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75
Appendix A
Measurement Calculation Method
Measurement
Function
Calculation Formula
RMS
DC component
AC component
Rectified Mean
Corrected
Rectified Mean
Peak+
Peak-
Peak to Peak
U
rms
u
2
=
U
Σ
U
A
U
B
U
C
++
3
----------------------------------=
I
rms
i
2
=
I
Σ
I
A
I
B
I
C
++
3
---------------------------=
U
DC
u=
U
DC
u=
U
AC
U
rms
2
U
DC
–
2
=
I
AC
I
rms
2
I
DC
–
2
=
U
rm
u=
I
rm
i=
U
rmc
π
22
----------
U
rm
=
I
rmc
π
22
----------
I
rm
=
U
p+
MAX u()=
I
p+
MAX i()=
U
p-
MIN u()=
I
p-
MIN i()=
U
pp
U
p+
U
p-
–=
I
pp
I
p+
I
p-
–=
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