Where power is produced from sources like hydro, wind, or nuclear. Transformers:
Systems are typically classified by their voltage: Short Lines: Under 80 km; voltages below 69 kV. electrical power transmission system pdf
| Voltage Class | Range | Typical Use | |---------------|-------|--------------| | Sub-transmission | 33 kV – 138 kV | Rural, industrial feeds | | High Voltage (HV) | 110 kV – 230 kV | Regional transmission | | Extra High Voltage (EHV) | 345 kV – 765 kV | Long-distance bulk power | | Ultra High Voltage (UHV) | ≥ 800 kV AC / ≥ 800 kV DC | Very long corridors | Where power is produced from sources like hydro,