HT instruments VEGA78 - Manual (Page 94)

VEGA78
EN - 92
This screen (Fig. 155) displays, with graphic and numeric indications, the phase delays
expressed in degrees [°] between voltage V12 and current I1. 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. 155: Phase 1 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 phase 2 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. 124).
This screen (Fig. 156) displays, with graphic and numeric indications, the phase delays,
expressed in degrees [°], between voltage V2 and current I2, so that the inductive or
capacitive nature of the electrical installation may be found out. In detail:
 Positive angle: Inductive load.
 Negative angle: Capacitive load.
Fig. 156: Phase 2 vector diagram in three-phase 4-wire 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 phase 3 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. 124).