EP3149756B1 - Disjoncteur doté d'une fixation de barre omnibus améliorée - Google Patents

Disjoncteur doté d'une fixation de barre omnibus améliorée Download PDF

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Publication number
EP3149756B1
EP3149756B1 EP15723970.8A EP15723970A EP3149756B1 EP 3149756 B1 EP3149756 B1 EP 3149756B1 EP 15723970 A EP15723970 A EP 15723970A EP 3149756 B1 EP3149756 B1 EP 3149756B1
Authority
EP
European Patent Office
Prior art keywords
circuit breaker
housing
holding element
bus bar
contact arm
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.)
Active
Application number
EP15723970.8A
Other languages
German (de)
English (en)
Other versions
EP3149756A1 (fr
EP3149756B8 (fr
Inventor
Volker Heins
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 Intelligent Power Ltd
Original Assignee
Eaton Electrical IP GmbH and Co KG
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 Eaton Electrical IP GmbH and Co KG filed Critical Eaton Electrical IP GmbH and Co KG
Publication of EP3149756A1 publication Critical patent/EP3149756A1/fr
Publication of EP3149756B1 publication Critical patent/EP3149756B1/fr
Application granted granted Critical
Publication of EP3149756B8 publication Critical patent/EP3149756B8/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/36—Metal parts
    • H01H9/362—Mounting of plates in arc chamber
    • 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
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
    • H01H73/02—Details
    • H01H73/04—Contacts
    • H01H73/045—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/345—Mounting of arc chutes

