DE1294529B - Fuse - Google Patents
FuseInfo
- Publication number
- DE1294529B DE1294529B DEF42510A DEF0042510A DE1294529B DE 1294529 B DE1294529 B DE 1294529B DE F42510 A DEF42510 A DE F42510A DE F0042510 A DEF0042510 A DE F0042510A DE 1294529 B DE1294529 B DE 1294529B
- Authority
- DE
- Germany
- Prior art keywords
- fuse
- insulating compound
- fusible links
- fuse body
- arc
- 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.)
- Pending
Links
- 150000001875 compounds Chemical class 0.000 claims description 14
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 3
- -1 B. sodium silicate Chemical compound 0.000 claims 1
- 230000018044 dehydration Effects 0.000 claims 1
- 238000006297 dehydration reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 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
-
- 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
- H01H85/38—Means for extinguishing or suppressing arc
-
- 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
- H01H85/38—Means for extinguishing or suppressing arc
- H01H85/42—Means for extinguishing or suppressing arc using an arc-extinguishing gas
-
- 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
- H01H85/0013—Means for preventing damage, e.g. by ambient influences to the fuse
- H01H85/0017—Means for preventing damage, e.g. by ambient influences to the fuse due to vibration or other mechanical forces, e.g. centrifugal forces
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Fuses (AREA)
Description
Die Erfindung bezieht sich auf eine Schmelzsicherung, bei der die Schmelzeinsätze in eine nicht brennbare Isoliermasse im Innern eines rohrförmigen Sicherungskörpers eingebettet sind, an dem die Anschlußköpfe mit den Kontakten befestigt sind.The invention relates to a fuse in which the Fusible links in a non-flammable insulating compound inside a tubular Fuse body are embedded, on which the connection heads are attached to the contacts are.
Es ist bekannt, das Innere des die Schmelzeinsätze enthaltenden rohrförmigen Sicherungskörpers mit Wasserstoff oder einem anderen Gas zu füllen, um eine gute Löschung des Abschaltlichtbogens zu erhalten.It is known the interior of the tubular containing the fusible links Fuse body with hydrogen or another gas to fill a good Extinguishing of the cut-off arc.
Auch sind pulverförmige Löschmittelfüllstoffe bekannt, wobei die Räume zwischen den Partikeln dieser Füllstoffe zur weiteren Verbesserung der Löschwirkung noch mit Wasserstoff ausgefüllt sein können.Powdered extinguishing agent fillers are also known, the spaces between the particles of these fillers to further improve the extinguishing effect can still be filled with hydrogen.
Durch diese Löschmittelstoffe werden die Schmelzeinsätze - wenn überhaupt - nur wenig gegenüber Stößen, Schwingungen und Beschleunigungskräften gehalten, die ein Zerstören der Schmelzeinsätze hervorrufen können, insbesondere wenn diese vom festgelegten Maximalstrom erwärmt sind.These extinguishing agents are used to remove the fusible links - if at all - little resistance to shocks, vibrations and acceleration forces, which can cause the fusible links to be destroyed, especially if these are heated by the specified maximum current.
Es ist daher bereits vorgeschlagen worden, die Schmelzeinsätze in eine Kunstharzmasse einzubetten, so daß diese gegenüber Stößen usw. gesichert sind. Im Betrieb ergibt sich jedoch durch die normale Erwärmung der Schmelzeinsätze eine Abscheidung von kohleartigen Stoffen aus dem Kunstharz, so daß bei Überbelastung der Schmelzsicherung durch diese Ablagerungen die Bildung eines Lichtbogens begünstigt wird.It has therefore already been proposed that the fusible links in embed a synthetic resin compound so that they are secured against impacts, etc. During operation, however, the normal heating of the fusible links results in a Separation of carbon-like substances from the synthetic resin, so that when overloaded the fuse favors the formation of an electric arc through these deposits will.
