EP1494252B1 - Kontaktfinger für Hochleistungsschalter - Google Patents

Kontaktfinger für Hochleistungsschalter Download PDF

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Publication number
EP1494252B1
EP1494252B1 EP03405494A EP03405494A EP1494252B1 EP 1494252 B1 EP1494252 B1 EP 1494252B1 EP 03405494 A EP03405494 A EP 03405494A EP 03405494 A EP03405494 A EP 03405494A EP 1494252 B1 EP1494252 B1 EP 1494252B1
Authority
EP
European Patent Office
Prior art keywords
contact
contact piece
leaf spring
contact finger
longitudinal direction
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.)
Expired - Lifetime
Application number
EP03405494A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1494252A1 (de
Inventor
Jean-Claude Mauroux
Patrick Huguenot
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 AT03405494T priority Critical patent/ATE373868T1/de
Priority to EP03405494A priority patent/EP1494252B1/de
Priority to DE50308222T priority patent/DE50308222D1/de
Priority to US10/870,161 priority patent/US6884952B2/en
Priority to JP2004188180A priority patent/JP4541780B2/ja
Priority to CNB2004100620867A priority patent/CN100361255C/zh
Publication of EP1494252A1 publication Critical patent/EP1494252A1/de
Application granted granted Critical
Publication of EP1494252B1 publication Critical patent/EP1494252B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01H1/44—Contacts characterised by the manner in which co-operating contacts engage by sliding with resilient mounting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts

Definitions

  • the invention relates to the field of high-voltage switch technology, in particular contact fingers, as used in high-performance circuit breakers, in particular in circuit breakers. It relates to a contact finger module, a separator module and a high-performance switch according to the preamble of the independent claims.
  • Contact finger modules are known from the prior art, which consist of a longitudinally extending leaf spring and a contact finger, comprising a contact piece and a longitudinally extending flexible contact piece carrier.
  • high-performance switches such as generator switches, such contact finger modules are used in separator modules for contacting the separator tube.
  • the contact piece of the flexible contact piece carrier projects beyond a deflection direction which is oriented substantially perpendicular to the longitudinal direction.
  • a through the flexible contact piece carrier and centrally extending into the contact screw the flexible contact piece carrier and the contact piece are connected together.
  • An insulating plate arranged on the side of the flexible contact piece carrier facing away from the contact piece is arranged between the contact piece carrier and the head of the screw of the screw connection and extends in the longitudinal direction beyond the contact piece in the direction of the fastening end.
  • the leaf spring is arcuately curved over almost its entire length and extends in the assembled state of the attachment end in the longitudinal direction to the contact piece and up to the insulation plate.
  • the leaf spring rests on the insulation plate, so that by the leaf spring a counteracting a deflection of the contact piece in the deflection direction force is effected without flowing through the leaf spring, a current in the contact piece.
  • the leaf spring At the resting on the insulating plate end of the leaf spring, the leaf spring on a leading away from the flexible contact piece carrier crease, whereby in the assembled state with the longitudinal direction an angle of about 20 ° and enclosing leading away from the contact piece carrier end of the leaf spring.
  • Such justifyfingermodul has the disadvantage of unfavorable field control, since the contact piece and the flexible contact piece carrier and the head of the screw of the screw and the leading away from the contact piece carrier end of the leaf spring at the end remote from the attachment end to a lead to uneven field distribution with high electric fields at edges and ends of the contact finger module.
  • the inventive contact finger module is characterized in that the leaf spring in the mounted state projects beyond the contact finger in the longitudinal direction and the location of the force from the leaf spring into the contact finger with respect to the longitudinal direction in the middle of the extension of the contact piece in the longitudinal direction or on the side facing away from the attachment end of this center lies.
  • a relatively large contact pressure (large contact force) of the contact piece is achieved at a low bias of the leaf spring, which can be exerted by the pressure of the leaf spring on the contact finger of the contact piece.
  • the leaf spring instead of serving only to generate a sufficient contact pressure of the contact piece on another contact piece, which forms a releasable electrical contact with this together, the leaf spring also takes over the solution of field control tasks.
  • the leaf spring extends in the assembled state in the longitudinal direction until at least the end of the extension of the contact finger in the longitudinal direction. This achieves even better field control.
  • the leaf spring is bent at the end remote from its attachment end against the deflection direction or bent by at least 180 ° in the deflection. In this way, field peaks, which can be exhibited on exposed edges of the leaf spring, largely avoided, so that a substantially homogeneous field distribution and a correspondingly good field control is achieved.
  • field peaks which can be exhibited on exposed edges of the leaf spring, particularly well avoided, so that a substantially homogeneous field distribution and a correspondingly good field control is achieved.
  • the leaf spring in the unmounted state is formed without bending between its ends.
  • it is also formed without bending at its attachment end.
  • Such a leaf spring is simple and reproducible to produce, that is, there are narrow tolerances can be specified, and it is a small spread of contact forces reachable.
  • the flexible contact piece carrier includes a plate pack of electrically conductive slats. It is advantageous to use silver-plated copper lamellae, in particular with thicknesses between 0.1 mm and 0.7 mm, preferably between 0.15 mm and 0.3 mm.
  • the contact piece carrier is arranged in the deflection above the contact piece, wherein the contact piece carrier and the contact piece are fixed together by means of a radial rivet.
  • a radial rivet also known as a wobble connection
  • the tumble connection is a captive connection.
  • the contact finger module two or three contact fingers are each shown with at least one contact piece and at least one flexible contact piece carrier, which contact piece carrier have a common attachment end, and wherein two or three leaf springs are exhibited, which is a common
  • Each having a leaf spring cooperates with a respective contact finger such that a deflection of the contact piece of the contact finger in the deflection direction counteracting force is effected by the leaf spring, and wherein the respective leaf spring in the assembled state in the longitudinal direction to at least the middle of the extent of respective contact piece extends in the longitudinal direction.
  • each case two or three leaf springs are combined in a preferably integrally formed component and in each case two or three contact fingers are combined in one component, which may be formed in one piece.
  • the component containing the contact fingers comprises two or three contact pieces and a component having the two or three flexible contact piece supports.
  • the latter component may for example be integrally formed, or, in the case of a disk pack, advantageously the individual disks of the two or three flexible contact piece carrier are integrally formed.
