What is the principle behind a circuit breaker in aircraft electrical systems?

The principle behind a circuit breaker in aircraft electrical systems is to open the circuit when the current exceeds a certain threshold. This is crucial for protecting electrical circuits and components from damage due to overcurrent conditions, which can lead to overheating and potential fire hazards.

Circuit breakers are designed to automatically disconnect the power supply when an excessive amount of current is detected, thereby preventing damage to wiring, devices, and systems within the aircraft. This safety mechanism serves as a vital component to maintain operational integrity and ensure the safety of both the aircraft and its occupants.

While continuously allowing current flow, restricting current flow, or enhancing voltage levels might pertain to different functions within electrical systems, they do not capture the primary role of a circuit breaker, which is fundamentally about controlling current to protect against overcurrent situations.