EP1164615B1 - Multipole circuit breaker - Google Patents

Multipole circuit breaker Download PDF

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Publication number
EP1164615B1
EP1164615B1 EP00112615A EP00112615A EP1164615B1 EP 1164615 B1 EP1164615 B1 EP 1164615B1 EP 00112615 A EP00112615 A EP 00112615A EP 00112615 A EP00112615 A EP 00112615A EP 1164615 B1 EP1164615 B1 EP 1164615B1
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EP
European Patent Office
Prior art keywords
pole
pen
conductor
circuit breaker
neutral
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
EP00112615A
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German (de)
French (fr)
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EP1164615A1 (en
Inventor
Anton Dipl.-Ing. Glas
Johann Dr. Wolf
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Siemens AG
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Siemens AG
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Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to EP00112615A priority Critical patent/EP1164615B1/en
Priority to DE50014137T priority patent/DE50014137D1/en
Priority to PT00112615T priority patent/PT1164615E/en
Priority to AT00112615T priority patent/ATE356421T1/en
Priority to ES00112615T priority patent/ES2280161T3/en
Publication of EP1164615A1 publication Critical patent/EP1164615A1/en
Application granted granted Critical
Publication of EP1164615B1 publication Critical patent/EP1164615B1/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor
    • H01H2071/004—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor with a tripping or current sensing device in the neutral wire, e.g. for third harmonics in a three fase system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/1009—Interconnected mechanisms
    • H01H2071/1036—Interconnected mechanisms having provisions for four or more poles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/002—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00 with provision for switching the neutral conductor

