EP0417223B1 - Fuse - Google Patents
Fuse Download PDFInfo
- Publication number
- EP0417223B1 EP0417223B1 EP90903752A EP90903752A EP0417223B1 EP 0417223 B1 EP0417223 B1 EP 0417223B1 EP 90903752 A EP90903752 A EP 90903752A EP 90903752 A EP90903752 A EP 90903752A EP 0417223 B1 EP0417223 B1 EP 0417223B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuse
- wire
- fact
- melting
- wires
- 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
- 230000008018 melting Effects 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 15
- 230000005496 eutectics Effects 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 claims 1
- 238000013021 overheating Methods 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract 1
- 210000000746 body region Anatomy 0.000 description 10
- 230000006378 damage Effects 0.000 description 5
- 229910001152 Bi alloy Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 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
-
- 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
- H01H85/185—Insulating members for supporting fusible elements inside a casing, e.g. for helically wound fusible elements
-
- 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
- H01H85/0411—Miniature 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
- H01H85/048—Fuse resistors
-
- 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
- H01H85/0039—Means for influencing the rupture process of the fusible element
- H01H85/0047—Heating means
- H01H85/0052—Fusible element and series heating means or series heat dams
Definitions
- the present invention relates to a fuse according to the preamble of claim 1.
- sensitive electronic circuits such as those used in complex control systems, computers, etc.
- sensitive electronic circuits are generally protected against excessive voltages or currents by means of fuses in order to prevent their destruction.
- This is particularly advantageous wherever relatively simple and cheap power supplies are used, which are connected to the public power supply, respectively. the voltage made available to the power grid, with its variations and current surges, cannot smooth, compensate or filter out.
- Conventional fuses which usually consist of a resistance or fuse wire, which is clamped in a glass tube between two contact shoes, or which have a similar design, are unable to suppress transients that occur briefly in the power supply and are quick enough to overheat the circuit react to protect them from heat-related damage. Undesired transients are therefore eliminated in the conventional electronic circuits by means of discrete series resistors and separate thermal fuses are used to protect the circuits and / or devices against overheating.
- GB-A-2-182811 discloses a fuse with a fuse body, on the side regions of which a wound connecting wire is arranged.
- the present invention has for its object to provide a fuse that a downstream Protects consumers, for example in the form of an electronic circuit, at the same time against overvoltages, overcurrents and transients spwoe overheating and their dimensions are as small as possible and react individually to each of the disturbing factors mentioned so quickly that the consumer is safely protected from damage.
- the new fuse should also be constructed mechanically in such a way that it is avoided with certainty that when the fuse is blown, liquefied fuse wire can create a new electrically conductive connection between the two fuse contacts after it has dripped and solidified again.
- FIG. 1 and 2 show a body 1 of a fuse according to the invention, which body essentially comprises three body regions 1a, 1b, and 1c and advantageously consists of plastic or ceramic.
- the body regions 1a and 1c can be identical to each other and connected to the middle body region 1b in a mirror image with respect to an axis of symmetry BB. you are advantageously with a connecting wire 2a, respectively. 2c, which can be used to solder the fuse according to the invention, for example into a printed circuit. It is advantageous if the two lateral body regions 1a and 1c have a substantially circular cross section and are shaped like screws. Where they merge into the middle body area 1b, the two outer body areas 1a and 1c each advantageously have a flattening 3a and 3c, the function of which is described below.
- the central body region 1b is advantageously essentially rectangular in plan view and has a border 4, within which a central block 5 with three transverse walls 5a, 5b and 5c is arranged.
- the middle transverse wall 5b is higher than the other two transverse walls 5a and 5c, to each of which an opening 6a or. 6c connects.
- the outer areas 5d and 5e of the central transverse wall 5b are advantageously pulled up to the height of the border 4 and serve the fuse wire 7 as lateral boundaries, respectively. Attacks.
- the fuse wire 7 which is advantageously a flat wire made of a eutectic lead-bismuth alloy with a melting point of about 125 ° C, from the flattening 3a on the side body area 1a through the Opening 6a in the central body region 1b via the three transverse walls 5a, 5b and 5c and through the opening 6c to flattening 3c on the lateral body region 1c.
