US3017480A - High-voltage circuit-breaker - Google Patents

High-voltage circuit-breaker Download PDF

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Publication number
US3017480A
US3017480A US834988A US83498859A US3017480A US 3017480 A US3017480 A US 3017480A US 834988 A US834988 A US 834988A US 83498859 A US83498859 A US 83498859A US 3017480 A US3017480 A US 3017480A
Authority
US
United States
Prior art keywords
contact
breaker
circuit
sleeve
stationary
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
US834988A
Other languages
English (en)
Inventor
Klaassen Antonius Canisius
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.)
Hazemeijer BV
Original Assignee
Hazemeijer BV
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 Hazemeijer BV filed Critical Hazemeijer BV
Application granted granted Critical
Publication of US3017480A publication Critical patent/US3017480A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D3/00—Wagons or vans
    • B61D3/02—Wagons or vans with multiple deck arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D3/00—Wagons or vans
    • B61D3/16—Wagons or vans adapted for carrying special loads
    • B61D3/18—Wagons or vans adapted for carrying special loads for vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
    • H01H3/30—Power arrangements internal to the switch for operating the driving mechanism using spring motor
    • H01H3/3052—Linear spring motors
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • 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
    • H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing
    • H01H9/085—Arrangements to facilitate replacement of a switch, e.g. cartridge housing contact separation effected by removing contact carrying element

