Shop drive isolation transformers designed for industrial motor-drive and power-electronics applications. These transformers provide electrical isolation between the incoming supply and connected drive equipment while helping accommodate the electrical demands associated with variable-frequency drives and other nonlinear loads.
Compare drive isolation transformers by input voltage, output voltage, phase, kVA rating, temperature rise, enclosure construction and application requirements. Proper sizing should account for the connected drive load, system voltage and installation environment.
Drive isolation transformers are commonly used between an industrial power source and variable-frequency drives or other power-electronic motor-control equipment. In addition to providing electrical isolation, they can help establish the required voltage and provide a transformer specifically suited to demanding drive applications.
Selection should be based on the electrical requirements of the complete drive system rather than motor horsepower alone. The transformer must be sized for the connected load, input and output voltages, phase and installation conditions.
A general-purpose transformer may provide the required voltage transformation, but drive isolation transformers are intended for the electrical characteristics and duty associated with motor drives and power-electronic loads. When replacing an existing unit, match the original transformer type unless the application has been reviewed for an approved alternative.