Die Aufgabe der Erfindung liegt darin, die Schmelzeinsätze in eine Masse einzubetten, die während des Betriebs keine Veränderungen erfährt und bei der Herstellung der Schmelzsicherungen leicht zu verarbeiten ist.The object of the invention is the fusible links in a Embed mass that does not change during operation and with the manufacture of the fuses is easy to process.
Diese Aufgabe wird bei einer Schmelzsicherung der eingangs genannten Art dadurch gelöst, daß die Isoliermasse aus einem hydratisierten Silikat, z. B. Natriumsilikat, besteht, das nach dem Einbringen in den Sicherungskörper durch Wasserentzug verfestigt ist.In the case of a fuse, this task becomes the one mentioned at the beginning Art solved in that the insulating mass consists of a hydrated silicate, for. B. Sodium silicate, which is made by removing water after it has been introduced into the fuse body is solidified.
Um bei der Schmelzsicherung gemäß der Erfindung auch eine gute Löschung des Abschaltlichtbogens zu erhalten, kann die verfestigte Isoliermasse eine vorgeformte Kammer enthalten, die mit einem lichtbogenlöschenden Medium gefüllt und durch einen Stopfen verschlossen ist.In order to achieve good extinguishing in the fuse according to the invention To get the cut-off arc, the solidified insulating compound can be a preformed Chamber included, which is filled with an arc-extinguishing medium and through a Stopper is closed.
Die Zeichnung veranschaulicht zwei Ausführungsbeispiele der Erfindung, die in F i g. 1 und 2 im Längsschnitt dargestellt sind.The drawing illustrates two embodiments of the invention, the in F i g. 1 and 2 are shown in longitudinal section.
Bei der Sicherung nach F i g. 1 sitzen Messerkontakte 1 an zylindrischen Anschlußköpfen 2 aus Metall, die durch Schrauben 3 an den beiden Enden eines rohrförmigen Sicherungskörpers 4 befestigt sind. Die Anschlußköpfe 2 haben innen in der Mitte kurze Zapfen 5, an denen die Enden der Schmelzeinsätze 6 angeschweißt sind, die beispielsweise in der üblichen Weise aus Silberstreifen bestehen. Der Sicherungskörper 4 enthält eine seitliche Öffnung 4 a, durch die beim Herstellen der Sicherung hydratisiertes Natriumsilikat in Pastenform mit etwa 60 bis 75 oh, Wasser i eingeführt wird, das dann durch Erwärmen auf etwa 150° C dehydratisiert wird, um eine feste Isoliermasse 7 zu bilden, in der die Schmelzeinsätze 6 vollständig eingebettet sind. Diese sind damit gegen Schwingungen, Stöße und auch gegen Zentrifugalbeschleunigungen geschützt, wenn die Sicherungen z. B. an umlaufenden Maschinenteilen angebracht sind. Die Isoliermasse 7 ist vollkommen hitzebeständig, und selbst wenn die Schmelzeinsätze 6 durch eine längere überlastung auf erhöhte, dicht unterhalb ihres Schmelzpunktes liegende Temperaturen kommen, besteht keine Zersetzungsgefahr. Es können also keine kohleartigen Produkte entstehen, die durch ihre elektrische Leitfähigkeit einen Weg für einen Lichtbogen zu den Anschlußköpfen 2 ergeben.When securing according to FIG. 1, blade contacts 1 are seated on cylindrical connection heads 2 made of metal, which are fastened by screws 3 to the two ends of a tubular fuse body 4. The connection heads 2 have short pins 5 in the middle, to which the ends of the fusible links 6 are welded, which for example consist of silver strips in the usual manner. The fuse body 4 contains a lateral opening 4 a, through which hydrated sodium silicate in paste form with about 60 to 75 ohm water i is introduced during the production of the fuse, which is then dehydrated by heating to about 150 ° C to form a solid insulating compound 7 form, in which the fusible links 6 are completely embedded. These are thus protected against vibrations, shocks and also against centrifugal accelerations when the fuses z. B. are attached to rotating machine parts. The insulating compound 7 is completely heat-resistant, and even if the fusible links 6 reach elevated temperatures just below their melting point due to prolonged overloading, there is no risk of decomposition. No carbon-like products can therefore arise which, due to their electrical conductivity, provide a path for an arc to the connection heads 2.
Das Silikat der Isoliermasse 7 kann vorteilhaft noch reines Siliziumdioxyd in Pulverform enthalten.The silicate of the insulating compound 7 can advantageously also be pure silicon dioxide contained in powder form.
Die Einführungsöffnung für die Isoliermasse 7 kann statt im Sicherungskörper 4 auch in einem Anschlußkopf vorgesehen sein. Der Querschnitt der Sicherung kann auch quadratisch, rechteckig, polygonal usw. sein.The insertion opening for the insulating compound 7 can instead of in the fuse body 4 can also be provided in a connection head. The cross section of the fuse can also be square, rectangular, polygonal, etc.
Selbstverständlich braucht die Isoliermasse 7 nicht im Sicherungskörper 4 abzubinden. Es kann eine besondere Form für die Herstellung der festen Isoliermasse 7 benutzt werden, so daß ein aus den Teilen 1, 2, 6, 7 gebildetes Ganzes in den Sicherungskörper 4 eingeführt wird.Of course, the insulating compound 7 does not need to set in the fuse body 4. A special mold can be used for the production of the solid insulating compound 7, so that a whole made up of the parts 1, 2, 6, 7 is inserted into the fuse body 4.
Die Sicherung nach F i g. 2 unterscheidet sich von der nach F i g. 1 dadurch, daß die Isoliermasse eine eingeformte Kammer 8 enthält, die durch einen Stopfen 9 verschlossen ist. Die Kammer 8 ist mit einem lichtbogenlöschenden, flüssigen oder gasförmigen Medium, beispielsweise mit Schwefelhexafluorid (SFs), gefüllt. Wenn die Schmelzeinsätze 6 schmelzen, wird der elektrische Lichtbogen in der bekannten Weise unverzüglich durch das SFs gelöscht.The fuse according to FIG. 2 differs from that according to FIG. 1 in that the insulating compound contains a molded chamber 8, which is through a Plug 9 is closed. The chamber 8 is filled with an arc-extinguishing liquid or gaseous medium, for example with sulfur hexafluoride (SFs). When the fusible links 6 melt, the electric arc in the known Way deleted immediately by the SFs.
Die Kammer 8 kann beim Herstellen der Sicherung durch einen kleinen Wachskern erzeugt werden, der auf die Schmelzeinsätze 6 aufgeformt und mit ihnen zusammen in den Sicherungskörper 4 eingesetzt wird, bevor die Isoliermasse 7 eingespritzt wird. Der Kern wird dann durch Ausschmelzen entfernt, indem das Ganze auf eine mäßige Temperatur erwärmt wird.The chamber 8 can when making the fuse by a small Wax core are generated, which is molded onto the melting inserts 6 and with them is inserted together into the fuse body 4 before the insulating compound 7 is injected will. The core is then removed by melting out, bringing the whole thing to a moderate level Temperature is heated.
