MI 2892 Power Master
Theory and internal operation
157
In table below summary of all power measurement is shown.
Table 5.3: Summary and grouping of the phase power quantities
Quantity
Combined
powers
Fundamental
powers
Apparent (VA)
S
S
fund
Active (W)
P
P
fund
Nonactive/reactive (var)
N
Q
fund
Line utilization
PF
ind/cap
DPF
ind/cap
Table 5.4: Power summary and grouping of the total power quantities
Quantity
Combined
powers
Fundamental
powers
Apparent (VA)
Sv
Sv
fund
Active (W)
P
P
tot
Nonactive/reactive (var)
N
Q
tot
Line utilization
PFv
ind/cap
DPFv
ind/cap
Combined phase power measurements
All Classic combined phase power measurements are identical with Modern combined phase power
measurement. See 5.1.5 section Combined phase power measurements for details.
Total Vector combined power measurements
Standard compliance: IEC 61557-12 Annex A and IEEE STD 1459-2010 Section 3.2.2.6
Total Vector combined (funda nonfundamental) active, nonactive and apparent power and
total power factor are calculated according to the following equation:
Total active power:
3
2
1
P
P
P
P
tot
[W],
(39)
Total nonactive power (vector):
3
2
1
N
N
N
N
tot
[var],
(40)
Total apparent power (vector):
2
2
tot
tot
tot
N
P
Sv
[VA],
(41)
Total power factor (effective):
tot
tot
tot
Sv
P
PFv
.
(42)
Total Arithmetic combined power measurements
Standard compliance: IEC 61557-12 Annex A and IEEE STD 1459-2010 Section 3.2.2.5
Total Arithmetic combined (funda nonfundamental) active, nonactive and apparent power and
total power factor are calculated according to the following equation:
