Abstract: A device for monitoring vacuum quality of a vacuum circuit breaker, the device including at least one rigid assembly including a first stationary conductive surface that is separated by an insulating layer from a second stationary conductive surface that is grounded. The assembly forms a first capacitor having a fixed value, the first stationary conductive surface being arranged opposite an electrically active portion of the vacuum circuit breaker to form, together with the portion, a second capacitor, and an electronic circuit for measuring a variation in voltage of the first capacitor that is representative of a change in state of the vacuum of the circuit breaker.

Abstract: A device for monitoring vacuum quality of a vacuum circuit breaker, the device including at least one rigid assembly including a first stationary conductive surface that is separated by an insulating layer from a second stationary conductive surface that is grounded. The assembly forms a first capacitor having a fixed value, the first stationary conductive surface being arranged opposite an electrically active portion of the vacuum circuit breaker to form, together with the portion, a second capacitor, and an electronic circuit for measuring a variation in voltage of the first capacitor that is representative of a change in state of the vacuum of the circuit breaker.

Abstract: A cartridge having at least three shields including a mid-potential shield between two contacts and at least one partial shield between a mid-potential shield and one of the contacts, the distance between the mid-potential shield and the contacts being such that the electric field present at the edge of the contact extends from the contact to the partial shield surrounding it, or vice-versa from the partial shield to the contact, depending on the polarity of the voltage.

Abstract: A method for fixing an element to a part of an electrical apparatus may include interposing an extender between the element and the part, where the extender is able to exert forces on the element and the part to position the element with respect to the part and/or to secure the element in position with respect to the part, by friction between one side of the extender and the element and between another side of the extender and the part, and to ensure positioning and/or securing of the element with respect to the part prior to final fixing, and to perform final fixing by performing two welding operations respectively between the element and the extender and between the extender and the part.

Abstract: This cartridge comprises at least three shields comprising one shield called mid-potential shield inserted between the two contacts and at least one shield called partial shield inserted between said mid-potential shield and one of the contacts, the distance between said mid-potential shield and the contacts being selected such that the electric field present at the edge of the contact goes from the contact to the partial shield surrounding it (or vice-versa from the partial shield to the contact depending on the polarity of the voltage).

Abstract: The present invention relates to a method for fixing an element to a part belonging to an electrical apparatus, this method consisting in interposing an extender between said element and said part, said extender being able to exert forces on the element and said part so as to position the element with respect to said part and/or to secure said element in position with respect to said part, by friction on the one hand between the extender and the element and on the other hand between the extender and said part, and to thereby ensure positioning and/or securing of said element with respect to said part prior to final fixing thereof, and to then perform the above-mentioned final fixing by performing two welding operations respectively between said element and the extender and between the extender and said part.

Abstract: The present invention relates to a device for fixing a shield in a switch, said switch being housed in an enclosure comprising a cylindrical part closed by two end parts forming covers, said cylindrical part being connected at its two free ends respectively to the two end covers and comprising one or more cylindrical insulators mechanically connected to one another, at least one shield for protection of the insulators being supported by a cylindrical ring fixed between two of the above-mentioned mechanically connected parts of the enclosure, at the level of the mechanical connection between these two parts. This device is characterized in that the above-mentioned shield comprises on its external surface at least one localized material spinning point, arranged in such a way as to form at least one bearing point of the shield on the ring, so as to achieve stopping of the shield in translation in a direction parallel to the axis of the enclosure.

Abstract: The present invention relates to a device for fixing a shield in a switch, said switch being housed in an enclosure comprising a cylindrical part closed by two end parts forming covers, said cylindrical part being connected at its two free ends respectively to the two end covers and comprising one or more cylindrical insulators mechanically connected to one another, at least one shield for protection of the insulators being supported by a cylindrical ring fixed between two of the above-mentioned mechanically connected parts of the enclosure, at the level of the mechanical connection between these two parts. This device is characterized in that the above-mentioned shield comprises on its external surface at least one localized material spinning point, arranged in such a way as to form at least one bearing point of the shield on the ring, so as to achieve stopping of the shield in translation in a direction parallel to the axis of the enclosure.

Abstract: A vacuum cartridge of a hybrid circuit breaker comprises an end-plate having a groove for housing an annular coil external to the cartridge and electrically connected in series with the contacts of the cartridge. The coil is located facing the arcing contacts and is rigidly held by the groove.

Abstract: A medium voltage circuit breaker, including first and second arcing contacts, the first arcing contact being longitudinally slidable with respect to the second arcing contact between open and closed positions, first and second main contact, the first main contact being movable with respect to the second main contact between open and closed positions, a sealed enclosure filled with a high dielectric strength gas and housing the first and second arcing and main contacts, and operating mechanism for closing the first and second arcing contacts before the first and second main contacts close and for opening the first and second arcing contacts after the first and second main contacts open. The operating mechanism is mechanically coupled to the first arcing and the first main contacts and comprises a compressible linkage coupled to the first arcing contact.