Question

a motor gives an output power of 20kw and operates with an efficiency of 80%. if the constant input voltage to the motor is 200V what is the constant supply current​

Answer 1

Answer:

156 A

Step-by-step explanation:

The output is 20 KW and efficiency is 80%, so input power is 20/.8 = 25 KW.

Input current = power/ voltage = 25000/200 = 125 A

This assumes that the motor is running at unity power factor or that the power factor has been corrected by adding a capacitor.

If not, a realistic power factor will be .8. So input current = 125/.8 = 156 A

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