EP1423862A1 - Schaltkontaktanordnung mit einer einrichtung zur verstärkung einer zwischen schaltkontakten wirkenden kontaktkraft - Google Patents
Schaltkontaktanordnung mit einer einrichtung zur verstärkung einer zwischen schaltkontakten wirkenden kontaktkraftInfo
- Publication number
- EP1423862A1 EP1423862A1 EP02769933A EP02769933A EP1423862A1 EP 1423862 A1 EP1423862 A1 EP 1423862A1 EP 02769933 A EP02769933 A EP 02769933A EP 02769933 A EP02769933 A EP 02769933A EP 1423862 A1 EP1423862 A1 EP 1423862A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- fixed
- switch
- conductor piece
- recess
- 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
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
-
- 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
- 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
- H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
- H01H9/383—Arcing contact pivots relative to the movable contact assembly
-
- 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
- H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
Definitions
- the invention relates to a switch contact arrangement for a circuit breaker with a fixed conductor piece and a fixed switch contact attached to it, and with a movable conductor piece and an attached movable switch contact intended for flat contact with the fixed switch contact, the fixed and the movable conductor piece being approximately at right angles when the switch contacts are closed stand to each other, further with a device for amplifying a contact force acting between the switching contacts by means of a recess made transversely to the direction of the current in one of the conductor pieces.
- a switch contact arrangement of the type mentioned is known from US 2,777,921.
- the mentioned device for increasing a contact force acting between the switching contacts is particularly concerned with compensating opposing forces, that is to say separating the switching contacts from one another, as far as possible.
- These disruptive forces depend on the size of the current flowing through the switch contacts.
- switch contacts that meet butt as are used in particular in low-voltage circuit breakers
- these contact-lifting forces always occur because the physically unavoidable current forces are involved.
- an undesired opening of the switch contacts does not have to be permitted in the case of selective circuit breakers, that is to say those which have to carry a short-circuit current for a specified time without disconnection of the switch contacts.
- the invention is based on the known switch contact arrangement described at the outset, in which the current is deflected by means of a recess and a force of attraction that is dependent on the current is generated between the cooperating switch contacts. It is based on the task of simplifying the arrangement of the recess in such a way that it can be produced with simple means and that design changes to the switching contact arrangement for accommodating the recess are as small as possible. According to the invention, this object is achieved in that the recess is made in the fixed conductor piece such that the direction of the current in a part of the fixed conductor piece directly adjoining the fixed switching contact is oriented approximately parallel to the direction of the current in the movable conductor piece.
- the fixed switching contact is arranged on a partial surface of an end face of the fixed conductor piece facing the movable switching contact and a further partial surface forms a fixed pre-contact piece, the recess near the fixed switching contact being arranged approximately parallel to the end face and extends from an edge surface of the conductor piece parallel to the pre-contact piece into the fixed conductor piece.
- This incision can be filled with an electrically non-conductive or low-conductive filling (filler or filler material) in order to maintain the resistance of the fixed conductor piece to the forces that occur when switching.
- Another suitable possibility for forming the recess is to make closely adjacent parallel bores in the conductor piece. Due to the local reduction in the conductor cross-section, the bores, like the continuous recess, redirect the current parallel to the end face of the conductor piece. However, the webs remaining between the holes ensure increased mechanical stability. However, in connection with these bores, it is also possible to provide a strength corresponding approximately to a solid conductor piece, in which the bores are filled with a filling of the type mentioned.
- the figure shows in cross section a main current path of an indicated low-voltage circuit breaker 1.
- Figures 2 shows in section a fixed conductor section of a main current path or a switch contact arrangement, at a recess is formed as a plurality of bores.
- FIG. 3 shows the conductor piece according to FIG. 2 broken off from below.
- the circuit breaker 1 according to FIG. 1 has a main current path with a switch contact arrangement 2, in which main and preliminary contacts as well as arcing horns are provided in a known manner.
- the switch contact arrangement 2 comprises an upper fixed conductor piece 3, which is designed as a connecting rail of the circuit breaker 1 and is supported for this purpose in an opening in a rear wall 4 of the circuit breaker 1.
- the conductor piece 3 can have an essentially rectangular cross-sectional shape, to which a lower edge surface 5 and an inner end face 6 belong.
