CH392671A - Method of manufacturing a fuse cartridge - Google Patents
Method of manufacturing a fuse cartridgeInfo
- Publication number
- CH392671A CH392671A CH45361A CH45361A CH392671A CH 392671 A CH392671 A CH 392671A CH 45361 A CH45361 A CH 45361A CH 45361 A CH45361 A CH 45361A CH 392671 A CH392671 A CH 392671A
- Authority
- CH
- Switzerland
- Prior art keywords
- binders
- arc
- fuse
- manufacturing
- production
- Prior art date
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000011230 binding agent Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229920000877 Melamine resin Polymers 0.000 claims description 2
- 229920002050 silicone resin Polymers 0.000 claims description 2
- 239000004640 Melamine resin Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000011132 calcium sulphate Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
-
- 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
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/044—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified
- H01H85/045—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type
- H01H85/0456—General constructions or structure of low voltage fuses, i.e. below 1000 V, or of fuses where the applicable voltage is not specified cartridge type with knife-blade end contacts
-
- 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
- H01H85/18—Casing fillings, e.g. powder
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49107—Fuse making
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Description
Zusatzpatent zum Hauptpatent Nr. 381312 Verfahren zur Herstellung einer Sicherungspatrone Im Hauptpatent ist eine Sicherungspatrone be schrieben, deren Gehäuse einstückig als geschlosse ner Hohlkörper durch Giessen aus Kunstharz her gestellt ist, sowie ein Verfahren zu ihrer Herstellung, das sich dadurch auszeichnet, dass der mit den beiden Kontaktstücken zu einer Einheit verbundene Schmelz leiter in ein den Schmelzleiter umgebendes und an einen Teil der Kontaktstücke anschliessendes Patro nengehäuse eingegossen wird.
Die Erfahrungen mit nach diesem Verfahren hergestellten Sicherungspatro nen haben ergeben, dass zur Verfestigung des meist aus trockenem Sand bestehenden Löschmittels zu einem formbeständigen, aber ausreichend porösen Kern nicht jedes erhärtende oder aushärtbare Binde mittel geeignet ist.
Unter den zahlreichen, in der Giesstechnik gebräuchlichen und zur Herstellung von genügend festen und auch porösen Sandkernen grund- sätzlich geeigneten Bindemitteln befinden sich näm lich solche, die unter den beim Durchschmelzen von Sicherungen auftretenden hohen Temperaturen Gase oder Dämpfe abgeben, die die Löschung des Lichtbogens, der beim Ansprechen der Sicherung innerhalb des Patronengehäuses entsteht, so stark verzögern, dass durch den in ihm auftretenden über druck das Patronengehäuse zersprengt wird.
Diese Bindemittel scheiden also für die Verfestigung von Löschmittelkernen aus, denn von einem Löschmittel wird verlangt, dass die zunächst auch nach dem Durchschmelzen des Schmelzleiters noch leitende Schmelzstrecke durch die in deren Bereich verdampf ten und kondensierten Löschmittelteile so schnell wie möglich nichtleitend gemacht wird. Die bekann ten Löschmittel erreichen dies in nicht gebundenem Zustand innerhalb der ausserordentlich kurzen Zeit von wenigen Tausendstelsekunden. Diese Wirkung würde durch die erwähnten Bindemittel aufgehoben werden.
Bei der Verwendung anderer, keine schädlichen Gase oder Dämpfe abgebenden Bindemittel hat sich gezeigt, dass sie nach Beendigung des Löschprozesses geringe Mengen leitender Rückstände hinterlassen, die ausreichen, um eine elektrisch leitende Brücke zwischen den Sicherungskontakten zu bilden und da durch verhindern, dass die Sicherung nach dem Durchschmelzen den erforderlichen Isolationswert er reicht. Sie sind für den hier genannten Zweck gleich falls unbrauchbar.
