Discuss 3 phase power calculations. in the UK Electrical Forum area at ElectriciansForums.net
can you translate that into english? ?The instantaneous values of S, P and Q (kVA, kW, kVAr) add in quadrature so S² = P² + Q². But the time integrals (kVAh, kWh, kVArh) do not add in this way. The generator kVAh figure is the integral of the vector sum, not the vector sum of the integrals.
It's all adds up, give or take a Knats.can you translate that into english? ?
Sure.
If you walk one mile east and then one mile north, you will be one mile east and one mile north of your starting point, having walked a total of two miles.
If instead you walk 1.4 miles north-east you will still arrive at the same point one mile east and one mile north of your starting point, having only walked 1.4 miles.
You cannot calculate the journey distance (kVAh) from the distance moved east (kWh) and the distance moved north (kVArh) without knowing on which bearings you travelled along the way (cos (φ))
It's mean triangle power can not use?
I see. Now i undestand. Thank you very much ?Not on the cumulative totals, only on the instantaneous value, unless the power factor is exactly constant. If the power factor changes during the counting of the totals, the hypotenuse of the 'triangle' stops being a straight line.
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