The Distance Relays Window (“DS Relays Window” hereafter) displays the characteristics of distance relays. You can open this window with the Relay | View Relay Curves and Logic Scheme command from the Main Window and with the “Show Curve” button in the relay-group dialog box. Up to three distance-relay characteristics can be displayed in this window at one time. The axes are in primary ohms. An optional circular grid can be toggled on and off with the Misc | Grid On/Off command.
You can change the extent of the x and y axes in primary ohms and consequently, the scaling of the distance relay characteristics using the zoom slider on the toolbar. You can also press one of the shortcut keys (1,2,3,4,5,6,7,or 8) to enter corresponding zoom level.
The relay parameters are shown within rectangular description boxes. You can move these boxes with either mouse button. You can open the info dialog box by double-clicking the left mouse button within the description box.
When the characteristics of a second or a third relay are being displayed, you can view the offset and the direction (forward or reverse) of this relay by double clicking the left mouse button on the small crosshair at its origin. You can change the offset of the relay with respect to the origin of the graph by dragging the crosshair with the mouse.
The cursor coordinates are shown next to mouse cursor when you drag with either mouse button.
Clicking the right mouse button on the DS Relays Window will bring up a floating menu of commonly-used commands.
You can work on the DS Relays Window and the Main Window at the same time. If you have a large monitor, you can arrange the windows side by side and execute commands in both windows. When you display a fault in one of the windows, the same fault is displayed on the other window. If your monitor is not large enough to see both windows at the same time, you can minimize the DS Relays Window while you view the one-line diagram. To restore the DS Relays Window, simply double-click on the window icon at the bottom of the screen.
You can paste up to 16 pictures onto the DS Relays Window. The pictures are moveable, and the picture background can be opaque or transparent.
You can store the relay characteristics being displayed in the DS Relays Window to a ‘curve collection’ in a PCC file. When you recall the curve collection later with the Relay | Open Curve Collection command in Main Window, or with the Misc | View Curve Collection command in the DS Relays Window, the relay characteristics, relay descriptions, annotations, pictures, load region and the fault description will reappear in the exact same arrangement on the window.
The commands in the DS Relays Window are described in this section.
DS Relays Window