Gas shut-off switch
AssigneeOrmazabal Y Cia, S.L.U.
InventorsLuis RANEDO TORRES, Juan Antonio SANCHEZ RUIZ
Life of this patent
Estimating the term…
Abstract
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) with a pair of fixed contacts (3, 4) arranged diametrically opposed to each other and a movable contact (5) having a rotary motion to electrically connect said fixed contacts (3, 4); an arc chamber (6, 7) and an electric arc blowing means (8) jointly connected to the movable contact (5), wherein the arc chamber (6, 7) comprises a communication path (9, 10) with the exterior of the housing (2) that allows both the exit of the gases generated in the electric arc blowing and the entry of clean dielectric gas in said arc chamber (6, 7).
Claims9
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 the arc chamber (6) and a second part that includes the arc chamber (7), where the arc chamber (6) incorporates a fixed contact (3) and the arc chamber (7) incorporates a 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:
- the electrical contact between the movable contact (5) and each of the fixed contacts (3, 4), as well as the separation between them occurs in different arc chambers;
- the blowing means (8) is jointly connected to the movable contact (5), so that it performs the same movement path as the movable contact (5) in the gas shut-off switch (1) opening and closing;
- and in that
- the arc chamber (6, 7) comprises at least one communication path (9, 10) with the exterior of the housing (2) that allows both the exit of the gases generated in the electric arc blowing and the entry of clean dielectric gas in said arc chamber (6, 7).
The gas shut-off switch (1) according to any of the preceding claims, characterized in that the blowing means (8) of the gas shut-off switch (1) comprises at least one vane (12, 13) at each of the ends (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 the vanes (12, 13) and said contacts (3, 4, 5) towards a second portion (17) of the arc chambers (6, 7) in the gas shut-off switch (1) opening for the electric arc blowing.
Dependencies are inferred from the claim text.