Megger MPQSIM, Руководство пользователя

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M
AVTMMPQSIM Rev 1 May 2017
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4. Harmonic Bar Chart
a. View the waveforms on the Scope screen of the MPQ Analyzer. Scroll through the
phases.
b. Turn ON the Voltage Harmonics switch on the PQ Simulator. The harmonics are
displayed.
c. Turn OFF the Voltage Harmonics switch ON the PQ Simulator.
5. Phase Angles
a. View the Vectors on the Unbalance screen of the MPQ Analyzer.
b. Change the Current phase angles on the PQ Simulator. View the changes on the
vector diagram.
c. Set the Current phase angles on the PQ Simulator back to nominal.
6. Source Reversal
a. View the demand values on the DVM screen of the MPQ Analyzer.
b. Set the Power Direction Switch on the PQ Simulator to SINK. The KW values are
now negative, indicating reversed power flow .
NOTE: This can also be viewed in the scope mode and in the unbalance vectors
as currents being 180
°
out of phase.
c. Set the Power Direction Switch on the PQ Simulator to SOURCE.
7. Leading/Lagging Current
a. View the Waveforms on the Scope screen of the MPQ Analyzer.
b. Change the Current phase angle on the PQ Simulator to -30
°
. The current now lags
the voltage. This is indicative of an inductive load, such as a motor .
c. View the Vectors on the Unbalance screen of the MPQ Analyzer.
d. View the phase rotation caused by a lagging current.
e. Change the Current phase angle on the PQ Simulator to +11 ° .
f. View the Waveforms on the Scope screen of the MPQ Analyzer.
The current now leads the voltage. This is indicative of a capacitive load, such as a cap bank .
g. View the Vectors on the Unbalance screen of the MPQ Analyzer.
NOTE: The phase rotation caused by a leading current.
h. Set the Current phase angles on the PQ Simulator back to nominal.