US3911385A - Outdoor current limiting fuse - Google Patents
Outdoor current limiting fuse Download PDFInfo
- Publication number
- US3911385A US3911385A US467699A US46769974A US3911385A US 3911385 A US3911385 A US 3911385A US 467699 A US467699 A US 467699A US 46769974 A US46769974 A US 46769974A US 3911385 A US3911385 A US 3911385A
- Authority
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- United States
- Prior art keywords
- casing
- terminal means
- coating
- fuse structure
- current limiting
- 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
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 13
- 229920000877 Melamine resin Polymers 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 7
- 239000011353 cycloaliphatic epoxy resin Substances 0.000 claims description 5
- 150000008064 anhydrides Chemical class 0.000 claims description 4
- 239000000565 sealant Substances 0.000 claims description 4
- 229920002732 Polyanhydride Polymers 0.000 claims description 3
- RREGISFBPQOLTM-UHFFFAOYSA-N alumane;trihydrate Chemical compound O.O.O.[AlH3] RREGISFBPQOLTM-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 3
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 3
- 239000001095 magnesium carbonate Substances 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- 239000012260 resinous material Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 abstract description 6
- 239000003822 epoxy resin Substances 0.000 abstract description 5
- 239000000945 filler Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- MUTGBJKUEZFXGO-OLQVQODUSA-N (3as,7ar)-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione Chemical compound C1CCC[C@@H]2C(=O)OC(=O)[C@@H]21 MUTGBJKUEZFXGO-OLQVQODUSA-N 0.000 description 1
- 239000004640 Melamine resin Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000013101 initial test Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/165—Casings
Definitions
- An outdoor current limiting fuse structure is characterized by a generally tubular, electrically insulating casing having terminal means disposed at opposite ends thereof, one or more fusible elements connected between the terminal means and disposed within the casing and an epoxy resin on the exterior surface of the casing.
- the quality ofthe tube, or housing of the outdoor non-dropout current limiting fuse is significant.
- the properties of the outer surface of the tube determine whether or not the electrical insulation of the tube will be destroyed by weathering.
- the only fuses of this type currently available incorporate either glass or ceramic tubes.
- the primary disadvantage of such tubes is their brittleness. Glass or ceramic tubing is subject to damage during manufacture of the fuse, as well as in shipping and during installation.
- the inelastic nature of the tube limits the interrupting rating of the fuse since higher levels of input energy can cause the tube to crack or shatter with catastrophic results.
- the use of such tubing complicates its fabrication due to difficulty in attaching the end terminals, or ferrules, to the tube to provide an adequate weatherproof seal. Accordingly, there has been a need for an outdoor current limiting fuse structure which can be manufactured with high quality and that not only withstands the shock of interruption but also endures the the ravages of outdoor environment.
- a fuse structure comprising an electrical insulating casing or tubing comprising a glass-melamine mate-- rial, terminal means or ferrules at each end of the tubing, one or more fusible elements disposed within the tubing and connected between the terminal means, and a coating of a cycloaliphatic epoxy resin on the exterior of the surface of the tubing.
- a sealant is preferably in the joint between each ferrule and the tubing.
- the advantage of the fuse structure of this invention is primarily the glass melamine tube with the outer surface coated with a special weather-resistant epoxy resin which has been found superior to other epoxy and silicone resin systems when under electrical stress in an outdoor environment.
- FIGURE of the drawing is an elevational view partly in section of an outdoor non-dropout current limiting fuse showing the features of this invention.
- a current limiting fuse structure is generally indicated at 10 and is particularly adapted for high voltage applications, such as 15.5 KV.
- the fuse structure 10 includes a casing or tube 12, terminal end caps or electrically conducting ferrules 14 and 16, and a plurality of fusible elements l8 extending between the ferrules.
- the casing or tube '12 is formed from a suitable electrically insulating material'that has sufficient structural strength to withstand the thermal condition and internal pressures that may result during interruption of the fuse structure.
- a layer or coating 20 covers the exterior surface ofthe casing 12.
- the casing 12 is a glass-fiber reinforced melamine tube having a diameter of approximately 3 inches and a length of about 24 inches. More particularly, the glass melamine material forming the casing 12 comprises fiber glass cloth which is preliminarily dipped in a melamine resin and then wrapped upona mandrel and subsequently cured. As such the tube 20 has superior thermal,'arc, and shock resistant properties.
