EP0616349B1 - Circuit breaker, in particular line circuit breaker - Google Patents

Circuit breaker, in particular line circuit breaker Download PDF

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Publication number
EP0616349B1
EP0616349B1 EP93104530A EP93104530A EP0616349B1 EP 0616349 B1 EP0616349 B1 EP 0616349B1 EP 93104530 A EP93104530 A EP 93104530A EP 93104530 A EP93104530 A EP 93104530A EP 0616349 B1 EP0616349 B1 EP 0616349B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
release
thermal
tripping
point
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
EP93104530A
Other languages
German (de)
French (fr)
Other versions
EP0616349A1 (en
Inventor
Gunther Dipl.-Ing. Eckert (Fh)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to ES93104530T priority Critical patent/ES2087596T3/en
Priority to EP93104530A priority patent/EP0616349B1/en
Priority to DE59302752T priority patent/DE59302752D1/en
Priority to AT93104530T priority patent/ATE138759T1/en
Priority to TR00065/94A priority patent/TR27583A/en
Publication of EP0616349A1 publication Critical patent/EP0616349A1/en
Application granted granted Critical
Publication of EP0616349B1 publication Critical patent/EP0616349B1/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
    • H01H71/1054—Means for avoiding unauthorised release
    • 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

Definitions

  • the invention relates to a circuit breaker, in particular a circuit breaker, the switch lock working on at least one switch contact can be released by a thermal and, if appropriate, a magnetic release, for which purpose the release works on a release device by means of a release lever.
  • a circuit breaker especially circuit breakers, see e.g. B. DE-A-2 006 872.
  • the thermal release can be impaired by tolerances or by vibrations, which can be caused by impact or fall.
  • the assignment of the thermal release as an active element to the unlatching point, usually a half-wave, from which a pawl can slide when unlatching, the passive element, can be impaired by various interference parameters.
  • the entire arrangement has been accommodated between circuit boards or, on the other hand, attempts have been made to achieve suitable accommodation between the housing walls of a molded plastic housing, the circuit breaker, by means of complicated assembly and precautions. However, such an assembly is expensive.
  • the invention has for its object to improve the circuit breaker of the type described in such a way that even without circuit boards and complex assembly interference parameters can no longer significantly affect the tripping behavior of the thermal release.
  • the described task is solved by a circuit breaker according to claim 1.
  • the thermal Trigger arranged in a holder which has a freely rotatable bearing with respect to the release lever of the unlatching device.
  • the bearing lies with its fulcrum on an imaginary straight line that runs through the contact point of the thermal release on the release lever and the radius center of the contour at the contact point.
  • the radius center of the contour at the contact point is called the contour center.
  • the contour of the release lever and the geometrical location of the The points of contact of the thermal release on the release lever in an area on both sides of the intended point of contact correspond to such an extent that disturbance parameters cannot have any significant effect.
  • the insensitivity to disturbance parameters increases the closer the center of the contour and the center of rotation are. In other words, the independence from interference is greater, the closer the contour of the extension lever and the geometrical location of the contact points of the thermal release approach in a further area on both sides of the contact point.
  • the holder for the thermal release can advantageously also accommodate a magnetic release.
  • a particularly simple structure is obtained if, when a magnetic release is required, it also forms the holder for the thermal release.
  • the thermal release can be designed in the usual way as a bimetal, which acts on the release lever in the contact point during the release state. Interference parameters can have a particularly small impact if the pivot point of the bracket is designed with a particularly low tolerance and stiffness.
  • the circuit breaker according to FIG 1 has a switch lock 1 which can be released by a thermal release 2.
  • the thermal release 2 works on a unlatching device 3 by means of a release lever 4.
  • a magnetic release 5 can also work on the unlatching device 3 in a known manner, for example by means of a plunger armature 6. If the latching device 3 is unlatched by a trigger, the switch lock 1 opens a switch contact 7.
  • the thermal release 3 is arranged in a holder 8, which has a freely rotatable mounting with respect to the release lever 4, the holder 8 with its pivot point 9 lying on a straight line 10 through the contact point 11 of the thermal release 2 on the release lever 4 and the center of the radius the contour at the contact point, called contour center point 12, runs.
  • the overall structure of the magnetic release 5 also forms the holder 8 for the thermal release 3. It is advantageous if the fulcrum 9 of the holder 8 is designed to be particularly tolerant and rigid.

