3-phase 3-wire wiring on the PW3337

QWhat is the difference among 3P3W, 3P3W2M, 3V3A and 3P3W3M when measurinng a 3-phase 3-wire circuit?


The 3-power-meter method is applied to 3P3W3M wiring, while the others (3P3W, 3P3W2M and 3V3A) use the 2-power-meter method.

[ 3P3W, 3P3W2M, 3V3A ]
Psum is the same for 3P3W, 3P3W2M and 3V3A.
  Psum = P1 + P2
The difference is how to use U3 and I3 which is not used to calculate the Psum.
  3P2W:  Does not display U3 and I3.
  3P3W2M:  Displays U3 and I3 as the result of vectoral calculations.
  3V3A:  Measures U3 and I3 and displays the values.