  • the high-performance switch according to the invention with a plurality of contact finger modules acting as part of a detachable electrical contact is characterized by the fact that inventive contact finger modules are shown.
  • the advantages are the above.
  • the contact finger modules are preferably used in the rated circuit and / or in the circuit breaker of the heavy-duty circuit breaker. Typical rated currents and voltages, which are switched with such a high-power switch, are between 6 kA and 40 kA at 1 kV to 50 kV.
  • the disconnector module according to the invention for a high-power switch comprises at least one drive housing and a movable disconnector tube and a plurality of contact finger modules arranged on the drive housing or on the disconnector tube, acting as part of a detachable electrical contact between isolator tube and drive housing. It is distinctive in that inventive contact finger modules are exhibited. The advantages are the above.
  • Fig. 1 shows schematically a separator module according to the invention in the closed state in partial section.
  • the separator module is provided as part of a high-power switch, in particular a high-current switch or generator switch.
  • the separator module has a separator drive housing 10a and an extinguishing chamber drive housing 10b and a separator tube 11.
  • the separator module is part of the active part of the high-power switch, and the two drive housings 10a, 10b are mounted on insulators 13, 14 on a base plate 15, which is at ground potential.
  • the separator tube 11 serves to generate a visible separation path.
  • the separator tube 11 is movable by means of a schematically indicated drive 12 along an axis which runs parallel to a longitudinal direction x shown in FIG.
  • the disconnector tube 11 is in electrical contact with contact finger modules 1 at both ends thereof.
  • On the disconnector drive housing 10a and the quenching chamber drive housing 10b a plurality of contact finger modules 1 are respectively formed along a circumference of the respective drive housing 10a, 10b arranged.
  • the contact finger modules 1 each include at least one contact finger 2 with a contact piece 4 and at least one leaf spring 3. Dle contact finger modules 1 are shown in Figs. 2 and 3 described in more detail.
  • the separator tube 11 is moved counter to the longitudinal direction x, so that the Erschschschsgephaseuse solutionen Kunststofffinger modules 1 are no longer in electrical contact with the separator tube 11 and a sufficient gap between the drive chambers 10a, 10b is exhibited.
  • the Leaf springs 3 cause in the closed state a contact pressure through which the contact pieces 4 are pressed against the separator tube 11.
  • the separator tube 11 is moved in the longitudinal direction x, so that both the separator drive housing side and the extinguishing chamber drive housing side contact finger module 1 contact the separator tube 11.
  • the separator tube 11 has a trenner drive housing side along the longitudinal direction x, advantageously a rounded stepped outer diameter.
  • the trenner drive housing-side contact finger modules 1 are also in the open state in electrical contact with the separator tube 11; the separator drive housing side contacts 4 are then supported on the separator tube 11 in a region of reduced separator tube outer diameter.
  • the leaf springs 3 have a mechanical bias in this state, by means of which the contact pieces 4 are pressed against the separator tube 11.
  • a low ratio of this mechanical bias to the contact pressure with which the contact pieces 4 are pressed in the closed state of the leaf springs 3 to the separator tube, is very advantageous because a reduced insertion force for the separator tube 11 when switching and a reduced abrasion of the contact pieces. 4 is present at a sufficiently large contact pressure.
  • said ratio is low.
  • a particularly far contacting end-side arrangement of the location of the introduction of force from the leaf spring 3 in the contact fingers 2 at a given contact pressure means a reduction of the mechanical retraction resistance when closing the circuit breaker. For even in this case, the ratio of a caused by the leaf springs 3 mechanical bias to the contact pressure is small.
  • All contact pieces 4 experience when closing the separator module a deflection along a deflection, which is directed radially outward and is thus aligned perpendicular to the longitudinal direction x.
  • Contact forces for effecting suitable contact pressures per contact piece 4 are typically between 20 N and 40 N, in particular between 25 N and 35 N.
  • Corresponding preload forces per contact piece 4 are typically between 10 N and 20 N, in particular between 12 N and 18 N.
  • a high power switch according to the invention may include a disconnector module such as that shown in FIG. 1, in which case the disconnector drive housing 10a is advantageously arranged on the mains side, while the quenching chamber drive housing 10b is connected to an extinguishing chamber, not shown, which is arranged on the generator side.
  • Contact finger modules 1 according to the invention can also be used at other switching points or contact points in high-performance circuit breakers, for example in the quenching chamber or otherwise preferably in the rated circuit, in particular in combination with contact-resistant contact areas.
  • FIG. 2 shows a sectional view of a contact finger module 1 according to the invention corresponding to one of the contact finger modules 1 shown in FIG. 1 in the mounted state.
  • the contact finger module 1 is fixed to the isolator drive housing 10a, which is only indicated, by means of a screw connection 9, which at the same time also actuates the leaf spring 3 the contact fingers 2, or more precisely a flexible contact piece carrier 5 of the contact finger 2, fixed.
  • the ends 31,51 of the leaf spring 3 and the flexible contact piece carrier 5, on which the leaf spring 3 and the flexible contact piece carrier 5 is mounted on the high-power switch, are referred to as attachment ends 31,51.
  • the leaf spring 3 and the contact piece carrier 5 each have a bore 7.8.
