The Remote Control Circuit Breaker (RCCB) by Crouzet is a groundbreaking innovation in the aviation industry. By combining the functions of a circuit breaker and a contactor in a single unit, the RCCB significantly enhances energy management and electrical system reliability on aircraft. This high-performance device is essential for controlling and protecting various critical electrical systems, including electro-hydraulic actuators (EHA and EBHA), in-flight entertainment systems, and galley equipment

Key Features of the RCCB

1. Advanced Energy Consumption Optimization

One of the RCCB’s primary advantages is its ability to power only essential loads. By reducing unnecessary energy consumption, it helps lower the aircraft’s overall power demand, contributing to improved fuel efficiency and sustainability.

2. Dual Functionality: Circuit Breaker and Contactor

The RCCB integrates two essential functions:

•    Contactor Function: When a 28V control voltage is applied, the RCCB closes its circuit, allowing current to flow and power connected loads.
•    Circuit Breaker Function: The RCCB protects the electrical system by automatically disconnecting in the event of an overload, short circuit, or fault condition.

3. Exceptional Reliability and Durability

•    Designed for 100,000 switching cycles, ensuring long operational life.
•    Rated for at least 50,000 flight cycles (takeoff and landing), making it ideal for long-term use in commercial and military aviation.
•    Built with high-performance contacts:
o    Tungsten mobile contact: Closes first and opens last, minimizing arcing and enhancing durability.
o    Silver contact: Ensures low voltage drop and excellent conductivity during steady-state operation.

4. Enhanced Safety Features 

•    Mechanical Trip Indicator: Provides clear visual feedback on circuit status, improving maintenance efficiency.
•    Status Display Window: Allows quick verification of the RCCB’s operational state.
•    Low Contact Resistance: Reduces heat generation and improves overall system safety.

RCCB Applications in Aviation

This device is an integral part of multiple aircraft subsystems, playing a crucial role in ensuring safe and efficient operations:

1. Flight Control Systems

•    Powering primary flight control actuators, including spoilers, ailerons, and rudders.
•    Supporting Electro-Hydraulic Actuators (EHA) and Electro-Backup Hydraulic Actuators (EBHA), crucial for redundancy and safety in modern fly-by-wire aircraft.

 2. Aircraft Door and Cargo Systems

•    Controlling cargo bay door actuation motors.
•    Managing power supply for emergency access systems.

3. Cabin and In-Flight Entertainment Systems

•    Powering In-Flight Entertainment (IFE) systems, ensuring uninterrupted operation for passenger entertainment.
•    Supplying power to galley feeders, allowing efficient operation of food and beverage equipment.

The Remote Control Circuit Breaker (RCCB) by Crouzet is a technologically advanced solution tailored for modern aviation. Its integration of contactor and circuit breaker functions, coupled with its exceptional reliability and safety features, makes it an indispensable component for aircraft manufacturers and operators. By optimizing energy management, reducing maintenance, and enhancing overall safety, the RCCB sets a new benchmark in aircraft electrical system design.