EP2453528A1 - Electrical contact element between a first and a second contact part - Google Patents

Electrical contact element between a first and a second contact part Download PDF

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Publication number
EP2453528A1
EP2453528A1 EP10014523A EP10014523A EP2453528A1 EP 2453528 A1 EP2453528 A1 EP 2453528A1 EP 10014523 A EP10014523 A EP 10014523A EP 10014523 A EP10014523 A EP 10014523A EP 2453528 A1 EP2453528 A1 EP 2453528A1
Authority
EP
European Patent Office
Prior art keywords
contact element
spring
electrical contact
meander
element according
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.)
Withdrawn
Application number
EP10014523A
Other languages
German (de)
French (fr)
Inventor
Maik Dr.-Ing. Hyrenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Technology AG
Original Assignee
ABB Technology AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ABB Technology AG filed Critical ABB Technology AG
Priority to EP10014523A priority Critical patent/EP2453528A1/en
Publication of EP2453528A1 publication Critical patent/EP2453528A1/en
Withdrawn legal-status Critical Current

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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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/38—Plug-and-socket contacts
    • 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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/44—Contacts characterised by the manner in which co-operating contacts engage by sliding with resilient mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure
    • H01R13/18—Pins, blades or sockets having separate spring member for producing or increasing contact pressure with the spring member surrounding the socket

Definitions

  • the invention concerns to an electrical contact element between a first and a second contact part.
  • contacting springs are known in form of spiral rings,or a belt of current carrying copper contact elements in combination with a steel spring.
  • the contact element is a spring in form of a meander, by which the meander follows in its parallel sections a v-formed path in a plane A, and a further v-shape in the plane B which is at least approximately orthogonal to plane A.
  • This causes in result, that the resilience of the spring is generated by a three-dimensional torsion. This is highly different to a resilience which is caused or effected by only a one- or two-dimensional elongation.
  • a spring is a flat construction, because of its second v-shape in the third cartesial dimension. Its important advantage is given by the use for busbar-connection, because its possible to arrange the contact element between the two tubeformed parts without a necessity of the arrangement of groove in at least one of the these contacting parts, or it is only need a very flat groove.
  • first and second contact part are the inner and outer part of a disconnecter-, grounding- or threeposition-switch in medium or high voltage switchgears.
  • first and second contact part are the inner and outer part of a moveable contact of vacuum circuitbreaker in medium or high voltage switchgears.
  • this spring construction is advantageous too.
  • the spring meander of the contact element is following or formed as a closed ring spring arrangement.
  • the contact element is made of copper-zirconium, or of copper-beryllium.
  • the spring meander of the contact element can be made out of a round profile.
  • the spring meander of the contact element can also be made of a flat cutted or stamped profile which is mechanically transformed into a round profile by milling. This is easy to manufacture, but has the same technical feature of the resulting spring.
  • FIG. 1 An advantageous embodiment of the invention is shown in figure 1
  • a spring with a meander shape (see figure 1 ), which is bend in an angle in the center line, is formed, e.g. as endless belt.
  • a spring with a meander shape (see figure 1 ), which is bend in an angle in the center line, is formed, e.g. as endless belt.
  • the cutted ends C and D it can be welded to a ring to be used in cylindrical contacts.
  • the groove to take the spring is of simple rectangular shape and therefore easy to produce.
  • the depth is a little deeper then the thickness of the wire of the spring. This saves material and machining time. Due to the spring force in the direction A, the spring can be placed on the inner or the outer cylinder.
  • the bending in the center line is defining the height of the spring and the contact force.
  • the flexibility of this contact spring is given by the fact, that the spring follows a 3-dimensional meander structure. So the forces which are introduced from Part 2 to Part 3 causes a resulting torsion of the spring material itself.
  • the contact spring is located at the ends on this busbar, which will be pushed into tube-formed contacts on both sides of the busbar.

