Releationship between KW and KVA?

Question

Releationship between KW and KVA?

Answer 1

KW is the measure for real power: the capacity of the system to perform work in a given time.

KVA is the measure for the Apparent power = Current x Voltage

In AC systems where reactive loads are present, (capacitors or inductors) energy in these loads returns to the source and therefore becomes not available, making the real power (KW) lesser than the apparent power (KVA).

The ratio of the real power to the apparent power is called the power factor (pf) with values 0 to 100%.

When power factor = 100%, only then Real Power = Apparent Power.

Answer 2

KW: kilo Watt so 1000 Watt whith is a power (P; real power)

P=V*I*cos(phi) with V voltage (volt), I current(ampere) and cos(phi) le factor of power... phi is the angle between I and U

KVA: kilo VA so 1000 Volt Ampere wich is for S(apparent power)  knowing that S=UI with I the current

cos(phi)=P/S

|S|=Squarefoot(P²+Q²)

Q: reactive power in VAR: Volt Ampere Reactive

S in Complexe =P+jQ with j the imaginary unit

Answer 3

1 kw = 1.2 kva

Answer 4

Kw = Kva x power factor

Where power factor = cosine of the phase angle between voltage and current

Answer 5

Let me tell straightway:

kVA is the product of Voltage (V) and Current (A) divided by 1000. This is a theoretical Power.

kW on the other hand is the product of Voltage (V), Current (A) and Power Factor (phi) in an AC circuit. Power factor is less than 1 always (I hope you know what a Power Factor is). kW is the real power you get and is less than kVA for the same voltage and current.