EP0159598A2 - Excess current thermal relay with adjusting bracket - Google Patents

Excess current thermal relay with adjusting bracket Download PDF

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Publication number
EP0159598A2
EP0159598A2 EP85104125A EP85104125A EP0159598A2 EP 0159598 A2 EP0159598 A2 EP 0159598A2 EP 85104125 A EP85104125 A EP 85104125A EP 85104125 A EP85104125 A EP 85104125A EP 0159598 A2 EP0159598 A2 EP 0159598A2
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EP
European Patent Office
Prior art keywords
adjusting
overcurrent relay
housing
slide
thermal overcurrent
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.)
Granted
Application number
EP85104125A
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German (de)
French (fr)
Other versions
EP0159598B1 (en
EP0159598A3 (en
Inventor
Karl-Heinz Lehmann
Friedrich Wink
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ASEA BROWN BOVERI AKTIENGESELLSCHAFT
Original Assignee
Brown Boveri und Cie AG Germany
Asea Brown Boveri AG Germany
BBC Brown Boveri AG Germany
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Application filed by Brown Boveri und Cie AG Germany, Asea Brown Boveri AG Germany, BBC Brown Boveri AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT85104125T priority Critical patent/ATE65641T1/en
Publication of EP0159598A2 publication Critical patent/EP0159598A2/en
Publication of EP0159598A3 publication Critical patent/EP0159598A3/en
Application granted granted Critical
Publication of EP0159598B1 publication Critical patent/EP0159598B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/20—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
    • H01H83/22—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages
    • H01H83/223—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being imbalance of two or more currents or voltages with bimetal elements
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7427—Adjusting only the electrothermal mechanism
    • H01H71/7445—Poly-phase adjustment

Definitions

  • the invention relates to a single-pole or multi-pole thermal overcurrent relay arranged in a divided housing with a tripping slide actuated by one or more tripping bimetallic elements which, in the form of a comb or ladder, slides in a guide provided for this purpose in the housing.
  • overcurrent relays are used to protect electrical components, e.g. Electric motors, before overloading due to impermissibly high power consumption.
  • a multi-pole thermal overcurrent relay which, arranged in a divided housing, has a tripping slide actuated by tripping bimetals and a switching mechanism which engages with it.
  • each deflection of the bimetals is to be assigned a specific value of the current intensity in accordance with the distance traveled by the trigger slide. This relationship applies as long as the geometric conditions remain the same, i.e. As long as the position of the trigger slide with respect to the guide in the housing or the bimetallic elements does not change and no additional forces are effective, the value of the overcurrent is triggered and the current is interrupted.
  • the trigger slide can be inadmissibly large and can result in its tilting, tilting or jamming.
  • Such a fault inevitably leads to a falsification of the tripping characteristic of the overcurrent relay, i.e. that tripping only occurs when the current strength is impermissibly high.
  • the object of the invention is to avoid storing different trigger slides and to simplify the adjustment process by using suitable means.
  • two adjusting elements are arranged at a distance from each other so that with their help an exact adjustment of the height play of the trigger slide is possible by raising or lowering one or the other end or both ends.
  • the adjustment of the height play of the trigger slide is carried out by means of two rigid brackets as adjusting elements which are displaceably embedded in the housing.
  • a displaceable bracket instead of a displaceable bracket, one can be provided in which the adjustment of the height play of the trigger slide by plastic Deformation takes place by means of bending. For this purpose, a wedge-like tool is pushed between the trigger slide and bracket, and thus the bracket is bent back until the dimension specified for the permissible play is achieved after removal of the wedge-shaped tool.
  • a housing 10 is shown schematically with a rectangular cross-section, in which a limited to the side and down by the housing wall 12 Partial trigger slide 14 is inserted so that it is guided in the axial direction by housing webs arranged to separate three trigger bimetals 18 with heating conductors.
  • the one-piece trigger slide 14 which rests like a ladder with its three connecting webs 26 at the free ends of the release bimetals 18, slides on the underside 20 of the housing and is thereby supported by two adjustment brackets 24 arranged on opposite side walls 22 with a nose-shaped bulge, in short nose 25, in its height play "A" limited.
  • the brackets 24 are guided in a T-shaped groove 23 which is formed in or integrally with the housing side wall 22, with expansion brackets 42, 44 provided in pairs one above the other at the guide end 40 of the adjusting bracket 24 clamping in the groove 23 and effecting a non-positive fixing of the adjusting bracket 24.
  • a vertical slot 21 can be provided on both sides in the housing side walls 22, as shown in FIG. These slots 21 lie opposite the end faces of the trigger slides 13, 14, 15 and permit visual and / or mechanical control of the height play "A" in the assembled state of the overcurrent relay.
  • a lower stop 27 can be provided to limit the sliding path of the adjusting bracket 24 downwards, which is designed so that the adjusting bracket 24 only in the region of the guide end 40 touches the stop 27, so that the cantilever arm with the nose 25 is free, ie unloaded from the stop 27, and frictional engagement with the upper edge 36 of the slide.
  • FIG. 2 shows a variant of FIG. 1 with a divided trigger slide 15, 16 as in FIG. 1.
  • This trigger slide is composed of two congruent parts 15, 16, which have a strip 13, 17, on each of which three webs 30, 32 are integrally formed , wherein both parts 15, 16 are arranged mirror-inverted to each other, so that the free ends of the webs 30, 32 on the reverse side of the opposite part 15 or 16, on which the webs 30, 32 are formed, are slidably movable in the direction of the longitudinal axis of the bar .
  • Their relative movement to one another is limited by a connecting bracket 33 connecting them, which is fastened in two joints of the bore 34 and the elongated hole 35, which serves to compensate for travel.
  • the adjustment brackets 24 are fixedly attached in the side walls and their support points 25 are brought into their end position in relation to the trigger slide 15, 16 by means of a wedge 28 pushed therebetween. The wedge 28 is then removed.
  • a top bracket 24 is shown in the position in which it is inserted into the groove 21.
  • expansion tabs 42, 44 are provided in pairs symmetrically to the longitudinal axis, which on the one hand prevent tilting in the groove 21 and on the other hand fix the adjustment bracket 24 by non-positively locking against the wall of the groove 21 invest.
  • the expansion tabs 42, 44 are pre-bent from the flat guide end 40 in the direction of the nose 25 and ensure such exact guidance.
  • the flat guide end 40 has a contact surface 46 which is convexly curved in the direction of the bracket, the upper end face of which serves to support the contact surface for the tool with which the bracket 24 is pushed into its end position enlarge.
  • This movement is transmitted from the transmission bracket 33, which connects the two parts 15, 16 of the divided trigger slide 15, 16 to one another via the joints 34, 35 in the design of overcurrent relay with phase failure protection, to the switching mechanism in the other housing half, which results in the switching off of the current leads.
  • the release slide 14, 15, 16 can tip as a result of excessive clearance A, as a result of which additional forces which must be overcome by the release bimetal 18 occur.
  • the use of the two adjusting brackets 24 is provided, which are slidably mounted within a T-shaped groove 21 arranged in or on the wall 22.
  • the stirrups are shifted towards the trigger slide until their support points 25 touch the trigger slide 14. Then they are opposed moves until the permissible dimension A is reached.
  • This dimension A is synonymous with the permissible height play.
  • a lower stop 27 can also be provided, against which the adjusting bracket 24 is displaced, it being ensured that the nose non-positively acts on the upper edge 36 of the slide.
  • a correspondingly dimensioned plate can be inserted beforehand between the nose 25 and the upper edge of the slider or subsequently inserted through the slot 21, so that the bracket 24 plastically deforms, and after removing the plate, the arrangement has the specified play.
  • the displaceably attached adjusting brackets 24 it is also possible to firmly position the brackets 24 in the housing wall 12 and to press them against the upper edge 36 of the trigger slide so that they have 25 non-positive contact at their support points. A wedge-shaped tool 28 is then pressed between the upper edge 36 of the trigger slide and the support point 25 of the adjusting bracket 24 until the permissible height play A is established. The resilience of the adjustment bracket 24 is to be considered here. After the setting, the tool 28 is removed again.

