The EFD20/10/7 is a type of three-phase power transformer manufactured by Feryster, a leading manufacturer of power transformers. This transformer is designed to rectify and control the voltage of three-phase AC systems. It can handle up to 20,000 VA (20kVA) of power at a primary voltage up to 10 kV. It has a utilization frequency of 50/60 Hz, ranging between 400 and 3Ø 600 Volts on the secondary side. Its insulation class is F and its version is open (NPT). The EFD20/10/7 is equipped with 2 independent secondary windings that can be used in multiple configurations such as dual voltage, step-up/down, and autotransformer. The EFD20/10/7 is also equipped with overload protection, thermal overload protection, and overload relay equipped with fuses for each winding. This transformer is safe, efficient, and extremely reliable, and is ideal for use in industrial, marine, and commercial applications.