US3205333A - Circuit-breaking device for alternating current arranged for the compensation of electro-dynamic forces - Google Patents

Circuit-breaking device for alternating current arranged for the compensation of electro-dynamic forces Download PDF

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Publication number
US3205333A
US3205333A US209168A US20916862A US3205333A US 3205333 A US3205333 A US 3205333A US 209168 A US209168 A US 209168A US 20916862 A US20916862 A US 20916862A US 3205333 A US3205333 A US 3205333A
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US
United States
Prior art keywords
circuit
spring
finger
closed position
fingers
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
US209168A
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English (en)
Inventor
Bonnefois Jean
Caillard Jacques
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.)
Alcatel Lucent SAS
Original Assignee
Compagnie Generale dElectricite SA
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 Compagnie Generale dElectricite SA filed Critical Compagnie Generale dElectricite SA
Application granted granted Critical
Publication of US3205333A publication Critical patent/US3205333A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/40—Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force

Definitions

  • the compensating device for the electro-dynamic forces bears upon the general mechanism that serves for controlling the closing and opening of the apparatus, and all the members of this mechanism, as well as the frame, have to be so designed as to be able to resist the substantial forces transmitted.
  • the present invention relates to the construction of apparatus in which the electro-dynamic forces are used strictly for reinforcing the contact pressure without involving supplementary reactions upon the mechanism, and in which the arrangement does not permit the separation of the contacts except in the neighbourhood of a passage to zero of the fault current.
  • circuit-breaker for interrupting alternating current, so arranged as to compensate for the electrodynamic forces, and characterised by the feature that the stationary contact is double-faced, so as to be gripped between two movable contacts, which are substantially parallel to one another when in a closed position, and are each mounted at the end of a conducting finger pivoting about an axis, these fingers together constituting a gripper, the hinge of which forms the inlet or outlet for current, the two fingers of the gripper being mechanically connected by an articulation subjected to the action of springs in such a manner as to eifect the closing of the gripper even in the absence of current, this closing pressure being reinforced by the electro-dynamic forces due to the passage of the current.
  • Another object of the invention is to provide circuitbreaker equipped for the interruption of large currents, and comprising also spark-extinguisher or arc-rupturing means constituted by a third finger mounted on a pivot and subjected to contact pressure against that finger of the gripper which opens its contact on release after that of the other finger of the gripper, under the action of a spring mounted upon a rod with an abutment at atfixed point, in such a way that upon release, the spark-extinguishing finger opens its contact after those of the fingers of the interrupting gripper.
  • FIGURE 1 is a diagrammatic view of the switch, equipped with a spark-arresting or arcrupturing finger and assumed to be maintained in the engaged position by a locking member representing the general mechanism.
  • FIGURE 2 is a view of the switch of FIGURE 1 in the released position.
  • the circuit-breaking gripper constituted by fingers 3 and 4 is mounted between a conductor 20 and a conductor 21.
  • the movable conducting finger 3 is articulated upon a stationary pivot 16, and the movable conducting finger 4 upon a stationary pivot 17.
  • T h double contact provided upon the conductor 20 is denoted by 1 and 2, and at the hinge of the gripper the fingers 3 and 4 are connected to the conductor 21 by a flexible conducting braid 23.
  • a stop 15 is provided for the purpose of limiting the opening movement of the finger 3.
  • the mechanism connecting the two fingers of the gripper comprises a lever 7, which pivots about a stationary fulcrum 28. One end of this lever is connected to the finger 3 at 24 through the medium of a connecting-rod 14, and its other end is connected to the finger 4 at 25 through the medium of a connecting-rod 26.
  • the finger 3, connected at 30 to an arm 27, is maintained in a closed position by a locking member consisting of a lever 13 pivoting about a stationary fulcrum 18, and a lock of catch 22.
  • the mechanical pressure upon the contacts is furnished by the three springs 12, 5 and 9, in compression when the general mechanism is maintained in the engaged position by the locking member 22.
  • the spring 12 is mounted at the free end of the arm 27, and is kept in compression by the lever 13 and the locking member 22. This spring can extend, upon release, until a stop 29 comes into contact with the arm 13.
  • the spring 5 is mounted in compression upon the rod 26, and its expansion upon release is limited by the rod 7 coming into contact with an abutment 6 at the end of the rod 26.
  • the equipment of the switch with a view to the interruption of large currents is constituted by a spark-arresting or arc-rupturing finger 19, articulated about a pivot 31 upon the conductor 20.
  • the finger 4 of the gripper is extended at 32, facing the spark-arresting finger 19, and is subjected, with it, to contact pressure at 8 by the spring 9, mounted in compression upon a rod 33, and bearing against a stationary stop 11, here assumed to be integral with the conductor 20.
  • the expansion of this spring, upon release, is limited by an abutment 10, at the end of the rod 33, coming into contact with the supporting stop 11.
  • the circuit-breaker that has just been described operates in the following manner:
  • the commutation of the current from the circuit of the finger 3 to the circuit of the finger 4 and then to the spark-arresting circuit 8 is good, provided the contacts are opened in the following order: main contact 1, then main contact 2, and finally spark-arresting contact 8. In this way it will be possible to effect the separation of the contacts in safety.
  • the arrangement of the apparatus is such that the opening of the contacts is effected in the order indicated not only in the case in which the apparatus is being traversed by a large current but also in that in which it is being traversed by a small current, or by no current at all.
