EP1628317B1 - Circuit breaker with short circuit and overload trip indicator and according method - Google Patents

Circuit breaker with short circuit and overload trip indicator and according method Download PDF

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Publication number
EP1628317B1
EP1628317B1 EP05107358A EP05107358A EP1628317B1 EP 1628317 B1 EP1628317 B1 EP 1628317B1 EP 05107358 A EP05107358 A EP 05107358A EP 05107358 A EP05107358 A EP 05107358A EP 1628317 B1 EP1628317 B1 EP 1628317B1
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EP
European Patent Office
Prior art keywords
circuit
circuit breaker
facility
overload
cut
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.)
Not-in-force
Application number
EP05107358A
Other languages
German (de)
French (fr)
Other versions
EP1628317A3 (en
EP1628317A2 (en
Inventor
Ludwig Birkl
Stefan Höhe
Gunther Eckert
Christoph Weber
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Siemens AG
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Siemens AG
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Filing date
Publication date
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Publication of EP1628317A2 publication Critical patent/EP1628317A2/en
Publication of EP1628317A3 publication Critical patent/EP1628317A3/en
Application granted granted Critical
Publication of EP1628317B1 publication Critical patent/EP1628317B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic 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
    • H01H71/04—Means for indicating condition of the switching device
    • 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
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/62—Manual reset mechanisms which may be also used for manual release with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
    • 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
    • H01H71/04—Means for indicating condition of the switching device
    • H01H2071/042—Means for indicating condition of the switching device with different indications for different conditions, e.g. contact position, overload, short circuit or earth leakage

