EP1363300B1 - Disjoncteur pour courants élevés et basse tension - Google Patents

Disjoncteur pour courants élevés et basse tension Download PDF

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Publication number
EP1363300B1
EP1363300B1 EP20030010745 EP03010745A EP1363300B1 EP 1363300 B1 EP1363300 B1 EP 1363300B1 EP 20030010745 EP20030010745 EP 20030010745 EP 03010745 A EP03010745 A EP 03010745A EP 1363300 B1 EP1363300 B1 EP 1363300B1
Authority
EP
European Patent Office
Prior art keywords
contact
circuit breaker
actuating mechanism
breaker according
articulated
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 - Fee Related
Application number
EP20030010745
Other languages
German (de)
English (en)
Other versions
EP1363300A3 (fr
EP1363300A2 (fr
Inventor
Gregor Fleitmann
Uwe Linzenich
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.)
Eaton Industries GmbH
Original Assignee
Moeller GmbH
Kloeckner Moeller 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 Moeller GmbH, Kloeckner Moeller GmbH filed Critical Moeller GmbH
Publication of EP1363300A2 publication Critical patent/EP1363300A2/fr
Publication of EP1363300A3 publication Critical patent/EP1363300A3/fr
Application granted granted Critical
Publication of EP1363300B1 publication Critical patent/EP1363300B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal
    • 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
    • H01H71/1009—Interconnected mechanisms
    • 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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H2071/0292—Housing or frames containing grooves or slots for guiding movable parts

