EP0088297B1 - Fuse, especially a low-voltage power fuse - Google Patents

Fuse, especially a low-voltage power fuse Download PDF

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Publication number
EP0088297B1
EP0088297B1 EP83101818A EP83101818A EP0088297B1 EP 0088297 B1 EP0088297 B1 EP 0088297B1 EP 83101818 A EP83101818 A EP 83101818A EP 83101818 A EP83101818 A EP 83101818A EP 0088297 B1 EP0088297 B1 EP 0088297B1
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EP
European Patent Office
Prior art keywords
housing
fuse
contact member
contact
front plate
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
Application number
EP83101818A
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German (de)
French (fr)
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EP0088297A2 (en
EP0088297A3 (en
Inventor
Erwin Geiger
Albert Seger
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Siemens AG
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Siemens AG
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Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT83101818T priority Critical patent/ATE35594T1/en
Publication of EP0088297A2 publication Critical patent/EP0088297A2/en
Publication of EP0088297A3 publication Critical patent/EP0088297A3/en
Application granted granted Critical
Publication of EP0088297B1 publication Critical patent/EP0088297B1/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/143—Electrical contacts; Fastening fusible members to such contacts
    • H01H85/153—Knife-blade-end contacts

Definitions

  • the invention relates to an electrical fuse link, in particular NH fuse link according to the preamble of claim 1.
  • a fuse is known (DE-C-1638141), which consists of a tubular housing made of insulating material with mounted cover plates. A prefabricated unit consisting of two contact blades and this fusible link is inserted and locked in the tubular housing. A button-shaped collar attached to the base of a contact knife prevents the fuse element from being pulled out of the housing. The contact knife is displaced radially outwards a few millimeters so that a nose attached to it lies narrowly on the edge of the housing. On the opposite side of the contact knife, one of the cover plates of the housing engages in a recess in the contact knife. This prevents the contact knife from sliding back into the interior of the housing. However, it is necessary to mount the contact knife and the cover plate of the housing in one step.
  • the shoulders extend in the fusible conductor level.
  • the object of the invention is to develop an electrical fuse link, in particular an NH fuse link, in which the locking of the contact blades on the housing is improved and at the same time the assembly of the contact blades is simplified.
  • a first end plate on the base of a first contact knife has formations which interlock positively with corresponding counter-formations of the housing.
  • a second end plate on the base of a second contact knife, which lies opposite the first contact knife, is provided with formations in such a way that it already rests on supports on the housing in a centered position. This enables the structure to be further simplified.
  • the second end plate at the base of the second contact knife can be made so wide that it rests on an annular support surface on the housing. It is possible to use housings without ribs, which simplifies the manufacture of the housing and allows the assembly of contact blades and fusible link to be introduced more quickly and easily.
  • the sliding back of a contact knife into the housing can be prevented by inserting at least one pin into recesses in the end faces of the housing, on which the second end plate already lies in a centered position on the base of the second contact knife on the housing.
  • Pins are already known for locking contact blades (DE-B-1 001 386). Bores in the contact blades receive the pins there, which can only prevent the contact blades from being pulled out of the housing. They do not protect against being pushed in.
  • the pins in the fuse link according to the invention prevent, according to one embodiment, that the contact blades can be pushed back into the housing.
  • This pin advantageously has a small profile compared to the contact knife in order to reduce the heat dissipation by welding spots when welding the fuse element. It does not serve to lock the contact knife, as is the case with the known fuse (DE-B-1 638141) described above by the button-shaped collar.
  • Contact knife, end plate and pin can be formed in one piece, whereby the contact resistance of the fuse is reduced.
  • the end plate can have recesses which increase its surface area.
  • the end plates of the fuse do not need to be live and can therefore be made of molded material. There are then no live grip tabs so that an operator is protected.
