Applications : 

Key features and design strategies :

• Highly integrated designs for significant weight and volume savings.
• AC and DC secondary distribution utilizing electromechanical and/or solid state power switching devices
• High integration of current sensing functions
• Assemblies and subassemblies designed as LRUs for ease of replacement
• Modular concepts for flexibility, reduced cost, easy reconfiguration and future requirements
• Distributed or integrated architecture to optimize electrical power system performance, safety and reliability
• Strategically integrated connections to associate secondary distribution assemblies with primary distribution assemblies
• Choice of technical solutions based on standard circuit breakers or solid state power controllers

Advanced features for relay panels include :

•  Full integration of hermetically sealed relays onto a PCB
• 2A-, 5A-, 10A- and 25A- ratings ; low level to 110VDC network voltage
• 1-, 2-, 3-, 4-, or 6-pole relays
• Sockets available for easy relay removal
• Use of separated transient suppression devices (PCB mounting or plug-in sockets) and other electronic components (e.g. diodes)
• Time delay relay integration (PCB mounting or plug-in sockets)
• Flexible technical approach allows for easy change or modifications of schematics
• Relay panels designed as LRUs for ease of replacement

Additional features for circuit breaker panels include :

• Fully integrated circuit breakers on panels for space and weight savings
• Panel plug-in concept to the primary distribution or separated panels for cockpit installation
• PCB plug-in circuit breakers for cost reduction and easy maintenance
• Circuit breaker status reporting using communication buses such as CAN, ARINC, or others

Advanced electronic features for SSPCs include :

• "Design-to-safety" electronics i.e., optimized architecture to achieve the safety objectives of the equipment specifications
• BITE features such as Fully Automatic Power On Built-in-Test (PBIT), Continuous Built-in-Test (CBIT) and Initiated Built-in-Test (IBIT)
• Accurate I²t over-current and short circuit protection with thermal memory and fully compliant (or better than) thermal circuit breaker trip curve
• Reprogrammable trip curves
• Various communication buses (ARINC 429, CAN, RS422/485, MIL-STD-1553, Ethernet buses, etc.) for internal use, and for communication with man/machine interface, aircraft central computer, and other aircraft equipment
• Load reporting and management such as load shedding, soft start for specific loads (light), and current measurement
• Zero voltage turn-on and turn-off (AC device)
• Synchronization between 3 phases for AC SSPCs (any phase trip will trip all phases)
• Current threshold and delay for actuator overload protection
• Programmable time delay on operate or release
• Fail-safe functions
• Optional arc fault detection
• Very low heat dissipation using solid state technology