- resistance wires 8a and 8c inserted in the helical grooves of the lateral body regions 1a and 1c, which in turn are also connected to the respective contact wires 2a, respectively. 2c are connected such that they are wrapped around them.
- the contact zones connecting wire 2a / resistance wire 8a, resistance wire 8a / fuse wire 7 as well as fuse wire 7 / resistance wire 8c and resistance wire 8c / connecting wire 2c can be covered with an electrically conductive adhesive, for example a copper or silver-containing two-component adhesive. Because of the low melting temperature of the fuse wire 7, soldering the fuse wire 7 to the resistance wires 8a and 8c is very difficult and hardly possible, but cannot be ruled out if the solder is selected accordingly.
- the three body regions 1a, 1b and 1c of the described embodiment variant of a fuse according to the invention are advantageously placed in a small plastic tube, preferably in the form of a shrink tube, in such a way that a component is produced which has both the appearance and also corresponds to a resistance in terms of dimensions.
- a fuse wire with a melting temperature of only approx. 125 ° C. is also very advantageous and can practically only be achieved thanks to the inventive connection of a fuse wire with resistance wire series resistors on a fuse body.
- the Resistor wire windings can be dispensed with and in their place, low-resistance connecting wires can establish the electrical connection between the fuse wire and the connecting wires.
- the fuse wire 7 is sufficiently thermally insulated from the connecting wires in such a way that they can easily be soldered into a printed circuit, for example, without the risk that the fuse wire will be melted as a result.
- the low melting point of the eutectic lead-bismuth alloy allows the fuse to also be used as a thermal fuse, which melts before overheating in the area of the circuit carrying the fuse can cause this damage.
- the shape of the central block 5 with its three transverse walls 5a, 5b and 5c offers great advantages over conventional fuses, because in no position of the fuse can blown and melted fuse wire form a fuse trace connecting the two remaining ends of the fuse wire.
- the embodiment variant of a fuse according to the invention described above and shown in the drawing can be produced automatically and inexpensively in large series.
- the level of the switching current can be determined by adequate dimensioning of the cross section of the fuse wire.
- the value of the two series resistors can also be easily adjusted by selecting an appropriate resistance wire.
- the connecting wires 2a and 2c can be replaced by contact shoes, for example, which can be placed in a known manner on the two ends of the lateral body regions 1a and 1c.
- the fuse according to the invention offers significant advantages over the known elements of this type, which lie in particular in the fact that a single, small-sized, discrete element can perform several functions.
Landscapes
- Fuses (AREA)
- Emergency Protection Circuit Devices (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Techniques For Improving Reliability Of Storages (AREA)
- Thermistors And Varistors (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Schmelzsicherung gemäss dem Oberbegriff des Patentanspruchs 1.The present invention relates to a fuse according to the preamble of
Insbesondere empfindliche elektronische Schaltungen, wie sie beispielsweise in aufwendigen Steuerungen, Computern, etc. zur Anwendung gelangen, werden in der Regel mittels Schmelzsicherungen vor überhöhten Spannungen oder Strömen gesichert, um deren Zerstörung zu verhindern. Dies ist speziell überall dort von Vorteil, wo relativ einfache und billige Netzteile verwendet werden, die die über die öffentliche Stromversorgung, resp. das Stromnetz zur Verfügung gestellte Spannung mit ihren Variationen und Stromstössen nicht zu glätten, kompensieren oder auszufiltern vermögen.In particular, sensitive electronic circuits, such as those used in complex control systems, computers, etc., are generally protected against excessive voltages or currents by means of fuses in order to prevent their destruction. This is particularly advantageous wherever relatively simple and cheap power supplies are used, which are connected to the public power supply, respectively. the voltage made available to the power grid, with its variations and current surges, cannot smooth, compensate or filter out.
