To DOWNTIME: Three-phase installations can be managed as an aquivalent one-phase installation as follows:
- Consider voltage line-to-neutral (or phase-to-phase voltage divided into square root of 3) as equivalent one-phase voltage
- Consider one phase powers (three phase powers divided into three) as equivalente one-phase powers
- Consider current line itself as equivalent one-phase current.
- Power phactor is the same for three than for one-phase systems.
Then you can deal whith these values an add currents as stated by NornaGa or steviesparkie , or add reals, and reactive powers as suggested by myself.
If one machine has a power factor of 0.09 and another has one of 0.6, and the current on both machines is the same as well as the voltage, then the real or actual or active power
of both are:
P1 = VxIx0.09 and P2 = VxIx0.6
Let's say: P1/P2 = .09/.6 = 0.15 Julian