A 2 horsepower 2 hp motor operates at an efficiency of 75 If

A 2 horse-power (2 hp) motor operates at an efficiency of 75%. If the applied voltage is 220 V, determine the input current.

Solution

Given rating of a motor P = 2 HP = 1.4914 kW

Efficiency of Motor %eta = 75 %

Voltage applied to the motor is V = 220 V

Current drawn by the motor is I = Pin / V

Where Pin is input power given to motor Pin = P/eta = 1491.4/0.75 = 1988.533 W

Current drawn by motor is I = Pin / V = 1988.5333 / 220 = 9.0387 A