US3798351A - Electric insulators having non-corona and anti-pollution properties - Google Patents
Electric insulators having non-corona and anti-pollution properties Download PDFInfo
- Publication number
- US3798351A US3798351A US00300574A US3798351DA US3798351A US 3798351 A US3798351 A US 3798351A US 00300574 A US00300574 A US 00300574A US 3798351D A US3798351D A US 3798351DA US 3798351 A US3798351 A US 3798351A
- Authority
- US
- United States
- Prior art keywords
- insulator
- cement
- electric
- semi
- low melting
- 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 - Lifetime
Links
- 239000012212 insulator Substances 0.000 title claims description 35
- 239000002184 metal Substances 0.000 claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 claims abstract description 63
- 239000004568 cement Substances 0.000 claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 27
- 239000000956 alloy Substances 0.000 claims abstract description 27
- 229910052573 porcelain Inorganic materials 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 20
- 239000003989 dielectric material Substances 0.000 claims abstract description 20
- 238000002844 melting Methods 0.000 claims abstract description 19
- 230000008018 melting Effects 0.000 claims abstract description 19
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003973 paint Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000002847 sound insulator Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
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
Definitions
- the present invention relates to electric insulators, and more particularly, to an improvement in an electric insulator which comprises porcelain coated at its exposed surface with a semi-conducting glaze and by which excellent non-corona discharge property and pollution resistant property can be maintained for a long period of time.
- insulating paint has hitherto been applied to the surface of the metallic film and its peripheral portion.
- any kind of insulating paint is insufficient in weather resistance, water is easily penetrated into the paint, and a local battery action occurs to make the passage between the metal fittingand the semi-conducting glaze less conductive in a very short period of time.
- the cap and pin type electric insulator of the present invention which may be of any other type, comprises a porcelain body 1, which is composed of a head 2 and a skirt 3 and coated at its exposed surface with a semi-conducting glaze 4 described, for example, in the specification of US. Pat. No. 3,658,583, an upper metal fitting 7 fixed to the outer periphery of the head 2 by means of cement 5, a
- the metal fittings 7 and 8 are insulated from the low melting point alloy portions 9 and respectively by merely isolating the metal fittings from the alloy portions at a prolonged surface leakage distance.
- the insulating method is not limited to the above method.
- the metal fittings 7 and 8 or the low melting point alloy portions 9 and 10, or both of them may be applied with an insulating paint or subjected to a surface insulating treatment, or insulating mediums may be interposed between the metal fittings ,7, 8 and the alloy portions 9, 10 respectively, in order that the metal fitting and the alloy portion are contacted through these insulating materials.
- the embodiment shown in the FIGURE is a cap and pin type electric insulator.
- any types of electric insulators included in the above described definition may be used in the present invention regardless of the type.
- the electric insulator of the present invention both of the conductive current and circulating current due tov local battery action do not flow through cement regardless of its type, and a non-corona property considerably superior to that of the above described conventional electric insulators can be maintained for a long period of time.
- insulator as claimed in claim 1, wherein said insulator is of an insulator whose porcelain body is prooflow meltmg pomt alloy portions whlch encu' vided at its total exposed surface with said semicle the body, respective portions of which being in conducting glaze.
Landscapes
- Insulators (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP46086280A JPS5024147B2 (enrdf_load_stackoverflow) | 1971-11-01 | 1971-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3798351A true US3798351A (en) | 1974-03-19 |
Family
ID=13882401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00300574A Expired - Lifetime US3798351A (en) | 1971-11-01 | 1972-10-25 | Electric insulators having non-corona and anti-pollution properties |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3798351A (enrdf_load_stackoverflow) |
| JP (1) | JPS5024147B2 (enrdf_load_stackoverflow) |
| CA (1) | CA983595A (enrdf_load_stackoverflow) |
| FR (1) | FR2158421B1 (enrdf_load_stackoverflow) |
| GB (1) | GB1394693A (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6265669B1 (en) * | 1996-08-12 | 2001-07-24 | Clyde N. Richards | Semiconductive attachment disc for insulators to reduce electrical stress-induced corrosion |
| US6613985B2 (en) * | 2000-08-28 | 2003-09-02 | Ngk Insulators, Ltd. | Suspension insulator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0799653B2 (ja) * | 1987-02-04 | 1995-10-25 | 日本碍子株式会社 | 懸垂碍子 |
| JPH0727742B2 (ja) * | 1989-03-20 | 1995-03-29 | 日本碍子株式会社 | 碍子用キャップ金具の亜鉛カラー形成方法及びその成形型 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE647313C (de) * | 1933-07-27 | 1937-07-01 | Siemens Schuckertwerke Akt Ges | Isolator fuer mit Gleichstrom betriebene Hochspannungsanlagen |
| GB586065A (en) * | 1945-05-21 | 1947-03-05 | Taylor Tunnicliff And Company | Improvements in electric insulators |
| US3658583A (en) * | 1969-10-11 | 1972-04-25 | Ngk Insulators Ltd | Method for producing semi-conducting glaze compositions for electric insulators |
-
1971
- 1971-11-01 JP JP46086280A patent/JPS5024147B2/ja not_active Expired
-
1972
- 1972-10-25 US US00300574A patent/US3798351A/en not_active Expired - Lifetime
- 1972-10-26 GB GB4944272A patent/GB1394693A/en not_active Expired
- 1972-10-31 FR FR7238664A patent/FR2158421B1/fr not_active Expired
- 1972-10-31 CA CA155,299A patent/CA983595A/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE647313C (de) * | 1933-07-27 | 1937-07-01 | Siemens Schuckertwerke Akt Ges | Isolator fuer mit Gleichstrom betriebene Hochspannungsanlagen |
| GB586065A (en) * | 1945-05-21 | 1947-03-05 | Taylor Tunnicliff And Company | Improvements in electric insulators |
| US3658583A (en) * | 1969-10-11 | 1972-04-25 | Ngk Insulators Ltd | Method for producing semi-conducting glaze compositions for electric insulators |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6265669B1 (en) * | 1996-08-12 | 2001-07-24 | Clyde N. Richards | Semiconductive attachment disc for insulators to reduce electrical stress-induced corrosion |
| US6613985B2 (en) * | 2000-08-28 | 2003-09-02 | Ngk Insulators, Ltd. | Suspension insulator |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1394693A (en) | 1975-05-21 |
| JPS4851287A (enrdf_load_stackoverflow) | 1973-07-18 |
| FR2158421A1 (enrdf_load_stackoverflow) | 1973-06-15 |
| JPS5024147B2 (enrdf_load_stackoverflow) | 1975-08-13 |
| FR2158421B1 (enrdf_load_stackoverflow) | 1980-04-18 |
| CA983595A (en) | 1976-02-10 |
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