Answer / Ravi Krishnan

The formula to calculate the fault current (I_{f}) for a MDB (Motor-Generator set) is: I_{f} = sqrt(3) * P / V where: P is the power rating of the MDB in kilowatts (50KW), and V is the voltage rating of the MDB in volts (415V). Therefore, the fault current for a 50KW, 3PH, 415V MDB is: I_{f} = sqrt(3) * 50 / 415 ~ 3.87 A.

can any one tell me the formula for calculating the power and unit consumpetion

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