Oil Immersed Type Transformer

Our oil immersed type transformer places the magnetic core and windings inside an oil tank with radiator cooling. Barrel and bell-cover tank arrangements are used for the stated capacity divisions. The S22, S20, and S13 station-transformer families are intended for conventional three-phase auxiliary-power duty and are selected by required efficiency level, rated capacity, primary voltage, secondary voltage, and loss target. The magnetic core and copper or aluminum windings are immersed in insulating oil inside a welded tank. Heat produced by core and winding losses moves into the oil and then to corrugated panels or radiators by natural circulation. Project configuration may include off-circuit taps, oil level indication, pressure relief, thermometer pockets, drain and sampling valves, lifting points, and high- and low-voltage bushings. Site acceptance should confirm oil level, sealing condition, bushing cleanliness, grounding, phase markings, tap position, insulation resistance, ratio, winding resistance, and oil test results. The foundation must remain level, the tank must be protected from mechanical impact, and adequate clearance must be provided for inspection, oil handling, and heat dissipation.

This outdoor oil-immersed station transformer transfers power through an oil-insulated active part housed in a sealed or conservator-type tank. Insulating oil provides both dielectric strength and heat transfer, while corrugated walls or radiators dissipate losses to the surrounding air. The S22, S20, and S13 series differ in loss level and design generation; rated capacity, vector group, impedance, tap range, temperature rise, and accessories are selected for the actual station-service duty.