US3202781A - Stationary contact structure for electrical circuit breakers - Google Patents

Stationary contact structure for electrical circuit breakers Download PDF

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Publication number
US3202781A
US3202781A US159614A US15961461A US3202781A US 3202781 A US3202781 A US 3202781A US 159614 A US159614 A US 159614A US 15961461 A US15961461 A US 15961461A US 3202781 A US3202781 A US 3202781A
Authority
US
United States
Prior art keywords
contact
fixed support
stationary
circuit breakers
conductor means
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
US159614A
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English (en)
Inventor
Latour Andre
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin 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 Merlin Gerin SA filed Critical Merlin Gerin SA
Application granted granted Critical
Publication of US3202781A publication Critical patent/US3202781A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/60—Mechanical arrangements for preventing or damping vibration or shock
    • 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
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • 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
    • 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
    • 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
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • circuit breakers for high breaking capacities the movable part of the circuit breaker has considerable inertia due to its bulky structure.
  • the structure according to the invention includes a contact member resiliently supported by the conductor or conductors electrically connecting said member to the stationary terminal, a resilient abutment being provided so that the kinetic energy imparted to this contact member by the shock of the movable contact at the end of its circuit closing movement is absorbed simultaneously by the resilient conductors and by the resilient abutment.
  • Another object of the invention is to increase the contact pressure in the closed position of the circuit breaker without further means except these supporting conductors to urge magnetically the movable contact of the circuit breaker toward the stationary contact structure.
  • FIG. 1 shows an elevational view of the pressure contacts according to the invention.
  • FIG. 2 represents a section along the line II-II of FIG. 1.
  • the circuit breaker to which the invention is applied comprises a movable contact 11 and a stationary contact 20 which may be shaped as an arcing contact and which is so mounted on the insulator 22 by a bolt 23 that it can perform a limited movement in a direction parallel with the plane in which the movable contact moves.
  • a rubber ring 21 is interposed between the insulator and the contact 20.
  • the weight of the contact 20 is supported by the upper ends of the conductors 24 and 24', each of which is bent to form two turns covered by a layer of insulating material 16, 16'.
  • the opposite ends of the conductors are rigidly connected respectively to the contact 3,202,781 Patented Aug.
  • the stationary conductors 24, 24 are so designed, that their elasticity ensures a limited mobility to the contact member 20.
  • the current fiow in the winding formed by the conductors 24, 24 and the current flow in the movable contact 11, in the closed position of this contact develop electrodynamic forces which urge the movable contact 11 toward the contact 20.
  • the number of turns of the winding is chosen in accordance with the desired degree of closing pressure.
  • the magnetic circuit 18 allows the concentration of a magnetic field in the useful part between the windings, Where the arc is formed, and tends to displace the arc toward the arcing portions of the contact 11 and 20.
  • a shock absorbing contact for the movable contact arm of a circuit breaker comprising:

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
US159614A 1960-12-20 1961-12-15 Stationary contact structure for electrical circuit breakers Expired - Lifetime US3202781A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR4316A FR1285301A (fr) 1960-12-20 1960-12-20 Dispositif de contacts électriques pour disjoncteurs

Publications (1)

Publication Number Publication Date
US3202781A true US3202781A (en) 1965-08-24

Family

ID=9692790

Family Applications (1)

Application Number Title Priority Date Filing Date
US159614A Expired - Lifetime US3202781A (en) 1960-12-20 1961-12-15 Stationary contact structure for electrical circuit breakers

Country Status (6)

Country Link
US (1) US3202781A (fr)
BE (1) BE611464A (fr)
CH (2) CH378389A (fr)
DE (1) DE1157686B (fr)
FR (1) FR1285301A (fr)
GB (1) GB977526A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4226867A (en) * 1978-10-06 1980-10-07 Merck & Co., Inc. 3,3-Substituted spiro-1,2,4-benzothiadiazines

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545341A (en) * 1944-04-22 1951-03-13 Ite Circuit Breaker Ltd Blow on arc tip
US2555251A (en) * 1948-09-16 1951-05-29 Mcgraw Electric Co Switch construction
US2579523A (en) * 1947-01-24 1951-12-25 Int Standard Electric Corp Telegraph relay
US2679561A (en) * 1951-09-19 1954-05-25 Telemecanique Electrique Circuit breaking device
US2683875A (en) * 1950-12-08 1954-07-13 Westinghouse Electric Corp Method of providing metallic segments on elastomer members
US2727114A (en) * 1953-06-15 1955-12-13 Fkg Fritz Kesselring Geratebau Switching apparatus
US2759076A (en) * 1954-06-25 1956-08-14 Southern States Equipment Corp Electric switch
US2821594A (en) * 1954-02-04 1958-01-28 Merlin Gerin Electrodynamic compensation device for pressure contacts

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545341A (en) * 1944-04-22 1951-03-13 Ite Circuit Breaker Ltd Blow on arc tip
US2579523A (en) * 1947-01-24 1951-12-25 Int Standard Electric Corp Telegraph relay
US2555251A (en) * 1948-09-16 1951-05-29 Mcgraw Electric Co Switch construction
US2683875A (en) * 1950-12-08 1954-07-13 Westinghouse Electric Corp Method of providing metallic segments on elastomer members
US2679561A (en) * 1951-09-19 1954-05-25 Telemecanique Electrique Circuit breaking device
US2727114A (en) * 1953-06-15 1955-12-13 Fkg Fritz Kesselring Geratebau Switching apparatus
US2821594A (en) * 1954-02-04 1958-01-28 Merlin Gerin Electrodynamic compensation device for pressure contacts
US2759076A (en) * 1954-06-25 1956-08-14 Southern States Equipment Corp Electric switch

Also Published As

Publication number Publication date
CH375421A (fr) 1964-02-29
BE611464A (fr) 1962-03-30
CH378389A (fr) 1964-06-15
DE1157686B (de) 1963-11-21
FR1285301A (fr) 1962-02-23
GB977526A (en) 1964-12-09

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