MENTOR 12 US SECTION 4 CONFIGURATION – Page 100 ER’S MANUAL
which the equipment works (normally 50 or 60 Hz, but it can be any other
value) and the Debounce and Glitch values, which are filters applied to the
binary inputs, to avoid undesired or untimely actions.
• Referring to the language the application works in: The work language
can be selected, with all the advantages this implies.
Definitions and Use
The operator can find all the necessary controls on this screen, grouped into different
sections:
• Value reference: The control of the Voltage and Current magnitude values
can be selected in primary or secondary values. To select one mode or
another, press on the one you wish to use.
• Ratios: In this section you can assign the transformation ratios of the voltage
transformers and of the current transformers in the event that you wish to
control in primary values.
As you can see on the screen, it is possible to enter data to define ratios that
affect groups with three sources (three-phase system), as it is assumed that
the protection transformers are identical for each phase, at one same
measurement point.
IMPORTANT: You must enter the data corresponding to voltage in the following
way:
In the window corresponding to “Primary Rated Voltage” you must
enter the rated value of the transformer primary in Phase Volts to
Neutral (e.g.: 127020 V) and in the window corresponding to
“Secondary Rated Voltage” you must enter the rated value of the
transformer secondary in Phase Voltages to Neutral (e.g.: 63.510
V).
Note: The voltage transformers are usually defined by their primary and
secondary voltages between phases, not from Phase to Neutral.
The values entered in the previous example correspond to a
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