Sonel MPI-540 - Vector Diagram of Fundamental Components (Phasor)

MPI-540 ● MPI-540-PV – BRIEF USER MANUAL
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f [Hz] .......................... network frequency,
I [A] ............................ RMS current,
I
h01
[A] ........................ RMS of the fundamental current component,
I
DC
[A] ......................... current constant component,
P [W] .......................... active power,
Q1 or QB [var] ............ reactive power of the fundamental component or reactive power, acc. to Bu-
deanu (depending on the method of calculating reactive power),
S [VA] ......................... apparent power,
S
N
[VA] or D [var] ....... apparent distortion power or Budeanu distortion power (depending on the
method of calculating the reactive power),
E
P+
[Wh] ..................... active energy consumed,
E
P-
[Wh] ..................... active energy returned,
E
Q1+
or E
QB+
[varh] ..... reactive energy consumed,
E
Q1-
or E
QB
- [varh] ...... reactive energy returned,
E
S
[VAh] ..................... apparent energy,
PF ............................... Power factor),
cosφ ........................... displacement power factor,
Pst .............................. short-term flicker factor,
Plt ............................... long-term flicker factor,
U
0
[V] .......................... zero symmetric voltage component,
U
1
[V] .......................... positive sequence symmetrical component of voltage,
U
2
[V] .......................... negative sequence symmetrical component of voltage,
U
2
/U
1
[%] .................... voltage unbalance factor for negative sequence,
U
0
/U
1
[%] .................... unbalance factor for zero component of voltage,
I
0
[A] ........................... current zero symmetrical component,
I
1
[A] ........................... current positive sequence symmetrical component,
I
2
[A] ........................... current negative sequence symmetrical component,
I
2
/I
1
[%] ....................... current unbalance factor for negative sequence,
I
0
/I
1
[%] ....................... current unbalance factor for zero sequence.
5.5.4 Vector diagram of fundamental components (phasor)
After the icon has been selected the phasor diagram appears. It shows the basic layout of com-
ponent vectors of voltages and currents. It may be used to quickly verify the correctness of connect-
ing the recorder to the network.
The following tables are next to the diagram:
o the first, containing information on basic component values and their angles,
o the second, containing the unbalance coefficients of negative components (the coefficients
are only displayed for 3-phase networks).
The nature of the load is signalled by the icon of:
the coil (inductive load) if the angle between the fundamental components of the voltage
and current (φ
Uh1,Ih1
) is greater than zero (voltage is ahead of current),
the capacitor (capacitive load) if the angle φ
Uh1,Ih1
is negative (current is ahead of voltage).