Power Plants

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120/240V Single Phase 3 Wire Explanation And Demonstration

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The split phase system in America is a bit confusing but actually it's kind of ingenious in the sense that no wire has more than a 120 volt potential to ground. But it turns out there is more than meets the eye - the nuetral line actually carries any current not equal between the two phases back to the transformer - and if it's disconnected only the lowest amperage of the two phases will work. Fascinating stuff.

How Do Substations Work?

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Untangling the various equipment you might see in an electrical substation.

This is a very interesting video. Substations do a lot more then just stepping down the voltage from high-voltage transmission lines. They carefully control the output voltage and frequency, bring together often multiple power lines feeding into the system, they can disconnect and connect lines for servicing and repair. In many ways, substations really are the brains of the local power grid.