GB269177A - Improvements in and relating to electric circuit interrupters - Google Patents

Improvements in and relating to electric circuit interrupters

Info

Publication number
GB269177A
GB269177A GB9345/27A GB934527A GB269177A GB 269177 A GB269177 A GB 269177A GB 9345/27 A GB9345/27 A GB 9345/27A GB 934527 A GB934527 A GB 934527A GB 269177 A GB269177 A GB 269177A
Authority
GB
United Kingdom
Prior art keywords
contact
current
poles
flux
bucking
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
Application number
GB9345/27A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB269177A publication Critical patent/GB269177A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H77/00—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
    • H01H77/02—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
    • H01H77/06—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electromagnetic opening
    • H01H77/08—Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electromagnetic opening retained closed by permanent or remanent magnetism and opened by windings acting in opposition
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/26—Electromagnetic mechanisms with windings acting in opposition

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)

Abstract

269,177. British Thomson-Houston Co., Ltd., (Assignees of Roberson, F.). April 9, 1926, [Convention date]. Automatic circucit-breakers.-In the circuitbreaker described in Specification 252,185, in which two contact-arms 10, 11, Fig. 1, are maintained in contact with one. another (after actuation by hand or electromagnetically) by the poles 20, 21 of an electromagnetic, in order to adapt the breaker to A.C. or D.C. circuits in which the current may be in either direction or may reverse, the bucking-bar 26, Figs. 1 and 2, instead of being of U-form is S- or Z-shaped so that the main current through it weakens the hold-on flux for one of the contact arms and strengthens it for the other according to the direction of the main current. In a modification the same result is obtained by using a separate magnetic core and separate excitation for each of the pairs of poles 20, 21 and employing as before a U-shaped bucking-bar which may be energized from a current transformer in the line. In this case the flux across the two pole gaps instead of being in the same direction as in Fig. 1 are in opposite directions. Specifications 125,279, and 29980/10 are referred to also.
GB9345/27A 1926-04-09 1927-04-05 Improvements in and relating to electric circuit interrupters Expired GB269177A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US100976A US1687515A (en) 1926-04-09 1926-04-09 Circuit interrupter

Publications (1)

Publication Number Publication Date
GB269177A true GB269177A (en) 1927-12-22

Family

ID=22282488

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9345/27A Expired GB269177A (en) 1926-04-09 1927-04-05 Improvements in and relating to electric circuit interrupters

Country Status (3)

Country Link
US (1) US1687515A (en)
DE (2) DE446234C (en)
GB (1) GB269177A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2673263A (en) * 1951-05-18 1954-03-23 Gen Electric Thermomagnetic electric relay
US3235773A (en) * 1963-09-16 1966-02-15 Ite Circuit Breaker Ltd Two-pole high speed breaker
US3373383A (en) * 1965-02-02 1968-03-12 Shoichi Shimada Automatic current limiting circuit breaker
US3453566A (en) * 1966-02-05 1969-07-01 Shoichi Shimada Automatic current limiting circuit breaker
US3777293A (en) * 1972-10-30 1973-12-04 Tokyo Shibaura Electric Co No-fuse circuit breaker

Also Published As

Publication number Publication date
US1687515A (en) 1928-10-16
DE446234C (en) 1927-06-27
DE461448C (en) 1928-06-22

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