"Single line diagram" is common in utility power, because the electricity itself is 3-phase so drawing individual conductors and components would clutter the di

"Single line diagram" is common in utility power, because the electricity itself is 3-phase so drawing individual conductors and components would clutter the diagram with information not needed at a high level. Many discrete components are omitted as well; the idea is to give the operators an immediately-comprehensible sense of how much power is flowing where, and where the measurement and interruption points are. Little more is needed at that stage.