Definitions

  • the invention relates to a multi-pole circuit breaker for a polyphase network (multi-conductor network) with neutral conductor (N-conductor) or with combined neutral and protective conductor (PEN conductor).
  • polyphase network multi-conductor network
  • N-conductor neutral conductor
  • PEN conductor neutral and protective conductor
  • phase currents by, for example, 50%.
  • these measures are already highly undesirable because of their ineffectiveness.
  • the invention is therefore based on the object to provide a multi-pole circuit breaker, which allows avoiding the disadvantages mentioned safe protection of the neutral or the combined protection and neutral.
  • a corresponding multi-pole circuit breaker is provided in which the pole in principle has no point of interruption, via which the N-conductor or PEN conductor is connected and its current leads.
  • this N- or PEN-pole recognizes by means of appropriate current detection organs an impermissible overcurrent and causes via a coupling with the phase poles their release.
  • the N or PEN pole therefore includes one with the respective turn-off device of the other phase poles Coupled tripping device that does not switch the N- or PEN-pole or without interruption. In the case of overload of the N or PEN conductor, the phase poles, but not the N or PEN pole are thus separated.
  • the N pole or PEN pole with regard to its structure is basically the same as the other phase poles. Due to the identical parts concept, this considerably reduces the manufacturing outlay.
  • the switching contact of the turn-off device of the N or PEN pole is bridged by means of, for example, a piece of wire. This ensures that even in the event of tripping in case of overload of the N- or PEN conductor this remains uninterrupted.
  • the coupling of the tripping and / or turn-off of both the phase poles and the N- or PEN-pole is thus a reliable protection of the N- or PEN conductor, without disconnecting it from the network.
  • the conductor cross sections used can be used to the maximum.
  • standard assemblies and components can also be used for the N or PEN pole.
  • switching contact is permanently closed.
  • a switching lock provided as well as the other poles is then not coupled to this switching contact of the N or PEN pole, while this switching lock is coupled to the switching locks of the remaining poles of the circuit breaker.
  • the advantages achieved by the invention are in particular that by means of a multi-pole circuit breaker or protective switching device, in particular a circuit breaker, in which a the neutral conductor or the combined protection and neutral associated N- or PEN pole, although direct or indirect triggering mechanisms, even but does not disconnect, a reliable protection by switching off the other phase currents is effected.
  • the protective effect with respect to the neutral conductor or the combined Protected and neutral conductor maintained by overloaded and thus in the event of tripping the N or PEN pole unswitched or disconnected without interruption or as a result of bridging an existing switching contact.
  • the multi-pole circuit breaker is therefore particularly suitable for multi-conductor networks in which the neutral conductor is to be protected but not switched, e.g. for 2- and 3-pole circuit breakers. It is also suitable as a tripping device in the N or PEN pole of a circuit breaker with increased or reduced tripping values with correspondingly adapted conductor cross sections, e.g. for cables with half neutral cross section.
  • the multi-pole circuit breaker 1 for a three-phase system with the phase or outer conductors L1 to L3 and the neutral conductor N. or the combined protective and neutral conductor PEN has per pole P1 to P4 a triggering device with an electromagnetic release 2 and a thermal release 3 and a shutdown device with a switching contact 4 and a switching mechanism 5 on.
  • the N- or PEN-pole P4 according to the embodiment of FIG 1 has a parallel to the switching contact 4 arranged bridging element 6, z. B. a wire or wire bridge, on.
  • the N or PEN pole P4 has no switching contact.
  • a switching contact may also be provided, which is then permanently closed.
  • the corresponding switching mechanism 5 of this pole P4 is then mechanically not coupled to the permanently closed switching contact.
  • the switching locks 5 of the poles P1 to P4 are on the one hand coupled with each other, which is indicated by the dashed line of action 7.
  • the switching locks 5 with the triggers 2 and / or 3 are mechanically coupled, which is indicated by the dashed lines of action 8.
  • the switching locks 5 are coupled to the respective switching contact 4.
  • PEN pole detected by means of the thermal release 3 for overload and / or by means of the electromagnetic release 2 for short circuit, and coupled in this pole P4 with the triggers 2.3 switching mechanism 5 is triggered.
  • the triggering of the switching mechanism 5 of the N- or PEN pole P4 causes due to the coupling of the triggering device 2,3 with the turn-off 4.5 of the phase poles a release of the remaining phase poles P1 to P4, so that their switching contacts 4 are opened and a shutdown from the network L n .
  • the PEN or N pole P4 of the circuit breaker 1 according to FIG 2 only protective or trip device, while this pole P4 itself is not switched.
  • the essential component of the non-switched or uninterrupted N- or PEN-pole P4 is therefore the tripping device 2,3 for current detection and forwarding of the trigger signal to the coupled with this pole P4 phase poles P1 to P3.
  • the invention according to FIG 1 offers the advantage that in the local multi-pole circuit breaker 1 virtually identical switching devices or poles P1 to P4 can be used.
  • the pole P4 to be connected to the neutral conductor N or to the combined protective and neutral conductor PEN is to be provided with the element 6 for bridging its switching contact 4.

Abstract

The circuit breaker has a triggering device (2,3) coupled to the N pole associated with the neutral conductor or a PEN pole associated with the neutral and earth conductor of a switch-off device (4,5) for the phase pole or poles (P1-P3). The triggering device switches the N or PEN pole (P4) with or without disconnection. The N or PEN pole has a switch-off device with a bridged switch contact.

Description

Die Erfindung bezieht sich auf einen mehrpoligen Schutzschalter für ein mehrphasiges Netz (Mehrleiternetz) mit Neutralleiter (N-Leiter) oder mit kombiniertem Neutral- und Schutzleiter (PEN-Leiter).The invention relates to a multi-pole circuit breaker for a polyphase network (multi-conductor network) with neutral conductor (N-conductor) or with combined neutral and protective conductor (PEN conductor).

