Ln11 is shown being selected in this sample circuit.
The Feeder Path Trace (aka: Denote Feed Direction) tool enables the user to graphically highlight the current feeder path to a selected component.
This utility, initialized from the View menu or Circuit Tools dialog, begins by launching the selection procedure (i.e. mouse pointer-finger) for user to select the component of interest.
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Ln11 is shown being selected in this sample circuit. |
After selecting component, the Feeder Path Trace Tool dialog opens and applicable feeder path is highlighted in the drawing window.
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The dialog provides user interface with drawing while feeder path utility is running. The top window displays general information for the application. Zoom Display allows user to control zoom level [Up] / [Down] of drawing, while running the utility. The displayed value defines the zoom factor used during operation. User Scroll Options allow user to scroll (or pan) drawing view, while running utility. The Offset Pan Value defines the step size (per drawing unit length) that each (Left/Right/Up/Down) selection pans the drawing view. [Find & Pan to Open Point Along Feeder] - used for paths with lost power, this command button locates open switches in selected component's feeder path (last powered or as-built). Distance to Feeder Length [__] - displays the distance (via feeder path) that selected component's endpoint is from the active source. Also, allows user to specify a target distance for the Pan to Feeder Length command. [Pan to Feeder Length] - pans drawing view to the feeder component for part located with specified Distance to Feeder value. [Pick] - returns user to selection routine, allowing selection of another component for feeder path view. [Cancel] - exits the feeder path trace utility. |
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This illustration shows the feeder path to Ln11 in the original build of sample network, seen to be from circuit C1, via breaker Br11. |
To further demonstrate usefulness of the tool, some of the subtle complexities inherent with feeder path determination are illustrated by the following series of feeder path traces.
For all of the cases, the network switch configuration is the same, i.e. with all switches & breakers closed. However, before running the feeder path trace for each case, different scenarios of switching operations were used. This unique history of preceding events, produces different results for the feeder path of selected component Ln11.
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Here, feeder path to Ln11 is shown after (breaker) Br11 was tripped and reset. While breaker and switches are all in the original state (i.e. closed), the feeder path to Ln11 is now seen to be from circuit C2, via Sw121. |
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After recovery from the tripped breaker, Sw121 was cycled (i.e. opened and closed) and another feeder path to Ln11 became active. Now, the feeder path to Ln11 is seen from C2, via sw122. |
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Opening Sw122 and Sw121, then closing both back, the feeder path is again seen to change, still through circuit C2, but this time via Sw123.
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Note: After Br11 was reset, having all three switches in open state before closing each of them back returns to the as-built feeder path for Ln11 via circuit C1.
