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EP0504464B1 - Switching device for interrupting a circuit - Google Patents

Switching device for interrupting a circuit Download PDF

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Publication number
EP0504464B1
EP0504464B1 EP91104458A EP91104458A EP0504464B1 EP 0504464 B1 EP0504464 B1 EP 0504464B1 EP 91104458 A EP91104458 A EP 91104458A EP 91104458 A EP91104458 A EP 91104458A EP 0504464 B1 EP0504464 B1 EP 0504464B1
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EP
European Patent Office
Prior art keywords
switching device
branch
circuit
contact point
current path
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
Application number
EP91104458A
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German (de)
French (fr)
Other versions
EP0504464A1 (en
Inventor
Johann Dr. Dipl.-Ing. Wolf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to AT91104458T priority Critical patent/ATE144077T1/en
Priority to DE59108267T priority patent/DE59108267D1/en
Priority to EP91104458A priority patent/EP0504464B1/en
Publication of EP0504464A1 publication Critical patent/EP0504464A1/en
Application granted granted Critical
Publication of EP0504464B1 publication Critical patent/EP0504464B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H79/00—Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H01H9/465—Shunt circuit closed by transferring the arc onto an auxiliary electrode

Definitions

  • the invention relates to a switching device for interrupting a circuit, wherein three-pole modules form the most diverse electrical single-pole and multi-pole devices, possibly with the addition of a neutral conductor path.
  • a three-pole module has a main current path with at least one contact point which can be switched by means of a tripping element or tripping elements and / or telecontrol devices and / or manual control element, possibly with the interposition of a switch lock.
  • the module also has a branch from the main current path, in which a current limiting device is arranged.
  • Such a module is the subject of an application with an older seniority (EP: 90 113 093.0).
  • Components or devices arranged downstream of the main current path are already protected against excessive current square time values during the switch-off process. This protection against overcurrent is particularly important in the event of a short circuit.
  • the transfer of excessively high currents to the branch relieves the facilities downstream of the main current path.
  • Circuit breakers which are designed to essentially interrupt the current, could only be provided with great effort in practice with stringent requirements for selectivity, but have so far not been satisfactory for many applications. In practice, one has reached technical limits when reducing the let-through current square time value, since neither much faster tripping and contact opening nor one substantial increase in the arc voltage to be built could be achieved with economically justifiable effort.
  • the invention has for its object to develop an arrangement for interrupting a circuit, which is simple and allows a further reduction in the current square time value.
  • the problem described is achieved by a switching device according to claim 1.
  • the switching device forms two connection sides, each of which forms a current path between two electrical poles on each connection side when the switch contacts are opened. Via the branch from the main current path, an input circuit and an output circuit can be connected to it, which are decoupled from each other when the switching device responds, so that part of the short-circuit energy from the supply circuit is directed past the load circuit to be protected. Since the switching device forms two connection sides in the event of a shutdown, both circuits are decoupled from one another at an early stage, as a result of which the supply of energy is prevented at an early stage. It is therefore only necessary to dissipate the energy already contained in the load circuit to be protected at this time. The energy reduction is supported by at least one current limiting device.
  • a linear resistor also a complex resistor - impedance -, a non-linear resistor, an arc quenching device or generally a device for building a counter voltage or a counter electromotive force, EMF, is suitable as the current limiting device. In particular, it can also be an arc extinguishing device.
  • a switching device for interrupting a circuit between a supply network and a load is known (US-A-2 924 752), the contact point of which can be opened with a trigger element or manual control element by means of a key switch, the switching device having two connection sides.
  • the current limiting device in the branch is made up of at least two arc extinguishing devices, at least one of which is arranged before and one after the contact point in the branches of the branch.
  • the contact point or contact arrangement can be designed such that it forms at least one interruption point, each of which has at least one movable contact.
  • the subclaims relate to advantageous configurations.
  • the switching device has a three-pole module 13 with a main current path 1 and a contact point 2.
  • a fork-shaped branch 7 leads from the main current path 1 in front of and behind the contact point 2 to a separate connection, the external connection 9 of the branch.
  • Current limiting devices 8 and 18, which can advantageously be designed as arc quenching devices, are arranged such that one is arranged before and one after the contact point 2 in a fork in the branch 7.
  • An input circuit 14 with inductance, active resistance and electromotive force, EMF can be connected between the input connection 12 of the main current path 1 and the external connection 9 of the branch.
  • An output circuit 15 with inductance and active resistance can be connected between the output connection 22 of the main current path 1 and the external connection 9 of the branch 7.
  • the output circuit 15 here represents a consumer network with several branches.
  • the switching device according to FIG. 2 shows another exemplary embodiment for the three-pole module 13.
  • a contact point 2 In the main current path 1 is a contact point 2, which as
  • Double interrupter is executed, arranged and the current limiting devices 8 and 18 are the stack of quenching plates of the two interrupter contacts of the double interrupter in the exemplary embodiment.
  • Such a construction is known in principle from contactors.
  • the connecting rail opposite the switching bridge is part of branch 7 here.
  • two arrangements 13, for example according to FIG. 1 or according to FIG. 2 are connected to one another with their separate connections 9 for the branches.
  • Different three-pole modules 13 can also be used, which is why the reference symbols of the connections only provide a systematic match give recognition.
  • An outer conductor can be connected to a main current path with the connections 12 and 22 and a further outer conductor can be connected to another main current path with the input connection 12 and the output connection 22.
  • the decoupling of the output circuit from the input circuit is ensured via the two current limiting devices 8 and via the two current limiting devices 18 of the two modules 13.
  • the connected arrangements 13 form an expanded switching device element 16.
  • each of the three modules 13 has its connection 9 for its branch 7 connected to a common connection branch 17 which has the connections 118 and 218.
  • the extended switching device element 19 can be connected with the connections 12 and 22 in a first outer conductor, in a second outer conductor and in a third outer conductor.
  • a neutral conductor can be connected to the common connection branch 17.
  • the extended switching device element 19 forms a so-called electrical four-pole device for three outer conductors and one neutral conductor.
  • a further contact point 20 is in the path for connecting a neutral conductor arranged, which cooperates with the contact point 2 in the module 13.
  • An additional current limiting element 21 is arranged in the path of the branch 7.
  • An enlarged switching device element 22 for an outer conductor and a neutral conductor is thereby obtained.
  • the switching device according to FIG. 6 results from the arrangement according to FIG. 3 by switching on an additional current limiting element 21 in the path of the branches 7.
  • the circuit device according to FIG. 7 can be derived from the circuit device according to FIG. 4 in that additional current limiting elements 21 are switched on in the paths of the branches 7 to the common connecting branch 17. If necessary, a further contact point 20 can be provided in the common connecting branch 17.