In mehrphasigen Netzen, z. B. in einem Drehstromnetz, mit hohem Oberwellengehalt kann eine Überlastung des Neutralleiters auftreten. So wurde festgestellt, dass durch den zunehmenden Anteil von elektronisch geregelten Geräten, wie beispielsweise Computer- oder PC-Netzteile, auch der Oberwellenanteil im entsprechenden Netz ansteigt. Während bei unverzerrten sinusförmigen Strömen im Neutralleiter die Stromsumme stets Null ergibt, erfolgt bei der dritten Oberwelle eine Addition der über die Phasenleitungen des Netzes fließenden Außenleiterströme. Dieser Oberwellenanteil wiederum kann dazu führen, dass der Neutralleiterstrom das √3-fache oder 1,7-fache des Außenleiterstroms erreichen oder übersteigen kann.In multi-phase networks, z. B. in a three-phase network, high harmonic content may overload the neutral occur. It has been found that the increasing proportion of electronically controlled devices, such as computer or PC power supplies, also increases the harmonic content in the corresponding network. While with undistorted sinusoidal currents in the neutral conductor, the current sum always equals zero, an addition of the outer conductor currents flowing via the phase lines of the network occurs at the third harmonic. In turn, this harmonic content can cause the neutral current to reach or exceed √3 times or 1.7 times the outer conductor current.

Überstromschutzeinrichtungen in Form sogenannter Schutzschalter in den Außenleitern sind daher in Extremfällen nicht in der Lage, den Neutralleiter zu schützen. Demzufolge kann dieser bei unzulässig hohen Belastungsströmen thermisch zerstört werden, obwohl in den Phasen- oder Außenleitern die zulässigen Nennströme nicht überschritten werden. In solchen Fällen ist eine allpolige Absicherung erforderlich.Overcurrent protective devices in the form of so-called circuit breakers in the outer conductors are therefore not able to protect the neutral conductor in extreme cases. As a result, it can be thermally destroyed in the case of impermissibly high load currents, although the permissible rated currents are not exceeded in the phase or phase conductors. In such cases, all-pole protection is required.

Handelt es sich um reine Neutralleiter, so wird durch den Einsatz eines geschützten Pols, z.B. eines vierpoligen Leitungsschutz- oder Leitungsschalters, eine thermische Überlastung des an den N-Pol angeschlossenen Neutralleiters (N-Leiter) sicher abgeschaltet. Demgegenüber ist eine Abschaltung oder Auftrennung eines kombinierten Schutz- und Neutralleiters (PEN-Leiter) aus Sicherheitsgründen unzulässig. Auch dürfen in manchen Netzen die Neutralleiter nicht geschaltet werden.In the case of pure neutral conductors, the use of a protected pole, eg a four-pole circuit breaker or line breaker, safely switches off thermal overloading of the neutral conductor (N conductor) connected to the N pole. In contrast, a shutdown or separation of a combined protective and neutral conductor (PEN conductor) for safety reasons is inadmissible. Also In some networks, the neutral conductors must not be switched.

Zur Lösung dieses Problems ist es möglich, die Phasenströme um beispielsweise 50% zu reduzieren. Eine derartige Reduzierung der Phasenströme mit der Folge vergleichsweise kleiner Bemessungsströme beim Überstromschutzorgan als für die Leitung zulässig, bedeuten aber eine ineffektive Nutzung des Leiterquerschnitts. Auch ist denkbar, den Leiterquerschnitt des Neutralleiters bzw. des kombinierten Schutz- und Neutralleiters zu vergrößern. Diese Maßnahmen sind jedoch bereits aufgrund deren Ineffektivität äußerst unerwünscht.To solve this problem, it is possible to reduce the phase currents by, for example, 50%. Such a reduction of the phase currents with the consequence of comparatively small rated currents in the overcurrent protective device as permissible for the line, but mean an ineffective use of the conductor cross-section. It is also conceivable to increase the conductor cross-section of the neutral conductor or of the combined protective and neutral conductor. However, these measures are already highly undesirable because of their ineffectiveness.

