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7.11 Harmonic Measurement Specifications
Measurement Functions
during Harmonic Measurement
Wiring system
UΣ [V]
IΣ [A]
PΣ [W]
SΣ [VA]
(TYPE3)*
QΣ [var]
(TYPE3)*
λΣ
* For details on the type of SΣ and QΣ equations, see section 5.9 in the User's Manual IM WT3001E-01EN.
7-44
Single-phase,
three-wire (1P3W)
(U1 + U2) / 2
(I1 + I2) / 2
Note
• The numbers 1, 2, and 3 in the equations UΣ, IΣ, PΣ, SΣ, and QΣ indicate the case when
input elements 1, 2, and 3 are set to the wiring system shown in the table. If elements 2, 3,
and 4 are set to the wiring system shown in the table, replace the numbers 1, 2, and 3 with 2, 3,
and 4, respectively.
• For Σ, only the total value and fundamental wave (1st) are computed.
Method of Determination, Equation
Three-phase,
Three-voltage,
three-wire (3P3W)
three-current (3V3A)
P1 + P2
PΣ
2
+ QΣ
2
Q1 + Q2
PΣ
SΣ
(Table 3/3)
Three-phase,
four-wire (3P4W)
(U1 + U2 + U3) / 3
(I1 + I2 + I3) / 3
P1 + P2 + P3
Q1 + Q2 + Q3
IM WT3001E-51EN
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