OIL-IMMERSED TRANSFORMER

"Oil-immersed transformers use insulating oil for cooling and insulation. Core consists of iron core, windings, tank, oil, and accessories. Heat dissipates through oil to tank wall and radiators. Low losses, strong lightning and short-circuit withstand, energy-efficient, ideal for national grid upgrades.
Note: This translation was generated by AI for reference only."

DRY-TYPE TRANSFORMER

A dry-type transformer is a power transmission and distribution device that uses air or a gas such as nitrogen as its cooling medium, eliminating the need for insulating oil. Its core components include an iron core and windings insulated by epoxy resin casting or impregnation, complemented by auxiliary devices like temperature controllers and cooling fans. The windings are encased in insulating materials and dissipate heat primarily through natural air convection (or with forced cooling via fans), thereby avoiding the risks of oil leakage and fire associated with oil‑immersed transformers. Additionally, dry‑type transformers are more compact, easier to maintain, energy‑efficient, environmentally friendly, maintenance‑free, offer superior fire‑resistance, produce no pollution, and are simple to install.