Aus der US 5,729,421 A ist ein mehrpoliger Schutzschalter für ein mehrphasiges Netz mit einem Neutralleiter bekannt. Der im Neutralleiter fließende Strom wird mittels eines Ringkern-Wandlers erfasst und ausgewertet. Im Überlastfall veranlasst eine Auslöseeinrichtung ein Öffnen der Schaltkontakte in den drei Phasenleitern. Im Neutralleiter ist dagegen kein zu öffnender Schaltkontakt vorgesehen.From US 5,729,421 A a multi-pole circuit breaker for a multi-phase network with a neutral conductor is known. The current flowing in the neutral conductor is detected and evaluated by means of a toroidal core transformer. In case of overload causes a triggering device opening the switch contacts in the three phase conductors. In the neutral conductor, however, no openable switching contact is provided.

Der Erfindung liegt daher die Aufgabe zugrunde, einen mehrpoligen Schutzschalter anzugeben, der unter Vermeidung der genannten Nachteile einen sicheren Schutz auch des Neutralleiters bzw. des kombinierten Schutz- und Neutralleiters ermöglicht.The invention is therefore based on the object to provide a multi-pole circuit breaker, which allows avoiding the disadvantages mentioned safe protection of the neutral or the combined protection and neutral.

Diese Aufgabe wird erfindungsgemäß gelöst durch die Merkmale des Anspruchs 1. Dazu ist für ein mehrphasiges Netz ein entsprechend mehrpoliger Schutzschalter vorgesehen, bei dem derjenige Pol prinzipiell keine Unterbrechungsstelle aufweist, über den der N-Leiter bzw. PEN-Leiter angeschlossen ist und der dessen Strom führt. Dieser N- bzw. PEN-Pol erkennt jedoch mittels entsprechender Stromerfassungsorgane einen unzulässigen Überstrom und bewirkt über eine Kopplung mit den Phasenpolen deren Auslösung. Der N- bzw. PEN-Pol umfasst daher eine mit der jeweiligen Abschalteinrichtung der weiteren Phasenpole gekoppelte Auslöseeinrichtung, die den N- bzw. PEN-Pol nicht oder unterbrechungsfrei schaltet. Im Überlastfall des N- oder PEN-Leiters werden somit die Phasenpole, nicht aber der N- bzw. PEN-Pol aufgetrennt.This object is achieved by the features of claim 1. For a multi-phase network, a corresponding multi-pole circuit breaker is provided in which the pole in principle has no point of interruption, via which the N-conductor or PEN conductor is connected and its current leads. However, this N- or PEN-pole recognizes by means of appropriate current detection organs an impermissible overcurrent and causes via a coupling with the phase poles their release. The N or PEN pole therefore includes one with the respective turn-off device of the other phase poles Coupled tripping device that does not switch the N- or PEN-pole or without interruption. In the case of overload of the N or PEN conductor, the phase poles, but not the N or PEN pole are thus separated.

Dabei ist der N- bzw. PEN-Pol hinsichtlich dessen Aufbaus grundsätzlich den übrigen Phasenpolen gleich. Dies verringert aufgrund des Gleichteilekonzeptes den fertigungstechnischen Aufwand erheblich. In diesem Fall ist in vorteilhafter Ausgestaltung vorgesehen, dass der Schaltkontakt der Abschalteinrichtung des N- bzw. PEN-Pols mittels beispielsweise eines Drahtstückes überbrückt ist. Dadurch wird erreicht, dass auch im Auslösefalle bei Überlast des N- bzw. PEN-Leiters dieser unterbrechungsfrei bleibt. Infolge der Kopplung der Auslöse- und/oder Abschalteinrichtungen sowohl der Phasenpole als auch des N- bzw. PEN-Pols erfolgt somit ein zuverlässiger Schutz des N- bzw. PEN-Leiters, ohne diesen vom Netz zu trennen. Dadurch können die verwendeten Leiterquerschnitte maximal genutzt werden. Außerdem können Standardbaugruppen und -komponenten auch für den N- bzw. PEN-Pol verwendet werden.In this case, the N pole or PEN pole with regard to its structure is basically the same as the other phase poles. Due to the identical parts concept, this considerably reduces the manufacturing outlay. In this case, it is provided in an advantageous embodiment that the switching contact of the turn-off device of the N or PEN pole is bridged by means of, for example, a piece of wire. This ensures that even in the event of tripping in case of overload of the N- or PEN conductor this remains uninterrupted. As a result of the coupling of the tripping and / or turn-off of both the phase poles and the N- or PEN-pole is thus a reliable protection of the N- or PEN conductor, without disconnecting it from the network. As a result, the conductor cross sections used can be used to the maximum. In addition, standard assemblies and components can also be used for the N or PEN pole.

