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Is the power loss during the stepping up / down of voltages, in transformers, comparable to that of raw current running through cross-country wires?

How much energy is saved?

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  • $\begingroup$ Woah woah woah. A transformer doesn't cause power loss unless there's already loss in the wires. $\endgroup$
    – DanielSank
    Dec 24, 2016 at 22:59
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    $\begingroup$ Modern transformers are very, very efficient. I think like around 99% efficiency? Pretty sure that power losses from transmission lines are much greater than losses from transformers in modern electric power transmission systems. $\endgroup$
    – user93237
    Dec 24, 2016 at 23:03
  • $\begingroup$ post sam's response as an answer, not a comment? $\endgroup$
    – JMLCarter
    Dec 24, 2016 at 23:32

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Modern transformers are very, very efficient. I think like around 99% efficiency? Pretty sure that power losses from transmission lines are much greater than losses from transformers in modern electric power transmission systems.

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  • $\begingroup$ Doesn't it depend on the ratio as well? How efficient is converting 5V to 24V or vice versa? I have heard that buck converting (decreased output voltage) is more efficient than boost converting (increased output voltage). $\endgroup$
    – neverMind9
    Oct 29, 2018 at 10:28

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