Patent EA-003758-B1 (EA)
Title: Multipole electrical switchgear apparatus
Inventor: MARIN-PACHE REINALD
IPC: H01H33/666
Filed: 2001-03-30
Abstract: 1. A multipole electrical switchgear apparatus comprising: a support (83); a drive mechanism (12) equipped with a pole shaft (32) rotating around a first geometric axis (140) fixed with respect to the support; a plurality of breaking modules (14, 16, 18), each module comprising: a pair of separable contacts (90, 92) comprising at least one movable contact (90); a movable rod (100) securely affixed to the movable contact (90); a transmission lever (70, 72, 74) pivoting around a second geometric axis (142) parallel to the first geometric axis (149), said second geometric axis being common to all the breaking modules (14, 16, 18) and fixed with respect to the support; means for connecting the transmission lever to said rod; wherein further comprises a single connecting rod (40) connecting the pole shaft (32) to the transmission levers of the different breaking modules (14, 16, 18), the connecting rod (40) being articulated on the one hand on at least two coaxial cranks (36, 38) of the pole shaft (32), defining a third geometric axis (144) of pivoting parallel to the first geometric axis (140), and on the other hand on pivots (66) ensuring pivoting of each transmission lever (70, 72, 74) with respect to the connecting rod (40) around a fourth geometric axis (146) of pivoting parallel to the first geometric axis (140) and common to all the breaking modules (14, 16, 18). 2. The switchgear apparatus according to claim 1, wherein in each module, the movable rod (100) is connected to the connecting rod (70, 72, 74) by means of a link pivoting around a fifth geometric axis (148) parallel to the first geometric axis (140). 3. The switchgear apparatus according to claim 2, wherein in each module, the fifth axis (148) of pivoting is located between the second axis (142) and the fourth axis (146), closer to the second axis (142) than to the fourth axis (146). 4. The switchgear apparatus according to claim 1, wherein the connecting rod (40) is arranged in such a way as to be solicited in traction when closing of the switchgear apparatus takes place. 5. The switchgear apparatus according to claim 1, wherein the connecting rod (40) comprises a metal plate shaped in such a way that its quadratic moment with respect to an axis perpendicular to a plane containing the third (144) and fourth (146) axis is high, so that even if the forces to be applied to the different breaking modules (14, 16, 18) are different, their movement will nevertheless be simultaneous. 6. The switchgear apparatus according to claim 1, wherein the connecting rod (40) comprises a metal plate comprising two V-shaped arms (42, 44), each V-shaped arm comprising a convergent end supporting a bearing for articulation with one of the cranks (36, 38) of the pole shaft (32), and a divergent end, the divergent ends of the two V-shaped arms (42, 44) being connected to one another by a base (46) supporting bearings (60, 62, 64) for articulation with the levers (70, 72, 74) of the breaking modules. 7. The switchgear apparatus according to claim 1, wherein the means for connecting the transmission lever (70) to said movable rod (100) comprise an insulating arm (110). 8. The switchgear apparatus according to claim 1, wherein the means for connecting the transmission lever (70, 72, 74) to said movable rod (100) comprise: a contact pressure spring (122); a first support means (124) of a first end of the spring, securely affixed to the lever (70, 72, 74); a second support means (120) of a second end of the spring (122), securely affixed to the movable rod (100); a mechanical connection between the first support means (124) and the lever (70, 72, 74), such that the first support means is secured to the lever when the lever is moved in the closing direction of the switchgear apparatus. 9. The switchgear apparatus according to claim 1, wherein each breaking module comprises a frame (82) equipped with support bearings enabling pivoting of the transmission lever (70, 72, 74) around the second axis (142) of pivoting. 10. The switchgear apparatus according to claim 1, wherein the connecting rod makes an angle close to a right angle with the transmission levers and the movable rods move in translation appreciably parallel to the connecting rod. 11. The switchgear apparatus according to claim 1, wherein each breaking module comprises a vacuum cartridge (80) forming an enclosure housing the separable contacts (90, 92).