EP0371419A2 - Disjoncteur électrique - Google Patents

Disjoncteur électrique Download PDF

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Publication number
EP0371419A2
EP0371419A2 EP89121808A EP89121808A EP0371419A2 EP 0371419 A2 EP0371419 A2 EP 0371419A2 EP 89121808 A EP89121808 A EP 89121808A EP 89121808 A EP89121808 A EP 89121808A EP 0371419 A2 EP0371419 A2 EP 0371419A2
Authority
EP
European Patent Office
Prior art keywords
main
contact point
switching mechanism
selective
lever
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.)
Withdrawn
Application number
EP89121808A
Other languages
German (de)
English (en)
Other versions
EP0371419A3 (fr
Inventor
Hermann Schmitt
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 AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
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 Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0371419A2 publication Critical patent/EP0371419A2/fr
Publication of EP0371419A3 publication Critical patent/EP0371419A3/fr
Withdrawn legal-status Critical Current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
    • H01H71/1081—Modifications for selective or back-up protection; Correlation between feeder and branch circuit breaker
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H75/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
    • H01H75/02—Details
    • H01H75/04—Reset mechanisms for automatically reclosing a limited number of times
    • H01H75/06—Reset mechanisms for automatically reclosing a limited number of times effecting one reclosing action only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/40—Combined electrothermal and electromagnetic mechanisms