- the layer or coating 20 comprises an epoxy resin, a flexibilizing agent, a filler, asbestos as a thickener or thixotroping agent, and if desired, a catalyst or reaction accelerator for expediting the curing reaction.
- the epoxy resin is substantially cycloaliphatic.
- the flexibilizing agent comprises polyazelaic polyanhydride having an approximate molecular weight of 2100-2500 and hexahydrophthalic anhydride which in combination is contained in the coating at a ratio of 30-115 parts by weight per 100 parts or resin; for example, parts by weight of polyazelaic anhydride and 12 parts by weight of hexahydrophtlalic anhydride and parts cycloaliphatic epoxy resin.
- the filler comprises aluminum trihydrate or naturally occurring magnesite, which filler promotes arc'and track resistance.
- the thickner comprises asbestos of short fiber or fine grain size such as a thixotroping agent.
- the thickness of the coating 20 may vary from 3 to 20 mils with a preferred thickness of about 8 mils.
- the ferrules l4 and 16 being composed of an electrically conductive material, such as metal, serve as enclosures for the casing 12 as well as being terminal means for opposite ends of the several fusible elements 18 the ends of which are disposed between the ends of the casing 12 and the respective ferrules in a conventional manner.
- a bead 22 of sealant such as a silicone rubber compound
- Preliminary testing was conducted using the inclined plane tracking test.
- Several candidate coatings were coated on the glass reinforced melamine laminates and tested for track resistance. Also, identical pieces were first subjected to 100 hours in the weatherometer and then tested for track resistance.
- Several of these candidate materials were coated on glass melamine tubes then made into dummy fuses and tested in a standard salt-fog chamber. The voltage stress was maintained at 15.5 KV and both 0.1% and 0.05% salt solutions were used. The tests were run until tracking or leakage currents became excessive. The end point was the time required to produce three overcurrents of sufficient magnitude to blow the fuses in the high voltage circuit.
- Initial tests on the coatings for track resistance using the inclined plane test method showed wide differences in track resistance.
- the outdoor current limiting fuse structure of this invention satisfies a long existing need for a special weather-resistant fuse which is suitable for general purpose outdoor applications.
- a fuse structure comprising a generally tubular, electrically insulating casing, terminal means disposed adjacent to each of the opposite ends of said casing, a fusible element disposed within the casing and connected between said terminal means, a coating of an cycloaliphatic epoxy resin on the exterior surface of the casing and having a thickness of from about 3 to 20 mils, and the coating comprising a polyazelaic polyanhydride having an approximate molecular weight of 2100-2500 and hexa-hydrophtholic anhydride which in combination is contained in the coating at a ratio of -1 15 parts by weight per 100 parts of resin, a filler selected from a group consisting of aluminum trihydrate and magnesite, and a thixotroping agent.
- terminal means comprises a cup-shaped member fitting telescopically over each end of casing and forming an annular joint therewith, and a sealant in the joint and comprising a silicone rubber compound.
Landscapes
- Fuses (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
An outdoor current limiting fuse structure is characterized by a generally tubular, electrically insulating casing having terminal means disposed at opposite ends thereof, one or more fusible elements connected between the terminal means and disposed within the casing and an epoxy resin on the exterior surface of the casing.
Description
United States Patent 11 1 Blewitt et al.
[4 1 Oct. 7, 1975 1 OUTDOOR CURRENT LIMITING FUSE [75] Inventors: Donald D. Blewitt, Pittsburgh; Frank L. Cameron, North l-luntingdon; Charles H. Vondracek, Murrysville,
all of Pa.
[73] Assignee: Westinghouse Electric Corporation,
Pittsburgh, Pa.
[22] Filed: May 7, 1974 211 Appl. No.: 467,699
[52] U.S. Cl. 337/202; 337/186', 337/227; 337/246 [51] Int. Cl. 01H 85/02 [58] Field of Search 174/137 B, 179; 337/186, 337/202, 227, 228,246, 231
[56] References Cited UNITED STATES PATENTS 2,972,031 2/1961 Cox 337/231 X 3,511,922 5/1970 Fisch et a1 174/137 B 3,614,699 10/1971 Fister 337/281 X 3,673,305 6/1972 Mashikian et a1 174/137 B 3,701,069 10/1972 Belcher 337/231 X FOREIGN PATENTS OR APPLICATIONS 1,133,006 11/1968 United Kingdom 174/179 1,233,310 5/1971 United Kingdom.l 174/179 Primary Examiner-J. D. Miller Assistant ExaminerFred E. Bell Attorney, Agent, or FirmL. P. Johns [57] ABSTRACT An outdoor current limiting fuse structure is characterized by a generally tubular, electrically insulating casing having terminal means disposed at opposite ends thereof, one or more fusible elements connected between the terminal means and disposed within the casing and an epoxy resin on the exterior surface of the casing.
3 Claims, 1 Drawing Figure US. Patent Oct. 7,1975
OUTDOOR CURRENT LIMITING FUSE BACKGROUND OF THE INVENTION 1 their use in outdoor installations. Where a fuse .does not employ some sort of conventional dropout mechanism to physically disengage one end of the fuse from its mounting after interruption, it must be capable of withstanding full circuit voltage (after interruption) for an indefinite period against all the insulation-degrading effects of the outdoor environment. Usually, some degradation has occurred prior to the interruption and continues-to occur afterwards. I
For that reason, the quality ofthe tube, or housing of the outdoor non-dropout current limiting fuse is significant. The properties of the outer surface of the tube determine whether or not the electrical insulation of the tube will be destroyed by weathering. So far as is known, the only fuses of this type currently available incorporate either glass or ceramic tubes. The primary disadvantage of such tubes is their brittleness. Glass or ceramic tubing is subject to damage during manufacture of the fuse, as well as in shipping and during installation. Moreover, the inelastic nature of the tube limits the interrupting rating of the fuse since higher levels of input energy can cause the tube to crack or shatter with catastrophic results. Finally, the use of such tubing complicates its fabrication due to difficulty in attaching the end terminals, or ferrules, to the tube to provide an adequate weatherproof seal. Accordingly, there has been a need for an outdoor current limiting fuse structure which can be manufactured with high quality and that not only withstands the shock of interruption but also endures the the ravages of outdoor environment.
SUMMARY OF THE INVENTION It has been found in accordance with this invention that the foregoing problems may be overcome by providing a fuse structure comprising an electrical insulating casing or tubing comprising a glass-melamine mate-- rial, terminal means or ferrules at each end of the tubing, one or more fusible elements disposed within the tubing and connected between the terminal means, and a coating of a cycloaliphatic epoxy resin on the exterior of the surface of the tubing. In addition, a sealant is preferably in the joint between each ferrule and the tubing.
The advantage of the fuse structure of this invention is primarily the glass melamine tube with the outer surface coated with a special weather-resistant epoxy resin which has been found superior to other epoxy and silicone resin systems when under electrical stress in an outdoor environment.
BRIEF DESCRIPTION OF THE DRAWING The single FIGURE of the drawing is an elevational view partly in section of an outdoor non-dropout current limiting fuse showing the features of this invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT In the drawing a current limiting fuse structure is generally indicated at 10 and is particularly adapted for high voltage applications, such as 15.5 KV. The fuse structure 10 includes a casing or tube 12, terminal end caps or electrically conducting ferrules 14 and 16, and a plurality of fusible elements l8 extending between the ferrules. The casing or tube '12 is formed from a suitable electrically insulating material'that has sufficient structural strength to withstand the thermal condition and internal pressures that may result during interruption of the fuse structure. A layer or coating 20 covers the exterior surface ofthe casing 12.
The casing 12 is a glass-fiber reinforced melamine tube having a diameter of approximately 3 inches and a length of about 24 inches. More particularly, the glass melamine material forming the casing 12 comprises fiber glass cloth which is preliminarily dipped in a melamine resin and then wrapped upona mandrel and subsequently cured. As such the tube 20 has superior thermal,'arc, and shock resistant properties.
The layer or coating 20 comprises an epoxy resin, a flexibilizing agent, a filler, asbestos as a thickener or thixotroping agent, and if desired, a catalyst or reaction accelerator for expediting the curing reaction. The epoxy resin is substantially cycloaliphatic. The flexibilizing agent comprises polyazelaic polyanhydride having an approximate molecular weight of 2100-2500 and hexahydrophthalic anhydride which in combination is contained in the coating at a ratio of 30-115 parts by weight per 100 parts or resin; for example, parts by weight of polyazelaic anhydride and 12 parts by weight of hexahydrophtlalic anhydride and parts cycloaliphatic epoxy resin. The filler comprises aluminum trihydrate or naturally occurring magnesite, which filler promotes arc'and track resistance. The thickner comprises asbestos of short fiber or fine grain size such as a thixotroping agent. The thickness of the coating 20 may vary from 3 to 20 mils with a preferred thickness of about 8 mils.
The ferrules l4 and 16, being composed of an electrically conductive material, such as metal, serve as enclosures for the casing 12 as well as being terminal means for opposite ends of the several fusible elements 18 the ends of which are disposed between the ends of the casing 12 and the respective ferrules in a conventional manner.
Moreover, at the joint between the coating 20 and the ferrules 14 and 16 a bead 22 of sealant such as a silicone rubber compound, is provided.
Preliminary testing was conducted using the inclined plane tracking test. Several candidate coatings were coated on the glass reinforced melamine laminates and tested for track resistance. Also, identical pieces were first subjected to 100 hours in the weatherometer and then tested for track resistance. Several of these candidate materials were coated on glass melamine tubes then made into dummy fuses and tested in a standard salt-fog chamber. The voltage stress was maintained at 15.5 KV and both 0.1% and 0.05% salt solutions were used. The tests were run until tracking or leakage currents became excessive. The end point was the time required to produce three overcurrents of sufficient magnitude to blow the fuses in the high voltage circuit. Initial tests on the coatings for track resistance using the inclined plane test method showed wide differences in track resistance. However, this particular cycloaliphatic epoxy resin system was at least twice as good as the next best material. After exposure in the weatherometer the coating showed no loss in track resistance while all. others tested showed a 40 to 60% loss in track resistance. Results on dummy fuses tested in the saltfogchamber showed the same cycloaliphatic epoxy resinsystem to be significantly better. This system would be expected to last several months under full voltage stress after having been exposed to several years of outdoor environment.
Accordingly, the outdoor current limiting fuse structure of this invention satisfies a long existing need for a special weather-resistant fuse which is suitable for general purpose outdoor applications.
What is claimed is:
l. A fuse structure comprising a generally tubular, electrically insulating casing, terminal means disposed adjacent to each of the opposite ends of said casing, a fusible element disposed within the casing and connected between said terminal means, a coating of an cycloaliphatic epoxy resin on the exterior surface of the casing and having a thickness of from about 3 to 20 mils, and the coating comprising a polyazelaic polyanhydride having an approximate molecular weight of 2100-2500 and hexa-hydrophtholic anhydride which in combination is contained in the coating at a ratio of -1 15 parts by weight per 100 parts of resin, a filler selected from a group consisting of aluminum trihydrate and magnesite, and a thixotroping agent.
2. The fuse structure of claim 1 in which the casing comprises a glass fiber-reinforced melamine resinous material.
3. The fuse structure of claim 1 in which the terminal means comprises a cup-shaped member fitting telescopically over each end of casing and forming an annular joint therewith, and a sealant in the joint and comprising a silicone rubber compound.
Claims (3)
1. A FUSE STRUCTURE COMPRISING A GENERALLY TUBULAR, ELECTRICALLY INSULATING CASING, TERMINAL MEANS DISPOSED ADJACENT TO EACH OF THE OPPOSITE ENDS OF SAID CASING, A FUSIBLE ELEMENT DISPOSED WITHIN THE CASING AND CONNECTED BETWEEN SAID TERMINAL MEANS, A COATING OF AN CYCLOALIPHATIC EPOXY RESIN ON THE EXTERIOR SURFACE OF THE CASING AND HAVING A THICKNESS OF FROM ABOUT 3 TO 20 MILS, AND THE COATING COMPRISING A POLYAZELAIC POLYANHYDRIDE HAVING AN APPROXIMATE MOLECULAR WEIGHT OF 2100-2500 AND HEXA-HYDROPTHOLIC ANHYDRIDE WHICH IS COMBINATION IS CONTAINED IN THE COATING AT A RATION OF 30-115 PARTS BY WEIGHT PER 100 PARTS OF RESIN, A FILLER SELECTED FROM A GROUP CONSISTING OF ALUMINUM TRIHYDRATE AND MAGNESITE, AND A THIXOTROPING AGENT.
2. The fuse structure of claim 1 in which the casing comprises a glass fiber-reinforced melamine resinous material.
3. The fuse structure of claim 1 in which the terminal means comprises a cup-shaped member fitting telescopically over each end of casing and forming an annular joint therewith, and a sealant in the joint and comprising a silicone rubber compound.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US467699A US3911385A (en) | 1974-05-07 | 1974-05-07 | Outdoor current limiting fuse |
| AU79246/75A AU7924675A (en) | 1974-05-07 | 1975-03-19 | Ourdorr current limiting fuse |
| IN539/CAL/1975A IN141075B (en) | 1974-05-07 | 1975-03-19 | |
| CA222,958A CA1024560A (en) | 1974-05-07 | 1975-03-24 | Outdoor current limiting fuse |
| JP1975060744U JPS50150742U (en) | 1974-05-07 | 1975-05-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US467699A US3911385A (en) | 1974-05-07 | 1974-05-07 | Outdoor current limiting fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3911385A true US3911385A (en) | 1975-10-07 |
Family
ID=23856763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US467699A Expired - Lifetime US3911385A (en) | 1974-05-07 | 1974-05-07 | Outdoor current limiting fuse |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3911385A (en) |
| JP (1) | JPS50150742U (en) |
| AU (1) | AU7924675A (en) |
| CA (1) | CA1024560A (en) |
| IN (1) | IN141075B (en) |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979709A (en) * | 1975-05-22 | 1976-09-07 | The Chase-Shawmut Company | Electric fuse having a multiply casing of a synthetic - resin glass-cloth laminate |
| US3983525A (en) * | 1975-05-22 | 1976-09-28 | The Chase-Shawmut Company | Electric fuse and tube material adapted for use as fuse casing |
| US3984800A (en) * | 1975-05-22 | 1976-10-05 | The Chase-Shawmut Company | Electric fuse having a casing of a synthetic-resin-glass-cloth laminate including rovings |
| US3986157A (en) * | 1975-10-16 | 1976-10-12 | The Chase-Shawmut Company | Electric fuse having substantially prismatic casing |
| US3986158A (en) * | 1975-09-18 | 1976-10-12 | The Chase-Shawmut Company | Electric fuse having casing of synthetic-resin-glass-cloth laminate |
| US4208787A (en) * | 1976-12-30 | 1980-06-24 | Westinghouse Electric Corp. | Process for making a submersible fuse |
| US4274073A (en) * | 1976-12-30 | 1981-06-16 | Westinghouse Electric Corp. | Submersible fuse |
| US4282504A (en) * | 1979-09-10 | 1981-08-04 | S&C Electric Company | Fault limiter having a one-piece enclosure of glass-reinforced resin |
| US4746381A (en) * | 1986-05-05 | 1988-05-24 | A. B. Chance Company | Method of making an end cap connection for a fluid-resistance electrical device |
| US4808963A (en) * | 1987-12-24 | 1989-02-28 | Westinghouse Electric Corp. | Replaceable high current draw out fuseholder |
| US4808964A (en) * | 1987-12-24 | 1989-02-28 | Westinghouse Electric Corp. | Erosion resistant high current draw-out fuseholder |
| US4818967A (en) * | 1987-10-30 | 1989-04-04 | Cooper Power Systems, Inc. | Fused high voltage bushing |
| US20090015366A1 (en) * | 2003-11-20 | 2009-01-15 | Cooper Technologies Company | Mechanical reinforcement structure for fuses |
| US20100207716A1 (en) * | 2008-04-17 | 2010-08-19 | Chun-Chang Yen | Overcurrent protection structure and method and apparatus for making the same |
| CN103203568A (en) * | 2013-03-03 | 2013-07-17 | 石盛华 | Rapidly shrinking fusing auxiliary |
| EP3082147A1 (en) * | 2015-04-13 | 2016-10-19 | SIBA Fuses GmbH | Method for producing a securing pipe and a high-voltage fuse |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2972031A (en) * | 1959-08-31 | 1961-02-14 | Electric Transmission Ltd | Electric fuses |
| US3511922A (en) * | 1962-03-28 | 1970-05-12 | Ciba Ltd | Electrical insulator of hydrophthalic anhydride cured cycloaliphatic epoxy resins for overhead lines |
