What would be the line current if each winding of a 3-phase transformer has a coil current of 60 amps?

To determine the line current in a 3-phase transformer when each winding has a coil current of 60 amps, it's important to understand the relationship between phase current and line current in a 3-phase system.

In a 3-phase transformer, the current flowing through each winding (which is referred to as coil current or phase current) does not equal the line current directly, particularly if the transformer is connected in a delta or wye configuration.

For a wye (Y) connection, the line current is equal to the phase current. However, in a delta (Δ) connection, the line current is greater than the phase current. Specifically, in a delta connection, the line current is calculated using the formula:

[

I_{\text{line}} = \sqrt{3} \times I_{\text{phase}}

]

Given that the coil current (or phase current) is 60 amps, we can apply this formula:

[

I_{\text{line}} = \sqrt{3} \times 60 \text{ amps} \approx 1.732 \times 60 \text{ amps} \approx 103.9 \text{ amps}

]

This calculation confirms that when each winding of