Abstract: A modular system applied to transformers, particularly power transformers, which comprises a structure having modules coupled between each other by fixation means, in such a manner that, the set thus formed, is positioned in the perimeter of the tank of the transformer and to which it is possible to connect several equipment and components, so that the referred components and equipment are positioned in the interior of the tank of the transformer, thus permitting the access to the referred components and equipment, when carrying out maintenance, supervision or control work, as well as to permit the optimization in the manufacture thereof, assembly, transport and installation.

Abstract: Tank for electrical transformer comprising a bottom plate, two side panels and two end panels joined to contain an insulating fluid, and reinforcements joined to the exterior of said panels, wherein the two side panels and the two end panels are vertically curving convex panels, wherein the reinforcements comprise a plurality of arched vertical reinforcements distributed horizontally along each panel. The reinforcements may comprise a plurality of bracing horizontal reinforcements joined between said vertical reinforcements. The inner arching profile of the vertical reinforcements preferably matches the outer curving convex profile of the panels. The horizontal reinforcements are preferably planar. The horizontal reinforcements are preferably located at a horizontal plane in the vertical middle of the respective panel. The horizontal reinforcements are preferably located at a middle horizontal plane or at parallel horizontal planes distributed vertically.