Insulation fluid heating apparatus and method
US-10999897-B2 · May 4, 2021 · US
Insulating gas composition
US12283399B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12283399-B2 |
| Application number | US-202217843173-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 17, 2022 |
| Priority date | Jul 13, 2021 |
| Publication date | Apr 22, 2025 |
| Grant date | Apr 22, 2025 |
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Abstract
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An electrically insulating gas composition comprises C 3 F 7 CN, in an amount between 22% and 70% by volume and one or more inert gas selected from the list consisting of nitrogen, carbon dioxide (CO2), air and argon.
First claim
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The invention claimed is: 1. A high voltage electrical system suitable for an aircraft comprising: an enclosure containing an electrically insulating gas composition comprising: C 3 F 7 CN, in an amount between 22% and 70% by volume; one or more inert gas selected from the list consisting of nitrogen, carbon dioxide (CO 2 ), air and argon; an electrical device insulated by the electrically insulating gas composition; and a pressurisation system configured to maintain the electrically insulating gas composition in the enclosure at an absolute pressure of between 50 kPa and 200 kPa. 2. The high voltage electrical system suitable for an aircraft according to claim 1 , wherein the electrically insulating gas composition comprises C 3 F 7 CN in an amount between 22% and 40% by volume, with the remainder of the electrically insulating gas composition consisting of CO 2 , save for incidental impurities. 3. The high voltage electrical system suitable for an aircraft according to claim 1 , wherein the electrically insulating gas composition comprises C 3 F 7 CN in an amount between 22% and 70% by volume, with the remainder of the electrically insulating gas composition consisting of one or more of carbon dioxide, nitrogen and oxygen. 4. The high voltage electrical system suitable for an aircraft according to claim 3 , wherein the electrically insulating gas composition comprises a mixture of 30% by volume C 3 F 7 CN in a binary mixture with 70% carbon dioxide. 5. The high voltage electrical system suitable for an aircraft according to claim 3 , wherein the electrically insulating gas composition comprises a mixture of 30% by volume C 3 F 7 CN in a binary mixture with 70% nitrogen. 6. The high voltage electrical system suitable for an aircraft according to claim 3 , wherein the electrically insulating gas composition comprises a mixture of 40% C 3 F 7 CN by volume, in a binary mixture with 60% carbon dioxide. 7. The high voltage electrical system suitable for an aircraft according to claim 3 , wherein the electrically insulating gas composition comprises a mixture of 70% C 3 F 7 CN by volume, in a binary mixture with 30% carbon dioxide. 8. A method of insulating a high voltage electrical system of an aircraft, the method comprising: providing an enclosure containing a high voltage electrical component, filled with an insulating gas at a pressure between 10 kPa and 200 kPa, the insulating gas comprising: C 3 F 7 CN, in an amount between 22% and 70% by volume; one or more inert gas selected from the list consisting of nitrogen, carbon dioxide (CO 2 ), air and argon. 9. A method according to claim 8 , wherein the insulating gas comprises approximately 25% C 3 F 7 CN and 75% of an inert buffer gas, and the enclosure is arranged to be maintained at a pressure of between 60 kPa and 100 kPa.
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- What does patent US12283399B2 cover?
- An electrically insulating gas composition comprises C 3 F 7 CN, in an amount between 22% and 70% by volume and one or more inert gas selected from the list consisting of nitrogen, carbon dioxide (CO2), air and argon.
- Who is the assignee on this patent?
- Rolls Royce Plc
- What technology area does this patent fall under?
- Primary CPC classification H01B3/02. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 22 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).