Definitions

  • the invention relates to an electrical circuit breaker, in particular a circuit breaker for the selective interruption of individually protected consumer circuits, with a main contact point and a secondary contact point connected in parallel with it, with a main switching mechanism with a latching point for actuating the main and the secondary contact point.
  • main circuit breakers It is important that if a malfunction occurs in a consumer that leads to a short circuit in the associated circuit, the other connected consumer networks are not disconnected from the supply network by responding to the main circuit breaker, as is necessarily the case when fuses are used.
  • the main circuit breaker should respond selectively, i.e. that is, the power supply should initially be guaranteed, at least until the fuse assigned to the consumer concerned has disconnected the short-circuiting circuit from the network, without the other consumer networks being affected.
  • the voltage value does not drop below 70% of its nominal value, since otherwise the self-holding contactors used in the consumer circuits not affected can drop out.
  • the selective interruption of the power supply is temporary z. B. on 1/4 or 1/2 period of the applied mains frequency. Compliance with these criteria is only guaranteed with considerable effort in the known automatic circuit breakers.
  • a selective switching mechanism which cooperates with a delay device which responds when an overcurrent occurs and acts on the selective switching mechanism, that the selective switching mechanism is operatively connected to the main switching mechanism, that an impact anchor is provided, which at Occurrence of an overcurrent hits the main contact point and that a holding device is provided for temporarily keeping the main contact point open, which cooperates with the selective switching mechanism.
  • the selective switching mechanism according to the invention in this case has a switching bridge which is pivotably mounted about a pivot point which is fixedly arranged in the switch housing and is used to transmit the action emanating from the delay device to the holding device and to the main switching mechanism.
  • the selective switching mechanism also has a latching device which cooperates with the switching bridge and serves as a selection element with regard to the actuation of the main switching mechanism, that is to say it only acts on it with a delay, during which time the downstream line fuse associated with the consumer circuit concerned may be involved disconnection from the network.
  • the electrical selector switch provided with the selective switching mechanism according to the invention makes use of the delay device proposed in German patent application P 38 23 976.0. Instead of this, another delay device can also be used if it is suitable for actuating the switching bridge.
  • FIG. 1 shows the schematic structure of a selective switching mechanism 10 belonging to an electrical self-switch, which cooperates both with a main switching mechanism 11, which is indicated, and with a delay device 12 and a holding device 16, which acts on a main contact point 14.
  • the selective switching mechanism 10 consists essentially of a switching bridge 20, which is pivotably mounted in a support bearing 21 over approximately half its length. In this way, two lever arms 22, 23 of the switching bridge 20 are formed, which on the one hand cooperate with the delay device 12 and via an actuating lever 24 with the holding device 16 and on the opposite side via a tab 26 and a locking lever 28 with the main switching mechanism 11.
  • the actuating lever 24, which connects to the switching bridge 20 in an articulated manner in a pivot bearing 25, is axially displaceably guided in the housing of the electrical switching device (not shown in detail), so that its direction of action for the holding device 16 is always maintained consistently.
  • the delay device 12 provided for loading the switching bridge 20 has a coil body 30 with a central cavity 31, in which a longitudinally displaceable magnet armature 32 and a magnet core 33 are arranged, through which a plunger 34 connected to the magnet armature 32 is guided, which moves the magnet armature 32 transmits to the switching bridge 20.
  • a return spring 35 which is supported on the housing or on an abutment connected to the deceleration device 12, is arranged opposite the force introduction point of the tappet 34 on the switching bridge 20. This ensures that the switching bridge 20 is always in operative connection with the delay device 12.
  • the return spring 35 acts on the magnet armature 32 via the switching bridge 20 and the plunger 34 until the magnet armature 32 comes to rest against a stop 36.
  • the support bridge 21 divides the switching bridge 20 into approximately two lever arms 22, 23 of equal length.
  • the lever arm 23 facing away from the delay device 12 also has a swivel joint 27 which is arranged at approximately the same distance from the support bearing 21 as the swivel joint 25 located on the lever arm 22 facing the delay device 12.
  • the switching bridge 20 is connected in an articulated manner to the bracket 26 via the swivel joint 27.
  • the tab 26 is a C-shaped transmission lever, which consists of a rectilinear part, at the ends of which legs 37, 38 are bent at right angles.
  • the leg 37 here adjoins the swivel joint 27, while the opposite leg 38 is penetrated by a guide pin 39 which engages in a sliding guide 40 which is embedded in a holding plate 42 which is only indicated and which encompasses the selective switching mechanism 10 on both sides, as shown in FIG 5 can be seen.
  • a pivot pin 29 connected to the locking lever 28 also engages in the sliding guide 40, which on the one hand enables the locking lever 28 to pivot and on the other hand displaces it within the longitudinal guide 40.
  • the locking lever 28 is T-shaped and has at the end facing away from the pivot pin 29 a molded nose 44 with a transverse to its longitudinal axis bearing surface 45.
  • the end of the locking lever 28 provided with the pivot pin 29 is connected to a crossbar 46 arranged transversely thereto , one end of which is acted upon by a compression spring 47 and whose opposite other end cooperates with the swivel bridge 20.
