How to convert kw into kva?

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Step 1
The KVA equation is for the potential of the electrical circuit. This means the electrical circuit can provide this much power to the motor or device. The KW equation will give the actual power used by the device or motor since the power factor of the motor is multiplied into the formula. The power factor is generally listed on the identification nameplate of most larger electrical motors that use a 3-phase power.
Step 2
Calculate the KVA of an electrical circuit that has the potential of 480 volts at 50 amperes. Multiply 1.73 times 480 times 50 will equal 41,520 VA. Note that the answer is in VA (volt amperes) and not KVA. We must divide 1000 by the final answer in order to change the VA into KVA. To find KVA from 41,520 VA divide this number by 1000, this will equal 41.52 KVA.
Step 3
Find the KW rating or consumption of the 3-phase circuit if the power factor of the device is 1.15 as identified on the nameplate. Use the formula, (KW = KVA * power factor) to find the result. KW is equal to 41.52 KVA times 1.15, which results in 47.748 KW.
Step 4
Find the KW consumption of the following 3-phase motor circuit that has a voltage of 230 VAC, a current draw of 75 amperes and a power factor rating of .95. Using the formula (KW = 1.73 * volts * amperes * power factor/1000) we can plug in the numbers so the equation looks like, KW = 1.73 * 230 * 75 * .95/1000. This will equal 28.350 KW.
Alternative Answer
A volt ampere is the unit of measurement for apparent power, which is the vector sum of a load's true power (watts) and reactive power (reactive volt amperes).

So, if you know the load's true power, then you need to know either its reactive power or its power factor in order to determine its apparent power, as follows:

either: (apparent power)2 = (true power)2 + (reactive power)2

or: apparent power = true power x power factor
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What is the formula to convert kW or kVA into AC amperes?

Some confusion here KW and KVA are units of power. The ampere is a unit of current. If you divide power by the voltage involved, you can determine the current involved, in amps. Power (watts) = volts x amps A volt-amp is a watt. (A volt times an amp is a watt.) . I=(KVA*1000)/(1.732*V) (Th ( Full Answer )

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 dep ( Full Answer )

Difference between kva and kw?

kw means total usefull power if the power factor is unity Alternative Answer The symbol 'kW' ( not 'kw') represents 'kilowatt', and the symbol 'kV . A' ( not 'kva') stands for 'kilovolt ampere'. In a.c., the product of supply voltage and load current is called 'apparent power', and is expres ( Full Answer )

How do you convert kw to kva?

kVA = kW divided by (power factor). The power factor is the cosine of the angle between voltage and current.

Convert 20 kva to kw?

Your question cannot be answered, unless the power factor of the load is specified. Since true power (measured in watts ) is the product of apparent power (measured in volt amperes ) and the power factor of the load. So, given your figure of an apparent power of 20 kV . A ( not 'kv ( Full Answer )

How many KW in a KVA?

In case of unity Power factor . One Watt is = 1 Volt - Amp (from the formula P = I x E), . One kilo Watt is a kilo Volt Amp. . 1 kW = 1 kVA For PF = 0.8, 1 kVA = 0.8 kW

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 t ( Full Answer )

Why transformer rating in KVA instead of KW?

There are 2 losses in transformer. 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 transformers are rated in KVA and not KW. Single phase KVA = Amps x Volts/1000. Single phase KW = Am ( Full Answer )

What is the relation between KVA and KW?

When calculating kW, power factor is brought into the equation Formula for single phase kVA = I x E/1000, 3 phase kVA = I x E x 1.73/1000 Formula for single phase KW = I x E x pf/1000, 3 phase kW = I x E x 1.73 x pf/1000 Alternative Answer When an AC current flows through a purely res ( Full Answer )

Why alternators are measured in Kva but not in KW?

Depending upon the connected load ( R, RL, RC or RLC) with a transformer, the power goes ou from a transformer may be of two types:. 1. Active Power; measured in kW. 2. Reactive Power; measured in kVAR. If the rating will be in kW, then kVAR rating would not be accounted but if the rating is in k ( Full Answer )

How do you convert kW-h to kW?

A kilowatt (kW) is the unit used to measure the rate of energy consumption of an electrical appliance or some other kind of electrical equipment. It is equal to 1000 watts. A kilowatt-hour (kW . h) is a unit of energy consumed and is equal to 1000 watts used for one hour. It is also equal to 2 kil ( Full Answer )

What is KW and KVA?

