What is the approximate current in the secondary of a 100 kVA, 480:208/120 volt, 3-phase wye transformer?

To find the approximate current in the secondary of a 100 kVA, 480:208/120 volt, 3-phase wye transformer, it's important to understand how to calculate the secondary current based on the power rating and voltage.

First, you can use the formula for three-phase power:

[

P = \sqrt{3} \times V \times I

]

where (P) is the power in kilowatts (kW), (V) is the voltage, and (I) is the current. In this case, we're dealing with the secondary side of the transformer operating at 208 volts (since it is a wye configuration, we'll use the line-to-line voltage).

1. Convert kilovolt-amperes to watts for the calculation:

[

100 , \text{kVA} = 100,000 , \text{VA}

]

2. Rearranging the formula to solve for current:

[

I = \frac{P}{\sqrt{3} \times V}

]

3. Substitute the values into the formula:

[

I = \frac{100,000}{\sqrt