  • a bracket 48 is formed on the free end of the lever arm 23 of the swivel bridge 20, which, depending on the swivel position of the locking lever 28 or the switching bridge 20, comes into abutment with the crossmember 46 of the locking lever 28 or not.
  • the crossmember 46 In order to avoid malfunctions of the locking lever 28, it may be expedient to provide the crossmember 46 with a molding 49, which serves as a guide for the attacking compression spring 47.
  • FIG. 1 shows the switching state which it assumes after being acted upon by the delay device 12 as a result of a short-circuit current which has occurred in a downstream consumer network.
  • the delay device 12 is electrically connected so that the short-circuit current flows through it, as does an impact armature 60 which acts on the main contact point 14 and which strikes the main contact point 14 with its striking pin 61, so that its movable contact piece 15 latches in the associated holding device 16 .
  • the magnet armature 32 is axially displaced from its rest position by the stop 36, so that it pushes the lever arm 22 of the switching bridge 20 of the selective switching mechanism 10 against the force of the return spring 35 with its plunger 34 applied that the switching bridge 20 pivots about the pivot point 21, whereby the opposite lever arm 23 moves upward and thereby the tab 26, which is articulated in the pivot 27 on the switching bridge 20, with the guide pin 39 arranged in the upper switching arm 38 in the longitudinal guide 40 slides up to the stop.
  • the crossbeam 46 of the locking lever 28 is first released from the way by lifting the holding bracket 48, as can be seen in comparison to the switching position shown in FIG. 4, which shows the rest position in the switched-on state.
  • the locking lever 28 which is also slidably guided in the longitudinal guide 40, forms together with the compression spring 47 an inert spring-mass system, the persistence of which is used as follows.
  • the locking lever 28 pivots, following the spring force of the compression spring 47, with a slight delay due to its behavior counterclockwise. Since, at the same time as the crossbar 46 is released, the tab 26 in the longitudinal guide 40 also moves upwards and assumes this position earlier due to the inertia than the locking lever 28 can pivot, the guide pin 39 in the holding arm 38 of the tab 26 forms a stop for the nose, as it were 44 of the locking lever 28, so that it can only perform a small swivel path - does not reach the vertical position required for the actuation of the main switching mechanism.
  • the magnet armature 32 of the delay device 12 slides back from the position shown in FIG. 1 towards the stop 36 within a defined period of time.
  • FIG. 2 An intermediate position reached when sliding back is shown in FIG. 2.
  • the magnet armature 32 has covered approximately half of its displacement.
  • the switching bridge 20 is also always pivoted back a little in the stop with the tappet 34 due to the action of the return spring 35. This ensures that the tab 26 with the guide pin 39 in the longitudinal guide 40 moves downward so far that the nose 44 of the locking lever 28 engages over the guide pin 39, the locking lever 28 engaging with its longitudinal side on the guide pin 39 and the stop surface 45 the nose 44 of the locking lever comes into the displacement of the guide pin 39.
  • both of the magnet armature 32 of the delay device 12 and accordingly of the switching bridge 20 of the selective switching mechanism 10 the actuating lever 24 just comes into contact with the holding device 16 for the main contact point 14, but without the latching of the movable contact piece 15 of the main contact point 14 to solve in the holding device 16.
  • circuitry provides a renewed application by the delay device 12, the kinematic sequence of which is shown in FIG. 3.
  • the striking armature 32 again acts on the switching bridge 20 in such a way that the holding bracket 48 arranged on the opposite lever arm 23 releases the crossmember 46 and the latching lever 28, the nose 44 of which has caught on the guide pin 39 of the tab 26, as a result of the previously described Longitudinal displacement of the tab 26 along the longitudinal guide 40 on the main switching mechanism 11 is movable to unlatch it.
  • the latching lever 28 actuates the latching lever 50 of the main switching mechanism 11 with the end face opposite the stop surface 45, so that the latch lever 52, which is acted upon in the direction of arrow P, follows this force can pivot in and thereby ensures the permanent opening of both the main contact point 14 and a secondary contact point, not shown.
  • the switching bridge 20 is at right angles to the direction of displacement of the actuating lever 24, whereby at the same time, with the aid of the holding arm 48, the latching lever 28 is pivoted clockwise with the aid of the compression spring 47 while the compression spring 47 is tensioned, so that it disengages from the main switching mechanism 11 .
  • FIG. 5 shows the area of the selective switching mechanism 10, which comprises the tab 26 and the latching lever 28, shown in a side view and a longitudinal section of the section line VV indicated therein.
  • the switching bridge 20 is designed as a U-shaped profiled longitudinal rod, the side walls of which are penetrated by bolts forming the swivel joints 25, 27 and the pivot axis 21.
  • the tab 26 is made of two flat parts of the same design, which are connected to one another in the region of the axis of rotation 27 by means of a connecting web 43.
  • the holding frame 42 in which the longitudinal guide 40 is incorporated, serves as the outer boundary of the selective switching mechanism 10 and prevents the inadmissible play of the individual parts that are operatively connected to one another while observing the required tolerances.
EP19890121808 1988-12-01 1989-11-25 Disjoncteur électrique Withdrawn EP0371419A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3840482 1988-12-01
DE19883840482 DE3840482A1 (de) 1988-12-01 1988-12-01 Elektrischer selbstschalter

