Electrical power component containing an insulating fluid and a condenser core

Patent metadata

Field	Value
Publication number	US-9799439-B2
Application number	US-201514948452-A
Country	US
Kind code	B2
Filing date	Nov 23, 2015
Priority date	Nov 24, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

An electrical power component, such as a bushing. The power component includes a housing, a condenser core arranged in the housing and including an electrical insulation, a space formed between the condenser core and the housing, an expansion vessel positioned adjacent and in open communication with the space between the condenser core and the housing, and an electrically insulating fluid, such as oil, contained in the space between the condenser core and the. The power component further includes one or more filler elements having a higher density and lower thermal expansion coefficient than the fluid, and the one or more filler elements are movably arranged in the expansion vessel.

First claim

What is claimed is:

1. An electrical power component comprising:
a housing,
a condenser core arranged in the housing and including an electrical insulation,
a space formed between the condenser core and the housing,
an expansion vessel containing an expansion gas and positioned adjacent and in open communication with the space between the condenser core and the housing, and
an electrically insulating fluid contained in the space between the condenser core and the housing,
one or more filler elements having a higher density and lower thermal expansion coefficient than the fluid, the one or more filler elements are movably arranged inside the expansion vessel, and
a fluid permeable barrier arranged between the expansion vessel and the space in order to hold said one or more filler elements inside the expansion vessel.

2. The electrical power component according to claim 1 , whereby the expansion vessel is arranged above the condenser core when the component is in a vertical position, and the inner diameter of the expansion vessel is larger than the inner diameter of the housing.

3. The electrical power component according to claim 1 , whereby said one or more filler elements are made of a solid material.

4. The electrical power component according to claim 1 , whereby said one or more filler elements are made of ceramic, metal or polymer.

5. The electrical power component according to claim 1 , whereby said one or more filler elements are freely movable in the expansion vessel.

6. The electrical power component according claim 1 , whereby the expansion vessel contains a plurality of said filler elements.

7. The electrical power component according to claim 6 , whereby said filler elements are spherical.

8. The electrical power component according to claim 1 , whereby the component is an electrical bushing.

9. An electrical power component comprising:
a housing,
a condenser core arranged in the housing and including an electrical insulation,
a space formed between the condenser core and the housing,
an expansion vessel containing an expansion gas and positioned adjacent and in open communication with the space between the condenser core and the housing, and
an electrically insulating fluid contained in the space between the condenser core and the housing,
one or more filler elements having a higher density and lower thermal expansion coefficient than the fluid, the one or more filler elements are movably arranged inside the expansion vessel, and
a conductor extending through the housing and the expansion vessel along a longitudinal axis of the housing,
whereby the one or more filler elements are movably connected to the conductor.

10. The electrical power component according to claim 9 , whereby the one or more filler elements that are movably connected to the conductor rotate around the longitudinal axis of the housing.

11. The electrical power component according to claim 10 , whereby a connector rotatably connects the one or more filler elements to the conductor.

12. The electrical power component according to claim 9 , whereby the expansion vessel is arranged above the condenser core when the component is in a vertical position, and the inner diameter of the expansion vessel is larger than the inner diameter of the housing.

13. The electrical power component according to claim 9 , whereby said one or more filler elements are made of a solid material.

14. The electrical power component according to claim 9 , whereby said one or more filler elements are made of ceramic, metal or polymer.

15. The electrical power component according to claim 9 , whereby said one or more filler elements contain one filler element having a size and shape, which at least partly correspond to the shape and size of the expansion vessel.

16. The electrical power component according to claim 15 , whereby said filler element is shaped as a part of a cylinder.

17. The electrical power component according to claim 15 , whereby the filler element is shaped as a cylinder having an indentation for housing the expansion gas.

18. The electrical power component according to claim 9 , whereby the component is an electrical bushing.

Assignees

• Abb Schweiz Ag

Inventors

• Sjöberg Peter
• Floresjö Robert
• Lindgren Simon
• Eriksson Thomas
• Östlund Anders

Classifications

• H01B17/34 Primary

  Insulators containing liquid, e.g. oil · CPC title

• H01B17/28

  Capacitor type · CPC title

• H01F27/14 Primary

  Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling · CPC title

• H01F27/025

  Constructional details relating to cooling · CPC title

• H01F27/02

  Casings · CPC title