment fire hazard mitigation. The breaker also comes in different types of residual current operation, specifically A-Type or AC-Type, ensuring compatibility with various forms of pulsating or smooth DC fault currents that may be present in modern electrical systems with electronic loads.

The design incorporates significant practical innovations, most notably the line and neutral switching functionality. This dual-pole switching ensures complete isolation of the faulty circuit, enhancing safety for maintenance personnel. The neutral pole switching feature is particularly beneficial as it significantly reduces the time required for installation, wiring, and subsequent functional testing, thereby improving efficiency for electricians and reducing overall project time.

This single-module miniature Residual Current Circuit Breaker represents a sophisticated and user-friendly solution for integrated circuit protection. Its combination of a compact design, configurable protection parameters, and time-saving features like line and neutral switching makes it a reliable and efficient choice for modern electrical installations. Compliance with international standards such as IEC 61009-1 and EN61009-1 guarantees that it meets rigorous safety and performance benchmarks, ensuring dependable operation in its intended applications.