GB840840A - Overload protective system for electric circuits - Google Patents

Overload protective system for electric circuits

Info

Publication number
GB840840A
GB840840A GB2199458A GB2199458A GB840840A GB 840840 A GB840840 A GB 840840A GB 2199458 A GB2199458 A GB 2199458A GB 2199458 A GB2199458 A GB 2199458A GB 840840 A GB840840 A GB 840840A
Authority
GB
United Kingdom
Prior art keywords
coil
contacts
armature
plate
operating
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
GB2199458A
Other languages
English (en)
Inventor
Arthur Ennis Prince
David Carl Larson
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.)
Otis Elevator Co
Original Assignee
Otis Elevator Co
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 Otis Elevator Co filed Critical Otis Elevator Co
Publication of GB840840A publication Critical patent/GB840840A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0855—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load avoiding response to transient overloads, e.g. during starting
    • 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
    • H01H71/44—Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load

Landscapes

  • Breakers (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Stopping Of Electric Motors (AREA)
GB2199458A 1957-01-22 1958-07-09 Overload protective system for electric circuits Expired GB840840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63539457 US2890402A (en) 1957-01-22 1957-01-22 Overload protective device for motor control systems

Publications (1)

Publication Number Publication Date
GB840840A true GB840840A (en) 1960-07-13

Family

ID=52822233

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2199458A Expired GB840840A (en) 1957-01-22 1958-07-09 Overload protective system for electric circuits

Country Status (4)

Country Link
US (1) US2890402A (enExample)
JP (1) JPS363226B1 (enExample)
FR (1) FR1414701A (enExample)
GB (1) GB840840A (enExample)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112383026B (zh) * 2020-11-05 2022-10-11 山西垣曲抽水蓄能有限公司 一种保护配合关系的检查方法、装置、介质及电子设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735041A (en) * 1956-02-14 Electric protective system utilizing
US1922089A (en) * 1930-09-06 1933-08-15 Union Switch & Signal Co Slow acting relay
US2339125A (en) * 1942-07-21 1944-01-11 Gen Electric Electromagnetic time element device
US2626377A (en) * 1949-01-12 1953-01-20 Electric Controller & Mfg Co Combination of an electric switch and air core reactor for protecting electrical equipment from excessive fault currents

Also Published As

Publication number Publication date
JPS363226B1 (enExample) 1961-04-15
FR1414701A (fr) 1965-10-22
US2890402A (en) 1959-06-09

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