US3305657A - Circuit breaker for high power, high voltage networks - Google Patents

Circuit breaker for high power, high voltage networks Download PDF

Info

Publication number
US3305657A
US3305657A US355331A US35533164A US3305657A US 3305657 A US3305657 A US 3305657A US 355331 A US355331 A US 355331A US 35533164 A US35533164 A US 35533164A US 3305657 A US3305657 A US 3305657A
Authority
US
United States
Prior art keywords
vacuum switch
isolator
circuit breaker
phase
high voltage
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
US355331A
Other languages
English (en)
Inventor
Roxburgh Albert
Gibson Arthur Charles
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Application granted granted Critical
Publication of US3305657A publication Critical patent/US3305657A/en
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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
    • H01H33/66—Vacuum switches
    • H01H33/666—Operating arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B11/00—Switchgear having carriage withdrawable for isolation
    • H02B11/18—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal
    • H02B11/20—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal having an enclosure
    • H02B11/22—Switchgear having carriage withdrawable for isolation with isolation by vertical withdrawal having an enclosure wherein front of enclosure moves with carriage upon horizontal withdrawal subsequent to isolation
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers
    • H01H2033/024—Details particular to three-phase circuit breakers with a triangular setup of circuit breakers
    • 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
    • H01H33/022—Details particular to three-phase circuit breakers

