EP4338180A1 - Contact mobile configuré pour être intégré dans un disjoncteur - Google Patents
Contact mobile configuré pour être intégré dans un disjoncteurInfo
- Publication number
- EP4338180A1 EP4338180A1 EP22727878.5A EP22727878A EP4338180A1 EP 4338180 A1 EP4338180 A1 EP 4338180A1 EP 22727878 A EP22727878 A EP 22727878A EP 4338180 A1 EP4338180 A1 EP 4338180A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fingers
- movable contact
- interdigital
- contact
- finger
- 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
Links
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
- 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
Definitions
- Movable contact configured to be integrated into a circuit breaker
- the present invention relates to the field of contact interfaces in rupture mechanisms inside circuit breakers and more particularly to the field of arrangements of these contact interfaces.
- a circuit breaker incorporates a mechanism for actuating the electrical break in the event of an overload or overvoltage along the circuit on which the circuit breaker is positioned.
- This mechanism involves a pair of contact elements arranged in an interrupting chamber which, in the connection position one against the other, ensures circulation of the electric current and, in the separated position, stops any electrical continuity between the two contact elements.
- these contact elements are made in the form, on the one hand, of a fixed contact with the support structure of the circuit breaker and, on the other hand, of a moving contact that can be moved with respect to the fixed contact.
- the two contacts, fixed and mobile carry respective surfaces intended to bear against each other to ensure the passage of electric current.
- the surface of the moving contact resting against the surface of the fixed contact must be large enough to ensure optimization of the electrical flow through which the breaking mechanism of the circuit breaker passes.
- connection made by the movable contact against the fixed contact is made at the level of a structure made of conductive material which has a plurality of fingers arranged parallel to each other, so that the surface of each of the fingers bears a surface intended to bear against the surface of a fixed contact.
- a structure made of conductive material which has a plurality of fingers arranged parallel to each other, so that the surface of each of the fingers bears a surface intended to bear against the surface of a fixed contact.
- the production of a movable contact in the form of several fingers spaced from each other makes it possible to guarantee an optimal contact surface between the plane of each moving fingers and the flat surface of the stationary contact.
- the moving contact incorporates separation elements at its interdigital spaces. These elements correspond to essential parts for holding the various fingers of the moving contact in parallel orientations to each other and thus ensuring optimum distribution of the bearing surfaces of the fingers of the moving contact against the surface of the fixed contact.
- the dimensions of the interrupting chamber which forms the volume occupied by the moving contact are also conditioned by space constraints. These constraints then impose maximum values on the lengths of the moving contact and in particular on the width of the surface of the moving contact resting against the fixed contact.
- the present invention aims to overcome these various drawbacks by proposing a solution which allows an improvement in the electrical intensity likely to be supported by a circuit breaker together with a reduction in the amplitude of heating of its contacts, while meeting the sizing constraints of the interrupting chamber solved by existing devices.
- the invention thus relates to a movable contact configured to be integrated into a circuit breaker resting against a fixed contact close to an interrupting chamber, the movable contact having the shape of several fingers juxtaposed in a substantially parallel manner and aligned with each other and joined by one of their ends to a common core, characterized in that the interdigital spaces separating the respective surfaces of two juxtaposed fingers of the moving contact have a spacing width whose value is equal to or less than 1.3 millimeter.
- FIG. 1 represents a schematic illustration of an example arrangement of a moving contact according to the invention
- FIG. 2 represents a schematic illustration according to an exploded view of an example arrangement of a moving contact according to the invention
- FIG. 3 represents a schematic illustration of an example of a finger of a movable contact according to the invention incorporating a separation element
- FIG. 4 represents a schematic illustration of an example of a separation element for a finger of a moving contact according to the invention.
- the invention relates to a movable contact 1 configured to be integrated into a circuit breaker resting against a fixed contact close to a interrupting chamber, the movable contact having the shape of several fingers 2 juxtaposed in a substantially parallel manner and aligned with each other and joined by one of their ends 2a to a common trunk 2b, characterized in that the interdigital spaces 3 separating the respective surfaces of two juxtaposed fingers 2 of the movable contact 1 have a spacing width whose value is equal to or less than 1.3 millimeters.
