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1HP =746 watts power(watts)= current times voltage ... 746x500=373000. 373000/380= 981.58 so 981.58 amps
AnswerYou have not supplies sufficient information to answer the question.
The load current depends upon the type of motor(d.c./a.c./ single-phase/ three-phase), and the efficiencyof the motor. Before you can calculate the current, you need to determine the input power to the machine, which is always greater than its output power, which you have described as being 500 hp. Once you have determined the input power, and the type of motor, only then can you can calculate the load current
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoYou did not specify everything needed to perform that calculation, so some things have been assumed, such as power factor (PF) = 0.92, efficiency (EFF) = 0.95, and voltage (three phase delta) = 4160.
- 125 HP times 746 watts per HP = 93 KW
- 93 KW divided by PF (0.92) divided by EFF (0.95) = 107 KVA
- 107 KVA divided by 3 = 36 KVA per winding
- 36 KVA divided by 4160 V = 8.5 amperes per winding
- 8.5 amperes times 1.732 (square root of 3) = 14.8 amperes per phase
This is a big motor, requiring special engineering, and most probably a star-delta MCC. You could theoretically run the motor on 480, but then the current would be 128 amperes per phase, drastically increasing the size of the conductors as well as the size of the motor.
Wiki User
∙ 11y ago746w=1hp so .5hp=373w and I=p/v so 373/380= 981.6mA
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Will 220 volt work in a high volt 3 phase motor?
Yes a 208 voltage motor will operate on 220 volts. You have to increase the motor overload protection by 10% of the motor's full load amperage to protect the motor.
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If the nameplate states 20 amps then that is the full load amperage when the motor is running. The start up current on the motor could reach 300% of the FLA depending on the type of motor and the load that is connected to the motor.
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Will 220 volt work in a high volt 3 phase motor?
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If the nameplate states 20 amps then that is the full load amperage when the motor is running. The start up current on the motor could reach 300% of the FLA depending on the type of motor and the load that is connected to the motor.
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What size armoured copper cable needed for 75 kW motor?
Wire sizing is based on the motors full load amperage. The amperage can be calculated but a voltage has to be stated. I = W/E. Amps = Watts/Volts. Restate the question with a voltage and an answer can be given.
What is FLA in electrical terms?
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