Herkömmliche Schmelzsicherungen, die üblicherweise aus einem Widerstands- oder Schmelzdraht bestehen, der in einem Glasröhrchen zwischen zwei Kontaktschuhe eingespannt ist, oder die ähnlich aufgebaut sind, sind nicht in der Lage, in der Stromversorgung kurzfristig auftretende Transienten zu unterdrücken und schnell genug auf Ueberhitzungen der Schaltung zu reagieren, um diese vor hitzebedingten Schäden zu bewahren. Unerwünschte Transienten werden daher in den herkömmlichen elektronischen Schaltungen, mittels diskreten Vorwiderständen eliminiert und separate Thermosicherungen werden für die Sicherung der Schaltungen und/oder Geräte gegen Ueberhitzung eingesetzt.Conventional fuses, which usually consist of a resistance or fuse wire, which is clamped in a glass tube between two contact shoes, or which have a similar design, are unable to suppress transients that occur briefly in the power supply and are quick enough to overheat the circuit react to protect them from heat-related damage. Undesired transients are therefore eliminated in the conventional electronic circuits by means of discrete series resistors and separate thermal fuses are used to protect the circuits and / or devices against overheating.
Aus der US-A-2 017 492 ist eine Schmelzsicherung mit Brücken zum Stützen des Schmelzstreifens bekannt. In der GB-A-2-182811 ist eine Schmelzsicherung mit einem Sicherungskörper offenbart auf dessen seitlichen Bereichen aufgewickelter Verbindungsdraht angeordnet ist.From US-A-2 017 492 a fuse with bridges for supporting the fuse strip is known. GB-A-2-182811 discloses a fuse with a fuse body, on the side regions of which a wound connecting wire is arranged.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Schmelzsicherung zu schaffen, die einen nachgeschalteten Verbraucher, beispielsweise in Form einer elektronischen Schaltung, gleichzeitig gegen Ueberspannungen, Ueberströme und Transienten spwoe Ueberhitzung sichert und in ihren Abmessungen möglichst klein ist und auf jeden der erwähnten Störfaktoren einzeln so schnell reagiert, dass der Verbraucher mit Sicherheit vor Schäden bewahrt bleibt. Die neue Schmelzsicherung soll ferner mechanisch so konstruiert sein, dass mit Sicherheit vermieden wird, dass beim sogenannten Durchbrennen der Sicherung verflüssigter Schmelzdraht nach dem Abtropfen und Wiedererstarren eine neue elektrisch leitende Verbindung zwischen den beiden Sicherungskontakten herstellen kann.The present invention has for its object to provide a fuse that a downstream Protects consumers, for example in the form of an electronic circuit, at the same time against overvoltages, overcurrents and transients spwoe overheating and their dimensions are as small as possible and react individually to each of the disturbing factors mentioned so quickly that the consumer is safely protected from damage. The new fuse should also be constructed mechanically in such a way that it is avoided with certainty that when the fuse is blown, liquefied fuse wire can create a new electrically conductive connection between the two fuse contacts after it has dripped and solidified again.
Erfindungsgemäss wird diese Aufgabe durch eine Schmelzsicherung gelöst, wie sie im Patentanspruch 1 definiert ist.According to the invention, this object is achieved by a fuse, as defined in
Der Aufbau und die Funktion einer vorteilhaften Ausführungsvariante einer solchen erfindungsgemässen Schmelzsicherung wird hiernach anhand der Zeichnung erläutert. In Letzterer zeigt
- Fig. 1 den Körper einer solchen erfindungsgemässen Schmelzsicherung von oben gesehen, ohne eingelegte Schmelz- und Widerstandsdrähte,
- Fig. 2 den Schmelzsicherungskörper nach Fig. 1 im Längsschnitt entlang der Linie A-A, wobei der Schmelzdraht eingelegt und Widerstandsdrähte angedeutet sind.
- 1 seen the body of such a fuse according to the invention from above, without inserted fuse and resistance wires,
- Fig. 2 shows the fuse body of Fig. 1 in longitudinal section along the line AA, with the fuse wire inserted and resistance wires are indicated.
