EP1420432A2 - Kontaktsystem für einen Niederspannungsschalter - Google Patents
Kontaktsystem für einen Niederspannungsschalter Download PDFInfo
- Publication number
- EP1420432A2 EP1420432A2 EP03023418A EP03023418A EP1420432A2 EP 1420432 A2 EP1420432 A2 EP 1420432A2 EP 03023418 A EP03023418 A EP 03023418A EP 03023418 A EP03023418 A EP 03023418A EP 1420432 A2 EP1420432 A2 EP 1420432A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- stop
- contact system
- piece
- elongated hole
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
- H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
- H01H77/10—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
- H01H77/102—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement
- H01H77/104—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening characterised by special mounting of contact arm, allowing blow-off movement with a stable blow-off position
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
-
- 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
- H01H1/225—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 the supporting member being pivotable
-
- 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
Definitions
- the invention relates to a contact system for a low-voltage switch, in particular for a circuit breaker.
- DE 39 01 852 A1 describes a contact system for a tilt-point bearing current limiting circuit breaker known with a dynamic in the event of a short circuit opening rotatable, first contact arm.
- This first contact arm will from a compression spring supported in the housing (contact force spring) via a pressure bolt applied.
- the contact arm continues to run Exceeding an unstable position in the upper part of the housing against a limiting element, in order to reach a safe OFF position in this second tilt position.
- the kinetic energy is primarily on the limiting element acting as a stop absorbed, causing the movement to stop.
- a generic contact system is known from DE 3411275 C2.
- a second There is a stop for the contact arm.
- This stop has a function in Connection with an enlarged bearing opening for an axis of rotation of the Contact arm provided pivot pin.
- the enlarged bearing opening in particular allows a change of position in the last phase of the contact closing process of the contact arm such that the movable contact on the fixed contact Grinding movement is carried out, thereby burning or welding the contacts is prevented.
- a second stop is therefore provided, to a certain extent a single stop is upstream and during the movement of the contact piece by the electrodynamic Opening force can occur after hitting the first stop of the contact force spring absorbs kinetic energy.
- the switching element Since the contact piece is floating, the excess energy still present causes the further rotation of the contact piece around the pivot point of the time previously hit attack.
- the switching element performs a translatory movement in the slot, combined with the compression of the compression spring. Then it comes to Touch and to hit the other arm section on the other stop in the housing or in a housing part, with a last remnant of kinetic energy is consumed.
- both stops are reached one after the other.
- the additionally introduced stop is preferably present with respect to the angular path a commonly used single stop, or one as in the US 5 258 733 double stop used.
- the selector shaft and its bearing also have a residual amount of deformation energy take up.
- the length of the elongated hole can be chosen so that after Touching the second stop and then continuing rotation of the bearing pin stops at the end of the slot before the first stop is reached. When it hits the end of the elongated hole, the selector shaft and its bearing are loaded and energy is dissipated in the selector shaft and in its bearing.
- the two arm sections should preferably not be punctiform.
- the areas of the two arm sections can, however, be chosen to be small.
- the dimension the contact piece (especially its thickness) need not be changed or be adjusted; it can be in the invention on widenings and extensions the surfaces of the two stops and the two arm sections.
- the material selection for the stop should preferably be aimed at impact-resistant Plastics are directed, the specialist suitable suitable marketable materials be available.
- the housing can preferably consist of several chambers be formed, with an upper chamber the first stop and a lower Chamber contains the second stop.
- the chambers are designed so that they form a modularity with the other parts of the contact system and the housing, which help simplify manufacture and assembly, and Extensions to contact system with other service areas in a simple way allow.
- the switching piece can be designed with one or two arms. One at a time These two designs can be the point of attack and the direction of attack of the contact force spring be set up for the special case.
- the contact force spring can be used as Act tension or compression spring.
- each of the two switch sections on the contact pad supporting arm of the contact piece may be arranged. In this case it becomes a one-armed Contact piece used.
- the switching piece can also be designed with two arms, in which case each arm of the contact piece, a contact piece section is arranged.
- each arm of the contact piece a contact piece section is arranged.
- the arm of the contact piece carrying the contact pad be longer than the non-contact arm of the contact.
- Fig. 1 the contact system of a low-voltage circuit breaker with a tipping point, two-armed contact piece when hitting the second stop 34 shown during the opening movement. 2 is the impact on the first stop 24 and the still existing contact on the second stop 34 detect.
- Fig. 3 shows three contact systems arranged in parallel, over the switching shaft are connected. This is a preferred embodiment in which the The contact piece is mounted eccentrically in or on the selector shaft. As alternative is claimed - but not shown in the figures that the switching piece is stored via an elongated hole in the housing or in a housing part. The in the invention The dynamic relationships mentioned are the same in both arrangements. The main point is that during the opening movement of the contact the elongated hole remains stationary.
