I've read about how the transformer that steps the high voltage power from the utility power lines down to the meager 240 volts that a house uses and I've seen the diagram, and from what i can see, it looks like there is an unregualted coil that high-voltage electricity constantly flows through. If I stop drawing from the smaller, low voltage output coil, how would that effect how much power continues to travel through the first coil? Is there regulatory circuitry in the transformer to regulate this coil's current, or does it just keep flowing? It would seem like it must be regualted, because the utility system can be overloaded, resulting in a blackout, so the draw must not be constant. So how does it work?
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