Sort by: Hits | Alphabetical | HowStuffWorks "How Power Grids Work" The three-phase power leaves the generator and enters a transmission substation at the power plant. This substation uses large transformers to convert the ... | http://science.howstuffworks.com/power4.htm |
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 | Electric Power eTool: Illustrated Glossary: <em>Substations A step-up transmission substation receives electric power from a nearby ... Step -down transmission substations are located at switching points in an ... | http://www.osha.gov/SLTC/etools/electric_power/illustrated_glossary/substation.html |
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