9
3.11.2 Display functions
• Bar charts of harmonics.
• "Inrush" recording (starting current): display of
parameters useful for studying the starting of a
motor.
- Instantaneous value of the current at the time
indicated by the cursor.
- Maximum instantaneous value of the current
(for the whole start).
- RMS value of the half-period (or lobe) of the
current on which the cursor is placed.
- RMS value, maximum half-period, of the
current (for the whole start).
- Starting time of the motor start.
• Screen grabs.
• Recording campaign ("data logging") (960kB of
memory with timestamping and programming of
the beginning and end of a recording
campaign). Representation, in the form of bar
charts or curves, of the mean values of many
parameters versus time.
• Alarms. Listing of recorded alarms (log of up to
4096 alarms) (64kB) versus the thresholds
programmed in the configuration menu.
Programming of the beginning and end of an
alarm surveillance campaign.
3.11.3 Configuration functions
• Configuration of the date and time.
• Configuration of the brightness and contrast of
the screen.
• Configuration of the colours of curves.
• Configuration of the power and reactive energy
calculation (with or without harmonics)
• Choice of language.
• Choice of connection (standard single-phase or
balanced three-phase).
• Configuration of recordings and of alarms.
• Erasure of all data.
3.12 Abbreviations
The display unit of the C.A. 8320 uses abbreviations
of electrical symbols. These symbols, also used in
this manual, are the following:
Unit Designation
AC and DC components.
AC component only.
= DC component only.
φ
Phase shift of phase-to-earth voltage with
respect to phase-to-earth current.
Acf Peak factor of the current.
Ahx Level of order 'x' harmonic in current.
Akf K factor (for transformers).
Arms True RMS current.
Athd Total harmonic distortion of the current.
CF See Vcf and Acf.
DC DC component of the current and of the
voltage (phase-to-phase in balanced 3 φ
mode).
DF Distortion factor (of the voltage or of the
current).
DPF
Displacement factor (cosine of φ).
Hz Frequency of the network studied.
KF See Akf.
PF Power factor (ratio of active power to
apparent power).
PST See VPST.
RMS See Arms and Vrms.
Tan
Tangente of angle φ.
THD See Athd and Vthd.
VA
Apparent power (total if 3 φ).
VAh Apparent energy (consumed or generated;
total if 3 φ).
VAR
Reactive power (total if 3 φ).
VARh Reactive energy (consumed or generated;
total if 3 φ).
Vcf Peak factor of the voltage (phase-to-phase if
3 φ).
Vhx Level of order 'x' harmonic in voltage (phase-
to-phase 3 φ).
VPST Short-term flicker.
Vrms
True RMS voltage (phase-to-phase 3 φ).
Vthd Total harmonic distortion of the voltage
(phase-to-phase 3 φ).
W
Active power (total 3 φ).
Wh Active energy (consumed or generated; total
3 φ).
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