Abstract

A circuit breaker, in particular a line circuit breaker, whose latching mechanism (1) which operates at least one switching contact (7) can be unlatched by means of a thermal release (2) and possibly by means of a magnetic release (5), for which purpose the release acts on an unlatching device (3) by means of a tripping lever (4). It is provided - that the thermal release (3) is arranged in a hold (8) which has a freely rotatable mounting with respect to the tripping lever (4) of the unlatching device (3), - the holder (8) being located with its rotation point (9) on an imaginary straight line (10) which passes through the contact point (11) of the thermal release (2) on the tripping lever (4) and the centre of the radius of the contour on the contact point (11), called the contour centre point (12). <IMAGE>

Description

Die Erfindung bezieht sich auf einen Schutzschalter, insbesondere Leitungsschutzschalter, dessen auf zumindest einen Schaltkontakt arbeitendes Schaltschloß durch einen thermischen und gegebenfalls einen magnetischen Auslöser entklinkbar ist, wozu der Auslöser auf einer Entklinkungsvorrichtung mittels eines Auslösehebels arbeitet. Eine derartige Anordnung ist bei Schutzschaltern, insbesondere bei Leitungsschutzschaltern üblich, siehe z. B. DE-A-2 006 872.The invention relates to a circuit breaker, in particular a circuit breaker, the switch lock working on at least one switch contact can be released by a thermal and, if appropriate, a magnetic release, for which purpose the release works on a release device by means of a release lever. Such an arrangement is common in circuit breakers, especially circuit breakers, see e.g. B. DE-A-2 006 872.

Die thermische Auslösung kann durch Toleranzen oder durch Erschütterungen, wie sie durch Stoß oder Fall verursacht werden können, beeinträchtigt werden. Hierbei kann die Zuordnung des thermischen Auslösers als aktives Element zur Entklinkungsstelle, in der Regel eine Halbwelle, von der eine Klinke beim Entklinken abgleiten kann, dem passiven Element, durch verschiedene Störparameter beeinträchtigt werden. Um derartige Störungen in Grenzen zu halten, hat man zum einen die gesamte Anordnung zwischen Platinen untergebracht oder zum anderen durch komplizierte Montage und Vorkehrungen versucht, eine geeignete Unterbringung zwischen den Gehäusewänden eines Gehäuses aus Formstoff, des Schutzschalters, zu erreichen. Eine derartige Montage ist jedoch aufwendig.The thermal release can be impaired by tolerances or by vibrations, which can be caused by impact or fall. The assignment of the thermal release as an active element to the unlatching point, usually a half-wave, from which a pawl can slide when unlatching, the passive element, can be impaired by various interference parameters. In order to keep such malfunctions within limits, the entire arrangement has been accommodated between circuit boards or, on the other hand, attempts have been made to achieve suitable accommodation between the housing walls of a molded plastic housing, the circuit breaker, by means of complicated assembly and precautions. However, such an assembly is expensive.

Der Erfindung liegt die Aufgabe zugrunde, den Schutzschalter der Eingangs geschilderten Art so zu verbessern, daß auch ohne Platinen und aufwendige Montage Störparameter das Auslöseverhalten des thermischen Auslösers nicht mehr nennenswert beeinträchtigen können.The invention has for its object to improve the circuit breaker of the type described in such a way that even without circuit boards and complex assembly interference parameters can no longer significantly affect the tripping behavior of the thermal release.

Die Lösung der geschilderten Aufgabe erfolgt durch einen Schutzschalter nach Patentanspruch 1. Hierbei ist der thermische Auslöser in einer Halterung angeordnet, die eine frei drehbare Lagerung bezüglich des Auslösehebels der Entklinkungseinrichtung aufweist. Die Lagerung liegt mit ihrem Drehpunkt auf einer gedachten Geraden, die durch den Anlagepunkt des thermischen Auslösers am Auslösehebel und den Radiusmittelpunkt der Kontur am Anlagepunkt verläuft. Der Radiusmittelpunkt der Kontur am Anlagepunkt wird Konturmittelpunkt genannt. Durch den einen festen Bezugspunkt für den thermischen Auslöser, nämlich durch den Drehpunkt der Lagerung des thermischen Auslösers zum einen und durch die Anordnung des Drehpunktes und des Konturmittelpunktes sowie des Anlagepunktes auf einer Geraden, zum anderen, stimmen die Kontur des Auslösehebels und der geometrische Ort der Anlagepunkte des thermischen Auslösers am Auslösehebel in einem Bereich beidseits des vorgesehenen Anlagepunktes soweit überein, daß sich Störparameter nicht nennenswert auswirken können. Die Unempfindlichkeit gegen Störparameter wird umso größer, je näher der Konturmittelpunkt und der Drehmittelpunkt beisammenliegen. Mit anderen Worten wird die Unabhängigkeit von Störeinflüssen umso größer, je weiter sich die Kontur des Auslegehebels und der geometrische Ort der Anlagepunkte des thermischen Auslösers auch in einem weiteren Bereich beidseits des Anlagepunktes annähern.The described task is solved by a circuit breaker according to claim 1. Here is the thermal Trigger arranged in a holder which has a freely rotatable bearing with respect to the release lever of the unlatching device. The bearing lies with its fulcrum on an imaginary straight line that runs through the contact point of the thermal release on the release lever and the radius center of the contour at the contact point. The radius center of the contour at the contact point is called the contour center. Due to the one fixed reference point for the thermal release, namely the pivot point of the mounting of the thermal release on the one hand and the arrangement of the pivot point and the contour center point as well as the contact point on a straight line, on the other hand, the contour of the release lever and the geometrical location of the The points of contact of the thermal release on the release lever in an area on both sides of the intended point of contact correspond to such an extent that disturbance parameters cannot have any significant effect. The insensitivity to disturbance parameters increases the closer the center of the contour and the center of rotation are. In other words, the independence from interference is greater, the closer the contour of the extension lever and the geometrical location of the contact points of the thermal release approach in a further area on both sides of the contact point.

