US3780239A - Electrical contact assembly - Google Patents

Electrical contact assembly Download PDF

Info

Publication number
US3780239A
US3780239A US00301688A US3780239DA US3780239A US 3780239 A US3780239 A US 3780239A US 00301688 A US00301688 A US 00301688A US 3780239D A US3780239D A US 3780239DA US 3780239 A US3780239 A US 3780239A
Authority
US
United States
Prior art keywords
contact
centering bolt
centering
bolt
openings
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
US00301688A
Other languages
English (en)
Inventor
E Guidosh
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 Inc USA
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of US3780239A publication Critical patent/US3780239A/en
Assigned to ABB POWER T&D COMPANY, INC., A DE CORP. reassignment ABB POWER T&D COMPANY, INC., A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • 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
    • H01H9/0005—Tap change devices
    • H01H9/0016—Contact arrangements for tap changers

Definitions

  • ABSTRACT Electrical contact assembly having at least four contact structures. Each contact structure is positioned around a centering bolt. Compressed springs are located between each inner contact structure and between the upper contact structure and the upper. end of the centering bolt. A sleeve is located between the lower contact structure and the lower end of the centering bolt. The centering bolt extends through openings in a contact carrier. Movement of the contact structures in a direction parallel to the axis of the centering bolt is provided by changing the compression of the springs and/0r moving the centering bolt.
  • FIG. I is a partial plan view of a tap changer contact and terminal arrangement
  • FIG. 2 is an exploded view of an electrical contact as sembly constructed according to this invention.
  • FIG. 3 is a sectional elevation view of an electrical contact assembly constructed according to this invention.
  • FIG. I there is shown a portion of a transformer tap changer.
  • An electrical contact assembly 10 is attached to a rotatable arm 12.
  • the contact assembly 10 includes contacts, such as contact 14, which engage with a terminal ring 16 and with one of the stationary terminals 18.
  • the terminal ring 16 and the stationary terminals 18 are electrically connected to other associated electrical apparatus such as a transformer winding or bushing.
  • the contact assembly 10 engages with the other stationary terminals 18 which are attached to the mounting member 19.
  • FIG. 2 is an exploded view of the contact assembly 10.
  • the assembly 10 includes the contact carrier 20 which contains an upper opening 22 and a lower opening which is not shown in FIG. 2.
  • the lower portion of the contact carrier 20 also includes a projection 24 which contains a threaded opening to permit attachment of the contact carrier 20 to the arm 12.
  • the contact carrier 20 may be constructed of a metallic material such as steel.
  • the contacts 14, 26, 28 and 30 are constructed of a good electrical conducting material such as copper.
  • a suitable material such'as coin silver, may be disposed on the contacts to form conducting surfaces, such as the surfaces 32 and 34 on contact 26.
  • Each of the contacts 14, 26, 28 and 30 contains an opening, such as the opening 36 in contact 14.
  • the saddles 38, 40, 42, and 44 help guide the contacts within the contact carrier 20 and form wells, suchas well 43, which provide convenient regions for the location of other members of the contact assembly 10.
  • a centering bolt 46 is positioned through the upper opening 22, through openings, such as the opening 36, in the contacts 14, 26, 28 and 30, and through a lower opening in the contact carrier.
  • the first or upper end 48 of the centering bolt includes a head 52 against which a coil spring 54 is positioned.
  • the coil spring 54 When the members are assembled, such as shown in FIG. 3, the coil spring 54 extends through the opening 22 and through the opening 56 in the saddle 38, and the coil spring 54 is positioned against the contact 14.
  • a coil spring 58 is positioned around the centering bolt 46 and is compressed between the contacts 26 and 28.
  • the second or lower end 50 of the centering bolt is attached to a suitable restraining means, such as the nut 60 and the sleeve 62.