Publications (2)

Publication Number Publication Date
EP0371419A2 true EP0371419A2 (fr) 1990-06-06
EP0371419A3 EP0371419A3 (fr) 1991-09-25

Family

ID=6368232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890121808 Withdrawn EP0371419A3 (fr) 1988-12-01 1989-11-25 Disjoncteur électrique

Country Status (2)

Country Link
EP (1) EP0371419A3 (fr)
DE (1) DE3840482A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550927A1 (fr) * 1991-12-10 1993-07-14 Holec Systemen En Componenten B.V. Interrupteur de sécurité automatique sélectif
DE4424125C1 (de) * 1994-07-08 1995-07-13 Flohr Peter Hauptsicherungsautomat
EP0984476A2 (fr) * 1998-08-14 2000-03-08 Moeller GmbH Dispositif de déclenchement pour un disjoncteur
WO2003021617A1 (fr) * 2001-08-22 2003-03-13 Aeg Niederspannungstechnik Gmbh & Co., Kg Unité de déclenchement pour disjoncteur (1)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011089062B4 (de) * 2011-12-19 2013-08-14 Siemens Aktiengesellschaft Übertragungsbaugruppe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB664907A (en) * 1948-12-30 1952-01-16 British Thomson Houston Co Ltd Improvements in and relating to transitory electroresponsive control apparatus
DE1004270B (de) * 1954-03-12 1957-03-14 Felten & Guilleaume Carlswerk Einrichtung zur Kurztrennung von Leistungsschaltern mit zeitlich verzoegerter endgueltiger Abschaltung bei Verwendung von mechanischen Ausloeseorganen, wie Primaerrelais u. dgl.
FR2365229A1 (fr) * 1976-09-21 1978-04-14 Merlin Gerin Procede et dispositif de protection selective a reenclenchement logique pour reseau de distribution
DE2904117A1 (de) * 1979-02-03 1980-08-14 Bbc Brown Boveri & Cie Ausloesevorrichtung
EP0043020A1 (fr) * 1980-06-24 1982-01-06 BROWN, BOVERI & CIE Aktiengesellschaft Appareillage d'installation électrique, notamment disjoncteur automatique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2854711C2 (de) * 1978-12-18 1984-04-26 Brown, Boveri & Cie Ag, 6800 Mannheim Selektivschutzeinrichtung
DE2854616C2 (de) * 1978-12-18 1984-03-22 Brown, Boveri & Cie Ag, 6800 Mannheim Selektivschutzeinrichtung
DE3823976A1 (de) * 1988-07-15 1990-01-18 Asea Brown Boveri Verzoegerungseinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB664907A (en) * 1948-12-30 1952-01-16 British Thomson Houston Co Ltd Improvements in and relating to transitory electroresponsive control apparatus
DE1004270B (de) * 1954-03-12 1957-03-14 Felten & Guilleaume Carlswerk Einrichtung zur Kurztrennung von Leistungsschaltern mit zeitlich verzoegerter endgueltiger Abschaltung bei Verwendung von mechanischen Ausloeseorganen, wie Primaerrelais u. dgl.
FR2365229A1 (fr) * 1976-09-21 1978-04-14 Merlin Gerin Procede et dispositif de protection selective a reenclenchement logique pour reseau de distribution
DE2904117A1 (de) * 1979-02-03 1980-08-14 Bbc Brown Boveri & Cie Ausloesevorrichtung
EP0043020A1 (fr) * 1980-06-24 1982-01-06 BROWN, BOVERI & CIE Aktiengesellschaft Appareillage d'installation électrique, notamment disjoncteur automatique

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550927A1 (fr) * 1991-12-10 1993-07-14 Holec Systemen En Componenten B.V. Interrupteur de sécurité automatique sélectif
DE4424125C1 (de) * 1994-07-08 1995-07-13 Flohr Peter Hauptsicherungsautomat
EP0691665A1 (fr) * 1994-07-08 1996-01-10 ABBPATENT GmbH Coupe-circuit automatique principal
EP0984476A2 (fr) * 1998-08-14 2000-03-08 Moeller GmbH Dispositif de déclenchement pour un disjoncteur
EP0984476A3 (fr) * 1998-08-14 2001-02-28 Moeller GmbH Dispositif de déclenchement pour un disjoncteur
WO2003021617A1 (fr) * 2001-08-22 2003-03-13 Aeg Niederspannungstechnik Gmbh & Co., Kg Unité de déclenchement pour disjoncteur (1)

Also Published As

Publication number Publication date
DE3840482A1 (de) 1990-06-07
EP0371419A3 (fr) 1991-09-25

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