Southern California Edison, 500-kV underground

Engineering a 500-kV Underground System

Southern California Edison realizes project success through collaboration with key organizations.

The 500-kV Tehachapi Renewable Transmission project in Southern California, U.S., will deliver renewable energy from Kern County, south through Los Angeles County and then east to the city of Ontario in San Bernardino County, a distance of more than 170 miles (274 km). The project, which replaced many of Southern California Edison’s (SCE’s) existing 220-kV lines with 500 kV, was all overhead except for 3.7 miles (6 km) of the line p

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