Es kann auch eine Variante vorgesehen sein, bei der der Schaltkontakt dauerhaft geschlossen ist. Ein ebenso wie bei den anderen Polen vorgesehenes Schaltschloss ist dann mit diesem Schaltkontakt des N- bzw. PEN-Pols nicht gekoppelt, während dieses Schaltschloss mit den Schaltschlössern der übrigen Pole des Schutzschalters gekoppelt ist.It can also be provided a variant in which the switching contact is permanently closed. A switching lock provided as well as the other poles is then not coupled to this switching contact of the N or PEN pole, while this switching lock is coupled to the switching locks of the remaining poles of the circuit breaker.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass mittels eines mehrpoligen Schutzschalters oder Schutzschaltgerätes, insbesondere eines Leitungsschutzschalters, bei dem ein dem Neutralleiter oder dem kombinierten Schutz- und Neutralleiter zugeordneter N- bzw. PEN-Pol zwar direkte oder indirekte Auslösemechanismen aufweist, selbst aber nicht trennt, ein zuverlässiger Schutz durch Ausschalten der übrigen Phasenströme bewirkt wird. Dabei wird die Schutzwirkung bezüglich des Neutralleiters bzw. des kombinierten Schutz- und Neutralleiters aufrechterhalten, indem bei Überlast und somit im Auslösefall der N- oder PEN-Pol ungeschaltet oder infolge der Überbrückung eines vorhandenen Schaltkontaktes unterbrechungsfrei oder unterbrechungslos geschaltet wird.The advantages achieved by the invention are in particular that by means of a multi-pole circuit breaker or protective switching device, in particular a circuit breaker, in which a the neutral conductor or the combined protection and neutral associated N- or PEN pole, although direct or indirect triggering mechanisms, even but does not disconnect, a reliable protection by switching off the other phase currents is effected. Here, the protective effect with respect to the neutral conductor or the combined Protected and neutral conductor maintained by overloaded and thus in the event of tripping the N or PEN pole unswitched or disconnected without interruption or as a result of bridging an existing switching contact.

Der mehrpolige Schutzschalter eignet sich daher insbesondere für Mehrleiternetze, in denen der neutrale Leiter geschützt, aber nicht geschaltet werden soll, z.B. für 2- und 3-polige Schutzschalter. Er eignet sich auch als Auslöseeinrichtung im N- bzw. PEN-Pol eines Schutzschalters mit erhöhten oder erniedrigten Auslösewerten bei entsprechend angepassten Leiterquerschnitten, z.B. für Leitungen mit halbem Neutralleiterquerschnitt.The multi-pole circuit breaker is therefore particularly suitable for multi-conductor networks in which the neutral conductor is to be protected but not switched, e.g. for 2- and 3-pole circuit breakers. It is also suitable as a tripping device in the N or PEN pole of a circuit breaker with increased or reduced tripping values with correspondingly adapted conductor cross sections, e.g. for cables with half neutral cross section.

Nachfolgend wird Ausführungsbeispiel der Erfindung anhand einer Zeichnung näher erläutert. Darin zeigen:

FIG 1
schematisch einen vierpoligen Schutzschalter eines Dreiphasennetzes mit gebrücktem Schaltkontakt im N-bzw. PEN-Pol, und
FIG 2
einen nicht die Erfindung betreffenden mehrpoligen Schutzschalter mit einem schaltkontaktlosen N- bzw. PEN-Pol.
Embodiment of the invention will be explained in more detail with reference to a drawing. Show:
FIG. 1
schematically a four-pole circuit breaker of a three-phase network with bridged switching contact in the N and. PEN pole, and
FIG. 2
a non-inventive multi-pole circuit breaker with a switchless contact N or PEN pole.