Definitions

  • the invention relates to a circuit breaker for high currents and low voltage according to the preamble of claim 1.
  • a housing made of insulating molding material consists of a lower part and of a shell to be screwed onto this and is divided by parallel inner partition walls into a plurality of adjacent pole spaces.
  • An actuating mechanism, a number of contact units corresponding to the number of poles of the circuit breaker and operable by the actuating mechanism, associated and outgoing connection means and trigger means for automatically opening the contact units when adjustable boundary conditions are exceeded by the currents flowing through the contact units are stored in the lower part and fixed there partly.
  • Each pole space has a stationary contact connected to the bottom part and a plurality of movable contact fingers arranged in parallel.
  • the movable contact fingers are limited against the action of contact springs stored in a U-shaped metallic contact holder.
  • the contact holder of all poles are screwed with a transverse to the pole spaces extending connecting web.
  • the connecting bridge consists of a plastic-coated rod-like steel core and is rotatably mounted between the lower part and upper part. For this purpose, corresponding bearing points are formed in the intermediate walls.
  • On the connecting web shielding segments are formed, which engage in insulating deep grooves, which connect to provided for the connecting web recesses in the intermediate walls.
  • the contact holder of the middle pole is pivotally connected to lower toggle levers of a toggle lever system belonging to the actuating mechanism.
  • the actuating mechanism also has an actuating lever, a force accumulator, a locking and unlockable support lever and a latching mechanism operatively connected to the triggering means.
  • the actuating mechanism is mounted between two side panels, which in turn are mounted in the lower part.
  • the contact fingers take against the fixed contacts an open or closed-Ge Position.
  • the contact fingers are connected in the opposite direction from the fixed contacts and beyond their bearing axis in the contact holders, each with a flexible connecting conductor which extends below the connecting web and is connected at the other end with a fixed busbar.
  • a disadvantage of this solution is that in the interaction of the metallic contact holder with the metallic actuating mechanism and the connecting web there is a considerable risk of electrical voltage carryover between the pole spaces or the contact units. Furthermore, due to the nature of the coupling of the contact units with the actuating mechanism and due to their axis of rotation defined by the connecting bridge only a moderate compromise between the opening angle of the contact units, the power transmission from the actuating mechanism to the contact holder and the opening and closing speed of the contact units can be obtained. Due to their arrangement and length during switching operations, the flexible connection conductors are considerably compressed or stretched, so that the connection conductors are both exposed to wear that is not negligible and also exert considerable forces on the contact fingers and thus adversely affect their dynamics during switching operations.
  • One after US Pat. No. 4,866,225 known three-pole circuit breaker has a transverse connecting web, which contains a partially formed with insulating rod-like metal stiffener which is offset from contact pressure means. Made of insulating contact holder are integrally connected to the insulating parts of the connecting web. In each case between two polar spaces arranged connecting links are on the one hand rigidly connected to the metal reinforcement and on the other hand hingedly connected to an actuating mechanism. The metal connections to the metal reinforcement there is a risk of voltage carryover to the actuating mechanism.
  • the invention is therefore based on the object to provide an improved contact holder-connecting web arrangement.
  • an electrical voltage-free actuating mechanism can advantageously be combined with the contact system to form a compact design, wherein electrical voltage carryover via the metallic actuating mechanism is avoided.
  • This makes it possible to realize the largest possible creepage and clearance distances between the individual pole spaces and between them and the operating elements connected to the actuating mechanism, which advantageously has an effect, in particular at the upper limit of the low voltage, ie at 1000 V.
  • the geometric position of the pivot axis of the contact holder can be fixed independently of the current paths. Due to their optimal guidance in extension to said pivot axis experience the flexible connection conductor - i. Gen.
  • the favorable position of said pivot axis and the compact design of the connecting web allow a quasi-direct power transmission from the support lever of the actuating mechanism, ie over the short path from the one end mounted in the support lever and connected to the other end with the retaining plate and almost stretched toggle lever system on the moving parts of the contact system. This allows relatively short opening times of the contact system when the circuit breaker is triggered.
  • the side panels may be formed in the usual way as sheets. As side panels but can also serve the intermediate walls.
  • a development of the invention consists in the advantageous embodiment of the retaining plate.
  • the retaining plate has a sufficient rigidity by a U-shaped design.
  • the direct connection of the retaining plate with the connecting web has a positive effect on the torsional rigidity of the moving parts of the contact units.
  • For a favorable torque transfer from the toggle lever system of the actuating mechanism to the contact units are lower toggle approximately in the middle between the attachment to the connecting web and the storage in the side panels hinged.
  • the bearings are space-saving realized by rivet joints.
  • the forces to be absorbed by lateral simple support tabs increase the flexural rigidity of the moving parts of the contact units. This advantage has an effect especially on circuit breakers with more than three poles.
  • the moving parts of the contact system are additionally intercepted in this way at the two lateral ends in order to provide the design with the greatest possible stability.
  • the support tabs also need for pivoting no continuous, mounted in the lower part pivot axis.
  • the pivotable mounting of the support tabs is preferably carried out on space-saving rivet joints, which are connected to the base defined support angles.
  • the high-voltage three-pole low-voltage circuit breaker is surrounded by a molded case, of which in Fig. 1 only the lower part 2 is shown.
  • the lateral outer walls 4 and the two intermediate walls 5 serve for lateral delimitation of three parallel polar spaces 6 to 8.
  • the polar spaces 6 to 8 are associated with contact units 9, 10 and 11.
  • Each contact unit 9, 10, 11 consists of a defined in the lower part 2 fixed contact 16, a plurality of parallel movable contact fingers 18 and an arc extinguishing unit 20.
  • the belonging to a contact unit 9, 10 and 11 contact fingers 18 are by means of a pivot axis 22 in a U -shaped contact holder 24 limited pivotally mounted and are based in a known manner against contact pressure springs 26 off.
  • the fixed contacts 16 are connected via first bus bars 12 to first terminals 14.
  • the contact fingers 18 are connected via flexible connecting conductors 17 with second busbars 13, to which connect second terminals, not shown.
  • the actuating mechanism 30 includes an actuating lever 32, via which the circuit breaker is externally operable.
  • the actuating mechanism 30 further comprises a toggle lever system 34 and is triggered via release means, not shown.
  • the structure and operation of such a conventional actuating mechanism 30 is from the aforementioned EP 0 206 882 B1 to see.
  • the toggle mechanism 34 is connected to a spring force accumulator and has an upper toggle lever and two via a toggle lever axis connected thereto lower toggle lever 36.
  • the contact holder 24 of all contact units 9 to 11 are interconnected.
  • the contact holder 24 and the connecting web 38 have been made in one piece of insulating molding material, wherein a likewise transverse rod-like steel core 40 has been overmolded.
  • the above the contact pressure springs 26 extending steel core 40 gives the existing of the three contact holders 24 and the connecting web 38 movable system sufficient rigidity against both bending and torsion.
  • a U-shaped retaining plate 42 engages with its center leg 44 and its two outer legs 46, the contact holder 24 of the central contact unit 10 and is screwed immovably at its pointing to the arc extinguishing 20 end via two bends 48 with the connecting web 38.
  • the outer legs 46 are pivotally mounted in the side panels 28 via a respective bearing point 50 designed as a riveting joint.
  • the holding plate 42 is in its middle region with its outer legs 46 also via rivet-shaped joints 52 connected to the lower knee levers 36.
  • connection conductors 17 extend approximately in a plane which encloses the connection points of the connection conductors 17 with the contact fingers 18 and the pivot axis 51, so that the connection points of the connection conductors 17 with the second conductor rails 13 are also approximately in this plane.
  • the connecting conductors 17 have a relatively small length, are exposed to switching operations only small compression and expansion movements and thus low internal friction and exert relatively low forces and torques on the contact fingers 18.
  • 5 elongated recesses 54 are provided for the connecting web 38 in the intermediate walls.
  • the consisting of the contact holders 24 and the connecting web 38 molded part further includes four Abnesegmente 56 and 57, which extend in pairs and in close proximity to both sides of the intermediate walls 5.
  • support tabs 60 of sheet metal are fixed immovably to the outer sides of the contact holders 24 belonging to the two outer contact units 9 and 11 small distance to the outer walls 4 extending in the lower part 2 are pivotally mounted.
  • an articulated rivet connection 62 connects one of the support tabs 60, each with a support bracket 64.
  • the support bracket 64 are fixed in the lower part 2 characterized in that they are screwed when screwing the second busbars 13 in the lower part 3 between a set back in the associated busbar 13 gradation 66 and the Floor 3 have been determined positive and positive.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Claims (7)