Die Halterung für den thermischen Auslöser kann vorteilhafterweise auch einen magnetischen Auslöser aufnehmen. Ein besonders einfacher Aufbau ergibt sich, wenn bei einem erforderlichen magnetischen Auslöser dieser zugleich die Halterung für den thermischen Auslöser bildet. Der thermische Auslöser kann in üblicher Weise als Bimetall ausgeführt sein, das am Auslösehebel im Anlagepunkt während des Auslösezustands angreift. Störparameter können sich besonders wenig auswirken, wenn der Drehpunkt der Halterung besonders toleranzarm und steif ausgeführt wird.The holder for the thermal release can advantageously also accommodate a magnetic release. A particularly simple structure is obtained if, when a magnetic release is required, it also forms the holder for the thermal release. The thermal release can be designed in the usual way as a bimetal, which acts on the release lever in the contact point during the release state. Interference parameters can have a particularly small impact if the pivot point of the bracket is designed with a particularly low tolerance and stiffness.

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

In FIG 1
ist ein Schutzschalter in Seitenansicht und bei teilweise aufgebrochenem Gehäuse veranschaulicht.
In FIG 2
ist für ein Ausführungsbeispiel eine Einzelheit wiedergegeben, nämlich ein besonders gestalteter Auslösehebel in Verbindung mit dem geometrischen Ort der Anlagepunkte des thermischen Auslösers in der Ausführung als Bimetall.
The invention will now be explained in greater detail on the basis of exemplary embodiments shown roughly schematically in the drawing:
In FIG. 1
is a circuit breaker in side view and illustrated with the housing partially broken.
In FIG. 2
a detail is given for an exemplary embodiment, namely a specially designed release lever in connection with the geometric location of the contact points of the thermal release in the form of a bimetal.

Der Schutzschalter nach FIG 1 weist ein Schaltschloß 1 auf, das durch einen thermischen Auslöser 2 entklinkbar ist. Hierzu arbeitet der thermische Auslöser 2 auf eine Entklinkungvorrichtung 3 mittels eines Auslösehebels 4. Auf die Entklinkungsvorrichtung 3 kann auch in bekannter Weise ein magnetischer Auslöser 5 beispielsweise durch einen Tauchanker 6, arbeiten. Wenn, die Klinkungsvorrichtung 3 durch einen Auslöser entklinkt wird, öffnet das Schaltschloß 1 einen Schaltkontakt 7.The circuit breaker according to FIG 1 has a switch lock 1 which can be released by a thermal release 2. For this purpose, the thermal release 2 works on a unlatching device 3 by means of a release lever 4. A magnetic release 5 can also work on the unlatching device 3 in a known manner, for example by means of a plunger armature 6. If the latching device 3 is unlatched by a trigger, the switch lock 1 opens a switch contact 7.

Der thermische Auslöser 3 ist in einer Halterung 8 angeordnet, die eine frei drehbare Lagerung bezüglich des Auslösehebels 4 aufweist, wobei die Halterung 8 mit ihrem Drehpunkt 9 auf einer Geraden 10 liegt die durch den Anlagepunkt 11 des thermischen Auslösers 2 am Auslösehebel 4 und den Radiusmittelpunkt der Kontur am Anlagepunkt, Konturmittelpunkt 12 genannt, verläuft.The thermal release 3 is arranged in a holder 8, which has a freely rotatable mounting with respect to the release lever 4, the holder 8 with its pivot point 9 lying on a straight line 10 through the contact point 11 of the thermal release 2 on the release lever 4 and the center of the radius the contour at the contact point, called contour center point 12, runs.

Wenn der Konturmittelpunkt 12 und der Drehpunkt 9 dicht beisammen liegen, wie es in Figur 2 veranschaulicht ist, stimmen die Kontur des Auslösehebels 4 und der geometrische Ort 13 der Anlagepunkte 11 eines thermischen Auslösers, beispielsweise eines Bimetallstreifens, weitgehend überein.If the center of contour 12 and the center of rotation 9 lie close together, as illustrated in FIG. 2, the contour of the release lever 4 and the geometrical location 13 of the contact points 11 of a thermal release, for example a bimetallic strip, largely coincide.