- a fixed switching contact 7 is attached to a partial surface of the end face 6 and is made in a known manner as a contact piece support from a special contact material. The remaining larger partial area of the end face 6 forms a fixed pre-contact piece 8.
- the movable part of the switching contact arrangement 2 is formed by an assembly composed of a plurality of components, which in particular includes a contact carrier 10 and a conductor piece 12 movable thereon about a pivot bearing 11.
- the contact carrier 10 is pivotally mounted at its lower end by means of a pivot pin 13 and can be moved in a known manner by a switching shaft 15 by means of a lever arrangement 14 for switching the switching contact arrangement 1 on and off.
- the movable conductor piece 12 has the known shape of a contact lever, which has a movable switching contact 16, a movable pre-contact 17 at its upper end and an arcing horn 18 is provided.
- the movable arcing horn 18 is on the upper edge surface of the conductor piece
- Flexible conductors 22 for connecting the conductor piece to a lower fixed conductor piece 23 are attached to an end part of the conductor piece 12 which projects beyond the pivot bearing 11.
- the conductor piece 23 is also supported on the rear wall 4 and extends parallel to the upper fixed conductor piece 3.
- the switch contact arrangement 2 can have a plurality of conductor pieces 12 arranged parallel to one another in a common contact carrier 10, which interact with jointly common conductor pieces 3 and 23 as well.
- a current flows through the upper fixed conductor piece 3, the switch contacts 7 and 16 which are present under the action of the contact force springs 20, the conductor piece 12 or the parallel conductor pieces 12 as well as the flexible conductor 22 and the lower conductor piece 23.
- the current forces explained at the outset occur between the switching contacts 7 and 16, which counteract the contact force applied by means of the contact force springs 20.
- a recess 24 arranged in the fixed conductor section 3 ensures that the aforementioned contact-lifting forces are at least partially compensated for.
- the recess 24 near the end face 6 of the conductor piece 3 is parallel arranged to the end face 6. It is expedient if the recess 24 extends over the entire width of the conductor piece 3.
- the recess 24 extends from the lower edge surface 5 and runs parallel to the end face 6 and the fixed pre-contact piece 8 formed by it.
- the recess 24 has the effect that a current entering or exiting the fixed switch contact 7
- Conductor piece 3 can not flow in a straight line in its longitudinal direction, but is caused by the recess 24 to deflect, which leads near the face 5 to a direction of the current running parallel to the face 6.
- the current in this part of the conductor piece 3 thus runs approximately parallel to the current in the movable conductor piece 12 (contact lever), which has an attractive effect. In this way, the contact-withdrawing electricity forces are completely or partially balanced.
- a filling material 25 indicated in the figure can have the shape of a strip of insulating material which is adapted to the width of the recess 24.
- the recess 24 can be filled with a hardening synthetic resin compound, to which mineral components are added.
- the filler or the filler piece it is not necessary for the filler or the filler piece to be completely non-conductive.
- the desired deflection of the current can already be achieved by a metal with an electrical conductivity that is significantly lower than that of the conductor piece 3, although not as completely as by a non-conductor.
- a fixed conductor piece 26 is used, the exception of which is tion is formed by a plurality of adjacent bores 27, between which narrow webs 28 are present and which start from a lower edge surface 29.
- the webs 28 between the recesses 27 act as an increased resistance and likewise cause the explained deflection of the current.
