User manual
PQM-702, PQM-703 Operating Manual
60
Current positive se-
quence component
I
1
A
where I
A1
, I
B1
, I
C1
are vectors of fundamental current
components I
A
, I
B
, I
C
Operator mag() indicates vector module
Current negative se-
quence component
I
2
A
where I
A1
, I
B1
, I
C1
are vectors of fundamental compo-
nents for phase voltages I
A
, I
B
, I
C
Operator mag() indicates vector module
Current zero sequence
unbalance ratio
i
0
%
Current negative se-
quence unbalance ratio
i
2
%
4.4 3-phase wye without N conductor and delta network
3-phase wye without N conductor and delta network
(parameters: voltage and current, DC voltage and DC current, THD and K factors, symmetrical components and unbalance factors,
flicker are calculated as for 1-phase circuits; instead of the phase voltages, phase-to-phase voltages are used)
Parameter
Method of calculation
Name
Designa-
tion
Unit
Phase-to-phase voltage
U
CA
U
CA
V
Current I
2
(Aron measuring circuits)
I
2
A
Total active power
P
tot
W
where:
U
iAC
is a subsequent sample of voltage U
A-C
U
iBC
is a subsequent sample of voltage U
B-C
I
iA
is a subsequent sample of current I
A
I
iB
is a subsequent sample of current I
B
M = 2048 for 50 Hz and 60 Hz
Total apparent power
S
e
VA
where:
Total reactive power (Bu-
deanu and IEEE 1459)
Q
tot
var
Total Budeanu distortion
power
D
Btot
var