Abstract: A method and system for drying an active part of an electric transformer, by continuously determining a moisture content in the solid insulations during vapor phase drying in a drying oven and stopping this drying when an equilibrium moisture content is reached. Then, continuously determining a moisture content in the solid insulations during the retightening and geometric adjustment phase of the active part outside the drying oven and continuing with the determination of moisture content during vacuum drying once the active part is inside the hermetically sealed tank, and stopping vacuum drying when an equilibrium moisture content is reached in the solid insulations. The determination of moisture content and equilibrium moisture content is carried out by applying the diffusion equation.

Abstract: A press-clamp for an electric transformer winding formed by an upper plate having a free inner face with a first concentric circular protrusion, and an outer face joined to a concentric nut that can be screwed along a threaded bolt; a clamping force sensor having a ring-shaped body; and a lower plate having a peripheral wall defining a cavity with a second concentric protrusion and housing the ring-shaped body of the clamping force sensor and the upper plate by its inner face, the ring-shaped body of the clamping force sensor placed concentrically when aligned with the first protrusion and the second protrusion.

Abstract: A press-clamp for an electric transformer winding formed by an upper plate having a free inner face with a first concentric circular protrusion, and an outer face joined to a concentric nut that can be screwed along a threaded bolt; a clamping force sensor having a ring-shaped body; and a lower plate having a peripheral wall defining a cavity with a second concentric protrusion and housing the ring-shaped body of the clamping force sensor and the upper plate by its inner face, the ring-shaped body of the clamping force sensor placed concentrically when aligned with the first protrusion and the second protrusion.