EP0473619A1 - Mecanisme de commutation pour disjoncteur de protection. - Google Patents

Mecanisme de commutation pour disjoncteur de protection.

Info

Publication number
EP0473619A1
EP0473619A1 EP90906912A EP90906912A EP0473619A1 EP 0473619 A1 EP0473619 A1 EP 0473619A1 EP 90906912 A EP90906912 A EP 90906912A EP 90906912 A EP90906912 A EP 90906912A EP 0473619 A1 EP0473619 A1 EP 0473619A1
Authority
EP
European Patent Office
Prior art keywords
lever
switching mechanism
contact
release
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.)
Granted
Application number
EP90906912A
Other languages
German (de)
English (en)
Other versions
EP0473619B1 (fr
Inventor
Dieter Kropp
Gerhard Scholz
Guenter Boeker
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.)
OFFERTA DI LICENZA AL PUBBLICO
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to AT90906912T priority Critical patent/ATE93343T1/de
Publication of EP0473619A1 publication Critical patent/EP0473619A1/fr
Application granted granted Critical
Publication of EP0473619B1 publication Critical patent/EP0473619B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7418—Adjusting both electrothermal and electromagnetic mechanism
    • 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
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
    • H01H71/526—Manual reset mechanisms which may be also used for manual release actuated by lever the lever forming a toggle linkage with a second lever, the free end of which is directly and releasably engageable with a contact structure
    • 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
    • H01H2071/7454—Adjusting only the electrothermal mechanism with adjustable axis of transmission lever between bimetal element and trip lever