Landscapes
- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10144440A DE10144440C1 (de) | 2001-09-06 | 2001-09-06 | Schaltkontaktanordnung mit einer Einrichtung zur Verstärkung einer zwischen Schaltkontakten wirkenden Kontaktkraft |
DE10144440 | 2001-09-06 | ||
PCT/DE2002/003327 WO2003023800A1 (de) | 2001-09-06 | 2002-09-03 | Schaltkontaktanordnung mit einer einrichtung zur verstärkung einer zwischen schaltkontakten wirkenden kontaktkraft |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1423862A1 true EP1423862A1 (de) | 2004-06-02 |
EP1423862B1 EP1423862B1 (de) | 2008-11-19 |
Family
ID=7698439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02769933A Expired - Fee Related EP1423862B1 (de) | 2001-09-06 | 2002-09-03 | Schaltkontaktanordnung mit einer einrichtung zur verstärkung einer zwischen schaltkontakten wirkenden kontaktkraft |
Country Status (4)
Country | Link |
---|---|
US (1) | US7202427B2 (de) |
EP (1) | EP1423862B1 (de) |
DE (2) | DE10144440C1 (de) |
WO (1) | WO2003023800A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10144440C1 (de) * | 2001-09-06 | 2002-08-29 | Siemens Ag | Schaltkontaktanordnung mit einer Einrichtung zur Verstärkung einer zwischen Schaltkontakten wirkenden Kontaktkraft |
DE10346361B3 (de) * | 2003-09-30 | 2005-02-03 | Siemens Ag | Anschlussschienen-Anordnung für einen elektrischen Schalter und elektrischer Schalter mit einer Anschlussschienen-Anordnung |
WO2012017282A1 (en) * | 2010-07-31 | 2012-02-09 | Larsen & Toubro Limited | An improved contact arrangement for high fault current withstand in a low voltage switching device |
JP6074720B2 (ja) * | 2013-06-11 | 2017-02-08 | パナソニックIpマネジメント株式会社 | 電磁引外装置及び回路遮断器 |
US20160240329A1 (en) * | 2015-02-17 | 2016-08-18 | General Electric Company | Circuit breaker including current path geometries that increase contact popping level |
US10141125B2 (en) | 2015-04-13 | 2018-11-27 | Garrett Garcia | Contact for bus plug switches |
DE102019117802A1 (de) * | 2019-07-02 | 2021-01-07 | Johnson Electric Germany GmbH & Co. KG | Schaltkontaktsystem einer durch elektrischen Strom betriebenen Schalteinrichtung |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE398478C (de) * | 1922-11-07 | 1924-07-09 | Bbc Brown Boveri & Cie | Schalter fuer grosse Momentanstromstaerken |
DE478488C (de) * | 1926-08-21 | 1929-06-29 | Delle Atel Const Electr | Einrichtung an selbsttaetigen Ausschaltern und aehnlichen Apparaten mit Kontaktbruecke |
DE588293C (de) * | 1931-05-30 | 1933-11-20 | Aeg | Elektrischer Schalter oder Stromunterbrecher mit Klotzkontakten fuer Wechselstrom |
FR1080198A (fr) * | 1953-06-16 | 1954-12-07 | Merlin Gerin | Nouveaux dispositifs de contacts électriques |
CH470065A (de) * | 1966-11-16 | 1969-03-15 | Licentia Gmbh | Leistungsschalter, bei dem die Kontaktgabe durch zwei parallele Konstakstellen erfolgt |
US3459914A (en) * | 1967-09-27 | 1969-08-05 | Peritus Enkoping Ab | Contacts for the poles of electrical switchgear |
DE3432086A1 (de) * | 1984-08-28 | 1986-03-06 | Siemens AG, 1000 Berlin und 8000 München | Kontaktanordnung mit einer die kontaktkraft vergroessernden stromabhaengigen kraft |
US4931602A (en) * | 1987-05-28 | 1990-06-05 | Mitsubishi Denki Kabushiki Kaisha | Multipole circuit breaker |
FR2781921B1 (fr) * | 1998-07-29 | 2000-09-15 | Schneider Electric Ind Sa | Disjoncteur a tenue electrodynamique et pouvoir de coupure eleves |
DE10144440C1 (de) * | 2001-09-06 | 2002-08-29 | Siemens Ag | Schaltkontaktanordnung mit einer Einrichtung zur Verstärkung einer zwischen Schaltkontakten wirkenden Kontaktkraft |
-
2001
- 2001-09-06 DE DE10144440A patent/DE10144440C1/de not_active Expired - Fee Related
-
2002
- 2002-09-03 WO PCT/DE2002/003327 patent/WO2003023800A1/de active Application Filing
- 2002-09-03 EP EP02769933A patent/EP1423862B1/de not_active Expired - Fee Related
- 2002-09-03 US US10/488,784 patent/US7202427B2/en not_active Expired - Fee Related
- 2002-09-03 DE DE50213032T patent/DE50213032D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03023800A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1423862B1 (de) | 2008-11-19 |
DE10144440C1 (de) | 2002-08-29 |
US7202427B2 (en) | 2007-04-10 |
US20040239459A1 (en) | 2004-12-02 |
WO2003023800A1 (de) | 2003-03-20 |
DE50213032D1 (de) | 2009-01-02 |
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