Electrical

The Power Grid: Generation to Outlet

Electrical Diagrams · made in Skemio

Power grid workflow showing power plant, step-up transformer, high voltage transmission lines, distribution substation, pole transformer, and outlet.
Power grid workflow showing power plant, step-up transformer, high voltage transmission lines, distribution substation, pole transformer, and outlet.
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What it shows

  • Stepping up to 500kV drops transmission current and cuts I2R heat loss.
  • Substations step power down in stages for regional and feeder branches.
  • Pole transformers split 7.2kV single-phase into 120V/240V split-phase.

The takeaway

High voltage minimizes resistive heat losses across vast transmission spans.

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