- Joined Oct 3, 2021
@dcbingaman is correct. The basic formulas are Ohm's Law and Watt's Law I = E/RPhase current = 250003 x 415 x 0.8
Watts multiplied by Volts does not give you Amps.
There appears to be something wrong here just from dimensional analysis. Power being voltage times current. I would think the correct formula would be 25e3 (W)/415 (V) = 60Amps * (0.8) = 48 Amps.
Watts over volts gives amps and power factor is a unitless quantity. But I am not 100% sure. I have not dealt much with problems involving 3 phase delta connected synchronous motors.
This is absolutely correct. Angles are dimensionless (unitless) since they are the ratio of two distances. Any transcendental function of a dimensionless quantity is also a dimensionless quantity. Power factor is the cosine of the phase angle between the voltage and current of an AC waveform.... power factor is a unitless quantity....