- the movable contact 1 comprises at least six contact fingers 2 respectively associated with at least one separating element 4 positioned at the level of the interdigital spaces 3 separating two juxtaposed fingers 2, the separating element 4 having a resistivity greater than or equal to 70 ⁇ 10 ⁇ 8 Qm (Ohms meters).
- the separating element 4 is made of stainless steel. This arrangement incorporating a separation element 4 confers rigidity on the pair of fingers 2 arranged on either side of an interdigital space 3 so as to limit the risk of deformation of the fingers 2 and restrict the risk that two fingers 2 juxtaposed comes into contact in the event of a deformation of at least one of them.
- each of the six fingers 2 of the movable contact 1 has a width of the order of 6 millimeters with separation by interdigital spaces 3 of the order of 1.2 millimeters.
- This construction thus allows the positioning of a movable contact 1 comprising six fingers 2 inside an interrupting chamber having a width of the order of 46 millimeters.
- Such a particular arrangement of a movable contact 1 with six fingers 2 thus corresponds to a preferred embodiment where the number of contact fingers 2 with such dimensions makes it possible to optimize the combination between, on the one hand, the resistance to electrical intensity supported by the circuit breaker and, on the other hand, the limitation of the temperature rise of its contacts, in a breaking chamber 46 millimeters wide, that is to say in a circuit breaker allocating a volume of 70 millimeters for the positioning of a contact pair, mobile and fixed.
- the various juxtaposed fingers 2 of the movable contact 1 have dimensions substantially identical to the less in section in a plane perpendicular to the main axis of the fingers 2.
- This identity of section makes it possible to obtain an exchange surface gain of 20% with respect to the total exchange section between the fixed contact and the contact mobile of the prior art which consists of five fingers 2.
- Such an arrangement makes it possible to obtain an increase in performance between the mobile contact and the fixed contact, so that, on the one hand, the ICW value of the circuit breaker is able to reach 55 kA and that, on the other hand, the heating temperature is likely to be reduced by 5K compared to the known devices of the prior art.
- the various juxtaposed fingers 2 of the movable contact 1 have substantially identical dimensions to the less in section in a plane perpendicular to the main axis of the fingers 2.
- This homogeneity of shape and construction of the different fingers 2 between them makes it possible to obtain a similar, if not identical, distribution between the different fingers 2 of the electric current moving in the movable contact 1.
- the stresses supported at the level of each of the fingers 2 are also identical, so that an optimization of the performance of the mobile contact 1 is able to be achieved more easily.
- the faces 2a of each of the two fingers 2 juxtaposed contact are associated with a respective separation element 4.
- This arrangement positioning a pair of separation elements 4 at the level of each interdigital space 3 allows the displacement of one separation element 4 relative to another by friction of the respective surfaces against each other in this interdigital space 3
- the positioning of a pair of separation elements 4 in an interdigital space 3 allows the placement of doubled insulation between two juxtaposed fingers, both thermally and electrically.
- each of the separating elements 4 is mounted fixed with a respective finger 2 so that each of the separating elements 4 is likely to rub against the surface of its counterpart.
- the interdigital space 3 comprises a separation element 4 associated with a respective finger 2 of the movable contact 1 so that the displacement of one of the fingers of the movable contact 1 with respect to its juxtaposed neighbor takes place by the sliding between them of the surfaces of the separation elements 4 respectively associated with each of the fingers 2 which surrounds the interdigital space 3.
- At least one separating element 4 made of stainless steel present, according to a plan section in a plane perpendicular to the main axis of the fingers 2, a jumper arrangement configured to be inserted against an interdigital face 2a of a finger 2 so that the legs are positioned at the level of two opposite faces 2a of the finger 2 which have a common edge with the interdigital face 2a.
- This arrangement of the separation element 4 in the form of a jumper makes it possible to provide thermal and electrical insulation of the finger 2 at several of its faces.