  • the electro-dynamic forces that tend to close the apparatus are greater than the constant mechanical forces that act in the opening direction.
  • the finger 3 can begin its movement for opening the contact 1.
  • the fraction of the current passing through this finger is then commuted upon the finger 4, which serves as the sole conductor of the entire current. Since the compensatory effect due to the gripper no longer exists, all the forces that are exerted upon the finger 4 contribute to the opening, which is necessarily produced in the order of the contact 2 first and then the contact 8.
  • An alternating current circuit-breaker for opening a circuit in response to a fault current having an open and closed position
  • first and second conductor means serving as the input and output circuits, respectively, for said circuit-breaker, one of said conductors being provided with a double-faced stationary contact arranged to be gripped between two movable contacts each being mounted at the end of a conducting finger pivotable about a separate parallel axis, said fingers being essentially parallel in the closed position and pivotable about their respective axes to form an angle in the open position, spring means for releasably maintaining said fingers in the closed position, and locking means for releasing said spring means to free said fingers for movement to the open position, said fingers being connected in parallel in their closed position between said first and second conductor means so that said fingers will remain for a time in the closed position upon the release of said spring means due to the electro-dynamic forces of said fault current, said spring means including an articulation constituted by a combination of connecting rods and levers, said articulation being connected at one end to one of said fingers and
  • An alternating current circuit-breaker for opening a circuit in response to a fault current having an open and closed position comprising first and second conductor means serving as the input and output circuits, respectively, for said circuit-breaker, one of said conductors bemg provided With a double-faced stationary contact arranged to be gripped between two movable contacts each being mounted at the end of a conducting finger pivotable about a separate parallel axis, said fingers being essentially parallel in the closed position and pivotable about their respective axes to form an angle in the open position, spring means for releasably maintaining said fingers in the closed position, and locking means for releasing said spring means to free said fingers for movement to the open position, said fingers being connected in parallel in their closed position between said first and second conductor means so that said fingers will remain for a time in the closed position upon the release of said spring means due to the electro-dynamic forces of said fault current, said spring means including an articulation constituted by a combination of connecting rods and levers, said articulation being connected at one end to one of said
  • An alternating current circuit-breaker for opening a circuit in response to a fault current having an open and closed position
  • first and second conductor means serving as the input and output circuits, respectively, for said circuit-breaker, one of said conductors being provided with a double-faced stationary contact arranged to be gripped between two movable contacts each being mounted at the end of a conducting finger pivotable about a separate parallel axis, said fingers being essentially parallel in the closed position and pivotable about their respective axes to form an angle in the open position, spring means for releasably maintaining said fingers in the closed position, and locking means for releasing said spring means to free said fingers for movement to the open position, said fingers being connected in parallel in their closed position between said first and second conductor means so that said fingers will remain for a time in the closed position upon the release of said spring means due to the electro-dynamic forces of said fault current, said spring means including an articulation constituted by a combination of connecting rods and levers, said articulation being connected at one end to one of said fingers and
  • An alternating current circuit-breaker for opening a circuit in response to a fault current having an open and closed position
  • first and second conductor means serving as the input and outputcircuits, respectively, for said circuit-breaker
  • one of said conductors being provided with a double-faced stationary contact arranged to be gripped between two movable contacts each being mounted at the end of a conducting finger pivotable about a separate parallel axis, said fingers being essentially parallel in the closed position and pivotable about their respective axes to form an angle in the open position, spring means for releasably maintaining said fingers in the closed position, and locking means for releasing said spring means to free said fingers for movement to the open position, said fingers being connected in parallel in their closed position between said first and second conductor means so that said fingers will remain for a time in the closed position upon the release of aid spring means due to the electro-dynamic forces of said fault current
  • said spring means including an articulation constituted by a combination of connecting rods and levers, said articulation being connected at one end to one of
  • An alternatiing current circuit-breaker for opening a circuit in response to a fault current having an open and closed position
  • first and second conductor means serving as the input and output circuits, respectively, for said circuit-breaker
  • first and second movable contact means pivotable about separate parallel axes and in gripping contact with one of said conductor means in said closed position
  • spring means for pivoting said movable contact means about their respective axes in opposite directions to said open position
  • said movable contact means being connected between said first and second conductor means soas to be maintained in the closed position in the presence of applied current of at least minimum magnitude by the electro-dynamic forces generated by said current in spite of opposing forces applied by said spring means
  • thirdcontact means mounted on a pivot in connection with said one conductor means and including means for applying a pressure on said second movable contact means effective to pivot said second movable contact means to the open position only after said first movable contact means has been pivoted by said spring means.

