What is the rated output of the TRUs in the DC electrical system?

The rated output of the Transformer Rectifier Units (TRUs) in the DC electrical system is correctly identified as 120 amps and 28 volts. In aviation, TRUs are essential components that convert AC power into regulated DC power for various systems on the aircraft. The specification of 120 amps indicates the maximum current the TRU can supply, which is crucial for ensuring that all electrical components requiring DC power can operate effectively without risking overload or power failure. The voltage specification of 28 volts characterizes the standard operating voltage for aircraft DC systems, which is widely used across various aircraft to ensure compatibility and reliable performance for electronic systems. Compatibility with this standard is vital for the operation of avionics and other critical equipment, reinforcing why these figures are significant in the context of aviation electrical systems.