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AssigneeHitachi Energy Switzerland AG
InventorsSauro VANNICOLA, Luigi DE MERCATO, Alessio FRASCARIA, Antonio CRESPI
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A lifting frame for lifting a transformer or reactor is provided that includes a frame wall section. The frame wall section extends within a frame wall section plane. A lifting opening is formed within the frame wall section, wherein a lifting opening axis is oriented normal with respect to the frame wall section plane. The frame wall section immediately surrounding the lifting opening has a thickness that increases with decreasing distance to the lifting opening axis. This construction allows for providing an edge of the lifting opening with a comparatively large surface or contact area, while avoiding an overdesign of the frame wall section thickness. An increase in the surface of the edge generally reduces a contact pressure.
A lifting frame for lifting a transformer or reactor, comprising:
The transformer of claim 15, wherein the thickness of the frame wall section increases with decreasing distance to the lifting opening axis in at least one step from a first thickness t1 to a second thickness, wherein the second thickness is larger than the first thickness.
The transformer of claim 15, wherein the thickness of the frame wall section surrounding the lifting opening shows a rotational symmetry with respect to the lifting opening axis.
A method, comprising:
Dependencies are inferred from the claim text.