US2988605A - Circuit breaker apparatus - Google Patents

Circuit breaker apparatus Download PDF

Info

Publication number
US2988605A
US2988605A US833197A US83319759A US2988605A US 2988605 A US2988605 A US 2988605A US 833197 A US833197 A US 833197A US 83319759 A US83319759 A US 83319759A US 2988605 A US2988605 A US 2988605A
Authority
US
United States
Prior art keywords
circuit breaker
conductors
contact
roller contacts
roller
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
US833197A
Other languages
English (en)
Inventor
Willem Van Gent
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.)
ELECTROTECHNISCHE IND VOORHEEN
N V Electrotechnische Industrie Voorheen Willem Smit & Co
Original Assignee
ELECTROTECHNISCHE IND VOORHEEN
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 ELECTROTECHNISCHE IND VOORHEEN filed Critical ELECTROTECHNISCHE IND VOORHEEN
Application granted granted Critical
Publication of US2988605A publication Critical patent/US2988605A/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
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • 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
    • H01H33/002—Very heavy-current switches

Definitions

  • This invention relates to circuit breakers in general and in particular to circuit breakers for large electric currents in which ends of two conductors are conductively connected by means of one or more rollers or roller contacts of conductive material in the closed position of the circuit.
  • the rollers or roller contacts are pivoted on an offset shaft which is submitted to the pressure of a spring in a direction perpendicular to the direction of the shaft for producing the contact pressure between the rollers and the ends of the two conductors.
  • the circuit breaker has a rotatable control shaft for controlling the movement of the rollers or roller contacts.
  • the conductors which are arranged for connection by the roller or rollers may each be provided with a contact surface to facilitate conduction between the conductor and the roller or rollers.
  • Circuit breakers of the aforesaid kind will hereinafter be referred to as circuit breakers of the kind set forth.
  • Prior art circuit breakers of the kind set forth are generally known and provided with only one set of roller contacts.
  • a circuit breaker of the kind set forth two contact surfaces in an advantageously substantially mutually perpendicular spatial relation adapted to be operatively electrically connected by a first roller or set of roller contacts.
  • a second roller or set of roller contacts controlled by the same control shaft as the first roller is provided for electrically connecting two further contact surfaces also advantageously arranged in substantially mutually perpendicular spatial relation.
  • One of the first mentioned contact surfaces and one of said further contact surfaces being provided on one and the same conductor.
  • Said conductor is advantageously substantially strip shaped, its contact surfaces being positioned substantially on one of its large boundary surfaces.
  • each substantially strip shaped conductors each provided with a contact surface at each end for the roller contacts are arranged substantially according to the sides of a square.
  • two substantially parallel conductors may be connected by a substantially strip shaped metallic connecting member, extending in a direction plane which is perpendicular to the axial direction of the control shaft, said connecting element being connected to a long, small boundary surface or edge of each of ted States Patent 0 F Patented June 13, 1961 'ice said conductors.
  • the circuit breaker may have two connecting elements of this kind, in which case the control shaft may preferably be supported in an insulating Way in both strip shaped connecting members, or the connecting member may be journaled on said control shaft.
  • one of two adjacent strip shaped conductors which cannot be connected by a roller contact directly, is provided with a fixed contact piece, whereas the other of said two adjacent conductors is provided with a movable contact piece arranged for cooperation with said fixed contact piece.
  • the control shaft is provided with a cam adapted to control said movable contact piece.
  • the movable contact piece is arranged on a tumbler which is provided with two cam rollers arranged for mechanical cooperation with the cam attached to the control shaft.
  • Limiting members may be provided to determine the extreme positions of the control shaft.
  • FIGURES 1 and 2 show schematically two different positions of a circuit breaker in a direct current system, said circuit breaker being arranged for putting out of or into operation a machine;
  • FIGURES 3 and 4 show a side view of a circuit breaker in accordance with the invention, which is adapted to be used in a circuit according to the FIG- URES 1 and 2, the circuit breaker position shown in these figures corresponding to the circuit positions schematically represented in the FIGURES 1 and 2, respectively;