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  • Emergency Protection Circuit Devices (AREA)
  • Selective Calling Equipment (AREA)
  • Breakers (AREA)
  • Power Conversion In General (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

A switching device for interrupting a circuit, three-terminal modules (13) being able to form the highly different devices which electrically have one or more terminals, if required with the addition of a neutral conductor path. At least one contact point (2) is arranged in the three-terminal module (13) in a main current path (1). A branch (7) having a current-limiting device (8; 18) leads to a separate connection (9) from the main current path (1). The switching device forms two connection sides, for an input circuit (14) and for an output circuit (15), which, when the switch contacts of the contact point (2) are opened, in each case form a current path between two electrical terminals in each case on each of the connection sides. In consequence, decoupling of the input circuit (14) from the output circuit (15) is achieved when the switching device triggers, with separate energy conversion. <IMAGE>

Description

Die Erfindung bezieht sich auf eine Schalteinrichtung zur Unterbrechung eines Stromkreises, wobei dreipolige Module die verschiedenartigsten elektrisch einpoligen und mehrpoligen Einrichtungen bilden, gegebenenfalls unter Hinzufügung eines Neutralleiterpfades. Ein dreipoliges Modul weist einen Hauptstrompfad mit zumindest einer Kontaktstelle auf, die mittels Auslöseorgan oder Auslöseorganen und bzw. oder Fernwirkeinrichtungen und bzw. oder Handbetätigungsorgan, gegebenenfalls unter Zwischenschaltung eines Schaltschlosses, zu schalten ist. Das Modul weist weiter einen Abzweig vom Hauptstrompfad auf, in dem eine Strombegrenzungseinrichtung angeordnet ist. Ein derartiges Modul ist Gegenstand einer Anmeldung mit älterem Zeitrang (EP: 90 113 093.0).The invention relates to a switching device for interrupting a circuit, wherein three-pole modules form the most diverse electrical single-pole and multi-pole devices, possibly with the addition of a neutral conductor path. A three-pole module has a main current path with at least one contact point which can be switched by means of a tripping element or tripping elements and / or telecontrol devices and / or manual control element, possibly with the interposition of a switch lock. The module also has a branch from the main current path, in which a current limiting device is arranged. Such a module is the subject of an application with an older seniority (EP: 90 113 093.0).

