Welcome to the first in a series of articles focusing on electrical calculation basics. This month, we'll discuss the most fundamental of calculations — those for current (I) and kilowatts (kW). We'll also show you how you can do these calculations “in your head,” with very reasonable accuracy, through the use of constants.
Discuss this Article 3
I have a boiler with no data, but I measured the phase current for each phase. The reading is 19A at 380V? How do I calculate the power?
P = 1.73 x V x I x PF =1.73 x 380 x 19 x 0.80 = 9.9kW
or
P = 1.73 x 380 x (3 x 19) x 0.80 = 29.9kW
Which is correct calculation?
how will I know the ideal load on each circuit (single phase electricity?)