Definitions

  • the invention relates to a circuit breaker, comprising a housing, a busbar fixedly arranged in the housing and a movable contact arm cooperating with the busbar.
  • a circuit breaker of the above type is basically known.
  • the EP 0 209 058 A2 and the US 2010/0170875 A1 For this purpose, examples are disclosed in which the bus bar, which is fixedly arranged in the housing, is screwed from the outside to a wall of the housing.
  • An object of the present invention is therefore to provide an improved attachment of a busbar.
  • the structure of the circuit breaker should be simplified.
  • the retaining element outside the overlapping region is connected to a wall of the housing, wherein the busbar comes to lie or is clamped between the retaining element and the said wall.
  • the circuit breaker has an arc guiding device and / or arc quenching device and a metal sheet of the arc guiding device or arc quenching device is provided as the holding element.
  • the holding element fulfills a dual function in that it serves on the one hand for fixing the busbar, but on the other hand also a part of the arc guiding device or Arc quenching device forms. The circuit breaker can therefore be made with very little effort.
  • the holding element consists of an insulating material or is encased by such a material. In this way it is avoided that metallic, the insulating holding member contacting components lead the electrical voltage of the busbar. Screws or rivets for the attachment of the retaining element are therefore not under electrical tension.
  • insulating materials are for example insulating plastics, ceramics or the like into consideration.
  • the insulating support member between the busbar and the contact arm is arranged.
  • the electrical insulation between the busbar and the contact arm can be improved, in particular in the region near the pivot point of the support arm. In this area, the insulation distance increases only slightly with a rotation of the contact arm in the OFF position or TRIPPED position.
  • the holding element thus fulfills a dual function also in this embodiment of the circuit breaker.
  • the insulating support member has a plurality of aligned in the direction of the contact arm ribs.
  • the insulating support member has at least partially a U-shaped cross-section, in three ribs an E-shaped cross-section.
  • the ribs are guided past an electrical contact of the contact arm, in particular on a contact plate thereof, and project beyond this at least in an ON position of the contact arm. As a result, an electrical flashover to adjacent contacts on other electrical potential is prevented or at least made more difficult.
  • the ribs project beyond the electrical contact of the contact arm, in particular the contact plate thereof, in an OFF position and / or RELAXED position of the contact arm.
  • the risk of electrical flashover to adjacent live parts is also reduced in its OFF position and / or TRIPPED position. This is particularly advantageous if the electrical supply line is not guided via the busbar but on the contact arm and therefore this is constantly under electrical voltage.
  • the busbar is elongated, the said holding element projects laterally beyond the busbar on both sides and the holding element is connected on both sides of the busbar to the housing.
  • the busbar and the holding element form in this embodiment of the circuit breaker as it were an intersection, or the support member is like a bow over the busbar.
  • the busbar is held in this way particularly well in the housing.
  • busbar is fixed in position by the said holding element or by its connection to the housing at least in one direction transversely to the plane of the overlap region in the housing.
  • said direction with the direction of movement of the Contact arm matches or with this at least one common component, a well reproducible switching behavior is achieved by these measures.
  • the busbar is fixed in position only by the said holding element, respectively by its connection to the housing at least in one direction transversely to the plane of the overlap region in the housing.
  • the circuit breaker thus eliminates further means for holding the busbar.
  • the structure of the circuit breaker is thus particularly simple.
  • a screw connection or riveting takes place from the inside of the housing. This avoids that metallic parts are guided from the inside of the circuit breaker on the outside. Threat by a voltage applied to a screw or rivet tension is effectively avoided in this way.
  • the holding element is made of an electrically insulating material, but a screwing or riveting can also be done from the outside. Under certain circumstances, the workflow during assembly of the circuit breaker is simplified. Since the screws or rivets in this case lead so no electrical voltage, there is no risk of electric shock without separate cover. It is also conceivable, of course, that the screws and / or rivets for fastening the retaining element are made of an insulating material. Conceivable, for example, screws or (spreader) rivets made of plastic or high-strength ceramics.
  • the housing has a thickening in a connection region with said retaining element.
  • a thickening in particular a screw dome, despite the generally thinner wall thickness of the housing, a required screw-in depth can be achieved.
  • the said holding element is glued or welded to the housing.
  • electrically conductive connection means such as screws or rivets made of metal.
  • the holding member is made of the same material as the housing, a very durable connection can be made by welding. Bonding is particularly suitable for the connection of different materials, for example, when a Lichtbogenleit- or arc splitter to be attached to the housing.
  • busbar is elastically deformed by the said retaining element connected to the housing.
  • component tolerances can be well compensated without a reliable fixation of the busbar in the housing would be endangered.
  • Fig. 1 shows an oblique view of an exemplary circuit breaker 1, which has a housing 2, which comprises a housing lower part 3 and a housing upper part 4. Furthermore, the circuit breaker 1 comprises a bus bar 5 with a housing-external connection and an actuating element 6 for switching on and off the circuit breaker 1, respectively, for indicating the switching state of the circuit breaker. 1
  • Fig. 2 shows the circuit breaker 1 off Fig. 1 with lifted housing upper part 4, whereby the view is released into the interior of the circuit breaker 1.
  • a shift shaft 7 is rotatably mounted.
  • a plurality of contact arms 8 are rotatably mounted in the switching shaft 7, which each have a switching contact 9 at its end.
  • a housing-fixed contact 11 see also Figure 3 .
  • the bus bar 5 In the closed position of the contact arm 8 and the switch contact 9 against a housing-fixed contact 11 (see also Figure 3 ) are pressed on the bus bar 5, so that their terminal and the terminal 10 are electrically connected.
  • With excessive current through the busbar 5 and the terminal 10 of the contact arm 8 through spun electrodynamic forces and remains after the triggering to the rotation of the switching shaft 7 in the OFF position in the OPEN position.
  • Fig. 3 shows the circuit breaker 1 off Fig. 1 with lifted housing top 4 now from a slightly different perspective and with the busbar 5, a support member 12 and mounting screws 13 in an exploded view.
