


Definition of relay characteristics

The nominal relay characteristics and settings can quickly and easily be defined by a graphical characteristic editor. Starting, trip, extended, and no-trip zones are defined by using pre-defined elements. A complete overview of all defined zones is provided. The standard XRIO interface makes it possible to directly import the relay data from the relay’s parameter setting software (if supported by the relay manufacturer). The impedance settings for the zones can be entered and displayed in primary or secondary values.


Definition of tests


When a test is performed, the test point lists of the individual fault loops are processed sequentially. The reaction of the relay is compared to the specified nominal settings and an automatic assessment is made (“passed“ or “failed“). The results are displayed graphically in the impedance plane, as well as numerically in the test point table. For a more in-depth analysis of the results, the voltages and currents related to a test point and the relay’s reaction can be graphically displayed. Time measurements between different points can be made using cursors.


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