EP0358286A2 - Ensemble conducteur articulé pour un levier de contact - Google Patents
Ensemble conducteur articulé pour un levier de contact Download PDFInfo
- Publication number
- EP0358286A2 EP0358286A2 EP89250026A EP89250026A EP0358286A2 EP 0358286 A2 EP0358286 A2 EP 0358286A2 EP 89250026 A EP89250026 A EP 89250026A EP 89250026 A EP89250026 A EP 89250026A EP 0358286 A2 EP0358286 A2 EP 0358286A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- sections
- lever
- connecting rail
- joint
- 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
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 239000004020 conductor Substances 0.000 abstract 1
- 230000001419 dependent effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
Images
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
- H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
-
- 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
- H01H1/5833—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal
- H01H2001/5838—Electric connections to or between contacts; Terminals comprising an articulating, sliding or rolling contact between movable contact and terminal using electrodynamic forces for enhancing the contact pressure between the sliding surfaces
-
- 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
Definitions
- the invention relates to a current-transmitting joint arrangement for connecting a stationary connecting rail with a pivotable contact lever and a joint region of the pivotable contact lever which is gripped by two sections of the connecting rail and penetrated by the pivot axis.
- a joint arrangement of this type is known, for example, from US-A-4 635 012. Further examples of pivotable hinge arrangements are shown in the following US-A-: 4 137 437, 4 166 205, 4 219 713, 4 264 796, 4 291 209, 4 635 012 and 4 524 339.
- US-A-4 635 012 describes the articulation arrangement of a circuit breaker, in which a connecting bar is forked through a longitudinal slot into two arms, which at their ends support arcuate receiving surfaces for a circular articulation area at the end of a pivotable contact lever.
- US-A-4 524 339 describes a blade contact assembly for a circuit breaker with a spring wound around each circular bearing point to provide a number of electrical contact points between each of the contact blades and the bearing.
- Joint arrangements of the type considered here are used in order to be able to use two parts which can be moved relative to one another and are used for carrying high currents without being connected by a flexible current band. Therefore, the main problem of the tapeless joint connections is the electrical resistance that is present in the space between the cooperating parts of the joint arrangement. This Resistance causes current-dependent heating, which can limit the usability of the joint arrangement. Proceeding from this, the invention has for its object to provide a current-transmitting joint arrangement of the type mentioned, which is characterized by low electrical contact resistance, low manufacturing costs and great reliability.
- the discrete contact areas can in particular be formed in that one of the sections of the fixed connecting rail has two contact surfaces which are at an angle to one another and the other of the sections has a flat contact surface. Furthermore, the sections of the fixed connecting rail can be arranged one on top of the other and, by means of at least one offset, two ends that can be moved relative to one another and that have the flat contact surfaces and have parallel current paths parts be formed. In this way, current-dependent forces can be made effective to increase the contact force, which flow between the parts through which the current flows in the same direction and are separated by a space.
- both parts of the fixed connecting rail are designed to be resilient, the spatial position of the pivot axis of the pivotable contact lever may not be sufficiently determined depending on the given cross section of the parts. This can be avoided in that the sections of the fixed connecting rail are designed with different cross sections, in such a way that one section is designed to be more flexible than the other section in relation to the articulated area of the pivotable contact lever.
- the articulated area of the pivotable contact lever can have an arcuate contour in the manner known per se.
- the contact lever is free of a torque caused by the joint arrangement.
- the effect of parallel current paths in the region of the fixed connecting rail can be used to increase the contact force within the joint arrangement. If this is not sufficient, a spring and a spring force can be applied between a crossbar coupled to the movable contact lever and a section of the connecting rail located on the same side of the contact lever as the crossbar, and the spring force on the section in the sense of an increase in the contact force between the Section and the contact lever transmitting pressure lever can be arranged. This ensures that the pressing force is increased when the contact lever is pivoted into its switched-on position.
- the pressure lever can expediently be designed as an angle lever and can be arranged in the region of its angling against a stationary bearing pin under the influence of the spring.
- one section of the connecting rail can be designed as a contact bridge and can be provided with an elongated hole running transversely to its longitudinal direction for receiving a stationary guide bolt, which also serves as a bearing bolt for the pressure lever.
- a stationary guide bolt which also serves as a bearing bolt for the pressure lever.
- FIG. 1 shows a side view of a live articulated connection.
