The present invention relates to a double dash pot core clamping device for pressing windings of high rating power transformers the top windings provided with an insulated layer, the device comprising a plurality of rectangular shaped beam structures placed parallely, connected by a number of cross bars along the length and the end faces are fixed up by tie rods each Top End Frame provided with four number dash pots placed along the beam the Top End Frames connected to a bottom plate by means of a plurality of clamp plates and the assembly resting on a numbers of bottom feets and a selected number of dash pots are activated to hydraulically press the top face insulated covered windings.
