Encapsulated switching devices having heat emission elements

• Main Authors: YE XIANGYANG, SCHOENEMANN THOMAS, PLEINES MARIANNE, LAKNER MARTIN, MAUROUX JEAN-CLAUDE
• Format: Patent
• Language: English
• Published: 24.03.2005
• Edition: 7
• Subjects: BOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLYOR DISTRIBUTION OF ELECTRIC POWER; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; PRINTED CIRCUITS

The invention relates to an improvement to the thermal load capacity of generator switches (20, 21, 22). As is known, radiation plates (5, 50, 51, 52) are used between generator switches (20, 21, 22) for different phases (R, Y, B) for convective dissipation of radiated heat from adjacent encapsulation side walls (30b). According to the invention, in the vicinity of the encapsulation cover (3a) of a generator switch (20, 21, 22), the radiation plate (5, 50, 51, 52) has at least one angled metal sheet (50a) which is used to guide at least one air flow element (9) of the rising air flow (9) in the direction of the encapsulation cover (3a) and in order to direct the flow along the encapsulation cover (3a). Exemplary embodiments include: radiation plates (5, 50, 51, 52) electrically and thermally isolated from the housing (3); radiation plates (5, 50, 51, 52) with horizontally deflecting air guidance structures (51a, 51c) on the inner face (5a); angled metal sheet (50a) whose inclination is matched to a flattened area (30a) on the encapsulation cover (3a); angled metal sheet (50a) directed at cooling elements (6) on the encapsulation cover (3a). Advantages include: generator switches (20, 21, 22) with improved heat emission, increased rated current carrying capacity, and/or a more compact configuration.