- such a jumper arrangement of the separation element 4 makes it possible to carry out mounting and easy assembly of the separation element 4 with a finger 2 dedicated to the movable contact 1 by inserting the finger 2 between the legs of the separation element 4.
- the separation element 4 is positioned on the finger 2 by a clipping mechanism which operates in particular by pinching.
- At least one stainless steel separating element 4 has, according to a plane in section in a plane perpendicular to the main axis of the fingers 2, a horse-like arrangement whose legs are arranged to cover at least the major part of the interdigital faces 2a positioned on either side of a same finger 2.
- Such an arrangement of the separating element 4 makes it possible to operate a covering of a large, even essential, portion of the side surfaces 2a of the fingers 2 positioned opposite a surface of a homologous finger.
- the separation element 4 as characterized makes it possible to operate a thermal and electrical insulation between two juxtaposed fingers along a significant portion of the interdigital space 3.
- At least one edge of one of the legs of the jumper of the separation element 4 has a retaining means 41 positioned against one of the faces of the finger 2 which have a common edge with an interdigital face 2a covered by a leg of the separation element 4.
- this retaining means 41 is arranged to cooperate with one of the faces of the fingers 2 so as to restrict, or even block, a sliding of the surface of a leg of the separating element 4 against the interdigital surface of the finger 2 against which it bears.
- This retaining means 41 is capable of taking the form of a tab formed by a continuity of material with the leg of the separating element 4 and curved to be arranged in a plane substantially parallel to the portion of the rider which operates the junction between the two legs.
- the relative flexibility of the rider's legs with respect to the junction portion thus allows insertion of the rider of the separating element 4 on the finger 2 until the tab of the retaining means 41 cooperates with a surface of the finger 2 opposite to the surface of the finger 2 intended to interact with the portion of the jumper which operates the junction between the two legs of the separation element 4.
- the insertion of the jumper of the separation element 4 on the finger 2 then operates a pinching of the finger 2 by the legs of the separating element 4.
- At least the portion of the separation element 4 positioned against the interdigital surface of a finger has a thickness whose value is equal to or less than 0.7 millimeters, preferably a value of the order of 0.6 millimeters.
- At least one separation element 4 comprises a means spring configured to separate two juxtaposed separating elements.
- this spring means is produced by at least one relief of the separating element 4 at the level of one of its surfaces intended to be positioned against an interdigital surface of a finger or in an interdigital space.
- This relief is likely to take the form a boss providing a moderate variation in the flatness of the surface of the separating element 4 with respect to the plane of the interdigital surface, so that the curvature of the boss causes a separation of a portion of the surface of the separation element 4 with respect to the rest of the surface of the separation element bearing against the interdigital surface of the finger 2.
- the curvature of the boss allows a certain flexibility in its deformation so as to produce a spring means in a manner similar to that of a Belleville washer integrated in a portion of the separating element 4.
- the spring means is produced by a washer Belleville associated with a surface portion of the separating element 4 intended to be positioned in an interdigital space.
- the surface of at least one separation element 4 in bearing against the interdigital face of a finger 2 has a shape and dimensions substantially identical to a major portion of the surface of the interdigital face of the finger 2 against which the separating element 4 is positioned.
- Such a similarity of surface makes it possible to operate an optimized contact in support of the separating element 4 against the interdigital face of a finger 2, so as to ensure a maintenance of the finger 2 of the movable contact 1 according to the orientation of its axis along a most important portion.
- the movable contact 1 is associated with a rectilinear pivot axis 5 mounted through through through-holes 10, 14 carried by each of the fingers 2 of the moving contact 1 and the associated separation elements 4.
- This rectilinear pivot axis 5 defines the pivot axis of each of the fingers 2 of the moving contact 1 in the context of its operation to separate the moving contact 1 from the fixed contact in the event of an overload or electrical overvoltage along the circuit on which the circuit breaker which integrates the contacts, mobile and fixed, is located positioned.
- these through holes 14 are centered on these spring means.
- the spring means takes the form of a curved boss
- the through hole 14 is centered on the boss so that the arrangement of the boss appears similar to a Belleville washer embedded in a portion of the separating element 4 and traversed by the rectilinear pivot axis 5.