Definitions

  • an electric power switchgear comprising a traversible switching unit having vertical terminals for engaging vertical plugging isolator contacts wherein the said terminals are interconnected within the said unit by at least one vacuum switch, and the vacuum switch has at least one terminal which is aligned with one of the said terminals of the traversible unit.
  • the envelope of the vacuum switch and the bushing of a retractable isolator contact form advantageously an integral insulating body.
  • An external terminal of the vacuum switch can then also constitute a retractable
  • the other external terminal of the vacuum switch may be connected by a conductor to an isolator contact which is retractable with the switching unit, and is spaced from the first isolator contact by a distance corresponding to the spacing between two stationary isolator contacts, connected, for instance, one to a busbar, and the other to a circuit conductor.
  • the main axis of the vacuum switch parallel to its switching movement, is usually vertical. However it may be horizontal or inclined. Then external terminals at both ends of the vacuum switch can form retractable isolator contacts and can be spaced from each other corresponding to the horizontal distance of two stationary plugging isolator contacts.
  • the vacuum switches can be contained in separate envelopes or a three-phase switching contact set can be contained in a common envelope.
  • Three single phase vacuum switches or switching contacts can have their axes arranged in a vertical common plane to form a three-phase unit.
  • single phase vacuum switches or three-phase switching contacts in a common envelope can be located with their vertical axes parallel to each other at the corners of a triangle.
  • Walls or plates of insulating material can be provided between isolators to form phase barriers between them.
  • the traversing can provide for earthing separately a busbar circuit and a consuming circuit through the unit.
  • FIG. 1 shows partly in section, and by way of example, one phase of a three-phase circuit breaker embodying the invention
  • FIG. 2 shows in a diagrammatic cross-section three vacuum switches of a three-phase circuit breaker according to the invention with their longitudinal axes in a common plane
  • FIG. 3 shows an alternative arrangement wherein the longitudinal axes of three phase switches are located at the corners of a triangle
  • FIG. 4 shows an alternative arrangement in which the longitudinal axis of the vacuum switch is inclined to the vertical
  • FIGS. 5 and 6 show details.
  • a vertical plugging isolator arrangement comprises stationary isolator contacts 1, 1a connected respectively to a consuming feeder circuit, and a supplying busbar circuit.
  • the two isolator contacts or terminals are located in separate chambers with a partition wall PW between them.
  • An earthing terminal 2 is provided in a recess of the circuit chamber and an earthing terminal 3 projects downwards from the bottom wall of the busbar chamber.
  • a truck 4 mounted on wheels or rollers for the traversing movement supports a unit 20 holding a vacuum switch 7 (three vacuum switches for three phase arrangements) enclosed in an outer casing or tank which holds the unit together.
  • a lifting screw 5 enables raising and lowering the switching unit as known per se.
  • Two or more vacuum switches can be connected in series or parallel and a common envelope may enclose two or more series or parallel connected contact pairs of the vacuum switch kind.
  • the switch is coaxial with the isolator, and both form an integral body, so that the upper switch terminal represents the retractable isolator contact.
  • the switchgear is shown in a position in which it interconnects the busbar and feeder circuits.
  • the circuit breaker isolator bushing 9 (three being provided for three-phase arrangement) is supported by the top wall of tank 20 and is horizontally spaced from the bushing 8 in accordance with the spacing between the isolator contacts 1 and 1a.
  • a downward extension 11 of a movable contact of the vacuum switch 7 projects from the enclosure and is slidably connected through finger contacts 13 to a stationary conducting ring 12, situated at the lower end of the vacuum switch envelope and forming an external terminal of the vacuum switch.
  • a conductor 10, which may be insulated, is provided to interconnect this ring terminal 12 with the conductor of the retractable plugging terminal which as shown engages the busbar isolator contact In.
  • the vacuum switch 7 is actuated by a pull rod 15 of insulating material and a bell-crank 14 from an operating shaft 19.
  • the shaft 19 serves for simultaneous operation of three vacuum switches in three-phase arrangement.
  • FIG. 1 also shows a cable CA, a cable box CB, current transformer CT, high voltage transformer VT, an other current transformer CTa on the feeder side, also a relay panel RP and instrument panel IP on the busbar side.
  • the circuit and busbar chambers and supporting panels may be of ordinary sheet steel construction.
  • a three-phase arrangement may comprise a common insulating envelope CE made of ceramic material, or cast synthetic material, or of moulded pieces which are cemented together, and containing three single phase vacuum switches SW1, SW2, SW3 with their longitudinal axes positioned in a common plane.
  • Isolator plugging bushings 9, 9", 9', corresponding to bushing 9 of FIG. 1, are then arranged in another vertical plane, and are mutually separated by insulating barriers PB1, PB2.
  • three single phase vacuum switches SW1, SW2, SW3 of a three-phase arrangement have their vertical axes located at the three corners of a triangle, the plugging isolators 9, 9", 9 being here located at the corners of another triangle, with insulating barriers PB1, PBZ between the phases.
  • the axis of a vacuum switch 7 is inclined in order to bridge the horizontal spacing between the vertical parallel axes of the isolator contacts 1, 1a.
  • the external terminals of the switch 7 are vertical, and are aligned'with the bushings 8, 9 of the isolator contacts when the switchgear is in position for plugging.
  • the vacuum switch 7 has now at the back end a ring which corresponds to the ring 12 of FIG. 1, and an external terminal for connection to the isolator contact is joined to this ring as shown in FIG. 4.
  • a pair of axially aligned external vacuum switch terminals can be used, if connectors are provided between them and the bushed plugging terminals.
  • the operating mechanism and other details of the switchgear correspond to what has been described with respect to FIG. 1.
  • FIGS. 50 and b a joint between two electric conductors, positioned at a right-angle, such as required in conjunction with the present invention, for.
  • hoirzontal and vertical sections of a busbar which forms the primary of a current transformer can be insulated by embedding the joint in a synthetic resin casting SR.
  • an insulating tubular enclosure 1E of a conductor C1 is formed with annular projections P1, P2 which may have similar or dissimilar diameter, at opposite sides thereof.
  • the projection P1 provides an opening for a conductor C2, which is coated with an insulating material and is joined to the conductor C1, using, for instance, bolts for which holes H are provided.
  • the opening formed by the projecting ring P2 is closed using a plug of insulating material or a cast resin body CB, the opening at P1 being closed by the insulated conductor C2.
  • an electric power switchgear for high power high voltage networks including a plurality of stationary vertical terminals spaced from each other a predetermined amount and a traversible switching unit, the improvemerit comprising a sealed container supported for horizontal traverse movement and for vertical plugging movement, 3.
  • terminal bushings extending upwardly from said container, said terminal bushings being in the same spaced relation as said stationary terminals for selective engagement'with a pair of said stationary terminals when said sealed container is traversed to a predetermined engaging position and is lifted to plug said terminal bushings into a pair of said stationary terminals, a vacuum switch within said container supported solely on one of the terminal bushings and extending coaxially therewith, an electrical conductor extending from the free end of said vacuum switch to the other of said terminal bushings, finger contacts supported on said vacuum switch and electrically connected to said conductor, said finger contacts slidably engaging a contact exten sion of said vacuum switch, and operating means connected to said vacuum switch for selectively opening and closing said switch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Gas-Insulated Switchgears (AREA)
US355331A 1963-04-01 1964-03-27 Circuit breaker for high power, high voltage networks Expired - Lifetime US3305657A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12834/63A GB997126A (en) 1963-04-01 1963-04-01 Improvements in and relating to power switchgear

