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In power engineering, a one-line diagram or single-line diagram is a simplified schematic notation for representing a three-phase power system. Network objects such as circuit breakers, transformers, capacitors, bus bars, and conductors are shown by standardized symbols. Instead of representing each of three phases with a separate line and terminal, only one conductor is represented. It is a block diagram which graphically depicting the paths the power flows flow between objects within the system. Objects on the diagram do not represent the physical size or location of the electrical equipment. It is common to organize the diagram in such a way that the left-to-right and top-to-bottom sequence of components represents the logical sequence of the actual switchgear and other devices.
The network objects are represented using predefined symbols. The colour and style of these symbols can be defined for each of the individual objects on the tab Presentation. The default values can be defined in the options menu: Bestand | Options, Editor, Presentation defaults. See: Options
Functionalities are:
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