Man erkennt in den Fig. 1 und 2 einen Körper 1 einer erfindungsgemässen Schmelzsicherung, welcher Körper im wesentlichen drei Körperbereiche 1a, 1b, und 1c umfasst und vorteilhafterweise aus Kunststoff oder Keramik besteht. Die Körperbereiche 1a und 1c können einander identisch und spiegelbildlich bezüglich einer Symmetrieachse B-B mit dem mittleren Körperbereich 1b verbunden sein. Sie sind vorteilhafterweise mit je einem Anschlussdraht 2a, resp. 2c bestückt, die dem Einlöten der erfindungsgemässen Schmelzsicherung z.B. in eine gedruckte Schaltung dienen können. Es ist günstig, wenn die beiden seitlichen Körperbereiche 1a und 1c im wesentlichen einen kreisrunden Querschnitt aufweisen und schraubenähnlich geformt sind. Da, wo sie in den mittleren Körperbereich 1b übergehen, weisen die beiden äusseren Körperbereiche 1a und 1c vorteilhafterweise je eine Abflachung 3a und 3c auf, deren Funktion weiter unten beschrieben wird.1 and 2 show a
Der mittlere Körperbereich 1b ist in Draufsicht vorteilhafterweise im wesentlichen rechteckig gestaltet und weist eine Umrandung 4 auf, innerhalb von welcher ein zentraler Block 5 mit drei Querwandungen 5a, 5b und 5c angeordnet ist. Die mittlere Querwandung 5b ist dabei höher als die beiden anderen Querwandungen 5a und 5c, an welche sich je eine Oeffnung 6a resp. 6c anschliesst. Die äusseren Bereiche 5d und 5e der mittleren Querwandung 5b sind vorteilhafterweise bis auf die Höhe der Umrandung 4 hochgezogen und dienen dem Schmelzdraht 7 als seitliche Begrenzungen, resp. Anschläge.The
Wie aus Fig. 2 ersichtlich ist, wird der Schmelzdraht 7, bei dem es sich vorteilhafterweise um einen Flachdraht aus einer eutektischen Blei-Wismuth-Legierung mit einem Schmelzpunkt von ca. 125° C handelt, von der Abflachung 3a am seitlichen Körperbereich 1a durch die Oeffnung 6a im mittleren Körperbereich 1b über die drei Querwandungen 5a, 5b und 5c und durch die Oeffnung 6c zur Abflachung 3c am seitlichen Körperbereich 1c geführt. An beiden Abflachungen 3a und 3c steht er in elektrischem Kontakt mit in den schraubenförmigen Rillen der seitlichen Körperbereiche 1a und 1c eingelegten Widerstandsdrähten 8a und 8c, die ihrerseits auch mit den jeweiligen Kontaktdrähten 2a, resp. 2c derart verbunden sind, dass sie um diese herumgewickelt werden. Dadurch entsteht eine elektrische Verbindung zwischen dem Anschlussdraht 2a und dem Anschlussdraht 2c, die über den Widerstandsdraht 8a, den Schmelzdraht 7 und den Widerstandsdraht 8c führt. Zwecks Erhöhung der Kontaktsicherheit können die Kontaktzonen Anschlussdraht 2a / Widerstandsdraht 8a, Widerstandsdraht 8a / Schmelzdraht 7 sowie Schmelzdraht 7 / Widerstandsdraht 8c und Widerstandsdraht 8c / Anschlussdraht 2c mit einem elektrisch leitenden Kleber, beispielsweise einem kupfer- oder silberhaltigen Zweikomponentenkleber, bedeckt werden. Aufgrund der tiefen Schmelztemperatur des Schmelzdrahtes 7 ist ein Verlöten des Schmelzdrahtes 7 mit den Widerstandsdrähten 8a und 8c sehr schwierig und kaum rationell möglich, aber bei entsprechender Wahl des Lotes nicht ausgeschlossen. Die drei Körperbereiche 1a, 1b und 1c der beschriebenen Ausführungsvariante einer erfindungsgemässen Schmelzsicherung werden zwecks Vermeidung mechanischer Beschädigungen des Schmelzdrahtes und der Widerstandsdrähte vorteilhafterweise in ein Kunststoffröhrlein, möglichst in Form eines Schrumpfschlauches, gelegt, derart, dass ein Bauteil entsteht, das sowohl dem Aussehen nach wie auch in punkto Dimensionen im wesentlichen einem Widerstand entspricht.As can be seen from Fig. 2, the
Der Fachmann erkennt leicht, dass das Einlegen eines Schmelzdrahtes zwischen zwei Widerstandsdraht-Wicklungen, von denen jede als Vorwiderstand dient, vorteilhaft ist und die Schmelzsicherung in beiden Einbaurichtungen gegen Transienten unempfindlich macht, da diese durch den jeweiligen Vorwiderstand weitgehend eliminiert werden. Die Verwendung eines flachen, im wesentlichen einen rechteckigen Querschnitt aufweisenden Schmelzdrahtes unterstützt dabei die Wirkung des Vorwiderstandes.A person skilled in the art will readily recognize that inserting a fuse wire between two resistance wire windings, each of which serves as a series resistor, is advantageous and makes the fuse in both installation directions insensitive to transients, since these are largely eliminated by the respective series resistor. The use of a flat, essentially rectangular cross-section fuse wire supports the effect of the series resistor.