Definitions

  • the present invention relates to a circuit breaker according to the preamble of claim 1.
  • a circuit breaker is known from DE 198 19 242 A1 known. It is understood by circuit breakers, for example, circuit breaker, circuit breaker, motor protection switch and the like.
  • the term "protective switching device” is understood to mean in particular protective switching devices or installation built-in devices.
  • Circuit breakers often have an overload release and a short-circuit release. These two overcurrent trip mechanisms operate independently of each other and trip the circuit breaker in the event of overload or short-circuit current, i. the contacts of the circuit breaker are opened. After tripping and a subsequent elimination of the cause, the circuit breaker can be switched on again. However, to remedy the cause, it is convenient to know whether the circuit breaker has been triggered by an overload current or a short-circuit current.
  • Kopp a circuit breaker is known by the company, in which a so-called reset position is provided on the handle.
  • the handle When the circuit breaker is switched off, the handle does not return to the basic position, but instead into this reset or middle position. From this position the device can not be switched on again.
  • the handle must first be brought by hand to the basic position to be able to switch on the device again. However, the user receives no information about what the actual reason for the shutdown was, ie, whether an overload or a short circuit exists.
  • thermomagnetic circuit breaker which has a display device for selectively displaying the cause of the trip. Independently actuable tripping waves exert both a tripping function and a display function. In an alternative, an indication is given by additional release lever.
  • the object of the present invention is therefore to give the user in the case of triggering a circuit breaker information about why the triggering has taken place, wherein a compact structure is to be used.
  • the user can thus visually recognize to which cause the intended triggering of the protective switching device is due. It receives clear information as to whether the circuit breaker has been shut down by an overload current or a short-circuit current.
  • a switching mechanism of the contact device can be held in a freewheeling position by the display device holding the movable triggering element or the switching mechanism directly in a triggering position when displaying the respective triggering event.
  • the circuit breaker In this freewheeling position, the circuit breaker can not be turned on again and closing the contacts is inhibited. Switching to the freewheeling position has the advantage that the circuit breaker can not be accidentally turned on again. Rather, it is conscious to make an additional release.
  • FIG. 1 is in a circuit breaker, the housing 1 is indicated in principle in the drawing and shown in an open state, a short-circuit release 2 is arranged.
  • the short-circuit release 2 has a coil 21 which is connected to a fixed contact 3 of the circuit breaker and detects a short-circuit current.
  • the short-circuit release 2 has an armature 22, which protrudes with its proximal end into the coil 21 and is pulled in the presence of a short circuit due to the magnetic field into the interior of the coil 21.
  • the armature 22 is connected to a plunger 23 which moves a release lever 4 of the switching mechanism of the circuit breaker in the event of a short circuit.
  • the cylindrical armature 22 At its distal end, i. at its the end face opposite the plunger 23, the cylindrical armature 22 has a concentric plate 24. Its diameter is slightly larger than that of the armature 22. Therefore, a shoulder forms, to which a leaf spring 5 engages. It serves to reset the armature 22 in a defined horizontal position before and after the short circuit event. Instead of the plate 24, the armature 22, any other any shoulder or a projection to be formed, to which the leaf spring 5 engages.
  • the anchor 22 here with its plate 24, abuts against a vertically arranged pin 6.
  • This pin 6 is displaceable in the vertical direction. For this purpose, it is guided through a recess 11 on the housing 1. In the case of a short-circuit release protrudes a display portion 61 of the pin 6 from the recess 11 (see. FIG. 2 ). In the in FIG. 1 shown state, the pin 6 is biased by a spring 62 which is supported on a housing portion 12, which also guides the pin 6.
  • the pin 6 also has at its lower, i. the display portion 61 opposite end, a shoulder 63 which is pressed by the spring 62 to the armature 22 and to its plate 24. Thus, the vertical movement of the pin 6 is inhibited upward.
  • the armature 22 is withdrawn from the pin 6 and unlatched with its plunger 23, the trigger lever 4 of the switching mechanism.
  • the pin 6 is no longer held by the shoulder 63 in its normal operating position, but jumps, driven by the spring 62, upwards, as in FIG. 2 is shown.
  • the display section 61 protrudes from the recess 11 of the housing 1. The display section 61 indicates that the circuit breaker was triggered by a short circuit.
  • the pin has a reinforced stop section 64 in a horizontal direction, ie perpendicular to its main extension direction.
  • the armature 22 of the short-circuit release 2 is pressed against this reinforced abutment portion 64 by the leaf spring 5.
  • the trigger lever 4 and thus the switching mechanism is held in a freewheeling position in which the circuit breaker can not be turned on again. Only by pressing the pin 6 vertically down to the normal operating position of the armature 22 jumps back through the leaf spring 5 in its initial position and the release lever 4 in the Verklinkungsposition. The circuit breaker can then be turned on again. This ensures that the pin 6 is again in its normal operating position when it is switched on again and consequently fulfills its function as intended in the event of a renewed short circuit.
  • the display of the short-circuit release by the display section 61 allows the user to immediately recognize which type of fault led to the shutdown and whether a safe restart is possible.
  • a circuit breaker in the OFF state (tripped state) and a display section protruding from the housing must be short-circuited in the circuit. The user is thus informed of a possible error in his system and can react accordingly, for example by consulting a specialist.
  • a separate display for the overload release is therefore not necessary, since the cause of the trip can be clearly removed from the display device for the short-circuit release.
  • the overload release could be provided with a display device, while the short-circuit release has none.
  • the presence of an overload current is displayed directly. Indirectly, this also indicates that a short-circuit must have been present or was switched off manually, if the circuit breaker has tripped and an overload event is not displayed.
  • FIGS Figures 3 and 4 Another embodiment of the present invention is shown in FIGS Figures 3 and 4 shown. It relates to an overload release of a circuit breaker with display device.
  • the overload release including the mechanical display device in a normal operating state, ie before an overload event.
  • the display device comprises a pin 106 which is guided through a recess 111 and a housing portion 112 in the housing 101 of the circuit breaker.
  • the pin 106 also has a display portion 161 and a spring 162 which biases the pin 106 in the non-release position.
  • the pin 106 has a projection 163 extending perpendicular to the longitudinal extent of the pin 106. This projection 163 moves the release lever 104 of the switching mechanism of the circuit breaker, not shown further.
  • a pawl 120 is rotatably mounted on the housing 101.
  • the pawl 120 has a nose 121, which engages in the non-triggering position of the trigger lever 104 and the pin 106 in a recess 164 of the pin 106. In this position, the pawl 120 is held by a sprue spring 122, which on the pawl 120 is molded and is supported on the release lever 104 or a housing portion.
  • the pawl 120 has a projection 123 on which in the in FIG. 3 shown non-trip position of the components a bimetallic strip 130 is applied.
  • the pin 106 is held by the pawl 120 and in particular its nose 121 in the depressed position (non-triggering position) in which the display portion 161 is not or hardly visible to the operator.
  • the bimetal strip 130 now bends according to the current intensity and its duration of action and thus disconnects the switching mechanism. This is done by cooperation of the bimetallic strip 130 and the release lever 104. After triggering, the bimetallic strip bends back into its normal position.
  • the pin 106 driven by the spring 162, springs upwards, so that the display section 161 becomes visible to the user.
  • This tripping or Entklinkungsposition of the components involved is in FIG. 4 played.
  • the projection 163 of the pin 106 holds the release lever 104 in a freewheeling position in which the circuit breaker can not be turned on again. Only when the pin 106 is pressed down on its display section 161, the release lever 104 can leave the freewheeling position, so that the circuit breaker can be turned on again. This means that only by a conscious action of the operator of the circuit breaker is ready to start again.
  • the user can immediately recognize which type of fault, in this case overload, led to shutdown and whether a safe switch-on is possible again.
  • a circuit breaker in the OFF position and an "extended" pin 106 the user can safely close the circuit again, because there is only a temporary overload of the circuit. After switching off the inadmissibly high power consumption, the circuit is in order again.
  • a further alternative of a protective switching device according to the invention is that a separate display device is provided both for the short-circuit release and for the overload release. This would have the advantage that also the manual triggering could be distinguished from a tripping by short circuit or overload.

