Chapter 4 – Configuration
4 VOLTAGE CIRCUIT
Considering the input type configurations, it is possible to create voltage circuits with 1, 2, 3, or 4 elements.
For details about each circuit type, see Chapter 14.
The circuit sequences supported by the equipment are ABC, BCA, CAB, CBA, BAC, and CBA and may be
customized by the user in the equipment setup. The default sequence is ABC.
To add a new voltage circuit select the VOLTAGE CIRCUITS section and fill in the following:
The IDENTIFIER text field allows user to enter a single code for the circuit being defined (maximum 12
characters). No editing allowed;
The WIRING scroll box allows user to select a number of elements used for measuring (1, 2, 3, or 4). No
editing allowed;
Selecting the 3-PHASE CIRCUIT SYNTHESIS check box, the 3-phase circuit synthesis is enabled. It is only
possible to select 3-phase circuit synthesis in a 1 element circuit (phase A, B, or C);
The INPUTS scroll box allows user to select the inputs to which each measuring element is connected. No
editing allowed;
The NOMINAL VALUE text field allows user to enter a circuit rated voltage;
The RATIO text fields allows user to enter ratio of power transformers for each input.
Once the circuit is created, it appears in the configuration interface menu. When selecting the circuit, a
screen shows the characteristics of the circuit selected, as shown in Figure 22. It is possible to edit some
parameters, such as nominal value and transformation ratio.
The frequency is calculated individually for each circuit as long as the magnitude of the voltage is over 10%
of the nominal magnitude configured in the Voltage Circuit window. The frequency track occurs within the
range of Nominal Frequency ±5Hz.
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