Switching device

Patent metadata

Field	Value
Publication number	US-11557448-B2
Application number	US-201917045928-A
Country	US
Kind code	B2
Filing date	Apr 16, 2019
Priority date	Apr 19, 2018
Publication date	Jan 17, 2023
Grant date	Jan 17, 2023

Abstract

In an embodiment a switching device includes at least one stationary contact in a switching chamber containing a gas comprising H 2 and one movable contact in the switching chamber, wherein the switching chamber has a switching chamber wall and a switching chamber base, and wherein the switching chamber at least partially comprises a polymer material configured to release hydrogen when heated.

First claim

The invention claimed is:

1. A switching device comprising:
at least one stationary contact in a switching chamber containing a gas comprising H 2 ; and
at least one movable contact in the switching chamber,
wherein the switching chamber has a switching chamber wall and a switching chamber base,
wherein he switching chamber wall has at least one opening,
wherein the at least one stationary contact projects through the opening in the switching chamber wall,
wherein the movable contact is connected to a shaft that projects through an opening in the switching chamber base,
wherein the switching chamber wall and the switching chamber base are arranged in relation to one another such that a space is formed which is enclosed except for the above described openings,
wherein the switching chamber base at least partially comprises a polymer material configured to release hydrogen when heated, and/or
wherein the switching chamber wall at least partially comprises the polymer material configured to release the hydrogen when heated.

2. The switching device according to claim 1 , wherein the switching chamber base has a plastic shield comprising the polymer material.

3. The switching device according to claim 1 , wherein the switching chamber base consists essentially of the polymer material.

4. The switching device according to claim 1 , wherein the switching chamber wall consists essentially of the polymer material.

5. The switching device according to claim 1 , wherein the polymer material comprises a polyoxymethylene.

6. The switching device according to claim 5 , wherein the polyoxymethylene has a (CH 2 O) n structure.

7. The switching device according to claim 1 , wherein at least one blowout magnet is arranged in the switching chamber.

8. The switching device according to claim 1 , wherein the gas has an H 2 content of at least 50%.

9. The switching device according to claim 1 , wherein the at least one stationary contact comprises copper and the one movable contact comprises copper.

10. The switching device according to claim 1 , wherein the at least one stationary contact comprises copper and a further metal and the one movable contact comprises copper and the further metal.

11. The switching device according to claim 10 , wherein the further metal is W, Ni and/or Cr.

12. The switching device according to claim 1 , wherein the one movable contact is connected to an armature comprising a magnetic core via the shaft.

13. The switching device according to claim 12 , further comprising a housing and a magnetic coil, wherein the switching chamber and the magnetic coil are located inside the housing one above another in an axial direction, wherein the magnetic coil surrounds the magnetic core, and wherein magnetic coil is configured to move the magnetic core via a magnetic field.

14. A switching device comprising:
at least one stationary contact in a switching chamber containing a gas comprising H 2 ; and
at least one movable contact in the switching chamber,
wherein the switching chamber has a switching chamber wall and a switching chamber base,
wherein he switching chamber wall has at least one opening,
wherein the at least one stationary contact projects through the opening in the switching chamber wall,
wherein the movable contact is connected to a shaft that projects through an opening in the switching chamber base,
wherein the switching chamber wall and the switching chamber base are arranged in relation to one another such that a space is formed which is enclosed except for the above described openings, and
wherein the switching chamber base and/or the switching chamber wall at least partially comprise(s) a polymer material configured to release hydrogen when heated.

15. The switching device according to claim 14 , wherein the switching chamber base has a plastic shield comprising the polymer material.

16. The switching device according to claim 14 , wherein the switching chamber base consists essentially of the polymer material.

17. The switching device according to claim 14 , wherein the switching chamber wall consists essentially of the polymer material.

18. The switching device according to claim 14 , wherein the polymer material comprises a polyoxymethylene.

19. The switching device according to claim 18 , wherein the polyoxymethylene has a (CH 2 O) n structure.

20. The switching device according to claim 14 , wherein the gas has an H 2 content of at least 50%.

Assignees

• Tdk Electronics Ag

Inventors

• Hoffmann Robert
• Werner Frank

Classifications

• H01H9/302 Primary

  wherein arc-extinguishing gas is evolved from stationary parts · CPC title

• H01H33/38

  using electromagnet · CPC title

• H01H33/182

  using permanent magnets (H01H33/187 takes precedence) · CPC title

• H01H2050/025

  containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction · CPC title

• H01H33/22

  Selection of fluids for arc-extinguishing · CPC title