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VEGA78
EN - 45
Press
F4
key (alternatively touch
MODIFY
at display) for setting the below voltage
anomalies parameters:
Reference nominal voltage
Vref
depending on the type of considered system. In
particular
Vref = VP-N
(Single phase and three phase 4-wire systems),
Vref = VP-P
(three phase 3-wire and ARON systems)
The higher threshold percentage of reference nominal voltage, selectable from
1%
to
30%
for voltage swell detection.
The lower threshold percentage of reference nominal voltage, selectable from
1%
to
30%
for voltage sags or breaks detection.
Fig. 74: Voltage Anomalies screen - setting control parameters
1. Move the cursor using arrows keys on field relative to “
Voltage Anom.
” , marked it with
blue background.
2. Use up or down arrow keys or press
F3
or
F4
keys (alternatively touch the
MOD(+)
or
MOD(-)
s at display) to setting the correspondent value. Pressing and holding of these
keys permits a rapid values setting, while the single pressure increase or decrease on
only unit the value. Use left or right arrow keys to move on various fields.
3. Press
SAVE
or
ENTER
keys (or the smart icon
) to save each performed setting.
CAUTION
The nominal reference value should be set depending on the type of
considered system on test and the measured voltage. A message “
Wrong
Vref voltage anomalies
” at the recording start is shown by meter which do
not permits the recording operation due to this wrong configuration (e.g.: 4-
wire system and Vref = 400V). Set the correct value in this case.
5.4.8. Unbalance
The selection of this option include on selected parameters list for recording the value of
NEG%
and
ZERO%
s which are index of unbalance of input voltage signal respective to
negative tern and zero term (see § 10.3). “Unbalance” is not shown for single phase
systems.
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