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What is horse power of a 415 volt 3 phase 7.5 kW electric motor?
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.
What is the break drum radius for a single phase induction motor?
The correct spelling is 'brake' rather than 'break', but the 'drum' you refer to is used when testing the output power at the shaft of an induction motor. The diameter will depend on the power of the motor, and the test equipment used. 'Brake power' refers to the output power of the machine measured in watts or, in the United States, in horsepower. If you know the output power (by conducting this test) and the input power (using a wattmeter), then you can determine the machine's efficiency.
Does a 100 watt dc motor put out 100 watts in reverse?
Yes it can but it is a bit more complicated then that. The motor that is rated at 100 Watts will draw 100 watts electrical power, but will only output 70-80% of that in mechanical power. So in order to get 100 watts back out you would have to put in ~120 watts of mechanical power to get 100 watts electrical back out.
How many watts does a freezer motor uses?
a freezer morter got 60 watts in it or 90 watts
What is the approximate horsepower rating of a 240V motor that draws 15.5A of current?
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 do you calculate electrical efficiency?
Electrical efficiency is calculated by dividing the useful output power (in watts) by the input power (in watts) and multiplying by 100 to get a percentage. The formula is: Efficiency = (Useful output power / Input power) * 100. The higher the percentage of efficiency, the more effective the electrical system is at converting input power into useful output power.
What is the efficiency of a dc generator that requires 200 watts of energy to supply 160 watts of output power?
The efficiency of a DC generator can be calculated using the formula: Efficiency (%) = (Output Power / Input Power) × 100. In this case, the input power is 200 watts and the output power is 160 watts. Thus, the efficiency is (160 W / 200 W) × 100 = 80%. This means the generator operates at 80% efficiency.
If the output of the secondary of a transformer is 1300 watts and the input of the primary is 1800 watts the percentage efficiency would be?
72 percent
What is percentage of efficiency if a power supply produces a 0.5 Watts output with an input of 0.6 Watts?
You need to divide the output power by the input power. If you want to express that as a percentage, you would also multiply this result by 100.
How many watts does a single phase 3HP 220V motor use?
1 kp=746w1.5 hp=1119w ( 746+(746/2) )AnswerIt depends upon whether you are referring to the machine's input or output power. In North America, horsepower is still used to define a motor's output power (elsewhere in the world, the watt is used). To convert this into watts, you need to multiply by 746. However, if you want to know the input power, you must take the efficiency of the motor into account, because the input power is always higher than the output power.
The efficiency of an electric motor is given by the expression?
mu = output power / input power; where mu is the efficiency input power can be calculated from P = IV ; where P is power, I is current, and V is voltage. output power can be calculated from P = Fv ; where P is power, F is applied force, and v is the velocity.
How many watts does a 3 phase 20 hp motor use?
You would need to know the efficiency of the motor to determine its input power, which would, of course, exceed its output power of (20 x 746 =) 14.92 kW.
How many electricity consume 5HP motor in 1 hour?
I assume you are asking how much energy a 5-hp motor will consume in one hour?The first thing to understand that a motor is rated according its output power which, in North America, is expressed in horsepower and, elsewhere, in watts. So, the output power of your motor is 5 hp, which is equivalent to 5 x 746 = 3730 W.Next, you need to find out its full-load efficiency. You then need to divide the output power by the efficiency to determine its input power -remember, input power is always higher than the output power.Once you have found out its input power, convert that into kilowatts and multiply it by one (hour) to determine the energy used in kilowatt hours.
How do you calculate efficiency of air compressor?
One measure of efficiency is power output/power input. Assuming that you have in the input power to the compressor in watts, the output flow rate in liters per minute, and the output pressure in bar(absolute), then the formula for efficiency is (V * 100 * ln (P))/Input Where v is flow rate in liters per second referenced to atmospheric pressure, P is pressure in bar, and Input is power to the compressor in watts. This also assumes that the input air is roughly atmospheric pressure and near room temperature, and the output air has cooled back to near room temperature. A rule of thumb is that 1 hp into a compressor will generate 4cfm at 100psi. Lets see what efficiency that is. 1 cfm = 1cu ft * 28.3 liter/cu ft * 1 minute/60 second = 0.472 liters per sec 100psig = 115psia = 7.9 bar absolute 4 cfm = 4*0.472 lps = 1.89 lps 1.89 * 100 * log-natural (7.9) = 390 watts of output power 1 horsepower = 746 watts. 390/746 = 52% efficiency
What is wattage rating of microwave oven transformer also hi voltage from secondary?
The rating is about 1500W. This is for both the input and the output. Output voltage is usually 2,000 volts. Divide watts by input volts to get input current. And divide watts by output voltage to get output current. -Joe
How do you figure out how many kilowatts a 10 hp 3 phase motor will use?
10 hp is its output power. To determine its inputpower, you need to know its efficiency, then use the following equation:efficiency = (output power)/(input power)You will first have to convert 10 hp into watts. There are 746 W in one horsepower.
How many amps does half hp motor single phase?
Presumably you mean 'rated full-load current'? The thing to remember is that motors, whether rated in horsepower (North America) or watts (practically everywhere else), are rated according to their output power. Because motors are not 100% efficient, the input power is always somewhat higherthan the output power. 0.5 horsepower is equivalent to about 373 W output power. If we assume that the motor runs at, say, 90% efficiency at its rated output, this means its input power will be around 414 W. To determine its input current you must then divide its input power by the rated supply voltage.