Publications (1)

Publication Number Publication Date
US3305657A true US3305657A (en) 1967-02-21

Family

ID=10011993

Family Applications (1)

Application Number Title Priority Date Filing Date
US355331A Expired - Lifetime US3305657A (en) 1963-04-01 1964-03-27 Circuit breaker for high power, high voltage networks

Country Status (5)

Country Link
US (1) US3305657A (en, 2012)
BE (1) BE645847A (en, 2012)
CH (1) CH415796A (en, 2012)
FR (1) FR1389898A (en, 2012)
GB (1) GB997126A (en, 2012)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397293A (en) * 1965-08-13 1968-08-13 Gen Electric Metal-clad switchgear employing vacuum type circuit interrupters
US3526735A (en) * 1966-06-15 1970-09-01 Mc Graw Edison Co Repeating circuit interrupter
US3603753A (en) * 1968-02-28 1971-09-07 Westinghouse Electric Corp Metalclad switchgear using vacuum interrupter elements
US3670123A (en) * 1971-04-29 1972-06-13 Joslyn Mfg & Supply Co Multi-point to common point dead tank switch having vacuum insulated contacts and vacuum insulated terminals
JPS4729550U (en, 2012) * 1971-04-30 1972-12-04
US3784774A (en) * 1972-08-21 1974-01-08 Ite Imperial Corp Vacuum circuit breaker current transfer and actuation
US3882751A (en) * 1972-12-14 1975-05-13 Nippon Musical Instruments Mfg Electronic musical instrument employing waveshape memories
US3895199A (en) * 1972-03-06 1975-07-15 Siemens Ag Multi-pole vacuum switching apparatus
US4950854A (en) * 1989-10-31 1990-08-21 Electric Services, Inc. Vacuum operated circuit breaker apparatus for replacing air-magnetic circuit breaker assemblies
FR2689305A1 (fr) * 1992-03-27 1993-10-01 Alsthom Gec Module de coupure triphase et application notamment à un disjoncteur moyenne tension debrochable.
EP1158555A3 (en) * 2000-05-26 2003-09-17 Mitsubishi Denki Kabushiki Kaisha Vacuum circuit interrupter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753177B4 (de) * 1997-11-20 2007-09-20 Siemens Ag Antrieb für Leistungsschalter einer Schaltanlage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445588A (en) * 1944-07-11 1948-07-20 Gen Electric Electrical switchgear
US2749410A (en) * 1952-08-12 1956-06-05 Allis Chalmers Mfg Co Arc chute with perforated barrier plates having staggered slots
GB769406A (en) * 1954-03-04 1957-03-06 British Thomson Houston Co Ltd Improvements in metal-clad electric switchgear
US2810805A (en) * 1955-10-03 1957-10-22 Schwager Wood Corp Circuit interrupting and isolating switch
US2889424A (en) * 1957-12-31 1959-06-02 Bell Telephone Labor Inc Relay
US2897322A (en) * 1956-04-24 1959-07-28 Era Patents Ltd Electrical switching apparatus
US3025375A (en) * 1960-04-04 1962-03-13 Gen Electric Electric circuit breaker having a sealed interrupting unit
US3163735A (en) * 1962-06-29 1964-12-29 Gen Electric Electric circuit breaker with sealed interrupting unit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445588A (en) * 1944-07-11 1948-07-20 Gen Electric Electrical switchgear
US2749410A (en) * 1952-08-12 1956-06-05 Allis Chalmers Mfg Co Arc chute with perforated barrier plates having staggered slots
GB769406A (en) * 1954-03-04 1957-03-06 British Thomson Houston Co Ltd Improvements in metal-clad electric switchgear
US2810805A (en) * 1955-10-03 1957-10-22 Schwager Wood Corp Circuit interrupting and isolating switch
US2897322A (en) * 1956-04-24 1959-07-28 Era Patents Ltd Electrical switching apparatus
US2889424A (en) * 1957-12-31 1959-06-02 Bell Telephone Labor Inc Relay
US3025375A (en) * 1960-04-04 1962-03-13 Gen Electric Electric circuit breaker having a sealed interrupting unit
US3163735A (en) * 1962-06-29 1964-12-29 Gen Electric Electric circuit breaker with sealed interrupting unit