  • the holding element 12 contacts the busbar 5 in an overlapping region, projects transversely there, in particular in a plane of the overlapping region, and is connected outside the overlap region with the housing lower part 3, wherein the busbar 5 is clamped between the holding element 12 and the housing lower part 3.
  • the circuit breaker 1 comprises an arc guiding device and / or arc-quenching device, wherein a metal sheet of the arc guiding device or arc-quenching device is provided as the holding element 12.
  • the Fig. 4 shows the arrangement Fig. 3 in partially assembled state, wherein in the two right chambers of the circuit breaker 1 sheets 14 of the arc guiding device / arc quenching device can be seen. In the leftmost chamber, these sheets 14 are not shown and therefore give the view on the plate 12, which is fastened with the screws 13 on the lower housing part 3 and thus fixed the busbar 5. Moreover, in the Fig. 4 also the switching shaft 7 is shown with the contact arms 8.
  • FIG. 5 a plan view of the in the Fig. 4 shown arrangement in the region of the leftmost switching chamber shown, and in the FIGS. 6 and 7 the cuts AA and BB.
  • the section AA is located at the height of the busbar center, the section BB at the level of the fastening screws 13.
  • the contact arm 8 is in each case in the ON position.
  • the housing 2 has thickenings in a connection region with the sheet 12, so that despite otherwise thin wall thickness of the housing 2 a required screwing is achieved.
  • the sheet 12 is bolted to the housing 2. It would also be conceivable, for example, for the sheet metal 12 to be riveted to the housing 2 (for example with expanding rivets) or connected in some other way. For example, the sheet 12 may be glued to the housing 2. It is also conceivable that different attachment methods are combined and the sheet 12 is screwed and glued, for example.
  • the busbar 5 is elongated, the metal sheet 12 projects laterally beyond the busbar 5 on both sides, and the metal sheet 12 is connected to the housing 2 on both sides of the busbar 5.
  • the bus bar 5 is held particularly well in the housing 2 and is fixed in position at least in one direction transversely to the plane of the overlapping area in the housing 2 (in the figures, the named direction is aligned in particular vertically or normally on the housing bottom).
  • the busbar 5 is also held vertically by the housing wall through which the busbar 5 is guided. It is also conceivable, however, that the busbar 5 is vertically fixed in position only by said sheet 12.
  • busbar 5 is elastically deformed during assembly of the sheet 12. As a result, component tolerances can be compensated well, without thereby a reliable fixation of the busbar 5 in the housing 2 would be jeopardized.
  • Fig. 8 shows another example of a circuit breaker 1, which in the FIGS. 1 to 7 illustrated circuit breaker 1 is very similar.
  • the holding element is made of an insulating material or at least coated with such.
  • an insulating plastic part 15 is provided as a holding element, in particular bow-like over the Busbar 5 is guided.
  • the screws 13 in this embodiment therefore, no electrical voltage, whereby in principle a screw from the outside would be possible without a separate cover for the isolation of the circuit breaker 1 would have to be used.
  • the holding element 15 is made in this example of plastic, but equally would be the use of other electrically insulating materials conceivable.
  • the holding element 15 could be made of ceramic.
  • FIGS. 9 to 12 Now show another example of a circuit breaker 1, which similar to that in Fig. 8 shown circuit breaker 1 is.
  • an insulating plastic part 16 between the busbar 5 and the contact arm 8 is arranged.
  • the electrical insulation between the busbar 5 and the contact arm 8 can be improved, in particular in the area close to the pivot point of the contact arm 8. In this area, the insulation distance increases upon rotation of the contact arm 8 from the ON position to the OFF position or RELEASE position only slightly.
  • the plastic part 16 thus fulfills a dual function.
  • the holding element 16 could again be made of ceramic.
  • FIG. 9 an exploded view of the lower housing part 3, the busbar 5, the plastic part 16 and the mounting screws 13 is shown.
  • the components mentioned are in the mounted state.
  • Fig. 11 a plan view of the in the Fig. 10 shown arrangement in the area of the extreme right switching chamber shown, as well as in the Fig. 12 the section CC at the level of the fastening screws 13.
  • the insulating plastic part 16 has a plurality of ribs 17, 18 and 19 aligned in the direction of the contact arm 8.
  • the ribs 17 and 18 are positioned laterally of the contact arm 8, whereas the center rib 19 projects between the two parts of the contact arm 8. This prevents an electrical flashover from emerging laterally from the contact arm 8, or such a risk is significantly mitigated.
  • the plastic part 16 may be made of a duroplastic for this purpose, which remains largely dimensionally stable even at the high temperatures occurring in the vicinity of an arc.
  • the insulating plastic parts 15, 16 are made of a thermoplastic. This material begins to melt under the influence of heat and subsequently evaporate or outgas. Due to the gases released during an arc, the deletion of the same is favorably influenced.
  • the ribs 17..19 can be made relatively large. Another measure is the provision of a midrib 19, as in the FIGS. 9 to 12 is shown.
  • the heat resistance of the thermoplastic of the insulating plastic parts 15, 16 can also be increased by crosslinking of the molecules.
  • One possible method for this is, for example, the irradiation with beta or gamma rays.
  • the insulating plastic parts 15, 16 do not start too early, that is, at too low a temperature, to melt and lose their shape.
  • this crosslinked / irradiated material has the advantageous gassing properties. That is, the material offers on the one hand a good (side) shielding of the arc, but contributes by the outgassing also to its deletion.
  • the ribs 17.19 project beyond the contact arm 8 or the switching contact 9 at least in an ON position of the contact arm 8. As a result, an electrical flashover to adjacent contacts on other electrical potential is prevented or at least made more difficult. In addition, it is particularly advantageous. when the ribs 17..19 project beyond the contact arm 8 or the switching contact 9 in an OFF position and / or TRIPPED position of the contact arm 8. In this embodiment of the circuit breaker, the risk of electrical flashover to adjacent live parts is also reduced in its OFF position and / or TRIPPED position. This is particularly advantageous if the electrical supply does not have the Busbar 5 but is guided over the contact arm 8 and therefore this is constantly under electrical voltage.
  • the insulating plastic part 15, 16 is screwed to the housing 2. It would also be conceivable, for example, that the insulating plastic part 15, 16 is glued or welded to the housing 2. The use of rivets is of course conceivable. It is also conceivable that different attachment methods are combined and the insulating plastic part 15, 16 riveted and welded, for example.
  • circuit breaker 1 and its components are not necessarily shown to scale and therefore may have other proportions.
  • a circuit breaker 1 may also comprise more or fewer components than illustrated.
  • Location information (for example, “top”, “bottom”, “left”, “right”, etc.) are based on the respective figure described and are in a change in position of the circuit breaker 1 mutatis mutandis to adapt to the new situation.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Breakers (AREA)