  • the fuse link according to the invention can be produced in a simple manner essentially from a finished fuse housing made of ceramic, from end plates and from a prefabricated unit contact knife fuse element.
  • the unit consisting of contact blades, end plates and fusible conductor, is supported by contact surfaces on the edges of the end faces of the fuse housing and locked by the end plates to be screwed on.
  • the contact blade is mounted with the end plate on the end face of the housing in the fuse link according to the invention. This simplifies production and results in a flat and more secure circulation.
  • FIG. 1 an embodiment of the fuse link according to the invention is shown in an exploded view.
  • a second end plate is so large that it is in a centered position on an annular.
  • Contact surface of the housing rests.
  • FIG. 2 A further embodiment of the fuse link according to the invention is illustrated in FIG. 2.
  • a sliding of an end plate with the contact knife into the housing is prevented except by its contact surfaces by pins which are located in recesses in the end faces of the housing between the end plate and the housing.
  • the tubular housing 1 according to FIG. 1 is made of insulating material and encloses an axially inserted fusible conductor 2, which has a contact knife 31 or 32 at its ends.
  • the contact blades 31, 32 which are located outside the housing 1, have end plates 16 and 14 on their base. After the contact knife has been radially displaced, the end plate 16 rests on the edge of the housing 1.
  • An annular support surface 5 on the edge of the through openings in the end face 6 of the housing 1 forms a support for the molding 73 of the second contact knife 32.
  • the face plate 16 of the first contact knife has formations 71. These are essentially oval with groove-shaped recesses 20. They interlock positively with a counter-molding 81 of the housing 1, which is a further-developed oval with a rib 21.
  • the lower, first end plate 16 can be guided past the rib 21 when it is installed in the housing 1. After the contact knife 31 has been displaced, the end plate 1'6 finds a second flat support on the rib 21 and the counter-molding.
  • End plates 9 and 10 which are screwed onto the end faces 6 of the housing 1, press the end plates 14 and 16 against the bearing surfaces 5 at the edge of the housing 1, lock the contact blades 31 and 32.
  • the end plates 9 and 10 have openings for the contact blades and one Auxiliary fuse wire 11. So they do not need to be live and can therefore consist of molded material.
  • the end plates 9 can also be formed in the usual way as seals made of asbestos or asbestos-like material.
  • Pins 13 are formed between the end plates 14 and 16 and the fuse element 2, respectively. These advantageously have a smaller profile than the contact blades, as a result of which one or more fusible conductors 2 can be easily welded to the pin 13. Contact knives 31 and 32, end plate 4 and pin 13 can be made from one piece by mechanical deformation.
  • the second end plate 14 has an essentially oval shape 73 without a groove-shaped recess 20. It is so large that it rests only in a centered position on the annular support surface 5.
  • the unit of contact blades 31, 32 end plates 16, 14 and fuse element 2 is in the Ge. installed at home from above.
  • the fuse element 2 is overstretched and then the first end plate 16 is displaced radially so that it rests on the rib 21.
  • the second end plate 17 according to FIG. 2 has an essentially oval shape 74 and lies on pins 18 in addition to the annular contact surface 5. These are only inserted after the installation of the unit comprising contact blades 31, 32, end plates 17, 22 and fusible conductor 2 in recesses in the end face 6 of the housing 1, so that they bridge the housing opening.
  • the first end plate 22 has an essentially oval shape 72. It engages with an oval counter-shape 82 of the housing 1 and, in the radially displaced position, lies flat on supports at the edge of the housing.

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  • Fuses (AREA)
  • Road Signs Or Road Markings (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Description

Die Erfindung bezieht sich auf einen elektrischen Sicherungseinsatz, insbesondere NH-Sicherungseinsatz nach Gattungsbegriff von Patentanspruch 1.The invention relates to an electrical fuse link, in particular NH fuse link according to the preamble of claim 1.

Um einen hohen Mechanisierungsgrad bei der Montage zu erzielen, wird gerne auf Schraub-und Schweißverbindungen verzichtet, die einen hohen Zeitaufwand erfordern.In order to achieve a high degree of mechanization during assembly, screw and welded connections, which require a great deal of time, are often dispensed with.