Dem Hauptstrompfad nachgeordnete Bauelemente oder Einrichtungen werden schon während des Abschaltvorgangs gegen zu hohe Stromquadrat-Zeit-Werte geschützt. Dieser Schutz gegen Überstrom kommt insbesondere im Kurzschlußfall zum Tragen. Die Überleitung zu hoher Ströme auf den Abzweig entlastet die dem Hauptstrompfad nachgeordneten Einrichtungen.Components or devices arranged downstream of the main current path are already protected against excessive current square time values during the switch-off process. This protection against overcurrent is particularly important in the event of a short circuit. The transfer of excessively high currents to the branch relieves the facilities downstream of the main current path.

Die Stromunterbrechung durch einen Schutzschalter, dem Verbraucherzweige mit weiteren Schutzschaltern nachgeordnet sind, kann im Zusammenhang mit den Bemühungen zur Strombegrenzung gesehen werden.The current interruption by a circuit breaker, which is followed by consumer branches with further circuit breakers, can be seen in connection with the efforts to limit the current.

Schutzschalter, die darauf abgestellt sind, im wesentlichen den Strom zu unterbrechen, konnten bei strenger Anforderung an die Selektivität in der Praxis nur mit hohem Aufwand und dennoch für viele Anwendungsfälle bisher nicht befriedigend zur Verfügung gestellt werden. So ist man in der Praxis bei der Verminderung des durchgelassenen Stromquadrat-Zeit-Wertes an technisch bedingte Grenzen gelangt, da weder eine wesentlich schnellere Auslösung und Kontaktöffnung noch eine wesentliche Erhöhung der aufzubauenden Lichtbogenspannung mit wirtschaftlich vertretbarem Aufwand zu erreichen war.Circuit breakers, which are designed to essentially interrupt the current, could only be provided with great effort in practice with stringent requirements for selectivity, but have so far not been satisfactory for many applications. In practice, one has reached technical limits when reducing the let-through current square time value, since neither much faster tripping and contact opening nor one substantial increase in the arc voltage to be built could be achieved with economically justifiable effort.

Der Erfindung liegt die Aufgabe zugrunde, eine Anordnung zur Unterbrechung eines Stromkreises zu entwickeln, die einfach aufgebaut ist und eine weitere Reduzierung des Stromquadrat-Zeit-Wertes ermöglicht. Die Lösung der geschilderten Aufgabe erfolgt durch eine Schalteinrichtung nach Patentanspruch 1.The invention has for its object to develop an arrangement for interrupting a circuit, which is simple and allows a further reduction in the current square time value. The problem described is achieved by a switching device according to claim 1.

