METREL power master MI 2892, Instruction Manual

Page: 158 / 207

MI 2892 Power Master Theory and internal operation
158
Total active power:
3 2 1
P P P P
tot
  
[W],
(43)
Total apparent power (arithmetic):
3 2 1
S S S Sa
tot
  
[VA],
(44)
Total nonactive power (arithmetic):
2 2
tot tot
tot
P Sa Na
 
[var],
(45)
Total power factor (arithmetic):
tot
tot
tot
Sa
P
PFa

.
(46)
Fundamental phase power measurements
Standard compliance: IEEE STD 1459-2010
All Classic fundamental phase power measurements are identical with Modern fundamental phase
power measurement. See 5.1.5 section Fundamental phase power measurements for details.
Total Vector fundamental power measurements
Standard compliance: IEC 61557-12 Annex A and IEEE STD 1459-2010 Section 3.2.2.6
Total Vector fundamental active, reactive and apparent power and total displacement vector power
factor are calculated according to the following equation:
Total fundamental active power:
3 2 1 fund fund fund
fundtot
P P P P
  
[W],
(47)
Total fundamental reactive power (vector):
3 2 1 fund fund fund
fundtot
Q Q Q Q
  
[var],
(48)
Total fundamental apparent power (vector):
2 2
fundtot fundtot fundtot
N P Sv
 
[VA],
(49)
Total displacement power factor (vector):
fundtot
fundtot
tot
Sv
P
DPFv

.
(50)
All fundamental power measurements are calculated from fundamental voltages and currents obtained
from harmonic analysis (see section 5.1.8 for details).
Total Arithmetic fundamental power measurements
Standard compliance: IEC 61557-12 Annex A and IEEE STD 1459-2010 Section 3.2.2.5
Total Arithmetic fundamental active, reactive and apparent power and total displacement arithmentic
power factor are calculated according to the following equation:
Total fundamental active power:
3 2 1 fund fund fund
fundtot
P P P P
  
[W],
(51)
Total apparent power (arithmetic):
3 2 1
S S S Sa
fundtot
  
[VA],
(52)