US3277262A - Interchangeable contact arrangement for electrical circuit breakers - Google Patents

Interchangeable contact arrangement for electrical circuit breakers Download PDF

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Publication number
US3277262A
US3277262A US359096A US35909664A US3277262A US 3277262 A US3277262 A US 3277262A US 359096 A US359096 A US 359096A US 35909664 A US35909664 A US 35909664A US 3277262 A US3277262 A US 3277262A
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US
United States
Prior art keywords
contact member
movable
movable contact
drive means
circuit
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
US359096A
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English (en)
Inventor
Floessel Carl Dieter
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3277262A publication Critical patent/US3277262A/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
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic

Definitions

  • This invention relates to an arrangement of the contacts in electric circuit-breakers, particularly compressed gas circuit-breakers, in which at least one of the contact members is movable by drive means.
  • gear design calls for the provision of electric power circuit-breakers for a particular rated voltage, all having the same rupturing power, and differing solely in their respective current ratings. This means that the members which carry the current and particularly the contact members of the circuit-breaker must be designed to suit the required different current ratings.
  • a circuit-breaker comprising a quenching chamber for different current ratings and comprising a tubular con tact member
  • the external diameter of the tubular contact member and hence the internal diameter of the quenching chamber containing the same are always identically the same for every current rating, whereas the internal diameter of the tubular member varies with the current rating required. Since substantially the entire length of the contact member carries the current, so that its cross section is determined by the rated current, the application of the described arrangement to high current ratings necessarily leads to a considerable increase in the inertial mass which must be moved. Consequently the power of the drive means must be raised accordingly and more powerful damping devices are needed to provide the same kinematic behavior for ensuring the electrical efficiency of the circuit-breaker. On the other hand, from the point of view of economy the necessity of having to adapt the drive means and damping devices as well as the movable, contact member to the desired current rating is an undesirable feature.
  • circuit breakers for the same voltage having the same rupturing power but for carrying different rated currents should all be fitted with the same drive means for operating the movable contact member, the latter comprising a movable wearing contact which has a small mass in relation to the overall mass of the entire movable assembly, the current from the movable wearing contact being transferred to a stationary conductor by a laminated wiper element, and only the wearing contact, the stationary conductor and the number of laminations of the wiper being designed to suit the required current rating of the circuit-breaker.
  • FIG. 1 is an arrangement of the contacts in a compressed gas circuit-breaker of the kind proposed by the present invention

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Circuit Breakers (AREA)
  • Contacts (AREA)
US359096A 1963-05-21 1964-04-13 Interchangeable contact arrangement for electrical circuit breakers Expired - Lifetime US3277262A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH637063A CH407281A (de) 1963-05-21 1963-05-21 Satz elektrischer Schalter, insbesondere Druckgasschalter

Publications (1)

Publication Number Publication Date
US3277262A true US3277262A (en) 1966-10-04

Family

ID=4308508

Family Applications (1)

Application Number Title Priority Date Filing Date
US359096A Expired - Lifetime US3277262A (en) 1963-05-21 1964-04-13 Interchangeable contact arrangement for electrical circuit breakers

Country Status (3)

Country Link
US (1) US3277262A (de)
CH (1) CH407281A (de)
GB (1) GB1025163A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080192389A1 (en) * 2007-02-12 2008-08-14 Frank John Muench Arc suppression device, system and methods for liquid insulated electrical apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045087A (en) * 1957-05-10 1962-07-17 Siemens Ag Liquid-break circuit interrupters
FR1322732A (fr) * 1962-05-23 1963-03-29 Licentia Gmbh Interrupteur à gaz comprimé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3045087A (en) * 1957-05-10 1962-07-17 Siemens Ag Liquid-break circuit interrupters
FR1322732A (fr) * 1962-05-23 1963-03-29 Licentia Gmbh Interrupteur à gaz comprimé

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080192389A1 (en) * 2007-02-12 2008-08-14 Frank John Muench Arc suppression device, system and methods for liquid insulated electrical apparatus
WO2008100512A1 (en) * 2007-02-12 2008-08-21 Cooper Technologies Company Arc suppression device, system and methods for liquid insulated electrical apparatus

Also Published As

Publication number Publication date
GB1025163A (en) 1966-04-06
CH407281A (de) 1966-02-15

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