How to read single one line diagram | Electric Arc Lets go through a industrial single line diagram. When interpreting a single line diagram, you should always start at the top where the highest voltage is and work your way down to the lowest voltage. This helps to keep the voltages and their paths straight. To explain this easier, we have divided the single line into three sections. Learn To Interpret Single Line Diagram (SLD) | EEP Single line diagram (SLD) We usually depict the electrical distribution system by a graphic representation called a single line diagram (SLD). A single line can show all or part of a system. It is very versatile and comprehensive because it can depict very simple DC circuits, or a very complicated three-phase system. HOW TO READ ELECTRICAL ONE LINE DIAGRAM: (WITH EXAMPLES) SINGLE LINE DIAGRAM: As a layman View, SLD is nothing but consisting of various components of the Electrical System like, Transformer, DG, How to read an electrical diagram Lesson #1 - YouTube We begin with a basics fuel pump & relay diagram. This feature is not available right now. Please try again later.