Power Transformers — Technical Specifications. Power range: all standard and intermediate ratings from 2.5 MVA to 25 MVA. Voltage range: all levels from 20 to 36 kV. Phases: single-phase or three-phase. Tap changer: off-circuit or on-load. Cooling: ONAN and/or ONAF. Installation: indoor and/or outdoor. Loss class: according to customer requirements. Conductors: copper. Terminals: porcelain bushings, cable box or side outlets.
Construction
Usually designed with a conservator tank. Removable radiator banks are preferred for cooling. Depending on the installation location and application criticality, they are equipped with more protective devices than distribution transformers.