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Abstract

The invention concerns to an electrical contact element between a first and a second contact part. In order to optimize the electrial contact, the contact element is a spring in form of a meander, by which the meander follows in its parallel sections a v-formed path in a plane A, and a further v-shape in the plane B which is at least approximately orthogonal to plane A.

Description

  • The invention concerns to an electrical contact element between a first and a second contact part.
  • For contacting especially busbars in medium voltage switchgears, contacting springs are known in form of spiral rings,or a belt of current carrying copper contact elements in combination with a steel spring.
  • The disadvantages are different, depending on the solutions above.
    1. a) The groove for the spiral contact is quite complex in shape and requires thick material as it is comparable deep. The connection requires more space and material.
    2. b) As the belt is not a closed ring and therefore has no spring force, it needs a special groove to be fixed. It requires high accuracy in manufacturing. The costs for the contacts are high, as it is an assembly of the steel spring as a belt and single contacts for each contact point.
    3. c) The mechanical tolerance of a contact system using the belt system is limited.
  • It is the object of the invention, to optimize electrical contact by the use of an elastic contact element, so that also an easy an effective electrical interconnection at least in the use in medium and high voltage switchgears is given.
  • The basical idea of this invention is, that the contact element is a spring in form of a meander, by which the meander follows in its parallel sections a v-formed path in a plane A, and a further v-shape in the plane B which is at least approximately orthogonal to plane A. This causes in result, that the resilience of the spring is generated by a three-dimensional torsion. This is highly different to a resilience which is caused or effected by only a one- or two-dimensional elongation.
  • To form an electrical contacting element in the way of the invention, it is possible to introduce high reset forces into the spring which generates a very close and effective electric contacting between the aforesaid two contact parts.
  • Further advantages are that a spring is a flat construction, because of its second v-shape in the third cartesial dimension. Its important advantage is given by the use for busbar-connection, because its possible to arrange the contact element between the two tubeformed parts without a necessity of the arrangement of groove in at least one of the these contacting parts, or it is only need a very flat groove.
  • A further advantageous feature is, that the first and second contact part are the inner and outer part of a disconnecter-, grounding- or threeposition-switch in medium or high voltage switchgears.
  • Furthermore is described, that the first and second contact part are the inner and outer part of a moveable contact of vacuum circuitbreaker in medium or high voltage switchgears. For this this spring construction is advantageous too.
  • The spring meander of the contact element is following or formed as a closed ring spring arrangement.
  • Furthermore the contact element is made of copper-zirconium, or of copper-beryllium.
  • The spring meander of the contact element can be made out of a round profile.
  • Alternatively the spring meander of the contact element can also be made of a flat cutted or stamped profile which is mechanically transformed into a round profile by milling. This is easy to manufacture, but has the same technical feature of the resulting spring.
  • An advantageous embodiment of the invention is shown in figure 1
  • Out of a spring wire a spring with a meander shape (see figure 1), which is bend in an angle in the center line, is formed, e.g. as endless belt. At the cutted ends C and D it can be welded to a ring to be used in cylindrical contacts.
  • The groove to take the spring is of simple rectangular shape and therefore easy to produce. The depth is a little deeper then the thickness of the wire of the spring. This saves material and machining time. Due to the spring force in the direction A, the spring can be placed on the inner or the outer cylinder.
  • The bending in the center line is defining the height of the spring and the contact force. The flexibility of this contact spring is given by the fact, that the spring follows a 3-dimensional meander structure. So the forces which are introduced from Part 2 to Part 3 causes a resulting torsion of the spring material itself.
  • By this a good electrical contact is given in the special mentioned application.
  • Figur 2 shows several perspective views of the contact element, as well as its position on a busbar for a Medium Voltage Switchgear.
  • The contact spring is located at the ends on this busbar, which will be pushed into tube-formed contacts on both sides of the busbar.