Claims (15)

  1. Disjoncteur (1), comprenant un boîtier (2), une barre conductrice (5) agencée fixement dans le boîtier (2) et un bras de contact (8) mobile coopérant avec la barre conductrice (5),
    caractérisé en ce que
    - un élément de maintien (12, 15, 16) touche la barre conductrice (5) dans une zone d'intersection,
    - l'élément de maintien (12, 15, 16) dépasse transversalement la barre conductrice (5) et
    - l'élément de maintien (12, 15, 16) est relié au boîtier (2) en dehors de la zone d'intersection, la barre conductrice (5) étant coincée entre l'élément de maintien (12, 15, 16) et le boîtier (2).
  2. Disjoncteur (1) selon la revendication 1, caractérisé en ce qu'il comporte un dispositif conducteur d'arc électrique et/ou un dispositif extincteur d'arc électrique et en ce qu'une tôle (12) du dispositif conducteur d'arc électrique ou du dispositif extincteur d'arc électrique est prévue comme élément de maintien.
  3. Disjoncteur (1) selon la revendication 1 ou 2, caractérisé en ce que l'élément de maintien (15, 16) est fabriqué en un matériau électriquement isolant ou est enveloppé par un matériau de ce type.
  4. Disjoncteur (1) selon la revendication 3, caractérisé en ce que l'élément de maintien (15, 16) isolant est agencé entre la barre conductrice (5) et le bras de contact (8).
  5. Disjoncteur (1) selon la revendication 4, caractérisé en ce que l'élément de maintien (15, 16) isolant comporte plusieurs nervures (17, 18, 19) orientées dans la direction du bras de contact (8).
  6. Disjoncteur (1) selon la revendication 5, caractérisé en ce que les nervures (17, 18, 19) sont guidées devant un contact électrique (9) du bras de contact (8) et dépassent celui-ci au moins dans une position MARCHE du bras de contact (8).
  7. Disjoncteur (1) selon la revendication 5 ou 6, caractérisé en ce que les nervures (17, 18, 19) dépassent le contact électrique (9) du bras de contact (8) dans une position ARRÊT et/ou dans une position DÉCLENCHÉ du bras de contact (8).
  8. Disjoncteur (1) selon l'une des revendications 1 à 7, caractérisé en ce que la barre conductrice (5) est formée en longueur, ledit élément de maintien (12, 15, 16) dépasse latéralement des deux côtés de la barre conductrice (5) et l'élément de maintien (12, 15, 16) est relié des deux côtés de la barre conductrice (5) au boîtier (2).
  9. Disjoncteur (1) selon l'une des revendications 1 à 8, caractérisé en ce que la barre conductrice (5) est fixée en position par ledit élément de maintien (12, 15, 16) respectivement par sa liaison avec le boîtier (2) au moins dans une direction transversale par rapport au plan de la zone d'intersection dans le boîtier (2).
  10. Disjoncteur (1) selon la revendication 9, caractérisé en ce que la barre conductrice (5) est fixée en position seulement par ledit élément de maintien (12, 15, 16) respectivement par sa liaison avec le boîtier (2) au moins dans une direction transversale par rapport au plan de la zone d'intersection dans le boîtier (2).
  11. Disjoncteur (1) selon l'une des revendications 1 à 10, caractérisé en ce que ledit élément de maintien (12, 15, 16) est vissé ou rivé avec le boîtier (2).
  12. Disjoncteur (1) selon la revendication 11, caractérisé en ce qu'un vissage ou un rivetage s'effectue à partir du côté intérieur du boîtier (2).
  13. Disjoncteur (1) selon l'une des revendications 1 à 12, caractérisé en ce que le boîtier (2) comporte un épaississement dans une zone de liaison avec ledit élément de maintien (12, 15, 16).
  14. Disjoncteur (1) selon l'une des revendications 1 à 13, caractérisé en ce que ledit élément de maintien (12, 15, 16) est collé ou soudé au boîtier (2).
  15. Disjoncteur (1) selon l'une des revendications 1 à 14, caractérisé en ce que la barre conductrice (5) est déformée élastiquement par ledit élément de maintien (12, 15, 16) relié au boîtier (2).
EP15723970.8A 2014-05-30 2015-05-22 Disjoncteur doté d'une fixation de barre omnibus améliorée Active EP3149756B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014107634.6A DE102014107634A1 (de) 2014-05-30 2014-05-30 Schutzschalter mit verbesserter Befestigung einer Stromschiene
PCT/EP2015/061438 WO2015181089A1 (fr) 2014-05-30 2015-05-22 Disjoncteur doté d'une fixation de barre omnibus améliorée