  • the flexible contact piece carrier 5 extends along the longitudinal direction x and also has an extension along the deflection direction designated z. This is optional, is advantageously caused by one or two kinks or bends of the contact piece carrier 5 and is preferably aligned counter to the deflection z.
  • the contact piece carrier 5 is connected to the contact piece 4. This projects beyond the contact piece carrier 5 against the deflection z.
  • the connection between the contact piece carrier 4 and the contact piece 4 is advantageously formed by a tumble connection 6, also referred to as radial rivets 6.
  • a tumble connection 6 also referred to as radial rivets 6.
  • Other positive, positive or cohesive connections are also possible.
  • a washer 6a may be disposed between the flexible contact piece carrier 5 and the head of the radial rivet 6.
  • the contact piece 4 serves to make contact with a second contact piece, not shown, which is movable relative to the contact finger module 1 along the longitudinal direction x and can form a releasable electrical contact with the contact piece 4 (in the closed state).
  • this second contact piece is formed by the separator tube 11.
  • the contact piece 4 consists of material of high electrical conductivity, in particular copper, which advantageously has a silver coating.
  • the flexible contact piece carrier 5 is advantageously designed as a disk set.
  • the lamellae are made of material of high electrical conductivity and can have an electrically conductive coating.
  • the fins are made of copper and advantageously have a silver coating.
  • the individual lamellae are advantageously of identical design and have a thickness of typically between 0.1 mm and 0.7 mm, preferably between 0.15 mm and 0.3 mm. In this way, a suitable elastic deformability of the flexible contact piece carrier 5 can be achieved with high electrical conductivity.
  • the preferably metallic, in particular steel leaf spring 3 is arranged on the side facing away from the contact piece 4 of the flexible contact piece carrier 5. Except at its end 32 it is formed without bending and extends advantageously, as shown in Fig. 2, along the longitudinal direction x. At its end 32, the leaf spring 3 is bent counter to the deflection direction z by more than 180 °. It could also be bent at a smaller angle. The last piece of the end 32 of the leaf spring 3 encloses with the axis of the longitudinal direction an angle ⁇ , which is advantageously at least 5 ° or at least 10 °.
  • the contact and force introduction point of the leaf spring 3 is at an x F designated longitudinal coordinate, which is farther from the attachment end 31 than the longitudinal coordinate x 1 of the center of the contact piece 4th
  • the leaf spring extends to a longitudinal direction coordinate x L.
  • This is arranged in Fig. 2 on the mounting end 31,51 facing away from a longitudinal direction coordinate x 1 , which denotes the center of the extension of the contact piece 4 in the longitudinal direction.
  • x L is disposed on the side of a longitudinal direction coordinate x 0 facing away from the attachment end 31, 51, which designates the end of the extension of the contact finger 2 in the longitudinal direction.
  • the contact piece 4 does not necessarily terminate flush in the longitudinal direction x with the contacting end 52 of the contact piece carrier 5, as shown in FIG.
  • the contact piece 4 may protrude beyond the contact piece carrier 5 in the longitudinal direction x or be surmounted by this.
  • the contact piece 4 is arranged at the contacting end 52 of the contact piece carrier 5, and its longitudinal extent is a good measure of the size of the contact finger module 1.
  • a good field control effect of the leaf spring 3 is already achieved when the leaf spring 3 in the longitudinal direction x to at least the center x 1 of the extension of the contact piece 4 in the longitudinal direction x extends.
  • the leaf spring 3 can also be bent in the direction of the deflection z (not shown). Then a bend of at least 180 °, like also greater than 270 °, advantageous to achieve a good field control.
  • the leaf spring 3 may advantageously be bent between its ends 31, 32 against the deflection direction z and / or extend there (partially also) counter to the deflection direction z, and
  • a spacing means (not shown) can be arranged between the leaf spring 3 and the contact piece carrier 5 in order to simplify the application of the contact pressure by the leaf spring 3 to the contact finger 2.
  • the contact finger module 1 according to FIG. 2 may have one, two, three or more contact fingers 2 and leaf springs 3.
  • the particularly advantageous embodiment with two contact fingers and leaf springs is shown in Fig. 3.
  • FIG. 3 shows a view of the corresponding contact finger module 1 according to FIG. 2 from the direction indicated by "III" in FIG. 2.
  • the two contact fingers 2, 2 '(or more precisely, the two contact piece carriers 5, 5') advantageously have a common attachment end 51.
  • the two respective contact fingers 2, 2 'and the two leaf springs 3, 3' have a similar design and advantageously also have the same effect.
  • a contact finger 2 may be two or more pieces, but also formed in one piece. Currents that flow permanently through a contact finger 2 in the closed state are typically between 80 A and 200 A, in particular between 100 A and 160 A.
  • a contact finger module 1 having two contact fingers 2, 2 ' carries currents twice as large.
  • the leaf springs 3, 3 ' can be of the same width, wider or advantageously less wide than the flexible contact piece carriers 5, 5'.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Contacts (AREA)
  • Push-Button Switches (AREA)
  • Slide Switches (AREA)
EP03405494A 2003-07-02 2003-07-02 Kontaktfinger für Hochleistungsschalter Expired - Lifetime EP1494252B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AT03405494T ATE373868T1 (de) 2003-07-02 2003-07-02 Kontaktfinger für hochleistungsschalter
EP03405494A EP1494252B1 (de) 2003-07-02 2003-07-02 Kontaktfinger für Hochleistungsschalter
DE50308222T DE50308222D1 (de) 2003-07-02 2003-07-02 Kontaktfinger für Hochleistungsschalter
US10/870,161 US6884952B2 (en) 2003-07-02 2004-06-18 Contact finger for a high-power switchgear
JP2004188180A JP4541780B2 (ja) 2003-07-02 2004-06-25 大電力遮断器用の接触フィンガー
CNB2004100620867A CN100361255C (zh) 2003-07-02 2004-07-02 用于高功率开关的接触指