Landscapes

  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)
  • Protection Of Generators And Motors (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

An excess current thermal relay having one or more poles and arranged in a split housing, having a trip slide which is operated by one or more trip-bimetallic devices located in phase, which trip slide is designed in the form of a comb or ladder and slides in a guide provided for the purpose in the housing, the vertical play being adjustable by means of two adjustment elements (24) arranged at a distance from one another. <IMAGE>

Description

Die Erfindung betrifft ein ein- oder mehrpoliges in einem geteilten Gehäuse angeordnetes thermisches Überstromrelais mit einem von einem oder mehreren in Phase liegenden Auslöse-Bimetallen betätigten Auslöseschieber, der kamm- oder leiterartig ausgebildet in einer im Gehäuse hierfür vorgesehenen Führung gleitet.The invention relates to a single-pole or multi-pole thermal overcurrent relay arranged in a divided housing with a tripping slide actuated by one or more tripping bimetallic elements which, in the form of a comb or ladder, slides in a guide provided for this purpose in the housing.

Derartige Überstromrelais werden eingesetzt zum Schutz elektrischer Komponenten, z.B. Elektromotoren, vor Überlastung infolge unzulässig hoher Stromaufnahme.Such overcurrent relays are used to protect electrical components, e.g. Electric motors, before overloading due to impermissibly high power consumption.

Die in Phase liegenden Auslöse-Bimetalle erwärmen sich durch den jeweils fließenden Strom und lenken dementsprechend aus ihrer Ruhelage aus. Diese Lageänderung überträgt sich unmittelbar auf den ständig anliegenden Auslöseschieber, der hierbei eine Translationsbewegung ausführt, bis er den Auslösepunkt im Schaltmechanismus, mit dem er ständig im Eingriff steht, erreicht hat.The release bimetals in phase heat up due to the current flowing and deflect accordingly from their rest position. This change in position is transmitted directly to the constantly present trigger slide, which in this case carries out a translational movement until it has reached the trigger point in the switching mechanism with which it is constantly in engagement.

