Insulation of a switchgear device of vacuum cartridge type by insert moulding
AssigneeSchneider Electric Industries SAS
InventorsLudovic Martin, Christian Mennessier, Catherine Herault, Bruno Chatelet
Life of this patent
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Abstract
A vacuum cartridge (1) is manufactured with a dielectric coating (22) made from elastomer directly on the enclosure of the chamber (2) of the cartridge (1). To prevent the elastomer from infiltrating into the chamber (2) of the cartridge and/or its enclosure from breaking, cover-plates (26) performing mechanical protection and dielectric deflection cover the covers (61, 62) of the chamber (2) and their braze (8) with the ceramic tube (4).
Claims19
Switchgear device comprising:
- a sealed chamber extending along a longitudinal axis wherein there are housed two contacts that are movable with respect to one another along the axis, wherein the enclosure of the chamber comprises a tubular part open at the ends thereof and two conducting covers securedly affixed to the tubular part by a junction area, each of the covers comprising an end-plate extended on its periphery by a side wall;
- two conducting cover-plates surrounding the covers, each of the cover-plates comprising a base wall and a peripheral side wall extending along the axis so that the junction area and an end of the tubular part are located in the cover-plate;
- and an elastomer insulating cladding of said enclosure of the chamber, wherein the interface between the cladding and tubular part, respectively cover-plates, is tightly sealed.
Method for insulating a controlled-atmosphere switchgear device comprising a tightly sealed chamber delineated by an enclosure the tubular central part whereof is closed by two conducting end covers at the level of a junction area, each end cover comprising an end-plate extended on its periphery by a side wall comprising the junction area, said method comprising:
- protection of the covers by cover-plates that extend to also cover the junction areas;
- positioning of the switchgear device securedly attached to the cover-plates in a mould;
- injecting an elastomer into the mould and vulcanization thereof.
Vacuum cartridge comprising a tubular part open at the ends thereof and two conducting covers made of an end-plate extended on its periphery by a side wall which are securedly affixed to said tubular part by a junction area so as to form a sealed chamber extending along a longitudinal axis;
- wherein two conducting cover-plates surround the covers of the sealed chamber, each of the cover-plates comprising a base wall and a peripheral side wall extending along the axis so that the junction area and an end of the tubular part are located in the cover-plate;
- wherein the sealed chamber is at a lower pressure than atmospheric pressure and comprises a pair of a stationary contact securedly affixed to one of the covers and a movable contact which moves through the other cover and its cover-plate so as to form a switchgear device;
- said cartridge further comprising an elastomer insulating cladding of said switchgear device, wherein the interface between the cladding and tubular part, respectively cover-plates, is tightly sealed.
Dependencies are inferred from the claim text.