Definitions

  • the invention relates to a switching mechanism for a circuit breaker, in which the middle of a spring-loaded manual operating lever Ls and a pivotally hinged latch lever via a latching lever L le, which is in contact with one another under the action of a contact spring located contact lever carrying the latching point can be brought into a fixed Lung with a fixed contact piece, the contact lever being supported on the latching point and on the fixed contact piece and being held by the contact spring, and having a pivotably mounted release lever L acting on the latching point , which can be rotated by magnetic and / or thermal triggers.
  • Such a switching mechanism is known from DE 29 38 858 C2.
  • the release lever which can be pivoted by a magnetic release device and by a bimetal, acts with a lever arm on the angled extension of the ratchet lever, while on its other lever arm the release members act directly or via an intermediate slide.
  • another lever arm of the release lever l protrudes into the swivel range of the contact lever L carrying the link.
  • both the magnetic and thermal release element act in the same direction on the release lever that releases the latching point.
  • the bimetallic release is subject to a different movement sequence than the magnetic release in the event of an overload, the two different movements can hardly be optimally matched to the required path of the switch.
  • a self-switch is known (DE 35 15 297 A1), in which a magnetic and thermal tripping element by means of individually adjustable transmission elements are operatively connected to a latching point of the switch mechanism.
  • the transmission link for the thermal release element is an intermediate lever acted upon by a bi-meta L Ist tire, which in turn acts on a lever releasing the latching point.
  • This lever can also be pivoted from the magnetic release element via a clutch lever and a bracket in the unlocking direction.
  • the separate arrangement of the transmission elements simplifies the setting of the bimetallic release, but ultimately the movements of both release elements are transmitted to a common release lever. This also results in a mutual coupling of the release elements in this arrangement.
  • the invention has for its object to avoid the Häei le of the known switches and to simplify the switching mechanism mentioned at the outset in such a way that those controlled by the triggering elements
  • Unlatching movements are completely decoupled from one another and the thermal release can be optimally adapted to the latching point independently of the magnetic release.
  • the action of the magnetic release path and the thermal release path are completely separated from each other in their effect on the unlatching point. Since there are also only a few parts, a high level of shock and vibration resistance is achieved. When hiring the thermal release system also does not cause deformation of components, so that the whole system is relatively insensitive. Due to the small masses to be moved, the entire switching mechanism also shows extremely fast switch-off behavior.
  • the switching mechanism of a circuit protection circuit shown schematically in the switched-off position in the single drawing figure, has a pivotable manual control knob (1) to which a bow-shaped latch lever (2) is pivoted. With its angled free end (2a), this forms a latching surface which interacts with a latching nose (3a) of a preferably rigid contact lever (3).
  • the contact lever is pivotably mounted on an axis (3c) by means of an elongated hole (3b) and is itself loaded by a contact spring (4) which engages between the elongated hole (3b) and the latching lug (3a).
  • the contact lever works with its contact end (3d) on a fixed contact piece (5).
  • the latch lever (2) loaded by a spring (2b) clockwise comes with its latching surface in front of the latching nose (3a) to lie and then turns the contact lever around the axis (3c) clockwise against the force of the contact spring (4).
  • the contact lever with its contact end (3d ') touches the fixed contact piece (5) in order to then lift off within the slot (3b) from the axis (3c) so that the contact spring (4) now generates the contact pressure and clamped the switching mechanism.
  • the elongated hole (3b ) in the contact lever thus serves as a fulcrum, enables the dead center bracing of the knee joint formed from the manual control knob (1) and the ratchet lever (2) and provides a sufficient burn-up reserve.
  • thermal release (8) and a magnetic release (9) are arranged in the merely indicated housing (6) of the circuit breaker in series connection with the contact point (3d, 5).
  • the thermal release for limiting the overcurrent is designed as a simple smooth bi meta 11strei fen (8a) and with its base (8b) preferably on a rear extension of an arc guide rail (10) which belongs to the quenching chamber (7) of the switch located below the contact point , rigidly attached.
  • a line (11a) also leads from the base point (8b) to a connecting terminal (11).
  • the bimetallic strip which cannot be adjusted, is arranged approximately in the same direction as the contact lever, and is connected at its free end (8c), which is variable with the influence of heat, via a flexible line (8d) to the contact lever (3) and engages behind with its free-standing end (8c) a release lever (12).
  • This is designed as an angle lever and in turn is pivotally mounted on a bearing body (13) to be described in more detail.
  • the unlatching lever (12) is preferably a stamped part, which is made electrically non-conductive by surface treatment, or a molded part made of a non-conductive material. With its lever arm (12a) the unlatching lever (12) engages under the angled end (2a) of the ratchet lever (2), the upper side of the lever arm having a curve shape adapted to the pivoting path of the contact lever (3). If a current flows through the thermal release, the bimetal strip (8a ) , which heats up due to the internal resistance, bends with its free end (8c) in the direction of the release lever (12) and engages behind it Lever arm (12b).
  • the unlatching lever is pivoted clockwise so far that the end (2a) of the pawl lever is raised by the lever arm (12a) and the latching point is released. Under the action of the contact spring (4), the contact lever (3) then pivots in the disengaging direction.
  • magnetic trigger (9) is essentially formed by a release coil (9a) surrounded by a back iron with a plunger (9b) guided therein.
  • the latter works with its end designed as a plunger on a release lever (14) which is pivotable about a housing-fixed axis (14c) on the side of the contact lever L s opposite the release lever (12).
  • the lever-shaped trigger lever (14a) also engages under the angled end (2a) of the latch lever (2) in a plane parallel to the lever arm (12a).
  • the top of the lever arm (14a) is provided with a curved cam track and thus optimally adapted to the movement of the ratchet lever (2) when the mechanism is switched on, while the other lever arm (14b) of the release lever is designed to be hammer-shaped.
  • the plunger armature (9b) which snaps in the direction of the lever arm (14b) in the event of a short-circuit current, pivots the release lever counterclockwise in such a way that it releases the latching point (2a, 3a) and then accelerates the contact lever from the hammer head into the open position shown, the contact spring (4) is also effective as an opening spring.
  • the movement of the magnetic release (9) is thus transmitted to the latching point via the release lever (14) completely independently of the movement of the thermal release (8).
  • Characterized occur to those supported on the Verklinkungsnase (3a) of ratchet levers (2) about ⁇ same DESCAL li nkungsbedi ngungen and tilting of the angled end (2a) is practically excluded.
  • the curved tops of the lever arms (12a or 14a) can also be optimally adapted to the movement of the ratchet lever (2) during the switch-on process, so that even in the event of a fault, i.e. there is an overload or a short circuit, unlatching can be achieved at an early stage , before the contact lever reaches its usual over-dead center position.
  • the thermal release (8) is only necessary with regard to the thermal release (8), since the magnetic release (9) and the release lever (14) can be matched sufficiently precisely to the release conditions within the scope of the manufacturing tolerances.
  • the bimetallic strip (8a) is firmly arranged at its base (8b) and has itself made no adjustment possible. Rather, the thermal release is adjusted in a special way by changing the relative position of the decalcifying lever (12), which is mounted with its bearing bore (12c) on a pin (13a) arranged eccentrically on the already mentioned bearing body (13).
  • the cylindrical bearing body is in turn adjustable from outside the housing in the finished switch in a manner not shown.
  • the unlatching lever (12) By turning the bearing body, which is kept stiff in the housing, the unlatching lever (12) can be moved due to the eccentricity of its bearing point in such a way that the given one Over loadst rom and the curvature of the bimetallic strip (8a) caused by this, the latching via the unlatching lever (12) is released precisely and the switching mechanism automatically interrupts the current flow at the contact point.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Thermally Actuated Switches (AREA)

