What is the purpose of fuses and circuit breakers in aviation?

The purpose of fuses and circuit breakers in aviation is fundamentally centered around safety and protection for electrical systems. These components are designed to prevent electrical equipment from overheating and potentially causing fires or damage. In the event of an overload or short circuit, fuses will melt, and circuit breakers will trip, disconnecting the faulty circuit from the power source. This instant reaction helps to mitigate risks associated with excessive current flow, thereby safeguarding both the aircraft and its crew.

Fuses and circuit breakers serve as crucial devices to ensure that circuits operate within their specified parameters. By interrupting the electrical flow during abnormal conditions, they help maintain the integrity of the electrical system, protect sensitive avionics, and ensure the overall safety of the flight operation. Their primary function is not to enhance efficiency, facilitate upgrades, or regulate voltage output, but rather to act as protective measures against overheating and electrical failures.