Reference an existing circuit

When a new circuit is inserted, you can reference an existing circuit picked from a list of circuits pulled from the active project. The components, values, descriptions, and tag assignments from the selected circuit, become defaults for the new circuit. Tags are recalculated if the option “Retag new components” is selected.

In this exercise, you insert a 3-phase motor control circuit referencing the one-line motor control circuit inserted earlier.

1. Start a new blank drawing and save it as Three-Line.dwg.
2. In Project Manager, right-click on the project name and select Add Active Drawing.
3. Click Yes to apply the project default values to the drawing settings.
4. Click Schematic tabInsert Wires/Wire Numbers panelInsert Ladder drop-downInsert Ladder.
5. Insert a 3-phase ladder.
6. Click Schematic tabInsert Components panelCircuit Builder drop-downCircuit Builder.
7. The Circuit Selection dialog box displays.
8. Select 3ph Motor Circuit: Horizontal - FVNR - non reversing.
9. Select Reference Existing Circuit.
10. Select the List button.

    The Existing Circuits dialog box displays.

11. Select the one-line motor control circuit inserted on One-Line.dwg, MOT1.
12. Click OK.

    The CODE and UI_VAL values from the circuit codes sheet of the circuit builder spreadsheet control the default circuit element options. For example, the one-line circuit used the Disconnect switch and fuses option with a UI_VAL of “4”. When the 3-phase circuit references this one-line circuit, the disconnecting means option with a UI_VAL of “4” becomes the default. If a matching UI_VAL is not found for a particular marker block CODE value, the default as defined by the “X” in the UI_DEF column is used.

    When the new circuit is built, component values from the referenced circuit are applied to components in the new circuit only if the marker block code matches.

13. Turn off the Retag new components check box.
    

    It directs Circuit Builder to use the tags from the one-line circuit for the components with matching marker block code values.

14. Select Configure.
15. Select an insertion point on the bus for the new circuit.
16. Verify that the same circuit elements as the referenced one-line motor circuit are selected. The default options are based on the referenced circuit.

    Circuit Elements	Select
    Motor symbol	Motor: 3ph motor Ground/PE wire connection: No
    Disconnecting means	Main Disconnect: Disconnect switch and Fuses Include N.O. Auxiliary contact: No
    Control transformer and circuit - non-reversing	Include control circuit: None
    Power Factor correction	Include power factor correction capacitor: None
    Overloads	Overload elements: None Include N.O. auxiliary contact: No
    Motor terminal connections	Motor connection terminals: None
    Cable marker	Cable: Yes
    Safety disconnect at the load	Safety disconnect: None Include N.O. auxiliary contact: No

17. Click to insert all circuit elements.
18. Click Done.

The circuit is inserted and the component values from the one-line circuit are applied. The motor symbol receives the same catalog value and horsepower rating. The main disconnect switch receives the same rating values for the switch and the fuses. The motor symbol receives the values modified on the one-line circuit after it was inserted.

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