Watts to kVA – Conversion easy, equation and table calculator free.

Watts to kVA – Conversion easy, equation and table calculator free.
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With this tool you can convert from Watts to kVA easily, quickly and free any electric power, the calculation takes into account the power factor.

The calculation takes into account the power factor of the electrical system and give the most common values.

We also show the formula that is used for the conversion and a table with the main conversions from Watts to kVA.


More information on converting from Watts to kVA:


Definition F.P, S (kva) and P (Watts):

Watts: is Working Power (also called Actual Power or Active Power or Real Power). It is the power that actually powers the equipment and performs useful work.

The real power in watts is the power that performs work or generates heat. Power in watts is the rate at which energy is consumed (or generated). One watt is one joule (energy) per second (1 W = 1 J/s).

Resistive devices or loads such as heaters, incandescent lamps are rated in Watts.

kVA: A kilovolt-ampere, commonly referred to as a kVA, is commonly used as a unit of power in obtaining the electrical capacity of circuit breakers, uninterrupted power supplies and wirings.

KVA is larger than KW because loads are inductive such as motors, discharge lighting, reactors and more current is required to keep the magnetic field energized than is -turned into heat (KW).

Inductive devices or loads such,. as tansformers and motors having power factor less than 1.0 are generally rated in KVA.

F.p: Power factor is the ratio of working power to apparent power. It measures how effectively electrical power is being used. A high power factor signals efficient utilization of electrical power, while a low power factor indicates poor utilization of electrical power.

Power Factor is the cosine of the phase angle between current and voltage.
Power Factor is the ratio of true power to apparent power.

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Watts to kVA calculation formula:formula de W a kVA 

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Typical Un-improved Power Factor by Industry:

Industry Power Factor
Auto Parts 0.75-0.80
Brewery 0.75-0.80
Cement 0.80-0.85
Chemical 0.65-0.75
Coal Mine 0.65-0.80
Clothing 0.35-0.60
Electroplating 0.65-0.70
Foundry 0.75-0.80
Forging 0.70-0.80
Hospital 0.75-0.80
Machine Manufacturing 0.60-0.65
Metalworking  0.65-0.70
Office Building 0.80-0.90
Oil field Pumping 0.40-0.60
Paint Manufacturing 0.65-0.70
Plastic 0.75-0.80
Stamping 0.60-0.70
Steel Works 0.65-0.80
Tool, dies, jigs industry 0.65-0.75

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Typical power factor of common household electronics:

Electronics device Power Factor
Magnavox Projection TV – standby 0,37
Samsung 70″ 3D Bluray 0,48
Digital Picture Frame 0,52
ViewSonic Monitor 0,5
Dell Monitor 0,55
Magnavox Projection TV 0,58
Digital Picture Frame 0,6
Digital Picture Frame 0,62
Digital Picture Frame 0,65
Philips 52″ Projection TV 0,65
Wii 0,7
Digital Picture Frame 0,73
Xbox Kinect 0,75
Xbox 360 0,78
Microwave 0,9
Sharp Aquos 3D TV 0,95
PS3 Move 0,98
Playstation 3 0,99
Element 41″ Plasma TV 0,99
Current large, flat-screen television 0,96
Windows-mount air conditioner 0,9
Legacy CRT-Based color television 0,7
Legacy flat panel computer monitor 0,64
While-LED lighting fixture 0,61
Legacy laptop power adapter 0,55
Laser Printer 0,5
Incandescent lamps 1
Fluorescent lamps (uncompensated) 0,5
Fluorescent lamps (compensated) 0,93
Discharge lamps 0,4-0,6

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Typical Motor Power Factors:

Power Speed Power Factor
(hp) (rpm) 1/2 load 3/4 load full load
0 – 5 1800 0.72 0.82 0.84
5 – 20 1800 0.74 0.84 0.86
20 – 100 1800 0.79 0.86 0.89
100 – 300 1800 0.81 0.88 0.91

Reference // Power Factor in Electrical Energy Management-A. Bhatia, B.E.-2012
Power Factor Requirements for Electronic Loads in California- Brian Fortenbery,2014
http://www.engineeringtoolbox.com

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Watts to kVA conversion table-chart:

Watts f.p kVA
1 0,8 0,001
2 0,8 0,003
3 0,8 0,004
4 0,8 0,005
5 0,8 0,006
6 0,8 0,008
7 0,8 0,009
8 0,8 0,010
9 0,8 0,011
10 0,8 0,013
20 0,85 0,024
30 0,85 0,035
40 0,85 0,047
50 0,85 0,059
60 0,85 0,071
70 0,85 0,082
80 0,85 0,094
90 0,85 0,106
100 0,85 0,118
200 0,9 0,222
300 0,9 0,333
400 0,9 0,444
500 0,9 0,556
600 0,9 0,667
700 0,9 0,778
800 0,9 0,889
900 0,9 1,000
1000 0,9 1,111
2000 0,95 2,105
3000 0,95 3,158
4000 0,95 4,211
5000 0,95 5,263
6000 0,95 6,316
7000 0,95 7,368
8000 0,95 8,421
9000 0,95 9,474
10000 1 10,000
20000 1 20,000
30000 1 30,000
40000 1 40,000
50000 1 50,000
60000 1 60,000
70000 1 70,000
80000 1 80,000
90000 1 90,000
100000 1 100,000

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