Claims (2)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR43523A FR83398E (en) | 1963-04-05 | 1963-04-05 | Improvements to electrical fuses |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1294529B true DE1294529B (en) | 1969-05-08 |
Family
ID=9694364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEF42510A Pending DE1294529B (en) | 1963-04-05 | 1964-04-03 | Fuse |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3317689A (en) |
| CH (1) | CH413062A (en) |
| DE (1) | DE1294529B (en) |
| FR (1) | FR83398E (en) |
| GB (1) | GB1010128A (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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3967228A (en) * | 1975-10-09 | 1976-06-29 | General Electric Company | Electric current limiting fuse having a filter disposed in one end cap |
| GB8519601D0 (en) * | 1985-08-05 | 1985-09-11 | Dubilier Plc | Time-lag fuses |
| FR2632449B1 (en) * | 1988-06-07 | 1990-09-14 | Ferraz | PROCESS FOR PRODUCING ELECTRIC FUSES WITH AGGLOMERATED SAND |
| US20050134422A1 (en) * | 2003-12-19 | 2005-06-23 | Okuniewicz Richard J. | MEDIUM VOLTAGE FUSES: sheathed element reduces I2t energy during short-circuit operation |
| US9892880B2 (en) * | 2014-05-22 | 2018-02-13 | Littelfuse, Inc. | Insert for fuse housing |
| US9607799B2 (en) * | 2014-05-22 | 2017-03-28 | Littelfuse, Inc. | Porous inlay for fuse housing |
| RU191172U1 (en) * | 2019-03-20 | 2019-07-29 | Федеральное государственное автономное образовательное учреждение высшего образования "Крымский федеральный университет имени В.И. Вернадского" | Fuse |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB369550A (en) * | 1929-10-08 | 1932-03-24 | Philips Nv | Improvements in or relating to fuses for high voltages |
| DE631359C (en) * | 1934-03-25 | 1936-06-18 | Siemens Schuckertwerke Akt Ges | Electric fuse |
| US2539261A (en) * | 1949-11-26 | 1951-01-23 | Pennsylvania Salt Mfg Co | Fuse |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB190220483A (en) * | 1902-09-19 | 1903-07-23 | Oliver Leopold Peard | Improvements in Electric Safety Fuses. |
| US1270335A (en) * | 1914-12-17 | 1918-06-25 | Edmund O Schweitzer | Fuse device. |
| US1266479A (en) * | 1916-09-18 | 1918-05-14 | Victor G Jensen | Fuse. |
| US1480225A (en) * | 1921-09-08 | 1924-01-08 | Western Electric Co | Electrical cut-out |
| US1614014A (en) * | 1925-01-08 | 1927-01-11 | Thomas E Murray | Electric fuse |
| US1873339A (en) * | 1927-04-02 | 1932-08-23 | Edmund O Schweitzer | Fuse |
| US1965239A (en) * | 1930-10-22 | 1934-07-03 | Hill George Leslie | High potential fuse |
| US2223959A (en) * | 1937-05-04 | 1940-12-03 | Gen Electric | Current limiting fuse |
| US2337504A (en) * | 1940-09-19 | 1943-12-21 | Westinghouse Electric & Mfg Co | Current limiting fuse |
| US2493434A (en) * | 1946-03-21 | 1950-01-03 | Joslyn Mfg And Supply Company | Method of manufacturing fuse links |
| US2837614A (en) * | 1953-10-19 | 1958-06-03 | Mc Graw Edison Co | Protectors for electric circuits |
| US2866040A (en) * | 1957-09-13 | 1958-12-23 | Gen Electric | Low-voltage current-limiting fuse |
| US3005074A (en) * | 1959-02-26 | 1961-10-17 | Mc Graw Edison Co | Circuit interrupting devices |
| IT699995A (en) * | 1960-04-04 |
-
1963
- 1963-04-05 FR FR43523A patent/FR83398E/en not_active Expired
-
1964
- 1964-03-30 US US355603A patent/US3317689A/en not_active Expired - Lifetime
- 1964-04-02 CH CH426564A patent/CH413062A/en unknown
- 1964-04-03 DE DEF42510A patent/DE1294529B/en active Pending
- 1964-04-03 GB GB139?9/64D patent/GB1010128A/en not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB369550A (en) * | 1929-10-08 | 1932-03-24 | Philips Nv | Improvements in or relating to fuses for high voltages |
| DE631359C (en) * | 1934-03-25 | 1936-06-18 | Siemens Schuckertwerke Akt Ges | Electric fuse |
| US2539261A (en) * | 1949-11-26 | 1951-01-23 | Pennsylvania Salt Mfg Co | Fuse |
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 |
|---|---|
| FR83398E (en) | 1964-07-31 |
| US3317689A (en) | 1967-05-02 |
| GB1010128A (en) | 1965-11-17 |
| CH413062A (en) | 1966-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E77 | Valid patent as to the heymanns-index 1977 |