Hp to VA – Calculator, formula, conversion 1 phase, 2 phase, 3 phase

With this tool you can convert from HP to VA easily, quickly and free any electric power, the calculation takes into account the power factor.

For greater ease we explain that formula is used for the calculation, and how to convert from hp to va in just 3 steps.

If you do not know the power factor and efficiency of the load in this section we give you the most common values: “power factor” and “efficiency“.

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More information of calculator from Hp to VA:


HP to VA conversion formula:formula hp to va

  • H.P=Horsepower.
  • E=Efficiency.
  • P.F=Power factor.
  • VA=Volt-Ampere

How to convert Hp to VA in only 3 step:

Step 1:

Multiply Hp (Horsepower) by 746. Example, if you have 100 hp multiply by 746 and you get 74600.

Step 2:

Multiply the Power factor by the motor efficiency. For example, if the motor is an efficiency of 80% and the power factor is 0.9, it must Multiply 0.8 (80%) by 0.9 to obtain 0.72 (0.9×0.8) = 0,72.

Step 3:

Divide step 1 between step 2, the result will be: 103.611VA ((100×0.746)/(0.9×0.8) = 103.611VA).


Definition S (VA), F.P, H.P and Efficiency:

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

VA is larger than Watts 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 (W).

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

Hp: The horsepower (hp) is a unit in the foot-pound-second ( fps ) or English system, sometimes used to express the rate at which mechanical energy is expended. It was originally defined as 550 foot-pounds per second (ft-lb/s). Defined by James Watt (1736-1819) the inventor of first practical steam engine.

A power level of 1 hp is approximately equivalent to 746 watt s (W) or 0.746 kilowatt s (kW).

Motor Efficiency: Electric motor efficiency is the ratio between power output (mechanical) and power input (electrical).

Mechanical power output is calculated based on the torque and speed required (i.e. power required to move the object attached to the motor), and electrical power input is calculated based on voltage and current supplied to the motor.

Mechanical power output is always lower than the electrical power input, as energy is lost during conversion (electrical to mechanical) in various forms, such as heat and friction. Design of an electric motor aims to minimize these losses to improve efficiency.

P.f: 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.


Typical Un-improved Power Factor by Industry:

IndustryPower Factor
Auto Parts0.75-0.80
Brewery0.75-0.80
Cement0.80-0.85
Chemical0.65-0.75
Coal Mine0.65-0.80
Clothing0.35-0.60
Electroplating0.65-0.70
Foundry0.75-0.80
Forging0.70-0.80
Hospital0.75-0.80
Machine Manufacturing0.60-0.65
Metalworking 0.65-0.70
Office Building0.80-0.90
Oil field Pumping0.40-0.60
Paint Manufacturing0.65-0.70
Plastic0.75-0.80
Stamping0.60-0.70
Steel Works0.65-0.80
Tool, dies, jigs industry0.65-0.75

Typical power factor of common household electronics:

Electronics devicePower Factor
Magnavox Projection TV – standby0,37
Samsung 70″ 3D Bluray0,48
Digital Picture Frame0,52
ViewSonic Monitor0,5
Dell Monitor0,55
Magnavox Projection TV0,58
Digital Picture Frame0,6
Digital Picture Frame0,62
Digital Picture Frame0,65
Philips 52″ Projection TV0,65
Wii0,7
Digital Picture Frame0,73
Xbox Kinect0,75
Xbox 3600,78
Microwave0,9
Sharp Aquos 3D TV0,95
PS3 Move0,98
Playstation 30,99
Element 41″ Plasma TV0,99
Current large, flat-screen television0,96
Windows-mount air conditioner0,9
Legacy CRT-Based color television0,7
Legacy flat panel computer monitor0,64
While-LED lighting fixture0,61
Legacy laptop power adapter0,55
Laser Printer0,5
Incandescent lamps1
Fluorescent lamps (uncompensated)0,5
Fluorescent lamps (compensated)0,93
Discharge lamps0,4-0,6

Typical Motor Power Factors:

PowerSpeedPower Factor
(hp)(rpm)1/2 load3/4 loadfull load
0 – 518000.720.820.84
5 – 2018000.740.840.86
20 – 10018000.790.860.89
100 – 30018000.810.880.91

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


Electrical motors constructed according NEMA Design B must meet the efficiencies below:

PowerMinimum Nominal Efficiency1)
(hp)
1 – 478.8
5 – 984.0
10 – 1985.5
20 – 4988.5
50 – 9990.2
100 – 12491.7
> 12592.4


Reference // http://www.engineeringtoolbox.com


Hp to VA conversion table:

HpEficienciaF.pVA
1Hp78%0,84F.p1138,58VA
2Hp78%0,84F.p2277,16VA
3Hp78%0,84F.p3415,75VA
4Hp78%0,84F.p4554,33VA
5Hp84%0,84F.p5286,28VA
6Hp84%0,86F.p6196,01VA
7Hp84%0,86F.p7228,6VA
8Hp84%0,86F.p8261,3VA
9Hp84%0,86F.p9294,01VA
10Hp85%0,86F.p10205,1VA
20Hp85%0,86F.p20410,3VA
30Hp88%0,89F.p28575VA
40Hp88%0,89F.p38100,1VA
50Hp88%0,89F.p47625,12VA
60Hp90%0,89F.p55880,1VA
70Hp90%0,89F.p65193,5VA
80Hp90%0,89F.p74506,86VA
90Hp90%0,89F.p83820,2VA
100Hp90%0,89F.p93133,58VA
200Hp91%0,91F.p180171,47VA
300Hp92%0,91F.p267319,6VA
400Hp92%0,91F.p356426,18VA
500Hp92%0,91F.p445532,7VA
600Hp92%0,91F.p534639,27VA
700Hp92%0,91F.p623745,81VA
800Hp92%0,91F.p712852,36VA
900Hp92%0,91F.p801958,91VA
1000Hp92%0,91F.p891065,4VA
1100Hp92%0,91F.p980172VA
1200Hp92%0,91F.p1069278,54VA
1300Hp92%0,91F.p1158385,09VA
1400Hp92%0,91F.p1247491,63VA
1500Hp92%0,91F.p1336598,1VA
1600Hp92%0,91F.p1425704,73VA
1700Hp92%0,91F.p1514811,27VA
1800Hp92%0,91F.p1603917,82VA