Die Schalteinrichtung bildet zwei Anschlußseiten, die beim Öffnen der Schaltkontakte jeweils einen Strompfad zwischen zwei elektrischen Polen auf jeder Anschlußseite bilden. Über den Abzweig vom Hauptstrompfad kann mit diesem jeweils ein Eingangskreis und ein Ausgangskreis angeschlossen werden, die beim Ansprechen der Schalteinrichtung gegeneinander entkoppelt werden, so daß ein Teil der Kurzschlußenergie aus dem Speisekreis am zu schützenden Lastkreis vorbeigeleitet wird. Da die Schalteinrichtung im Abschaltfall zwei Anschlußseiten bildet, werden beide Kreise früh voneinander entkoppelt, wodurch die Nachlieferung von Energie frühzeitig unterbunden wird. Es ist daher nur noch die zu diesem Zeitpunkt im zu schützenden Lastkreis bereits enthaltene Energie abzubauen. Unterstützt wird der Energieabbau durch zumindest eine Strombegrenzungseinrichtung. Als Strombegrenzungseinrichtung eignet sich ein linearer Widerstand, auch ein komplexer Widerstand - Impedanz -, ein nichtlinearer Widerstand, eine Lichtbogenlöscheinrichtung oder allgemein eine Einrichtung zum Aufbau einer Gegenspannung bzw. einer gegenelektromotorischen Kraft, EMK. Sie kann insbesondere auch eine Lichtbogenlöscheinrichtung sein.The switching device forms two connection sides, each of which forms a current path between two electrical poles on each connection side when the switch contacts are opened. Via the branch from the main current path, an input circuit and an output circuit can be connected to it, which are decoupled from each other when the switching device responds, so that part of the short-circuit energy from the supply circuit is directed past the load circuit to be protected. Since the switching device forms two connection sides in the event of a shutdown, both circuits are decoupled from one another at an early stage, as a result of which the supply of energy is prevented at an early stage. It is therefore only necessary to dissipate the energy already contained in the load circuit to be protected at this time. The energy reduction is supported by at least one current limiting device. A linear resistor, also a complex resistor - impedance -, a non-linear resistor, an arc quenching device or generally a device for building a counter voltage or a counter electromotive force, EMF, is suitable as the current limiting device. In particular, it can also be an arc extinguishing device.

Es ist eine Schalteinrichtung zur Unterbrechung eines Stromkreises zwischen einem Versorgungsnetz und einer Last bekannt (US-A-2 924 752), deren Kontaktstelle mit Auslöseorgan oder Handbetätigungsorgan mittels eines Schaltschlosses geöffnet werden kann, wobei die Schalteinrichtung zwei Anschlußseiten aufweist. Dreipolige Module mit entsprechenden Merkmalen liegen hierbei nicht vor. Bei mehrphasiger Anordnung in Sternschaltung sind Dämpfungswiderstände vorgesehen. Insbesondere fehlen jedoch besondere dreipolige Module mit gabelförmigen Abzweigungen, wobei die Gabelungsenden vor bzw. hinter der Kontaktstelle angeschlossen wären.A switching device for interrupting a circuit between a supply network and a load is known (US-A-2 924 752), the contact point of which can be opened with a trigger element or manual control element by means of a key switch, the switching device having two connection sides. There are no three-pole modules with corresponding features. With multi-phase arrangement Damping resistors are provided in a star connection. In particular, however, special three-pole modules with fork-shaped branches are missing, the fork ends being connected in front of or behind the contact point.

Nach einer Weiterbildung ist die Strombegrenzungseinrichtung im Abzweig aus zumindest zwei Lichtbogenlöscheinrichtungen ausgeführt, von denen zumindest je eine vor und eine nach der Kontaktstelle in den Gabelungen des Abzweigs angeordnet ist.According to a further development, the current limiting device in the branch is made up of at least two arc extinguishing devices, at least one of which is arranged before and one after the contact point in the branches of the branch.

Die Kontaktstelle bzw. Kontaktanordnung kann so ausgeführt sein, daß sie mindestens eine Unterbrechungsstelle bildet, die jeweils mindestens einen beweglichen Kontakt aufweist. Die Unteransprüche beziehen sich auf vorteilhafte Ausgestaltungen.The contact point or contact arrangement can be designed such that it forms at least one interruption point, each of which has at least one movable contact. The subclaims relate to advantageous configurations.

Von mehreren dreipoligen Modulen kann jeweils ihr Abzweig zu einem gemeinsamen Anschlußzweig für einen Neutralleiter zusammengeführt sein. Man erhält dann eine Schalteinrichtung für eine der Anzahl der Module entsprechende Anzahl von Außenleitern und für einen zusätzlichen Neutralleiter.From several three-pole modules, their branches can each be brought together to form a common connection branch for a neutral conductor. A switching device is then obtained for a number of outer conductors corresponding to the number of modules and for an additional neutral conductor.

