David Knight said:
Hi all
Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.
I know the voltage and the amps but how do i calc the PF factor??
Please help its driving me made
David Knight said:
Hi all
Please can someone help me, i am trying to calc the PF factor of my heavyduty machines.
I know the voltage and the amps but how do i calc the PF factor??
Please help its driving me made
Dear Davis ;
First, if you know the Voltage, the current of the machine, the kind of machine ” Sigle phase or 3 phases “, and the power of the machine, you can do a simple calculation to have the value of Cos φ, where :
– For Single phase machine : P = V x I x Cos φ
– For 3 phases machine : P = 1.73 x U x I x Cosφ
Noting that :
– V : value of voltage betwwen phase & neutral
– U : value of voltage between 2 phases.
– I : the current of the machine
but, if you don't know the power of the machine, so you should either measure directly the value of Cos φ.
regards.