MI 2792 PowerQ4 Plus
Operating the instrument
29
(eQ
i
-
, eQ
c
+
) download data to PC and use software PowerView v2.0 in
order to observe results.
Pp, Pt
p: [1..3]
Instantaneous phase active power (P
1
, P
2
, P
3
) or total P
tot
active power
Qp, Qt
p: [1..3]
Instantaneous reactive power (Q
1
, Q
2
, Q
3
, Q
tot
) or total Q
tot
reactive power
Start
Recorder start time and date
Duration Current RECORDER time
Table 3.16: Keys functions
Select between single phase and total energy meter
Energy parameters for phase L1
Energy parameters for phase L2
Energy parameters for phase L3
Summary for all phases energy
Energy parameters for Totals
Toggle between time interval:
Show energy registers for last interval
Show energy registers for current interval
Show energy registers for whole record
Return to the “MEASUREMENTS” menu screen.
3.5 Harmonics menu
Harmonics presents voltage and current signals as a sum of sinusoids of power
frequency and its integer multiples. Power frequency is called fundamental frequency.
Sinusoidal wave with frequency k times higher than fundamental (k is an integer) is
called harmonic wave and is denoted with amplitude and a phase shift (phase angle) to
a fundamental frequency signal. If a signal decomposition with Fourier transformation
results with presence of a frequency that is not integer multiple of fundamental, this
frequency is called interharmonic frequency and component with such frequency is
called interharmonic. See 5.1.8 for details.
3.5.1 Meter
By entering HARMONICS menu from MEASUREMENTS menu the HARMONICS –
METER tabular screen is shown
(see figure below)
. In this screens voltage and current
harmonics or interharmonics and THD are shown.