Es ist eine Schmelzsicherung bekannt (DE-C-1638141), die aus einem röhrenförmigen Gehäuse aus Isolierstoff mit aufmontierten Deckplatten besteht. Eine vorgefertigte Einheit aus zwei Kontaktmessern und diese verbindende Schmelzleiter wird in das röhrenförmige Gehäuse eingeführt und arretiert. Hierbei verhindert ein an der Basis eines Kontaktmessers angebrachter knopfförmiger Bund ein Herausziehen der Schmelzleiter aus dem Gehäuse. Das Kontaktmesser wird wenige Millimeter radial nach außen versetzt, so daß eine an ihm angebrachte Nase schmal auf dem Gehäuserand aufliegt. An der gegenüberliegenden Seite des Kontaktmessers greift eine der Deckplatten des Gehäuses in eine Ausnehmung im Kontaktmesser ein. So wird verhindert, daß das Kontaktmesser in das Innere des Gehäuses zurückgleitet. Dabei ist es allerdings notwendig, das Kontaktmesser und die Deckplatte des Gehäuses in einem Arbeitsgang zu montieren.A fuse is known (DE-C-1638141), which consists of a tubular housing made of insulating material with mounted cover plates. A prefabricated unit consisting of two contact blades and this fusible link is inserted and locked in the tubular housing. A button-shaped collar attached to the base of a contact knife prevents the fuse element from being pulled out of the housing. The contact knife is displaced radially outwards a few millimeters so that a nose attached to it lies narrowly on the edge of the housing. On the opposite side of the contact knife, one of the cover plates of the housing engages in a recess in the contact knife. This prevents the contact knife from sliding back into the interior of the housing. However, it is necessary to mount the contact knife and the cover plate of the housing in one step.

Bei einem anderen bekannten Sicherungseinsatz (US-A-1 790 713) liegt ein Verbund aus Schmelzleiter mit Kontaktmessern beiderseits nach radialer Verlagerung in einem Gehäuse auf Schultern von Abschlußkappen auf.In another known fuse link (US-A-1 790 713), a composite of fusible conductors with contact blades lies on both sides after a radial displacement in a housing on shoulders of end caps.

Die Schultern erstrecken sich dabei in der Ebene des Schmelzleiters.The shoulders extend in the fusible conductor level.

ber Erfindung liegt die Aufgabe zugrunde, einen elektrischen Sicherungseinsatz, insbesondere NH-Sicherungseinsatz zu entwickeln, bei dem die Arretierung der Kontaktmesser am Gehäuse verbessert und zugleich die Montage der Kontaktmesser vereinfacht ist.The object of the invention is to develop an electrical fuse link, in particular an NH fuse link, in which the locking of the contact blades on the housing is improved and at the same time the assembly of the contact blades is simplified.

Diese Aufgabe wird erfindungsgemäß durch eine Sicherung nach Anspruch 1 mit den kennzeichnenden Merkmalen gelöst.This object is achieved by a fuse according to claim 1 with the characterizing features.

Danach weist eine erste Stirnplatte an der Basis eines ersten Kontaktmessers Ausformungen auf, die mit entsprechenden Gegenausformungen des Gehäuses formschlüssig ineinandergreifen. Nach Einfügen der Einheit aus Kontaktmesser, Stirnplatte und Schmelzleiter wird das erste Kontaktmesser radial verlagert, so daß die erste Stirnplatte sich beispielsweise auf einer Rippe und auf Auflageflächen abstützen kann, die in der Öffnung am Gehäuse vorhanden sind. Diese Konstruktion verhindert ein Zurückgleiten in das Innere des Gehäuses. Danach können Abschlußplatten, die die Stirnplatte gegen die Auflageflächen andrücken, auf die Stirnseite des Gehäuses geschraubt werden. Dadurch ist das erste Kontaktmesser auch gegen Herausheben gesichert und fest arretiert.According to this, a first end plate on the base of a first contact knife has formations which interlock positively with corresponding counter-formations of the housing. After inserting the unit comprising the contact knife, end plate and fuse element, the first contact knife is displaced radially, so that the first end plate can be supported, for example, on a rib and on contact surfaces which are present in the opening on the housing. This construction prevents sliding back into the interior of the housing. Then end plates, which press the end plate against the bearing surfaces, can be screwed onto the end face of the housing. As a result, the first contact knife is also secured against being lifted out and firmly locked.

