User manual
4 Calculation formulas
59
Total reactive energy of
fundamental component
(consumed and supplied)
E
Q1+tot
E
Q1-tot
varh
calculated as for the split-phase network
Total apparent energy
E
Stot
VAh
where:
i is subsequent number of the 10/12-period measure-
ment window
S
e
(i) represents the effective apparent power S
e
, calcu-
lated in i-th measuring window
T(i) represents duration of i-th measuring window (in
hours)
RMS value of zero volt-
age sequence
U
0
V
where U
A1
, U
B1
, U
C1
are vectors of fundamental compo-
nents of phase voltages U
A
, U
B
, U
C
Operator mag() indicates vector module
Voltage positive se-
quence component
U
1
V
where U
A1
, U
B1
, U
C1
are vectors of fundamental compo-
nents of phase voltages U
A
, U
B
, U
C
Operator mag() indicates vector module
Voltage negative se-
quence component
U
2
V
where U
A1
, U
B1
, U
C1
are vectors of fundamental compo-
nents of phase voltages U
A
, U
B
, U
C
Operator mag() indicates vector module
Voltage zero sequence
unbalance ratio
u
0
%
Voltage negative se-
quence unbalance ratio
u
2
%
Current zero sequence
component
I
0
A
where I
A1
, I
B1
, I
C1
are vectors of fundamental compo-
nents for phase currents I
A
, I
B
, I
C
Operator mag() indicates vector module