Einander entsprechende Teile sind in beiden Figuren mit den gleichen Bezugszeichen versehen.Corresponding parts are provided in both figures with the same reference numerals.

Der mehrpolige Schutzschalter 1 für ein Drehstromnetz mit den Phasen- oder Außenleitern L1 bis L3 und dem Neutralleiter N bzw. dem kombinierten Schutz- und Neutralleiter PEN weist je Pol P1 bis P4 eine Auslöseeinrichtung mit einem elektromagnetischen Auslöser 2 und einem thermischen Auslöser 3 sowie eine Abschalteinrichtung mit einem Schaltkontakt 4 und einem Schaltschloss 5 auf. Der N- bzw. PEN-Pol P4 gemäß der Ausführungsform nach FIG 1 weist ein parallel zum Schaltkontakt 4 angeordnetes Überbrückungselement 6, z. B. eine Leiter- oder Drahtbrücke, auf.The multi-pole circuit breaker 1 for a three-phase system with the phase or outer conductors L1 to L3 and the neutral conductor N. or the combined protective and neutral conductor PEN has per pole P1 to P4 a triggering device with an electromagnetic release 2 and a thermal release 3 and a shutdown device with a switching contact 4 and a switching mechanism 5 on. The N- or PEN-pole P4 according to the embodiment of FIG 1 has a parallel to the switching contact 4 arranged bridging element 6, z. B. a wire or wire bridge, on.

Bei dem nicht unter die Erfindung fallenden Schalter gemäß FIG 2 weist der N- bzw. PEN-Pol P4 keinen Schaltkontakt auf. Alternativ kann jedoch ebenfalls ein Schaltkontakt vorgesehen sein, wobei dieser dann dauerhaft geschlossen ist. Das entsprechende Schaltschloss 5 dieses Pols P4 ist mit dem dauerhaft geschlossenen Schaltkontakt dann mechanisch nicht gekoppelt.In the case of the switch according to FIG. 2 which does not fall under the invention, the N or PEN pole P4 has no switching contact. Alternatively, however, a switching contact may also be provided, which is then permanently closed. The corresponding switching mechanism 5 of this pole P4 is then mechanically not coupled to the permanently closed switching contact.

Die Schaltschlösser 5 der Pole P1 bis P4 sind einerseits untereinander gekoppelt, was durch die gestrichelte Wirkungslinie 7 angedeutet ist. Andererseits sind die Schaltschlösser 5 mit den Auslösern 2 und/oder 3 mechanisch gekoppelt, was durch die gestrichelten Wirkungslinien 8 angedeutet ist. Ferner sind bei den Phasenpolen P1 bis P3 die Schaltschlösser 5 mit dem jeweiligen Schaltkontakt 4 gekoppelt.The switching locks 5 of the poles P1 to P4 are on the one hand coupled with each other, which is indicated by the dashed line of action 7. On the other hand, the switching locks 5 with the triggers 2 and / or 3 are mechanically coupled, which is indicated by the dashed lines of action 8. Furthermore, in the case of the phase poles P1 to P3, the switching locks 5 are coupled to the respective switching contact 4.

