“Harmonic Restraint View” Window
As mentioned before, one of the main windows of diff Harmonics room is “Harmonic Restraint View”. This window shows the relay harmonic characteristic curve based on the settings entered in “Test Object” window. The top of the characteristic curve is called “Tripping” area while the bottom is called “No trip” area. This means that if the test point is located at the top of the curve, the relay gives a trip otherwise it does not. This window has some shared and some unique features. The feature available by right or left clicking on this window are common to all rooms and it is not necessary to explain them here but at the bottom of this window there is a gear by clicking on which some other useful options are displayed. By clicking on “Zoom during test”, if one or multiple “Shot” or “Search” lines are drawn on the characteristic curve, by running the test you can see that the software zooms on the areas where the test points are located and shows the found zone line.
If you select “Optimize All(Change Fault Type)” option, by changing the “Fault type”, the characteristic curve display is “Optimized”. By using “Pan Mode(alt+mouse+click)” you can move the characteristic curve diagram as desired. By using “Show row number” you can view the row number of any test point or test line on the characteristic curve. By selecting “Show zones(All Search Lines)”, test zones of all “Search” are marked with a circle to find the characteristic curve line. By selecting “Show zones(Selected Search Line)”, only the points of the line selected from “Search line” table are marked with a circle.
By clicking on “Show all t act point”, the operation time of the tested points is showed. If the points are close to each other and it is not possible to view the times clearly, you can use “Show selected t act point” option which shows the time of the row selected from the test points table. “Show all Id & Ih Act” and “Show selected Id & Ih Act point” options are used to show all tested “Search Test” and the points related to the row selected from the “Search Test” table respectively. By selecting “Snap to grid” option, the points on the characteristic curve that are shot close to the grids snap to the grids of this page. By selecting “Snap to Line” option, the points on the characteristic curve that are “Shot” close to the characteristic curve grid snap to it.
