An on-load tap changer with semiconductor IGBT switching elements for uninterrupted switching over between winding taps of a tapped transformer, has two load branches connectable with the respective winding taps and each load branch is electrically connected with a common load output line through a respective series circuit consisting of two oppositely connected IGBTs. The sealing member has proximal and distal end areas, and defines a resilient seal element located at the proximal end area and a receiving portion formed from the distal end area. The deallocated state estimation module refers to the operation data and the capacity data to extract an overloaded server from the plurality of physical servers, load of the overloaded server exceeding a threshold value depending on the resource capacity. 70<f2\u221a{square root over )}<0.