Die Verwendung eines Schmelzdrahtes mit einer Schmelztemperatur von nur ca. 125° C ist ebenfalls sehr vorteilhaft und kann praktisch nur dank der erfindungsgemässen Verbindung eines Schmelzdrahtes mit Widerstandsdraht-Vorwiderständen auf einem Sicherungskörper realisiert werden. Dabei ist zu berücksichtigen, dass bei Bedarf auf die Widerstandsdraht-Wicklungen verzichtet werden kann und an deren Stelle niederohmige Verbindungsdrähte die elektrische Verbindung zwischen Schmelzdraht und Anschlussdrähten herstellen können. Durch diese oder die Widerstandsdrähte ist der Schmelzdraht 7 thermisch genügend von den Anschlussdrähten isoliert, derart, dass diese problemlos z.B. in eine gedruckte Schaltung eingelötet werden können, ohne dass das Risiko besteht, dass der Schmelzdraht dadurch zum Schmelzen gebracht wird. Andererseits gestattet es der tiefe Schmelzpunkt der eutektischen Blei-Wismuth-Legierung aber, die Schmelzsicherung auch als Thermosicherung einzusetzen, die abschmilzt, bevor eine Ueberhitzung im Bereich der die Schmelzsicherung tragenden Schaltung dieser Schaden zufügen kann.The use of a fuse wire with a melting temperature of only approx. 125 ° C. is also very advantageous and can practically only be achieved thanks to the inventive connection of a fuse wire with resistance wire series resistors on a fuse body. It should be borne in mind that if necessary the Resistor wire windings can be dispensed with and in their place, low-resistance connecting wires can establish the electrical connection between the fuse wire and the connecting wires. Through this or the resistance wires, the
Der Fachmann erkennt weiter, dass die Formgebung des zentralen Blockes 5 mit seinen drei Querwandungen 5a, 5b und 5c grosse Vorteile gegenüber herkömmlichen Schmelzsicherungen bietet, denn in keiner Lage der Schmelzsicherung kann durchgebrannter und abgeschmolzener Schmelzdraht eine die beiden verbleibenden Schmelzdrahtenden verbindende Schmelzspur bilden.The person skilled in the art further recognizes that the shape of the central block 5 with its three
Der Fachmann erkennt, dass es durchaus möglich ist, die erfindungsgemässe Schmelzsicherung im Detail anders aufzubauen als dies beim beschriebenen vorteilhaften Ausführungsbeispiel der Fall ist. Derartige konstruktive Aenderungen liegen im Bereiche dessen, was der Fachmann ohne erfinderisches Dazutun schaffen kann und werden daher hier nicht näher umschrieben.The person skilled in the art recognizes that it is entirely possible to construct the fuse according to the invention differently in detail than is the case with the advantageous exemplary embodiment described. Such constructive changes are in the range of what the person skilled in the art can do without inventive intervention and are therefore not described in more detail here.
Die hiervor beschriebene und in der Zeichnung dargestellte Ausführungsvariante einer erfindungsgemässen Schmelzsicherung lässt sich automatisch und in grossen Serien kostengünstig herstellen. Die Höhe des Schaltstromes kann durch eine adäquate Dimensionierung des Querschnittes des Schmelzdrahtes bestimmt werden. Der Wert der beiden Vorwiderstände ist durch eine entsprechende Wahl eines Widerstandsdrahtes ebenfalls problemlos einstellbar.The embodiment variant of a fuse according to the invention described above and shown in the drawing can be produced automatically and inexpensively in large series. The level of the switching current can be determined by adequate dimensioning of the cross section of the fuse wire. The value of the two series resistors can also be easily adjusted by selecting an appropriate resistance wire.
