Why Generator KVA not in KW ?
Answers were Sorted based on User's Feedback
All electrical devices that supply power are usually rated in kVA. but generator put supply power in kVA because KVA is "apparent power" which does not take an account of power factor and KW is "true power". They generated own power factor
like :
VA = E X I
W = E X I COS PHI
Is This Answer Correct ? | 2 Yes | 0 No |
All electrical devices that supply power are usually rated in kVA. This includes transformers, UPS's & the like.
Simply put, the difference between kVA & kW is that kVA is "Apparent Power", which does not take into account the Power Factor & kW is "True Power" . See the below equations:
VA = E x I
W = E x I x Cos phi
The above equations are only for single phase.
When a manufacturer makes a transformer, generator, UPS etc, they have no idea of the type of load that will be used & consequently can only rate the device according to its maximum current output that the conductors can safely carry (at untiy Power Factor) & the insulation rating of the conductors (voltage & temperature).
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / dave mudra
The power √3 VL IL Cos φ delivered by the alternator for the same value of current, depends upon p.f. (Power Factor=Cos φ) of the load. But the alternator conductors are calculated for a definite current and the insulation at magnetic system are designed for a definite voltage independent of p.f. (Cos φ) of the load. For this reason apparent power measured in kVA is regarded as the rated power of the alternator.
Is This Answer Correct ? | 0 Yes | 0 No |
what is VFD and where is use of it
What is a commutator?
Why used in layer by layer charcoal and salt used in earth pits.
11 Answers CESC, HP,
why the transformer neutral earthing is to be done by copper flat only,if we use GI flat what is the disadvantage.
what is the difference between indoor package substation and outdoor
What is the Levels of High Voltage, Medium Voltage & Low Voltage?
what is the difference between LLL and LLLG fault ?
I have a current transformer with 1 main reading meter with transformer outside the building and a control panel having 5 CT reading meters with black round coils inside the building. I want to know, A) when current pass through the Transformers, will the current be reduced or be the same and after that B) when current pass through the CT meters with black round coils, will the current be reduced or be the same. C) in the above process will the reading of the main meter be same or different, from the total reading of all the 5 CT meters.
how can decide the current rating of oltc
How to calculate battery back up time for a 400 AH battery bank installed in telecom shelter for a load of 20 Amps and time taken to fully charge this battery bank?
i have install 750 kva distribution transformer at my site and want to do neutral earthing. what calculations should i follow to determine earthing conductor material and size?
why we used capacitor in induction motor?