Im Überlastfall des Neutralleiters N bzw. des kombinierten Schutz- und Neutralleiters PEN wird eine Überlastung des N-bzw. PEN-Pols mittels des thermischen Auslösers 3 für überlast und/oder mittels des elektromagnetischen Auslösers 2 für Kurzschluss erfasst, und das in diesem Pol P4 mit den Auslösern 2,3 gekoppelte Schaltschloss 5 wird ausgelöst. Die Auslösung des Schaltschlosses 5 des N- bzw. PEN-Pols P4 bewirkt infolge der Kopplung dessen Auslöseeinrichtung 2,3 mit den Abschalteinrichtungen 4,5 der Phasenpole eine Auslösung der übrigen Phasenpole P1 bis P4, so dass deren Schaltkontakte 4 geöffnet werden und eine Abschaltung vom Netz Ln erfolgt.In case of overload of the neutral conductor N or the combined protective and neutral conductor PEN is an overload of the N or. PEN pole detected by means of the thermal release 3 for overload and / or by means of the electromagnetic release 2 for short circuit, and coupled in this pole P4 with the triggers 2.3 switching mechanism 5 is triggered. The triggering of the switching mechanism 5 of the N- or PEN pole P4 causes due to the coupling of the triggering device 2,3 with the turn-off 4.5 of the phase poles a release of the remaining phase poles P1 to P4, so that their switching contacts 4 are opened and a shutdown from the network L n .

Dabei erfolgt eine Abschaltung des N- bzw. PEN-Pols lediglich indirekt, indem die übrigen Phasenpole P1 bis P3 infolge der Kopplung deren Abschalteinrichtungen 4,5 mit der Auslöseeinrichtung 2,3 des Pols P4 ausgeschaltet werden, während der N-bzw. PEN-Pol P4 aufgrund der Überbrückung des Schaltkontaktes 4 dieses Pols P4 auch im Auslösefall unterbrechungsfrei ist. Somit bleibt die Schutzwirkung des N- bzw. PEN-Pols erhalten.In this case, a shutdown of the N- or PEN pole takes place only indirectly by the remaining phase poles P1 to P3 are switched off as a result of the coupling of their defoggans 4.5 with the triggering device 2.3 of the pole P4, while the N or. PEN pole P4 due to the bridging of the switching contact 4 of this pole P4 is uninterruptible in the event of tripping. Thus, the protective effect of the N- or PEN-pole is maintained.

Im Gegensatz dazu ist der PEN- bzw. N-Pol P4 des Schutzschalters 1 gemäß FIG 2 lediglich Schutz- oder Auslöseorgan, während dieser Pol P4 selbst nicht geschaltet wird. Wesentliche Komponente des nicht oder unterbrechungsfrei geschalteten N- bzw. PEN-Pols P4 ist daher die Auslöseeinrichtung 2,3 zur Stromerfassung und Weiterleitung des Auslösesignals an die mit diesem Pol P4 gekoppelten Phasenpole P1 bis P3.In contrast, the PEN or N pole P4 of the circuit breaker 1 according to FIG 2 only protective or trip device, while this pole P4 itself is not switched. The essential component of the non-switched or uninterrupted N- or PEN-pole P4 is therefore the tripping device 2,3 for current detection and forwarding of the trigger signal to the coupled with this pole P4 phase poles P1 to P3.

Gegenüber dem Schalter gemäß FIG 2 bietet die Erfindung gemäß FIG 1 den Vorteil, dass bei dem dortigen mehrpoligen Schutzschalter 1 praktisch identische Schaltgeräte oder Pole P1 bis P4 eingesetzt werden können. Dabei ist lediglich der an den Neutralleiter N oder an den kombinierten Schutz- und Neutralleiter PEN anzuschließende Pol P4 mit dem Element 6 zur Überbrückung dessen Schaltkontaktes 4 zu versehen. Eine derartige Nachrüstung des für den N- bzw. PEN-Pols P4 vorgesehenen Schaltgerätes ist fertigungstechnisch in besonders einfacher Art und Weise durchführbar.Compared with the switch according to FIG 2, the invention according to FIG 1 offers the advantage that in the local multi-pole circuit breaker 1 virtually identical switching devices or poles P1 to P4 can be used. In this case, only the pole P4 to be connected to the neutral conductor N or to the combined protective and neutral conductor PEN is to be provided with the element 6 for bridging its switching contact 4. Such a retrofit provided for the N- or PEN pole P4 switching device manufacturing technology in a particularly simple manner feasible.

