Simplicity: 28V DC systems are relatively simple to generate, distribute, and use. The system requires only a source of DC power (e.g., batteries or a generator) and DC wiring to distribute the power to different components. This simplicity makes it easier to design, maintain, and troubleshoot the electrical system of an aircraft.
Reliability: 28V DC systems are known for their reliability in various operating conditions. DC systems are less susceptible to voltage fluctuations and electrical noise compared to AC systems. This reliability is crucial in aircraft where electrical failures can have severe consequences for safety.
Weight and space efficiency: 28V DC systems require smaller wires due to the lower current levels compared to AC systems. This reduces the weight of the electrical wiring and saves valuable space within the aircraft.
Compatibility with electronic devices: Many electronic devices used in aircraft, such as avionics, navigation systems, and communication systems, are designed to operate on a 28V DC power supply. This compatibility simplifies the integration of various electrical components into the aircraft's electrical system.
Standardization: The use of 28V DC power systems has become a standardized practice in the aviation industry. This standardization ensures that electrical components, equipment, and tools used in aircraft are compatible and interchangeable, simplifying maintenance and operations.
While 28V DC systems offer several benefits, some modern aircraft may use higher voltage DC systems (e.g., 115V DC) or AC systems for specific reasons, such as improved efficiency, power requirements, or integration of advanced electrical technologies.
