See Also
Three winding transformer display objects do not currently have as much functionality as other display objects. They do provide a graphical representation for identifying where three winding transformers are located in the network, but the display objects do not provide access to additional control information for the transformer. Three winding transformer display objects cannot be anchored to buses like other objects can, meaning that they will not move as other objects in the display are moved around.
A three winding transformer can be added to a oneline display while in Edit mode by selecting Network > Three-Winding Transformer from the Individual Insert ribbon group on the Draw ribbon tab. This will change the mouse cursor to a cross-hair. Place the cross-hair on the oneline background at the location where the new transformer should be placed and then left-click. This will open the Three-Winding Transformer dialog.
The Three-Winding Transformer dialog contains information about the display of the three winding transformer only. Use the Three Winding Transformer Display to view and change control parameters and other information about the transformer. The dialog contains the following parameters:
Primary Number, Name, and Area
Number, name, and area number of the primary winding bus.
Secondary Number, Name, and Area
Number, name, and area number of the secondary winding bus.
Tertiary Number, Name, and Area
Number, name, and area number of the tertiary winding bus.
Circuit
Circuit ID of the three winding transformer.
When creating a new three winding transformer on the display, the primary, secondary, and tertiary bus numbers and circuit ID must be provided that correspond to a three winding transformer that already exists in the power flow case data model. The creation of a new three winding transformer in the data model is not allowed by graphically inserting a transformer. The bus names and area numbers are provided for informational purposes only and do not have to be entered when creating a new display object.
Click the Find button next to the winding specifications to open a dialog that can be used to search for an existing three winding transformer in the data model.
An existing three winding transformer display object can be assigned to a new three winding transformer data object by changing the Primary, Secondary, Tertiary, and Circuit to match an existing three winding transformer data object.
Labels
Optionally, create a label to identify the three winding transformer that the display object represents. Assigning a label here will associate a label with three winding transformer in the data model. See the Labels topic for more information about labels.
This entry is an exception for this dialog. All other fields are associated with the display object only. This is the only field that is associated with the underlying data object that the display object represents.
Display Size
This is the vertical size of the object when displayed using Orientation Up or Down. This is the horizontal size of the object when displayed using Orientation Left or Right. This is in Simulator units.
Display Width
This is the vertical size of the object when displayed using Orientation Left or Right. This is the horizontal size of the object when displayed using Orientation Up or Down. This is in Simulator units.
Pixel Thickness
Thickness in pixels of the lines used to draw the object.
Anchored
This option is permanently disabled. Currently, three winding transformer objects cannot be anchored to other objects.
Orientation
Options are Right, Left, Up, and Down. The option selected determines the side of the object that the secondary and tertiary windings are on relative to the primary winding.
Tertiary Orientation
This option determines the placing of the tertiary winding relative to the secondary winding. If the Orientation is either Right or Left, the Tertiary Orientation options are either Up or Down. If the Orientation is either Up or Down, the Tertiary Orientation options are either Right or Left.
Colors
Different colors can be specified for the Primary, Secondary, and Tertiary windings. Either left-click on the color or click the Change button next to the appropriate winding to open a dialog that will allow color selection.
OK, Cancel, Help
Click OK to apply any changes and close the dialog. Click Cancel to close the dialog without applying any changes. Click Help to open this help topic.