High-voltage, high-frequency and high-power transformer having a core (1) onwhich a primary winding (2) is disposed on which a secondary winding (4) isdisposed in an insulated manner, whereupon the entire assembly is housed andmounted in an insulator (3), wherein the insulator (3) is made up of two partsorhalves (6) and (7) symmetrical with respect to a transverse vertical plane,eachpart having a hollow tubular element (3.1) housed inside an outer housing(3.2)of each half of the insulator, defining in each part an annular space (3.3)comprised between the outer wall of the tubular element (3.1) and the innerwallof the outer housing (3.2), where the secondary or high-voltage winding isdisposed, the insulator (3) presenting in its outer housing (3.2) a slot (5),whichis situated at zero volts level, and though which the oil penetrates towardsthesecondary winding.
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