HT Italia VEGA 76, User Manual

Page: 31 / 60

VEGA 76
EN - 29
6.3. POSITION "POWER"
This function permits to display in real time the RMS value of AC/DC voltage, the peak and
ThdV value of the 3 phase voltages, the waveform of the 3 phase voltages, the RMS value
of AC/DC currents, the peak and Thdl of the 3 phase currents, the waveform of the 3
phase currents. Furthermore, the instrument calculates and displays the value of the
phase and total active powers, the value of the phase and total reactive and capacitive
powers, the value of the phase and total power factors and cos
ϕ
.
6.3.1. Symbols
The position POWER has two working modes:
•
METER
•
WAVE
For voltage and current harmonics see paragraphs 6.1.3 and 6.2.3 respectively.
These modes will be described in detail in the next paragraphs.
The symbols used are described below:
Symbol Description
V1, V2, V3 RMS value of the voltage of phase 1, phase 2, phase 3 respectively
V12, V23, V32, V31 RMS Value of the phase to phase voltages
freq Network frequency
Phseq Phase sequence indicator
"123"
→
correct
"132"
→
inverted
"023"
→
null voltage on the black wire
"103"
→
null voltage on the red wire
"120"
→
null voltage on the blue wire
"100"
→
null voltages on the red and blue wires
"020"
→
null voltages on the black and blue wires
"003"
→
null voltages on the black and red wires
I1, I2, I3 RMS value of the current of phase 1, phase 2, phase 3 respectively
IN RMS value of the current of the neutral
Pt, P1, P2, P3 Values of the active power (total, of phase 1, phase 2, phase 3 respectively)
P12, P32 (only for 3-wire measurement) Value of the power measured by the Wattmeter 1-2
and 3-2 respectively (see paragraph 16.3.2).
Qt, Q1, Q2, Q3 Values of the reactive power (total, of phase 1, phase 2, phase 3 respectively)
Q12, Q32 (only for 3-wire measurement) Value of the power measured by the VAR meter
Va1-2 and 3-2 respectively (see paragraph 16.3.2).
St, S1, S2, S3 Values of the apparent power (total, of phase 1, phase 2, phase 3 respectively)
S12, S32 (only for 3-wire measurement) Value of the power measured by the VA meter Va1-2
and 3-2 respectively (see paragraph 16.3.2).
Pft, pf1, pf2, pf3 Values of the power factors (total, of phase 1, phase 2, phase 3 respectively)
dPft, dpf1, dpf2, dpf3 Value of the cos
ϕ
(total, of phase 1, phase 2, phase 3 respectively)
Ead, Pd Values of the Total Active Energy and Active Power On demand respectively
Esd, Sd Values of the Total Apparent Energy and Apparent Power On demand respectively
Tab. 3: Symbols used in the position POWER
The symbols " i " and " c " stand for reactive powers (Q), power factors (Pf) and cos
ϕ
(dpf)
respectively inductive and capacitive.