Megger MPQSIM, User Manual

Page: 27 / 72

PRODUCT OPERATION
AVTMMPQSIM Rev 1 May 2017
21
Method # 3 Recording Data
1. Verify the Power Quality instrument connected to the simulator has a
programmed demand interval of no more than 1 minute. This simulation will
require that at least 8 demand intervals are captured. The longer the demand
interval the longer this test will take.
2. Verify the controls are set to their initial settings.
3. Set the Voltage Phase A, B and C Phase Angle selector switches to 11
°
.
4. Start the unit recording.
5. Allow the unit to record for at least 3 demand intervals.
6. Set the Voltage Phase A, B and C Phase Angle selector switches to -30
°
.
7. Allow the unit to record for at least 3 demand intervals.
8. Set the Voltage Phase A, B and C Phase Angle selector switches to 11
°
.
9. Allow the unit to record for at least 2 demand intervals.
10. Stop the recording.
11. View the Displacement Power Factor (DPF).
NOTE: When the phase angle was 30
°
the DPF was positive. When the phase
angle was -30
°
the DPF was 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.