GB1450697A - High voltage electrical insulator - Google Patents
High voltage electrical insulatorInfo
- Publication number
- GB1450697A GB1450697A GB5667973A GB5667973A GB1450697A GB 1450697 A GB1450697 A GB 1450697A GB 5667973 A GB5667973 A GB 5667973A GB 5667973 A GB5667973 A GB 5667973A GB 1450697 A GB1450697 A GB 1450697A
- Authority
- GB
- United Kingdom
- Prior art keywords
- insulator
- semiconductive layer
- bell
- insulator body
- semiconductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/50—Insulators or insulating bodies characterised by their form with surfaces specially treated for preserving insulating properties, e.g. for protection against moisture, dirt, or the like
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
- H01B17/40—Cementless fittings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
1450697 Electric insulators O NIGOL 6 Dec 1973 [8 Dec 1972] 56679/73 Heading H2C The body 10 of an insulator has its surfaces 17a, 17b entirely covered with a semiconductive layer, e.g. a glaze in accordance with Specification 1,408,210 and is such that the total of protected creepage distances KF is at least as great as the effective air clearance, namely the sum of distances AH, and the minimum air clearance AB is at least 3À5 inches, this distance being determined by the "splashing distance" of rain falling at 45 degrees to the axis of the insulator and the point K also being on a radius of 3À5 inches from point B. The surface resistively of the semiconductive layer should lie in the range of 5 to 200 megohms per square depending on system voltage in order that sufficient heat should be generated to inhibit moisture deposition. The electrical strength of the semiconductive layer in the protected areas is 10 kilovolts per inch. The semiconductive layers increase the capacitance of the insulator body as shown diagrammatically in Fig. 2. This results in an increase in the capacitive current which, flowing in the semiconductive layer, contributes to the surface heating. A string of six elements of the type shown in Fig. 1 having resistance values between 30 and 100 megohms give satisfactory performance on 230 kv A.C. lines. In further embodiments each insulator body comprises a plurality of downwardly depending bell-shaped portions (20<SP>1</SP>, 20<SP>11</SP>, 20<SP>111</SP>), Figs. 3-5, not shown); or a plurality of flared cones (30, Fig. 6, not shown) bonded together with conductive cement (31), which may alternate with bell-shaped spacers (34, Fig. 7, not shown). In still further embodiments (Figs. 8 and 9, not shown) the insulator body provides first one bell-shaped portion (35) with an upper terminal provided by a semi-conductive layer of relatively high conductivity (39, Fig. 8) or a metal cap (40, Fig. 9) and a lower terminal provided by a metal post (36, Figs. 8 and 37, Fig. 9) cemented into the insulator body by conductive cement grout 38.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00313588A US3819851A (en) | 1972-12-08 | 1972-12-08 | High voltage electrical insulator having an insulator body the entire surface of which is covered by a semiconductive glaze |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1450697A true GB1450697A (en) | 1976-09-22 |
Family
ID=23216323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5667973A Expired GB1450697A (en) | 1972-12-08 | 1973-12-06 | High voltage electrical insulator |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US3819851A (en) |
| JP (1) | JPS5759607B2 (en) |
| AR (1) | AR196706A1 (en) |
| BE (1) | BE808300A (en) |
| BR (1) | BR7309570D0 (en) |
| CA (1) | CA972044A (en) |
| DE (1) | DE2359945A1 (en) |
| ES (1) | ES420102A1 (en) |
| FR (1) | FR2209988B1 (en) |
| GB (1) | GB1450697A (en) |
| IE (1) | IE38465B1 (en) |
| IT (1) | IT1004656B (en) |
| LU (1) | LU68948A1 (en) |
| NL (1) | NL7316465A (en) |