Definitions

  • the invention relates to a high-voltage circuit-breaker for a limited cirouit-breaking capacity, having as movable contact at least one contact pin, which in the closed condition of the circuit-breaker lies in a contact chamber of insulating material in which the stationary contact is accommodated, a conductive sleeve being associated with 'the contact pin, which in the closed condition of the circuit-breaker surrounds the outside of the contact chamber, engages the stationary contact, and is coupled with the contact pin so as to be relatively movable in such a way that when the circuit-breaker is opened, the conductive sleeve is disengaged from the stationary contact prior to the contact pin.
  • a circuit-breaker of such a kind is known from the British patent specification No. 480,377, FIGURE 1 and the US. patent specification No. 2,455,998, FIGURE 3.
  • the advantages to be named hereinafter are not mentioned in these references, nor do they contain any indication in this direction.
  • the advantage of the said conductive sleeve is that when the circuit-breaker is closed, there will be no electric field in the space between the contact pin and the material of the contact chamber, owing to which in the said space ionization is also prevented, which has the favourable consequence that corrosion of the contact pin and the material of the contact chamber is avoided.
  • the conductive sleeve serves as a current path connected in parallel with the contact pin, wherein the current which can be permanently carried through the circuit-breaker becomes of. approximately the same magnitude as the maximum current that can be switched by the contact pin (in particular: switched in, because the striking discovery has been made that the maximum current-closing intensity can be appreciably higher than the maximum current-interrupting intensity).
  • pre-ignition can no longer occur between the contact pin and the stationary contact, because previously the contact pin has entered into electric connection with the stationary contact via the conductive sleeve.
  • FIGURE 1 shows the circuit-breaker at the beginning of the closing movement, FIGURE 2 in closed condition, and FIGURE 3 during the opening movement.
  • the circuit-breaker consists of a stationary part lying at the bottom and a movable part lying at the top. These will be discussed in succession.
  • the stationary part comprises two stationary contacts 1. Each of these consists of a central portion 3 and an outer portion 4. Between these two portions a cylindrical insulating contact chamber 5 is present.
  • the two stationary contacts 1 and the two contact chambers 5 are jointly surrounded by a sheath 6 which, like the part in which the stationary contacts 1 are accommodated, is made of an electrically high-grade insulating material, e.g. casting resin.
  • Lying between the two stationary contacts 1 and the two contact chambers 5, and incorporated likewise in the insulating material, is a permanent magnet system consisting of two paramagnetic pole plates 7, separated by a number of permanent magnets 9 polarized in the same direction. At the top the pole plates 7 extend slightly beyond the adjacent insulating material. Owing to this, a paramagnetic aramature plate 13 to be discussed presently can be brought directly into contact with the pole plates 7 and 8.
  • the movable part of the circuit-breaker consists of a hood 10 of insulating material, eg. casting resin, with a handle 11.
  • the dimensions of the hood are such that it can be pushed with a free fit on the sheath 6 of the stationary part.
  • each metal sleeve 12 is provided on the side turned towards the centre-line of the circuit-breaker with a fairly wide axial notch over about one half of its length, reckoned from the handle 11.
  • an armature plate 13 Extending between the twosleeves 12 and at right-angles thereto is an armature plate 13 of paramagnetic material. This can be displaced in the longitudinal direction of the sleeves 12 relative to said sleeves, and thus moves through the axial notches in said sleeves.
  • each of the sleeves 12 is provided on the inside with a flange 8.
  • each of the ends of the armature plate 13 is forced in the direction of the handle 11.
  • the armature plate 13 is supported against a forked internal projection 15 of the hood 10.
  • the armature plate 13 supports a U-shaped movable switching member 16, each of whose ends is formed by one of the movable contact pins 17.
  • the U-shaped switching member 16 can be displaced relative to the armature plate 13 in the direction of the handle 11.
  • the central part of the switching member 16 is held resiliently against the armature plate; in fact, around each of the legs of the switching member 16, i.e. on each of the contact pins 17, is fitted a helical spring 18, which at one end rests under pressure against the armature plate 13 and at the other end against an external flange 19 of the respective contact pin 17.
  • FIGURE 3 serves to illustrate the opening of the circuit-breaker.
  • the opening is elfected by pulling the handle 11.
  • the hood 10 then moves backward and each of the metal sleeves 12 is taken along, so that it is disengaged from the outer portion 4 of the respective stationary contact.
  • the armature plate 13, however, is held by the pole plates 7.
  • the circuit-breaking spring 14- is compressed.
  • the compression of this circuit-breaking spring 14 continues to increase until, as shown at A, the (non-notched) part of the metal sleeve 12 comes into contact with the armature plate 13.
  • the pull exerted on the handle 11 is then transmitted direct by the sleeve 12'to the armature plate 13. The result is that the armature plate 13 is pulled off the pole plates 7.
  • the two contact pins 17 may also be connected with each other by an altogether difierently constructed conductor, e.g. a fuse.