- FIG. 2 shows a top view of the current-carrying joint connection according to FIG. 1.
- Figures 3, 4, 5, 6 and 7 show further embodiments of a current-carrying articulation in each case in a side view corresponding to Figure 1.
- a contact lever 18 is used to open and close switching contacts 10 and 12 a pivot axis 22 is movable.
- the contact lever 18 is connected to a stationary connecting rail 16 by means of a current-carrying joint arrangement designated as a whole by 14.
- the joint arrangement 14 comprises a joint region 20 which surrounds the pivot axis 22 and which has a circular contour.
- a fixed part 24 of the joint arrangement 14 interacts with the joint region 20 and is formed from a contacting end part 36 of an upper section 26 of the connecting rail 16 and a further contacting end part 34 of a lower section 28 of the fixed connecting rail 16.
- the contacting end part 36 of the section 26 is divided into contact fingers 30, which interact with the joint regions 20 of a corresponding number of contact levers 18.
- the end part 36 of the section 26 has a flat contact surface 32, while the end part 34 of the section 28 has two flat contact surfaces 38 which are at an angle to one another. This creates three discrete contact areas 40 between the articulated area 20 of the contact lever 18 and the end parts 34 and 36.
- the lower section 28 of the connecting bar 16 is designed with a larger cross section, ie a greater thickness, than the upper section 26.
- the resulting greater strength of the lower section 28 causes the pivot axis 22 to be maintained in the position shown when the contact lever 18 is loaded.
- the end part 36 of the upper section 26 is offset by an offset relative to the plane of the lower section 28 in such a way that a space is created and thus the end part 36 is resiliently movable relative to the end part 34.
- This arrangement enables an increase in the contact force between the flat contact surfaces 32 and 38 under the influence of the current flowing over the current path.
- the increase in contact force is due to the interaction of the partial currents indicated in the current paths A and B in FIG. 1 and the magnetic fields associated therewith.
- the sections 26 and 28 of the connecting bar 16 are of the same thickness.
- end parts 42 and 44 which are movable relative to one another are formed, each of which rests on the articulated region 20 of the contact lever 18 with three planar contact surfaces 32 which are at an angle to one another, each forming three discrete contact regions 40.
- the sections 26 and 28 of the connecting bar 16 are bent symmetrically, similarly to the example according to FIG. 3, with end parts 46 and contacting ends 48 which can be moved relative to one another.
- the ends 48 have two flat contact surfaces 50 which are approximately at a right angle to one another and which bear against the joint region 20 with a circular contour in the manner already described.
- the contact force between the parts of the joint arrangement 14 does not have any effect on the position of the contact lever 18, in the example according to FIG. 5 such a design is chosen that the contact force exerts a torque acting in the closing direction of the contact lever 61.
- the joint region 62 of the contact lever 61 surrounding the pivot axis 66 is designed such that flattened sides 64 are present on both sides of the contact regions 40. The radius of the joint region 62 with respect to the pivot axis 66 thus decreases on both sides of the contact regions 40. In this way, a torque acts on the contact lever 61 when it is rotated starting from the position shown in the switch-on direction and thereby moves the contact areas 40 out of the neutral position shown with respect to the pivot axis 60 will.
- the fixed part of the joint arrangement is adapted in a special way to the joint region 62 of the contact lever 61.
- an upper end part 56 of a section 52 of the fixed connecting rail 16 is formed with a flat contact surface 60.
- the end part 56 can be moved by an offset in the contact area 40 relative to a lower end part 58 of a lower section 54 of the connecting bar 16.
- the end part 58 has two flat contact surfaces 60 on two legs that are perpendicular to one another.
- the voltage of the tension spring 80 suspended on a crossbar 82 connecting the contact lever 18 depends on the position of the contact lever 18 relative to the fixed switching contact 12 in such a way that the voltage in the switched-on state, ie when the switching contacts 10 and 12 are touched, is greatest . In this way, the pressure force in the contact areas 40 is greatest in the switched-on position of the contact lever 18.
- the pressure lever 76 can also be designed to be resilient, for example as a leaf spring.
- one part of the fixed connecting rail 16 is designed as a contact bridge 72 which forms a contact area 92 on the lower end part 74 with a crowned end.
- the contact bridge 72 is secured against displacement in the longitudinal direction of the connecting bar 16 by a stationary bearing bolt 86 which is received in an elongated hole 88 of the contact bridge 72.
