How many onboard sources of AC power are available?

How many onboard sources of AC power are available?

• A. Three
• B. Five
• C. Six
• D. Four

Answer: (B)

AC power on the A320 is provided by multiple onboard sources to ensure essential systems stay powered even if one source fails. There are two engine-driven generators, one on each engine, delivering main AC power. In addition, an APU generator provides another onboard AC source. Then, there are two AC inverters that convert DC power from the aircraft’s DC system into 115V AC at 400 Hz to supply power when the main sources aren’t available. Counting these gives five onboard sources of AC power. External ground power is not included in this onboard count, and emergency devices like a ram air turbine aren’t part of the normal onboard sources count.

AC power on the A320 is provided by multiple onboard sources to ensure essential systems stay powered even if one source fails. There are two engine-driven generators, one on each engine, delivering main AC power. In addition, an APU generator provides another onboard AC source. Then, there are two AC inverters that convert DC power from the aircraft’s DC system into 115V AC at 400 Hz to supply power when the main sources aren’t available. Counting these gives five onboard sources of AC power. External ground power is not included in this onboard count, and emergency devices like a ram air turbine aren’t part of the normal onboard sources count.