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03405494A EP1494252B1 (de) 2003-07-02 2003-07-02 Kontaktfinger für Hochleistungsschalter

Publications (2)

Publication Number Publication Date
EP1494252A1 EP1494252A1 (de) 2005-01-05
EP1494252B1 true EP1494252B1 (de) 2007-09-19

Family

ID=33427286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03405494A Expired - Lifetime EP1494252B1 (de) 2003-07-02 2003-07-02 Kontaktfinger für Hochleistungsschalter

Country Status (6)

Country Link
US (1) US6884952B2 (zh)
EP (1) EP1494252B1 (zh)
JP (1) JP4541780B2 (zh)
CN (1) CN100361255C (zh)
AT (1) ATE373868T1 (zh)
DE (1) DE50308222D1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1926112A1 (de) * 2006-11-23 2008-05-28 ABB Technology AG Elektrisches Kontaktsystem für ein elektrisches Schaltgerät
US7654844B1 (en) 2008-08-22 2010-02-02 International Business Machines Corporation Telescopic power connector
EP2541569B2 (en) † 2011-06-29 2023-12-20 Hitachi Energy Ltd Dual current path for high rated currents
US9383786B2 (en) * 2012-12-14 2016-07-05 Dell Products L.P. Telescoping enclosure for information handling system component
USD761211S1 (en) 2013-11-21 2016-07-12 Omron Corporation Push switch
USD761212S1 (en) 2013-11-21 2016-07-12 Omron Corporation Push switch
USD743917S1 (en) * 2013-11-21 2015-11-24 Omron Corporation Push switch
MX348193B (es) * 2014-11-26 2017-05-29 Sotnikov Mikhail Interruptor de desconexión telescópico de alto voltaje aislado por aire para bus de fase-aislada.

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1699858A (en) * 1926-04-17 1929-01-22 Russell Mfg Co Contact finger for electrical controllers and switches
US2256734A (en) * 1938-05-12 1941-09-23 Delta Star Electric Co Contact finger for switches
JPS51117158U (zh) * 1975-03-19 1976-09-22
CH645204A5 (de) * 1979-05-25 1984-09-14 Bbc Brown Boveri & Cie Elektrischer schalter fuer grosse stroeme.
JPS5742508U (zh) * 1980-08-20 1982-03-08
FR2565420B1 (fr) * 1984-05-30 1986-08-22 Alsthom Atlantique Connecteur pour sectionneur telescopique
DE3736835A1 (de) * 1987-10-30 1989-05-11 Bbc Brown Boveri & Cie Hochspannungsschalter
JPH01243328A (ja) * 1988-03-25 1989-09-28 Hitachi Ltd パツフア式ガス遮断器
JP2743740B2 (ja) * 1992-11-05 1998-04-22 三菱電機株式会社 ガス絶縁開閉器
DE19648633A1 (de) * 1996-11-25 1998-05-28 Asea Brown Boveri Elektrisches Schaltgerät
DE19816508A1 (de) * 1998-04-14 1999-10-21 Asea Brown Boveri Abbrandschaltanordnung
DE19816509B4 (de) * 1998-04-14 2006-08-10 Abb Schweiz Ag Abbrandschaltanordnung
JP2000134730A (ja) * 1998-10-27 2000-05-12 Mitsubishi Electric Corp 端子接続装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP2005026226A (ja) 2005-01-27
JP4541780B2 (ja) 2010-09-08
ATE373868T1 (de) 2007-10-15
CN1577686A (zh) 2005-02-09
CN100361255C (zh) 2008-01-09
EP1494252A1 (de) 2005-01-05
DE50308222D1 (de) 2007-10-31
US6884952B2 (en) 2005-04-26
US20050000944A1 (en) 2005-01-06

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