- the contact's current path is not shown.
- the current track is through the simply interrupting contact piece (as a rotary contact) is opened and closed.
- the switching piece 10 is about the axis of rotation between its closed and open position rotatably.
- the contact piece has a longer 18 and a shorter one Arm 20.
- the longer arm 18 contributes to a contact pad, not shown Contacting the permanent contact.
- On the shorter arm 20 there is a section 32 (a stop lug) formed, which corresponds to a stop 34 in the housing.
- the contact of the switching element 10 is floating in an elongated hole 27 a bearing pin 15, which has coaxially directed to the side of the contact piece pivot.
- the bearing pin forms the axis of rotation during the opening movement.
- bearing pin and shift shaft are parallel to each other. 1 is tilt-point-mounted. Depending on the rotational position with regard to the dead center of the bearing, this jumps Contact piece supported by the force of the contact force spring in the open or in the Closed position. Holding and guiding the contact piece 10 is done by the Contact force spring 40.
- the contact force spring 40 is at one end on a counter bearing 52 fixed in the housing 100.
- the contact force spring loads via a spring plunger 42 the switching piece 10 at a bearing 17 in the direction of the bearing point in the housing.
- the bearing point 17 is designed as a semicircular groove.
- Section 32 strikes after opening the contact system before any other contact of the switching arm with housing parts on the second Stop 34 on.
- the contact of the first section 22 with the first stop 24 takes place later. Both sections are preferably flat and not punctiform.
- the contact surface is of the first section 22 and the associated area of the stop 24 is greater than the contact surface and stop surface 34 of the second section 32.
- the floating mounting of the contact and the longitudinal extension of the elongated hole 27 in the contact piece is such that the longitudinal extent of the elongated hole is parallel the main component of the movement B2 of the contact is while the fulcrum is located in the stop 34 that met first in time.
- the switching piece can move translationally in the slot, the contact force spring 40 a undergoes further compression (and thus spring work).
- Reference number 36 denotes a first contact surface, which is a mechanical one Load zone of the switching element, the selector shaft and its bearing.
- the mechanical load occurs due to the rotary movement B2 around the through the second stop 34 given pivot point.
- the rotation B2 is unobstructed as long as until the bearing pin 15 stops at the end of the slot when the length of the Slotted hole is selected accordingly short.
- the contact force spring 40 and their counter bearing 52 loaded, causing kinetic energy in the contact force spring and is consumed in the warehouse.
- the selector shaft and its bearing After hitting the end of the elongated hole, the selector shaft and its bearing are loaded; Energy is dissipated in the control shaft and in its bearing.
- the resulting one second contact surface (here a second mechanical load zone) is with the already mentioned reference number 36 '.
- FIG. 3 shows three contact systems, with bearing housing 52 for the contact force spring 40 and the switching shaft 60. Above the switching piece 10, the bearing pin 15 can be seen, both ends of which form the trunnions. The contact piece is over the Bearing pin mounted eccentrically to the shift shaft axis in the shift shaft 60.
- the warehouse in the middle bearing block 64 consists of one that cannot be seen in the figure Long hole.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Keying Circuit Devices (AREA)
- Electronic Switches (AREA)
Abstract
Description
- beide Anschläge haben in Bezug auf die Öffnungsbewegung eine solche Winkelstellung zueinander, dass der zweite Abschnitt nach kürzerem Winkelweg als der erste Abschnitt auf den zweiten Anschlag trifft;
- die schwimmende Lagerung erfolgt derart, dass am Schaltstück ein Lagerstift angeordnet ist, der spielbehaftet und zumindest während des dynamischen Öffnens unverschieblich in einem Langloch gelagert ist;
- die Längserstreckung des Langlochs liegt parallel oder nahezu parallel zur Wirkrichtung der Kontaktkraftfeder;
- die Länge des Langlochs erlaubt eine Drehung des Schaltstücks um einen im zweiten Anschlag liegenden Drehpunkt und
- während der Drehung leistet die Kontaktkraftfeder Federarbeit (Kompressions- oder Dilatationsarbeit, je nach Wirkprinzip der Kontaktkraftfeder).
- Kontaktsystem wirkverbunden mit einem Schaltschloss, womit ein Unterbrechen des Stromflusses erfolgt, so dass auch nach Wieder-Schließen des Kontakts infolge der sinkenden Stromstärke kein erneuter Öffnungsvorgang eingeleitet wird.