  1. Disjoncteur pour courants élevés et basse tension, comprenant:
    un boîtier moulé composé d'une partie inférieure (2) et d'une partie supérieure, avec des espaces de pôles (6...8) formés par des parois intermédiaires parallèles (5);
    un mécanisme d'actionnement (30), comportant un système à levier coudé (34) et agencé dans des panneaux latéraux fixes (28);
    des moyens de déclenchement coopérant avec le mécanisme d'actionnement (30);
    un nombre d'unités de contact (9...11) correspondant au nombre des espaces de pôles (6...8), contenant respectivement un contact fixe (16) relié à la partie inférieure (2) et plusieurs doigts de contact parallèle mobiles (18), agencés de sorte à pouvoir effectuer un pivotement limité dans un porte-contact en U (24), contre l'action de ressorts de compression de contact (26), et reliés par l'intermédiaire de conducteurs de raccordement flexibles (17) à des rails de courant fixes (13), et une unité d'extinction de l'arc (20), l'unité de contact (10) associée à un espace de pôle central (7) étant accouplée par articulation au système à levier coudé (34);
    une nervure de raccordement isolante à agencement transversal (38), reliant les porte-contacts (24) de toutes les unités de contact (9...11);
    caractérisé en ce que
    la nervure de raccordement (38) contient un noyau d'acier (40) en forme de tige, surmoulé de tous les côtés d'une matière de moulage, s'étendant au-dessus des ressorts de compression de contact (26);
    les porte-contacts (24) sont composés d'une matière de moulage isolante et sont reliés d'une seule pièce à la nervure de raccordement (38);
    une tôle de retenue (42) est reliée de manière rigide à la nervure de raccordement (38) dans un espace de pôle central (7), accouplée par articulation au mécanisme d'actionnement (30) et agencée par pivotement dans les panneaux latéraux (28);
    les conducteurs de raccordement flexibles (17) sont reliés aux rails de courant correspondants (13) dans la région proche de l'axe de pivotement géométrique (S1) de la tôle de retenue (42) et s'étendent de manière pratiquement radiale par rapport à l'axe de pivotement (51).
  2. Disjoncteur selon la revendication précédente, caractérisé en ce que la tôle de retenue (42) a une forme en U, ses branches externes (46) renfermant latéralement le porte-contact (24) de l'unité de contact centrale (10), la tôle de retenue étant agencée dans les panneaux latéraux (28).
  3. Disjoncteur selon la revendication précédente, caractérisé en ce que la tôle de retenue (42) est vissée par au moins un coude (48) formé sur une extrémité de sa branche centrale (44) sur la nervure de raccordement (38).
  4. Disjoncteur selon la revendication précédente, caractérisé en ce que des leviers coudés inférieurs (36) du système à levier coudé (34) sont fixées par articulation sur les branches externes (46) dans les panneaux latéraux (28), pratiquement au milieu entre le au moins un coude (58) et les paliers (50) des branches externes (46).
  5. Disjoncteur selon l'une des revendications précédentes, caractérisé en ce que les paliers (50) de la tôle de retenue (42) sont constitués par des charnières rivées (28) dans les panneaux latéraux.
  6. Disjoncteur selon l'une des revendications précédentes, caractérisé en ce qu'une patte de support (60) est reliée d'une part de manière immobile au porte-contact (24) des deux unités de contact externes (9, 11) et est fixée d'autre part par articulation dans la partie inférieure (2).
  7. Disjoncteur selon la revendication précédente, caractérisé en ce qu'une patte de support (60) est respectivement reliée par l'intermédiaire d'une charnière rivée articulée (62) à une équerre de support (64), fixée entre le rail de courant fixe (13) de l'unité de contact correspondante (9, 11) et le fond (3) de la partie inférieure (2).
EP20030010745 2002-05-17 2003-05-14 Disjoncteur pour courants élevés et basse tension Expired - Fee Related EP1363300B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10222011 2002-05-17
DE2002122011 DE10222011C1 (de) 2002-05-17 2002-05-17 Leistungsschalter für hohe Ströme und Niederspannung