- the moving contact 1 also comprises at least one stainless steel separator 40 positioned against the face opposite the interdigital face of a finger 2 at the end of the moving contact 1.
- This separator 40 is intended to be positioned at one of the lateral ends of the moving contact 1, against the side surfaces of the fingers 2 of the moving contact 1 positioned at the ends and which do not correspond to interdigital surfaces.
- separators 40 positioned at the ends thus fulfill a function similar to that of the interdigital separating elements 4 by ensuring a separation between, on the one hand, a lateral surface of a finger 2 of the movable contact 1 positioned at the end and, on the other hand, a surface of a support structure of the breaking mechanism which incorporates the movable contact 1 of the invention. It should be noted that this separator 40 positioned at the lateral end of moving contact 1 is likely to be formed by the leg of the rider of a separating element 4 mounted on a finger positioned at the end of moving contact 1.
Landscapes
- Breakers (AREA)
- Contacts (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2104980A FR3122944B1 (fr) | 2021-05-11 | 2021-05-11 | Contact mobile configuré pour être intégré dans un disjoncteur |
| PCT/EP2022/062213 WO2022238242A1 (fr) | 2021-05-11 | 2022-05-05 | Contact mobile configuré pour être intégré dans un disjoncteur |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4338180A1 true EP4338180A1 (fr) | 2024-03-20 |
| EP4338180B1 EP4338180B1 (fr) | 2026-03-04 |
Family
ID=76920914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22727878.5A Active EP4338180B1 (fr) | 2021-05-11 | 2022-05-05 | Contact mobile configuré pour être intégré dans un disjoncteur |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP4338180B1 (fr) |
| JP (1) | JP7638401B2 (fr) |
| CN (1) | CN117296116A (fr) |
| FR (1) | FR3122944B1 (fr) |
| WO (1) | WO2022238242A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3539788A1 (de) * | 1985-11-07 | 1987-05-14 | Siemens Ag | Kontaktanordnung mit kontakthebel voneinander trennenden zwischenlagen |
| US5899323A (en) * | 1998-05-07 | 1999-05-04 | Eaton Corporation | Electrical switching apparatus with contact finger guide |
| DE10132127C1 (de) * | 2001-06-28 | 2002-11-14 | Siemens Ag | Bewegbarer Kontaktträger für einen Niederspannungs-Leistungsschalter und Verfahren zu seiner Herstellung |
| DE10148947C1 (de) * | 2001-09-28 | 2003-02-13 | Siemens Ag | Schaltkontaktanordnung eines Niederspannungs-Leistungsschalters |
| US7518074B2 (en) * | 2006-10-13 | 2009-04-14 | Eaton Corporation | Electrical switching apparatus, and carrier assembly and independent pivot assembly therefor |
| US9805895B2 (en) * | 2015-11-17 | 2017-10-31 | Eaton Corporation | Electrical switching apparatus and clinch joint assembly therefor |
| CN105762038B (zh) * | 2016-04-29 | 2018-01-05 | 首瑞(天津)电气设备有限公司 | 断路器触头系统及断路器 |
-
2021
- 2021-05-11 FR FR2104980A patent/FR3122944B1/fr active Active
-
2022
- 2022-05-05 JP JP2023568495A patent/JP7638401B2/ja active Active
- 2022-05-05 WO PCT/EP2022/062213 patent/WO2022238242A1/fr not_active Ceased
- 2022-05-05 CN CN202280034404.5A patent/CN117296116A/zh active Pending
- 2022-05-05 EP EP22727878.5A patent/EP4338180B1/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2024517885A (ja) | 2024-04-23 |
| CN117296116A (zh) | 2023-12-26 |
| JP7638401B2 (ja) | 2025-03-03 |
| FR3122944A1 (fr) | 2022-11-18 |
| EP4338180B1 (fr) | 2026-03-04 |
| FR3122944B1 (fr) | 2023-11-10 |
| WO2022238242A1 (fr) | 2022-11-17 |
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