whytransformers rating in KVA?
Answers were Sorted based on User's Feedback
Answer / d.ramesh classes
efficiency of transformer depends on core loss and copper loss. core loss depends mainly on voltage and copper loss depends on current passing through the winding. so basically total loss i.e. efficiency depends on voltage and current that's why we rate transformer in KVA.
by D.RAMESH CLASSES
Is This Answer Correct ? | 11 Yes | 0 No |
Answer / abhishek maji
Transformers ratings are given in kVA because the operating power factor of a transformer depends on the load,it is not constant rather varies with load...Secondly if it is rated in kW then as the operating power factor is not known in advance so operating current may be more than its rated current which may affect the winding insulation due to additional heating......Thirdly a transformer acts as an interfacing device between the power generating station and the load center and as my load not only demands active power but also requires reactive power so a transformer must have the capability of handling both types of powers.. that's another reason why transformers ratings are in kVA...
Is This Answer Correct ? | 2 Yes | 2 No |
Answer / lakhan.self
Transformer is a static device which transfer the power from primary to secondry winding without change in frequency. So VA is unit of apperent power by means power is same ie VA in both side so Transformer rating is in KVA.
Is This Answer Correct ? | 5 Yes | 7 No |
which type of starter is suitable for single phase motor ?
How can i learn to programme every VFD. Or is there any typical study to understand VFD programming.
the distance from my office to d.g is aprox 400mtrs and voltage drops ibn my office near about 40 volt what should i do p[ls suggest.
2. The heaviest and lightest strings on a certain violin have linear densities of 3.0 and 0.29 g/m. What is the ratio of the diameter of the heaviest string to that of the lightest string, assuming that the strings are of the same material?
The advantage of free wheeling diode in a Full Ware rectifier is -reduces the harmonics -Supplies the voltage at negative vlotage
What is the impact of MCCB & MPCB on Distributed Control System?
Which Machine u will prefer to use at a place where flammable gases are coming out & why ?
WHY SECONDARY OF CT SHOULD NEVER BE KEPT OPEN CIRCUITED?
What are test signals and their significance?
what is load vs Torque curve & why it is used?
how much amp MCB is required for 1/2 kva power back up?
"What is the difference between voltage and potential differnce?"