"kW" (kilowatt) is a measure of rate of actual energy flow. "kVA" is AC voltage multiplied by current. Purely reactive loads (inductors and capacitors) do not dissipate power (energy) so there is no "kW" value. On the other hand, they do conduct current and a "kva" value can be worked out. For a ( Full Answer )

Instead of KVA why not used KW?

The kVA (kilovolt ampere) is the vector sum of real + reactive power in an AC circuit. The kW (kilowatt) is a measure of the real power in that circuit. Inherently, a circuit will not require only real power, but also reactive power. Thus kVA is a more meaningful value when considering sizing equipm ( Full Answer )

How many kva is 21000 kw?

KVA is the vector sum of real and reactive power; put differently, KVA at a specified power factor will tell you how many KW you have: KW = KVA * pf You must provide a power factor or power factor angle (if angle, replace pf with cos (pf) in above equation) or total reactive power to calculate.

Is there any difference between Kw and KVA?

Yes. KW is real power, while KVA is the sum of the vectors of real and reactive power. Put another way, KW output (of a generator, for example) can be defined as the KVA at a specific power factor.

How much kva equal to kw?

0.8 x KVA =KW Answer The kilovolt ampere ( kV . A , not kva) is the unit of measurement for apparent power . The watt is the unit of measurement for true power . The reactive volt ampere ( var ) is the unit of measurement for reactive power . Apparent power is the vector sum of ( Full Answer )

How do you convert kva to kw and currents?

3 phase kVA = V*I*sqrt(3) Where voltage is line to line, and current is the actual RMS current flowing in the a wire. kW = V*I*sqrt(3)*Cos (phi), where phi is the angle between the voltage and current; Cos (phi) is also known as the power factor. kVA is the vector sum of kW (real power) and kV ( Full Answer )

Why transformer rating in KVA not in KW?

The volt ampere is a measurement of apparent power, while the watt is a measurement of true power. Apparent power is simply the product of voltage and current; the output of a transformer, therefore, is the product of its rated secondary voltage and its rated secondary current -i.e. the apparent pow ( Full Answer )

How do you calculate kw to kva?

Watts = Amps x Volts x Power Factor. VA = Amps x Volts Watts and VA are equal only for resistive load where Power Factor = 1.

Why motor rating in kw not in kva?

motors are rated in kw why because for motor the load is mechanical load. only active power converted to mechanical power is significant and in motor rotational losses,frictional and windage losses, we cant express these losses in VA, only expressed in KW. hence the motor rating in KW -ashok(BE)

Why ac generator rating in kw not in kva?

A small AC generator rating may be specified in kW, because that is the maximum useful (real) power that can be produced by that generator. If the purpose of the generator is to run small power tools, some lights, maybe a TV or grill, this is a more useful value for the Average Joe to know. On bigg ( Full Answer )

How many kw in one kva?

If it's a simple resistive circuit, or a D.C. circuit, 1 kVA = 1 kW. Generally, it depends on your power factor. Since real power, P, is equal to the total power, S, multiplied by the power factor, p.f. Power factor is the cosine of the angle between the current and the voltage, O . So, P = S * ( Full Answer )

Why alternators are rated in kva not in kw?

Because the generator has separate maximum ratings for voltage andcurrent. The VA rating is the product of those ratings. This isindependent of the load, which might have any power factor between0 and 1.

How do you convert electrical power KW to KVA?

A: They are both the same the first is the product volts times amperes the second is related to volts and amperes also. The difference is the second term is used to rate transformers power output in terms of voltage to amperes. Example a 1kva means that you can expect 1kv at 1 ampere on the transfor ( Full Answer )

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 F ( Full Answer )

How many kw equals 1 kva?

For normal power factors (pf=80%), you have 0.8 kW for every kva.In general however, kW = pf x kVA. Where pf is the power factor, itis the cosine of the angular difference between the voltage and thecurrent of a circuit in alternating current circuits.

How can you convert kVA to kW?

KVA = (Volts x Amps)/1000 Watts = (Volts x Amps x Power Factor)/1000 Power Factor is from 0 to 1 with 1 being related to a pure resistive load. Power factor is less than one for inductive devices like motors which are more likely to be rated in KVA or just VA. A KVA rating will therefore alway ( Full Answer )

How do you convert KW to KVA in single phase?

In common everyday usage and in about 99% of the circuits you will work with, KW and KVA are the same value. However, Watts has a very technical definition that does not exist in every circuit, such as motors, transformers, and capacitors, but every circuit has volt-amps, or VA. The K just stands fo ( Full Answer )

Why transformer is read in rating KVA but not KW?

