What is the lowest voltage level in the Bulk Electric System (BES)?

In the context of the Bulk Electric System (BES), the lowest voltage level recognized is 100 kV. This threshold ensures that the BES encompasses only those facilities that are critical to the reliable operation of the electrical grid. Voltage levels below this threshold typically fall under different classifications and are usually managed by local distribution systems rather than the bulk transmission system.

Understanding this classification is important for maintaining grid reliability and managing load flow effectively across different regions. Therefore, recognizing 100 kV as the minimum voltage for inclusion in the BES reflects an understanding of the operational standards and practices that govern high-voltage transmission systems.