Abstract

Circuit breaker contains interruptable contact mechanism (3) for current flow; and short circuit cut-out (2) for interrupting contact mechanism at short circuit and/or overload cut-out occurrence. To cut-outs is coupled display (6) for clear indication of cut-out reason.Preferably display is of mechanical type coupled to each cut-out, and typically contains sprung display element (61), held in first position by movable cut-out element (22) of respective cut-out. It is driven to move into second position by position change of cut-out element. Independent claims are included for indication of state of protective circuit breaker.

Description

Die vorliegende Erfindung betrifft eine Schutzschaltvorrichtung gemäß dem Oberbegriff des Patentanspruchs 1. Eine solche Schutzschaltvorrichtung ist aus der DE 198 19 242 A1 bekannt. Dabei versteht man unter Schutzschalter beispielsweise Leitungsschutzschalter, Leistungsschalter, Motorschutzschalter und dgl.
Im vorliegenden Dokument versteht man unter dem Begriff "Schutzschaltvorrichtung" insbesondere Schutzschaltgeräte bzw. Installationseinbaugeräte.The present invention relates to a circuit breaker according to the preamble of claim 1. Such a circuit breaker is known from DE 198 19 242 A1 known. It is understood by circuit breakers, for example, circuit breaker, circuit breaker, motor protection switch and the like.
In the present document, the term "protective switching device" is understood to mean in particular protective switching devices or installation built-in devices.

Schutzschalter weisen häufig einen Überlastauslöser und einen Kurzschlussauslöser auf. Diese beiden Überstromauslöse-Mechanismen arbeiten unabhängig voneinander und lösen den Schutzschalter bei Überlaststrom oder Kurzschlussstrom aus, d.h. die Kontakte des Schutzschalters werden geöffnet. Nach dem Auslösen und einer anschließenden Behebung der Ursache kann der Schutzschalter wieder angeschaltet werden. Zur Behebung der Ursache ist es jedoch günstig, zu wissen, ob der Schutzschalter durch einen Überlaststrom oder einen Kurzschlussstrom ausgelöst wurde.Circuit breakers often have an overload release and a short-circuit release. These two overcurrent trip mechanisms operate independently of each other and trip the circuit breaker in the event of overload or short-circuit current, i. the contacts of the circuit breaker are opened. After tripping and a subsequent elimination of the cause, the circuit breaker can be switched on again. However, to remedy the cause, it is convenient to know whether the circuit breaker has been triggered by an overload current or a short-circuit current.

In diesem Zusammenhang ist von der Firma Kopp ein Leitungsschutzschalter bekannt, bei der am Griff eine so genannte Resetstellung vorgesehen ist. Bei einer Abschaltung des Leitungsschutzschalters springt der Griff nicht in die Grundstellung zurück, sondern in diese Reset- bzw. Mittelstellung. Von dieser Stellung aus kann das Gerät nicht wieder eingeschaltet werden. Der Griff muss erst von Hand in die Grundstellung gebracht werden, um das Gerät wieder einschalten zu können. Dabei erhält der Benutzer aber keine Information darüber, was der tatsächliche Grund für die Abschaltung war, d.h., ob eine Überlast oder ein Kurzschluss vorliegt.In this context, Kopp a circuit breaker is known by the company, in which a so-called reset position is provided on the handle. When the circuit breaker is switched off, the handle does not return to the basic position, but instead into this reset or middle position. From this position the device can not be switched on again. The handle must first be brought by hand to the basic position to be able to switch on the device again. However, the user receives no information about what the actual reason for the shutdown was, ie, whether an overload or a short circuit exists.

Aus der DE 198 19 242 A1 ist ein thermomagnetischer Leistungsschalter bekannt, der eine Anzeigeeinrichtung zur selektiven Anzeige der Auslösegründe aufweist. Unabhängig voneinander betätigbare Auslösewellen üben sowohl eine Auslösefunktion als auch eine Anzeigefunktion aus. In einer Alternative erfolgt eine Anzeige durch zusätzliche Auslösehebel.From the DE 198 19 242 A1 a thermomagnetic circuit breaker is known which has a display device for selectively displaying the cause of the trip. Independently actuable tripping waves exert both a tripping function and a display function. In an alternative, an indication is given by additional release lever.

Die Aufgabe der vorliegenden Erfindung besteht somit darin, dem Benutzer im Falle des Auslösens eines Leitungsschutzschalters Informationen darüber zu geben, weshalb das Auslösen stattgefunden hat, wobei ein kompakter Aufbau verwendet werden soll.The object of the present invention is therefore to give the user in the case of triggering a circuit breaker information about why the triggering has taken place, wherein a compact structure is to be used.

