Question

an open-delta three-phase transformer system has one transformer center-tapped to provide a neutral for single-phase voltages. if the voltage from line to center tap is 277 v, what is the high-leg voltage? if a single-phase load is connected across the two line conductors and neutral of the transformer above and one line has a current of 80 a and the other line has a current of 68 a, how much current is flowing in the neutral conductor?

Answer 1

480 V is the high-leg voltage. 12 A of current is passing through the neutral conductor.

What's current ?

In a full electrical circuit, current refers to the speed at which electrons move past a certain point. Current = flow, at its most fundamental level. The international unit for measuring current is an ampere (AM-pir), sometimes known as an amp. It describes how many electrons (sometimes referred to as "electrical charge") travel past a certain point within a circuit over a specified period of time. In a circuit, a current of 1 ampere corresponds to the movement of 1 coulomb of electrons, or 6.24 billions billion (6.24 x 1018) electrons, through a single location in a second.

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