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EP1126488B1 - Selective switch especially electrical main line protection switch - Google Patents

Selective switch especially electrical main line protection switch Download PDF

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Publication number
EP1126488B1
EP1126488B1 EP01102622A EP01102622A EP1126488B1 EP 1126488 B1 EP1126488 B1 EP 1126488B1 EP 01102622 A EP01102622 A EP 01102622A EP 01102622 A EP01102622 A EP 01102622A EP 1126488 B1 EP1126488 B1 EP 1126488B1
Authority
EP
European Patent Office
Prior art keywords
selective
bimetallic strip
bimetallic
switching device
bimetal
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
EP01102622A
Other languages
German (de)
French (fr)
Other versions
EP1126488A3 (en
EP1126488A2 (en
Inventor
Erwin Muders
Joachim Majewski
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.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
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 ABB Patent GmbH filed Critical ABB Patent GmbH
Publication of EP1126488A2 publication Critical patent/EP1126488A2/en
Publication of EP1126488A3 publication Critical patent/EP1126488A3/en
Application granted granted Critical
Publication of EP1126488B1 publication Critical patent/EP1126488B1/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
    • 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
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H01H71/162—Electrothermal mechanisms with bimetal element with compensation for ambient temperature
    • 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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker

Definitions

  • the invention relates to a selective switching device according to the preamble of claim 1.
  • Such a switching device has become known from DE 195 26 592 C2.
  • This switching device has a main current path with a main bimetallic and a Maustrompfad, in which a so-called selective bimetal is located.
  • the Hauptbimetall a Kompensationsbimetall is assigned.
  • the three bimetals are approximately parallel to each other and their free ends lie in a line which is approximately perpendicular to the mounting plane of the switching device.
  • a coupling slide Transversely to the end of the bimetallic a coupling slide runs, which is designed as a flat slide and at one end has a pocket into which the Kompensationsbimetall engages, whereas at the other end a transverse wall is provided, against which strikes the Hauptbimetall when deflecting and entrains the slide ,
  • the Kompensationsbimetall is firmly connected to a release lever, so that when the Kompensationsbimetall is pivoted from Hauptbimetall, the release lever unlatches a Verklinkungsstelle in the switching mechanism of the switching device.
  • the selective bimetal located between the two also acts on a transverse wall of the slider so that the selectivity bimetal pivots the trigger lever.
  • the object of the invention is to further improve a switching device of the type mentioned.
  • the selective bimetal acts directly on the Verklinkungsstelle, without being coupled with the compensation bimetal.
  • the coupling slide is designed as an elongate flat slide, which extends transversely to the bimetals and is provided with perpendicular to the plane of the flat rail extending walls, with which the main and the compensation bimetal cooperate.
  • the selective switching device in which the invention is implemented, is a switching device with the designation S 700 of ABB Stotz-contact GmbH, Heidelberg; this switching device S 700 is described in DE 195 26 592 C2.
  • the switching device contains a main bimetal 10 which is located in a main current path (not shown) of the circuit breaker. This main bimetal is firmly clamped at one end at 11; the other end 12 may deflect due to thermal exposure.
  • the Hauptbimetall 10 is associated with a Kompensationsbimetall 13, which is parallel to the Hauptbimetall 10 and which is secured to a holding device 14 which is pivotable about an axis 15 pivotally and to which a trigger lever 16 is attached, in addition to the Kompensationsbimetall 13 parallel thereto and protrudes in the same direction and at its free end contains a bend 17 which acts on a Verklinkungshebel 18 of a switching mechanism 19 shown only schematically.
  • the axis of rotation 15 is located approximately on a line which is approximately perpendicular to the mounting plane B-B and through the attachment point 11 of the main bimetal.
  • the free ends 12, 20 of the Hauptbimetalls 10 and the Kompensationsbimetalls 13 are also approximately on a line that is perpendicular or approximately perpendicular to the mounting plane B-B.
  • Transverse to the bimetals 10, 13 extends a slider 21, which has at its one end by walls 22 and 23 formed pocket 24 into which the compensating bimetal with its free end 20 engages.
  • the mounting plane BB facing the end of the slider 21 is a perpendicular transverse wall 25 against which the free end 12 of the main bimetal comes to rest when heated and shifts the slider in the direction of arrow P.
  • the Kompensationsbimetall 13 pivoted about the axis 15, so that the release lever 16 pivots clockwise and the cranked end 17 abuts against the Verklinkungshebel 18 and this also shifts in the direction of arrow P, so that the latching point located in the interior of the switching mechanism 19 and open contact points in the switching device be opened.
  • selective bimetal 26 is inserted in a secondary current path of the switching device; This selective bimetal 26 is intended to permanently open the switch when an overcurrent is present for a certain time.
  • the representation of the mode of operation of the selective bimetal 26 can be found in the abovementioned DE 195 26 592 C2.
  • a Doppelarmhebel 31 is rotatably mounted, which has a first arm 32 which cooperates with the Selektivbimetall 26; the double-arm lever 31 further has a second arm 33 which cooperates with the latching lever 18.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Keying Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Gas-Insulated Switchgears (AREA)

Abstract

The device has a first current path containing a main bimetallic element (10) and a connected compensation bimetallic element (13) coupled together with a coupling sliding element (21) and a secondary current path containing a selective bimetallic element (26), whereby the bimetallic elements are arranged in parallel. The selective bimetallic element acts on one interlocking point of a switch lock (19) with an associated transfer element (31).

Description

Die Erfindung betrifft ein selektives Schaltgerät gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a selective switching device according to the preamble of claim 1.

Ein derartiges Schaltgerät ist aus der DE 195 26 592 C2 bekannt geworden. Dieses Schaltgerät besitzt einen Hauptstrompfad mit einem Hauptthermobimetall und einen Nebenstrompfad, in dem sich ein sogenanntes Selektivbimetall befindet. Dem Hauptbimetall ist ein Kompensationsbimetall zugeordnet. Die drei Bimetalle verlaufen etwa parallel zueinander und ihre freien Enden liegen in einer Linie, die etwa senkrecht zur Befestigungsebene des Schaltgerätes verläuft. Quer zu dem Ende der Thermobimetalle verläuft ein Koppelungsschieber, der als Flachschieber ausgebildet ist und an seinem einen Ende eine Tasche aufweist, in die das Kompensationsbimetall eingreift, wogegen am anderen Ende eine Querwand vorgesehen ist, gegen die das Hauptbimetall beim Auslenken anschlägt und den Schieber mitnimmt. Das Kompensationsbimetall ist mit einem Auslösehebel fest verbunden, so daß dann, wenn das Kompensationsbimetall vom Hauptbimetall verschwenkt wird, der Auslösehebel eine Verklinkungsstelle im Schaltschloß des Schaltgerätes entklinkt.Such a switching device has become known from DE 195 26 592 C2. This switching device has a main current path with a main bimetallic and a Nebenstrompfad, in which a so-called selective bimetal is located. The Hauptbimetall a Kompensationsbimetall is assigned. The three bimetals are approximately parallel to each other and their free ends lie in a line which is approximately perpendicular to the mounting plane of the switching device. Transversely to the end of the bimetallic a coupling slide runs, which is designed as a flat slide and at one end has a pocket into which the Kompensationsbimetall engages, whereas at the other end a transverse wall is provided, against which strikes the Hauptbimetall when deflecting and entrains the slide , The Kompensationsbimetall is firmly connected to a release lever, so that when the Kompensationsbimetall is pivoted from Hauptbimetall, the release lever unlatches a Verklinkungsstelle in the switching mechanism of the switching device.

Das zwischen den beiden befindliche Selektivbimetall wirkt ebenfalls auf eine Querwand des Schiebers, so daß das Selektivitätsbimetall den Auslösehebel verschwenkt.The selective bimetal located between the two also acts on a transverse wall of the slider so that the selectivity bimetal pivots the trigger lever.

Damit sind das Hauptbimetall und das Selektivbimetall sowie das Kompensationsbimetall miteinander gekoppelt.Thus, the main bimetal and the selective bimetal and the compensation bimetal are coupled together.

Aufgabe der Erfindung ist es, ein Schaltgerät der eingangs genannten Art weiter zu verbessern.The object of the invention is to further improve a switching device of the type mentioned.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst.This object is achieved by the features of claim 1.

Danach wirkt das Selektivbimetall nicht mehr auf den Schieber ein, sondern auf einen Arm eines Übertragungsdoppelarmhebels; der an der Arm des Doppelarmhebels wirkt auf die Verklinkungsstelle und entklinkt das Schaltschloß.Thereafter, the selective bimetal no longer acts on the slider, but on an arm of a Übertragungsdoppelarmhebels; on the arm of the double-arm lever acts on the Verklinkungsstelle and unlatch the switch lock.

Dadurch ist eine Entkoppelung des Selektivbimetalls und des Kompensationsbimetalls erreicht. Wenn sich nämlich das Selektivbimetall bei der bekannten Anordnung verschoben hat, dann muß das Selektivbimetall gegen das Kompensationsbimetall arbeiten und dieses mit betätigen. Bei der erfindungsgemäßen Ausgestaltung wirkt das Selektivbimetall direkt auf die Verklinkungsstelle ein, ohne mit dem Kompensationsbimetall gekoppelt zu sein.As a result, a decoupling of the selective bimetal and the compensation bimetal is achieved. Namely, if the selective bimetal has shifted in the known arrangement, then the selective bimetal must work against the compensation bimetal and operate this with. In the embodiment according to the invention, the selective bimetal acts directly on the Verklinkungsstelle, without being coupled with the compensation bimetal.

Gemäß einer weiteren Ausgestaltung der Erfindung ist der Koppelschieber als langgestreckter Flachschieber ausgebildet, der quer zu den Bimetallen verläuft und mit senkrecht zur Ebene der Flachschiene verlaufenden Wandungen versehen ist, mit denen das Haupt- und das Kompensationsbimetall zusammenwirken.According to a further embodiment of the invention, the coupling slide is designed as an elongate flat slide, which extends transversely to the bimetals and is provided with perpendicular to the plane of the flat rail extending walls, with which the main and the compensation bimetal cooperate.

Weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung sind den weiteren Unteransprüchen zu entnehmen.Further advantageous embodiments and improvements of the invention can be found in the further subclaims.

Anhand der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung und weitere Vorteile näher erläutert und beschrieben werden.Reference to the drawing, in which an embodiment of the invention is shown, the invention and further advantageous refinements and improvements of the invention and other advantages will be explained and described in detail.

Es zeigt:

Die einzige Fig.
eine schematische Darstellung der Bimetalle eines selektiven Schaltgerätes.
It shows:
The only Fig.
a schematic representation of the bimetals of a selective switching device.

Das selektive Schaltgerät, in dem die Erfindung verwirklicht ist, ist ein Schaltgerät mit der Bezeichnung S 700 der Firma ABB Stotz-Kontakt GmbH, Heidelberg; dieses Schaltgerät S 700 ist in der DE 195 26 592 C2 beschrieben.The selective switching device, in which the invention is implemented, is a switching device with the designation S 700 of ABB Stotz-contact GmbH, Heidelberg; this switching device S 700 is described in DE 195 26 592 C2.

Das Schaltgerät enthält ein Hauptbimetall 10, das in einem Hauptstrompfad (nicht gezeigt) des Leitungsschutzschalters liegt. Dieses Hauptbimetall ist an einem Ende bei 11 fest eingespannt; das andere Ende 12 kann sich auf Grund einer thermischen Einwirkung ausbiegen.The switching device contains a main bimetal 10 which is located in a main current path (not shown) of the circuit breaker. This main bimetal is firmly clamped at one end at 11; the other end 12 may deflect due to thermal exposure.

Dem Hauptbimetall 10 ist ein Kompensationsbimetall 13 zugeordnet, welches parallel zu dem Hauptbimetall 10 verläuft und das an einer Halteeinrichtung 14 befestigt ist, die drehbar um eine Achse 15 schwenkbar ist und an der ein Auslösehebel 16 befestigt ist, der neben dem Kompensationsbimetall 13 parallel dazu und in gleiche Richtung vorspringt und an seinem freien Ende eine Abkröpfung 17 enthält, die auf einen Verklinkungshebel 18 eines nur schematisch dargestellten Schaltschlosses 19 einwirkt. Die Drehachse 15 befindet sich etwa auf einer Linie, die etwa senkrecht zur Befestigungsebene B-B und durch die Befestigungsstelle 11 des Hauptbimetalls verläuft. Die freien Enden 12, 20 des Hauptbimetalls 10 und des Kompensationsbimetalls 13 liegen ebenfalls etwa auf einer Linie, die senkrecht oder etwa senkrecht zur Befestigungsebene B-B verläuft.The Hauptbimetall 10 is associated with a Kompensationsbimetall 13, which is parallel to the Hauptbimetall 10 and which is secured to a holding device 14 which is pivotable about an axis 15 pivotally and to which a trigger lever 16 is attached, in addition to the Kompensationsbimetall 13 parallel thereto and protrudes in the same direction and at its free end contains a bend 17 which acts on a Verklinkungshebel 18 of a switching mechanism 19 shown only schematically. The axis of rotation 15 is located approximately on a line which is approximately perpendicular to the mounting plane B-B and through the attachment point 11 of the main bimetal. The free ends 12, 20 of the Hauptbimetalls 10 and the Kompensationsbimetalls 13 are also approximately on a line that is perpendicular or approximately perpendicular to the mounting plane B-B.

Quer zu den Bimetallen 10, 13 verläuft ein Schieber 21, der an seinem einen Ende eine durch Wandungen 22 und 23 gebildete Tasche 24 aufweist, in die das Kompensationsbimetall mit seinem freien Ende 20 eingreift. Am anderen, der Befestigungsebene B-B zugewandten Ende des Schiebers 21 befindet sich eine senkrecht verlaufende Querwand 25, gegen die das freie Ende 12 des Hauptbimetalls bei Erwärmung zum Anliegen kommt und den Schieber in Pfeilrichtung P verschiebt. Über die Tasche 24 und insbesondere über die Wandung 22, die der Wandung 25 parallel verläuft, wird das Kompensationsbimetall 13 um die Achse 15 verschwenkt, so daß sich der Auslösehebel 16 im Uhrzeigersinn verschwenkt und das abgekröpfte Ende 17 gegen den Verklinkungshebel 18 anschlägt und diesen ebenfalls in Pfeilrichtung P verschiebt, so daß die im inneren des Schaltschlosses 19 befindliche Verklinkungsstelle geöffnet und Kontaktstellen im Schaltgerät bleibend geöffnet werden.Transverse to the bimetals 10, 13 extends a slider 21, which has at its one end by walls 22 and 23 formed pocket 24 into which the compensating bimetal with its free end 20 engages. At the other, the mounting plane BB facing the end of the slider 21 is a perpendicular transverse wall 25 against which the free end 12 of the main bimetal comes to rest when heated and shifts the slider in the direction of arrow P. About the pocket 24 and in particular on the wall 22, which runs parallel to the wall 25, the Kompensationsbimetall 13 pivoted about the axis 15, so that the release lever 16 pivots clockwise and the cranked end 17 abuts against the Verklinkungshebel 18 and this also shifts in the direction of arrow P, so that the latching point located in the interior of the switching mechanism 19 and open contact points in the switching device be opened.

Zwischen den beiden Thermobimetallen 10 und 13 befindet sich ein sogenanntes Selektivbimetall 26, welches in einen Nebenstrompfad des Schaltgerätes eingesetzt ist; dieses Selektivbimetall 26 soll den Schalter bleibend öffnen, wenn ein Überstrom eine bestimmte Zeit ansteht. Die Darstellung der Funktionsweise des Selektivbimetalls 26 ist der oben genannten DE195 26 592 C2 zu entnehmen.Between the two thermal bimetals 10 and 13 is a so-called selective bimetal 26, which is inserted in a secondary current path of the switching device; This selective bimetal 26 is intended to permanently open the switch when an overcurrent is present for a certain time. The representation of the mode of operation of the selective bimetal 26 can be found in the abovementioned DE 195 26 592 C2.

Auf einer Achse 30, die - bezogen auf die Befestigungsebene B-B - etwa in der Höhe des Verklinkungshebels 18 liegt, ist ein Doppelarmhebel 31 drehbar gelagert, der einen ersten Arm 32 aufweist, der mit dem Selektivbimetall 26 zusammenwirkt; der Doppelarmhebel 31 besitzt weiterhin einen zweiten Arm 33, der mit dem Verklinkungshebel 18 zusammenwirkt. Wenn sich in bestimmten Fällen das Selektivbimetall, das zwischen den beiden Bimetallen 10 und 13 liegt und bei 34 eingespannt ist, wobei die Einspannstelle 34 etwa in der Verbindungslinie der Drehachse 15 und der Befestigungsstelle 11 liegt, wobei das freie Ende des Bimetalls 26 in der Linie liegt, in der auch die Enden der Thermobimetalle 10 und 13 liegen, verbiegt, dann bewegt sich das freie Ende des Selektivbimetalls 26 in Pfeilrichtung P; dadurch wird der Arm 32 und damit die Doppelarmhebelanordnung 30 in Drehung entgegen dem Uhrzeigersinn verschwenkt; der Arm 33 legt sich gegen den Verklinkungshebel 18 an und löst auf diese Weise die Verklinkungsstelle im Schaltschloß, so daß die Schaltkontakte bleibend geöffnet werden.On an axis 30, which - based on the mounting plane B-B - is approximately in the height of Verklinkungshebels 18, a Doppelarmhebel 31 is rotatably mounted, which has a first arm 32 which cooperates with the Selektivbimetall 26; the double-arm lever 31 further has a second arm 33 which cooperates with the latching lever 18. In certain cases, when the selective bimetal lying between the two bimetals 10 and 13 and clamped at 34, wherein the clamping point 34 is located approximately in the line connecting the rotation axis 15 and the attachment point 11, wherein the free end of the bimetal 26 in the line is, in which also the ends of the thermostatic bimetals 10 and 13 lie, bends, then moves the free end of the Selektivbimetalls 26 in the direction of arrow P; thereby the arm 32 and thus the Doppelarmhebelanordnung 30 is pivoted in a counterclockwise direction; the arm 33 bears against the Verklinkungshebel 18 and solves in this way the Verklinkungsstelle in the switching mechanism, so that the switching contacts are permanently opened.

Claims (3)

  1. Selective switching device, in particular mains circuit breaker, having a first current path, in which a main bimetallic strip (10) and, connected thereto, a compensation bimetallic strip (13) are located, which are mechanically coupled by means of a coupling slide (21), and having a secondary current path, in which a selective bimetallic strip (26) is located, the bimetallic strips running parallel to one another, characterized in that the selective bimetallic strip acts on a latching point of a switching mechanism (19) by means of a dedicated transmission element (31).
  2. Switching device according to Claim 1, characterized in that the transmission element (31) is a twin-armed lever, whose one arm (32) interacts with the selective bimetallic strip (26) and whose other arm (33) stops against a latching lever (18) when the bimetallic strip is bent out, with the result that the latching point is opened.
  3. Switching device according to one of the preceding claims, characterized in that the coupling element is in the form of an elongate, flat slide, which runs transversely with respect to the bimetallic strips (10, 26, 13) and is provided with walls, which run at right angles to the plane of the flat slide and parallel to the fixing plane and with which the main bimetallic strip (10) and the compensation bimetallic strip (13) interact independently of the selective bimetallic strip (26).
EP01102622A 2000-02-16 2001-02-07 Selective switch especially electrical main line protection switch Expired - Lifetime EP1126488B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10006944 2000-02-16
DE10006944A DE10006944A1 (en) 2000-02-16 2000-02-16 Selective switching device, especially main circuit breaker

Publications (3)

Publication Number Publication Date
EP1126488A2 EP1126488A2 (en) 2001-08-22
EP1126488A3 EP1126488A3 (en) 2003-07-30
EP1126488B1 true EP1126488B1 (en) 2006-12-27

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP01102622A Expired - Lifetime EP1126488B1 (en) 2000-02-16 2001-02-07 Selective switch especially electrical main line protection switch

Country Status (3)

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EP (1) EP1126488B1 (en)
AT (1) ATE349768T1 (en)
DE (2) DE10006944A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004019178A1 (en) * 2004-04-16 2005-11-03 Abb Patent Gmbh Service switching device
DE102008020453A1 (en) 2007-04-28 2008-10-30 Abb Ag Installation switching device i.e. selective main line circuit breaker, has compensation bimetal and adjusting device, which are assigned to main thermo bimetal, where adjusting device holds coupling between compensation and thermo bimetals

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3823975A1 (en) * 1988-07-15 1990-01-18 Asea Brown Boveri SELECTIVE SHORT CIRCUIT PROTECTION DEVICE
DE4040263A1 (en) * 1990-12-17 1992-06-25 Abb Patent Gmbh INSTALLATION DEVICE
DE4118377C2 (en) * 1991-06-05 1999-03-04 Hager Electro Gmbh Line and / or device circuit breaker
DE19526592C2 (en) * 1995-07-21 1999-04-15 Abb Patent Gmbh Electrical switch, in particular circuit breaker

Also Published As

Publication number Publication date
DE10006944A1 (en) 2001-09-06
ATE349768T1 (en) 2007-01-15
EP1126488A3 (en) 2003-07-30
DE50111711D1 (en) 2007-02-08
EP1126488A2 (en) 2001-08-22

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