Im Ausführungsbeispiel nach Figur 1 bildet der magnetische Auslöser 5 in seinem Gesamtaufbau zugleich die Halterung 8 für den thermischen Auslöser 3. Es ist günstig, wenn der Drehpunkt 9 der Halterung 8 besonders toleranzarm und steif ausgeführt wird.In the exemplary embodiment according to FIG. 1, the overall structure of the magnetic release 5 also forms the holder 8 for the thermal release 3. It is advantageous if the fulcrum 9 of the holder 8 is designed to be particularly tolerant and rigid.

Claims (6)

  1. Circuit breaker, in particular a line circuit breaker, the breaker mechanism (1) of which, operating on at least one switching contact (7), can be released by a thermal and perhaps a magnetic tripping device (2; 5), for which purpose the tripping device operates on a release device (3) by means of a tripping lever (4),
    characterized in that
    - the thermal tripping device (2) is arranged in a support (8) which has a freely rotatable bearing with respect to the tripping lever (4) of the release device (3),
    - whereby the support (8) lies with its pivot (9) on an assumed straight line (10), which extends through the point of contact (11) of the thermal tripping device (2) on the tripping lever (4) and the radius centre of the contour at the point of contact (11), called contour centre (12).
  2. Circuit breaker according to claim 1,
    characterized in that the contour centre (12) and the pivot (9) lie close together.
  3. Circuit breaker according to claim 1 or 2,
    characterized in that the support (8) of the thermal tripping device (2) also accommodates a magnetic tripping device (5).
  4. Circuit breaker according to claim 1 or 2,
    characterized in that a magnetic tripping device (5) forms the support (8) for the thermal tripping device (3).
  5. Circuit breaker according to claim 1 or 2,
    characterized in that the thermal tripping device (2) is designed as bimetal which engages at the point of contact (11) of the tripping lever (4) in the tripping state.
  6. Circuit breaker according to claim 1 or 2,
    characterized in that the pivot (9) of the support (8) is designed to be particularly low in tolerance and rigid.
EP93104530A 1993-03-19 1993-03-19 Circuit breaker, in particular line circuit breaker Expired - Lifetime EP0616349B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
ES93104530T ES2087596T3 (en) 1993-03-19 1993-03-19 PROTECTION SWITCH, ESPECIALLY AUTOMATIC PROTECTION SWITCH.
EP93104530A EP0616349B1 (en) 1993-03-19 1993-03-19 Circuit breaker, in particular line circuit breaker
DE59302752T DE59302752D1 (en) 1993-03-19 1993-03-19 Circuit breakers, especially circuit breakers
AT93104530T ATE138759T1 (en) 1993-03-19 1993-03-19 CIRCUIT BREAKERS, PARTICULARLY CIRCUIT CIRCUIT BREAKERS
TR00065/94A TR27583A (en) 1993-03-19 1994-01-27 Kruma switch, especially line protection switch.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93104530A EP0616349B1 (en) 1993-03-19 1993-03-19 Circuit breaker, in particular line circuit breaker

Publications (2)

Publication Number Publication Date
EP0616349A1 EP0616349A1 (en) 1994-09-21
EP0616349B1 true EP0616349B1 (en) 1996-05-29

Family

ID=8212716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93104530A Expired - Lifetime EP0616349B1 (en) 1993-03-19 1993-03-19 Circuit breaker, in particular line circuit breaker

Country Status (5)

Country Link
EP (1) EP0616349B1 (en)
AT (1) ATE138759T1 (en)
DE (1) DE59302752D1 (en)
ES (1) ES2087596T3 (en)
TR (1) TR27583A (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1465967B2 (en) * 1964-12-04 1971-06-03 Licentia Patent Verwaltungs GmbH, 6000 Frankfurt AUTOMATIC INSTALLATION SWITCH WITH A PLASTIC HOUSING
DE2006872A1 (en) * 1970-02-14 1971-09-09 Licentia Gmbh Switch parts stored in plastic
US3950714A (en) * 1974-09-18 1976-04-13 Westinghouse Electric Corporation Self-adjusting circuit breaker with rotating trip assembly
US5059933A (en) * 1990-09-14 1991-10-22 General Electric Company Molded case circuit breaker operating cradle configuration

Also Published As

Publication number Publication date
DE59302752D1 (en) 1996-07-04
EP0616349A1 (en) 1994-09-21
TR27583A (en) 1995-06-13
ES2087596T3 (en) 1996-07-16
ATE138759T1 (en) 1996-06-15

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