How is fuel supplied to the engines during emergency electrical configuration?

In the emergency electrical configuration, the fuel supply system for the A320 is designed to ensure that the engines receive fuel even with limited power availability. Gravity feed becomes critical in this situation because it allows for the continuous flow of fuel from the tanks to the engines without reliance on electrical pumps.

When the aircraft is in an emergency mode, electrical systems are minimized, and many pumps may not be operational. The gravity feed system, however, ensures that the engines can still receive fuel directly based on the tank design and fuel position within the tanks. This capability is essential for safety, allowing for continued engine operation even if the primary electrical systems fail.

Other options like using active fuel pumps presume that all necessary electrical components are functioning, which is not the case during an emergency electrical configuration where the priority shifts to maintaining critical systems with minimal resource consumption. Therefore, utilizing gravity feed is a robust method for ensuring that the engines have the fuel required for operation when conventional pump methods cannot be employed.