An oil lmmersed transformer uses high-grade insulating oil as both a dielectric medium and a coolant. The core and windings are fully submerged in the oil, which effectively dissipates heat generated during operation. This design allows the unit to handle substantial electrical loads while maintaining stable internal temperatures. JUCEG engineers select only inhibited mineral oils or natural ester fluids that meet IEC 60296 and ASTM D3487 standards, ensuring oxidation stability and superior heat transfer. The tank is sealed to prevent moisture ingress, and a conservator system or hermetically sealed design accommodates oil expansion, safeguarding internal components over decades of cycling.
With 20 years of field experience, JUCEG has refined every aspect of the oil lmmersed transformer. Our manufacturing facility integrates automated core cutting, foil winding, and vacuum drying ovens to eliminate residual moisture. Each unit undergoes routine tests including insulation resistance measurement, turns ratio verification, and short-circuit impedance checks, followed by type and special tests when required. The result is a portfolio covering distribution transformers from 25 kVA up to 20 MVA and power transformers capable of handling 230 kV class voltages, all tailored to specific grid codes.
