UG-572 Datasheet, PDF (16/20 Pages) Winchester Electronics Corporation – C JACK

UG-572
TOTAL HARMONIC DISTORTION
The Total Harmonic Distortion window is shown in Figure 25.
This window shows the percentage of the harmonics in the rms
reading out of the fundamental rms reading. Refer to the Total
Harmonic Distortion Calculation section in the data sheet.
• Under the Channel X headings, the top row consists of the
respective register readings. Below this row is the
Percentage Harmonics out of Fundamental.
• Exit returns to the main menu.
• Read reads the current configuration of the part and the
energy register values.
Figure 25. Total Harmonic Distortion Window
FUNDAMENTAL ACTIVE POWER
The Fundamental Active Power window is shown in Figure 26.
This window is very similar to the Total Active Power window.
The registers are setup to reflect the fundamental active power.
• On the left, SELFREQ is used to select the frequency of the
power line being used. Setting the correct line frequency
speeds up the fundamental calculations.
• VLEVEL is the trigger level for the fundamental based on
the following equation:
VLEVEL = ^VFS × 4 ×10⁶
V_n
• Exit returns to the main menu.
• Read reads the current configuration of the part and the
energy register values.
• Write writes the current configuration to the registers.
• See the Total Active Power section for all other settings.
EVAL-ADE7978EBZ User Guide
Figure 26. Fundamental Active Power Window
FUNDAMENTAL REACTIVE POWER
The Fundamental Reactive Power window is shown in
Figure 27. This window is similar to the Total Reactive Power
window. The registers are setup to reflect the fundamental
reactive power.
• On the left, SELFREQ is used to select the frequency of the
power line being used. Setting the correct line frequency
can speed up the fundamental calculations.
• VLEVEL is the trigger level for the fundamental based on
the following equation:
VLEVEL = ^VFS × 4 ×10⁶
V_n
• Exit returns to the main menu.
• Read reads the current configuration of the part and the
energy register values.
• Write writes the current configuration to the registers.
• See the Total Reactive Power section for all other settings.
Figure 27. Fundamental Reactive Power Window
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