Ventilated drive isolation transformers are purpose-built to provide the required voltage change for AC and DC variable speed drives. The separate primary and secondary windings provide electrical isolation between the incoming line and the VFD input; the ventilated core offers low heat emissions.
Drive isolation transformers are designed to withstand the mechanical stresses, voltage distortions, and heating associated with motor drives. They provide all the benefits of a line reactor, with the extra reactance reducing harmonics and the effects of voltage and current distortion caused by the variable speed drive. In addition, drive isolation transformers provide the following advantages:
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