Final answer:
The RAT automatically deploys when there is a significant loss of electrical power, such as the failure of both primary and standby electrical systems, if the MAN ON switch is in AUTO mode.
Step-by-step explanation:
The question is about the Emergency Electrical Power Panel and, in particular, the conditions for the automatic deployment of the Ram Air Turbine (RAT) when the MAN ON switch is in AUTO mode. In an aircraft, the RAT will automatically deploy when there is a significant loss of electrical power, in order to provide emergency power by harnessing airflow to turn a turbine generator. This might occur, for example, if both the primary and standby electrical systems fail. In AUTO mode, the system is designed to monitor the aircraft's power status and deploy the RAT autonomously to ensure that critical systems remain powered.
In an emergency electrical power panel, when the guarded MAN ON switch is in AUTO mode, the RAT (Ram Air Turbine) automatically deploys when there is a loss of normal electrical power. The RAT serves as a backup power source by extracting energy from the airflow of the aircraft. It is designed to provide power for essential systems during emergencies, such as when all engines fail or in the event of an electrical failure.