 ##  [On-Load Tap Changer](/index.php/load-tap-changer) 

  ##  [On-Load Tap Changer](https://engineering.quantumdictionary.io/load-tap-changer-0) 

  
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**Engineering &amp; Applied Technologies Dictionary**

 
Definition

A mechanical or electromechanical device integral to a power transformer that changes the effective winding turns ratio while the transformer remains energized and supplying load, using discrete tap positions to adjust the transformer's secondary voltage without interrupting service.