Abb Research Ltd.

Abb Schweiz Ag

Marianne Pleines

Thomas Schoenemann

Martin Lakner

Jean-Claude Mauroux

Markus Keller

Xiangyang Ye

Jochen Kiefer

Mercedes Dominguez Calvo

Mercedes Calvo Dominguez

The invention relates to an improvement to the thermal load capacity of generator switches (). As is known, radiation plates () are used between generator switches () for different phases (R, Y, B) for convective dissipation of radiated heat from adjacent encapsulation side walls (). According to the invention, in the vicinity of the encapsulation cover () of a generator switch (), the radiation plate () has at least one angled metal sheet () which is used to guide at least one air flow element () of the rising air flow () in the direction of the encapsulation cover () and in order to direct the flow along the encapsulation cover (). Exemplary embodiments include: radiation plates () electrically and thermally isolated from the housing (); radiation plates () with horizontally deflecting air guidance structures () on the inner face (); angled metal sheet () whose inclination is matched to a flattened area () on the encapsulation cover (); angled metal sheet () directed at cooling elements () on the encapsulation cover (). Advantages include: generator switches () with improved heat emission, increased rated current carrying capacity, and/or a more compact configuration.

Encapsulated switching devices having heat emission elements

The basis taken is a cooling element () made of a metal or of a metal alloy having at least one cooling rib () which is connected to a metal housing () for an operating means. The intention is to provide a cooling element () which has an improved cooling capacity. The inventive cooling element () is detachably connected to the housing () by means of fixing means. The cooling element () is provided with a thermally conductive and electrically insulating coating (), and it has the same electrical potential as the housing (), but carries no current.

Cooling element

The high-power switch () according to the invention, with at least one switch pole () for guiding and switching an electric current which flows in one current flow direction when the switch is in the closed state, with the at least one switch pole () containing an inner conductor () which carries the current and containing an outer conductor () which is connected to ground potential (G) and carries a return current in the opposite direction to the current, with the outer conductor () being in the form of a housing () which surrounds the inner conductor (), is characterized in that a cooling rib arrangement () which contains cooling ribs () is arranged on the outer conductor (). At least some of the cooling ribs are advantageously arranged on a separate part of the housing (), which is not the same as the part () of the housing () which is at a minimum distance from the inner conductor (). The cooling rib arrangement () advantageously has cooling ribs both outside the housing () and inside the housing ().

High-power switchgear with cooling rib arrangement

Growing community of inventors

Winterthur, Switzerland

Marianne Pleines