janitza UMG 512-Pro, Руководство пользователя и технические данные

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58
Voltage transformers
You can assign voltage transformer ratios to the
main measurement and the auxiliary measure-
ment respectively.
For measurements without a voltage transformer,
select the 400/400 V setting.
Setting range:
Primary
1 .. 1000000
Secondary 1 .. 999
Factory default setting:
Primary
400
Secondary 400
Nominal voltage
The nominal voltage corresponds to the "Agreed
input voltage Udin" according to EN 61000-4-30.
The nominal voltage defines the reference point
for:
·Overdeviation (EN 61000-4-30)
·Underdeviation (EN 61000-4-30)
·Transients
·Events
·Automatic scaling of graphics.
·When the nominal voltage U
LN
is entered, the
nominal voltage U
LL
is calculated automatically.
Formula: U
LL
= U
LN
· √
3
·When the nominal voltage U
LL
is entered, the
nominal voltage U
LN
is calculated automatically.
Formula: U
LN
=
U
LL
√
3
Setting range, U
LN
: 0 .. 999999 V
Setting range, U
LL
: 0 .. 999999 V
Factory default setting: 230 V (U
LN
),
398 V (U
LL
)
Apply AUX / MAIN
These settings can be set separately for the main
and auxiliary measurement.
The menu item "Apply AUX / Main" allows you to
apply the settings from the auxiliary or main mea-
surement respectively, so that you do not have to
enter everything again.
· No - The settings from the auxiliary or main mea-
surement are not adopted.
· Yes - The settings from the auxiliary or main
measurement are adopted.
Connection
For voltage and current measurement, you can
choose between different connection schemes
using the "Connection" selection (see „7.7 Con-
nection variants“).
Factory default setting: 4w3m
Fig. Transformer, main measurement
Fig. Example of measurement in a three-
phase 4-conductor network with an asym-
metrical load