Landscapes

  • Breakers (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
US209168A 1961-07-13 1962-07-11 Circuit-breaking device for alternating current arranged for the compensation of electro-dynamic forces Expired - Lifetime US3205333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR867900A FR1301978A (fr) 1961-07-13 1961-07-13 Appareil interrupteur à courant alternatif aménagé pour la compensation des efforts électrodynamiques

Publications (1)

Publication Number Publication Date
US3205333A true US3205333A (en) 1965-09-07

Family

ID=8759287

Family Applications (1)

Application Number Title Priority Date Filing Date
US209168A Expired - Lifetime US3205333A (en) 1961-07-13 1962-07-11 Circuit-breaking device for alternating current arranged for the compensation of electro-dynamic forces

Country Status (7)

Country Link
US (1) US3205333A (sv)
BE (1) BE620240A (sv)
DE (1) DE1191022B (sv)
ES (1) ES279158A1 (sv)
FR (1) FR1301978A (sv)
GB (1) GB942916A (sv)
NL (1) NL280917A (sv)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594491A (en) * 1984-09-28 1986-06-10 Westinghouse Electric Corp. Molded case circuit breaker with a trip mechanism having an intermediate latch lever
US4677269A (en) * 1985-07-12 1987-06-30 Square D Company Isolation switch having a locking bail arm
WO2009013091A1 (de) 2007-07-24 2009-01-29 Siemens Aktiengesellschaft Elektrische schutzeinrichtung
US20120092096A1 (en) * 2010-10-15 2012-04-19 Lsis Co., Ltd. Electromagnetic switching device
US20120092100A1 (en) * 2010-10-15 2012-04-19 Lsis Co., Ltd. Electromagnetic switching apparatus
EP3151262A4 (en) * 2014-05-27 2018-01-17 Technology Power International Ltd. Circuit breaker with quick response and separation and quick response and separation method for circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1580422A (sv) * 1968-07-05 1969-09-05

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632829A (en) * 1951-01-17 1953-03-24 Westinghouse Electric Corp Circuit breaker
US2849579A (en) * 1956-07-31 1958-08-26 Westinghouse Electric Corp Contact structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE478488C (de) * 1926-08-21 1929-06-29 Delle Atel Const Electr Einrichtung an selbsttaetigen Ausschaltern und aehnlichen Apparaten mit Kontaktbruecke

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2632829A (en) * 1951-01-17 1953-03-24 Westinghouse Electric Corp Circuit breaker
US2849579A (en) * 1956-07-31 1958-08-26 Westinghouse Electric Corp Contact structure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4594491A (en) * 1984-09-28 1986-06-10 Westinghouse Electric Corp. Molded case circuit breaker with a trip mechanism having an intermediate latch lever
US4677269A (en) * 1985-07-12 1987-06-30 Square D Company Isolation switch having a locking bail arm
WO2009013091A1 (de) 2007-07-24 2009-01-29 Siemens Aktiengesellschaft Elektrische schutzeinrichtung
US20120092096A1 (en) * 2010-10-15 2012-04-19 Lsis Co., Ltd. Electromagnetic switching device
US20120092100A1 (en) * 2010-10-15 2012-04-19 Lsis Co., Ltd. Electromagnetic switching apparatus
US8558648B2 (en) * 2010-10-15 2013-10-15 Lsis Co., Ltd. Electromagnetic switching apparatus
US8729986B2 (en) * 2010-10-15 2014-05-20 Lsis Co., Ltd. Electromagnetic switching device
EP3151262A4 (en) * 2014-05-27 2018-01-17 Technology Power International Ltd. Circuit breaker with quick response and separation and quick response and separation method for circuit breaker

Also Published As

Publication number Publication date
DE1191022B (de) 1965-04-15
BE620240A (sv)
GB942916A (en) 1963-11-27
NL280917A (sv)
ES279158A1 (es) 1962-12-16
FR1301978A (fr) 1962-08-24

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