  • FIG. 3 illustrates, in section, an assembled contact assembly constructed according to this invention and FIG. 3 will be used in describing the operation thereof.
  • the contact assembly 10 is shown in engagement with the terminal ring 16 and the stationary terminal 18.
  • FIG. 3 also illustrates an insulating spacer 66 positioned between the spring 58 and the contact 26 to prevent the conduction of large currents through the spring 58.
  • Spring 58, as well as spring 54, could also be coated with an insulating material, such as epoxy.
  • the openings 32 and 72 in the contact carrier 20 are sufficiently large enough to permit movement of the centering bolt 46 transversely with respect to its longitudinal axis. The extent of this movement is limited by the distance between the saddles 38 and 44 and the contact carrier 20.
  • the overall effect of the arrangment illustrated is to provide a contact assembly 10 wherein each of the contacts 14, 26, 28 and 30 are floating, that is, transversely movable to allow engagement and to allow the terminal misalignment.
  • a limited amount of simultaneous movement of all four ofthe contacts 14, 26, 28 and 30 is provided by the transverse movement of the centering bolt 46.
  • one of the springs 54 or 58 must be compressed further.
  • the contact 14 is raised, that is, moved in a direction which is toward the centering bolt end 48, the spring 54 is compressed further.
  • the contact 26 is lowered, that is moved in a direction which is toward the centering bolt end 50, or when the contact 28 is raised, the spring 58 is compressed further.
  • Spring 54 is also further compressed when the contact 30 is lowered.
  • the sleeve 20 slides witin the opening 72 and helps center the centering bolt 46 within the opening 72.
  • the bolt 46 is centered in the opening 32 by the spring 54 and, when the bolt is lowered, by the bolt head 52.
  • the invention disclosed herein provides a floating contact assembly having a minimum number of components contained in a minimum amount of space. Additional contacts may be used within the contemplation of this invention.
  • the centering bolt 46 and the contact carrier 20 may be longer than shown in-FlG. 3. With the longer members, an additional pair of contacts may be inserted between the sleeve 62 and the contact 30, along with an additional spring position between the new contacts and the contact 30.
  • An electrical contact assembly comprising:
  • centering bolt having first and second ends, said centering bolt being movably positioned in the openings of said contact carrier;
  • first, second, third and fourth contacts each having an opening therein through which said centering bolt extends;
  • the electrical contact assembly of claim 1 wherein the means for forcing said first contact away from the first end of the centering bolt comprises a compressed coil spring which is positioned around the centering bolt and between the first end of the centering bolt and the first contact.
  • the electrical contact assembly of claim 1 wherein the means for forcing the second contact toward the first end of the centering bolt and for forcing the third contact toward the second end of the centering bolt comprises a compressed coil spring which is positioned around the centering bolt and between the second and third contacts.
  • the means for maintaining a predetermined distance between the fourth contact and the second end of the centering bolt comprises a sleeve restrained at the second end of the centering bolt, said sleeve extending through one of the openings in the contact carrier and abutting a face of the fourth contact.
  • An electrical contact assembly for tap changer comprising:
  • a contact carrier having upper and lower openings therein;
  • first, second, third and fourth contact structures each containing an opening therein;
  • a longitudinal centering bolt extending through the openings in said first, second, third and fourth contact structures, and the openings in said contact carrier the diameter of said centering bolt being suitably dimensioned to allow the sliding of said first, second, third and fourth contact structures with respect to said centering bolt;
  • a first compressed coil spring positioned around said centering bolt and located between the first end of said centering bolt and said first contact structure

