Rms (Neutral); Measurement Of Total Harmonic Distortion (Thd); Thd (3U) - AEMC PowerPad III 8336 User Manual

5.3.1.4 RMS (NEUTRAL)

This screen displays the neutral voltage relative to ground and the neutral current.
Item Function
1 Instantaneous value cursor; change values with the cursor using the ◄ and ► buttons
2
Effective values of RMS voltage and current
Instantaneous value of the signals at the intersection of the cursor and the graphs
t: time relative to the start of the period (expressed in milliseconds)
3
VN: instantaneous neutral voltage
AN: instantaneous neutral current
NOTE: Filters L1, L2, and L3 display the current and voltage in phases 1, 2, and 3, respectively. The screen is identical to
the one displayed for the neutral.

5.3.2 MEASUREMENT OF TOTAL HARMONIC DISTORTION (THD)

The THD sub-menu displays the waveforms of the signals measured over one full cycle and the total voltage and current
harmonic distortion. The levels are displayed either with the fundamental RMS value as reference (%f) or with the RMS
value without DC as reference (%r), depending on which reference is chosen in the Configuration menu.

5.3.2.1 THD (3U)

This screen displays the phase-to-phase voltage waveforms for one period and the total harmonic distortion values.
Power Quality Analyzer PowerPad
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III Model 8336
®
02/06/14
Figure 5-30
Figure 5-31
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