Transformers are rated in KVA which is equivelant to "apparentpower". Loads, {such as heaters, lamps, etc.} are rated in KW whichis equivelant to "real power". Things such as power factor andtransformer efficiency account for the diifference between the twovalues. KW's are what the load requires and ( Full Answer )

How do you convert Kva-Kw?

To convert from KVA (kilovoltamperes) to KW (kilowatts) simply multiply by power factor. Power factor is the cosine of the phase angle between voltage and current.

What is the difference between KVA and KW of a transformer?

VA is just volts x amps. Watts takes into account Power factor such that watts = volts x amps x Power Factor. Since the Power Factor is one for a pure resistive load and decreases with inductance. Therefore a transformer rated in VA indicates maximum power rating. The K is just a multiplier of 100 ( Full Answer )

Is 1 kva 1 kw?

Yes, if the power factor (cosine of the phase-angle between voltage and current) is ' 1 '. In order for that to be true, the total load impedances on the line have to be pure resistive, with zero reactance. All of this stuff applies only on an AC line. On a DC line, voltage and current are ( Full Answer )

Why is the transformer rated in kVA and not kW?

Because a transformer is rated separately for maximum voltage andmaximum current. Multiply the two together to find the rated kVA. Excessive current causes overheating in the copper wire windingsbecause of the resistance of the wire, while excessive voltagecauses overheating in the iron core becaus ( Full Answer )

Why motor rating are in kw and not in kva?

Because the machines which use power i.e; load, are always rated in KW and the machines which produce power i.e generators, are rated in KVA. Answer A motor's mechanical load is expressed in watts (horsepower in North America), so the output power of the motor must also be expressed in watts ( ( Full Answer )

Why the transformer rating in kva why not in kw?

A transformer has separate ratings for maximum voltage and maximumcurrent. Both limits must be observed. The maximum voltage is setby the magnetic flux density in the core, while the current limitis set by the size of the wire used in the primary and secondarywindings. Multiplying the two together g ( Full Answer )

Why transformers are tated in kva but not kw?

Because it is the current rating of the windings that determine the maxium load current, and the product of rated current and rated voltage, in a.c., is apparent power (in volt amperes), not true power (in watts). And, incidentally, the correct symbols are kV . A and kW, not kva and kw.

How will convert kva and kw?

The kilovolt ampere ( kV . A , not 'kva') is the unit of measurement for apparent power . The kilowatt ( kW , not 'kw') is the unit of measurement for true power . The relationship between these two quantities is: true power = apparent power x power factor

Why generator rating in Kw instead of Kva?

generators are limited by the amount of power available 1a at 1200v, 10a at 120V, 100A 12v all the same true power for resistive load generators usually fixed voltage so give 120v constantly almost no current with inductive load lots of current with capacitive load but will usually stall ( Full Answer )

Why are transformers rated in KVA and not in kW?

The watt is a measure of true power , which is theproduct of the supply voltage, load current, and load power factor.The volt ampere is a measure of apparent power , whichis the product of the supply voltage and the load current. A transformer manufacturer has no means of knowing the power fac ( Full Answer )

Can direct current kW be converted to KVA?

With a dc system the kW are always equal to the kV times the amps. It's only with ac that the kW are usually less than the kVA by a factor called the power factor.

A load of 9.41 kVA is equal to what in kW?

For a purely resistive load with a unity power factor, 9.41 kVAwould equal 9.41 kW. However some equipment such as a motor willhave a power factor less than 1. If the power factor is 0.8 then9.41 kVA would equal 9.41 x 0.8 kW.

What is the difference KVA and KW?

In an ac system the kVA is the product of the kV and the amps. Butin some loads such as electric motors the current is not in phasewith the voltage so some power flows from the load back into thesupply for a fraction of the ac cycle. That means that the averagepower flow in kW is generally less than ( Full Answer )

What is total KW for an 250 kva Transformer?

A 250 kVA transformer can supply a maximum of 250 kW but only to aload with a power factor of 1. For other loads the maximum poweravailable is 250 kW multplied by the power factor.

Why transformer rating is called kva not kw?

Because a transformer has separate ratings for the voltage and thecurrent. The two, multiplied together, give the VA or kVA ratingwhich is independent of any load that might be applied.

Why motors and generator are rated in kva not in kw?

The output of a motor is always expressedin watts or kilowatts (except in the USA, where horsepower isused), never in kilovolt amperes. The output of a generator is expressed in voltamperes or kilovolt amperes (the product of its rated terminalvoltage and rated load current) because the man ( Full Answer )