The first thing that has to be done is find the amperage of the motor.
Amps = HP x 746/1.73 x E x %eff x pf. Amps = 10 x 746 = 7460/1.73 x 208 x .85 x .86 = 7460/179 = 42 amps.
A standard motor's efficiency between 5 to 100 HP is .84 to .91.
A standard motor's power factor between 10 to 100 HP is .86 to .92.
The formula for kilowatts is kW = I x E x 1.73 x pf/1000 = 42 x 208 x .86 = 7513 kW
Use this kW number times the amount of hours the motor runs to get kW/h. Use that figure for kW/h times the rate you pay for a kW/h in your area to give you the answer that you are looking for.
Yes, most large motors are three phase. Usually single phase motors only go up to 10 HP. Larger than this and the wire size and contactors used to control the motors becomes extreme. For example a single phase 10 HP motor on 115 volts draws 100 amps. The same single phase motor on 230 volts draws 50 amps. The same 10 HP motor on three phase system draws the following amperage; 230 volts is a 28 amp draw, 460 volts is a 14 amp draw and 575 volts is a 11 amp draw. As you can see the higher the voltage becomes, the smaller the wire feeder size is needed and much smaller size contactor can be used to control the motor.
As watts are made of volts times amps, the answer would be 0.660kw.
You didn't mention whether the voltages are single phase or three phase or whether it is a commercial machine or one used in the home. I am assuming that you are asking about a single phase washer. That being said yes, 208 volts can be stepped up to 440 volts. To have the washer converted would mean finding a 440 single phase motor with the identical frame type that would fit the same configuration that the 208 volt single phase motor now resides in. The control voltage for the internal controls would also have to be changed out to the new voltage. The transformer would cost as much as a new machine so that is out of the question. You might want to price out a new 440 volt machine, sell the old 208 machine and the money that you get for the old machine, apply it to the cost of the new machine.
Probably not. The single phase three horse power motor will be much larger in physical size than its three phase counterpart, and will probably not fit.
11000 volts
we can use the formula: Ip=KW/3/volts/pf
Yes, most large motors are three phase. Usually single phase motors only go up to 10 HP. Larger than this and the wire size and contactors used to control the motors becomes extreme. For example a single phase 10 HP motor on 115 volts draws 100 amps. The same single phase motor on 230 volts draws 50 amps. The same 10 HP motor on three phase system draws the following amperage; 230 volts is a 28 amp draw, 460 volts is a 14 amp draw and 575 volts is a 11 amp draw. As you can see the higher the voltage becomes, the smaller the wire feeder size is needed and much smaller size contactor can be used to control the motor.
As watts are made of volts times amps, the answer would be 0.660kw.
To answer this question the voltage of the motor must be given. Watts is the product of amps x volts. Amps = Watts/Volts. Once this is found the motor breaker needs to be larger to allow for the inrush start current.
Dear Sir,I want to know that how much draw starting current of 380 volts 3 phase 50 hertz AC motors as per rating values?
You didn't mention whether the voltages are single phase or three phase or whether it is a commercial machine or one used in the home. I am assuming that you are asking about a single phase washer. That being said yes, 208 volts can be stepped up to 440 volts. To have the washer converted would mean finding a 440 single phase motor with the identical frame type that would fit the same configuration that the 208 volt single phase motor now resides in. The control voltage for the internal controls would also have to be changed out to the new voltage. The transformer would cost as much as a new machine so that is out of the question. You might want to price out a new 440 volt machine, sell the old 208 machine and the money that you get for the old machine, apply it to the cost of the new machine.
Volts x Amps = Watts, divide with 1000 and you get kilowatts.
To find the amperage of a three phase motor, the following equation needs to be used. Amps = HP x 746/1.73 x Volts x % efficiency x power factor. once all of the values are added you can find the amperage of any Horsepower motor at any three phase voltage. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standard motor's power factor between 10 to 100 HP is .86 to .92.
Probably not. The single phase three horse power motor will be much larger in physical size than its three phase counterpart, and will probably not fit.
There is no difference in horsepower. The manufacturer builds the air conditioner. Engineers calculate and tell the manufacturer how much power is going to be required to make it operate. Smaller units will probably use lower voltage with lower horsepower to operate efficiently. The bigger the unit will take higher horsepower to operate. There comes a point when single phase, low voltage use will not work due to the unavailability of high horsepower, low voltage motors. At this point three phase systems are used with higher voltages to operate the motors. Examples of a 10 HP motor at different voltages. Single phase - 115 volts 100 amps, 230 volts 50 amps. Three phase same HP - 200 volts 32.2, 230 volts 28, 460 volts 14 and 575 volts 11 amps. As you can see if the air conditioner needs a 10 HP motor at single phase 115 volts, a feeder supply of 100 amps would be needed. This compared to the same air conditioner using a three phase 575 volt system which draws 11 amps.
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Use the following formula to find the watts used. W = Amps x Volts. Divide that number by 1000. This will give you kWs. Determine how long the motor is to run and multiply this amount by the kilowatts you calculated. This will give you kW/hours. On your utility bill it will be stated how much you pay for a kW/h. Multiply that by your answer and you can estimate how much it costs you to operate the motor.