Patent ID: 7563161
Filing Date: 2009-07-21
Classification: H01H

Abstract:
1. A control device for actuating at least two items of switchgear in co-ordinated manner, which items are electrically connected together in series to constitute a switchgear assembly in which a vacuum first item of switchgear ( 1 ) that performs interruption in a vacuum includes a pair of contacts ( 5 , 6 ) that can be separated to switch from a closed position to an open position, the control device including a main drive shaft ( 2 ) for actuating a second item of switchgear ( 10 ) immersed in a gaseous insulating fluid (G 2 ) contained in a certain volume (V 2 ) at a determined pressure (P 2 ), the control device further including an auxiliary shaft ( 4 ) suitable for being moved by coupling means ( 3 ) to enable a moving contact ( 5 ) of the first item of switchgear ( 1 ) to be driven when said main shaft ( 2 ) is moved, said moving contact ( 5 ) being held pressed against the other contact ( 6 ) of said first item of switchgear ( 1 ), when said first item of switchgear is in the closed position, by a force (F c ) chosen to generate a contact pressure higher than a determined value, said control device being characterized in that said auxiliary shaft ( 4 ) passes in leaktight manner through a wall ( 7 A, 7 ′) which separates said volume (V 2 ) of gaseous insulating fluid (G 2 ) from another volume (V 1 ) of fluid (G 1 ) at a lower pressure (P 1 ), the difference between the respective pressures (P 2 , P 1 ) of the two fluids (G 1 , G 1 ) procuring a certain force (F p ) which is applied to said auxiliary shaft ( 4 ) and which participates in said contact pressure force (F c ).