Die Erfindung soll nun anhand von in der Zeichnung grob schematisch wiedergegebenen Ausführungsbeispielen näher erläutert werden:

In FIG 1
ist der prinzipielle Aufbau eines bevorzugten Ausführungsbeispiels dargestellt, wobei das Modul in einen Eingangs- und in einen Ausgangskreis eingeschaltet ist.
In FIG 2
ist ein anderes Ausführungsbeispiel für die Schalteinrichtung veranschaulicht.
In FIG 3
ist ein Ausführungsbeispiel für eine symmetrische Schalteinrichtung für zwei Außenleiter bei verbundenen Abzweigen dargestellt.
In FIG 4
ist ein Ausführungsbeispiel der Schalteinrichtung für drei Außenleiter und für einen Neutralleiter wiedergegeben.
In FIG 5
ist eine Schalteinrichtung für einen Außenleiter und für einen geschalteten Neutralleiter bei zusätzlichem Strombegrenzungselement im Abzweig dargestellt.
In FIG 6
ist die symmetrische Schalteinrichtung nach Figur 3 für zwei Außenleiter und bei zusätzlichem Strombegrenzungselement in den verbundenen Abzweigen wiedergegeben.
In FIG 7
ist eine Schalteinrichtung nach Figur 4 bei zusätzlichen Strombegrenzungselementen in Abzweigen von drei Modulen dargestellt.
The invention will now be explained in more detail with reference to exemplary embodiments shown roughly schematically in the drawing:
In FIG. 1
the basic structure of a preferred embodiment is shown, the module being switched into an input and an output circuit.
In FIG. 2
another embodiment of the switching device is illustrated.
In FIG. 3
An embodiment of a symmetrical switching device for two outer conductors with connected branches is shown.
In FIG. 4
is an embodiment of the switching device for three outer conductors and for a neutral conductor reproduced.
5
is a switching device for an outer conductor and for a switched neutral conductor with an additional current limiting element in the branch.
6
3 shows the symmetrical switching device according to FIG. 3 for two outer conductors and with an additional current limiting element in the connected branches.
In FIG. 7
4 shows a switching device according to FIG. 4 with additional current limiting elements in branches of three modules.

Die Schalteinrichtung nach Figur 1 weist ein dreipoliges Modul 13 mit einem Hauptstrompfad 1 und einer Kontaktstelle 2 auf. Vom Hauptstrompfad 1 führt ein gabelförmiger Abzweig 7 vor und hinter der Kontaktstelle 2 zu einem gesonderten Anschluß, dem externen Anschluß 9 des Abzweigs. Strombegrenzungseinrichtungen 8 und 18, die vorteilhafterweise als Lichtbogenlöscheinrichtungen ausgeführt sein können, sind so angeordnet, daß je eine vor und eine nach der Kontaktstelle 2 in einer Gabelung des Abzweigs 7 angeordnet ist. Zwischen dem Eingangsanschluß 12 des Hauptstrompfades 1 und dem externen Anschluß 9 des Abzweigs kann ein Eingangskreis 14 mit Induktivität, Wirkwiderstand und elektromotorischer Kraft, EMK, angeschlossen sein. Zwischen dem Ausgangsanschluß 22 des Hauptstrompfades 1 und dem externen Anschluß 9 des Abzweiges 7 kann ein Ausgangskreis 15 mit Induktivität und Wirkwiderstand angeschlossen sein. Der Ausgangskreis 15 steht hier stellvertretend für ein Verbrauchernetz mit mehreren Zweigen.The switching device according to FIG. 1 has a three-pole module 13 with a main current path 1 and a contact point 2. A fork-shaped branch 7 leads from the main current path 1 in front of and behind the contact point 2 to a separate connection, the external connection 9 of the branch. Current limiting devices 8 and 18, which can advantageously be designed as arc quenching devices, are arranged such that one is arranged before and one after the contact point 2 in a fork in the branch 7. An input circuit 14 with inductance, active resistance and electromotive force, EMF, can be connected between the input connection 12 of the main current path 1 and the external connection 9 of the branch. An output circuit 15 with inductance and active resistance can be connected between the output connection 22 of the main current path 1 and the external connection 9 of the branch 7. The output circuit 15 here represents a consumer network with several branches.