Publications (3)

Publication Number Publication Date
EP3149756A1 EP3149756A1 (fr) 2017-04-05
EP3149756B1 true EP3149756B1 (fr) 2018-07-04
EP3149756B8 EP3149756B8 (fr) 2018-09-12

Family

ID=53200008

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15723970.8A Active EP3149756B8 (fr) 2014-05-30 2015-05-22 Disjoncteur doté d'une fixation de barre omnibus améliorée

Country Status (3)

Country Link
EP (1) EP3149756B8 (fr)
DE (1) DE102014107634A1 (fr)
WO (1) WO2015181089A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4642431A (en) 1985-07-18 1987-02-10 Westinghouse Electric Corp. Molded case circuit breaker with a movable electrical contact positioned by a camming spring loaded clip
EP0225207B1 (fr) * 1985-10-31 1991-05-15 Merlin Gerin Chaîne cinématique de transmission entre le mécanisme de commande et les pôles d'un disjoncteur électrique à boîtier isolant moulé
DE102008016963A1 (de) * 2008-03-31 2009-10-01 Siemens Aktiengesellschaft Schaltgerät, insbesondere Leistungsschaltgerät, sowie mehrpolige Schaltgerätekombination
US7830232B2 (en) 2009-01-06 2010-11-09 Eaton Corporation Arc runner assembly and electrical switching apparatus and method incorporating same
EP2573787A1 (fr) * 2011-09-21 2013-03-27 Siemens Aktiengesellschaft Commutateur de puissance doté d'une stabilisation de boîtier optimisée, notamment à puissance de commutation élevée

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
WO2015181089A1 (fr) 2015-12-03
EP3149756A1 (fr) 2017-04-05
EP3149756B8 (fr) 2018-09-12
DE102014107634A1 (de) 2015-12-03

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