•I- and U-Multipliers - You can modify any CT- / VT-ratio with this parameters. For example, to get better
precision when using overweighted CTs, you can apply more windings of measured wire through the
transformer. Then you must set the multiplier. For example, for 2 windings applied, set the multiplier to 1/2 =
0.5 .
For standard connection with 1 winding, the multiplier must be set to 1.
The CTN and CTRCM ratios have their extra IN – and IRCM–Multipliers. Instead the IRCM–multiplier, the 0/20mA or
the 4/20mA RCT- type can be set – see the full-scale operating manual.
•Nominal Frequency fNOM - the parameter must be set in compliance with the measurement networ
nominal frequency to either 50 or 60 Hz, optionally to „DC-500“ (= Fixscan mode).
• Nominal Voltage UNOM, Nominal Current INOM, Nominal Power PNOM - For the presentation of quantities in
percent of nominal value, alarms operation, voltage events detection and other functions it is necessary to
enter also the nominal ( primary ) voltage UNOM, nominal current INOM and nominal apparent three-phase
power (input power) of the connected load PNOM ( in units of VA ) Although the correct setup has no effect on
measuring operation of the instrument, it is strongly recommended to set at least the UNOM correctly.
The UNOM is displayed in form of phase/line voltage.
Correct setting of the INOM and the PNOM is not critical, it influences percentage representation of powers and
currents and statistical processing of measuring in the software only. If measured networ node rating is not
defined, we recommend to set their values, for example, to the nominal power of source transformer or to the
maximum supposed power estimated according current transformers ratio, etc.
2.1.1. Setup Example
Following example explains how to adjust the CT ratio :
Assuming that the conversion of used CT for inputs of current L1 to L3 is 750/5 A. To edit the parameters, press the
, navigate to the Menu-Settings with the buttons and and then choose it with the .
In the Setting window choose Setting-Installation option. The Setting-Installation window appears.
In the window navigate down to the current transformer ratio parameter ( CT ) and choose with the .
Now you can type new value of the parameter : with the you can move from a digit to another one and to set each
digit to target value using the and . At the end press the and the parameter is set.
You can set other parameters in the same way.
After all of the parameters of the group correctly set, return bac to an actual data screen with the (escape) button
and confirm saving of changes with the .