Bei Erreichen des Auslösepunkts wird ein Schaltmechanismus ausgelöst und der Stromfluß unterbrochen.When the trigger point is reached, a switching mechanism is triggered and the current flow is interrupted.

Aus der CH-PS 483 113 ist ein mehrpoliges thermisches Überstromrelais bekannt, das in einem geteilten Gehäuse angeordnet einen von Auslöse-Bimetallen betätigten Auslöseschieber und einen mit diesem im Eingriff stehenden Schaltmechanismus aufweist.From CH-PS 483 113 a multi-pole thermal overcurrent relay is known which, arranged in a divided housing, has a tripping slide actuated by tripping bimetals and a switching mechanism which engages with it.

Wie bereits ausgeführt, ist jeder Auslenkung der Bimetalle entsprechend einer jeweils zurückgelegten Wegstrecke des Auslöseschiebers ein bestimmter Wert der Stromstärke zuzuordnen. Dieser Zusammenhang gilt, so lange die geometrischen Bedingungen gleich bleiben, d.h. so lange sich die Lage des Auslöseschiebers in Bezug auf die Führung im Gehäuse bzw. auf die Bimetalle nicht verändert und keine zusätzlichen Kräfte wirksam werden, wird bei dem festgelegten Wert des Überstromes ausgelöst und der Strom unterbrochen.As already stated, each deflection of the bimetals is to be assigned a specific value of the current intensity in accordance with the distance traveled by the trigger slide. This relationship applies as long as the geometric conditions remain the same, i.e. As long as the position of the trigger slide with respect to the guide in the housing or the bimetallic elements does not change and no additional forces are effective, the value of the overcurrent is triggered and the current is interrupted.

Bei dem bekannten thermischen Überstromrelais kann es infolge ungünstigen Zusammentreffens von Toleranzen bzw. durch verschleißbedingte Maßabweichungen des Herstellwerkzeuges und damit der Werkstücke zu unzulässig großem Spiel des Auslöseschiebers kommen und dessen Kippen, Verkanten oder Klemmen zur Folge haben. Eine solche Störung führt zwangsläufig zu einer Verfälschung der Auslösecharateristik des Überstromrelais, d.h:, daß erst bei unzulässig hoher Stromstärke ausgelöst wird.In the known thermal overcurrent relay, as a result of unfavorable coincidence of tolerances or due to wear-related dimensional deviations of the manufacturing tool and thus of the workpieces, the trigger slide can be inadmissibly large and can result in its tilting, tilting or jamming. Such a fault inevitably leads to a falsification of the tripping characteristic of the overcurrent relay, i.e. that tripping only occurs when the current strength is impermissibly high.

Zur Erreichung einer maximalen Auslösegenauigkeit ist es daher notwendig, die von den Bimetallen betätigten Auslöseschieber mit einem minimalen und gleichbleibenden Spiel im Gehäuse zu führen. Dies wird bekannterweise dadurch erreicht, daß aus einem Sortiment unterschiedlieh in der Höhe abgestufter Auslöseschieber der nach einem Meßvorgang als zutreffend ermittelte ausgewählt und in das Gehäuse eingesetzt wird.To achieve maximum triggering accuracy, it is therefore necessary to guide the trigger slide actuated by the bimetallic elements with a minimal and constant play in the housing. As is known, this is achieved by differentiating from an assortment borrowed in the height of the graduated trigger slide selected after a measurement process to be selected and inserted into the housing.

Aufgabe der Erfindung ist es, die Bevorratung unterschiedlicher Auslöseschieber zu vermeiden und durch Einsatz geeigneter Mittel den Justiervorgang zu vereinfachen.The object of the invention is to avoid storing different trigger slides and to simplify the adjustment process by using suitable means.

Die Lösung der Aufgabe besteht erfindungsgemäß in dem kennzeichnenden Teil des Anspruches 1.The object is achieved according to the invention in the characterizing part of claim 1.

Danach werden zwei Justierelemente im Abstand zueinander so angeordnet, daß mit ihrer Hilfe eine exakte Einstellung des Höhenspiels des Auslöseschiebers durch Anheben oder Absenken des einen oder des anderen Endes oder beider Enden möglich ist.Then two adjusting elements are arranged at a distance from each other so that with their help an exact adjustment of the height play of the trigger slide is possible by raising or lowering one or the other end or both ends.

Eine konkrete Ausführungsform des Erfindungsgedankens ist nachstehend beschrieben.A specific embodiment of the inventive concept is described below.

Hierbei wird mittels zweier biegesteifer Bügel als Justierelemente, die in das Gehäuse verschiebbar eingelassen sind, die Einstellung des Höhenspiels des Auslöseschiebers vorgenommen.In this case, the adjustment of the height play of the trigger slide is carried out by means of two rigid brackets as adjusting elements which are displaceably embedded in the housing.

