Question

ELECTRIC PANEL: What is the AC Bus power priority order?

A) AC Bus 1, AC Bus 2
B) AC Bus 2, AC Bus 1
C) Essential Bus, AC Bus 1, AC Bus 2
D) AC Bus 1, AC Bus 2, Essential Bus

Answer 1

The AC Bus power priority order in most AC power distribution systems, especially those in aviation, typically starts with the Essential Bus, followed by AC Bus 1, and then AC Bus 2 to ensure critical systems always have power.option c is correct.

Step-by-step explanation:

The question is asking about the power priority order for an electric panel in AC (Alternating Current) power distribution systems, particularly in aviation or similar applications. In such systems, the general priority order often starts with the Essential Bus, which powers critical systems that must remain on at all times, even in the case of a generator failure.

Following that priority is typically AC Bus 1, and then AC Bus 2. This is because AC Bus 1 is often powered by the left generator and AC Bus 2 by the right generator, ensuring that essential functions have power even if one generator fails. Therefore, the correct power priority order would generally be: C) Essential Bus, AC Bus 1, AC Bus 2.