The following section describes the creation of a simple single-line schematic page. First, a single-line schematic page is added to the project. Two symbols (a motor overload switch and a three-phase motor) are then placed on this page and connected to each other using autoconnecting. A connection definition point is used to designate the resulting connection.

Preconditions:

• You have opened a project.
• You have access to a single-line symbol library.

Create a page for single-line representation

1. Select Page > New.
2. In the New page dialog, select the entry "Schematic single-line (I)" from the Page type drop-down list and click [OK].
   
   EPLAN creates a page of page type Schematic single-line and opens it in the graphical editor.

Insert symbols

1. Select Insert > Symbol.
2. Select the "IEC symbols, single-line" entry in the Filter drop-down list in the Symbol selection dialog.
   
   Only single-line symbols are now available for selection.
3. Select the List tab.
4. Enter the characters "ql3" into the Direct entry field.
5. Click in the symbol selection list on the Name column heading so that the symbol names are displayed in ascending order.
6. Select the symbol QL3 with the symbol number 124. This is a single-line motor overload switch with 6 connection points. A preview of all available variants of the selected symbol is shown at the right-hand side.
7. Select the first symbol variant at the upper left of the preview and click [OK].
8. Place the symbol on the single-line schematic page in the graphical editor and leave the specified device tag Q1 as well as the connection point designation in the Properties <...> dialog as they are.
9. Use the Symbol selection dialog to insert another symbol into the schematic, this time the symbol M3 with the symbol number 62.
10. Place variant A of the three-phase motor with PE / PEN connection in the schematic, directly below the motor overload switch Q1 so that an autoconnect line connects both components.
11. Leave the suggested device tag M1 and the connection point designation of the motor as they are.
    
    The following schematic is displayed:
    
    

Place the connection definition point

To represent the connection with three conductors, a connection definition point is placed on the autoconnect line.

1. Select Insert > Connection definition point.
2. Place the connection definition point on the autoconnect line between the two symbols in the schematic.
3. In the Properties <...> dialog open the Symbol / function data tab, select the "Single-line" entry from the Representation type field, and click Apply.
4. Change back to the Connection definition point tab.
   
   The Properties list displays the Number of functions property. If this is not the case, add this property to the list via the (New) button.
5. Also bind this property to the Display list so that the entered value is displayed at the connection definition point in the schematic.
6. Change back to the Connection definition point tab and enter the value "3+PE" into the Number of functions field.
7. Accept the entries in the Properties <...> dialog by clicking [OK].
   
   The following schematic is displayed:
   
   

See also

Single-line representation: Principle