Offering full load operating efficiencies of 97%–99%, isolation transformers come in 250+ models that collectively cover 120–600 V input range and offer secondary voltages of 120, 208, 240, or 277 V. Design fosters safety and reliability with minimized leakage current to ground, while efficiency promotes cool operation and allows transformers to be installed in sealed environments without any external cooling. Areas of use include commercial and industrial applications.