Abstract

Les disjoncteurs de protection présentent un point d'interruption de contact qui est encliqueté le plus souvent par l'intermédiaire d'un mécanisme à genouillère. Si un courant d'intensité anormalement élevé circule, le point d'encliquetage est désaccouplé au moyen d'un interrupteur thermique ou magnétique, de sorte que le courant est interrompu. Pour le mécanisme de commutation, les mouvements de déclenchement des deux interrupteurs doivent être transmis au point d'encliquetage, par l'intermédiaire de moyens aussi simples que possible, entièrement désaccouplés les uns des autres. A cet effet, un levier de déclenchement (14) sollicité par un interrupteur magnétique (9) et un levier de décliquetage (12) sollicité par un interrupteur thermique (8) sont montés de manière à pouvoir pivoter indépendamment l'un de l'autre et séparément, chacun sur un côté d'un levier de contact (3). Les deux leviers précités (12, 14) sont en prise par leurs bras parallèles superposés (14a, 12a), au dessous d'un point d'encliquetage qui est formé par l'extrémité repliée (2a) d'un levier à cliquet (2) et par un nez (3a) formant une saillie façonnée directement sur le levier de contact (3). Par déplacement d'une manette à commande manuelle (1) en une position correspondant au point mort supérieur du levier à cliquet (2), le mécanisme de commutation se trouve tendu, le levier de contact (3) prenant alors appui sur le contact fixe (5) et sur le point d'encliquetage (2a, 3a). En cas de surintensité, l'interrupteur thermique (8/8a) non réglable et fixé rigidement s'incurve et déplace le levier de décliquetage (12) dans le sens des aiguilles d'une montre, cependant qu'en cas de court-circuit, le mouvement de déclenchement de l'interrupteur magnétique (9) est transmis dans le sens inverse des aiguilles d'une montre au levier de déclenchement (14), de sorte que le point d'encliquetage peut être dégagé indépendamment. Le mécanisme de commutation convient notamment pour des disjoncteurs de protection de construction étroite.
EP90906912A 1989-05-27 1990-05-18 Mecanisme de commutation pour disjoncteur de protection Expired - Lifetime EP0473619B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90906912T ATE93343T1 (de) 1989-05-27 1990-05-18 Schaltmechanismus fuer einen leitungsschutzschalter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917326A DE3917326A1 (de) 1989-05-27 1989-05-27 Schaltmechanismus fuer einen leitungsschutzschalter
DE3917326 1989-05-27

Publications (2)

Publication Number Publication Date
EP0473619A1 true EP0473619A1 (fr) 1992-03-11
EP0473619B1 EP0473619B1 (fr) 1993-08-18

Family

ID=6381536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90906912A Expired - Lifetime EP0473619B1 (fr) 1989-05-27 1990-05-18 Mecanisme de commutation pour disjoncteur de protection

Country Status (4)

Country Link
EP (1) EP0473619B1 (fr)
DE (2) DE3917326A1 (fr)
ES (1) ES2044582T3 (fr)
WO (1) WO1990015431A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313207A1 (de) * 1993-04-22 1994-10-27 Kopp Heinrich Ag Leitungsschutzschalter
ES2147158B1 (es) * 1998-12-30 2001-03-01 Power Controls Iberica Sl Perfeccionamientos en los disyuntores automaticos de escape a tierra.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1067514B (de) * 1955-10-15 1959-10-22 Calor Emag Elektrizitaets Ag Ausloeseeinrichtung fuer mehrpolige Leistungs-Selbstschalter
FR2344949A1 (fr) * 1976-03-15 1977-10-14 Merlin Gerin Disjoncteur miniature basse tension
DE2938858C2 (de) * 1979-09-26 1983-10-13 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltmechanismus für einen Leitungsschutzschalter
DE2943696C2 (de) * 1979-10-30 1982-06-24 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Schaltmechanismus für Leitungsschutzschalter
DE8500461U1 (de) * 1985-01-10 1986-02-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verklinkungsanordnung eines Leitungsschutzschalters
DE3515297A1 (de) * 1985-04-27 1986-11-06 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Selbstschalter mit magnetischem und thermischem ausloeseorgan

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9015431A1 *

Also Published As

Publication number Publication date
DE3917326A1 (de) 1990-11-29
WO1990015431A1 (fr) 1990-12-13
EP0473619B1 (fr) 1993-08-18
DE59002402D1 (de) 1993-09-23
ES2044582T3 (es) 1994-01-01

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