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One-line Drawing

One-line diagram is a simplified drawing used to represent the electrical system, its main components, sources of power, electrical drives, electrical equipment loads, redundant equipment, and spares. One-line diagram is essential for the proper design of equipment in order to ensure safety, reliability, and high performance of the electrical system, and safety of facilities and their personnel as result.

One-line diagrams have a lot of benefits. They are used to document signal flows and chains of various complexity, and the distribution of incoming power to various equipment. One-line diagrams are indispensable for future testing, coordination of service, and maintenance of the electrical system. They simplify troubleshooting, identification of fault levels and locations to ensure correct power flow downstream till the last step in the chain.

One-line diagram is essential for electrical system analysis and as a plan when updating or responding to an emergency. It shows an electrical distribution system layout in a facility and is the base for a critical response plan. One-line diagram is also a valuable tool to clear the power system and layout of electrical distribution in a facility. It shows a power distribution path from the incoming power source to each load.

One-line diagrams are a necessity for the realization of efficient service and maintenance including coordination studies, load flow and safety evaluation, short circuit calculations, and other engineering studies. The visualization of the power distribution system helps to improve and simplify planning and troubleshooting, and document redundant power paths. It increases the efficiency of maintenance activities, tracking of the key electrical characteristics, capacity, load and interconnections of all facility nodes. It simplifies the identification of fault locations, reduces potential outages, and ensures redundancy.

One-line diagram depicts accurately the electrical components and reflects electrical relationships, and how the system will function. Standardized graphic symbols and lines are used to show components of the power systems like generators, transformers, antennas, circuit breakers, switches, fuses, protective devices, conductors, and more. They ensure the ease of One-line drawing design, readability, and ease of its use. A few current-carrying conductors are shown schematically by one line. The sizes and ratings of the components are also shown in the diagram.

One-line Drawing - Low Power Electricity Meter

Example 1. One-line Drawing - Low Power Electricity Meter

Creating and maintaining One-line diagrams is commonly a time and effort-consuming process. However, ConceptDraw DIAGRAM software extended with the One-line Diagrams solution simplifies this process. It offers professional drawing tools for designing One-line diagrams of any complexity according to codes and regulations. One-line Diagrams solution is indispensable for designers, engineers, electricians, installers, and other technicians, which require an up-to-date diagram available at any time.

One-line Diagrams solution includes a set of professionally designed samples and 4 libraries with a large collection of vector design elements:

One-line Diagrams Solution Libraries Design Elements

Example 2. One-line Diagrams Solution Libraries Design Elements

In addition, don't miss to update your One-line diagram each time you make changes in your system, no matter the size of changes and frequency. The relevance of One-line diagrams is really important. It concerns the installation of new equipment, change of source, protection devices, or other utilities, change of system impedance, configuration, loading, etc.

One-line Drawing in ConceptDraw DIAGRAM

Example 3. One-line Drawing in ConceptDraw DIAGRAM

The One-line Drawing samples you see on this page were created in ConceptDraw DIAGRAM software using the drawing tools of the One-line Diagrams Solution. These examples successfully demonstrate the solution's capabilities and the professional results you can achieve using it. An experienced user spent 5-15 minutes creating each of these samples.

Use the drawing tools of the One-line Diagrams solution to design your own One-line drawings, diagrams and schematics quick, easy, and effective.

All source documents are vector graphic documents. They are available for reviewing, modifying, or converting to a variety of formats (PDF file, MS PowerPoint, MS Visio, and many other graphic formats) from the ConceptDraw STORE. The One-line Diagrams Solution is available for ConceptDraw DIAGRAM users.