Single Line Diagram Control Functions. Lets go through a industrial single line diagram. Electrical elements such as circuit breakers transformers capacitors bus bars and conductors are shown by standardized schematic.
As with loop diagrams and pids for instrument technicians schematic and single line diagrams serve different purposes for professionals analyzing power systems. 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. The top end usually corresponds to the start of the scheme.
The top end usually corresponds to the start of the scheme.
The differences arent necessarily intuitive at first glance. In power engineering a single line diagram also sometimes called one line diagram is a symbolic representation of a three phase electric power system. But each serves different functions. To explain this easier we have divided the single line into three sections.