Es ist selbstverständlich, dass je nach Einsatzart der erfindungsgemässen Schmelzsicherung die Anschlussdrähte 2a und 2c beispielsweise durch Kontaktschuhe ersetzt werden können, die in bekannter Art und Weise auf die beiden Enden der seitlichen Körperbereiche 1a und 1c aufsetzbar sind.It goes without saying that, depending on the type of use of the fuse according to the invention, the connecting
Die erfindungsgemässe Schmelzsicherung bietet gegenüber den bekannten Elementen dieser Art wesentliche Vorteile, die insbesonder darin liegen, dass ein einziges klein dimensioniertes diskretes Element mehrere Funktionen erfüllen kann.The fuse according to the invention offers significant advantages over the known elements of this type, which lie in particular in the fact that a single, small-sized, discrete element can perform several functions.
Claims (10)
- Melting fuse with a fuse body (1) and a fuse wire (7) located between two connections (2) characterised by the fact that between fuse wire (7) and the connections (2a, 2c) there is on each side section of the fuse body (1) a coil of connecting wire (8a, 8c) and that the fuse wire (7) is located in the central section (1b) of the fuse body (1) which has a number of cross-walls (5a, 5b, 5c) of differing heights also incorporating openings (6a, 6c) for the passage of the fuse wire (7).
- Melting fuse according to Claim 1, characterised by the fact that the side sections (1a, 1c) of the fuse body (1) each have a flat part (3a, 3c) which serve as the connection between the fuse wire (7) and the connecting wires (8a, 8c).
- Melting fuse according to Claim 1, characterised by the fact that the connecting wires (8a, 8c) are resistance wires.
- Melting fuse according to Claim 1, characterised by the fact that in the central section (1b) of the fuse body (1) has a continuous rim (4) inside which there are three cross-walls (5a, 5b, 5c) of which the middle one (5b) is of greater height.
- Melting fuse according to Claim 1, characterised by the fact that the side sections (1a, 1c) of the fuse body is in the form of a spiral.
- Melting fuse according to Claim 4, characterised by the fact that the middle cross-wall (5b) has raised edges (5d, 5e).
- Melting fuse according to Claim 1, characterised by the fact that the fuse body (1) with the fuse wire (7) inserted and with the spirally wound connecting wires (8a, 8c) is accommodated in a tube-like sleeve.
- Melting fuse according to Claim 1, characterised by the fact that the contacts (2a, 2c) in the fuse body (1) are moulded connectors or that they are contact saddles incorporated in the side section (1a, 1c) of the fuse body (1).
- Melting fuse according to Claim 1, characterised by the fact that the fuse wire (7) is made of an eutectic lead-biismuth alloy of a melting point of about 125 deg.C.
- Melting fuse according to Claim 9, characterised by the fact that the fuse wire (7) is mainly of a rectangular cross-section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1003/89A CH677419A5 (en) | 1989-03-17 | 1989-03-17 | |
| CH1003/89 | 1989-03-17 | ||
| PCT/CH1990/000071 WO1990011608A1 (en) | 1989-03-17 | 1990-03-15 | Fuse |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0417223A1 EP0417223A1 (en) | 1991-03-20 |
| EP0417223B1 true EP0417223B1 (en) | 1994-12-28 |
Family
ID=4200186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90903752A Expired - Lifetime EP0417223B1 (en) | 1989-03-17 | 1990-03-15 | Fuse |
Country Status (16)
| Country | Link |
|---|---|
| EP (1) | EP0417223B1 (en) |
