| ratio of the absolute value of the fundamental active power P1 to the fundamental apparent power S1 λ1 = |P1| / S1 Note 1 to entry: The fundamental power factor is also given by: λ1 = |cos φ1| Note 2 to entry: The fundamental power factor only refers to fundamental quantities. Note 3 to entry: The fundamental power factor is sometimes called displacement factor or displacement power factor.
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