Basic DC Theory DC CIRCUIT TERMINOLOGYFigure 9 Schematic DiagramOne-LineDiagramThe one-line, or single-line, diagram shows the components of a circuit by means of single linesand the appropriate graphic symbols. One-line diagrams show two or more conductors that areconnected between components in the actual circuit. The one-line diagram shows all pertinentinformation about the sequence of the circuit, but does not give as much detail as a schematicdiagram. Normally, the one-line diagram is used to show highly complex systems withoutshowing the actual physical connections between components and individual conductors.As an example, Figure 10 shows a typical one-line diagram of an electrical substation.Rev. 0 Page 13 ES-02
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