- the bearing pin 86 also serves as a pivot bearing for a likewise angled pressure lever 84 which, in the manner already described with reference to FIG. 6, is under the action of a tension spring 80.
- the pressure lever 84 acts with a nose on the contact bridge 72 in the area of its flat contact surface 90 and thus close to the contact area 40.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Mechanisms For Operating Contacts (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/242,233 US4926019A (en) | 1988-09-08 | 1988-09-08 | Moving copper pivot |
US242233 | 1988-09-08 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0358286A2 true EP0358286A2 (fr) | 1990-03-14 |
EP0358286A3 EP0358286A3 (fr) | 1991-01-02 |
EP0358286B1 EP0358286B1 (fr) | 1995-03-01 |
Family
ID=22913978
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89250026A Expired - Lifetime EP0358286B1 (fr) | 1988-09-08 | 1989-09-07 | Ensemble conducteur articulé pour un levier de contact |
Country Status (6)
Country | Link |
---|---|
US (1) | US4926019A (fr) |
EP (1) | EP0358286B1 (fr) |
JP (1) | JPH02117024A (fr) |
CA (1) | CA1334595C (fr) |
DE (1) | DE58909052D1 (fr) |
ES (1) | ES2069577T3 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998008240A1 (fr) * | 1996-08-21 | 1998-02-26 | Siemens Aktiengesellschaft | Systeme de contact mobile pour disjoncteur basse tension avec un palier pivotant |
EP0955658A2 (fr) * | 1998-05-07 | 1999-11-10 | Eaton Corporation | Appareil de commutation électrique avec un assemblage barre de contact améliorée |
EP1244123A1 (fr) * | 2001-03-23 | 2002-09-25 | Schneider Electric Industries SAS | Dispositif assurant le passage d'un courant éléctrique entre des bras conducteurs articulés |
EP2124238A1 (fr) * | 2008-05-22 | 2009-11-25 | Schneider Electric Industries SAS | Dispositif de contact pour contacteur de forte puissance résistive |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4416104C2 (de) * | 1994-04-19 | 2000-07-13 | Siemens Ag | Schaltkontaktanordnung eines elektrischen Leistungsschalters |
JP4395134B2 (ja) * | 2004-01-28 | 2010-01-06 | 三菱電機株式会社 | 遮断器 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3158720A (en) * | 1961-02-17 | 1964-11-24 | Fed Pacific Electric Co | Contact assembly having hinge means utilizing electrodynamic forces of current flow therethrough |
US3402274A (en) * | 1965-10-01 | 1968-09-17 | Square D Co | Contact structure for a power circuit breaker |
GB2033158A (en) * | 1978-10-16 | 1980-05-14 | Westinghouse Electric Corp | Circuit interrupter contact arm pivot |
US4554427A (en) * | 1983-12-19 | 1985-11-19 | Westinghouse Electric Corp. | Molded case circuit breaker with movable lower electrical contact |
US4635012A (en) * | 1984-08-10 | 1987-01-06 | Fuji Electric Co., Ltd. | Contactor structure of circuit breaker |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3215803A (en) * | 1962-12-31 | 1965-11-02 | Allis Chalmers Mfg Co | Contact structure for circuit breaker |
US3271533A (en) * | 1963-10-28 | 1966-09-06 | Kinetics Corp | Rotary switch, with vibration resistant resilient displaceable fixed contact structure |
DE1218593B (de) * | 1963-11-27 | 1966-06-08 | Walter Holzer | Flachkontaktstueck |
US3365561A (en) * | 1966-11-21 | 1968-01-23 | Gen Electric | Multiple finger type current-carrying contact arm pivot assembly |
GB1312156A (en) * | 1970-10-29 | 1973-04-04 | Dorman Smith Switchgear Ltd | Electrical circuit breakers and isolators |
US4264796A (en) * | 1976-12-30 | 1981-04-28 | Westinghouse Electric Corp. | Circuit breaker having improved movable contact |
US4219713A (en) * | 1976-12-30 | 1980-08-26 | Westinghouse Electric Corp. | Circuit breaker with high speed trip latch |
US4166205A (en) * | 1976-12-30 | 1979-08-28 | Westinghouse Electric Corp. | Stored energy circuit breaker |