| ZA (1) | ZA738268B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130169263A1 (en) * | 2011-12-16 | 2013-07-04 | Arteche Lantegi Elkartea, S.A. | High-voltage voltage divider and connector comprising said divider |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3941918A (en) * | 1973-01-22 | 1976-03-02 | Canadian Porcelain Company Limited | Electrical insulator including an insulation shell having hardware members secured thereto by cement containing graphite fibers |
| US4891473A (en) * | 1989-05-22 | 1990-01-02 | Olaf Nigol | High voltage insulators constructed to have plural dry bands in use |
| US5548089A (en) * | 1994-01-13 | 1996-08-20 | Cooper Industries, Inc. | Bushing for gas-insulated switchgear |
| US8704097B2 (en) * | 2012-01-23 | 2014-04-22 | General Electric Company | High voltage bushing assembly |
| US8716601B2 (en) * | 2012-02-08 | 2014-05-06 | General Electric Company | Corona resistant high voltage bushing assembly |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1661823A (en) * | 1921-06-04 | 1928-03-06 | Locke Insulator Corp | Insulator |
| US1768948A (en) * | 1921-12-03 | 1930-07-01 | Westinghouse Electric & Mfg Co | High-voltage insulator |
| FR577253A (en) * | 1923-03-29 | 1924-09-03 | Motor Columbus Sa D Entpr S El | Suspension insulator |
| US1742628A (en) * | 1927-05-11 | 1930-01-07 | Barfoed Svend | High-tension insulator |
| GB312205A (en) * | 1928-02-20 | 1929-05-21 | Fritz Berg | Insulator for electric live wires |
| GB310021A (en) * | 1928-04-20 | 1929-10-24 | Bbc Brown Boveri & Cie | Improvements in electric insulators |
| DE914141C (en) * | 1938-02-11 | 1954-06-28 | Porzellanfabrik Kahla | Ceramic insulating body with rain shields |
| FR50462E (en) * | 1939-03-02 | 1940-11-14 | Electricite De Paris Soc D | Insulator for high voltage overhead lines |
| GB586065A (en) * | 1945-05-21 | 1947-03-05 | Taylor Tunnicliff And Company | Improvements in electric insulators |
| GB1098958A (en) * | 1965-11-02 | 1968-01-10 | Doulton & Co Ltd | Improvements relating to electrical insulators |
| GB1144430A (en) * | 1968-01-17 | 1969-03-05 | Doulton & Co Ltd | Electrical insulator assembly with improved temperature characteristics |
| JPS493816B1 (en) * | 1969-10-11 | 1974-01-29 |
-
1972
- 1972-12-08 US US00313588A patent/US3819851A/en not_active Expired - Lifetime
-
1973
- 1973-10-25 ZA ZA00738268A patent/ZA738268B/en unknown
- 1973-10-29 CA CA184,464A patent/CA972044A/en not_active Expired
- 1973-10-30 ES ES420102A patent/ES420102A1/en not_active Expired
- 1973-11-01 IE IE1975/73A patent/IE38465B1/en unknown
- 1973-11-12 AR AR250960A patent/AR196706A1/en active
- 1973-11-30 NL NL7316465A patent/NL7316465A/xx not_active Application Discontinuation
- 1973-12-01 DE DE2359945A patent/DE2359945A1/en active Pending
- 1973-12-06 BR BR9570/73A patent/BR7309570D0/en unknown
- 1973-12-06 GB GB5667973A patent/GB1450697A/en not_active Expired
- 1973-12-06 BE BE138583A patent/BE808300A/en unknown
- 1973-12-06 LU LU68948A patent/LU68948A1/xx unknown
- 1973-12-07 IT IT70603/73A patent/IT1004656B/en active
- 1973-12-07 JP JP48137282A patent/JPS5759607B2/ja not_active Expired
- 1973-12-07 FR FR7343770A patent/FR2209988B1/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130169263A1 (en) * | 2011-12-16 | 2013-07-04 | Arteche Lantegi Elkartea, S.A. | High-voltage voltage divider and connector comprising said divider |
| US8963533B2 (en) * | 2011-12-16 | 2015-02-24 | Arteche Lantegi Elkartea, S.A. | High-voltage voltage divider and connector comprising said divider |
Also Published As
| Publication number | Publication date |
|---|---|
| US3819851A (en) | 1974-06-25 |
| LU68948A1 (en) | 1974-02-12 |
| IE38465L (en) | 1974-06-08 |
| FR2209988A1 (en) | 1974-07-05 |
| JPS5759607B2 (en) | 1982-12-15 |
| DE2359945A1 (en) | 1974-06-12 |
| AU6259573A (en) | 1975-05-22 |
| FR2209988B1 (en) | 1980-01-04 |
| BR7309570D0 (en) | 1974-08-29 |
| IE38465B1 (en) | 1978-03-15 |
| AR196706A1 (en) | 1974-02-12 |
| ZA738268B (en) | 1975-06-25 |
| NL7316465A (en) | 1974-06-11 |
| JPS4988095A (en) | 1974-08-22 |
| CA972044A (en) | 1975-07-29 |
| IT1004656B (en) | 1976-07-20 |
| BE808300A (en) | 1974-03-29 |
| ES420102A1 (en) | 1976-03-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |