US3793603A - Fuse cartridges - Google Patents
Fuse cartridges Download PDFInfo
- Publication number
- US3793603A US3793603A US00272160A US3793603DA US3793603A US 3793603 A US3793603 A US 3793603A US 00272160 A US00272160 A US 00272160A US 3793603D A US3793603D A US 3793603DA US 3793603 A US3793603 A US 3793603A
- Authority
- US
- United States
- Prior art keywords
- tube
- mandrel
- coiled
- cartridge
- synthetic resin
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000004804 winding Methods 0.000 claims abstract description 14
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 13
- 239000000057 synthetic resin Substances 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims description 23
- 239000004753 textile Substances 0.000 claims description 13
- 239000000835 fiber Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 7
- 239000011810 insulating material Substances 0.000 abstract description 5
- 229920005989 resin Polymers 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 4
- 239000012809 cooling fluid Substances 0.000 abstract description 2
- 229920002994 synthetic fiber Polymers 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 239000006004 Quartz sand Substances 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- ZHNFLHYOFXQIOW-AHSOWCEXSA-N (s)-[(2r,4s,5r)-5-ethenyl-1-azabicyclo[2.2.2]octan-2-yl]-(6-methoxyquinolin-4-yl)methanol;sulfuric acid;dihydrate Chemical compound O.O.OS(O)(=O)=O.C([C@H]([C@H](C1)C=C)C2)CN1[C@H]2[C@@H](O)C1=CC=NC2=CC=C(OC)C=C21.C([C@H]([C@H](C1)C=C)C2)CN1[C@H]2[C@@H](O)C1=CC=NC2=CC=C(OC)C=C21 ZHNFLHYOFXQIOW-AHSOWCEXSA-N 0.000 description 1
- 235000007319 Avena orientalis Nutrition 0.000 description 1
- 241000209763 Avena sativa Species 0.000 description 1
- 235000007558 Avena sp Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H01H85/47—Means for cooling
Definitions
- the tube is preferably of non- [51 I Int. Cl. H0lh 85/04 metallic nature and it is coiled helically about the axis [5 F eld Of 5, 163; l6 of the body.
- the tubular 174/ 15 R mass is obtained by winding on a mandrel glass threads or ribbons impregnated with a uncured syn- [5'6] References C ted thetic resin so as to form an inner layer on which the UNITED STATES PATENTS cooling tube may be coiled, then an intermediate layer 3,453,579 7 1969 Cinquin 337/166 ux which fills the helical Space which separates the 3,678,431 7/1972 Franklin 337/185 cessive turns the coiled tube and an outer layer 3,713,065 1 1973 Brichant..
- These'cartridges comprise a generally tubular insulating body whose ends are closed by metallic heads which carry the contact members of the cartridge, these heads being connected with each other within the cartridge body by fusible elements (wires or strips) embedded in a mass of arc-quenching material (generally quartz sand).
- the fusible elements melt or volatilize and the are which appears between the heads is rapidly quenched by the sand or like material. But this are creates a sudden gaseous overpressure or pressure wave which is applied to the insulating body. The latter should therefore have a relatively high mechanical strength to withstand this bursting action.
- the cartridge body should also evacuate the heat generated by the electric current in the fusible elements. Since the latter should melt under the action of an excessive current, it is unavoidable that under normal conditions they cause a slight voltage drop which is transformed into heat. This heat is'in part transferred to the arc-quenching material and therefrom to the cartridge body. Owing to the thermic conductivityof the fusible elements a noticeable portion of the heat thus generated is also transferred to the said body through the metallic heads of the cartridge.
- a hollow body for a liquid cooled electrical fuse cartridge comprises a cooling tube embedded in a tubular mass of an insulating material.
- the cooling tube which is conveniently made of a plastic or synthetic material, is coiled helically co-axially to the cartridge body, the tubular mass in which it is embedded being formed of a hardened synthetic resin re-inforced by a fibrous material with fibres extending substantially circularly about the aforesaid axis.
- the fibrous material used comprises preferably glass fibres.
- the invention further concerns a process for the manufacture of acartridge body by winding on a mandrel three layers of a textile material with longitudinallyextending fibres, impregnated with a synthetic resin in the non-hardened state, namely an inner layer on which the cooling tube is coiled, an intermediate layer which 7 fills the spaces between the successive turns of the helically coiled cooling tube, and an outer layer which covers the said tube, the mass thus obtained being thereafter treated so as to harden the synthetic resin and to obtain a one-piece rigid hollow body in which the cooling tube isembedded.
- FIG. 1 is a side view with fragmental section of a fuse cartridge comprising an insulating body according to the invention.
- FIG. 2 is a transverse section thereof.
- FIG. 3 is a fragmental longitudinal section of a cartridge body according to the invention obtained by winding appropriately impregnated glass threads or ribbons.
- the cartridge illustrated in FIGS. 1 and 2 comprises a tubular insulating body 1 the ends of which are closed by two metallic heads 2, each being in one with a contact blade 3. These heads 2 are secured to the body 1 by any appropriate means not shown. They may be formed for this purpose with an inner portion of reduced diameter which fits into the corresponding end of body 1. Heads 2 are electrically connected with each other by means of a fusible strip 4 which is pleated in accordion fashion within body 1, this strip being embedded in a mass 5 of an appropriate arc-quenching material, such as for instance quartz sand.
- an appropriate arc-quenching material such as for instance quartz sand.
- the cartridge body 1 has a more or less elliptical transvers profile and strip 4 is so arranged that the ends of its successive folds may come into contact with the inner surface of the said body.
- Such an arrangement reduces to a minimum the average thickness of the material 5 which separates the strip from the body wall and enhances heat'transfer between the strip and the said body.
- the cartridge body 1 includes a coiled tube 6 which is embedded in the thickness of the wall thereof, this tube having outwardly extending ends 7 and 8 through which it may be connected with an appropriate system of cooling liquid.
- Tube 6 may be made of metal, more particularly in the case of low voltage circuits, but it seems preferable to use a tube made of an appropriate plastic or synthetic material in order to avoid the presence of an electrically conductive member which may cause superficial electrical leaks or facilitate the formation of an outer are between the cartridge heads under the action of the voltage surge which generally appears when the fusible element melts under a heavy current.
- the cartridge body may be made of any insulating 'material capable of being moulded or otherwise disposed around the coiled tube. It may more particularly be realized in an appropriate plastic or synthetic material by injection moulding within a mould provided with means for retaining the coiled tube at the proper position in the moulding cavity. In such a case, if the tube is itself made of a plastic or synthetic material, the latter should of course be of such a'nature as to withstand the injection temperature without being damaged, which may be difficult in some cases. Furthermore a hollow body made of an injected material does not generally possess a very high mechanical strength against bursting. ltseems therefore preferable to realize body 1 in the following manner:
- Threads or ribbons of an appropriate material under fibrous form, preferably glass, are then would on this mandrel while being impregnated with a thermosettable synthetic resin in the unhardened state until there is obtained a layer having a thickness a (FIG. 3) equal to the distance desired between the coiled cooling tube and the inner surface of the cartridge body.
- the cooling tube 6 is then wound on this first layer. If required the tube may be heated at such a temperature that it may be sufficiently deformable for the winding operation. Also care must be taken that it should not flatten, as this is well known in the art.
- the coiled tube thus realized is then maintained on the mandrel and appropriately impregnated strips of glass threads or ribbons are wound in the helical spaces which separate the successive turns of the tube until the said spaces are wholly filled, which corresponds to the thickness b in FIG. 3. Finally an outer layer of impregnated glass threads or ribbons is wound on the smooth cylindrical surface thus realized so as to form an outer layer having the thickness c which is desired for the insulating material covering the coiled tube.
- this body may be cooled in a region close to its inner surface, i. e., with a much lower temperature gradient than by means of the known outer cooling plates. If the cooling tube is made of a plastic or synthetic material,
- the cartridge body comprises no electrically conduct- .ing part which could lead to the formation of an arc when the fusible element volatilizes under the action of an excessive current or of a short-circuit.
- the cooling tube could be coiled in zig-zag formationincluding straight portions parallel to the cartridge axis and connected with each other in V series by semi-circular portions.
- the cooling system could comprise a number of longitudinal tubes connected in parallel between two headers.
- the spaces between the coils or sections'can no more be filled by winding threads or ribbons of a fibrous material such as glass, and it is therefore necessary to provide a moulding operation at least'for the thickness b of FIG. 3.
- one at least of said first, second and third textile materials comprising glass fibers.
Landscapes
- Moulding By Coating Moulds (AREA)
Abstract
In an electrical fuse cartridge having a hollow insulating body enclosing the fusible element or elements and carrying the terminal heads of the cartridge, the said body is formed of a tubular mass of an insulating material in which a tube is embedded for circulation of a cooling fluid. The tube is preferably of non-metallic nature and it is coiled helically about the axis of the body. In a preferred embodiment the tubular mass is obtained by winding on a mandrel glass threads or ribbons impregnated with a uncured synthetic resin so as to form an inner layer on which the cooling tube may be coiled, then an intermediate layer which fills the helical space which separates the successive turns of the coiled tube, and an outer layer covering the intermediate layer and the tube, the unit thus obtained being thereafter treated to cure the resin in the three layers and to thus obtain a rigid one-piece body with the cooling tube embedded therein.
Description
United States Patent 1191 Fontaine Feb. 19, 1974 FUSE CARTRIDGES Primary Examiner-Gilheany Bernard A.
Assistant ExaminerF. E. Belli [75] Inventor' jg g Fontaine Eculny Attorney, Agent, or Firm-Alexander & Dowel] [73] Assignee: Societe Lucien Ferraz & Cie, [57] ABSTRACT Lyon/Rhone France In an electrical fuse cartridge having a hollow insulat- [22] Filed: July 17, 1972 ing body enclosing the fusible element or elements I and carrying the terminal heads of the cartridge, the 1 Appl' 272l60 said body is formed of a tubular mass of an insulating material in which a tube is embedded for circulation I52] U.S. Cl. 337/166, 174/15 R, 337/185 of a cooling fluid. The tube is preferably of non- [51 I Int. Cl. H0lh 85/04 metallic nature and it is coiled helically about the axis [5 F eld Of 5, 163; l6 of the body. In a preferred embodiment the tubular 174/ 15 R mass is obtained by winding on a mandrel glass threads or ribbons impregnated with a uncured syn- [5'6] References C ted thetic resin so as to form an inner layer on which the UNITED STATES PATENTS cooling tube may be coiled, then an intermediate layer 3,453,579 7 1969 Cinquin 337/166 ux which fills the helical Space which separates the 3,678,431 7/1972 Franklin 337/185 cessive turns the coiled tube and an outer layer 3,713,065 1 1973 Brichant.. 337 166 covering the intermediate layer and the tube, the unit 3,715,698 2/1973 Blewitt 337/185 thus obtained being thereafter treated to cure the 3,693,71 1 9/1972 Zygiel 165/164 resin in the three layers and to thus obtain a rigid one- 3,586,9l7 6/1971 Oates l74/l5 R piece body with thg COQIiEg tube embedded therein 2 Claims, 3 Drawing Figures FUSE CARTRIDGES The present invention relates to fuse cartridges which are used as protecting means against excessive currents and shortcircuits.
' These'cartridges comprise a generally tubular insulating body whose ends are closed by metallic heads which carry the contact members of the cartridge, these heads being connected with each other within the cartridge body by fusible elements (wires or strips) embedded in a mass of arc-quenching material (generally quartz sand).
Under the action of an excessive current or shortcircuit the fusible elements melt or volatilize and the are which appears between the heads is rapidly quenched by the sand or like material. But this are creates a sudden gaseous overpressure or pressure wave which is applied to the insulating body. The latter should therefore have a relatively high mechanical strength to withstand this bursting action. 'j The cartridge body should also evacuate the heat generated by the electric current in the fusible elements. Since the latter should melt under the action of an excessive current, it is unavoidable that under normal conditions they cause a slight voltage drop which is transformed into heat. This heat is'in part transferred to the arc-quenching material and therefrom to the cartridge body. Owing to the thermic conductivityof the fusible elements a noticeable portion of the heat thus generated is also transferred to the said body through the metallic heads of the cartridge.
lt has been proposed to cool the body of a fuse cartridge by means of an appropriate liquid (oil, demineralized water, etc...). For this purpose the cartridge body may be realized under flat form, liquid cooled metallic plates being applied against its sides. But of course such an arrangement is only effective for the outer surface ofthe body and since due to the required mechanical strength the latter should be relatively thick while being madeof an insulating material of low thermal conductivity the temperature gradient across the body wall is relatively important and limits the cooling possibilities. It has further been suggested to cool a fuse cartridge through its heads, but this is only effective in the case of cartridges of'short length.
It is an object of the present invention to avoid the above-mentioned limitations and to provide a liquid cooled fuse cartridge having an insulating body of high mechanical strength with a high heat dissipating capacity.
In accordance with the present invention a hollow body for a liquid cooled electrical fuse cartridge comprises a cooling tube embedded in a tubular mass of an insulating material.
In 'a preferredembodiment the cooling tube, which is conveniently made of a plastic or synthetic material, is coiled helically co-axially to the cartridge body, the tubular mass in which it is embedded being formed of a hardened synthetic resin re-inforced by a fibrous material with fibres extending substantially circularly about the aforesaid axis. The fibrous material used comprises preferably glass fibres.
The invention further concerns a process for the manufacture of acartridge body by winding on a mandrel three layers of a textile material with longitudinallyextending fibres, impregnated with a synthetic resin in the non-hardened state, namely an inner layer on which the cooling tube is coiled, an intermediate layer which 7 fills the spaces between the successive turns of the helically coiled cooling tube, and an outer layer which covers the said tube, the mass thus obtained being thereafter treated so as to harden the synthetic resin and to obtain a one-piece rigid hollow body in which the cooling tube isembedded.
In the annexed drawings:
FIG. 1 is a side view with fragmental section of a fuse cartridge comprising an insulating body according to the invention.
FIG. 2 is a transverse section thereof.
FIG. 3 is a fragmental longitudinal section of a cartridge body according to the invention obtained by winding appropriately impregnated glass threads or ribbons.
. The cartridge illustrated in FIGS. 1 and 2 comprises a tubular insulating body 1 the ends of which are closed by two metallic heads 2, each being in one with a contact blade 3. These heads 2 are secured to the body 1 by any appropriate means not shown. They may be formed for this purpose with an inner portion of reduced diameter which fits into the corresponding end of body 1. Heads 2 are electrically connected with each other by means of a fusible strip 4 which is pleated in accordion fashion within body 1, this strip being embedded in a mass 5 of an appropriate arc-quenching material, such as for instance quartz sand.
In the embodiment illustrated the cartridge body 1 has a more or less elliptical transvers profile and strip 4 is so arranged that the ends of its successive folds may come into contact with the inner surface of the said body. Such an arrangement reduces to a minimum the average thickness of the material 5 which separates the strip from the body wall and enhances heat'transfer between the strip and the said body.
As above indicated the cartridge body 1 includes a coiled tube 6 which is embedded in the thickness of the wall thereof, this tube having outwardly extending ends 7 and 8 through which it may be connected with an appropriate system of cooling liquid. Tube 6 may be made of metal, more particularly in the case of low voltage circuits, but it seems preferable to use a tube made of an appropriate plastic or synthetic material in order to avoid the presence of an electrically conductive member which may cause superficial electrical leaks or facilitate the formation of an outer are between the cartridge heads under the action of the voltage surge which generally appears when the fusible element melts under a heavy current.
The cartridge body may be made of any insulating 'material capable of being moulded or otherwise disposed around the coiled tube. It may more particularly be realized in an appropriate plastic or synthetic material by injection moulding within a mould provided with means for retaining the coiled tube at the proper position in the moulding cavity. In such a case, if the tube is itself made of a plastic or synthetic material, the latter should of course be of such a'nature as to withstand the injection temperature without being damaged, which may be difficult in some cases. Furthermore a hollow body made of an injected material does not generally possess a very high mechanical strength against bursting. ltseems therefore preferable to realize body 1 in the following manner:
There is first prepared a mandrel having the dimensions desired for the inside of the said body. Threads or ribbons of an appropriate material under fibrous form, preferably glass, are then would on this mandrel while being impregnated with a thermosettable synthetic resin in the unhardened state until there is obtained a layer having a thickness a (FIG. 3) equal to the distance desired between the coiled cooling tube and the inner surface of the cartridge body. The cooling tube 6 is then wound on this first layer. If required the tube may be heated at such a temperature that it may be sufficiently deformable for the winding operation. Also care must be taken that it should not flatten, as this is well known in the art. The coiled tube thus realized is then maintained on the mandrel and appropriately impregnated strips of glass threads or ribbons are wound in the helical spaces which separate the successive turns of the tube until the said spaces are wholly filled, which corresponds to the thickness b in FIG. 3. Finally an outer layer of impregnated glass threads or ribbons is wound on the smooth cylindrical surface thus realized so as to form an outer layer having the thickness c which is desired for the insulating material covering the coiled tube.
After treatment of the resin and removal of the mandrel, there is thus obtained a one-piece tubular body of considerable mechanical strength against inner pressure waves and in which the coiled cooling tube is wholly embedded.
Whatever may be the method used for the manufacture of the cartridge bod'y according to the invention, this body may be cooled in a region close to its inner surface, i. e., with a much lower temperature gradient than by means of the known outer cooling plates. If the cooling tube is made of a plastic or synthetic material,
the cartridge body comprises no electrically conduct- .ing part which could lead to the formation of an arc when the fusible element volatilizes under the action of an excessive current or of a short-circuit.
It is to be noted that the cooling tube could be coiled in zig-zag formationincluding straight portions parallel to the cartridge axis and connected with each other in V series by semi-circular portions. In some cases the cooling system could comprise a number of longitudinal tubes connected in parallel between two headers. Of course with non-helical formations the spaces between the coils or sections'can no more be filled by winding threads or ribbons of a fibrous material such as glass, and it is therefore necessary to provide a moulding operation at least'for the thickness b of FIG. 3.
I claim:
1. A process for the manufacture ofa cartridge body,
comprising the following steps:
a. winding on a mandrel a first textile material with longitudinally extending fibers to form an inner layer on said mandrel, said first material being impregnated with an uncured synthetic resin;
b. winding helically a cooling tube on said inner layer with the successive turns being separated from each other by a helical intermediate space;
c. winding helically on said inner layer and in said helical intermediate space a second textile material with longitudinally extending fibers to form a helical intermediate layer which completely fills said space and realizes on said mandrel a substantially smooth peripheral surface, said second textile material being impregnated with an uncured synthetic resin;
d. winding on said smooth surface a third textile material with longitudinally extending fibers, to form an outer layer which covers said intermediatelayer and said tube, said third textile material being impregnated with an uncured synthetic resin;
e. treating the tubular mass thus obtained on said mandrel to cure the synthetic resin in said'inner, intermediate and outer layers and to thus form a one-piece rigid hollow body.
2. In a process as claimed in claim 1, one at least of said first, second and third textile materials comprising glass fibers.
Claims (2)
1. A process for the manufacture of a cartridge body, comprising the following steps: a. winding on a mandrel a first textile material with longitudinally extending fibers to form an inner layer on said mandrel, said first material being impregnated with an uncured synthetic resin; b. winding helically a cooling tube on said inner layer with the successive turns being separated from each other by a helical intermediate space; c. winding helically on said inner layer and in said helical intermediate space a second textile material with longitudinally extending fibers to form a helical intermediate layer which completely fills said space and realizes on said mandrel a substantially smooth peripheral surface, said second textile material being impregnated with an uncured synthetic resin; d. winding on said smooth surface a third textile material with longitudinally extending fibers, to form an outer layer which covers said intermediate layer and said tube, said third textile material being impregnated with an uncured synthetic resin; e. treating the tubular mass thus obtained on said mandrel to cure the synthetic resin in said inner, intermediate and Outer layers and to thus form a one-piece rigid hollow body.
2. In a process as claimed in claim 1, one at least of said first, second and third textile materials comprising glass fibers.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27216072A | 1972-07-17 | 1972-07-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3793603A true US3793603A (en) | 1974-02-19 |
Family
ID=23038669
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00272160A Expired - Lifetime US3793603A (en) | 1972-07-17 | 1972-07-17 | Fuse cartridges |
Country Status (1)
Country | Link |
---|---|
US (1) | US3793603A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4172243A (en) * | 1977-06-10 | 1979-10-23 | Westinghouse Electric Corp. | Transformer with a liquid cooled case and a method for making the liquid cooled case |
US4189695A (en) * | 1976-10-08 | 1980-02-19 | Hinode Electric Machine Co., Ltd. | Current limiting fuse device employing cooling and insulating medium |
FR2759243A1 (en) * | 1997-02-03 | 1998-08-07 | Ferraz | HEAT EXCHANGER FOR ELECTRONIC COMPONENTS AND ELECTROTECHNICAL APPARATUS |
US6801433B2 (en) * | 2001-04-19 | 2004-10-05 | General Electric Company | Method and apparatus for cooling electrical fuses |
US6840308B2 (en) | 2002-05-31 | 2005-01-11 | General Electric Co. | Heat sink assembly |
WO2012025853A1 (en) | 2010-08-23 | 2012-03-01 | Brusa Elektronik Ag | Electrical fuse |
WO2018069141A1 (en) * | 2016-10-14 | 2018-04-19 | Continental Automotive Gmbh | Circuit arrangement comprising a fuse, motor vehicle, and method for manufacturing said circuit arrangement |
DE102022102868A1 (en) | 2022-02-08 | 2023-08-10 | Man Truck & Bus Se | Cooling device for fluid cooling of a passive residual current device |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3453579A (en) * | 1966-07-29 | 1969-07-01 | Ferraz & Cie Lucien | Fuse cartridge |
US3586917A (en) * | 1969-12-11 | 1971-06-22 | Rca Corp | Semiconductor hybrid power module package |
US3678431A (en) * | 1969-09-17 | 1972-07-18 | Leroy H Franklin | High power fuse |
US3693711A (en) * | 1971-03-08 | 1972-09-26 | Alfred E Zygiel | Monolithic cast body heat exchanger |
US3713065A (en) * | 1970-06-12 | 1973-01-23 | Ferraz & Cie Lucien | Fast-acting electrical fuse |
US3715698A (en) * | 1971-02-16 | 1973-02-06 | Westinghouse Electric Corp | Current limiting fuse |
-
1972
- 1972-07-17 US US00272160A patent/US3793603A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3453579A (en) * | 1966-07-29 | 1969-07-01 | Ferraz & Cie Lucien | Fuse cartridge |
US3678431A (en) * | 1969-09-17 | 1972-07-18 | Leroy H Franklin | High power fuse |
US3586917A (en) * | 1969-12-11 | 1971-06-22 | Rca Corp | Semiconductor hybrid power module package |
US3713065A (en) * | 1970-06-12 | 1973-01-23 | Ferraz & Cie Lucien | Fast-acting electrical fuse |
US3715698A (en) * | 1971-02-16 | 1973-02-06 | Westinghouse Electric Corp | Current limiting fuse |
US3693711A (en) * | 1971-03-08 | 1972-09-26 | Alfred E Zygiel | Monolithic cast body heat exchanger |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4189695A (en) * | 1976-10-08 | 1980-02-19 | Hinode Electric Machine Co., Ltd. | Current limiting fuse device employing cooling and insulating medium |
US4172243A (en) * | 1977-06-10 | 1979-10-23 | Westinghouse Electric Corp. | Transformer with a liquid cooled case and a method for making the liquid cooled case |
FR2759243A1 (en) * | 1997-02-03 | 1998-08-07 | Ferraz | HEAT EXCHANGER FOR ELECTRONIC COMPONENTS AND ELECTROTECHNICAL APPARATUS |
EP0858107A1 (en) * | 1997-02-03 | 1998-08-12 | Ferraz | Heat exchanger for electronic components and electrotechnical apparatusses |
US5973261A (en) * | 1997-02-03 | 1999-10-26 | Ferraz A French Societe Anonyme | Heat exchanger for electronic components and electrotechnical equipment |
US6801433B2 (en) * | 2001-04-19 | 2004-10-05 | General Electric Company | Method and apparatus for cooling electrical fuses |
US6840308B2 (en) | 2002-05-31 | 2005-01-11 | General Electric Co. | Heat sink assembly |
WO2012025853A1 (en) | 2010-08-23 | 2012-03-01 | Brusa Elektronik Ag | Electrical fuse |
WO2018069141A1 (en) * | 2016-10-14 | 2018-04-19 | Continental Automotive Gmbh | Circuit arrangement comprising a fuse, motor vehicle, and method for manufacturing said circuit arrangement |
CN109791861A (en) * | 2016-10-14 | 2019-05-21 | 大陆汽车有限公司 | The method of circuit arrangement, motor vehicles and the manufacture circuit arrangement including fuse |
US10593504B2 (en) | 2016-10-14 | 2020-03-17 | Continental Automotive Gmbh | Circuit arrangement |
CN109791861B (en) * | 2016-10-14 | 2020-08-11 | 大陆汽车有限公司 | Circuit arrangement comprising a fuse, motor vehicle and method for producing said circuit arrangement |
DE102022102868A1 (en) | 2022-02-08 | 2023-08-10 | Man Truck & Bus Se | Cooling device for fluid cooling of a passive residual current device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3793603A (en) | Fuse cartridges | |
KR100391037B1 (en) | Polymeric resistance heating element | |
US4890380A (en) | Method of manufacturing a fuse with an envelope of non-porous rigid ceramic | |
US3191005A (en) | Electric circuit arrangement | |
US2830156A (en) | Shock and vibration resistant fuse | |
US6368530B1 (en) | Method of forming cooling ducts in cast resin coils | |
BE1014634A3 (en) | ||
US2929900A (en) | Fuse cartridge | |
BRPI0215491B1 (en) | high strength straight tube, resin encapsulated transformer coil and method of manufacturing a resin encapsulated transformer coil | |
JPS5842955B2 (en) | Heating element with positive temperature coefficient resistor | |
US4401841A (en) | Explosion resistant insulator and method of making same | |
US6642833B2 (en) | High-voltage current-limiting fuse | |
US3801945A (en) | Quick acting high voltage fuse | |
US3585468A (en) | Thermoplastic jacketed thermoplastic capacitor | |
US3925745A (en) | High voltage fuse with localized gas evolving suppressors | |
US5670926A (en) | High-voltage fuse having a core of bound silica sand about which fusible elements are wound | |
US3715698A (en) | Current limiting fuse | |
US4099153A (en) | Gas evolving clamp for current limiting fuse | |
US3156801A (en) | Current limiting fuse unit with casing sealing its terminals | |
US2382271A (en) | Current limiting fuse | |
US3740687A (en) | Current limiting fuse | |
US3755769A (en) | Modularized fuse with precise gap | |
US2087736A (en) | Resistor construction | |
JPH1092625A (en) | Electronic part | |
US3447240A (en) | Method of making a fuse with a sand core |