Landscapes

  • Measuring Leads Or Probes (AREA)
US00301688A 1972-10-27 1972-10-27 Electrical contact assembly Expired - Lifetime US3780239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30168872A 1972-10-27 1972-10-27

Publications (1)

Publication Number Publication Date
US3780239A true US3780239A (en) 1973-12-18

Family

ID=23164440

Family Applications (1)

Application Number Title Priority Date Filing Date
US00301688A Expired - Lifetime US3780239A (en) 1972-10-27 1972-10-27 Electrical contact assembly

Country Status (2)

Country Link
US (1) US3780239A (fr)
BE (1) BE806486A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090211887A1 (en) * 2008-02-26 2009-08-27 Riming Xiao Moving contact head for tap switches
CN102436939A (zh) * 2011-09-30 2012-05-02 上海华明电力设备集团有限公司 一种滚动式触头组件
CN102820160A (zh) * 2011-06-07 2012-12-12 Abb有限公司 开关
WO2014096509A1 (fr) * 2012-12-20 2014-06-26 Abb Oy Contact mobile d'interrupteur électrique
GB2524502A (en) * 2014-03-24 2015-09-30 Eaton Ind Netherlands Bv Plug contact

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192328A (en) * 1963-02-01 1965-06-29 Mc Graw Edison Co Movable switch contact assembly with self-aligning bridging plate members
US3396248A (en) * 1966-12-12 1968-08-06 Mc Graw Edison Co Tap changer
GB1204810A (en) * 1967-07-04 1970-09-09 Licentia Gmbh Arrangement for the retarding of movable contacts of on-load tapchanging switches

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3192328A (en) * 1963-02-01 1965-06-29 Mc Graw Edison Co Movable switch contact assembly with self-aligning bridging plate members
US3396248A (en) * 1966-12-12 1968-08-06 Mc Graw Edison Co Tap changer
GB1204810A (en) * 1967-07-04 1970-09-09 Licentia Gmbh Arrangement for the retarding of movable contacts of on-load tapchanging switches

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090211887A1 (en) * 2008-02-26 2009-08-27 Riming Xiao Moving contact head for tap switches
US8153917B2 (en) * 2008-02-26 2012-04-10 Shanghai Huaming Power Equipment Co., Ltd. Moving contact head for tap switches
CN102820160A (zh) * 2011-06-07 2012-12-12 Abb有限公司 开关
CN103582925A (zh) * 2011-06-07 2014-02-12 Abb有限公司 开关
CN102436939A (zh) * 2011-09-30 2012-05-02 上海华明电力设备集团有限公司 一种滚动式触头组件
WO2014096509A1 (fr) * 2012-12-20 2014-06-26 Abb Oy Contact mobile d'interrupteur électrique
CN104871274A (zh) * 2012-12-20 2015-08-26 Abb有限公司 电气开关的可动触点
RU2585750C1 (ru) * 2012-12-20 2016-06-10 Абб Ои Подвижный контакт электрического переключателя
US9697958B2 (en) 2012-12-20 2017-07-04 Abb Oy Movable contact of electric switch
CN104871274B (zh) * 2012-12-20 2017-09-12 Abb 有限公司 电气开关的可动触点
GB2524502A (en) * 2014-03-24 2015-09-30 Eaton Ind Netherlands Bv Plug contact

Also Published As

Publication number Publication date
BE806486A (fr) 1974-04-25

Similar Documents

Publication Publication Date Title
US5468164A (en) Female contact, in particular for a high tension section switch
GB1163271A (en) Circuit Interrupters
CA1089550A (fr) Dispositif de contact pour courant eleve
US2265006A (en) Disconnecting contact
US3780239A (en) Electrical contact assembly
US3009043A (en) Disconnecting contact
US6462295B1 (en) High-voltage power circuit breaker comprising an insulating nozzle
US2449479A (en) Electrical contacts
US2229504A (en) Switch construction
US3177305A (en) Dual-voltage transformer switch
US2303516A (en) Circuit interrupter
US2109226A (en) Circuit breaker
US2450924A (en) Electromagnetic switch
US3194934A (en) Segmented contact assembly having pivotal and sidewise-rotatable contact segments
US4719325A (en) Contact arrangement with contact levers pivoted relative to each other in a holder
US3148260A (en) Disconnecting switch having surge suppressing impedance
US2894101A (en) Switch contact construction
US2849579A (en) Contact structure
US3790732A (en) Electrical contact apparatus
US3634634A (en) Disconnect switch for electric power systems
US3177307A (en) Tap changer rotary switch with radially spaced movable contact members and motion limiting means
US2661408A (en) Electrical switch
US3302144A (en) High speed circuit breaker with flip-flop mechanism
CN109564830B (zh) 用于高压开关设备的接触装置及其应用和制造
US5395247A (en) Sliding contact

Legal Events

Date Code Title Description
AS Assignment

Owner name: ABB POWER T&D COMPANY, INC., A DE CORP., PENNSYLV

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESTINGHOUSE ELECTRIC CORPORATION, A CORP. OF PA.;REEL/FRAME:005368/0692

Effective date: 19891229