Eine zweite Stirnplatte an der Basis eines zweiten Kontaktmessers, das dem ersten Kontaktmesser gegenüberliegt, ist mit Ausformungen derart versehen, daß sie schon in einer zentrierten Position an Auflagen am Gehäuse aufliegt. Das ermöglicht eine weitere Vereinfachung des Aufbaus.A second end plate on the base of a second contact knife, which lies opposite the first contact knife, is provided with formations in such a way that it already rests on supports on the housing in a centered position. This enables the structure to be further simplified.

Die zweite Stirnplatte an der Basis des zweiten Kontaktmesser kann so breit ausgebildet sein, daß sie an einer ringförmigen Auflagefläche am Gehäuse aufliegt. Dabei kann man Gehäuse ohne Rippen verwenden, was die Gehäuseherstellung erleichtert und es erlaubt, die Baueinheit aus Kontaktmessern und Schmelzleiter schneller und leichter einzuführen. Das Zurückgleiten eines Kontaktmessers in das Gehäuse kann dadurch verhindert werden, daß in Ausnehmungen in den Stirnseiten des Gehäuses zumindest ein Stift eingelegt wird, an dem die zweite Stirnplatte an der Basis des zweiten Kontaktmessers am Gehäuse schon in einer zentrierten Position aufliegt.The second end plate at the base of the second contact knife can be made so wide that it rests on an annular support surface on the housing. It is possible to use housings without ribs, which simplifies the manufacture of the housing and allows the assembly of contact blades and fusible link to be introduced more quickly and easily. The sliding back of a contact knife into the housing can be prevented by inserting at least one pin into recesses in the end faces of the housing, on which the second end plate already lies in a centered position on the base of the second contact knife on the housing.

Zur Arretierung von Kontaktmessern sind Stifte bereits bekannt (DE-B-1 001 386). Bohrungen in den Kontaktmessern nehmen dort die Stifte auf, die lediglich verhindern können, daß die Kontaktmesser aus dem Gehäuse herausgezogen werden. Sie schützen nicht gegen Hineindrücken.Pins are already known for locking contact blades (DE-B-1 001 386). Bores in the contact blades receive the pins there, which can only prevent the contact blades from being pulled out of the housing. They do not protect against being pushed in.

Demgegenüber verhindern die Stifte beim Sicherungseinsatz nach der Erfindung nach einer Ausführungsform, daß die Kontaktmesser in das Gehäuse zurückgedrückt werden können.In contrast, the pins in the fuse link according to the invention prevent, according to one embodiment, that the contact blades can be pushed back into the housing.

Es ist günstig, jeweils an der Stirnplatte an der zum Kontaktmesser gegenüberliegenden Seite einen Zapfen auszubilden. Dieser Zapfen hat vorteilhafterweise im Vergleich zum Kontaktmesser ein kleines Profil, um die Wärmeabfuhr beim Anschweißen des Schmelzleiters durch Schweißpunkte zu vermindern. Er dient nicht der Arretierung des Kontaktmessers, wie es dagegen bei der eingangs geschilderten, bekannten Sicherung (DE-B-1 638141) durch den knopfförmigen Bund der Fall ist.It is advantageous to form a pin on the end plate on the side opposite the contact knife. This pin advantageously has a small profile compared to the contact knife in order to reduce the heat dissipation by welding spots when welding the fuse element. It does not serve to lock the contact knife, as is the case with the known fuse (DE-B-1 638141) described above by the button-shaped collar.

Kontaktmesser, Stirnplatte und Zapfen können einstückig ausgebildet sein, wodurch der Übergangswiderstand der Sicherung verringert wird. Um eine größere Zahl von Schmelzleitern anzubringen, kann die Stirnplatte Ausnehmungen aufweisen, die deren Oberfläche vergrößern.Contact knife, end plate and pin can be formed in one piece, whereby the contact resistance of the fuse is reduced. In order to attach a larger number of fusible conductors, the end plate can have recesses which increase its surface area.