Erfindungsgemäß wird diese Aufgabe durch eine Schutzschaltvorrichtung mit den Merkmalen gemäß Patentanspruch 1 gelöst.According to the invention, this object is achieved by a protective switching device with the features according to claim 1.

In vorteilhafter Weise kann der Benutzer damit optisch erkennen, auf welche Ursache das bestimmungsgemäße Auslösen des Schutzschaltgeräts zurückzuführen ist. Er erhält eine eindeutige Information darüber, ob der Schutzschalter durch einen Überlaststrom oder einen Kurzschlussstrom abgeschaltet wurde.In an advantageous manner, the user can thus visually recognize to which cause the intended triggering of the protective switching device is due. It receives clear information as to whether the circuit breaker has been shut down by an overload current or a short-circuit current.

Günstigerweise kann eine Schaltmechanik der Kontakteinrichtung in einer Freilaufposition gehalten werden, indem die Anzeigeeinrichtung beim Anzeigen des jeweiligen Auslöseereignisses das bewegliche Auslöseelement oder die Schaltmechanik direkt in einer Auslöseposition hält. In dieser Freilaufposition lässt sich der Schutzschalter nicht wieder einschalten und das Schließen der Kontakte ist gehemmt. Das Schalten in die Freilaufposition hat den Vorteil, dass der Schutzschalter nicht versehentlich wieder angeschaltet werden kann. Vielmehr ist bewusst eine zusätzliche Entriegelung vorzunehmen.Conveniently, a switching mechanism of the contact device can be held in a freewheeling position by the display device holding the movable triggering element or the switching mechanism directly in a triggering position when displaying the respective triggering event. In this freewheeling position, the circuit breaker can not be turned on again and closing the contacts is inhibited. Switching to the freewheeling position has the advantage that the circuit breaker can not be accidentally turned on again. Rather, it is conscious to make an additional release.

Die vorliegende Erfindung wird nun anhand der beigefügten Zeichnungen näher erläutert, in denen zeigen:

FIG 1
einen Kurzschlussauslöser eines Leitungsschutzschalters mit Anzeigeeinrichtung vor einem Kurzschlussereignis;
FIG 2
den Kurzschlussauslöser und die Anzeigeeinrichtung nach einem Kurzschlussereignis;
FIG 3
einen Überlastauslöser eines Leitungsschutzschalters mit Anzeigeeinrichtung vor einem Überlastereignis; und
FIG 4
den Überlastauslöser und die Anzeigeeinrichtung nach dem Überlastereignis.
The present invention will now be explained in more detail with reference to the accompanying drawings, in which:
FIG. 1
a short circuit release of a circuit breaker with indicator before a short circuit event;
FIG. 2
the short-circuit release and the display device after a short circuit event;
FIG. 3
an overload trip of a circuit breaker with indicator before an overload event; and
FIG. 4
the overload release and the display device after the overload event.

Die nachfolgend näher geschilderten Ausführungsbeispiele stellen bevorzugte Ausführungsformen der vorliegenden Erfindung dar.The embodiments described in more detail below represent preferred embodiments of the present invention.

Entsprechend FIG 1 ist in einem Leitungsschutzschalter, dessen Gehäuse 1 in der Zeichnung prinzipiell angedeutet und in einem offenen Zustand dargestellt ist, ein Kurzschlussauslöser 2 angeordnet. Der Kurzschlussauslöser 2 weist eine Spule 21 auf, die an einen Festkontakt 3 des Leitungsschutzschalters angeschlossen ist und einen Kurzschlussstrom detektiert. Ferner besitzt der Kurzschlussauslöser 2 einen Anker 22, der mit seinem proximalen Ende in die Spule 21 ragt und bei Vorliegen eines Kurzschlusses aufgrund des Magnetfelds ins Innere der Spule 21 gezogen wird. An seinem proximalen Ende ist der Anker 22 mit einem Stößel 23 verbunden, der einen Auslösehebel 4 der Schaltmechanik des Leitungsschutzschalters im Falle eines Kurzschlusses bewegt.Corresponding FIG. 1 is in a circuit breaker, the housing 1 is indicated in principle in the drawing and shown in an open state, a short-circuit release 2 is arranged. The short-circuit release 2 has a coil 21 which is connected to a fixed contact 3 of the circuit breaker and detects a short-circuit current. Furthermore, the short-circuit release 2 has an armature 22, which protrudes with its proximal end into the coil 21 and is pulled in the presence of a short circuit due to the magnetic field into the interior of the coil 21. At its proximal end, the armature 22 is connected to a plunger 23 which moves a release lever 4 of the switching mechanism of the circuit breaker in the event of a short circuit.

An seinem distalen Ende, d.h. an seiner dem Stößel 23 gegenüberliegenden Stirnseite besitzt der zylinderförmige Anker 22 eine konzentrische Platte 24. Ihr Durchmesser ist etwas größer als der des Ankers 22. Daher bildet sich eine Schulter aus, an die eine Blattfeder 5 angreift. Sie dient zum Rückstellen des Ankers 22 in eine definierte horizontale Position vor und nach dem Kurzschlussereignis. Anstelle der Platte 24 kann dem Anker 22 auch jede andere beliebige Schulter bzw. ein Vorsprung angeformt sein, an den die Blattfeder 5 angreift.At its distal end, i. at its the end face opposite the plunger 23, the cylindrical armature 22 has a concentric plate 24. Its diameter is slightly larger than that of the armature 22. Therefore, a shoulder forms, to which a leaf spring 5 engages. It serves to reset the armature 22 in a defined horizontal position before and after the short circuit event. Instead of the plate 24, the armature 22, any other any shoulder or a projection to be formed, to which the leaf spring 5 engages.

Durch die Blattfeder 5 getrieben, stößt der Anker 22, hier mit seiner Platte 24, an einem vertikal angeordneten Stift 6 an. Dieser Stift 6 ist in vertikaler Richtung verschiebbar. Hierzu ist er durch eine Aussparung 11 am Gehäuse 1 geführt. Im Falle einer Kurzschlussauslösung ragt ein Anzeigeabschnitt 61 des Stifts 6 aus der Aussparung 11 (vgl. FIG 2). In dem in FIG 1 dargestellten Zustand ist der Stift 6 durch eine Feder 62 vorgespannt, die sich an einem Gehäuseabschnitt 12 abstützt, welcher ebenfalls den Stift 6 führt.Driven by the leaf spring 5, the anchor 22, here with its plate 24, abuts against a vertically arranged pin 6. This pin 6 is displaceable in the vertical direction. For this purpose, it is guided through a recess 11 on the housing 1. In the case of a short-circuit release protrudes a display portion 61 of the pin 6 from the recess 11 (see. FIG. 2 ). In the in FIG. 1 shown state, the pin 6 is biased by a spring 62 which is supported on a housing portion 12, which also guides the pin 6.

Der Stift 6 besitzt ferner an seinem unteren, d.h. dem Anzeigeabschnitt 61 gegenüberliegenden Ende, eine Schulter 63, die durch die Feder 62 an den Anker 22 bzw. an dessen Platte 24 gedrückt wird. Somit ist die Vertikalbewegung des Stifts 6 nach oben gehemmt.The pin 6 also has at its lower, i. the display portion 61 opposite end, a shoulder 63 which is pressed by the spring 62 to the armature 22 and to its plate 24. Thus, the vertical movement of the pin 6 is inhibited upward.

Im Falle eines Kurzschlussereignisses wird der Anker 22 von dem Stift 6 abgezogen und entklinkt mit seinem Stößel 23 den Auslösehebel 4 der Schaltmechanik. Damit wird der Stift 6 nicht mehr durch die Schulter 63 in seiner Normal-Betriebsposition gehalten, sondern springt, getrieben durch die Feder 62, nach oben, wie dies in FIG 2 dargestellt ist. Dabei ragt der Anzeigeabschnitt 61 aus der Aussparung 11 des Gehäuses 1. Der Anzeigeabschnitt 61 zeigt damit an, dass der Leitungsschutzschalter durch einen Kurzschluss ausgelöst wurde.In the case of a short circuit event, the armature 22 is withdrawn from the pin 6 and unlatched with its plunger 23, the trigger lever 4 of the switching mechanism. Thus, the pin 6 is no longer held by the shoulder 63 in its normal operating position, but jumps, driven by the spring 62, upwards, as in FIG. 2 is shown. In this case, the display section 61 protrudes from the recess 11 of the housing 1. The display section 61 indicates that the circuit breaker was triggered by a short circuit.

