ADAPTOR FOR A CAPACITOR

• US 20190318873A1
• Filed: 03/12/2019
• Published: 10/17/2019
• Est. Priority Date: 04/11/2018
• Status: Active Grant

• Current Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Original Assignee: Eaton Intelligent Power Limited (Eaton Corporation PLC.)
• Inventors: Fellers, Clay Lynwood, Banks, Brent Andrew
• Granted Patent: US 10,818,434 B2
• Time in Patent Office: Days
• CPC Class Codes: H01B 17/28 Capacitor type
• CPC Class Codes: H01G 11/10 Multiple hybrid or EDL capacitors, e.g. arrays or modules housings, cases, encapsulations or mountings thereof H01G11/78
• CPC Class Codes: H01G 11/16 against electric overloads, e.g. including fuses
• CPC Class Codes: H01G 11/76 specially adapted for integration in multiple or stacked hybrid or EDL capacitors
• CPC Class Codes: H01G 2/16 with fusing elements
• CPC Class Codes: H01G 4/224 Housing; Encapsulation
• CPC Class Codes: H01G 4/38 Multiple capacitors, i.e. structural combinations of fixed capacitors
• CPC Class Codes: H01H 85/0241 Structural association of a fuse and another component or apparatus switches with built-in fuses H01H9/10, spark-gap arresters H01H85/44, transformers and inductances H01F27/402, capacitors H01G2/14, lamps H01K1/66, semiconductors H01L23/5256 or H01L23/62
• CPC Class Codes: H01H 85/165 Casings

Abstract

A system includes a capacitor including: a structure, and one or more capacitive devices at the structure; and an electrically insulating bushing including: a fuse including: a fuse body including a fuse housing, a first fuse end, and a second fuse end, the fuse housing extending from the first fuse end to the second fuse end and defining an interior space, and a fusible element in the interior space, the fusible element electrically connected to the first fuse end and the second fuse end; and an adaptor including: an adaptor body extending from a first adaptor end to a second adaptor end, the adaptor body hermetically sealed to the structure and the second adaptor end configured to receive the first fuse end, and an adaptor connection interface in the adaptor body. The first fuse end is removably connected to the adaptor at the adaptor connection interface.

Claims

1. A system comprising:

a capacitor comprising;

a structure, and

one or more capacitive devices at the structure; and

an electrically insulating bushing comprising;

a fuse comprising;

a fuse body comprising a fuse housing, a first fuse end, and a second fuse end, the fuse housing extending from the first fuse end to the second fuse end and defining an interior space, and

a fusible element in the interior space, the fusible element electrically connected to the first fuse end and the second fuse end; and

an adaptor comprising;

an adaptor body extending from a first adaptor end to a second adaptor end, the adaptor body hermetically sealed to the structure and the second adaptor end configured to receive the first fuse end, and

an adaptor connection interface in the adaptor body, wherein the first fuse end is removably connected to the adaptor at the adaptor connection interface.

2. The system of claim 1, wherein the adaptor connection interface comprises a metallic material on an inner surface of the adaptor body, the metallic material on the inner surface of the adaptor body being configured to make physical contact with the first fuse end.

3. The system of claim 1, wherein the adaptor connection interface comprises metallic adaptor threads on a first side, a second side of the adaptor connection interface is sealed to an inner surface of the adaptor body, and the first fuse end comprises metallic fuse threads that are configured to interlock with the adaptor threads to removably connect the first fuse end to the adaptor connection interface.

4. The system of claim 1, wherein the adaptor body comprises a ceramic material.

5. The system of claim 4, wherein the adaptor body comprises a polymer material.

6. The system of claim 1, wherein the adaptor body comprises a plurality of skirts, each skirt extending radially from an exterior surface of the adaptor body.

7. The system of claim 1, further comprising a filler material in the adaptor body, the filler material and portions of the fuse that are received in the adaptor body substantially filling the adaptor body.

8. The system of claim 7, wherein the adaptor body further comprises one or more ports configured to allow insertion of the filler material.

9. The system of claim 1, wherein the structure comprises a housing that encloses the one or more capacitive devices.

10. A system comprising:

a capacitor device configured to be received at a capacitor device structure; and

an adaptor configured to be hermetically sealed to the capacitor device structure, the adaptor comprising an adaptor body of an insulating material, the adaptor body comprising a sidewall that extends from the capacitor device structure and defines an interior space, the sidewall comprising an exterior surface and an interior surface and the adaptor body further comprising an electrically conductive adaptor interface in the interior space and adhered to the interior surface, wherein

the electrically conductive adaptor interface is configured to connect to a fuse that is external to and separate from the capacitor device structure to mount the fuse to the adaptor and,

when the fuse is connected to the electrically conductive adaptor interface, the fuse and the adaptor form an insulating bushing for the capacitor device.

11. The system of claim 10, wherein the adaptor further comprises a filler material, and, when the fuse is connected to the electrically conductive adaptor interface, the interior space is filled with the fuse and the filler material such that no air is in the interior space.

12. The system of claim 11, wherein the insulating material comprises a polymer.

13. The system of claim 12, wherein the electrically conductive adaptor interface comprises threads configured to interlock with corresponding threads on an exterior of the fuse.

14. The system of claim 10, wherein the electrically conductive adaptor interface comprises a metallic material.

15. A capacitor comprising:

a structure;

a plurality of capacitive devices at the structure;

a plurality of electrically insulating bushings extending outward from the structure, each of the plurality of electrically insulating bushings hermetically sealed to the structure, the plurality of electrically insulating bushings comprising at least a first electrically insulating bushing and a second electrically insulating bushing, wherein

the first electrically insulating bushing comprises;

a single-piece body formed of an electrically insulating material, the single-piece body extending from a first end of the single-piece body to a second end of the single-piece body, the first end of the single-piece body passing through a first opening in the structure and an exterior surface of the single-piece body being hermetically sealed to the structure such that the first opening is hermetically sealed; and

the second electrically insulating bushing comprises;

an electrically insulating adaptor body extending from a first end to a second end, the adaptor body comprising an electrically insulating material and an electrically conductive connection interface, the first end of the adaptor body passing through a second opening in the structure and an exterior surface of the adaptor body being hermetically sealed to the structure such that the second opening is hermetically sealed, and

a fuse comprising a fuse housing and a fusible element in the fuse housing, wherein the electrically conductive connection interface is configured to hold the fuse to the adaptor body and to electrically connect the fusible element to at least one the plurality of capacitive devices.