Bei der Bewegung des Auslöseschiebers auftretende Kräfte aus Kippmomenten des Auslöseschiebers werden jeweils punktförmig von an den Bügeln ausgewölbten Nasen aufgenommen. Da die Bügel nach ihrer Justierung fest im Gehäuse fixiert sind, bleibt das aus Fertigungstoleranzen resultierende einmal korrigierte Höhenspiel über die gesamte Betriebsdauer des Uberstrom-Relais konstant.Forces occurring during the movement of the trigger slide from tilting moments of the trigger slide are each picked up point by point by lugs bulging on the brackets. Since the brackets are firmly fixed in the housing after their adjustment, the height play, once corrected from manufacturing tolerances, remains constant over the entire operating time of the overcurrent relay.

Gleichwohl kann anstelle eines verschiebbaren Bügels ein solcher vorgesehen werden, bei dem die Einstellung des Höhenspiels des Auslöseschiebers durch plastische Verformung mittels Biegung erfolgt. Hierzu wird ein keilartiges Werkzeug zwischen Auslöseschieber und Bügel geschoben, und damit der Bügel soweit zurückgebogen, bis das für das zulässige Spiel festgelegte Maß nach Entfernen des keilförmigen Werkzeuges sich einstellt.Nevertheless, instead of a displaceable bracket, one can be provided in which the adjustment of the height play of the trigger slide by plastic Deformation takes place by means of bending. For this purpose, a wedge-like tool is pushed between the trigger slide and bracket, and thus the bracket is bent back until the dimension specified for the permissible play is achieved after removal of the wedge-shaped tool.

Anhand der in der Zeichnung dargestellten Ausführungsbeispiele sollen die Erfindung sowie weitere vorteilhafte Ausgestaltungen und Verbesserungen der Erfindung näher erläutert und beschrieben werden.On the basis of the exemplary embodiments shown in the drawing, the invention and further advantageous refinements and improvements of the invention are to be explained and described in more detail.

Es zeigt:

  • Fig. 1 eine Schnittansicht durch eine Gehäusehälfte eines dreipoligen Überstromrelais ohne Phasenausfallschutz in der Ausführung mit zwei verschiebbaren Bügeln als Justierelemente; die andere Gehäusehälfte mit dem Schaltmechanismus ist nicht dargestellt;
  • Fig. 2 eine Schnittansicht durch eine Gehäusehälfte eines dreipoligen Überstromrelais mit Phasenausfallschutz in der Ausführung mit zwei Bügeln als Justierelementen, die zur Einstellung des Höhenspiels A mittels einem keilförmigem Werkzeug gebogen werde; die andere Gehäusehälfte mit dem Schaltmechanismus ist nicht dargestellt,
  • Fig. 3 eine Draufsicht auf einen Justierbügel gemäß Fig. 1,
  • Fig. 4 eine Seitenansicht eines Justierbügels gemäß Fig. 3.
It shows:
  • Figure 1 is a sectional view through a housing half of a three-pole overcurrent relay without phase failure protection in the version with two displaceable brackets as adjusting elements. the other half of the housing with the switching mechanism is not shown;
  • 2 shows a sectional view through a housing half of a three-pole overcurrent relay with phase failure protection in the version with two brackets as adjusting elements which are bent by means of a wedge-shaped tool to adjust the height clearance A; the other housing half with the switching mechanism is not shown,
  • 3 is a plan view of an adjustment bracket according to FIG. 1,
  • 4 shows a side view of an adjusting bracket according to FIG. 3.

In Figur 1 ist ein Gehäuse 10 mit rechteckigem Querschnitt schematisch dargestellt, in das zur Seite und nach unten durch die Gehäusewand 12 begrenzt ein einteiliger Auslöseschieber 14, so eingesetzt ist, daß er von zur Trennung dreier Auslösebimetalle 18 mit Heizleiter angeordneten Gehäusestegen in axialer Richtung geführt ist.In Figure 1, a housing 10 is shown schematically with a rectangular cross-section, in which a limited to the side and down by the housing wall 12 Partial trigger slide 14 is inserted so that it is guided in the axial direction by housing webs arranged to separate three trigger bimetals 18 with heating conductors.

Der einteilige Auslöseschieber 14, der leiterähnlich mit seinen drei Verbindungsstegen 26 an den freien Enden der Auslösebimetalle 18 anliegt, gleitet auf der Gehäuseunterseite 20 und wird hierbei von zwei an sich gegenüberliegenden Gehäuseseitenwänden 22 angeordneten Justierbügeln 24 mit nasenförmiger Auswölbung, kurz Nase 25, in seinem Höhenspiel "A" begrenzt.The one-piece trigger slide 14, which rests like a ladder with its three connecting webs 26 at the free ends of the release bimetals 18, slides on the underside 20 of the housing and is thereby supported by two adjustment brackets 24 arranged on opposite side walls 22 with a nose-shaped bulge, in short nose 25, in its height play "A" limited.

