if we look on phasor of the transformer vaoltage is 180 oppsite at primary and

if we look on phasor of the transformer vaoltage is 180
oppsite at primary and the secondary so to improve a power
factor is secondary should kept negative to improve it
primary side

means is -.90 became +.90 at other side

Question Posted / sandy_harry21

1 Answers
1953 Views
I also Faced
E-Mail Answers

if we look on phasor of the transformer vaoltage is 180 oppsite at primary and the secondary so to..

Answer / Nitin Dutta

The phase angle difference between primary and secondary voltage in a transformer is always 180 degrees out of phase, not opposite in sign as you mentioned. However, the power factor can be improved by reducing the phase angle difference between the current and voltage, which means leading or lagging the current to match the voltage more closely. To improve the power factor on the primary side, the secondary side should lead (if the power factor is lagging) or lag (if the power factor is leading). The power factor improvement doesn't require changing the sign of the secondary voltage; instead, it involves adjusting the phase angle.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

what is earthing.how we make it,describe briefly.

1 Answers HAL,

How is operate breaker failure scheme in substation

1 Answers

What is the difference between 2 wires RTD's and 3 wires RTD's.Kindly explain the wiring diagram.

1 Answers QAFCO,

how does grading rings & spacers in transmission line works? Working Principle?

1 Answers

how ceiling fan worked?

1 Answers

what is different between earthing and grounding for a electrical eqipment ?

2 Answers BARC, Omega Maritime,

To attain a powerfactor more than .95, how much kvr should we use for 100 HP of current

4 Answers Bhel, Scooters India,

What will happen if 2 phase supply is given to 3 phase motor?

4 Answers ABC,

Do Phase angle measurement have any application in freq/harmonics measurement? If so how?

1 Answers

I want to know which cable would be best to carry 125A current to a distance of 50m. Voltage is 3phase. Kindly share the formula with answer.

1 Answers Medway Educational Consultant,

Is it possible to import & export power through the same power transformer? what will be the vector group normally for both different or same?

1 Answers

what is the formula for 3 phase motor starting cureent deatials 3phase 148A delta 415v, efficiancy 94% can we run the motor with 200A incoming supply

2 Answers

For more Electrical Engineering Interview Questions Click Here