What is kva and what is kw and deffirent between?

Question

What is kva and what is kw and deffirent between?

Answer 1

Kva.  Kilovolts amps.        Kw.   Kilowatts.

Answer 2

http://www.powerstream.com/VA-Watts.htm

For DC, KVA=KW

For AC, KVA*PF=KW

Phase of the load is taken into consideration.  

Answer 3

Kva is kilo volt amphere and Kw is kilo watt

Kva is normally representing source(transformers,generators,UPS)

Kw is representing load(A/c,power,lighting etc.,)

Sources can supply loads ..but as we don't know the power factor of load which we are going to connect we rate the sources in Kva(imaginary power)

and as we know the power factor of load we always rate it in Kw(real power)

In normal cases for AC distribution we assume the power factor as 0.8

so Kw=Kvax0.8

If you have a load in Kw and if you want to find out the source rating here is an example:

load = 200 Kw(3 phase)

source required = Kw/0.8

                       = 200/0.8=250Kva

the reason for considering power factor is the real and imaginary are always not same.

Answer 4

kVA is apparent power.

kW is actual power

kW = kVA * pf (power factor)

Power factor is basically the amount of wasted power used.

if the power factor is 1 as in an electric heater then kVA=kW

If the power factor is .8 then  ( like a motor) then kW = kVA * 0.8

always a small "k" and capital VA or W

Answer 5

KVA is called kilovolt-amperes and is the complex power which includes both real and reactive power, KW is a plain kilowatt and represents only the real portion of the power.