Vacuum interrupter and high-voltage switching assembly

Patent metadata

Field	Value
Publication number	US-2021327666-A1
Application number	US-201917264932-A
Country	US
Kind code	A1
Filing date	Jul 24, 2019
Priority date	Aug 1, 2018
Publication date	Oct 21, 2021
Grant date	—

Abstract

A vacuum interrupter includes a housing having at least one annular ceramic insulating element which forms a vacuum chamber. A contact system has two contacts which are movable relative to one another. A capacitive element has two electrodes and a dielectric material disposed between the electrodes. The capacitive element is form-lockingly mounted on the insulating element and has a capacitance between 400 pF and 4000 pF. A high-voltage switching assembly including the vacuum interrupter is also provided.

First claim

1 - 15 . (canceled)

16 . A vacuum interrupter, comprising:
a housing having at least one annular ceramic insulating element forming a vacuum chamber; a contact system having two contacts being moveable relative to one another; and a capacitive element having two electrodes and a dielectric material disposed between said electrodes, said capacitive element being form-lockingly mounted on said insulating element, and said capacitive element having a capacitance of between 400 pF and 4000 pF.

17 . The vacuum interrupter according to claim 16 , which further comprises a resistive element disposed on said at least one insulating element in addition to said capacitive element.

18 . The vacuum interrupter according to claim 16 , wherein said at least one insulating element has a surface, said capacitive element includes a dielectric material, and at least said dielectric material is applied in a layered configuration to said surface of said at least one insulating element.

19 . The vacuum interrupter according to claim 16 , wherein said at least one insulating element has an outer surface, and said capacitive element is disposed on said outer surface of said at least one insulating element.

20 . The vacuum interrupter according to claim 17 , wherein said capacitive element and said resistive element are connected in series.

21 . The vacuum interrupter according to claim 17 , wherein said resistive element is form-lockingly connected to said at least one insulating element.

22 . The vacuum interrupter according to claim 17 , wherein said resistive element has a resistance of between 100 ohms and 1500 ohms.

23 . The vacuum interrupter according to claim 17 , wherein said resistive element has a resistance of between 10 8 and 10 15 ohms.

24 . The vacuum interrupter according to claim 16 , wherein said at least one insulating element has a surface, said dielectric material is applied to said surface of said at least one insulating element as a layer, and said layer has a thickness of from 5 μm to 150 μm.

25 . The vacuum interrupter according to claim 16 , wherein said at least one insulating element has a surface, said dielectric material is applied to said surface of said at least one insulating element as a layer, and said layer has a thickness of from 1 mm to 5 mm.

26 . The vacuum interrupter according to claim 16 , wherein said at least one insulating element has one upper and one lower end face relative to an extension of said at least one insulating element along a switching axis, and said electrodes are disposed on said one upper and said one lower end face of said at least one insulating element.

27 . The vacuum interrupter according to claim 26 , wherein said at least one insulating element includes a plurality of insulating elements, and said electrodes are integrated in soldered connections between said insulating elements.

28 . The vacuum interrupter according to claim 16 , wherein said at least one insulating element has an outer surface, and one of said electrodes is applied to said outer surface of said at least one insulating element as a layer.

29 . The vacuum interrupter according to claim 28 , wherein said capacitive element is disposed on said outer surface of said at least one insulating element in an alternating layered configuration of one of said electrodes, said dielectric material and another of said electrodes.

30 . The vacuum interrupter according to claim 16 , wherein said dielectric material contains a ferro-electric material, titanate or barium titanate.

31 . A high-voltage switching assembly, comprising:
a vacuum interrupter according to claim 16 ; and a further interrupter unit connected in series with said vacuum interrupter.

32 . The high-voltage switching assembly according to claim 31 , wherein said further interrupter unit is a vacuum interrupter or a gas-insulated switch.

Assignees

• Siemens Energy Global Gmbh & Co Kg

Inventors

• Benkert Katrin
• Koletzko Martin
• Nikolic Paul Gregor

Classifications

• H01H33/66261

  Specific screen details, e.g. mounting, materials, multiple screens or specific electrical field considerations · CPC title

• H01H2033/6623

  Details relating to the encasing or the outside layers of the vacuum switch housings · CPC title

• H01H1/0203

  specially adapted for vacuum switches · CPC title

• H01H2033/66284

  Details relating to the electrical field properties of screens in vacuum switches · CPC title

• H01H33/66207 Primary

  Specific housing details, e.g. sealing, soldering or brazing · CPC title