Ascend Electronics standard Autotransformers are often used to step up or down between voltages in the 110-117-120 volt range and voltages in the 220-230-240 volt range, e.g., to output either 110, 115 or 120V (with taps) from 230V input, allowing equipment from a 100 or 120V region to be used in a 230V region respectively equipment from a 230V region to be used in a 110/120 volt region. A second application is to increase the voltage to compensate for line loss, for example from 110V back to 120V.  

Please also refer to Ascend Electronics Voltage Booster especially designed for that purpose! The Ascend Electronics Voltage Boosters are smaller, lighter and cheaper than a standard autotransformer and much cheaper and smaller then dual-winding transformer however neither the autotransformer nor the voltage booster does provide electrical isolation.

Many of Ascend Electronics Autotransformers have multiple output taps to select the right output voltage in an application!

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