Die Schalteinrichtung nach Figur 2 gibt ein anderes Ausführungsbeispiel für das dreipolige Modul 13 wieder. Im Hauptstrompfad 1 ist eine Kontaktstelle 2, die alsThe switching device according to FIG. 2 shows another exemplary embodiment for the three-pole module 13. In the main current path 1 is a contact point 2, which as

Doppelunterbrecher ausführt ist, angeordnet und die Strombegrenzungseinrichtungen 8 und 18 sind im Ausführungsbeispiel die Löschblechstapel der beiden Unterbrecherkontakte des Doppelunterbrechers ein derartiger Aufbau ist prinzipiell von Schaltschützen hinlänglich bekannt. Die Verbindungsschiene gegenüber der Schaltbrücke ist hier jedoch Teil des Abzweigs 7.Double interrupter is executed, arranged and the current limiting devices 8 and 18 are the stack of quenching plates of the two interrupter contacts of the double interrupter in the exemplary embodiment. Such a construction is known in principle from contactors. However, the connecting rail opposite the switching bridge is part of branch 7 here.

Im Ausführungsbeispiel nach Figur 3 sind zwei Anordnungen 13, beispielsweise nach Figur 1 oder nach Figur 2, mit ihren gesonderten Anschlüssen 9 für die Abzweige miteinander verbunden.Es können auch verschiedenartige dreipolige Module 13 verwendet werden, weshalb die Bezugszeichen der Anschlüsse lediglich eine systematische Übereinstimmung zu erkennen geben. An einem Hauptstrompfad mit den Anschlüssen 12 und 22 kann ein Außenleiter und an einem anderen Hauptstrompfad mit dem Eingangsanschluß 12 und dem Ausgangsanschluß 22 ein weiterer Außenleiter angeschlossen werden. Die Entkopplung des Ausgangskreises vom Eingangskreis ist über die beiden Strombegrenzungseinrichtungen 8 und über die beiden Strombegrenzungseinrichtungen 18 der beiden Module 13 gewährleistet. Die verbundenen Anordnungen 13 bilden dabei ein erweitertes Schalteinrichtungselement 16.In the exemplary embodiment according to FIG. 3, two arrangements 13, for example according to FIG. 1 or according to FIG. 2, are connected to one another with their separate connections 9 for the branches. Different three-pole modules 13 can also be used, which is why the reference symbols of the connections only provide a systematic match give recognition. An outer conductor can be connected to a main current path with the connections 12 and 22 and a further outer conductor can be connected to another main current path with the input connection 12 and the output connection 22. The decoupling of the output circuit from the input circuit is ensured via the two current limiting devices 8 and via the two current limiting devices 18 of the two modules 13. The connected arrangements 13 form an expanded switching device element 16.

Im Ausführungsbeispiel nach Figur 4 sind von drei Modulen 13 jeweils ihr Anschluß 9 für ihren Abzwei 7 mit einem gemeinsamen Anschlußzweig 17 verbunden, der die Anschlüsse 118 und 218 aufweist. Das erweiterte Schalteinrichtungselement 19 kann mit den Anschlüssen 12 und 22 jeweils in einen ersten Außenleiter, in einen zweiten Außenleiter und in einen dritten Außenleiter eingeschaltet werden. Am gemeinsamen Anschlußzwei 17 kann ein Neutralleiter angeschlossen werden. Das erweiterte Schalteinrichtungselement 19 bildet ein sogenanntes elektrisch vierpoliges Gerät für drei Außenleiter und einen Neutralleiter.In the exemplary embodiment according to FIG. 4, each of the three modules 13 has its connection 9 for its branch 7 connected to a common connection branch 17 which has the connections 118 and 218. The extended switching device element 19 can be connected with the connections 12 and 22 in a first outer conductor, in a second outer conductor and in a third outer conductor. A neutral conductor can be connected to the common connection branch 17. The extended switching device element 19 forms a so-called electrical four-pole device for three outer conductors and one neutral conductor.

Im Ausführungsbeispiel nach Figur 5 ist im Pfad für den Anschluß eines Neutralleiters eine weitere Kontaktstelle 20 angeordnet, die mit der Kontaktstelle 2 im Modul 13 zusammenarbeitet. Ein zusätzliches Strombegrenzungselement 21 ist im Pfad des Abzweigs 7 angeordnet. Man erhält dadurch ein erweitertes Schalteinrichtungselement 22 für einen Außenleiter und einen Neutralleiter.In the exemplary embodiment according to FIG. 5, a further contact point 20 is in the path for connecting a neutral conductor arranged, which cooperates with the contact point 2 in the module 13. An additional current limiting element 21 is arranged in the path of the branch 7. An enlarged switching device element 22 for an outer conductor and a neutral conductor is thereby obtained.