| US3614699A (en) * | 1970-08-10 | 1971-10-19 | Mc Graw Edison Co | Protector for electric circuits |
| US3673305A (en) * | 1970-11-04 | 1972-06-27 | Detroit Edison Co | Capacitively graded modular pothead for h-v cable |
| US3701069A (en) * | 1971-05-13 | 1972-10-24 | Chase Shawmut Co | Electric cartridge fuse |
-
1974
- 1974-05-07 US US467699A patent/US3911385A/en not_active Expired - Lifetime
-
1975
- 1975-03-19 IN IN539/CAL/1975A patent/IN141075B/en unknown
- 1975-03-19 AU AU79246/75A patent/AU7924675A/en not_active Expired
- 1975-03-24 CA CA222,958A patent/CA1024560A/en not_active Expired
- 1975-05-07 JP JP1975060744U patent/JPS50150742U/ja active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2972031A (en) * | 1959-08-31 | 1961-02-14 | Electric Transmission Ltd | Electric fuses |
| US3511922A (en) * | 1962-03-28 | 1970-05-12 | Ciba Ltd | Electrical insulator of hydrophthalic anhydride cured cycloaliphatic epoxy resins for overhead lines |
| US3614699A (en) * | 1970-08-10 | 1971-10-19 | Mc Graw Edison Co | Protector for electric circuits |
| US3673305A (en) * | 1970-11-04 | 1972-06-27 | Detroit Edison Co | Capacitively graded modular pothead for h-v cable |
| US3701069A (en) * | 1971-05-13 | 1972-10-24 | Chase Shawmut Co | Electric cartridge fuse |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3979709A (en) * | 1975-05-22 | 1976-09-07 | The Chase-Shawmut Company | Electric fuse having a multiply casing of a synthetic - resin glass-cloth laminate |
| US3983525A (en) * | 1975-05-22 | 1976-09-28 | The Chase-Shawmut Company | Electric fuse and tube material adapted for use as fuse casing |
| US3984800A (en) * | 1975-05-22 | 1976-10-05 | The Chase-Shawmut Company | Electric fuse having a casing of a synthetic-resin-glass-cloth laminate including rovings |
| US3986158A (en) * | 1975-09-18 | 1976-10-12 | The Chase-Shawmut Company | Electric fuse having casing of synthetic-resin-glass-cloth laminate |
| US3986157A (en) * | 1975-10-16 | 1976-10-12 | The Chase-Shawmut Company | Electric fuse having substantially prismatic casing |
| US4208787A (en) * | 1976-12-30 | 1980-06-24 | Westinghouse Electric Corp. | Process for making a submersible fuse |
| US4274073A (en) * | 1976-12-30 | 1981-06-16 | Westinghouse Electric Corp. | Submersible fuse |
| US4282504A (en) * | 1979-09-10 | 1981-08-04 | S&C Electric Company | Fault limiter having a one-piece enclosure of glass-reinforced resin |
| US4746381A (en) * | 1986-05-05 | 1988-05-24 | A. B. Chance Company | Method of making an end cap connection for a fluid-resistance electrical device |
| US4818967A (en) * | 1987-10-30 | 1989-04-04 | Cooper Power Systems, Inc. | Fused high voltage bushing |
| US4808963A (en) * | 1987-12-24 | 1989-02-28 | Westinghouse Electric Corp. | Replaceable high current draw out fuseholder |
| US4808964A (en) * | 1987-12-24 | 1989-02-28 | Westinghouse Electric Corp. | Erosion resistant high current draw-out fuseholder |
| US20090015366A1 (en) * | 2003-11-20 | 2009-01-15 | Cooper Technologies Company | Mechanical reinforcement structure for fuses |
| US20100207716A1 (en) * | 2008-04-17 | 2010-08-19 | Chun-Chang Yen | Overcurrent protection structure and method and apparatus for making the same |
| US8179224B2 (en) * | 2008-04-17 | 2012-05-15 | Chun-Chang Yen | Overcurrent protection structure and method and apparatus for making the same |
| CN103203568A (en) * | 2013-03-03 | 2013-07-17 | 石盛华 | Rapidly shrinking fusing auxiliary |
| EP3082147A1 (en) * | 2015-04-13 | 2016-10-19 | SIBA Fuses GmbH | Method for producing a securing pipe and a high-voltage fuse |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS50150742U (en) | 1975-12-15 |
| IN141075B (en) | 1977-01-15 |
| CA1024560A (en) | 1978-01-17 |
| AU7924675A (en) | 1976-09-23 |
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