Since 1 HP=745.7W, 120 HP=89484W. If you're using DC, then your volt amp combination must satisfy the equation: 89484W=V*I. If you're using AC, then you must satisfy the equation: P=|V|*|I|*cos(ang(V)-ang(I)) P is average power, also known as real power. You want this value to be 89484W |V| is the voltage magnitude in rms (rms is what measuring equipment shows. US residential homes normally have 120V rms) (rms=root mean squared) |I| is the current magnitude in rms ang(V) is the phasor angle of the voltage ang(I) is the phasor angle of the current
A 5 horsepower motor would have 3,730 watts of power.
A motor that draws 14 amps on 240 volts is probably a two horsepower motor, but it could be three depending on the efficiency.Watts = amps x volts. There are 746 watts in 1 horsepower.CommentIn North America, horsepower is always used to describe the output power of a motor. You can only find the input power by multiplying the supply voltage by the load current. You will, unfortunately, then need to know the efficiency of the machine to determine its output power in horsepower.
How to convert horsepower to amps? You'd have to make an assumption about volts. If it's running at 220 volts, that would make it 34 Amps. There are 746 watts in a horsepower and Amps = Watts/Volts.
It depends on the power factor. For a typical power factor of 0.92, 75kva would be equal to 69kw, which would be equal to 9.25 horsepower (electric motor).
To convert horsepower (hp) to kilowatts (kw), you can use the conversion factor of 0.746. Therefore, for a 100 hp motor, the power in kilowatts would be 100 hp * 0.746 = 74.6 kW.
Normally you would specify a motor to do a particular job by the mechanical power output you require.A motor takes electrical power "in" and produces mechanical power "out".Read whatever it says on the motor's rating plate or user-guide.The mechanical energy output of a motor is measured in various units around the world: for example in watts, horsepower (or brake horsepower).Another answerThe above answer is quite correct in stating that a motor's output power is its rated power as it's a guide to how much load it can drive.Power is simply a rate - the rate of transfer of energy. The horsepower is the Imperial unit of power, whereas the watt is the SI unit of power. In the US the output power of a motor is typically still measured in horsepower whereas in Europe the use of horsepower is almost obsolete, except for small "fractional horsepower" electric motors, and both the input power and the output power of a motor are measured in watts or, more likely, kilowatts.
You still need the same horsepower. The advantage of the three-phase motor is that it will draw lower current.
This is the formula for horsepower. HP = I x E x 1.73 x %eff x pf./746. The efficiency of the motor will have to be guessed at along with the power factor. A motor has a lagging power factor so will use a value of .85. For the efficiency of the motor lets say 90%. The value of 746 is the amount of watts in one horsepower. Now applying the values we end up with a HP value. HP = 1.7 x 480 x 1.73 x 90 x .85/746 = 1080/746 = 1.45 horsepower.
Motors are rated according to their output power, never their input power. This is because it is the output power that determines the load the motor will be able to handle. The output power, of course, is lower than the input power due to the machine's losses.In North America, the output power is generally expressed in horsepower, whereas its input power is measured in watts. In the rest of the world, the horsepower is considered obsolete, so both the output power and the input power are measured in watts.As there are 746 W to the horsepower, your 75 kW output motor would be equivalent to approximately 100 horsepower.
3 amps on 120 volts is almost 1/2 hp. To be exact 0.48 hp, that's why I said almost 0.5 hp or 1/2 hp. So say you are thinking of buying a 3 amp grinder or table top sander and you want to know about how many HP (Horse Power) it is, the answer is 120 volts X 3 amps = 360 X 0.00134 = 0.4824 HP which is almost a 1/2 HP you can do the math from there if its a 6 amp motor then its almost a 1 HP motor or to be exact 0.4824 X 2 = 0.9648 also almost 1 HP. This is if you are on 120 volts. If you are on 110 or 125 volts its about the same.
For a single phase 3 HP motor at 208 volts the amperage is 18.7 amps. For a three phase 3 HP motor at 208 volts the amperage is 10.5 amps. This figure is derived at by taking the full load amps at 230 volts and adding 10%. As the voltage goes down the amperage goes up. For 200 volt motors 15% is added to the FLA of a 230 volt motor.
To calculate horsepower, you can use the formula: Horsepower = (Volts x Amps x Efficiency) / 746. Using 110 volts and 15 amps, and assuming 90% efficiency, the formula would be: (110 x 15 x 0.9) / 746 = 1.49 horsepower.