The central equipment type of every one-line is the bus. A bus defines the connection point for two or more pieces of equipment. Equipment items which are not yet connected to a bus are highlighted in red.
To add a bus to the one-line, click Bus in the Equipment Palette or Insert tab. The pointer changes to the shape of a bus as you move back to the one-line. Click on the location where you want to position the bus. You can continue adding buses in this way until you click on another palette button.
Place buses in the drawing as shown below by clicking the left mouse button and dragging each bus to the one-line.
Tip: You can set a default base kV for new buses by selecting Tools > Equipment > Bus.
Figure 1: Inserting Buses
Note: For this example, we are assuming a three-phase system.