  • the movable switching member is U-shaped and to serve for double interruption and closing respectively of the circuit.
  • the invention can in principle be applied equally well.
  • a high voltage circuit breaker comprising stationary contact means having an inner portion and an outer portion with :an insulating member separating the ends of said portions, insulating means movably mounted relative to said contact means, a conducting sleeve mounted on said insulating means in a position to engage said outer portion of said stationary contact, a switching member slidably mounted relative to said sleeve in a position: to engage said inner portion of said stationary contact, and means innerconnecting said sleeve and said switch-' ing member whereby said conducting sleeve makes con-- tact with said outer portion before said switching member makes contact with said inner portion during theclosing of said switch and wherein said switching member disengages said inner portion after said sleeve disengages said outer portion during the opening of said switch.
  • a circuit breaker according to claim 1 further including a plate member slidably mounted relative to said sleeve and wherein said means connected to said switching member comprises spring means and connecting means on said sleeve, said spring means being compressed between said plate member and said connecting means.
  • a circuit breaker according to claim 2 further comprising second spring means, connecting means on said c switching member, said second spring means being compressed between said plate member and said last-mentioned connecting means, magnet means positioned to apply a holding force to said plate member when said switch is in a closed position until said holding force is exceeded by the force of said first-mentioned spring means, wherein upon movement of said sleeve away from said stationary contact, said switching member disengages said inner portion only after said sleeve disengages said outer portion.
  • a high voltage switch comprising an insulating support, a contact mounted on said support and having inner and outer portions projecting therefrom and separated by an insulating member, insulating means movably mounted relative to said support, a conducting sleeve secured to said insulating means and positioned to engage said outer portion, a switching member having a portion slidably mounted within said sleeve, a plate member having a portion slidably mounted relative to said sleeve and positioned to engage a portion of said sleeve, connecting means on the inner surface of said sleeve, first spring means compressed between said connecting means and said plate member and urging said plate member in a first axial direction relative to said sleeve, and second spring means connected to said switching member and compressed between said switching member and said plate member, urging said switching member in the opposite axial direction to that of said plate member, whereby said conducting sleeve makes contact with said outer portion before said switching member makes contact with said inner portion during the closing of said switch and wherein said
  • a high voltage circuit breaker comprising stationary contact means mounted on an insulation support, including a pair of contacts, each having inner and outer portions and an insulating member separating said inner and outer portion, insulating hood means movably mounted relative to .said stationary contact means, a pair of conducting sleeves mounted in said hood means in a position to engage respective ones of said outer portions, a switching member slidably mounted relative to said sleeves in a position to engage the inner portions of said stationary contact means, and means interconnecting said switching member and said conducting sleeves whereby said conducting sleeves make contact with said outer portions before said switching member makes contact with said inner portion during the closing of said switch and wherein said switching member engages said inner portions after said sleeves disengage said outer portions during the opening of said switch.
  • a high voltage circuit breaker wherein said switching member is a U-shaped member including a pair of arms, one arm of said U-shaped member being slidably mounted axially of each of said sleeves and wherein said means for retaining said switching member in a predetermined position includes plate means slidably mounted relative to said sleeves, first spring means between each of said sleeves and said plate means and second spring means compressed between said plate means and said contact member, whereby upon movement of the said insulating hood means away from said stationary. contact means, said switching member disengages said inner contact portion after said conducting sleeves disengage said outer c-ontact portions.
  • a high voltage circuit breaker according to claim 7, further comprising magnetic means connected to said insulating support, positioned to exert a holding force on said plate means when said switch is closed, which holding force is overcome by said first spring means during the opening of said switch delaying device to prevent movement of said contact member until after said sleeves have disengaged said outer portions during the opening of said switch.
  • said first spring means comprises a pair of helical springs, one mounted in each of said sleeves and compressed between said sleeve and said plate member, and wherein said second spring means includes a pair of helical springs, each encircling said switching member and compressed bet-ween said switching member and said plate member.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
US834988A 1958-08-27 1959-08-20 High-voltage circuit-breaker Expired - Lifetime US3017480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL230886 1958-08-27