Die Schalteinrichtung nach Figur 6 ergibt sich aus der Anordnung nach Figur 3 durch Einschalten eines zusätzlichen Strombegrenzungselements 21 im Pfad der Abzweige 7.The switching device according to FIG. 6 results from the arrangement according to FIG. 3 by switching on an additional current limiting element 21 in the path of the branches 7.

Die Schaltungseinrichtung nach Figur 7 läßt sich aus der Schaltungseinrichtung nach Figur 4 dadurch ableiten, daß in den Pfaden der Abzweige 7 zum gemeinsamen Anschlußzweig 17 zusätzliche Strombegrenzungselemente 21 eingeschaltet werden. Im gemeinsamen Anschlußzweig 17 kann im Bedarfsfall eine weitere Kontaktstelle 20 vorgesehen sein.The circuit device according to FIG. 7 can be derived from the circuit device according to FIG. 4 in that additional current limiting elements 21 are switched on in the paths of the branches 7 to the common connecting branch 17. If necessary, a further contact point 20 can be provided in the common connecting branch 17.

Claims (5)

  1. Switching device for interrupting a circuit,
    - wherein there is arranged at least one three-pole module (13) which has a main current path (1) with at least one contact point (2) which can be switched by means of at least one tripping element or manually operated element, if applicable with interconnection of a latching mechanism;
    - wherein the switching device has two terminal ends (14, 15) so that when the contact point (2) is opened, one current path between two electric poles is formed per terminal end;
    - wherein the three-pole module or three-pole modules each has or have a forked branch (7), which with its fork ends is connected upstream and downstream of the contact point (2), with the forks each having a current-limiting device (8; 18).
  2. Switching device according to claim 1,
    characterised in that the current-limiting devices (8; 18) in the forks of the branch (7) are realized as at least two arc-quenching devices.
  3. Switching device according to claim 1 or 2,
    characterised in that the branches (7) of a plurality of modules (13) are each brought out to electrically homopolar terminals (17).
  4. Switching device according to claim 1 or 2,
    characterised in that two three-pole modules (13) are linked with their branches (7) and each form, with their other two poles, two electrical terminals at each terminal end.
  5. Switching device according to one of the claims 2 to 4, characterised in that an additional current-limiting element (21) is arranged in the line section of a branch (7).
EP91104458A 1991-03-21 1991-03-21 Switching device for interrupting a circuit Expired - Lifetime EP0504464B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT91104458T ATE144077T1 (en) 1991-03-21 1991-03-21 SWITCHING DEVICE FOR INTERRUPTING A CIRCUIT
DE59108267T DE59108267D1 (en) 1991-03-21 1991-03-21 Switching device for interrupting a circuit
EP91104458A EP0504464B1 (en) 1991-03-21 1991-03-21 Switching device for interrupting a circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91104458A EP0504464B1 (en) 1991-03-21 1991-03-21 Switching device for interrupting a circuit

Publications (2)

Publication Number Publication Date
EP0504464A1 EP0504464A1 (en) 1992-09-23
EP0504464B1 true EP0504464B1 (en) 1996-10-09

Family

ID=8206557

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91104458A Expired - Lifetime EP0504464B1 (en) 1991-03-21 1991-03-21 Switching device for interrupting a circuit

Country Status (3)

Country Link
EP (1) EP0504464B1 (en)
AT (1) ATE144077T1 (en)
DE (1) DE59108267D1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2924752A (en) * 1957-07-12 1960-02-09 Ite Circuit Breaker Ltd Combined circuit breaker and short circuiter
FR2582857B1 (en) * 1985-05-29 1989-04-28 Merlin Gerin SINGLE POLE AND NEUTRAL CIRCUIT BREAKER WITH SHUNT EFFECT

Also Published As

Publication number Publication date
DE59108267D1 (en) 1996-11-14
EP0504464A1 (en) 1992-09-23
ATE144077T1 (en) 1996-10-15

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