What is the load current if the power factor is 1.0 or100 percent?
A power factor of unity indicates that the load current is in phase with the supply voltage, so is supplying a purely resistive load.
If power factor is increased, current will be reduced for a specific real power (kWs) relative to before. Total power is real power plus the vector of reactive power (you have to do polar math). So total current = (current from real power) + (current from reactive power). By changing the power factor, you decrease the second quantity. Go to Wikipedia.com and search for Power Factor if you need a more extensive description.
Effective Power = Volts x Amps x Power Factor Power Factor ranges from 0 to 1. At a Power Factor of 1 the load is pure resistive and the current and voltage are exactly in phase. As the voltage and current get out of phase the Power Factor decreases and you reduce the power. Therefore, a Power Factor of 1 is most efficient.
How do you find the power input if you have the power factor and power output and voltage and current?
When power factor is at unity, the voltage and current waves are aligned or in phase with one another. Since power is the product of voltage and current, power transfer is maximized at unity power factor. When power is transmitted at a lower power factor, greater current is required to deliver the same amount of power. When current is increased, the size of the transmission, distribution and generation systems, all have to be increased accordingly…