In AUTO position, who controls battery contactor actuation?

In AUTO position, who controls battery contactor actuation?

• A. EDL
• B. GPU
• C. APU
• D. Flight Crew

Answer: (A)

In AUTO, the battery contactor actuation is controlled by the Electrical Distribution Logic. The EDL is the automatic brain of the electrical system; it monitors power sources (like the GPU and APU/generators) and bus status and commands the battery contactor to connect or disconnect as needed to keep essential buses powered and to prevent backfeeding. The GPU or APU provide power, but they don’t directly drive the contactor in AUTO, and manual pilot action is not required unless you switch to manual control.

In AUTO, the battery contactor actuation is controlled by the Electrical Distribution Logic. The EDL is the automatic brain of the electrical system; it monitors power sources (like the GPU and APU/generators) and bus status and commands the battery contactor to connect or disconnect as needed to keep essential buses powered and to prevent backfeeding. The GPU or APU provide power, but they don’t directly drive the contactor in AUTO, and manual pilot action is not required unless you switch to manual control.