Find the regulation of an AC g voltage of 3240 V at 80 percen 20 % 27 % 35 % none of the above Will the percent regulation at u 80 percent lagging power facto larger smaller same none of the above

6 A)

The no load voltage is 3240V.

Full load voltage is 2400V.

The power factor is 80% lagging

The voltage regulation is given by:

Voltage regulation = (No load voltage – Full load voltage) / Full load voltage * 100%

Voltage regulation = (3240 – 2400) / 3240 *100%

Voltage regulation =25.9%

This is the regulation at unity power factor. The regulation at 0.8 power factor lagging becomes:

Voltage regulation = 25.9*0.8

Voltage regulation = 20%

So, the regulation of the transformer at 0.8 lagging power factor is 20%.

Therefore, the correct option is (a).