Unterhalb der Schulter 63 weist der Stift einen in horizontaler Richtung, d.h. senkrecht zu seiner Hauptausdehnungsrichtung, einen verstärkten Anschlagabschnitt 64 auf. In der Kurzschlussanzeigeposition gemäß FIG 2 wird der Anker 22 des Kurzschlussauslösers 2 an diesen verstärkten Anschlagabschnitt 64 durch die Blattfeder 5 gedrückt. Dadurch wird der Auslösehebel 4 und somit die Schaltmechanik in einer Freilaufposition gehalten, in der der Leitungsschutzschalter nicht wieder eingeschaltet werden kann. Erst durch Drücken des Stifts 6 vertikal nach unten in die normale Betriebsposition springt der Anker 22 durch die Blattfeder 5 in seine Ausgangsposition und der Auslösehebel 4 in die Verklinkungsposition zurück. Der Leitungsschutzschalter kann dann wieder eingeschaltet werden. Dadurch wird gewährleistet, dass der Stift 6 beim Wiedereinschalten wieder in seiner normalen Betriebsposition steht und folglich bei einem erneuten Kurzschlussfall seine Funktion wieder bestimmungsgemäß erfüllt.Below the shoulder 63, the pin has a reinforced stop section 64 in a horizontal direction, ie perpendicular to its main extension direction. In the short circuit indication position according to FIG. 2 the armature 22 of the short-circuit release 2 is pressed against this reinforced abutment portion 64 by the leaf spring 5. As a result, the trigger lever 4 and thus the switching mechanism is held in a freewheeling position in which the circuit breaker can not be turned on again. Only by pressing the pin 6 vertically down to the normal operating position of the armature 22 jumps back through the leaf spring 5 in its initial position and the release lever 4 in the Verklinkungsposition. The circuit breaker can then be turned on again. This ensures that the pin 6 is again in its normal operating position when it is switched on again and consequently fulfills its function as intended in the event of a renewed short circuit.

Die Anzeige der Kurzschlussauslösung durch den Anzeigeabschnitt 61 lässt den Anwender sofort erkennen, welche Fehlerart zur Abschaltung führte und ob ein gefahrloses Wiedereinschalten möglich ist. Bei einem Leitungsschutzschalter im AUS-Zustand (ausgelöster Zustand) und einem aus dem Gehäuse herausstehenden Anzeigeabschnitt muss ein Kurzschluss im Stromkreis aufgetreten sein. Der Anwender wird damit auf einen möglichen Fehler in seiner Anlage hingewiesen und kann entsprechend reagieren, indem er beispielsweise einen Fachmann zu Rate zieht.The display of the short-circuit release by the display section 61 allows the user to immediately recognize which type of fault led to the shutdown and whether a safe restart is possible. A circuit breaker in the OFF state (tripped state) and a display section protruding from the housing must be short-circuited in the circuit. The user is thus informed of a possible error in his system and can react accordingly, for example by consulting a specialist.

Bei einem Leitungsschutzschalter im AUS-Zustand und einem nicht herausstehenden Anzeigeabschnitt wurde der Leitungsschutzschalter durch den Überlastauslöser wegen temporärer Überlastung des Stromkreises ausgelöst oder bewusst bzw. unbewusst von Hand ausgeschaltet. Der Stromkreis kann gefahrlos wieder eingeschaltet werden, wenn der Verbraucher mit dem unzulässig hohen Stromverbrauch weggeschaltet oder der sonstige Fehler in der Anlage behoben wurde.In a circuit breaker in the OFF state and a non-protruding display section of the circuit breaker was triggered by the overload release due to temporary overload of the circuit or deliberately or unconsciously turned off manually. The circuit can be switched on again without danger if the consumer has been switched off with the excessively high power consumption or the other fault in the system has been rectified.

Eine separate Anzeige für den Überlastauslöser ist somit nicht notwendig, da die Auslöseursache aus der Anzeigeeinrichtung für den Kurzschlussauslöser eindeutig entnommen werden kann. Alternativ könnte natürlich auch der Überlastauslöser mit einer Anzeigeeinrichtung versehen sein, während der Kurzschlussauslöser keine besitzt. Bei dieser Variante wird direkt das Vorliegen eines Überlaststroms angezeigt. Indirekt ist dadurch auch zu erkennen, dass ein Kurzschluss vorgelegen haben muss oder von Hand ausgeschaltet wurde, wenn der Leitungsschutzschalter ausgelöst hat und ein Überlastereignis nicht angezeigt ist.A separate display for the overload release is therefore not necessary, since the cause of the trip can be clearly removed from the display device for the short-circuit release. Alternatively, of course, the overload release could be provided with a display device, while the short-circuit release has none. In this variant, the presence of an overload current is displayed directly. Indirectly, this also indicates that a short-circuit must have been present or was switched off manually, if the circuit breaker has tripped and an overload event is not displayed.

