A three-phase electric motor is included in the 220 V network and consumes a current of 10 A.
| May 6, 2021 | education
A three-phase electric motor is included in the 220 V network and consumes a current of 10 A. Cos φ of the motor is 0.85, efficiency is 80%. Determine the power on the motor shaft.
To find the power on the shaft of the considered three-phase electric motor, we will use the formula: P = U * I * cosφ * √3 * η / 1000.
Variables: U – mains voltage (U = 220 V); I – consumed current (I = 10 A); cosφ – power factor (cosφ = 0.85); η – efficiency of the considered three-phase electric motor (η = 80% = 0.8).
Calculation: P = U * I * cosφ * √3 * η / 1000 = 220 * 10 * 0.85 * √3 * 0.8 / 1000 = 2.59 kW.
Answer: The shaft power of the three-phase electric motor under consideration is 2.59 kW.
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