  • FIGURE 5 shows a side view of a circuit breaker in accordance with the invention, which is adapted to break a current at full load;
  • FIGURE 6 shows a side view of a circuit breaker in accordance with the invention, adapted for very heavy currents, which circuit breaker, however, preferably should be opened only when the current is zero or very small.
  • the numerals 10 and 11 indicate two conductors which belong to a circuit of a direct current system, in which current may be put several electrical machines, such as the direct current machine 12.
  • a switch 13 is closed, whereas a switch 14, arranged for connecting the conductors 15 and 16 connected to the machine 12, is also closed.
  • a switch 17 is provided between the conductors 10 and 15 and a switch 13 is provided between the conductors 11 and 16.
  • switches 17 and 18 are to be closed, while the machine 12 is running in no-load condition and the switches 13 and 14 are still closed. Thereafter, sequentially first the switch 13 and then the switch 14 should be opened.
  • the machine 12 will be part of the circuit as shown in FIGURE 2.
  • the switch or circuit breaker shown in the FIGURES 3 and 4 in two different working positions, has four fixedly arranged conductor blocks or strips 20, 21, 22 and 23, which correspond with the conductors 10, 11, 15 and 16, respectively in the FIGURES 1 and 2.
  • the blocks 20 and 21 are arranged to be conductively connected one to the other by a set of conductive roller contacts 24 pivotally mounted on an offset shaft 25 and pressed against the contact surfaces 28 and 29 of the blocks 20 and 21 by means of a spring 26, which in turn is mounted around 3 a leading pin 27.
  • the blocks are provided with inserts 30 and 31 of a highly conductive contact material, e.g. silver, etc.
  • the roller contacts 24 also can be made of a highly conductive contact material, at least on the circumference of the cylinder.
  • the offset shaft 25 is mounted in the thickened end or spring seat 32 of the leading pin 27 against which end or seat is resting one end of the spring 2s.
  • the other end of the pin 27 is slidably mounted or arranged for sliding in a leading block or guide 33 and is provided with a retainer nut 34.
  • the leading block or guide 33 is provided with a mounting pin 35, which is arranged for rotation, i.e. pivotally mounted, in an insulating disc 36.
  • the disc 36 and a cam 37 are rigidly connected to or mounted on a rotatably arranged control shaft 38.
  • the cam 37 is arranged for cooperation with a tumbler or cam follower 39 rotatably mounted on a fixed shaft 40.
  • the tumbler or cam follower 33 carries a contact piece 41, which is electrically connected to the conductor block 23 by means of a resilient conductor and which rests against a contact piece 42 on the block 22.
  • the block 29 is electrically connected to the block 21 by means of the set of roller contacts 24 and the block 22 is electrically connected to the block 23 by means of the contact pieces 41 and 42.
  • This arrangement corresponds to the closed position of the switches 13 and 14 in FIG- URE 1.
  • the disc 36 In the same manner as it is carrying the leading block or guide 33 the disc 36 carries two further leading blocks or guides 43 and 44, and, in the same manner as the leading block 33 guides the set of roller contacts 24, the leading blocks 43 and 44 guide the sets of roller contacts 45 and 46, respectively.
  • the roller contacts 45 and 46 In the position shown in FIGURE 1 the roller contacts 45 and 46 are free from the blocks 20, 22 and 21, 23, respectively.
  • the roller contacts 45 and 46 are first pressed against the contact surfaces of the blocks 20, 22 and 21, 23, respectively, then the roller contacts 24 are withdrawn and finally the contact piece 41 is moved away from the contact piece 42. A current flowing through these contact pieces may give rise to an arc, which can be extinguished in any manner known to those skilled in the art.
  • Two contact surfaces such as 28 and 29, cooperating with one set of roller contacts such as the set of roller contacts 24, are in a substantially perpendicular spatial relation one with regard to the other.
  • a bearing stop or support member such as the member 47, is present, which member is adapted to support the roller contacts when the same are not pressed against the contact surfaces.
  • the angle over which the control shaft 38 is rotatable is limited by members not shown in the drawing.
  • the two positions of the shaft 38 shown in the FIGURES 3 and 4 are the two extreme positions of the same.
  • the shaft 38 may be rotated manually or by other means well known to those skilled in the art.
  • FIGURE A second embodiment of the circuit breaker in accordance with the teachings of this invention is shown in FIGURE and is provided with blocks 50, 51, 52 and 53 which substantially correspond with the blocks 20, 21, 22 and 23 in FIGURE 3.
