Switchgear assembly with a contact gap
View Patent ↗A switchgear assembly has a contact gap and an insulating material nozzle. The insulating material nozzle at least partly encloses the contact gap. A nozzle channel for the insulating material nozzle opens with a outlet opening in a hot gas space. A deflector element is disposed within the hot gas space which defines a deflector channel. The deflector channel has a segment which has an expanding cross-section in the stream direction of a switching gas in the hot gas space.
1. A switchgear assembly, comprising:
an insulating material nozzle at least partially enclosing a contact gap of the switchgear assembly, said nozzle having a nozzle channel opening out into a hot gas space;
a deflector element disposed inside said hot gas space and formed with a deflector channel, wherein extinguishing gas discharging from said nozzle channel in a discharge direction into said hot gas space is diverted into said deflector channel, said deflector channel having a segment formed with a cross section expanding in the discharge direction.
2. The switchgear assembly according to claim 1 , wherein said segment is bounded by a sleeve surface having a shape of a truncated cone.
3. The switchgear assembly according to claim 1 , wherein said segment is bounded by a cylindrical sleeve surface that expands in steps.
4. The switchgear assembly according to claim 1 , wherein said nozzle channel has a cross section and an outlet opening, and wherein said cross section is reduced in a region of said outlet opening.
5. The switchgear assembly according to claim 1 , wherein said segment forms a transition between a substantially cylindrical sleeve surface and a tapered section.
6. The switchgear assembly according to claim 5 , wherein said tapered section constitutes a reduction in cross section at a free end of said segment facing towards said nozzle channel.
7. The switchgear assembly according to claim 1 , wherein said deflector element is formed with a sleeve surface, and said sleeve surface has radially aligned openings formed therein.
8. The switchgear assembly according to claim 7 , which comprises an angled impact wall disposed opposite from at least one of said radially aligned openings.
9. The switchgear assembly according to claim 7 , wherein said sleeve surface is a substantially cylindrical sleeve surface and said radially aligned openings are formed in said cylindrical sleeve surface.
10. The switchgear assembly according to claim 1 , wherein said deflector element is held at an end thereof facing away from said insulating material nozzle.
11. The switchgear assembly according to claim 1 , wherein said hot gas space is formed between a first contact piece and a second contact piece and said first and second contact pieces are aligned coaxially in each case.
12. The switchgear assembly according to claim 11 , wherein said deflector element is connected in one piece to one of said contact pieces.
13. The switchgear assembly according to claim 11 , wherein said deflector element is attached to a connecting element which couples said first and second contact pieces in an angularly rigid manner.
14. The switchgear assembly according to claim 1 , wherein a wall bordering said nozzle channel extends into said deflector channel.
15. The switchgear assembly according to claim 1 , wherein said deflector element is an electrically conducting element.
16. The switchgear assembly according to claim 1 , wherein said nozzle channel opens out into said hot gas space in the form of a ring.
17. The switchgear assembly according to claim 1 , wherein said deflector element is supported on an outer sleeve side.