Als Bindemittel für Löschmittelkerne kommen also nur solche Stoffe in Betracht, die bei ihrer Zer setzung durch die Lichtbogenwärme weder Gase oder Dämpfe entwickeln, die die Löschstrecke ioni sieren, noch als Rückstand feste, elektrisch leitende Stoffe, wie freien Kohlenstoff (Russ), in einer Menge hinterlassen, die zum Entstehen einer Strombrücke ausreicht. Zu den in diesem Sinne nicht brauchbaren Bindemitteln gehören eine Reihe von Kunstharzen, z. B. Epoxyd- und Phenolharze.
Das erfindungsgemässe Verfahren zur Herstellung von Sicherungspatronen der vorgenannten Art ist dadurch gekennzeichnet, dass als Bindemittel zur Herstellung des formbeständigen und porösen Lösch- mittelkerns Stoffe verwendet werden, die bei ihrer Zersetzung durch die Lichtbogenwärme weder die Lichtbogenlöschung verzögernde Gase oder Dämpfe abgeben, noch feste, eine elektrisch leitende Brücke bildende Rückstände hinterlassen.
Als geeignete Bindemittel wurden dagegen er mittelt: Melaminharze, Siliconharze sowie Kalzium- Sulfate.
Additional patent to the main patent no. 381312 Process for the production of a fuse cartridge In the main patent a fuse cartridge is written whose housing is made in one piece as a closed hollow body by casting from synthetic resin, and a method for their production, which is characterized by the fact that with the two contact pieces connected to form a unit fusible conductor is poured into a surrounding the fusible conductor and a part of the contact pieces subsequent cartridge housing.
Experience with fuse cartridges produced using this process has shown that not every hardening or hardenable binding agent is suitable for solidifying the extinguishing agent, which usually consists of dry sand, into a dimensionally stable but sufficiently porous core.
Among the numerous binders commonly used in casting technology and generally suitable for the production of sufficiently firm and also porous sand cores, there are those that give off gases or vapors at the high temperatures that occur when fuses are melted, which cause the arc to be extinguished, which occurs when the fuse inside the cartridge housing is activated, delay it so much that the overpressure that occurs in it bursts the cartridge housing.
These binders are therefore ruled out for the solidification of extinguishing agent cores, because an extinguishing agent is required to render non-conductive as quickly as possible, even after the fusible conductor has melted, by the parts of the extinguishing agent that have evaporated and condensed in its area. The known extinguishing agents achieve this in an unbound state within the extremely short time of a few thousandths of a second. This effect would be neutralized by the binders mentioned.
When using other binders that do not emit harmful gases or vapors, it has been shown that, after the extinguishing process has been completed, they leave behind small amounts of conductive residues that are sufficient to form an electrically conductive bridge between the fuse contacts and thus prevent the fuse from breaking the required insulation value he reaches the melting. They are also useless for the purpose mentioned here.
Only those substances are considered as binders for extinguishing agent cores which, when decomposed by the heat of the arc, do not develop gases or vapors that ionize the extinguishing path, nor do solid, electrically conductive substances such as free carbon (soot) in one residue Leave an amount that is sufficient to create a current bridge. The binders that cannot be used in this sense include a number of synthetic resins, e.g. B. epoxy and phenolic resins.
The inventive method for the production of fuse cartridges of the aforementioned type is characterized in that substances are used as binders for the production of the dimensionally stable and porous extinguishing agent core, which when decomposed by the arc heat neither release gases or vapors that delay the arc extinguishing, nor solid, a Leaving residues that form electrically conductive bridges.