  • the blocks 50 and 53 are, however, connected by a heavy metal strip 54. As shown in FIGURE 5 these three elements may constitute one single casting. In the same way the blocks 51 and 52 are connected by a strip of metal 55.
  • the strips 54 and 55 are separated by a distance in the axial direction of the control shaft 56 that between these strips there is room for a disc 57 corresponding to the disc 36 in FIGURE 3.
  • the disc 57 carries members corresponding to the members carried by the disc 36 and particularly it carries sets of roller contacts 53, 59 and 60 and a cam 61, the latter being adapted to operatively close the contact piece 62 against the contact piece 63 in a first position and, in another position keeping the contact piece 62 at a distance from the contact piece 63 in the same manner as shown in FIGURE 3 wherein the cam 37 controls the contact piece 41.
  • the guide or leading blocks of the apparatus in FIGURE 5 are rotatably mounted on the periphery of the disc 57 at diflerent points than shown in FIGURE 3 so that rotation of the control shaft 56 in a certain direction causes roller contacts 53, 59 and 60 to meet the blocks 50, 51, 52 and 53 substantially at the same moment.
  • the roller contacts Upon rotation of the control shaft 56 in the opposite direction the roller contacts will leave the contact surfaces of the blocks first and thereafter the contact piece 62 will move, so that only the contact pieces 62 and 63 are interrupting a current of considerable size.
  • the strips 54 and 55 are mounted upon or are supporting the shaft 56 in a manner so that each element is insulated from the other.
  • the strip 55 is mounted on the shaft 56 with an insulating bushing 64.
  • FIGURE 6 A third embodiment of the circuit breaker according to the teachings of this invention is shown in FIGURE 6 and varies from the embodiment shown in FIGURE 5 only in the use of four sets of roller contacts 66, 67, 68 and 69. These sets of roller contacts are arranged as shown in the manner described above for connecting electrically the blocks 70, 71, 72 and 73 pairwise near the angular points of a square. Opposite blocks are already connected by the strips 74 and 75. Upon rotation of the control shaft 76 all the sets of roller contacts will come into contact with the contact surfaces on the adjacent blocks substantially at the same moment.
  • the circuit breaker shown in FIGURE 6 is adapted to carry very heavy currents, however, it is not as satisfactory for the breaking of a circuit under conditions in which a considerable volt age might appear as the apparatus shown in FIGURES 3, 4 and 5.
  • circuit breaker apparatus which is rugged, reliable and yet simple in design and construction. Further, the circuit breaker apparatus described herein allows multiple, heavy duty switching without occupying a large area.
  • a circuit breaker in combination; four substantially strip shaped conductors arranged substantially in a square; each conductor having at least one contact surface arranged in a substantially mutually perpendicular spatial relation with a contact surface of one of the other of said conductors; a plurality of roller contacts adapted to selectively conductively connect predetermined pairs of said conductors at said contact surfaces; each roller contact being mounted on an offset shaft; a spring for each roller contact adapted to apply pressure to said shaft in a direction perpendicular to the axial direction of said shaft to provide contact pressure; a rotatable control shaft adapted to control the movement of said roller contacts.
  • a circuit breaker according to claim 1 wherein two substantially parallel conductors are mutually connected by a substantially strip shaped connecting member.
  • a circuit breaker according to claim 1 wherein each pair of parallel conductors comprising the sides of said square is mutually connected by a substantially strip shaped connecting member.
  • each conductor having at least one contact surface arranged in a substantially mutually perpendicular spatial relation with a contact surface of one of the other of said conductors; a plurality of roller contacts adapted to selectively conductively connect predetermined pairs of said conductors at said contact surfaces; each roller contact being mounted on an ofiset shaft; a spring for each roller contact adapted to apply pressure to said shaft in a direc tion perpendicular to the axial direction of said shaft to provide cont-act pressure; one of two adjacent conductors of said four conductors having a fixed contact piece; the other of said two adjacent conductors having a movable contact piece; and a cam mounted on said control shaft adapted to control said movable contact piece.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Breakers (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US833197A 1958-08-18 1959-08-12 Circuit breaker apparatus Expired - Lifetime US2988605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL882237X 1958-08-18

