Instruction Manual

PQA400 - PQA823 - PQA824
EN - 108
This screen (Fig. 178) displays, with graphic and numeric indications, the phase delays
expressed in degrees [°] between voltage V31 and current I3. To correctly evaluate this
diagram, it must be remembered that, under purely resistive loads, the angle between the
Delta voltage and the phase current is +30°.
Fig. 178: Phase 3 vector diagram in three-phase 3-wire system or Aron system
The following keys are active on this page:
 The F1 key (or the PAG item on the display) advances to the following page of
saved values relative to the total vector diagram.
 The ESC key (or the smart icon on the display) to exit the function and go back
to the “Recording analysis” page (Fig. 143).
5.5.2.5. Measures
In measure mode, the instrument displays the saved values in TRMS as shown in the
following figures:
In this page, the following symbols are used:
V1N  Neutral - Phase L1 Voltage
V2N  Neutral - Phase L2 Voltage
V3N  Neutral - Phase L3 Voltage
VNPE  Neutral - Ground Voltage
V12  Phase L1 - Phase L2 Voltage
V23  Phase L2 - Phase L3 Voltage
V31  Phase L3 - Phase L1 Voltage
Inv%  % value of the Negative sequence unbalance
Omo%  % value of the Zero sequence unbalance
SEQ  Phase sequence:
”123” => Correct
”132” => Not correct
”023” => No Voltage on B1
”103” => No Voltage on B2
”120” => No Voltage on B3
”100” => No Voltage on B2 and B3
”020” => No Voltage on B1 and B3
”003” => No Voltage on B1 and B2
Hz  Frequency
I1  Current on Phase L1
I2  Current on Phase L2
I3  Current on Phase L3
IN  Neutral Current (not available for PQA400)
Fig. 179: Page 1/5 of numeric values for three-phase 4-wire system