What happens to the AC STBY BUS after the RAT deploys?

The AC STBY BUS connects to the AC ESS BUS after the RAT (Ram Air Turbine) deploys. This connection is crucial for maintaining electrical power to essential systems during an emergency situation, particularly when the main power sources are lost. The RAT generates power to support the AC ESS BUS, which supplies crucial services necessary for the safe operation of the aircraft. This configuration ensures that important systems remain operational, allowing for continued functionality and safety in flight despite the loss of primary power sources.

Maintaining power to the AC STBY BUS through this connection is vital since it allows the aircraft's backup systems to function properly, contributing to the overall reliability and safety of the aircraft's operations during critical situations.