Die Abschlußplatten der Sicherung brauchen nicht stromführend zu sein und können daher aus Formstoff gefertigt sein. Es sind dann keine spannungsführenden Grifflaschen vorhanden, so daß eine Bedienungsperson geschützt ist.The end plates of the fuse do not need to be live and can therefore be made of molded material. There are then no live grip tabs so that an operator is protected.

Der Sicherungseinsatz nach der Erfindung läßt sich in einfacher Weise im wesentlichen aus einem fertigen Sicherungsgehäuse aus Keramik, aus Abschlußplatten und aus einer vorgefertigten Baueinheit Kontaktmesser-Schmelzleiter herstellen. Die Einheit, bestehend aus Kontaktmessern, Stirnplatten und Schmelzleiter, wird von Auflageflächen an Rändern der Stirnseiten des Sicherungsgehäuses gestützt und von den zu verschraubenden Abschlußplatten arretiert. Während bei der oben geschilderten bekannten Schmelzsicherung (DE-B-1 638141) die Stirnseite des Gehäuses in eine Nut des Kontaktmessers eingefügt werden muß, lagert beim Sicherungseinsatz nach der Erfindung das Kontaktmesser mit der Stirnplatte auf der Stirnseite des Gehäuses. Das vereinfacht die Fertigung und ergibt eine flächigere und sicherere Auflage.The fuse link according to the invention can be produced in a simple manner essentially from a finished fuse housing made of ceramic, from end plates and from a prefabricated unit contact knife fuse element. The unit, consisting of contact blades, end plates and fusible conductor, is supported by contact surfaces on the edges of the end faces of the fuse housing and locked by the end plates to be screwed on. While in the known Schmelzsi cherung (DE-B-1 638141) the end face of the housing has to be inserted into a groove of the contact blade, the contact blade is mounted with the end plate on the end face of the housing in the fuse link according to the invention. This simplifies production and results in a flat and more secure circulation.

Die Erfindung soll anhand von in der Zeichnung grob schematisch wiedergegebenen Ausführungsbeispielen näher erläutert werden :The invention will be explained in greater detail on the basis of exemplary embodiments shown roughly schematically in the drawing:

In Fig. 1 ist in Explosionsdarstellung eine erfindungsgemäße Ausführungsform des Sicherungseinsatzes wiedergegeben. Eine zweite Stirnplatte ist so groß, daß sie in einer zentrierten Position an einer ringförmigen. Auflagelfäche des Gehäuses aufliegt.In Fig. 1, an embodiment of the fuse link according to the invention is shown in an exploded view. A second end plate is so large that it is in a centered position on an annular. Contact surface of the housing rests.

In Fig. 2 ist eine weitere erfindungsgemäße Ausführungsform des Sicherungseinsatzes veranschaulicht. Hier wird ein Abgleiten einer Stirnplatte mit dem Kontaktmesser in das Gehäuse außer durch dessen Auflageflächen durch Stifte verhindert, die in Ausnehmungen in den Stirnseiten des Gehäuses zwischen Stirnplatte und dem Gehäuse liegen.A further embodiment of the fuse link according to the invention is illustrated in FIG. 2. Here, a sliding of an end plate with the contact knife into the housing is prevented except by its contact surfaces by pins which are located in recesses in the end faces of the housing between the end plate and the housing.

Das rohrförmige Gehäuse 1 nach Fig. 1 ist aus Isolierstoff gefertigt und umschließt einen axial eingeführten Schmelzleiter 2, der an seinen Enden jeweils ein Kontaktmesser 31 bzw. 32 aufweist.The tubular housing 1 according to FIG. 1 is made of insulating material and encloses an axially inserted fusible conductor 2, which has a contact knife 31 or 32 at its ends.

Die Kontaktmesser 31, 32, die sich außerhalb des Gehäuses 1 befinden, weisen an ihrer Basis Stirnplatten 16 bzw. 14 auf. Die Stirnplatte 16 liegt nach radialer Verlagerung des Kontaktmessers, auf dem Rand des Gehäuses 1 auf.The contact blades 31, 32, which are located outside the housing 1, have end plates 16 and 14 on their base. After the contact knife has been radially displaced, the end plate 16 rests on the edge of the housing 1.

