At what voltages are transmission lines typically energized?

Transmission lines are typically energized at very high voltages to efficiently transmit electricity over long distances. High voltages reduce energy losses due to resistance in the conductors, making the transmission more efficient and minimizing the need for multiple substations along the way.

The correct answer mentions voltages such as 765 kV, 500 kV, 345 kV, and 230 kV. These levels reflect the standard voltages used in high-voltage transmission systems. For instance, 765 kV is the highest voltage level used in transmission, typically for long-distance transmission lines, allowing for the movement of large quantities of electricity. Voltages like 500 kV and 345 kV serve as major corridors for power flow across regions, and 230 kV is often used for regional transmission to connect substations and supply power to distribution lines.

In contrast, other options provide significantly lower voltage levels that are more suitable for distribution rather than transmission. Voltages like 120V, 240V, and 480V are common in residential and commercial applications, while 1 kV, 3 kV, and 5 kV typically pertain to specific industrial uses or local distribution. Thus, the context of high-voltage transmission confirms