True Rms Current And Voltage - AEMC PowerPad III 8336 User Manual

NOTE: The PEAK button is not displayed when the inrush current capture recording mode is RMS only.
In the PEAK display, the available information is:
● The instantaneous current and voltage at the time indicated by the cursor (in a "waveform" representation).
● The maximum instantaneous current and voltage in the half-cycle indicated by the cursor (in an "envelope"
representation).
● The maximum instantaneous absolute value of the current and voltage (over the entire capture).
In the RMS display, the available information is:
● The instantaneous frequency at the time indicated by the cursor.
● The minimum, mean, and maximum instantaneous values of the frequency over the entire capture.
● The RMS current and voltage in the half-cycle (or lobe) on which the cursor is positioned.
● The maximum half-cycle RMS current and voltage (over the entire capture).
A voltage must be present on the phase before the motor start-up for a stable and correct frequency control.

5.1.3 TRUE RMS CURRENT AND VOLTAGE

RMS mode displays the record of the trend of the true half-cycle RMS current and voltage, and the frequency trend graph.
The display depends on the type of selection filter:
● 3V: displays the three voltages during the inrush current capture for set-ups with neutral
● 3U: displays the three voltages during the inrush current capture for set-ups without neutral
● 3A: displays the three currents during the inrush current capture
● L1, L2, L3: display the current and voltage in phases 1, 2, and 3 respectively (for set-ups with neutral only)
● Hz: displays the evolution of the network frequency vs. time
The following section show four display examples.
3A RMS DISPLAY SCREEN FOR A 3-PHASE CONNECTION WITH NEUTRAL
Item Function
Instantaneous value cursor; change values with the cursor using the ◄ and ► buttons
1
2 Scale of values
- Maximum half-period RMS value of the Inrush current capture
3
- Indicator of number attributed to the displayed curve
- Value of the measured current
Power Quality Analyzer PowerPad
1
2
III Model 8336
®
Figure 5-9
3
4
5
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