Question

3. Harris is putting in a three-phase Y-Y-
connected transformer bank and the
secondary line-to-line voltage is 208 V.
What's the line-to-neutral voltage?
O A. 120 V
O B. 359 V
C. 69 V
O D. 240 V

Answer 1

120V is the line-to-neutral voltage .

What is Line Voltage ?

It is defined as the voltage of a power transmission circuit or distribution circuit up to the point of transformation or utilization.

The secondary line voltage is $V_{L} = 280 V$

The notation AC indicates that the current is an alternating current.

The given formula is $V_{ph} = \frac{V_{L} }{\sqrt{3} }$

Substitute  208 V into the formula

$V_{ph} = \frac{V_{L} }{\sqrt{3} } \\\\V_{ph} = \frac{208V}{\sqrt{3} } \\\\= 120 (Approx)$

So, the line-to-neutral voltage is 120 V.

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