Gas shut-off switch

1. A gas shut-off switch ( 1 ) provided with various operating positions and intended to be isolated in a dielectric gas inside an electrical switchgear cell ( 19 ) comprising at least one housing ( 2 ), said housing ( 2 ) being structured in two parts, which in turn comprises:

a first part that includes a first arc chamber ( 6 ) and a second part that includes a second arc chamber ( 7 ), where the first arc chamber ( 6 ) incorporates a first fixed contact ( 3 ) and the second arc chamber ( 7 ) incorporates a second fixed contact ( 4 );

a movable contact ( 5 ) having a rotary motion to electrically connect with said fixed contacts ( 3 , 4 ); and

at least one electric arc blowing means ( 8 );

characterized in that:

an electrical contact and separation between the movable contact ( 5 ) and each of the fixed contacts ( 3 , 4 ) occurs in different arc chambers;

the blowing means ( 8 ) is jointly connected to the movable contact ( 5 ) to perform a same movement path as the movable contact ( 5 ) in the gas shut-off switch ( 1 ) opening and closing; and in that

each of the first arc chamber ( 6 ) and the second arc chamber ( 7 ) comprises at least one communication path ( 9 , 10 ) with an exterior of the housing ( 2 ) that allows both an exit of gases generated in an electric arc blowing and entry of clean dielectric gas in the first arc chamber ( 6 ) and the second arc chamber ( 7 ).

2. The gas shut-off switch ( 1 ) according to claim 1 , characterized in that a pair fixed contacts ( 3 , 4 ) are arranged diametrically opposite each other and the movable contact ( 5 ) can electrically connect the pair of fixed contacts ( 3 , 4 ).

3. The gas shut-off switch ( 1 ) according to claim 2 , characterized in that the gas shut-off switch ( 1 ) comprises at least one ground contact ( 11 ) for a ground operating position of the gas shut-off switch ( 1 ), so that said gas shut-off switch ( 1 ) comprises three operating positions, connection, opening and grounding.

4. The gas shut-off switch ( 1 ) according to claim 1 , characterized in that the blowing means ( 8 ) of the gas shut-off switch ( 1 ) comprises at least one vane ( 12 , 13 ) at each end ( 14 , 15 ) of the movable contact ( 5 ), configured to compress the dielectric gas in a first portion ( 16 ) of the arc chambers ( 6 , 7 ) and forcing said compressed dielectric gas to pass through spaces between the ends ( 14 , 15 ) of the movable contact ( 5 ) and the fixed contacts ( 3 , 4 ), and through spaces between two vanes ( 12 , 13 ) and the movable contact ( 5 ) and the fixed contacts ( 3 , 4 ) towards a second portion ( 17 ) of the first arc chamber ( 6 ) and the second arc chamber ( 7 ) in the gas shut-off switch ( 1 ) opening for the electric arc blowing.

5. The gas shut-off switch ( 1 ) according to claim 4 , characterized in that the second portion ( 17 ) of the first arc chamber ( 6 ) and the second arc chamber ( 7 ) comprises communication paths ( 9 , 10 ) between an inside and an outside of the housing ( 2 ).

6. The gas shut-off switch ( 1 ) according to claim 5 , characterized in that the communication paths ( 9 , 10 ) comprise a gas cooling grid.

7. The gas shut-off switch ( 1 ) according to claim 4 , characterized in that the movable contact ( 5 ) and the blowing means ( 8 ) jointly move around a rotation axis ( 18 ).

8. The gas shut-off switch ( 1 ) according to claim 7 , characterized in that the rotation axis ( 18 ) is divided into three sections, so that each section of axis ( 18 ) comprises the movable contact ( 5 ) and the blowing means ( 8 ), so that three corresponding phases of the gas shut-off switch ( 1 ) can be separated or assembled.

9. The gas shut-off switch ( 1 ) according to claim 7 , characterized in that the movable contact ( 5 ), the blowing means ( 8 ) and the rotation axis ( 18 ) form a solid piece that is configured as a single assembly.