Which altitude results in a MAD of 3 feet, 3 inches for a 34.5 kV system?

In the context of a 34.5 kV system, the Margin of Air Dielectric (MAD) increases with altitude due to the reduction in air pressure and density, impacting the dielectric strength of the air. The MAD of 3 feet, 3 inches indicates a specific requirement for the electrical clearance at a given altitude to ensure safety and proper functioning of the system.

The altitude that produces this specific MAD is derived from standardized calculations or empirical data reflecting the behavior of electrical systems at different elevations. The correct altitude, in this case, is 10,152 feet, which corresponds to the required MAD for a 34.5 kV system. This higher altitude would necessitate a specific adjustment in spacing or clearances due to the lower air density.

In contrast, the other altitudes listed do not meet the necessary conditions for achieving a MAD of 3 feet, 3 inches at 34.5 kV. Each altitude correlates with different dielectric strengths and safety margins, and hence the values provided differ in their effectiveness in maintaining operational standards for this electrical rating.