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?

Answer 1

The high-leg voltage is
`V_h= 497.76V`

Step-by-step explanation:

A diagram showing the arrangement of this three phase transformer is shown on the first uploaded image

The high - leg terminal is in the diagram is from
`Z_1 - n`

Generally the high-leg terminal is 1.732 times of the the voltage from line to center tap which is given as 277 V

The high -voltage can be computed as follows

`V_h = 1.732 *277`

`V_h= 497.76V`