Publications (1)

Publication Number Publication Date
US2988605A true US2988605A (en) 1961-06-13

Family

ID=19853550

Family Applications (1)

Application Number Title Priority Date Filing Date
US833197A Expired - Lifetime US2988605A (en) 1958-08-18 1959-08-12 Circuit breaker apparatus

Country Status (5)

Country Link
US (1) US2988605A (enrdf_load_stackoverflow)
DE (1) DE1116298B (enrdf_load_stackoverflow)
FR (1) FR1232215A (enrdf_load_stackoverflow)
GB (1) GB882237A (enrdf_load_stackoverflow)
NL (1) NL104798C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953695A (en) * 1973-07-26 1976-04-27 Osip Borisovich Bron Heavy current switch
EP0029467A1 (fr) * 1979-11-21 1981-06-03 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Appareil électrique comprenant une série de prises de tension et un équipage sélecteur mobile
US20140231230A1 (en) * 2011-06-15 2014-08-21 Mersen France Sb Sas Short-circuiting switch of an electrical energy production installation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US500629A (en) * 1893-07-04 Electric switch
US1215423A (en) * 1915-08-16 1917-02-13 Clarence Long C Current-limiter.
US1223987A (en) * 1916-02-14 1917-04-24 William Archibald Kirkland Cut-out switch for series loops.
US1357726A (en) * 1919-01-16 1920-11-02 Gen Electric Electric switch
US1916565A (en) * 1931-12-07 1933-07-04 Cutler Hammer Inc Circuit controlling device
US2743338A (en) * 1952-10-27 1956-04-24 Ite Circuit Breaker Ltd Low voltage, high current switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE916897C (de) * 1939-01-12 1954-08-19 Siemens Ag Kontaktvorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US500629A (en) * 1893-07-04 Electric switch
US1215423A (en) * 1915-08-16 1917-02-13 Clarence Long C Current-limiter.
US1223987A (en) * 1916-02-14 1917-04-24 William Archibald Kirkland Cut-out switch for series loops.
US1357726A (en) * 1919-01-16 1920-11-02 Gen Electric Electric switch
US1916565A (en) * 1931-12-07 1933-07-04 Cutler Hammer Inc Circuit controlling device
US2743338A (en) * 1952-10-27 1956-04-24 Ite Circuit Breaker Ltd Low voltage, high current switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3953695A (en) * 1973-07-26 1976-04-27 Osip Borisovich Bron Heavy current switch
EP0029467A1 (fr) * 1979-11-21 1981-06-03 ATELIERS DE CONSTRUCTIONS ELECTRIQUES DE CHARLEROI (ACEC) Société Anonyme Appareil électrique comprenant une série de prises de tension et un équipage sélecteur mobile
US4356359A (en) * 1979-11-21 1982-10-26 Ateliers De Constructions Electriques De Charleroi Electrical apparatus comprising a series of current taps and variable switching gear
US20140231230A1 (en) * 2011-06-15 2014-08-21 Mersen France Sb Sas Short-circuiting switch of an electrical energy production installation

Also Published As

Publication number Publication date
FR1232215A (fr) 1960-10-06
NL230607A (enrdf_load_stackoverflow) 1962-12-17
DE1116298B (de) 1961-11-02
NL104798C (enrdf_load_stackoverflow) 1963-05-15
GB882237A (en) 1961-11-15

Similar Documents

Publication Publication Date Title
US3936782A (en) Automatic transfer switch
US3824359A (en) Vacuum loadbreak switch
US2951916A (en) Electric contact device
GB1190430A (en) Improvements in Current Carrying Contact Arm Pivot Assembly
US2988605A (en) Circuit breaker apparatus
US2227160A (en) Electric switch
US2709739A (en) Center break disconnect switch contacts
US3032627A (en) Electrical switch
US3333079A (en) Switch operator comprising a rotatable switch actuator
US2765380A (en) High current disconnecting switch
US2527924A (en) Switch construction
US4168407A (en) Electrical switch assembly including a separate interrupter switch
US3258546A (en) Transfer switch with movable contact toggle mechanism for tapped regulating transformers
US3588406A (en) High voltage beaver tail type switch with preinsertion resistor
US3364324A (en) Multiple main and auxiliary contact arrangement for high-power switch
US2849578A (en) High voltage switch
US2947838A (en) Snap action reversing switch for load tap changing transformer
US2184767A (en) Electric switch
US2866043A (en) Circuit breaker
US2824936A (en) Combined dual motion disconnect switch and interrupter attachment
US2235253A (en) High voltage disconnecting switch
US3614358A (en) Oil immersed snap action loadbreak switch
US3812309A (en) Electrical switch with high pressure contacts
US4348558A (en) Diverter switch for an on-load transformer tap changer
US3061702A (en) Movable switch member