The voltage to ground of a high leg or stinger leg on a three-phase open delta system will be approximately?

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Multiple Choice

The voltage to ground of a high leg or stinger leg on a three-phase open delta system will be approximately?

Explanation:
In a high-leg delta, the three line voltages are 240 V, and one winding is center-tapped to provide a neutral so two of the legs can deliver 120 V to neutral for standard 120/240 V service. The third leg, the “high leg,” does not center on that neutral. Its voltage to neutral is higher due to the phasor arrangement of the three phases; it ends up being about 240 V times the sine of 60 degrees, which equals roughly 208 V. So the voltage to ground on the high leg is approximately 208 V.

In a high-leg delta, the three line voltages are 240 V, and one winding is center-tapped to provide a neutral so two of the legs can deliver 120 V to neutral for standard 120/240 V service. The third leg, the “high leg,” does not center on that neutral. Its voltage to neutral is higher due to the phasor arrangement of the three phases; it ends up being about 240 V times the sine of 60 degrees, which equals roughly 208 V. So the voltage to ground on the high leg is approximately 208 V.

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