Remarks To The Measuring Quantities - Siemens SICAM P 7KG7750 Manual

3
3.2 Formulas and Calculation of Derived Quantities
3.2.2

Remarks to the Measuring Quantities

Note 1
N: Nominal value of the counting pulses per period at nominal value of the system frequency
T: Nominal value of the period length of the system frequency in µs
P: Counted pulses within one period
V: Asymmetry
G: Unbalanced system
M: Balanced system
M : Vector of the measured quantity, U
n
Note 2
No. of Equation
1
2
3
4
5
6
46
or I
LN
= +
2 2
G A B
⎛
ϕ
= +
⎜
A M M cos
1 2 12
⎝
⎛ ⎞
2
ϕ π
= −
⎜ ⎟
B M sin
2 12
⎝ ⎠
3
= +
2 2
M C D
⎛
ϕ
= +
⎜
C M M cos
1 2 12
⎝
⎛
2
ϕ π
= +
⎜
D M sin
2 122
⎝
3
, from Fourier transformation
L
Equation
⎞ ⎛
2
π ϕ
− + +
⎟ ⎜
M cos
3 13
⎠ ⎝
3
⎛ ⎞
2
ϕ π
+ +
⎜ ⎟
M sin
3 13
⎝ ⎠
3
⎞ ⎛
2
π ϕ
+ + −
⎟ ⎜
M cos
3 13
⎠ ⎝
3
⎞ ⎛ ⎞
2
ϕ π
+ −
⎟ ⎜ ⎟
M sin
3 13
⎠ ⎝ ⎠
3
Power Meter SICAM P 7KG7750/55, Manual
E50417-B1076-C340-A6, Edition 09.2013
⎞
2
π
⎟
⎠
3
⎞
2
π
⎟
⎠
3