Eine weitere Ausführungsform der vorliegenden Erfindung ist in den Figuren 3 und 4 dargestellt. Sie betrifft einen Überlastauslöser eines Leitungsschutzschalters mit Anzeigeeinrichtung. In FIG 3 befindet sich der Überlastauslöser einschließlich der mechanischen Anzeigeeinrichtung in einem normalen Betriebszustand, d. h. vor einem Überlastereignis. Auch hier umfasst die Anzeigeeinrichtung einen Stift 106, der durch eine Aussparung 111 und einen Gehäuseabschnitt 112 in dem Gehäuse 101 des Leitungsschutzschalters geführt wird. Der Stift 106 besitzt ebenfalls einen Anzeigeabschnitt 161 und eine Feder 162, die den Stift 106 in der Nicht-Auslöseposition vorspannt. An dem dem Anzeigeabschnitt 161 gegenüberliegenden Ende besitzt der Stift 106 einen Vorsprung 163, der sich senkrecht zur Längsausdehnung des Stifts 106 erstreckt. Dieser Vorsprung 163 bewegt den Auslösehebel 104 der weiter nicht dargestellten Schaltmechanik des Leitungsschutzschalters.Another embodiment of the present invention is shown in FIGS Figures 3 and 4 shown. It relates to an overload release of a circuit breaker with display device. In FIG. 3 is the overload release including the mechanical display device in a normal operating state, ie before an overload event. Again, the display device comprises a pin 106 which is guided through a recess 111 and a housing portion 112 in the housing 101 of the circuit breaker. The pin 106 also has a display portion 161 and a spring 162 which biases the pin 106 in the non-release position. At the opposite end of the display portion 161, the pin 106 has a projection 163 extending perpendicular to the longitudinal extent of the pin 106. This projection 163 moves the release lever 104 of the switching mechanism of the circuit breaker, not shown further.

Ebenfalls im Bereich des unteren Endes des Stifts 106 ist eine Klinke 120 drehbar am Gehäuse 101 gelagert. Die Klinke 120 besitzt eine Nase 121, die in der Nicht-Auslöseposition des Auslösehebels 104 bzw. des Stifts 106 in eine Aussparung 164 des Stifts 106 eingreift. In dieser Position wird die Klinke 120 durch eine Anspritzfeder 122 gehalten, die an der Klinke 120 angespritzt ist und sich an dem Auslösehebel 104 oder einem Gehäuseabschnitt abstützt.Also in the region of the lower end of the pin 106, a pawl 120 is rotatably mounted on the housing 101. The pawl 120 has a nose 121, which engages in the non-triggering position of the trigger lever 104 and the pin 106 in a recess 164 of the pin 106. In this position, the pawl 120 is held by a sprue spring 122, which on the pawl 120 is molded and is supported on the release lever 104 or a housing portion.

An dem der Nase 121 gegenüberliegenden Ende besitzt die Klinke 120 einen Vorsprung 123, an dem in der in FIG 3 dargestellten Nicht-Auslöseposition der Komponenten ein Bimetallstreifen 130 anliegt.At the opposite end of the nose 121, the pawl 120 has a projection 123 on which in the in FIG. 3 shown non-trip position of the components a bimetallic strip 130 is applied.

Im Folgenden wird nun die Funktion der Überlastauslösung mit entsprechender Anzeige näher dargestellt. Vor dem Überlastereignis wird der Stift 106 durch die Klinke 120 und insbesondere deren Nase 121 in der niedergedrückten Position (Nicht-Auslöseposition) gehalten, in der der Anzeigeabschnitt 161 für den Bediener nicht oder kaum sichtbar ist. Bei einem Überlaststrom biegt sich nun der Bimetallstreifen 130 entsprechend der Stromstärke und ihrer Einwirkdauer durch und entklinkt somit die Schaltmechanik. Dies geschieht durch Zusammenwirken des Bimetallstreifens 130 und des Auslösehebels 104. Nach der Auslösung biegt sich der Bimetallstreifen wieder in seine Grundstellung zurück.In the following, the function of the overload release with corresponding display will now be described in more detail. Before the overload event, the pin 106 is held by the pawl 120 and in particular its nose 121 in the depressed position (non-triggering position) in which the display portion 161 is not or hardly visible to the operator. In the event of an overload current, the bimetal strip 130 now bends according to the current intensity and its duration of action and thus disconnects the switching mechanism. This is done by cooperation of the bimetallic strip 130 and the release lever 104. After triggering, the bimetallic strip bends back into its normal position.

Löst nun der Bimetallstreifen 130 die Klinke 120 aus, so springt der Stift 106 durch die Feder 162 getrieben nach oben, so dass der Anzeigeabschnitt 161 für den Benutzer sichtbar wird. Diese Auslöse- bzw. Entklinkungsposition der beteiligten Komponenten ist in FIG 4 wiedergegeben. Der Vorsprung 163 des Stifts 106 hält dabei den Auslösehebel 104 in einer Freilaufposition, in der der Leitungsschutzschalter nicht wieder eingeschaltet werden kann. Erst wenn der Stift 106 an seinem Anzeigeabschnitt 161 nach unten gedrückt wird, kann der Auslösehebel 104 die Freilaufposition verlassen, so dass der Leitungsschutzschalter wieder eingeschaltet werden kann. Dies bedeutet, dass erst durch ein bewusstes Handeln des Bedieners der Leitungsschutzschalter wieder einschaltbereit ist.If the bimetallic strip 130 then releases the pawl 120, the pin 106, driven by the spring 162, springs upwards, so that the display section 161 becomes visible to the user. This tripping or Entklinkungsposition of the components involved is in FIG. 4 played. The projection 163 of the pin 106 holds the release lever 104 in a freewheeling position in which the circuit breaker can not be turned on again. Only when the pin 106 is pressed down on its display section 161, the release lever 104 can leave the freewheeling position, so that the circuit breaker can be turned on again. This means that only by a conscious action of the operator of the circuit breaker is ready to start again.