In contrast, the following were identified as suitable binders: melamine resins, silicone resins and calcium sulphates.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED33033A DE1202892B (en) | 1960-04-04 | 1960-04-04 | Fuse cartridge |
DED34704A DE1296693B (en) | 1960-04-04 | 1960-11-10 | Procedure for manufacturing fuse cartridges |
DED0035316 | 1961-02-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH392671A true CH392671A (en) | 1965-05-31 |
Family
ID=27209695
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1415660A CH381312A (en) | 1960-04-04 | 1960-12-19 | Fuse cartridge |
CH45361A CH392671A (en) | 1960-04-04 | 1961-01-14 | Method of manufacturing a fuse cartridge |
CH1364261A CH388431A (en) | 1960-04-04 | 1961-11-23 | Fuse cartridge |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1415660A CH381312A (en) | 1960-04-04 | 1960-12-19 | Fuse cartridge |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1364261A CH388431A (en) | 1960-04-04 | 1961-11-23 | Fuse cartridge |
Country Status (7)
Country | Link |
---|---|
US (2) | US3196521A (en) |
CH (3) | CH381312A (en) |
DE (2) | DE1202892B (en) |
FI (1) | FI40397B (en) |
IT (1) | IT699995A (en) |
LU (2) | LU39090A1 (en) |
NL (3) | NL272345A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928822A1 (en) * | 1979-07-17 | 1981-02-05 | Siemens Ag | High tension fuse - with core of moulding sand and binder carrying fuse wire spiral in quartz sand filled sleeve |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3317690A (en) * | 1960-04-04 | 1967-05-02 | Driescher Spezialfab Fritz | Fuse cartridge |
FR83398E (en) * | 1963-04-05 | 1964-07-31 | Ferraz & Cie Lucien | Improvements to electrical fuses |
US3268698A (en) * | 1963-08-12 | 1966-08-23 | Westinghouse Electric Corp | Electrical apparatus comprising sulfur hexafluoride and organic insulation with anhydrous calcium sulfate |
US3337705A (en) * | 1964-01-27 | 1967-08-22 | Chase Shawmut Co | Fusible protective device |
US3358064A (en) * | 1964-03-24 | 1967-12-12 | Vitramon Inc | Encapsulating molding composition and method for molding the same |
US3319027A (en) * | 1965-01-26 | 1967-05-09 | Chase Shawmut Co | Encapsulated fuse structure for polyphase circuits |
US3368047A (en) * | 1967-06-19 | 1968-02-06 | Westinghouse Electric Corp | Fuse having a sand core |
US3654696A (en) * | 1970-01-29 | 1972-04-11 | Bernard Wechsler | Method for manufacturing electric fuses |
US3914863A (en) * | 1972-05-04 | 1975-10-28 | Gerald Wiebe | Method of forming a fuse |
US3838375A (en) * | 1973-01-29 | 1974-09-24 | Gen Electric | Current limiting fuse |
US4313099A (en) * | 1980-01-03 | 1982-01-26 | Mcgraw-Edison Company | Current limiting fuse having aluminum sulfate arc-quenching filler |
US5670926A (en) * | 1995-06-08 | 1997-09-23 | General Electric Company | High-voltage fuse having a core of bound silica sand about which fusible elements are wound |
EP1162640A1 (en) | 2000-06-07 | 2001-12-12 | Abb Research Ltd. | Arc extinguishing material |
US6642833B2 (en) | 2001-01-26 | 2003-11-04 | General Electric Company | High-voltage current-limiting fuse |
FI117587B (en) | 2004-06-18 | 2006-11-30 | Nethawk Oyj | Method, device, and computer program product for monitoring data communications |
DE102013208135B4 (en) | 2013-05-03 | 2023-11-09 | Robert Bosch Gmbh | Battery with overcharge protection |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE412490C (en) * | 1923-07-13 | 1925-04-23 | Elfa Elektrotechnische Fabrik | Fusible link with variable cross-section and with over-molding made of insulating material |
US1862317A (en) * | 1927-12-23 | 1932-06-07 | Schweitzer & Conrad Inc | Fuse |
US1934459A (en) * | 1928-03-23 | 1933-11-07 | Gen Electric | High vacuum fuse |