Publications (3)

Publication Number Publication Date
EP1363300A2 EP1363300A2 (fr) 2003-11-19
EP1363300A3 EP1363300A3 (fr) 2004-06-09
EP1363300B1 true EP1363300B1 (fr) 2008-03-26

Family

ID=29265345

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030010745 Expired - Fee Related EP1363300B1 (fr) 2002-05-17 2003-05-14 Disjoncteur pour courants élevés et basse tension

Country Status (2)

Country Link
EP (1) EP1363300B1 (fr)
DE (1) DE10222011C1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8901446B2 (en) 2011-02-08 2014-12-02 Siemens Aktiengesellschaft Limit stop apparatus, circuit breakers including limit stops, and methods of using same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4598186A (en) * 1983-05-09 1986-07-01 Square D Company Vent arrangement for high amperage molded case circuit breaker
FR2583571B1 (fr) * 1985-06-12 1994-02-18 Merlin Et Gerin Disjoncteur basse tension a coupure amelioree.
US4849589A (en) * 1987-08-31 1989-07-18 Square D Company Contact assembly for a circuit breaker
US4866225A (en) * 1988-09-08 1989-09-12 Siemens Energy & Automation, Inc. Insulated light weight metallic crossbar in polyphase circuit breaker assemblies for inhibiting arcing
FR2650434B1 (fr) * 1989-07-26 1995-11-24 Merlin Gerin Disjoncteur basse tension a contacts multiples et a fortes intensites
FR2744563B1 (fr) * 1996-02-06 1998-04-03 Schneider Electric Sa Mecanisme de commande d'un disjoncteur a verrou debrayable sur un court-circuit
WO2001024207A1 (fr) * 1999-09-30 2001-04-05 Siemens Aktiengesellschaft Disjoncteur basse tension a chambre de commutation et porte-contact mobile
US6225884B1 (en) * 1999-12-21 2001-05-01 Eaton Corporation Circuit breaker with mechanical trip load terminal/magnet barrier
FR2807565B1 (fr) * 2000-04-10 2003-03-14 Schneider Electric Ind Sa Pole pour un disjoncteur electrique limiteur de basse tension de puissance et disjoncteur muni d'un tel pole

Also Published As

Publication number Publication date
EP1363300A3 (fr) 2004-06-09
DE10222011C1 (de) 2003-11-20
EP1363300A2 (fr) 2003-11-19

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