Single-line diagram: 13.8 kV substation
Utility substation one-line diagram — 138 kV grid source, 15 MVA step-down transformer, high- and medium-voltage buses, feeder breakers. IEEE 315 symbols.
Simplified utility substation one-line: 138 kV grid → 15 MVA step-down transformer → 13.8 kV medium-voltage bus → feeder breakers.
Cannot parse line: utility [label: "Grid 138 kV"]