Megger MPQSIM, Руководство пользователя

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M
AVTMMPQSIM Rev 1 May 2017
20
Displacement Power Factor (Leading and Lagging Current)
Verify the Power Quality instrument connected to the simulator is programmed to
record power in a 4-wire wye 3-wattmeter configuration.
Method # 1 Real Time Demand DVM Screen
1. Verify the controls are set to their initial settings.
2. Set the Phase A, B and C Current Phase Angle selector switches to -11
°
.
3. View the real time demand (DVM screen) and note the DPF for each channel is
positive.
4. Set the Phase A, B and C Current Phase Angle selector switches to 11 ° .
5. View the real time demand (DVM screen) and note the DPF for each channel is
negative.
NOTE: When the load is inductive (as in a motor) the current lags the voltage.
This will be seen as a positive displacement power factor (DPF). When
the load is capacitive (as in a cap bank) the current leads the voltage.
This will be seen as a negative displacement power factor (DPF).
The sign of the DPF will always equal the sign of the KVAR.
Method # 2 Real Time Demand Scope Screen
1. Verify the controls are set to their initial settings.
2. Set the Phase A Phase Angle selector switch to -30
°
.
3. View the Phase A voltage and current on the scope screen.
4. Note the current lags the voltage.
5. Set the Phase A Phase Angle selector switch to 11
°
.
6. View the Phase A voltage and current on the scope screen.
NOTE: The current now leads the voltage.
NOTE: When the load is inductive (as in a motor) the current lags the voltage.
This will be seen as a positive displacement power factor (DPF). When
the load is capacitive (as in a cap bank) the current leads the voltage.
This will be seen as a negative displacement power factor (DPF).
The sign of the DPF will always equal the sign of the KVAR.