METREL MI 2893 User Manual

MI 2893 / MI 2892 / MI 2885 Measurement methods
185
Positive sequence apparent power:

 IUS
tot
3
[VA],
(23)
Positive sequence power factor:




tot
tot
tot
S
P
DPF
.
(24)
U
+
, U
-
, U
0
and 
+
are obtained from unbalance calculus. See section 5.1.11 for details.
Nonfundamental phase power measurements
Standard compliance: IEEE STD 1459-2010
Nonfundamental power measurements are measured according to following equations:
Phase nonfundamental apparent power:
222
HpVpIpNp
SDDS 
[VA], p: 1,2,3
(25)
Phase current distortion power
IpfundPIp
THDSD 
[VA], p: 1,2,3
(26)
Phase voltage distortion power:
UpfundPVp
THDSD 
[var], p: 1,2,3
(27)
Phase harmonic apparent power
IpUpfundPHp
THDTHDSS 
[var], p: 1,2,3
(28)
Phase active harmonic power:
fundPpHp
PPP 
[W], p: 1,2,3
(29)
Phase harmonic distortion power
22
HpHpHp
PSD 
[var], p: 1,2,3
(30)
Total nonfundamental power measurements
Standard compliance: IEEE STD 1459-2010
Total nonfundamental power quantities are calculated according to the following equations:
Total nonfundamental effective apparent power:
222
tottottottot
HVIN SeDeDeSe 
[VA]
(31)
270
0
+DPFind
Lead
Lag
+DPFcap
-DPFcap
-DPFind
180
0
90
0
0
0
+P
+
-P
+
-Q
+
+Q
+
I
II
III IV

METREL MI 2893 Specifications

General

Brand	METREL
Model	MI 2893
Category	Measuring Instruments
Language	English