High-voltage device having ceramic spacer elements, and use thereof

Patent metadata

Field	Value
Publication number	US-11605488-B2
Application number	US-201816647595-A
Country	US
Kind code	B2
Filing date	Sep 13, 2018
Priority date	Sep 27, 2017
Publication date	Mar 14, 2023
Grant date	Mar 14, 2023

Abstract

A high-voltage device includes a housing and at least one subassembly which is electrically insulated from the housing. The at least one subassembly is spaced from the housing and mechanically connected to the housing. At least one ceramic spacer element is disposed between the housing and the at least one subassembly. A method of using the high-voltage device includes transferring heat, which is produced at connection elements of the at least one subassembly which is electrically insulated from the housing, from the subassembly through the at least one ceramic spacer element to the housing and emitting the heat from the housing to the environment.

First claim

The invention claimed is:

1. A high-voltage device, comprising:
an instrument transformer of the high-voltage device for at least one of voltages up to 1200 kV or a few thousands amps;
a housing;
at least one subassembly electrically insulated from said housing, said at least one subassembly being spaced apart from said housing and mechanically connected to said housing; and
at least one ceramic spacer element disposed between said housing and said at least one subassembly;
said at least one ceramic spacer element being a ceramic disk formed as a circular washer.

2. The high-voltage device according to claim 1 , wherein said at least one ceramic spacer element has a high electrical resistance and a high coefficient of thermal conductivity.

3. The high-voltage device according to claim 1 , which further comprises a securing device securing said at least one subassembly to said housing.

4. The high-voltage device according to claim 3 , wherein said securing device includes screws electrically insulated from said at least one subassembly.

5. The high-voltage device according to claim 1 , which further comprises at least one element of the high-voltage device, and at least one electrical contact-connection element for making electrical contact between said at least one subassembly and said at least one element of the high-voltage device inside said housing.

6. The high-voltage device according to claim 5 , wherein said at least one electrical contact-connection element is at least one screw.

7. The high-voltage device according to claim 1 , wherein said at least one subassembly being electrically insulated from said housing includes at least one connecting element for connecting at least one of electrical or conductor rails.

8. The high-voltage device according to claim 7 , wherein said at least one connecting element is configured for electrical connection to at least one of electrical supply system lines, electrical loads or electricity generators.

9. The high-voltage device according to claim 1 , wherein said at least one subassembly electrically insulated from said housing includes at least one plate-shaped element.

10. The high-voltage device according to claim 9 , wherein said at least one plate-shaped element is at least one of a parallelepipedal plate or an L-shaped element made up of plate-shaped elements.

11. The high-voltage device according to claim 1 , wherein said at least one subassembly being electrically insulated from said housing is made of copper or steel or includes at least one of copper or steel or metal alloys.

12. The high-voltage device according to claim 1 , wherein said housing is cylindrical and is made of cast iron or includes cast iron.

13. The high-voltage device according to claim 1 , wherein said at least one ceramic spacer element is at least one of made of an aluminum oxide, silicon carbide, boron nitride or aluminum nitride ceramic or includes an aluminum oxide, silicon carbide, boron nitride or aluminum nitride ceramic.

14. A method of using a high-voltage device, the method comprising the following steps:
providing a high-voltage device being an instrument transformer for at least one of voltages up to 1200 kV or a few thousands amps, the high-voltage device including:
a housing;
at least one subassembly electrically insulated from the housing, the at least one subassembly being spaced apart from the housing, being mechanically connected to the housing and having connecting elements; and
at least one ceramic spacer element disposed between the housing and the at least one subassembly, the at least one ceramic spacer element being a ceramic disk produced as a circular washer;

transferring heat produced on the connecting elements of the at least one subassembly from the at least one subassembly to the housing through the at least one ceramic spacer element; and
emitting the heat from the housing to the environment.

15. The method according to claim 14 , which further comprises using the at least one subassembly for connecting at least one of electrical lines or conductor rails.

16. The method according to claim 14 , which further comprises providing electrical contact between the at least one subassembly electrically insulated from the housing and elements in the housing through at least one electrical contact-connection element.

17. The method according to claim 16 , which further comprises providing transformer parts as the elements in the housing.

18. The method according to claim 16 , which further comprises providing at least one screw as the at least one electrical contact-connection element.

19. The method according to claim 16 , wherein the at least one electrical contact-connection element has a current-carrying capacity in a range of a thousands of amps.

Assignees

• Siemens Ag

Inventors

• Goepfert Robert
• Mueller Sebastian

Classifications

• H01F38/30

  Constructions · CPC title

• H01F27/04 Primary

  Leading of conductors or axles through casings, e.g. for tap-changing arrangements · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H01F27/22

  Cooling by heat conduction through solid or powdered fillings · CPC title

• H01F38/20

  Instruments transformers · CPC title