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The studies and drawings shall be readily available and maintained on a consistent basis.Ī main program shall include the continual upkeep and review of the following power system studies and drawings: Power system studies and one-line drawings are critical to the safe and reliable operation of electrical power systems. “Power system studies and single line diagram Having an up-to-date SLD is required to complete a power system study. Having an up-to-date SLD can help avoid longer downtimes and keep everyone safe.
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Check applicable up-to-date drawings, diagrams, and identification tags.” “Process for establishing and verifying an electrically safe work conditionĪ) Determine all possible sources of electrical supply to the specific equipment. Use up-to-date diagrams in establishing an electrically safe work condition. Suitable documentation, including up-to-date drawings and diagrams, shall be consulted to ensure that no electrical circuit interlock operation can result in re-energizing the circuit being worked on.” SLDs help verify electrical circuit interlocks will not result in the re-energization of the circuit being worked on. To plan your lockout/tagout procedures, you need up-to-date primary sources of information.Ī lockout procedure shall be developed on the basis of the existing electrical equipment and system and shall use suitable documentation, including up-to-date drawings and diagrams.” WHY DO I NEED A SINGLE-LINE DIAGRAM?įor everyday operations and maintenance, as well as engineering power system studies.īoth require that the diagram be kept up-to-date and available.
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It will also discuss the importance and needed to regularly update or update electrical installation drawing documents for the purposes of reliability, operation and electrical safety.
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In this article, we will briefly discuss what an electrical SLD is, types of electrical diagrams, the importance and benefits of a single line diagram. Sometimes a a single line drawing or diagram of an electrical installation is also called a one-line diagram. The definition of a single-line diagram or SLD is an electrical diagram or drawing that represents the components of an electrical installation system represented by symbols, and describes how the components are related.