Single line diagram is an one line representation of a three phase Electrical network. The benefit of this type drawing is that the whole of the Electrical system can be viewed in one or few drawing sheets, which allow senior engineers to make decisions regarding application and suitability of the system. This drawing also allows checking of expandability, future extensions, augmentation of the system. The most important feature of a Single line drawing is that rating and capability of all major equipment are visible in one drawing, which allows ease of design, operation and maintenance. Satcon prepares single line diagrams for electrical systems from 400kV voltage level to 240V small power level. Our senior engineers have long experience of successfully preparing SLDs of many type of projects.