Eine ringförmige Auflagefläche 5 am Rand der Durchführungsöffnungen in der Stirnseite 6 des Gehäuses 1 bildet für die Anformung 73 des zweiten Kontaktmessers 32 eine Auflage. Die Stirnplatte 16 des ersten Kontaktmessers weist Ausformungen 71 auf. Diese sind im wesentlichen oval mit nutenförmigen Ausnehmungen 20. Sie greifen formschlüssig mit einer Gegenausformung 81 des Gehäuses 1 ineinander, die ein weiter ausgebildetes Oval mit einer Rippe 21 ist.An annular support surface 5 on the edge of the through openings in the end face 6 of the housing 1 forms a support for the molding 73 of the second contact knife 32. The face plate 16 of the first contact knife has formations 71. These are essentially oval with groove-shaped recesses 20. They interlock positively with a counter-molding 81 of the housing 1, which is a further-developed oval with a rib 21.

Wegen der nutenförmigen Ausnehmungen 20 kann die untere, erste Stirnplatte 16 beim Einbau in das Gehäuse 1 an der Rippe 21 vorbeigeführt werden. Nach der Verlagerung des Kontaktmessers 31 findet die Stirnplatte 1'6 auf der Rippe 21 und der Gegenausformung eine zweite flächige Auflage.Because of the groove-shaped recesses 20, the lower, first end plate 16 can be guided past the rib 21 when it is installed in the housing 1. After the contact knife 31 has been displaced, the end plate 1'6 finds a second flat support on the rib 21 and the counter-molding.

Abschlußplatten 9 und 10, die auf die Stirnseiten 6 des Gehäuses 1 geschraubt, die Stirnplatten 14 und 16 gegen die Auflageflächen 5 am Rand des Gehäuses 1 pressen, arretieren die Kontaktmesser 31 und 32. Die Abschlußplatten 9 und 10 weisen Öffnungen für die Kontaktmesser und einen Hilfsschmelzdraht 11 auf. Sie brauchen also nicht spannungsführend zu sein und können daher aus Formstoff bestehen. Das Gleiche gilt für die Grifflaschen 12, die Teile der äußeren Abschlußplatten 10 sind. Die Abschlußplatten 9 können auch in üblicher Weise als Dichtungen aus Asbest bzw. asbestähnlichem Material ausgebildet sein.End plates 9 and 10, which are screwed onto the end faces 6 of the housing 1, press the end plates 14 and 16 against the bearing surfaces 5 at the edge of the housing 1, lock the contact blades 31 and 32. The end plates 9 and 10 have openings for the contact blades and one Auxiliary fuse wire 11. So they do not need to be live and can therefore consist of molded material. The same applies to the handle straps 12, which are parts of the outer end plates 10. The end plates 9 can also be formed in the usual way as seals made of asbestos or asbestos-like material.

Zwischen den Stirnplatten 14 bzw. 16 und dem Schmelzleiter 2 sind jeweils Zapfen 13 ausgebildet. Diese haben vorteilhafterweise ein kleineres Profil als die Kontaktmesser, wodurch ein oder mehrere Schmelzleiter 2 am Zapfen 13 leicht angeschweißt werden können. Kontaktmesser 31 und 32, Stirnplatte 4 und Zapfen 13 lassen sich durch mechanische Verformung aus einem Stück fertigen.Pins 13 are formed between the end plates 14 and 16 and the fuse element 2, respectively. These advantageously have a smaller profile than the contact blades, as a result of which one or more fusible conductors 2 can be easily welded to the pin 13. Contact knives 31 and 32, end plate 4 and pin 13 can be made from one piece by mechanical deformation.

Die zweite Stirnplatte 14 weist eine im wesentlichen ovale Ausformung 73 ohne nutenförmige Ausnehmung 20 auf. Sie ist so groß ausgebildet, daß sie in einer zentrierten Position nur auf der ringförmigen Auflagefläche 5 aufliegt.The second end plate 14 has an essentially oval shape 73 without a groove-shaped recess 20. It is so large that it rests only in a centered position on the annular support surface 5.

