These compactly built power supplies adopt digitally controlled based IGBT Inverter design and are available at power ratings from 25 KW to 1500 KW and frequency range of 500 Hz to 10000 Hz. A near-unity high power factor of (>0.98) is achieved throughout the melt cycle. Field reports indicate a reduction in energy consumption of up to 3 % due IGBT based design. The system provides 100% isolation from input power in case of a short circuit at the output. Modular design facilitates easier maintenance and component replacements. An optional touch screen HMI-based front control panel is provided for easier access and view.