SUPERIOR ELECTRIC's 126U variable transformers, part of the 126-226 series, are designed for versatile power control in industrial settings. These transformers operate across a wide frequency range (50-2000 Hz) and are available in single and three-phase configurations, catering to diverse applications. They feature POWERKOTE coils and offer adjustable output voltage through manual or motor-driven operation. Motor-driven models include speed options for precise control, while plug-in units provide convenience with integrated cord-plugs, fuses, and output receptacles. The transformers are suitable for a range of load types, with ratings for constant current and constant impedance loads.