Die Einheit aus Kontaktmessern 31, 32 Stirnplatten 16, 14 und Schmelzleiter 2 wird in das Ge- . hause von oben her eingebaut. Wenn die zweite Stirnplatte 14 auf der Auflagefläche 5 aufliegt, wird der Schmelzleiter 2 überdehnt und dann die erste Stirnplatte 16 radial verlagert, so daß sie auf der Rippe 21 aufliegt.The unit of contact blades 31, 32 end plates 16, 14 and fuse element 2 is in the Ge. installed at home from above. When the second end plate 14 rests on the support surface 5, the fuse element 2 is overstretched and then the first end plate 16 is displaced radially so that it rests on the rib 21.

Die zweite Stirnplatte 17 nach Fig. 2 hat eine im wesentlichen ovale Ausformung 74 und liegt außer auf der ringförmigen Auflagefläche 5 auf Stiften 18 auf. Diese werden erst nach dem Einbau der Einheit aus Kontaktmessern 31, 32, Stirnplatten 17, 22 und Schmelzleiter 2 in Ausnehmungen in der Stirnseite 6 des Gehäuses 1 eingelegt, so daß sie die Gehäuseöffnung überbrücken.The second end plate 17 according to FIG. 2 has an essentially oval shape 74 and lies on pins 18 in addition to the annular contact surface 5. These are only inserted after the installation of the unit comprising contact blades 31, 32, end plates 17, 22 and fusible conductor 2 in recesses in the end face 6 of the housing 1, so that they bridge the housing opening.

Wenn die zweite Stirnplatte 17 auf der Auflagefläche 5 und den Stiften 18 aufliegt, wird der Schmelzleiter 2 überdehnt und dann die erste Stirnplatte 22 radial verlagert.When the second end plate 17 rests on the support surface 5 and the pins 18, the fuse element 2 is overstretched and then the first end plate 22 is displaced radially.

Die erste Stirnplatte 22 weist eine im wesentlichen ovale Ausformung 72 auf. Sie greift mit einer ovalen Gegenausformung 82 des Gehäuses 1 ineinander und liegt in der radial verlagerten Position am Gehäuserand an Auflagen flächig auf.The first end plate 22 has an essentially oval shape 72. It engages with an oval counter-shape 82 of the housing 1 and, in the radially displaced position, lies flat on supports at the edge of the housing.

Claims (8)

1. Electrical fuse-link, more particularly low- voltage high-breaking-capacity fuse-link with a tubular housing (1) made of insulating material, the contact members (31, 32) and fuse-element (2) of which are introduced axially and are supported by projections of the contact members (31, 32), in each case, on an edge of the housing (1), with end plates (9, 10) securing the contact members (31, 32), characterised in that a first front plate (16, 22) at the base of a first contact member (31) is provided with protruding portions (71, 72), which interlock in a form-fitting manner with corresponding counter protruding portions (81, 82) of the housing (1), and is supported in a planar manner in a radially displaced position on the housing edge on supports and in that a second front plate (14,17) at the base of a second contact member (32), which lies opposite the first . contact member (31), is provided with protruding portions (73, 74) in such a way that it is supported in a centered position on supports (5, 18) on the housing (1).
2. Electrical fuse-link according to. claim 1, characterised in that the second front plate (14) at the base of the second contact member (32) is formed so that it is sufficiently wide to be supported on an annular supporting surface (5) on the housing (1).
3. Electrical fuse-link according to claim 1, characterised in that inserted into recesses in the faces (6) of the housing (1) there is at least one pin (18) on which the second front plate (17) at the base of the second contact member (32) is supported on the housing (1).
4. Electrical fuse-link according to claim 1, characterised in that the first front plate (16) at the base of the first contact member (31) has a groove-shaped recess (20) guided on ribs (21) of the housing (1).
5. Electrical fuse-link according to claim 1, characterised in that a protruding element (13) is formed on the front plate (16, 22, 14, 17) on the side opposite the contact member (31, 32).
6. Electrical fuse-link according to claim 5, characterised in that contact member (31, 32), front plate (16, 22, 14, 17) and protruding element (13) are, in each case, formed in one piece.
7. Electrical fuse-link according to claim 6, characterised in that the profile of the protruding element (13) is smaller than that of the contact member (31, 32).
8. Electrical fuse-link according to one of the claims 1 to 7, characterised in that the end plates (9, 10) are made of moulded material.
EP83101818A 1982-03-10 1983-02-24 Fuse, especially a low-voltage power fuse Expired EP0088297B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101818T ATE35594T1 (en) 1982-03-10 1983-02-24 FUSE, ESPECIALLY NH FUSE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823208667 DE3208667A1 (en) 1982-03-10 1982-03-10 FUSE FUSE, PARTICULARLY NH FUSE
DE3208667 1982-03-10