Claims (3)

  1. Multipole circuit breaker (1) for a multiphase electrical supply system (Ln) with neutral conductor (N) or with combined neutral and protective conductor (PEN), comprising
    - phase pole (Pn) with cut-off devices (4,5) and
    - an N pole (P4) assigned to the neutral conductor (N) or, as the case may be, a PEN pole (P4) assigned to the neutral and protective conductor (PEN) which has a triggering device (2,3) and a cut-off device (4,5) with bridged switching contact,
    - with the triggering device (2,3) of the N or, as the case may be, PEN pole (P4) being coupled to the cut-off device (4,5) of the or of each phase pole (Pn), which device does not switch the N or, as the case may be, PEN pole (P4) or does so in a no-break manner.
  2. Multipole circuit breaker according to claim 1, characterised in that the triggering device of the N or, as the case may be, PEN pole (P4) has a thermal tripping device (3) or a thermal tripping device (3) and an electromagnetic tripping device (2).
  3. Multipole circuit breaker according to one of claims 1 and 2, characterised in that each pole (Pn, P4) includes a switching latch (5) coupled to the further poles (Pn,P4).
EP00112615A 2000-06-14 2000-06-14 Multipole circuit breaker Expired - Lifetime EP1164615B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP00112615A EP1164615B1 (en) 2000-06-14 2000-06-14 Multipole circuit breaker
DE50014137T DE50014137D1 (en) 2000-06-14 2000-06-14 Multipole circuit breaker
PT00112615T PT1164615E (en) 2000-06-14 2000-06-14 Multipole circuit breaker
AT00112615T ATE356421T1 (en) 2000-06-14 2000-06-14 MULTIPOLE CIRCUIT SWITCH
ES00112615T ES2280161T3 (en) 2000-06-14 2000-06-14 MULTIPOLAR PROTECTION SWITCH.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00112615A EP1164615B1 (en) 2000-06-14 2000-06-14 Multipole circuit breaker

Publications (2)

Publication Number Publication Date
EP1164615A1 EP1164615A1 (en) 2001-12-19
EP1164615B1 true EP1164615B1 (en) 2007-03-07

Family

ID=8168974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00112615A Expired - Lifetime EP1164615B1 (en) 2000-06-14 2000-06-14 Multipole circuit breaker

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EP (1) EP1164615B1 (en)
AT (1) ATE356421T1 (en)
DE (1) DE50014137D1 (en)
ES (1) ES2280161T3 (en)
PT (1) PT1164615E (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005049181B4 (en) * 2005-10-14 2009-08-27 Moeller Gmbh Three-pole circuit breaker and method for its manufacture
DE102007025673A1 (en) * 2007-06-01 2008-12-04 Abb Ag Power protection unit for use with electronic circuit of phase failure guard for distribution network, has phasing line and neutral line, where phasing line has circuit breakers assigned for disconnection of phasing line
DE102014010034B4 (en) * 2013-07-18 2020-11-05 Abb Ag Arrangement with phase switching devices and a neutral conductor switching device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1152120A (en) * 1956-02-17 1958-02-12 Thomson Houston Comp Francaise Improvement in multipolar circuit breakers for first category electrical installations
US3464045A (en) * 1967-05-11 1969-08-26 Gen Electric Circuit breaker selective trip mechanism
DE3374487D1 (en) * 1982-08-19 1987-12-17 Bbc Brown Boveri & Cie Circuit breaker with leakage current release
US5383084A (en) * 1993-01-08 1995-01-17 Leviton Manufacturing Co., Inc. Circuit analyzing system

Also Published As

Publication number Publication date
PT1164615E (en) 2007-04-30
EP1164615A1 (en) 2001-12-19
ES2280161T3 (en) 2007-09-16
DE50014137D1 (en) 2007-04-19
ATE356421T1 (en) 2007-03-15

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