US4137437A (en) * | 1977-06-03 | 1979-01-30 | Westinghouse Electric Corp. | Circuit breaker having improved movable crossbar and spring holder |
US4291209A (en) * | 1977-06-21 | 1981-09-22 | Westinghouse Electric Corp. | Circuit breaker having improved movable contact-drive mechanism interconnection |
CH631027A5 (de) * | 1978-06-30 | 1982-07-15 | Bbc Brown Boveri & Cie | Elektrische gleichstromkontaktvorrichtung. |
US4484164A (en) * | 1983-03-28 | 1984-11-20 | Siemens-Allis, Inc. | Braidless movable contact with wiping action |
US4524339A (en) * | 1983-05-09 | 1985-06-18 | Square D Company | Contact control arrangement for high amperage molded case circuit breaker |
US4598186A (en) * | 1983-05-09 | 1986-07-01 | Square D Company | Vent arrangement for high amperage molded case circuit breaker |
US4713504A (en) * | 1986-03-03 | 1987-12-15 | Westinghouse Electric Corp. | Circuit breaker with hinged arcing contact |
-
1988
- 1988-09-08 US US07/242,233 patent/US4926019A/en not_active Expired - Lifetime
-
1989
- 1989-09-04 JP JP1230261A patent/JPH02117024A/ja active Pending
- 1989-09-06 CA CA000610425A patent/CA1334595C/fr not_active Expired - Fee Related
- 1989-09-07 ES ES89250026T patent/ES2069577T3/es not_active Expired - Lifetime
- 1989-09-07 DE DE58909052T patent/DE58909052D1/de not_active Expired - Fee Related
- 1989-09-07 EP EP89250026A patent/EP0358286B1/fr not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3158720A (en) * | 1961-02-17 | 1964-11-24 | Fed Pacific Electric Co | Contact assembly having hinge means utilizing electrodynamic forces of current flow therethrough |
US3402274A (en) * | 1965-10-01 | 1968-09-17 | Square D Co | Contact structure for a power circuit breaker |
GB2033158A (en) * | 1978-10-16 | 1980-05-14 | Westinghouse Electric Corp | Circuit interrupter contact arm pivot |
US4554427A (en) * | 1983-12-19 | 1985-11-19 | Westinghouse Electric Corp. | Molded case circuit breaker with movable lower electrical contact |
US4635012A (en) * | 1984-08-10 | 1987-01-06 | Fuji Electric Co., Ltd. | Contactor structure of circuit breaker |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998008240A1 (fr) * | 1996-08-21 | 1998-02-26 | Siemens Aktiengesellschaft | Systeme de contact mobile pour disjoncteur basse tension avec un palier pivotant |
US6188031B1 (en) | 1996-08-21 | 2001-02-13 | Siemens Aktiengesellschaft | Movable contact arrangement for a low-voltage circuit breaker with a pivot bearing |
EP0955658A2 (fr) * | 1998-05-07 | 1999-11-10 | Eaton Corporation | Appareil de commutation électrique avec un assemblage barre de contact améliorée |
EP0955658A3 (fr) * | 1998-05-07 | 2000-08-23 | Eaton Corporation | Appareil de commutation électrique avec un assemblage barre de contact améliorée |
AU743224B2 (en) * | 1998-05-07 | 2002-01-24 | Eaton Corporation | Electrical switching apparatus with improved contact arm carrier arrangement |
EP1244123A1 (fr) * | 2001-03-23 | 2002-09-25 | Schneider Electric Industries SAS | Dispositif assurant le passage d'un courant éléctrique entre des bras conducteurs articulés |
FR2822588A1 (fr) * | 2001-03-23 | 2002-09-27 | Schneider Electric Ind Sa | Dispositif assurant le passage d'un courant electrique entre des bras conducteurs articules |
EP2124238A1 (fr) * | 2008-05-22 | 2009-11-25 | Schneider Electric Industries SAS | Dispositif de contact pour contacteur de forte puissance résistive |
FR2931583A1 (fr) * | 2008-05-22 | 2009-11-27 | Schneider Electric Ind Sas | Dispositif de contact pour contacteur de forte puissance resistive |
Also Published As
Publication number | Publication date |
---|---|
ES2069577T3 (es) | 1995-05-16 |
CA1334595C (fr) | 1995-02-28 |
EP0358286A3 (fr) | 1991-01-02 |
EP0358286B1 (fr) | 1995-03-01 |
DE58909052D1 (de) | 1995-04-06 |
US4926019A (en) | 1990-05-15 |
JPH02117024A (ja) | 1990-05-01 |
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