Publications (3)

Publication Number Publication Date
EP0088297A2 EP0088297A2 (en) 1983-09-14
EP0088297A3 EP0088297A3 (en) 1985-07-10
EP0088297B1 true EP0088297B1 (en) 1988-07-06

Family

ID=6157850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101818A Expired EP0088297B1 (en) 1982-03-10 1983-02-24 Fuse, especially a low-voltage power fuse

Country Status (12)

Country Link
EP (1) EP0088297B1 (en)
AR (1) AR229197A1 (en)
AT (1) ATE35594T1 (en)
BR (1) BR8301189A (en)
CS (1) CS257763B2 (en)
DE (2) DE3208667A1 (en)
DK (1) DK161923C (en)
ES (2) ES278106Y (en)
GR (1) GR78507B (en)
IN (1) IN158606B (en)
NO (1) NO161026C (en)
PT (1) PT76358B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2630584B1 (en) * 1988-04-20 1995-07-13 Legrand Sa CARTRIDGE OF KNIVES WITH FUSED BAR WELDED OUTSIDE THE MELTING CHAMBER
DE3930381C2 (en) * 1989-09-12 1994-03-24 Mueller Jean Gmbh NH fuse link

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1790713A (en) * 1931-02-03 op pittsburgh
US1788877A (en) * 1928-03-23 1931-01-13 Great Western Fuse Company Renewable fuse
US2077823A (en) * 1932-09-21 1937-04-20 James M Magee Refillable blade fuse
DE684361C (en) * 1937-04-29 1939-11-27 Aeg Closed fuse cartridge
DE721967C (en) * 1940-09-10 1942-06-25 Elektrotechnische Spezialfabri Low-voltage high-performance fuse with contact plug-in elements
AT266965B (en) * 1967-02-16 1968-12-10 Schneider Schaltgeraete Fuse
FR1600751A (en) * 1968-12-17 1970-07-27
DE7414273U (en) * 1974-04-24 1974-07-25 Mueller J Ohg NH fuse link with tension-free grip lugs

Also Published As

Publication number Publication date
ES281122U (en) 1985-02-16
DK113983D0 (en) 1983-03-09
NO161026C (en) 1989-06-21
ES278106U (en) 1985-02-16
DK161923C (en) 1992-02-10
PT76358B (en) 1986-08-28
AR229197A1 (en) 1983-06-30
GR78507B (en) 1984-09-27
ES278106Y (en) 1986-05-16
CS160483A2 (en) 1987-09-17
EP0088297A2 (en) 1983-09-14
IN158606B (en) 1986-12-20
NO161026B (en) 1989-03-13
ES281122Y (en) 1988-06-16
DE3377310D1 (en) 1988-08-11
DE3208667A1 (en) 1983-09-22
DK161923B (en) 1991-08-26
NO830132L (en) 1983-09-12
ATE35594T1 (en) 1988-07-15
DK113983A (en) 1983-09-11
EP0088297A3 (en) 1985-07-10
CS257763B2 (en) 1988-06-15
BR8301189A (en) 1983-11-22
PT76358A (en) 1983-04-01

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