In relation to backfeed protection, what is being prevented?

Backfeed protection is primarily aimed at preventing backfeeding from unintended sources. This situation can arise, for instance, during a power outage when a generator is connected to a system without proper isolation. If the generator sends power back into the grid, it can create hazardous conditions for utility workers who might be servicing the lines, as well as potentially damaging equipment.

This protection mechanism ensures that energy flows only in the intended direction—from the source to the load—and not back into circuits or systems that should remain de-energized. Preventing backfeed from unintended sources is crucial not only for operational integrity but also for safety concerns, making this the correct choice in understanding the purpose of backfeed protection.