GB277967A - Improvements relating to relays for the protection of electric circuits - Google Patents

Improvements relating to relays for the protection of electric circuits

Info

Publication number
GB277967A
GB277967A GB24742/27A GB2474227A GB277967A GB 277967 A GB277967 A GB 277967A GB 24742/27 A GB24742/27 A GB 24742/27A GB 2474227 A GB2474227 A GB 2474227A GB 277967 A GB277967 A GB 277967A
Authority
GB
United Kingdom
Prior art keywords
contacts
line
relays
induction
current
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
GB24742/27A
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.)
General Electric Co
Original Assignee
General Electric 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 General Electric Co filed Critical General Electric Co
Publication of GB277967A publication Critical patent/GB277967A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/40—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to ratio of voltage and current
    • H02H3/407—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to ratio of voltage and current using induction relays

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

277,967. International General Electric Co., Inc., (Assignees of Allgemeine Elektricitõts-Ges.). Sept. 22, 1926, [Convention date]. Void [Published under Sect. 91 of the Acts]. Cut-out arrangements; induction relays. - In order to obtain selective action of time-lag relays in the event of a short-circuit on a line two induction-type impedance relay systems 13, 14 are employed each consisting of two-induction discs 15, 16 and two magnet systems of which 18 is energized by the current in the line and by the inductive voltage drop and the other 19 by the current on the line. The relav system 13 is adjusted so that it will operate and close its contacts 20 at a value somewhat smaller than the inductive resistance of the line and the system 14 is adjusted to operate on a somewhat greater resistance and close its contacts 21. These contacts are in a local tripping circuit for the circuitbreaker trip coil 27. Contacts 22, 23 are also located in the tripping circuit and these are closed after predetermined time-intervals by an overload relay 24 provided with a damping device. A reverse-current relay 28 may control additional contacts in the tripping circuit.
GB24742/27A 1926-09-22 1927-09-20 Improvements relating to relays for the protection of electric circuits Expired GB277967A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE277967X 1926-09-22

Publications (1)

Publication Number Publication Date
GB277967A true GB277967A (en) 1927-12-29

Family

ID=6028426

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24742/27A Expired GB277967A (en) 1926-09-22 1927-09-20 Improvements relating to relays for the protection of electric circuits

Country Status (1)

Country Link
GB (1) GB277967A (en)

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