Die Bügel 24 werden in einer in die Gehäuseseitenwand 22 ein- oder angeformten T-förmigen Nut 23 geführt, wobei paarweise übereinander am Führungsende 40 des Justierbügels 24 vorgesehene Spreizlaschen 42, 44 sich in der Nut 23 festklemmen und eine kraftschlüssige Fixierung des Justierbügels 24 bewirken.The brackets 24 are guided in a T-shaped groove 23 which is formed in or integrally with the housing side wall 22, with expansion brackets 42, 44 provided in pairs one above the other at the guide end 40 of the adjusting bracket 24 clamping in the groove 23 and effecting a non-positive fixing of the adjusting bracket 24.

Den Abschluß nach oben bildet eine nicht dargestellte Zwischenplatte, die das Gehäuseunterteil 10 vom nicht dargestellten Gehäuseoberteil trennt und bei der Montage bündig abschließend zwischengelegt wird.The conclusion at the top is formed by an intermediate plate, not shown, which separates the lower housing part 10 from the upper housing part, not shown, and is finally inserted flush during assembly.

Zu Montage- und Justagezwecken kann beiderseits in die Gehäuseseitenwände 22 wie in Figur 1 gezeigt ein senkrechter Schlitz 21 vorgesehen sein. Diese Schlitze 21 liegen den Stirnflächen der Auslöseschieber 13, 14, 15 gegenüber und gestatten eine visuelle und/oder mechanische Kontrolle des Höhenspiels "A" im montierten Zustand des Überstromrelais.For assembly and adjustment purposes, a vertical slot 21 can be provided on both sides in the housing side walls 22, as shown in FIG. These slots 21 lie opposite the end faces of the trigger slides 13, 14, 15 and permit visual and / or mechanical control of the height play "A" in the assembled state of the overcurrent relay.

In weiterer vorteilhafter Ausgestaltung der Erfindung kann zur Begrenzung des Schiebeweges des Justierbügels 24 nach unten ein unterer Anschlag 27 vorgesehen sein, der so gestaltet ist, daß der Justierbügel 24 nur im Bereich des Führungsendes 40 den Anschlag 27 berührt, so daß der Kragarm mit der Nase 25 frei ist, d.h. unbelastet vom Anschlag 27, und Kraftschluß mit der Schieberoberkante 36 erfährt.In a further advantageous embodiment of the invention, a lower stop 27 can be provided to limit the sliding path of the adjusting bracket 24 downwards, which is designed so that the adjusting bracket 24 only in the region of the guide end 40 touches the stop 27, so that the cantilever arm with the nose 25 is free, ie unloaded from the stop 27, and frictional engagement with the upper edge 36 of the slide.

Figur 2 zeigt eine Variante zu Figur 1 mit geteiltem Auslöseschieber 15, 16 wie in Figur 1. Dieser Auslöseschieber ist zusammengesetzt aus zwei kongruenten Teilen 15, 16, die eine Leiste 13, 17 aufweisen, an der kammartig je drei Stege 30, 32 angeformt sind, wobei beide Teile 15, 16 spiegelverkehrt zueinander angeordnet sind, so daß jeweils die freien Enden der Stege 30, 32 auf der Umseite des gegenüberliegenden Teiles 15 oder 16, an der die Stege 30, 32 angeformt sind, gleitend in Richtung der Leistenlängsachse beweglich sind. Dabei wird ihre Relativbewegung zueinander von einem sie verbindenden Übertragungsbügel 33 begrenzt, der in zwei Gelenken der Bohrung 34 und dem Langloch 35, das dem Wegausgleich dient, befestigt ist. Bei dieser Variante sind die Justierbügel 24 fest in den Seitenwänden angebracht und ihre Auflagepunkte 25 in Bezug auf den Auslöseschieber 15, 16 mittels dazwischengeschobenem Keil 28 in ihre Endlage gebracht. Danach wird der Keil 28 entfernt.FIG. 2 shows a variant of FIG. 1 with a divided trigger slide 15, 16 as in FIG. 1. This trigger slide is composed of two congruent parts 15, 16, which have a strip 13, 17, on each of which three webs 30, 32 are integrally formed , wherein both parts 15, 16 are arranged mirror-inverted to each other, so that the free ends of the webs 30, 32 on the reverse side of the opposite part 15 or 16, on which the webs 30, 32 are formed, are slidably movable in the direction of the longitudinal axis of the bar . Their relative movement to one another is limited by a connecting bracket 33 connecting them, which is fastened in two joints of the bore 34 and the elongated hole 35, which serves to compensate for travel. In this variant, the adjustment brackets 24 are fixedly attached in the side walls and their support points 25 are brought into their end position in relation to the trigger slide 15, 16 by means of a wedge 28 pushed therebetween. The wedge 28 is then removed.

In Bild 3 ist in Draufsicht ein Justierbügel 24 in der Lage abgebildet, in der er in die Nut 21 eingesetzt wird. An dem wie aus Bild 4 ersichtlich abgewinkelten Führungsende 40 sind paarweise symmetrisch zur Längsachse Spreizlaschen 42, 44 vorgesehen, die einerseits das Verkanten in der Nut 21 verhindern und andererseits die Fixierung des Justierbügels 24 bewirken, in dem sie sich kraftschlüssig an die Wandung der Nut 21 anlegen. Die Spreizlaschen 42, 44 werden aus dem ebenen Führungsende 40 in Richtung Nase 25 vorgebogen und gewährleisten so eine exakte Führung. Im mittleren Bereich zwischen den oberen Spreizlaschen 42, weist das ebene Führungsende 40 eine konvex.nach vone in Bügelrichtung gewölbte Anlagefläche 46 auf, deren obere Stirnfläche dazu dient, die Auflagefläche für das Werkzeug, mit dem der Bügel 24 in seine Endposition geschoben wird, zu vergrößern.In Figure 3, a top bracket 24 is shown in the position in which it is inserted into the groove 21. At the angled guide end 40 as shown in FIG. 4, expansion tabs 42, 44 are provided in pairs symmetrically to the longitudinal axis, which on the one hand prevent tilting in the groove 21 and on the other hand fix the adjustment bracket 24 by non-positively locking against the wall of the groove 21 invest. The expansion tabs 42, 44 are pre-bent from the flat guide end 40 in the direction of the nose 25 and ensure such exact guidance. In the central area between the upper expansion tabs 42, the flat guide end 40 has a contact surface 46 which is convexly curved in the direction of the bracket, the upper end face of which serves to support the contact surface for the tool with which the bracket 24 is pushed into its end position enlarge.

Für beide dargestellten Beispiele gilt das eingangs erwähnte Funktionsprinzip, d.h., daß die Auslösebimetalle 18 bei eingeschaltetem Strom von diesem entweder direkt (konduktiv) oder indirekt (Beheizung durch Widerstandsdraht) erwärmt und in Pfeilrichtung B ausgelenkt werden, wobei die stets anliegenden Stege 26, 30, 32 des Auslöseschiebers 14, 15, 16 horizontal geführt die gleiche Bewegung erfahren.The principle of operation mentioned at the outset applies to both of the examples shown, that is to say that when the current is switched on, the tripping bimetals 18 are either directly (conductively) or indirectly (heated by resistance wire) heated and deflected in the direction of arrow B, the webs 26, 30, 32 of the trigger slide 14, 15, 16 guided horizontally experience the same movement.

Diese Bewegung wird von dem Übertragungsbügel 33, der in der Ausführung Überstromrelais mit Phasenausfallschutz die beiden Teile 15, 16 des geteilten Auslöseschiebers 15, 16 über die Gelenke 34, 35 miteinander verbindet, auf den Schaltmechanismus in der anderen Gehäusehälfte übertragen, was zum Abschalten des Stromes führt.This movement is transmitted from the transmission bracket 33, which connects the two parts 15, 16 of the divided trigger slide 15, 16 to one another via the joints 34, 35 in the design of overcurrent relay with phase failure protection, to the switching mechanism in the other housing half, which results in the switching off of the current leads.

Bei dieser Bewegung kann es infolge zu großen Höhenspiels A zu einem Kippen des Auslöseschiebers 14, 15, 16 kommen, wodurch zusätzliche Kräfte, die von dem Auslöse-bimetall 18 überwunden werden müssen, auftreten.During this movement, the release slide 14, 15, 16 can tip as a result of excessive clearance A, as a result of which additional forces which must be overcome by the release bimetal 18 occur.

Um dieses unzulässige Spiel zu begrenzen, ist der Einsatz von den beiden Justierbügeln 24 vorgesehen, die innerhalb einer in oder auf der Wand 22 angeordneten T-förmigen Nut 21 verschiebbar angebracht sind. Hierbei werden die Bügel soweit in Richtung Auslöseschieber verschoben, bis ihre Auflagepunkte 25 den Auslöseschieber 14 berühren. Anschließend werden sie entgegengesetzt bewegt bis das zulässige Maß A erreicht ist. Dieses Maß A ist gleichbedeutend mit dem zulässigen Höhenspiel.In order to limit this impermissible play, the use of the two adjusting brackets 24 is provided, which are slidably mounted within a T-shaped groove 21 arranged in or on the wall 22. In this case, the stirrups are shifted towards the trigger slide until their support points 25 touch the trigger slide 14. Then they are opposed moves until the permissible dimension A is reached. This dimension A is synonymous with the permissible height play.

Alternativ hierzu kann auch ein unterer Anschlag 27 vorgesehen sein, gegen den der Justierbügel 24 verschoben wird, wobei sichergestellt ist, daß die Nase die Schieberoberkante 36 kraftschlüssig beaufschlagt. Zur Einstellung des Höhenspiels A kann ein entsprechend bemessenes Plättchen vorher zwischen Nase 25 und Schieberoberkante eingelegt oder anschließend durch den Schlitz 21 zwischengeschoben sein, so daß der Bügel 24 sich plastisch verformt, und nach Entfernen des Plättchens die Anordnung das festgelegt Spiel aufweist.As an alternative to this, a lower stop 27 can also be provided, against which the adjusting bracket 24 is displaced, it being ensured that the nose non-positively acts on the upper edge 36 of the slide. To adjust the height play A, a correspondingly dimensioned plate can be inserted beforehand between the nose 25 and the upper edge of the slider or subsequently inserted through the slot 21, so that the bracket 24 plastically deforms, and after removing the plate, the arrangement has the specified play.

Als Variante zu den verschiebbar angebrachten Justierbügeln 24 ist es auch möglich, die Bügel 24 in der Gehäusewand 12 fest zu positionieren und sie an die Auslöseschieberoberkante 36 so weit anzudrücken, daß sie in ihren Auflagepunkten 25 Kraftschluß haben. Anschließend wird ein keilförmiges Werkzeug 28 zwischen Auslöseschieberoberkante 36 und Auflagepunkt 25 des Justierbügels 24 gedrückt, bis sich das zulässige Höhenspiel A einstellt. Die Rückfederung des Justierbügels 24 ist hierbei in Betracht zu ziehen. Nach dem Einstellen wird das Werkzeug 28 wieder entfernt.As a variant of the displaceably attached adjusting brackets 24, it is also possible to firmly position the brackets 24 in the housing wall 12 and to press them against the upper edge 36 of the trigger slide so that they have 25 non-positive contact at their support points. A wedge-shaped tool 28 is then pressed between the upper edge 36 of the trigger slide and the support point 25 of the adjusting bracket 24 until the permissible height play A is established. The resilience of the adjustment bracket 24 is to be considered here. After the setting, the tool 28 is removed again.

Claims (8)

1. Ein- oder mehrpoliges in einem geteilten Gehäuse angeordnetes thermisches Überstromrelais mit einem von einem oder mehreren in Phase liegenden Auslöse-Bimetallen betätigten Auslöseschieber, der kamm- oder leiterartig ausgebildet in einer im Gehäuse hierfür vorgesehenen Führung gleitet, dadurch gekennzeichnet, daß das Höhenspiel des Auslöseschiebers ( 14, 15, 16) mittels zweier im Abstand zueinander angeordneter Justierelemente (24) einstellbar ist.1. Single or multi-pole arranged in a split housing thermal overcurrent relay with one of one or more in-phase tripping bimetallic tripping slide, which is designed like a comb or ladder, slides in a guide provided for this purpose in the housing, characterized in that the vertical clearance of the Trigger slide (14, 15, 16) is adjustable by means of two adjusting elements (24) arranged at a distance from one another. 2. Thermisches Überstromrelais, nach Anspruch 1, dadurch gekennzeichnet, daß die Justierelemente biegesteife Bügel (24) mit nasenförmiger Auswölbung (25) sind, die in der Gehäusewand (12) innerhalb einer T-förmigen Nut (23) verschiebbar und in jeder Position (22) mittels Spreizlaschen (42, 44) kraftschlüssig fixierbar sind.2. Thermal overcurrent relay, according to claim 1, characterized in that the adjusting elements are rigid stirrups (24) with nose-shaped bulge (25) which are displaceable in the housing wall (12) within a T-shaped groove (23) and in any position ( 22) can be non-positively fixed by means of expansion tabs (42, 44). 3. Thermisches Überstromrelais nach Anspruch 1, dadurch gekennzeichnet, daß die Justierelemente als Bügel (24) mit nasenförmiger Auswölbung (25) ausgebildet sind, die eine feste Position (38) im Gehäuse (10) einnehmen, und die zur Einstellung des Höhenspiels des Auslöseschiebers (14, 15, 16) mittels Biegen plastisch verformt sind.3. Thermal overcurrent relay according to claim 1, characterized in that the adjusting elements are designed as a bracket (24) with a nose-shaped bulge (25), which occupy a fixed position (38) in the housing (10), and for adjusting the height play of the trigger slide (14, 15, 16) are plastically deformed by means of bending. 4. Thermisches Überstromrelais nach Anspruch 3, dadurch gekennzeichnet, daß zur Einstellung des Höhenspiels zwischen dem Auslöseschieber (14, 15, 16) und der Nase (25) der Justierelemente (24) ein keilförmiges Werkzeug (28) vorgesehen ist, das zwischen den Nasen (25) und der Oberkante B (36) des Auslöseschiebers einschiebbar ist und dabei die Bügel (24) plastisch soweit verformt, daß das für das zulässige Höhenspiel A festgelegte Maß nach Entfernen des Werkzeuges (28) sich einstellt.4. Thermal overcurrent relay according to claim 3, characterized in that for adjusting the heights game between the trigger slide (14, 15, 16) and the nose (25) of the adjusting elements (24) a wedge-shaped tool (28) is provided which can be inserted between the lugs (25) and the upper edge B (36) of the trigger slide and the brackets (24) are plastically deformed to such an extent that the dimension defined for the permissible height play A is obtained after removal of the tool (28). 5. Thermisches Überstromrelais nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Justierelemente (24) so im Gehäuse (10) angeordnet sind, daß die Begrenzung des Höhenspiels A des Auslöseschiebers (14, 15, 16) stets an dessen Enden einzustellen ist.5. Thermal overcurrent relay according to one of claims 1 to 4, characterized in that the adjusting elements (24) are arranged in the housing (10) so that the limitation of the height play A of the trigger slide (14, 15, 16) always set at the ends thereof is. 6. Thermisches Überstromrelais nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß zur Einstellung der Justierelemente (24) beiderseits ein Anschlag (27) vorgesehen ist, gegen den die Justierelemente sich anlegen.6. Thermal overcurrent relay according to one of the preceding claims, characterized in that a stop (27) is provided on both sides for adjusting the adjusting elements (24), against which the adjusting elements come to rest. 7. Thermisches Überstromrelais nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß zur Einstellung des Höhenspiels Endmaße vorgesehen sind, die zwischen Nase (25) und Schieberoberkante einschiebbar oder einlegbar sind.7. Thermal overcurrent relay according to one of the preceding claims, characterized in that gauge blocks are provided for adjusting the height play, which can be inserted or inserted between the nose (25) and the upper edge of the slide. 8. Thermisches Überstromrelais nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, daß zur Einstellung des Höhenspiels bzw. zu seiner visuellen und/oder mechanischen Kontrolle Schlitze (21) in den Seitenwänden (22) vorgesehen sind, die den Stirnflächen der Auslöseschieber (14, 15, 16) gegenüberliegen.8. Thermal overcurrent relay according to one of the preceding claims, characterized in that for adjusting the height play or for its visual and / or mechanical control slots (21) are provided in the side walls (22) which face the end faces of the trip slides (14, 15th , 16) face each other.
EP85104125A 1984-04-21 1985-04-04 Excess current thermal relay with adjusting bracket Expired - Lifetime EP0159598B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85104125T ATE65641T1 (en) 1984-04-21 1985-04-04 THERMAL OVERCURRENT RELAY WITH ADJUSTING BRACKET.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843415226 DE3415226A1 (en) 1984-04-21 1984-04-21 THERMAL OVERCURRENT RELAY WITH ADJUSTMENT BRACKET
DE3415226 1984-04-21

Publications (3)

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EP0159598A2 true EP0159598A2 (en) 1985-10-30
EP0159598A3 EP0159598A3 (en) 1987-09-16
EP0159598B1 EP0159598B1 (en) 1991-07-24

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ID=6234249

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Application Number Title Priority Date Filing Date
EP85104125A Expired - Lifetime EP0159598B1 (en) 1984-04-21 1985-04-04 Excess current thermal relay with adjusting bracket

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EP (1) EP0159598B1 (en)
AT (1) ATE65641T1 (en)
DE (2) DE3415226A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548479A1 (en) * 1995-12-22 1997-06-26 Siemens Ag Thermal release system
DE19949530A1 (en) * 1999-10-14 2001-04-19 Abb Patent Gmbh Guide element for triggering slider in thermal overcurrent relay, comprises slider held by cover plate which is secured on housing of overcurrent relay

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19938965A1 (en) * 1999-08-17 2001-02-22 Abb Patent Gmbh Tripping device for an electrical installation switch
DE102008031894B4 (en) * 2008-07-08 2014-03-13 Abb Ag Electrical switching device with a thermal release

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FR1596259A (en) * 1968-01-26 1970-06-15
US3638158A (en) * 1968-11-23 1972-01-25 Crabtree & Co Ltd J A Overload tripping devices for electric motor starting switches
DE3401901A1 (en) * 1984-01-20 1985-08-01 Brown, Boveri & Cie Ag, 6800 Mannheim Thermal overcurrent relay having an adjusting eccentric

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US3168355A (en) * 1961-01-09 1965-02-02 La Vern E Rudolph Slide assembly for sliding doors
US3226845A (en) * 1964-02-20 1966-01-04 Ausnit Steven Sliding fastener strips
GB1536197A (en) * 1976-02-25 1978-12-20 Cutler Hammer World Trade Inc Electrical overload switching relay
DD159662B1 (en) * 1981-06-15 1988-01-27 Pentacon Dresden Veb COMPACT PARALLEL SPRINGS OF THE MANUFACTURING ELEMENT

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Publication number Priority date Publication date Assignee Title
FR1596259A (en) * 1968-01-26 1970-06-15
US3638158A (en) * 1968-11-23 1972-01-25 Crabtree & Co Ltd J A Overload tripping devices for electric motor starting switches
DE3401901A1 (en) * 1984-01-20 1985-08-01 Brown, Boveri & Cie Ag, 6800 Mannheim Thermal overcurrent relay having an adjusting eccentric

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19548479A1 (en) * 1995-12-22 1997-06-26 Siemens Ag Thermal release system
DE19548479C2 (en) * 1995-12-22 1999-09-02 Siemens Ag Thermal release system
US6014803A (en) * 1995-12-22 2000-01-18 Siemens Ag Thermal triggering system
DE19949530A1 (en) * 1999-10-14 2001-04-19 Abb Patent Gmbh Guide element for triggering slider in thermal overcurrent relay, comprises slider held by cover plate which is secured on housing of overcurrent relay

Also Published As

Publication number Publication date
EP0159598B1 (en) 1991-07-24
DE3583522D1 (en) 1991-08-29
DE3415226A1 (en) 1985-10-31
ATE65641T1 (en) 1991-08-15
EP0159598A3 (en) 1987-09-16

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