Publications (1)

Publication Number Publication Date
US3017480A true US3017480A (en) 1962-01-16

Family

ID=19751321

Family Applications (1)

Application Number Title Priority Date Filing Date
US834988A Expired - Lifetime US3017480A (en) 1958-08-27 1959-08-20 High-voltage circuit-breaker

Country Status (8)

Country Link
US (1) US3017480A (nl)
BE (1) BE581746A (nl)
CH (1) CH373798A (nl)
DE (1) DE1144363B (nl)
ES (1) ES251682A1 (nl)
FR (1) FR1236689A (nl)
GB (1) GB925401A (nl)
NL (2) NL230886A (nl)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202783A (en) * 1961-02-27 1965-08-24 Hazemeijer Co Switch with pole plates having a separation of non-magnetizable material
US3244843A (en) * 1963-10-16 1966-04-05 Jennings Radio Mfg Corp Arc-controlling auxiliary contact assembly for electric switches
US3291947A (en) * 1964-06-12 1966-12-13 Westinghouse Electric Corp Interrupting structures for compressedgas circuit interrupters having double-break hollow rotative moving contact-arm assembly
US3446928A (en) * 1965-10-20 1969-05-27 Allis Chalmers Mfg Co Interrupting device having u-shaped parallel current paths
US3555223A (en) * 1968-01-03 1971-01-12 English Electric Co Ltd Vacuum circuit interrupters with co-axial movable main and movable auxillary contacts
US3778573A (en) * 1972-06-23 1973-12-11 Westinghouse Electric Corp Vacuum circuit interrupter having improved contact structure
US3814882A (en) * 1973-07-25 1974-06-04 Westinghouse Electric Corp Hybrid circuit interrupter
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
US4041262A (en) * 1974-09-02 1977-08-09 Sprecher & Schuh Ag Contact arrangement for an electrical switch, especially for a vacuum switch
US4153827A (en) * 1976-01-26 1979-05-08 Merlin Gerin Magnetic blow-out arc extinguishing device
US4250363A (en) * 1978-12-06 1981-02-10 Electric Power Research Institute, Inc. Electrical circuit breaking device and method
US4538039A (en) * 1982-04-19 1985-08-27 Hitachi, Ltd. Composite circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2547107B1 (fr) * 1983-06-06 1986-05-09 Merlin Gerin Sectionneur d'isolement blinde

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455998A (en) * 1943-12-20 1948-12-14 Electrical Eng Equipment Co Electrical load breaking device
US2761040A (en) * 1954-05-17 1956-08-28 Bbc Brown Boveri & Cie Lever-actuated switch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE603926C (de) * 1930-04-06 1934-10-10 Siemens Schuckertwerke Akt Ges Schalter mit stromleitender Schaltfluessigkeit
DE604817C (de) * 1930-07-19 1934-10-29 Siemens Schuckertwerke Akt Ges Fluessigkeitsschalter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455998A (en) * 1943-12-20 1948-12-14 Electrical Eng Equipment Co Electrical load breaking device
US2761040A (en) * 1954-05-17 1956-08-28 Bbc Brown Boveri & Cie Lever-actuated switch

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202783A (en) * 1961-02-27 1965-08-24 Hazemeijer Co Switch with pole plates having a separation of non-magnetizable material
US3244843A (en) * 1963-10-16 1966-04-05 Jennings Radio Mfg Corp Arc-controlling auxiliary contact assembly for electric switches
US3291947A (en) * 1964-06-12 1966-12-13 Westinghouse Electric Corp Interrupting structures for compressedgas circuit interrupters having double-break hollow rotative moving contact-arm assembly
US3446928A (en) * 1965-10-20 1969-05-27 Allis Chalmers Mfg Co Interrupting device having u-shaped parallel current paths
US3555223A (en) * 1968-01-03 1971-01-12 English Electric Co Ltd Vacuum circuit interrupters with co-axial movable main and movable auxillary contacts
US3778573A (en) * 1972-06-23 1973-12-11 Westinghouse Electric Corp Vacuum circuit interrupter having improved contact structure
US3814882A (en) * 1973-07-25 1974-06-04 Westinghouse Electric Corp Hybrid circuit interrupter
US4041262A (en) * 1974-09-02 1977-08-09 Sprecher & Schuh Ag Contact arrangement for an electrical switch, especially for a vacuum switch
FR2285700A1 (fr) * 1974-09-19 1976-04-16 Alsthom Cgee Dispositif de coupure
US4153827A (en) * 1976-01-26 1979-05-08 Merlin Gerin Magnetic blow-out arc extinguishing device
US4250363A (en) * 1978-12-06 1981-02-10 Electric Power Research Institute, Inc. Electrical circuit breaking device and method
US4538039A (en) * 1982-04-19 1985-08-27 Hitachi, Ltd. Composite circuit breaker

Also Published As

Publication number Publication date
GB925401A (en) 1963-05-08
BE581746A (nl) 1959-12-16
ES251682A1 (es) 1960-01-16
FR1236689A (fr) 1960-07-22
DE1144363B (de) 1963-02-28
NL104518C (nl)
NL230886A (nl)
CH373798A (de) 1963-12-15

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