# What is difference between kw and kva?

kW is the unit of real power & kVA is the unit of Apparent power.

Apparent Power= real power + reactive power

Besides this,the ratings which we write on a motor or generator is KVA & not KW. B'coz there are two types of losses in a motor or generator- core losses & ohmic losses. Core loss depends upon the voltage applied & ohmic losses depend upon the current flowing & none of these losses depend upon the power factor i.e. Cos@. As we know that

KW power = V * I *Cos@.

But as the losses are independent of the power factor hence we need to calculate only KVA = V*I.

### Comment

Apparent power is the **vector sum** of real power and
reactive power, *not* the sum.

KVA is the unit of apparent power and KW is unit of active
power.

KW is kilowatts, and KVA is kilovoltamps. KW is the apparent power that a normal power meter would measure, while KVA is simply the maximum of the instantaneous product of volts and amps divided by 1000. The difference between these two terms is due to phase angle, which is due to the reactance of the load to an AC power source.

KW (kilowatts) is apparant power, while KVA (kilovoltamps) is true power. They are different when the phase angle between voltage and current is not zero, i.e. when the load is reactive, such as in a motor. The ratio of KW over KVA is Power Factor, and is the cosine of the phase angle between voltage and current. It is zero at a phase angle of 90 degree, which occurs for purely (ideal) inductive or capacitive loads with no resistance in the source or conductors, and it is one for purely resistive loads.

### Is 6.5kW greater generator than 6.5 kva generator?

Yes of cours 1 kw =1.25 kva wich mean 6.5 kw =8.12 kva if you have generator 8.12 kva it give you 6.5 kw ============================= Answer #2: 1 kw does not necessarily = 1.25 kva The relationship between KW and KVA depends on the nature of the load you're powering, and is called the "power factor". It describes how closely the voltage and current peaks coincide in time. If the load has any inductive or…

### How do you change kw into kva?

In electrivity, KW can be converted to KVA with the help of power factor('phi'- greek symbol) Power Factor is a value dependent on phi. It can only lie between +0 to +1 Formula: (X) KVA = P.F x (X) KW. For an ideal system 1 KVA = 1 KW.......P.F = 1 For practical System Power in KVA = Power Factor x Power in KW. Generally a system with non-mechnical parts (eg. Solar) gives 0.95<PF<0.99

### What is the difference between KW and KVA?

KW is kilowatts, and KVA is kilovoltamps. KW is the apparent power that a normal power meter would measure, while KVA is simply the maximum of the instantaneous product of volts and amps divided by 1000. The difference between these two terms is due to phase angle, which is due to the reactance of the load to an AC power source. kVA is apparant power, while KW (kilowatts) is true power. They are different when…

### What is the value of 150kvar in kw?

It depends on the power factor, which depends on the reactance of the load. For a typical power factor of 0.92, 150 KVAR translates to 383 KVA, which translates to 352 KW. Power factor is the cosine of the phase angle (theta) between voltage and current. KVA times cosine (theta) is KW, while KVA times sine (theta) is KVAR.

### Why rating of huge ac generators in KVA not in kw?

KVA is the equivalent of Kw. KVA=Kw. Kw=KVA. Volts multiplied by Amps equals power which is measured in Watts. <<>> There are two losses in electrical generation. One is copper loss which depends on current and the other is iron loss which depends on voltage. These two factors are not affected by the power factor. This is why the equipment is rated in KVA and not KW. Single phase KVA = Amps x Volts/1000. Single…

### Which is to consider in sizing generator kva or kw ratins?

the unit of generators power is KVA becoze the kva is the power that contain the active power (KW) and the reactive power mean that the name plate of any generator must contain the rated kva of it (like the transformer P (KW) = P (kva) * cos fi P (KW) = V I cos fi for single phase P (KVA) = V I when cos fi closed to 1 this will increase the useful…

### Why you use KVA in transformer rating instead of KW?

Transformer power is given by P=V*I which takes the unit of KVA while that of KW has energy term which is not produced by the transformer.It only steps up or down the voltage. Answer: In a pure D.C. circuit, KW = KVA. However, in any A.C. circuit, there is real power {KW} and apparent power {KVA}, due to the voltage and current being out of phase. Power Factor is the ratio of KW to KVA…

### When using a resistive load bank to test a generator do you load it to the kW or the kVA?

When using a resistive load bank to test a generator, it does not matter if you load the generator to its kW or kVA rating, because those two numbers are the same when considering a resistive load. Power factor, which is the difference between true and apparent power, only comes into play when there is a reactive (inductive or capacitative) load.

### What is KVA to Watts?

Formulas you need for single phase calculations. KVA = I x E/1000, KW = I x E x pf (where pf = power factor). For your question multiply the KVA by the power factor to get KW and then move the decimal point three places to the right to get watts. They are virtually the same. A watt is volts times amps. KVA is thousand of volts time amps. KVA and KW ratings are the…