- Kontaktsystem mit einem Kippsprungwerk, wobei das Schaltstück kipp-punkt-gelagert ist. Die Kontaktkraftfeder greift derart am Schaltstück an, dass sie infolge der durch hohe Überströme erzeugten elektrodynamischen Kraft den Kippsprung vermittelt; sie stellt beim Überschreiten des Kipp-Punkts die Öffnungsstellung sicher. Die vorzugsweise druckbeanspruchte Kontaktkraftfeder greift zwischen Gehäuse und Schaltstück an, wobei sich die Drehachse des Schaltstücks bei einer instabilen Zwischenstellung des Schaltstücks in gerader Linie mit der Wirkrichtung der Kontaktkraftfeder befindet.
- 10
- Schaltstück
- 15
- Lagerstift mit Drehzapfen
- 17
- Ausnehmung
- 18
- langer Hebelarm
- 20
- kurzer Hebelarm
- 22
- erster Abschnitt
- 24
- erster Anschlag
- 27
- Lagerstelle, Langloch
- 32
- zweiter Abschnitt
- 34
- zweiter Anschlag
- 36
- Belastungszone
- 40
- Kontaktkraftfeder
- 42
- Federstößel
- 52
- Federlager
- 60
- Schaltwelle
- 64
- Lagerblock
- 70
- Löschkammer
- 100
- Gehäuse
- 102
- obere Kammer
- 104
- untere Kammer
- B1
- Öffnungsbewegung
- B2
- Translation
Claims (10)
- Kontaktsystem für einen Niederspannungsschalter, insbesondere Leistungsschalter, mit elektrodynamisch veranlasster Öffnungskraft, mit einem für jeden Pol in einem Schaltergehäuse (100) schwimmend gelagerten Schaltstück (10) mit einer Kontaktauflage und einem Festkontakt mit zugehöriger festen Kontaktauflage,mit einer am Schaltstück angreifenden Kontaktkraftfeder (40),mit einem im Schaltergehäuse (100) angeordneten ersten Anschlag (24) für den Aufschlag eines ersten Schaltstückabschnitts (22) am Ende der Öffnungsbewegung (B1) des Schaltstücks (10),wobei im Schaltergehäuse (100) des Kontaktsystems ein zweiter Anschlag (34) ausgebildet ist, der einem zweiten Abschnitt (32) des Schaltstücks (10) für den Aufschlag des zweiten Abschnitts (32) zugeordnet ist,wobei der zweite Anschlag (34) gegenüber dem ersten Anschlag (24) eine solche Winkelstellung hat, dass der zweite Abschnitt (32) nach kürzerem Winkelweg in der Öffnungsbewegung auf den zweiten Anschlag (34) trifft als der erste Abschnitt (22) auf den ersten Anschlag (24);dass die schwimmende Lagerung derart erfolgt, dass am Schaltstück (10) ein Lagerstift (15) angeordnet ist, der spielbehaftet und zumindest während des dynamischen Öffnens unverschieblich in einem Langloch (27) gelagert ist,dass die Längserstreckung des Langlochs (27) parallel oder nahezu parallel zur Wirkrichtung der Kontaktkraftfeder (40) liegt, wobei die Längserstreckung des Langlochs (27) eine Drehung (B2) des Schaltstücks (10) nach Auftreffen auf den zweiten Anschlag (34) um einen im zweiten Anschlag (34) liegenden Drehpunkt erlaubt unddass während der Drehung (B2) die Kontaktkraftfeder (40) Federarbeit leistet.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Länge des Langlochs (27) so bemessen ist, dass während der Drehung (B2) des Schaltstücks (10) nach Auftreffen auf den zweiten Anschlag (34) der Lagerstift (15) noch vor Auftreffen des ersten Abschnitts (22) auf den ersten Anschlag (24) das Ende (36') des Langlochs (27) erreicht und in der Lagerwelle bzw. in derem Lager Verformungsarbeit geleistet wird.
- Kontaktsystem nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Lagerstift (15) zu beiden Seiten des Schaltstücks in ein Langloch (27) greift.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Langloch-Lager (27) im Gehäuse oder in einem Gehäuseteil angeordnet ist.
- Kontaktsystem nach einem der Ansprüche 1, 2 oder 3, dadurch gekennzeichnet, dass das Langloch-Lager (27) exzentrisch an der Schaltwelle des Kontaktsystems angeordnet ist.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schaltstück (10) zweiarmig ausgebildet und dass an jedem Arm des Schaltstücks (10) ein Schaltstückabschnitt (22, 32) angeordnet ist.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens ein Anschlag (24, 34) in je einer Gehäuse-Teilkammer (102, 104) aus schlagfestem Kunststoff ausgebildet ist.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Angriffspunkt der Kontaktkraftfeder (40) als Ausnehmung (17) im Schaltstück (10) ausgebildet ist.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Kontaktsystem mit einem Schaltschloss wirkverbunden ist.