Claims (9)

  1. Electrical contact element between a first and a second contact part, characterized in that the contact element is a spring in form of a meander, by which the meander follows in its parallel sections a v-formed path in a plane A, and a further v-shape in the plane B which is at least approximately orthogonal to plane A.
  2. Electrical contact element according to claim 1,
    characterized in that the first and second contact part are the inner and outer part of a busbar connection in high or medium voltage switchgears.
  3. Electrical contact element according to claim 1,
    characterized in that that the first and second contact part are the inner and outer part of a disconnecter-, grounding- or threeposition-switch in medium or high voltage switchgears.
  4. Electrical contact element according to claim 1,
    characterized in that that the first and second contact part are the inner and outer part of a moveable contact of vacuum circuitbreaker in medium or high voltage switchgears.
  5. Electrical contact element according to claim 1 or 2,
    characterized in that the spring meander of the contact element is following or formed as a closed ring spring arrangement.
  6. Electrical contact element according to claim 1, 2 or 3,
    characterized in that the contact element is made of copper-zirconium,
  7. Electrical contact element according to claim 1, 2 or 3,
    characterized in that the contact element is made of copper-beryllium
  8. Electrical contact element according to claim 4 or 5,
    characterized in that the spring meander of the contact element is made of a round profile.
  9. Electrical contact element according to claim 4 or 5,
    characterized in that the spring meander of the contact element is made of a flat cutted or stamped profile which is mechanically transformed into a round profile by milling.
EP10014523A 2010-11-11 2010-11-11 Electrical contact element between a first and a second contact part Withdrawn EP2453528A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10014523A EP2453528A1 (en) 2010-11-11 2010-11-11 Electrical contact element between a first and a second contact part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10014523A EP2453528A1 (en) 2010-11-11 2010-11-11 Electrical contact element between a first and a second contact part

Publications (1)

Publication Number Publication Date
EP2453528A1 true EP2453528A1 (en) 2012-05-16

Family

ID=43719564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10014523A Withdrawn EP2453528A1 (en) 2010-11-11 2010-11-11 Electrical contact element between a first and a second contact part

Country Status (1)

Country Link
EP (1) EP2453528A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014100421B3 (en) * 2014-01-15 2015-01-15 Maschinenfabrik Reinhausen Gmbh Switch for a switching device with switching shaft, its use in a diverter switch, switching device with switching shaft and switch, their use in an on-load tap-changer, load switch for on-load tap-changer and control transformer
GB2519770A (en) * 2013-10-29 2015-05-06 Connectors Ltd Ab Spring clip, latching mechanism incorporating the spring clip and method of manufacture of spring clip

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH222876A (en) * 1941-08-12 1942-08-15 Philips Nv Push-in and push-out coupling for electrical conductors.
EP0716474A1 (en) * 1994-12-05 1996-06-12 Multi-Contact Ag Contact element for connecting two contact pieces
EP1164658A2 (en) * 2000-06-14 2001-12-19 Alstom Electrical connector
US20050095926A1 (en) * 2003-10-30 2005-05-05 Copper Charles D. Electrical contact with plural arch-shaped elements

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH222876A (en) * 1941-08-12 1942-08-15 Philips Nv Push-in and push-out coupling for electrical conductors.
EP0716474A1 (en) * 1994-12-05 1996-06-12 Multi-Contact Ag Contact element for connecting two contact pieces
EP1164658A2 (en) * 2000-06-14 2001-12-19 Alstom Electrical connector
US20050095926A1 (en) * 2003-10-30 2005-05-05 Copper Charles D. Electrical contact with plural arch-shaped elements

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2519770A (en) * 2013-10-29 2015-05-06 Connectors Ltd Ab Spring clip, latching mechanism incorporating the spring clip and method of manufacture of spring clip
GB2519770B (en) * 2013-10-29 2016-12-28 Ab Connectors Ltd Connector assembly incorporating a spring clip
DE102014100421B3 (en) * 2014-01-15 2015-01-15 Maschinenfabrik Reinhausen Gmbh Switch for a switching device with switching shaft, its use in a diverter switch, switching device with switching shaft and switch, their use in an on-load tap-changer, load switch for on-load tap-changer and control transformer

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