what is KVA?

Answer 1

1 KVA=1000 VA.
A volt-ampere in electrical terms, means the amount of apparent power in an alternating current circuit equal to a current of one ampere at an emf of one volt. It is dimensionally equivalent to watts. An example might be the purchase of an AC transformer rated in electrical terms by volt amperes.
http://en.wikipedia.org/wiki/Power_factor
http://en.wikipedia.org/wiki/Volt-ampere

Answer 2

Kilovolt Amperes

Answer 3

Kilo Volt Amps

Generally equivalent to Kilo Watts,
but KVA tend to be used in 3 phase applications
while Kilowatts tends to be used in single phase (domestic) applications
I think it is to do with the phase angle difference between the current and voltage in 3 phase lines,

Answer 4

A volt-ampere in electrical terms, means the amount of apparent power in an alternating current circuit equal to a current of one ampere at an emf of one volt. It is dimensionally equivalent to watts. An example might be the purchase of an AC transformer rated in electrical terms by volt amperes.

Not sure if this is what you're looking for!

Answer 5

Kilo Volt Amp

or

1 Kilo Watt

as volts * amps represents power in a circuit hence Watt

Answer 6

Kilo Volt Ampere. It is unit of Power

Answer 7

its kilo watt ampere , the unit of apparent power (S)
S = Vrms* Irms
it appears as if this the actual power , but actually itsn't , its also so called watt less power .
S^2 = P^2 + Q^2
where P & Q are the true (active) & reactive(watt full ) powers respectively .

P = Vrms* Irms * cos(phi) , where cos(phi) is the power factor.
P is the actual power used in an ac circuit .

S = Vrms* Irms* sin(phi)
S is the reactive power used in an ac circuit .
cos(phi) = R/Z where R& Z are the resistance & impedance in any ac circuit .

this is not the case in dc , as all dc quantities have the same direction , magnitude throughout. while ac qts have time varying direction , magnitude .

Answer 8

kilovolt-amperes of apparent power

when the power factor = exactly 1, KVA = W

see http://en.wikipedia.org/wiki/KVA

and follow the links on that page

Answer 9

apparent power VA = Volts x Amperes. (ignore the k (lower case) as this just divides the value by 1000 and makes it easier to work with.

this is different to Watts (or kW's) in that it includes the component known as
reactive power VAr

VA=W+VAr

(please note these are added together using complex notation since kVAr is at right angles to kW)

so...

VA= apparent power (useful and non useful energy
W= true power (useful energy)
VAr= reactive power (no useful energy)

Answer 10

I don't believe it for the fist time someone who knows what VA and W are. Mark G take a bow.....