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This schematic represents a simplistic layout of power production and distribution in the US. Production begins at a three-phase generator (top left). The lower half of the schematic is showing the consumers.
I attempted to give a visual representation of transmission lines, poles, substations, and transformers. The top two conductors are grounded shield wires for lightning protection. The transmission lines at the top are the highest voltage, long distance conductors. At the top right, there is a substation. The bottom left pole has a three-phase transformer for commercial consumers. The bottom right pole has a split single-phase transformer for residential consumers.
The oscilloscope pattern is showing the three-phase voltage on the distribution wires. I provided voltmeters at the commercial consumer to measure phase to phase, and phase to neutral/ground. There are also three voltmeters at the residential consumer to show line to line, and line to neutral/ground voltages.
I added a buck/boost transformer and wired it to boost the phase to phase voltage from 208 to 236 to run 240 volt loads at the commercial consumer. I provided the voltmeter to measure that.
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