Line Flow Arrows on Onelines

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There is a separate object, called a Line Flow Arrow, that can be added to a transmission line or transformer. This object is different than the animated flow arrows that can be added to all transmission branches through settings with the Oneline Display Options. The Line Flow Arrow is a single static arrow that indicates the direction of MW flow on a transmission branch. The direction that the arrow points indicates the direction of MW flow, and there are additional options that allow the MW, Mvar, and MVA flow values to be displayed with the object.

To add a Line Flow Arrow to a transmission branch, select Indication > Line Flow Arrow from the Individual Insert ribbon group on the Draw ribbon tab while in Edit mode, then left-click on the branch to which the Line Flow Arrow should be added. The Line/Transformer Flow Object dialog will open.

The dialog contains the following options:

FromBus, ToBus, Circuit

The from bus, to bus, and circuit of the branch the arrow represents. The from bus indicates the side of the branch at which the flow will be reported. The Find button can be used to open a dialog that allows the selection of a branch.

Size

Size of the object.

Angle

Angle indicating how the object will be drawn. Enter this in degrees.

Anchored

Check this box to anchor the flow arrow to the branch that it represents. If anchored, the flow arrow will move accordingly any time that the branch is moved.

Auto-determine angle when anchored

Check this box to have the angle of the flow arrow determined by the branch to which it is anchored rather than using the user-specified value. The angle is determined by how the branch is drawn and the direction of MW flow on the branch. It is a good idea to use this option by default. This will ensure that the arrow is drawn correctly with the direction of flow.

Show MW, Show Mvar, Show MVA, Show Units

Check the appropriate box to show the selected flow value in text along with the flow arrow object. Check the Show Units box to include units along with the value.

Flow Text Position

Select to place any flow text either Above Arrow or Below Arrow.

Total Digits in Field, Digits to Right of Decimal

Use these fields to indicate the total digits and digits to the right of the decimal for any values that are shown in the flow text.

By default, line flow arrows will be drawn with a lime color. The color and other attributes can be changed while in edit mode. To change how the line flow arrow is drawn, select the object to change and then select Format from the Formatting ribbon group on the Draw ribbon tab. This will open the Format Multiple Objects dialog and any attributes that can be modified will be enabled on this dialog.