- Kontaktsystem nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Schaltstück (10) kipp-punkt-gelagert ist und die Kontaktkraftfeder (40) derart am Schaltstück (10) angreift, dass sie einen Kippsprung vermittelt
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10252741A DE10252741B3 (de) | 2002-11-13 | 2002-11-13 | Kontaktsystem für einen Niederspannungsschalter |
DE10252741 | 2002-11-13 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1420432A2 true EP1420432A2 (de) | 2004-05-19 |
EP1420432A3 EP1420432A3 (de) | 2004-09-08 |
EP1420432B1 EP1420432B1 (de) | 2007-11-28 |
Family
ID=30775615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03023418A Expired - Lifetime EP1420432B1 (de) | 2002-11-13 | 2003-10-17 | Kontaktsystem für einen Niederspannungsschalter |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1420432B1 (de) |
AT (1) | ATE379844T1 (de) |
DE (2) | DE10252741B3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102376497A (zh) * | 2010-08-23 | 2012-03-14 | 上海电科电器科技有限公司 | 塑壳断路器分片式触头结构 |
CN108597921A (zh) * | 2018-06-08 | 2018-09-28 | 苏州华之杰电讯股份有限公司 | 一种使用触头组机构的开关 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007003674B3 (de) * | 2007-01-18 | 2008-11-06 | Moeller Gmbh | Lagerungseinrichtung zur Aufnahme einer Lagerachse |
WO2011097612A1 (en) * | 2010-02-08 | 2011-08-11 | Siemens Aktiengesellschaft | Circuit breaker electrical contact assembly, and systems and methods using same |
DE102011003131A1 (de) | 2011-01-25 | 2012-07-26 | Siemens Aktiengesellschaft | Elektrischer Schalter |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3411275A1 (de) * | 1983-03-28 | 1984-10-04 | Siemens-Allis, Inc., Atlanta, Ga. | Leistungsschalter |
US5258733A (en) * | 1992-08-06 | 1993-11-02 | Eaton Corporation | Molded case circuit breaker having improved trip unit |
EP0889498A2 (de) * | 1997-07-02 | 1999-01-07 | AEG Niederspannungstechnik GmbH & Co. KG | Drehkontaktanordnung für Hochstromschalter |
EP0903763A2 (de) * | 1997-09-23 | 1999-03-24 | Siemens Energy & Automation, Inc. | Schutzschalter mit eine elektrodynamisch öffnung unterstutzende Nockenstruktur |
US6259048B1 (en) * | 1998-05-29 | 2001-07-10 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3901852A1 (de) * | 1989-01-23 | 1990-07-26 | Kloeckner Moeller Elektrizit | Kontaktsystem fuer strombegrenzende leistungsschalter |
-
2002
- 2002-11-13 DE DE10252741A patent/DE10252741B3/de not_active Expired - Fee Related
-
2003
- 2003-10-17 DE DE50308679T patent/DE50308679D1/de not_active Expired - Fee Related
- 2003-10-17 AT AT03023418T patent/ATE379844T1/de not_active IP Right Cessation
- 2003-10-17 EP EP03023418A patent/EP1420432B1/de not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3411275A1 (de) * | 1983-03-28 | 1984-10-04 | Siemens-Allis, Inc., Atlanta, Ga. | Leistungsschalter |
US5258733A (en) * | 1992-08-06 | 1993-11-02 | Eaton Corporation | Molded case circuit breaker having improved trip unit |
EP0889498A2 (de) * | 1997-07-02 | 1999-01-07 | AEG Niederspannungstechnik GmbH & Co. KG | Drehkontaktanordnung für Hochstromschalter |
EP0903763A2 (de) * | 1997-09-23 | 1999-03-24 | Siemens Energy & Automation, Inc. | Schutzschalter mit eine elektrodynamisch öffnung unterstutzende Nockenstruktur |
US6259048B1 (en) * | 1998-05-29 | 2001-07-10 | General Electric Company | Rotary contact assembly for high ampere-rated circuit breakers |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102376497A (zh) * | 2010-08-23 | 2012-03-14 | 上海电科电器科技有限公司 | 塑壳断路器分片式触头结构 |
CN108597921A (zh) * | 2018-06-08 | 2018-09-28 | 苏州华之杰电讯股份有限公司 | 一种使用触头组机构的开关 |
CN108597921B (zh) * | 2018-06-08 | 2023-11-14 | 苏州华之杰电讯股份有限公司 | 一种使用触头组机构的开关 |
Also Published As
Publication number | Publication date |
---|---|
ATE379844T1 (de) | 2007-12-15 |
EP1420432B1 (de) | 2007-11-28 |
EP1420432A3 (de) | 2004-09-08 |
DE10252741B3 (de) | 2004-02-26 |
DE50308679D1 (de) | 2008-01-10 |
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