| JP (1) | JPH03504783A (en) |
| KR (1) | KR920700464A (en) |
| AT (1) | ATE116478T1 (en) |
| AU (1) | AU640917B2 (en) |
| BR (1) | BR9005961A (en) |
| CA (1) | CA2028862A1 (en) |
| CH (1) | CH677419A5 (en) |
| DE (1) | DE59008120D1 (en) |
| DK (1) | DK0417223T3 (en) |
| ES (1) | ES2070316T3 (en) |
| FI (1) | FI905680A0 (en) |
| HU (2) | HU208194B (en) |
| NO (1) | NO904973L (en) |
| RU (1) | RU2036527C1 (en) |
| WO (1) | WO1990011608A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5418516A (en) * | 1993-11-09 | 1995-05-23 | Littlefuse, Inc. | Surge resistor fuse |
| US6552646B1 (en) * | 2000-04-10 | 2003-04-22 | Bel-Fuse, Inc. | Capless fuse |
| US10992254B2 (en) | 2014-09-09 | 2021-04-27 | Shoals Technologies Group, Llc | Lead assembly for connecting solar panel arrays to inverter |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE312052C (en) * | ||||
| GB191402301A (en) * | 1914-01-28 | 1914-11-12 | Herbert Henry Berry | Improvements in Electric Safety Fuses. |
| US1501018A (en) * | 1919-07-08 | 1924-07-08 | Gen Electric | Electric-circuit protective device |
| US2017492A (en) * | 1934-03-24 | 1935-10-15 | John B Glowacki | Cartridge ferrule type refillable fuse and element |
| US3793560A (en) * | 1973-06-18 | 1974-02-19 | J Schultheis | Resistive thermal protective device for inductances |
| GB2096844A (en) * | 1981-04-10 | 1982-10-20 | Beswick Kenneth E Ltd | Electrical fuse |
| GB2182811B (en) * | 1985-11-08 | 1990-09-19 | Cooper Ind Inc | Time lag electrical fuse |
-
1989
- 1989-03-17 CH CH1003/89A patent/CH677419A5/de not_active IP Right Cessation
-
1990
- 1990-03-15 DE DE59008120T patent/DE59008120D1/en not_active Expired - Fee Related
- 1990-03-15 KR KR1019900702442A patent/KR920700464A/en not_active Application Discontinuation
- 1990-03-15 CA CA002028862A patent/CA2028862A1/en not_active Abandoned
- 1990-03-15 WO PCT/CH1990/000071 patent/WO1990011608A1/en active IP Right Grant
- 1990-03-15 HU HU902187A patent/HU208194B/en not_active IP Right Cessation
- 1990-03-15 AT AT90903752T patent/ATE116478T1/en active
- 1990-03-15 HU HU902187A patent/HUT56660A/en unknown
- 1990-03-15 ES ES90903752T patent/ES2070316T3/en not_active Expired - Lifetime
- 1990-03-15 BR BR909005961A patent/BR9005961A/en unknown
- 1990-03-15 AU AU51750/90A patent/AU640917B2/en not_active Ceased
- 1990-03-15 EP EP90903752A patent/EP0417223B1/en not_active Expired - Lifetime
- 1990-03-15 DK DK90903752.5T patent/DK0417223T3/en not_active Application Discontinuation
- 1990-03-15 JP JP2503870A patent/JPH03504783A/en active Pending
- 1990-11-15 RU SU904831816A patent/RU2036527C1/en active
- 1990-11-16 FI FI905680A patent/FI905680A0/en not_active IP Right Cessation
- 1990-11-16 NO NO90904973A patent/NO904973L/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| BR9005961A (en) | 1991-08-06 |
| KR920700464A (en) | 1992-02-19 |
| RU2036527C1 (en) | 1995-05-27 |
| ES2070316T3 (en) | 1995-06-01 |
| FI905680A0 (en) | 1990-11-16 |
| NO904973D0 (en) | 1990-11-16 |
| WO1990011608A1 (en) | 1990-10-04 |
| CA2028862A1 (en) | 1990-09-18 |
| HUT56660A (en) | 1991-09-30 |
| JPH03504783A (en) | 1991-10-17 |
| NO904973L (en) | 1990-11-16 |
| DE59008120D1 (en) | 1995-02-09 |
| DK0417223T3 (en) | 1995-04-03 |
| HU902187D0 (en) | 1991-08-28 |
| AU5175090A (en) | 1990-10-22 |
| HU208194B (en) | 1993-08-30 |
| ATE116478T1 (en) | 1995-01-15 |
| EP0417223A1 (en) | 1991-03-20 |
| CH677419A5 (en) | 1991-05-15 |
| AU640917B2 (en) | 1993-09-09 |
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