Electrical transformers are essential devices that transfer electrical energy between different voltage levels while maintaining the same frequency. They are used in various industrial, commercial, and residential applications to step up or step down voltages for efficient power distribution and equipment operation. These devices consist of primary and secondary windings wound around a magnetic core, which allows for the transfer of energy through electromagnetic induction. Various transformer types include power transformers, distribution transformers, and isolation transformers, each designed for specific voltage and power requirements. At SIGMA Surplus, you’ll find transformers from Acme, Eaton, Square D, and Hammond, among many others from trusted manufacturers.