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Power systems are extremely complicated electrical networks that are geographically spread over very large areas. For most part, they are also three phase networks; each power circuit consists of three conductors and all devices such as generators, transformers, breakers, disconnects etc. are installed in all three phases. In fact, the power systems are so complex that a complete conventional diagram showing all the connections is impractical. Yet, it is desirable, that there is some concise way of communicating the basic arrangement of power system components. This is done by using Single Line Diagrams (SLD) or One Line Diagrams.
one-line diagram is the most important drawing a plant
can have for understanding its electrical system and
shows a correct power distribution path from the incoming
power source to each downstream load, including the
ratings and sizes of each piece of electrical equipment,
their circuit conductors, and their protective devices.
The OpenNIS Schematics
application is a CAD-based software in the OpenNIS
suite which can generate, modify and maintain IEC standards-compliant
High voltage and Low voltage distribution schematic
SLDs of Utility networks.
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All components of the selected grid/workspace are displayed
symbolically in a hierarchical tree to the left, and
in SLDs to the right. New components to the grid can
be added, and existing components can be edited/removed
easily. In order to comply with the government regulations,
complete and up to date electrical single line diagrams
and equipment operating and control schematics must
be made available in the utility work place. These important
documents are required to be updated as necessary or
as equipment changes or is modified and sometimes verified
on an annual basis, which can be done easily through
the user-friendly GUI in OpenNIS Schematics.
The OpenNIS Schematics can
effectively and efficiently display both HV
schematic diagrams and LV schematic diagrams.