202
Reactive-Power-Meter Method ON
Harmonic-power phase angle
Both active power and reactive power have polarities, and the
results are expressed by "0
°
to
±
180
°
". This enables identification
of inflow and outflow and lag (-) and lead (+).
Reactive-Power-Meter Method OFF
Harmonic-power phase angle
Active power has polarities, but apparent power does not. The
results are expressed by "0
°
to +180
°
". Identification of inflow and
outflow is possible, but that of lag (-) and lead (+) is not. Due to the
difference in arithmetic expression, the harmonic-power phase
angle may differ if the three-phase load is unbalanced.
φ = tan
-1
[°]
Q
P
φ = cos
-1
[°]
P
S
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