Power factor measurement circuit

The active power of the load P=UlcosSo, where
cosp is the power factor. Power factor angle,
    XL. -xf. '
    rp=arctan—■ir一
  and-90'≥cip<90. . If b, c, and d in Figure 6-5 are connected to the circuit as loads respectively
, then
    when Z=R, p=o, cO prints one l, which is a resistive load;
    when Z=5, tp>0, costp> 0, inductive load;
    when Z-mo:, p<0, cosp>0. Customer load.
It can be seen that the size and nature of the power factor are determined by the size and nature of the load parameters.