How to Read An Electric Motor Nameplate Power FactorPower factor is indicated on the nameplate as either “PF” or “P .F” or cos φ . Power factor is an expression of the ratio of active power (W) to apparent power (VA) expressed as a percentage.Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20