Der Anwender kann auch in diesem Anwendungsbeispiel sofort erkennen, welche Fehlerart, hier Überlast, zur Abschaltung führte und ob ein gefahrloses Einschalten wieder möglich ist. Bei einem Leitungsschutzschalter in AUS-Position und einem "ausgefahrenen" Stift 106 kann der Anwender den Stromkreis gefahrlos wieder schließen, weil nur eine temporäre Überlastung des Stromkreises vorliegt. Nach Wegschalten des unzulässig hohen Stromverbrauchs ist der Stromkreis wieder in Ordnung.In this application example, the user can immediately recognize which type of fault, in this case overload, led to shutdown and whether a safe switch-on is possible again. In a circuit breaker in the OFF position and an "extended" pin 106, the user can safely close the circuit again, because there is only a temporary overload of the circuit. After switching off the inadmissibly high power consumption, the circuit is in order again.

Bei einem Leitungsschutzschalter in AUS-Position und einem nicht sichtbaren Anzeigeabschnitt 161 der Anzeigeeinrichtung kann ein Kurzschluss im Stromkreis aufgetreten sein. In diesem Fall ist erhöhte Vorsicht angebracht. Der Anwender wird in dieser Konstellation auf einen möglichen Fehler in seiner Anlage hingewiesen und kann entsprechend reagieren, indem er beispielsweise einen Fachmann zu Rate zieht.In a circuit breaker in the OFF position and a non-visible display portion 161 of the display device, a short circuit in the circuit may have occurred. In this case, increased caution is appropriate. The user is pointed in this constellation on a possible error in his system and can respond accordingly, for example, by consulting a specialist.

Eine weitere Alternative einer erfindungsgemäßen Schutzschaltvorrichtung besteht darin, dass sowohl für den Kurzschlussauslöser als auch für den Überlastauslöser eine separate Anzeigeeinrichtung vorgesehen ist. Dies hätte den Vorteil, dass auch das manuelle Auslösen von einem Auslösen durch Kurzschluss oder Überlast unterschieden werden könnte.A further alternative of a protective switching device according to the invention is that a separate display device is provided both for the short-circuit release and for the overload release. This would have the advantage that also the manual triggering could be distinguished from a tripping by short circuit or overload.

Claims (2)

  1. Circuit breaker apparatus comprising
    - an interruptable contact facility (3) for carrying a current,
    - a short circuit trip facility (2) for interrupting the contact facility (3) in a short circuit event, said contact trip facility comprising a movable armature (22),
    - an overload trip facility for interrupting the contact facility in an overload event and
    - an indicator facility (6) which is connected to the short circuit trip facility (2) and can also be connected to the overload trip facility, and with which the short circuit event or the overload event or both can be represented as clearly isolated from one another, wherein the indicator facility (6) is a spring-supported movable indicator element (61),
    characterized in that
    the indicator facility is embodied as a pin (6) in which the armature (22) engages in order to secure said armature in a first pretensioned position, wherein by means of a position change of the armature (22) the pin (6) is unlocked to move into a second position.
  2. Circuit breaker apparatus according to claim 1, wherein a switching mechanism (4) of the contact device (3) can be held in a trip-free position by the armature (22) in that the indicator facility (6) upon indicating the respective trip event (6) holds the armature (22) in a trip position.
EP05107358A 2004-08-19 2005-08-10 Circuit breaker with short circuit and overload trip indicator and according method Not-in-force EP1628317B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004040288A DE102004040288B4 (en) 2004-08-19 2004-08-19 Circuit breaker with short-circuit and overload trip indication and corresponding procedure

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EP1628317A2 EP1628317A2 (en) 2006-02-22
EP1628317A3 EP1628317A3 (en) 2007-05-02
EP1628317B1 true EP1628317B1 (en) 2009-12-30

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AT (1) ATE453922T1 (en)
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DE102011079593B4 (en) 2011-07-21 2021-09-02 Siemens Aktiengesellschaft Electromechanical circuit breaker
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DE102016203506B4 (en) 2016-03-03 2021-10-07 Siemens Aktiengesellschaft Tripping device and electromechanical circuit breaker
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Also Published As

Publication number Publication date
ATE453922T1 (en) 2010-01-15
DE102004040288A1 (en) 2006-02-23
EP1628317A3 (en) 2007-05-02
EP1628317A2 (en) 2006-02-22
DE102004040288B4 (en) 2007-09-20
DE502005008768D1 (en) 2010-02-11

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