SESTFt is an oil-free transformer bushing with a solid active part made of resin-impregnated paper and a condenser control. The air side housing is a silicone composite material. This bushing with dry filling is designed for rated voltages of 24 to 550 kV and rated currents up to 6000 A.
The insulating body of the RIS condenser bushing (RIS = Resin Impregnated Synthetic) is made of plastic web vacuum-impregnated with epoxy resin. During the winding process, conductive layers made of aluminum foil are inserted between the paper for grading the electric field. Thanks to their good conductivity, optimum voltage distribution is guaranteed even in case of rapid voltage changes.
All bushings are designed to comply with IEC Standard 60137 and tested accordingly. Bushings that comply with IEEE Standard or other national regulations are available on request.