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7.5.3. 4A SIMULTANEOUS DISPLAY SCREEN
This screen displays the RMS, DC (only if at least one of the current sensors can measure direct current), THD, CF, FHL and FK
values of the phase and neutral currents.
Column of RMS values and (if the current sensor allows)
DC values along with the CF and the THD (%r) concerning
Columns of current values (phases 1, 2 and 3).
RMS: true RMS value calculated over 1 second.
THD: total harmonic distortion with the fundamental RMS
value as reference (%f) or with the total RMS value
CF: peak factor calculated over 1 second.
FHL: harmonic loss factor. For the oversizing of
transformers to allow for harmonics.
FK: K factor. Derating of the transformer as a function of the
NOTE: To make it possible to adjust the zero of current sensors measuring DC, the DC values are never cancelled.
7.5.4. L1 SIMULTANEOUS DISPLAY SCREEN
This screen displays the RMS, DC, THD, and CF values of the phase-to-neutral voltage and of the current, PST and PLT of the phase-
to-neutral voltage, and FHL and FK of the current for phase 1.
Column of voltage values simple.
RMS: true RMS value calculated
over 1 second.
DC: DC component.
THD: total harmonic distortion
with the fundamental RMS value
as reference (%f) or with the total
RMS value without DC as
reference (%r).
CF: peak factor calculated over 1
PST: short-term flicker calculated
over 10 minutes.
PLT: long-term flicker calculated
over 2 hours.
NOTE: The DC value of the current of phase 1 is displayed only if the associated current sensor can measure direct
current. L2 and L3 provide the simultaneous display of the current and voltage for phases 2 and 3, respectively.
7.5.5. SCREEN FOR SIMULTANEOUS DISPLAY OF NEUTRAL
This screen displays the RMS, THD and CF voltage and current of the neutral, the DC component of the neutral voltage, and (if
the current sensor allows) the DC component of the neutral current.
the neutral.
DC: DC component.
without DC as reference (%r).
harmonics.
second.
Figure 7-19
Figure 7-20
61
Current column.
RMS, DC (if the current sensor al-
lows), THD and CF values.
FHL: harmonic loss factor. For the
oversizing of transformers to allow for
harmonics.
FK: K factor. Derating of the
transformer as a function of the
harmonics.
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