US1875031A (en) * | 1928-11-10 | 1932-08-30 | Gen Chemical Corp | Machine for making wax bottles |
US1935885A (en) * | 1930-01-15 | 1933-11-21 | Telefunken Gmbh | Electrical apparatus |
US1947085A (en) * | 1931-09-22 | 1934-02-13 | Westinghouse Electric & Mfg Co | Electrical apparatus |
US2328825A (en) * | 1941-09-25 | 1943-09-07 | Schweitzer & Conrad Inc | Arc-extinguishing means |
US2493434A (en) * | 1946-03-21 | 1950-01-03 | Joslyn Mfg And Supply Company | Method of manufacturing fuse links |
US2681398A (en) * | 1953-03-27 | 1954-06-15 | Chase Shawmut Co | Fluid-tight fuse structure |
US2768264A (en) * | 1953-04-28 | 1956-10-23 | Rostone Corp | Arc-suppressing device |
US2816990A (en) * | 1954-09-24 | 1957-12-17 | Westinghouse Electric Corp | Circuit breaker |
US2740187A (en) * | 1955-03-07 | 1956-04-03 | Chase Shawmut Co | Methods of assembling fuses |
US2948930A (en) * | 1955-08-09 | 1960-08-16 | Biwax Corp | Method of potting electrical equipment |
US2940161A (en) * | 1955-10-11 | 1960-06-14 | Western Electric Co | Methods of making encapsulated electrical devices |
US2847707A (en) * | 1956-01-23 | 1958-08-19 | Walter J Maker | Apparatus for encapsulating articles in a plastic coating |
US2949641A (en) * | 1956-06-26 | 1960-08-23 | Whitney Blake Co | Electrical connector manufacture |
US2830156A (en) * | 1956-12-21 | 1958-04-08 | Jr Arthur A Burgess | Shock and vibration resistant fuse |
US2941905A (en) * | 1957-04-05 | 1960-06-21 | Westinghouse Electric Corp | Filled organopolysiloxane coating for electrical members |
US2866038A (en) * | 1957-05-09 | 1958-12-23 | Chase Shawmut Co | Current-limiting fuses with increased interrupting capacity |
US2961514A (en) * | 1959-01-19 | 1960-11-22 | S & C Electric Co | Circuit interrupter |
US3030597A (en) * | 1958-02-28 | 1962-04-17 | Westinghouse Electric Corp | Insulated electrical apparatus |
US2892061A (en) * | 1958-07-24 | 1959-06-23 | Chase Shawmut Co | Fuses with fulgurite suppressing means |
US2895031A (en) * | 1958-07-24 | 1959-07-14 | Chase Shawmut Co | Fusible protective devices |
US2946092A (en) * | 1958-08-04 | 1960-07-26 | Barr Rubber Products Company | Apparatus for rotationally distributing a liquid charge within a mold |
-
0
- IT IT699995D patent/IT699995A/it unknown
- NL NL133175D patent/NL133175C/xx active
- NL NL255898D patent/NL255898A/xx unknown
- NL NL272345D patent/NL272345A/xx unknown
-
1960
- 1960-04-04 DE DED33033A patent/DE1202892B/en active Pending
- 1960-08-18 LU LU39090D patent/LU39090A1/xx unknown
- 1960-09-19 US US56722A patent/US3196521A/en not_active Expired - Lifetime
- 1960-11-10 DE DED34704A patent/DE1296693B/en active Pending
- 1960-12-19 CH CH1415660A patent/CH381312A/en unknown
- 1960-12-20 LU LU39561D patent/LU39561A1/xx unknown
- 1960-12-29 FI FI2130/60A patent/FI40397B/fi active
-
1961
- 1961-01-14 CH CH45361A patent/CH392671A/en unknown
- 1961-01-25 US US84769A patent/US3166656A/en not_active Expired - Lifetime
- 1961-11-23 CH CH1364261A patent/CH388431A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928822A1 (en) * | 1979-07-17 | 1981-02-05 | Siemens Ag | High tension fuse - with core of moulding sand and binder carrying fuse wire spiral in quartz sand filled sleeve |
Also Published As
Publication number | Publication date |
---|---|
LU39561A1 (en) | 1961-02-20 |
US3166656A (en) | 1965-01-19 |
NL255898A (en) | |
CH388431A (en) | 1965-02-28 |
LU39090A1 (en) | 1960-10-18 |
NL272345A (en) | |
DE1296693B (en) | 1969-06-04 |
US3196521A (en) | 1965-07-27 |
DE1202892B (en) | 1965-10-14 |
IT699995A (en) | |
NL133175C (en) | |
CH381312A (en) | 1964-08-31 |
FI40397B (en) | 1968-09-30 |
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