EP0910858A1 - Schaltkontaktanordnung mit einer gelenkanordnung für einen kontakthebel - Google Patents
Schaltkontaktanordnung mit einer gelenkanordnung für einen kontakthebelInfo
- Publication number
- EP0910858A1 EP0910858A1 EP97933631A EP97933631A EP0910858A1 EP 0910858 A1 EP0910858 A1 EP 0910858A1 EP 97933631 A EP97933631 A EP 97933631A EP 97933631 A EP97933631 A EP 97933631A EP 0910858 A1 EP0910858 A1 EP 0910858A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- contact lever
- lever
- arrangement
- switching
- 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
- 238000005096 rolling process Methods 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
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
- H01H1/12—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
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
-
- 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
- H01H2001/228—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 with insulating spacers between the 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
- H01H2009/305—Means for extinguishing or preventing arc between current-carrying parts including means for screening for arc gases as protection of mechanism against hot arc gases or for keeping arc gases in the arc chamber
Definitions
- the invention relates to a switching contact arrangement of a low-voltage circuit breaker with a contact lever carrier and with at least one contact lever which is arranged movably relative to the contact lever by means of a joint arrangement and is biased by at least one spring in the direction of a fixed switching contact, and with at least one the contact lever with a stationary connecting rail connecting flexible conductor.
- a switch contact arrangement with this feature has become known from DE 44 16 105 Cl.
- the hinge arrangement is formed by a bearing bolt passing through the contact lever. Since the contact levers are made of copper with a given cross-section in consideration of the lowest possible heating during operation, the bearing opening in the contact lever requires such a dimensioning that a sufficient lifespan of the joint arrangement is achieved despite the relatively soft material of the contact lever.
- the bearing opening reduces the cross-section of the contact lever at a mechanically highly stressed point and also reduces the current-carrying cross-section of the contact lever. This entails the risk of increased local heating, which can only be compensated for by an enlarged cross section of the contact lever.
- the object of the invention is to create a switch contact arrangement with a long service life for the joint arrangement of the contact lever without additional material expenditure.
- this object is achieved in that the joint arrangement by a rolling surface arranged on the contact lever and a cooperating with it, on the Contact lever carrier arranged support surface is formed and that a holding device detecting the contact lever is attached to the contact lever carrier to secure against displacement of the contact lever parallel to the support surface.
- the new joint arrangement makes the previous bearing openings of the contact levers unnecessary. As a result, a larger cross section is available, which is favorable for the mechanical strength and the electrical properties of the contact lever.
- the rolling surface can be dimensioned without difficulty so that a lower specific stress than in the previous bearing opening occurs. Therefore, a reduction in the hardness of the copper used to manufacture the contact lever due to the supply of heat when soldering or welding the flexible conductors is less critical than before.
- the new joint arrangement can be implemented with surprisingly few changes to existing switch contact arrangements. This can be done in that the rolling surface arranged opposite the contact lever on its contacting side has a negative curvature and the supporting surface located on the contact lever carrier has a positive curvature, the radius of curvature of the rolling surface being larger than the radius of curvature of the supporting surface.
- the mentioned holding device for the contact lever can also be realized with advantageously simple means.
- the holding device can use the contact lever have on its contacting side in a region opposite the rolling surface overlapping, articulated on the contact lever support brackets, the contact lever having a retaining tab to be overlapped by the retaining bracket.
- Such a retaining bracket can at the same time be formed as a spacer for several adjacent contact levers by integrally formed webs.
- the contact lever carriers of switch contact arrangements of the present type can consist of both metal and plastic. If contact lever carriers made of plastic are to have particularly resistant contact surfaces for the contact lever, it is advisable to provide the contact surfaces with a metal plate.
- Figure l shows schematically a low-voltage power switch in section.
- FIG. 2 the movable part of a switch contact arrangement is partially shown in section.
- FIG. 3 shows a section III-III in FIG. 2 to illustrate details of a holding bracket.
- FIG. 4 shows an enlarged area of a contact lever with adjoining parts.
- the low-voltage circuit breaker 1 shown schematically in section in FIG. 1 has a housing 2 in which, depending on the number of poles required, a switch contact system 3 or more such switch contact systems are arranged in parallel with one another.
- Each switch contact system 3 has an upper connecting rail 4 with a fixed switch contact 5 attached to it and a movable switch contact 6.
- the movable switch contact 6 represents an assembly which comprises a movable contact lever carrier 7 and at least one contact lever 10 pivotally mounted thereon.
- Flexible conductors 11 connect the contact lever (s) 10 to a lower connecting rail 12.
- Above the switch contact system 3 there is an arc extinguishing chamber 13 for extinguishing the switching arc which arises when the switch contact arrangement 3 is opened.
- the contact lever carrier 7 can be actuated by a drive device 14 which has a switching shaft 15 which is common to all adjacent poles of the circuit breaker 1 and which is connected to the contact lever carriers 7 of the individual poles by a coupling linkage 16.
- the contact lever carrier 7 consists of a pole insulating body 17 made of insulating plastic to be connected to the coupling linkage 16 and side walls 20 made of sheet metal attached to the pole insulating body 17 on both sides.
- the contact lever 10 shown is provided with a contact pad 21 on its contacting side 18 facing the fixed switching contact 5.
