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A step-up transformer increases (or "steps up") the voltage of an alternating electrical current. For example, a step-up transformer could be used to increase 120V AC to 277V AC to provide power to 277V electrical equipment in a building that does not already have a 277V electrical system.

Other examples where a step-up transformer might be used include these:

  • Using 240V AC equipment with a 120V AC mains supply.
  • Generating high voltage for use with tubes, such as a CRT.
  • Generating high voltage for use in electric energy distribution.
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13y ago

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