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397293A (en) * 1965-08-13 1968-08-13 Gen Electric Metal-clad switchgear employing vacuum type circuit interrupters
US3526735A (en) * 1966-06-15 1970-09-01 Mc Graw Edison Co Repeating circuit interrupter
US3603753A (en) * 1968-02-28 1971-09-07 Westinghouse Electric Corp Metalclad switchgear using vacuum interrupter elements
US3670123A (en) * 1971-04-29 1972-06-13 Joslyn Mfg & Supply Co Multi-point to common point dead tank switch having vacuum insulated contacts and vacuum insulated terminals
JPS4729550U (en, 2012) * 1971-04-30 1972-12-04
US3895199A (en) * 1972-03-06 1975-07-15 Siemens Ag Multi-pole vacuum switching apparatus
US3784774A (en) * 1972-08-21 1974-01-08 Ite Imperial Corp Vacuum circuit breaker current transfer and actuation
US3882751A (en) * 1972-12-14 1975-05-13 Nippon Musical Instruments Mfg Electronic musical instrument employing waveshape memories
US4950854A (en) * 1989-10-31 1990-08-21 Electric Services, Inc. Vacuum operated circuit breaker apparatus for replacing air-magnetic circuit breaker assemblies
FR2689305A1 (fr) * 1992-03-27 1993-10-01 Alsthom Gec Module de coupure triphase et application notamment à un disjoncteur moyenne tension debrochable.
EP1158555A3 (en) * 2000-05-26 2003-09-17 Mitsubishi Denki Kabushiki Kaisha Vacuum circuit interrupter

Also Published As

Publication number Publication date
BE645847A (en, 2012) 1964-07-16
GB997126A (en) 1965-06-30
FR1389898A (fr) 1965-02-19
CH415796A (de) 1966-06-30

Similar Documents

Publication Publication Date Title
US3671696A (en) Vacuum interrupter shunted with mechanical switch
US3305657A (en) Circuit breaker for high power, high voltage networks
CN102592879B (zh) 开关单元及开关机构
US3891862A (en) Compact unit breaker
US3235774A (en) Metalclad switchgear in double-unit construction
US4211902A (en) Apparatus for phase switching in pumping-up power station
US3903387A (en) Gas-insulated switching apparatus
JP2854744B2 (ja) 金属閉鎖形スイッチギヤ
US3891896A (en) Vacuum circuit interrupter
SE440573B (sv) Kapslat stellverk
WO2003088441A1 (en) Metal closed type distributor
JPH0626444B2 (ja) 小容量配電用変電塔
US2163558A (en) Circuit breaker
ES330091A1 (es) Un aparato de distribucion electrico para gobernar un circuito de corriente alterna trifasica.
US2913557A (en) Circuit interrupter
CN111276896A (zh) 三气室充气式高压开关
US2080226A (en) Electric switch gear
CN102360986A (zh) 一种固封全真空开关装置
CN206865005U (zh) 充气式交流金属封闭开关设备
US3303309A (en) Series connected switches of different types
US2385658A (en) Circuit-interrupting device
US3614358A (en) Oil immersed snap action loadbreak switch
GB2083951A (en) High voltage electrical equipment
US1709780A (en) Switch gear
US3242276A (en) Electric switchgear