- On its side opposite the contacting side 18 The rear side of the contact lever 10 has a rolling surface 22, which rests on a bearing surface 23 of the pole insulating body 17. As shown, the rolling surface 22 is designed with a negative curvature, while the bearing surface 23 has a positive curvature, namely with a smaller radius of curvature.
- the contact lever 10 can therefore be pivoted relative to the insulating body 17 in the direction of an arrow 25 against the action of two contact force springs 24 arranged in parallel.
- a contact force of the desired magnitude arises between the contact support 21 and the fixed switch contact 5 when the movable switch contact 6 is actuated by the drive device 14 about a pivot bearing 26 indicated in FIG.
- a holding bracket 27 engages over the contact lever 10 and thereby maintains contact between the rolling surface 22 and the support surface 23.
- the holding bracket 27 ensures that the contact lever 10 cannot be moved parallel to the bearing surface 23.
- a plurality of contact levers 10 can be arranged parallel to one another in each pole of the circuit breaker 1.
- five parallel contact levers 10 are shown in section as an example.
- the holding bracket 27 is common to all contact levers 10 and has integrally formed separating webs 30 which act as spacers for the adjacent contact levers 10. With external pins 31, the holding bracket 27 engages in bearing openings 32 in the side walls 20 of the contact lever carrier 17. Therefore, the bracket 27 can participate in the pivoting movement of the contact lever 10 relative to the Polisolierk ⁇ rper 17.
- Figure 3 is also a fixed with the side Walls 20 connected insulating shield 33 shown that shields the area of the movable switching contact 6 located below the contact pads 21 against the influence of arcing gases (see. DE 295 03 327 Ul).
- the contact levers 10 are each provided on their contacting side 18 with a retaining lug 34 opposite the rolling surface 22, which are overlapped by the retaining bracket 27 with a U-shaped cross section.
- a further embodiment is shown in FIG. 4 as a metal plate 35 which is embedded in the material of the pole insulating body 17 in order to increase the service life of the support surface 23.
- the radius of curvature of the rolling surface 22 and the associated support surface 23 can be dimensioned much larger than is possible in a joint arrangement with a bearing pin passing through the contact lever.
- the contact surface between the surfaces mentioned is relatively large. This results in an advantageously low specific stress on the interacting parts. Heating the contact lever 10 when the flexible conductor 11 is attached (FIG. 1 and FIG. 2) therefore has a less detrimental effect on the life of the joint arrangement than in the case of previously used switch contact arrangements.
- the full cross section is available for the current transmission.
Landscapes
- Breakers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19629482 | 1996-07-12 | ||
DE19629482A DE19629482C1 (de) | 1996-07-12 | 1996-07-12 | Schaltkontaktanordnung mit einer Gelenkanordnung für einen Kontakthebel |
PCT/DE1997/001472 WO1998002892A1 (de) | 1996-07-12 | 1997-07-09 | Schaltkontaktanordnung mit einer gelenkanordnung für einen kontakthebel |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0910858A1 true EP0910858A1 (de) | 1999-04-28 |
EP0910858B1 EP0910858B1 (de) | 2000-09-27 |
Family
ID=7800468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97933631A Expired - Lifetime EP0910858B1 (de) | 1996-07-12 | 1997-07-09 | Schaltkontaktanordnung mit einer gelenkanordnung für einen kontakthebel |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0910858B1 (de) |
DE (2) | DE19629482C1 (de) |
WO (1) | WO1998002892A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10149020C1 (de) * | 2001-09-28 | 2003-01-16 | Siemens Ag | Kontaktanordnung für Niederspannungs-Schaltgeräte |
DE10148947C1 (de) * | 2001-09-28 | 2003-02-13 | Siemens Ag | Schaltkontaktanordnung eines Niederspannungs-Leistungsschalters |
DE102014107630B4 (de) * | 2014-05-30 | 2020-01-30 | Eaton Intelligent Power Limited | Schutzschalter mit verbesserter Isolation der Schaltwelle |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3679291D1 (de) * | 1985-10-31 | 1991-06-20 | Merlin Gerin | Kinematische uebertragungskette zwischen dem steuermechanismus und den polen eines elektrischen lastschalters mit einem gespritzten isoliergehaeuse. |
US5093988A (en) * | 1991-01-24 | 1992-03-10 | Kohler Co. | Method for attaching a flexible connector |
DE4416105C1 (de) * | 1994-04-19 | 1995-05-24 | Siemens Ag | Niederspannungs-Leistungsschalter mit einer Schaltkammer |
DE4416104C2 (de) * | 1994-04-19 | 2000-07-13 | Siemens Ag | Schaltkontaktanordnung eines elektrischen Leistungsschalters |
DE29503327U1 (de) * | 1995-02-16 | 1995-04-13 | Siemens AG, 80333 München | Kontakthebelbaugruppe für einen Niederspannungs-Leistungsschalter |
-
1996
- 1996-07-12 DE DE19629482A patent/DE19629482C1/de not_active Expired - Fee Related
-
1997
- 1997-07-09 DE DE59702407T patent/DE59702407D1/de not_active Expired - Fee Related
- 1997-07-09 EP EP97933631A patent/EP0910858B1/de not_active Expired - Lifetime
- 1997-07-09 WO PCT/DE1997/001472 patent/WO1998002892A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9802892A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE59702407D1 (de) | 2000-11-02 |
DE19629482C1 (de) | 1997-09-11 |
EP0910858B1 (de) | 2000-09-27 |
WO1998002892A1 (de) | 1998-01-22 |
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