GB832501A - Improvements in and relating to electrical protection relays - Google Patents

Improvements in and relating to electrical protection relays

Info

Publication number
GB832501A
GB832501A GB936/56A GB93656A GB832501A GB 832501 A GB832501 A GB 832501A GB 936/56 A GB936/56 A GB 936/56A GB 93656 A GB93656 A GB 93656A GB 832501 A GB832501 A GB 832501A
Authority
GB
United Kingdom
Prior art keywords
core
relating
gap
induction
electrical protection
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
GB936/56A
Inventor
Eric Paddison
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.)
English Electric Co Ltd
Original Assignee
English Electric 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB936/56A priority Critical patent/GB832501A/en
Priority to US632845A priority patent/US2872626A/en
Publication of GB832501A publication Critical patent/GB832501A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01H71/42—Induction-motor, induced-current, or electrodynamic release mechanisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H53/00—Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
    • H01H53/10—Induction relays, i.e. relays in which the interaction is between a magnetic field and current induced thereby in a conductor
    • H01H53/12—Ferraris relays

Landscapes

  • Electromagnets (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

832,501. Induction relays. ENGLISH ELECTRIC CO. Ltd. Jan. 11, 1957 [Jan. 11, 1956], No. 936/56. Class 38 (5). In order to produce a " very inverse " characteristic in a time-overcurrent induction relay, the core 10 of the shaded-pole drive electromagnet has a saturable bridge 10d across the gap 10a in which the induction disc 12 rotates and a more-readily-saturable bridge 10c across a gap 10b in the core in series with the main gap 10a. Non-magnetic spacers may be placed between the core 10 and the bridge member 10d.
GB936/56A 1956-01-11 1956-01-11 Improvements in and relating to electrical protection relays Expired GB832501A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB936/56A GB832501A (en) 1956-01-11 1956-01-11 Improvements in and relating to electrical protection relays
US632845A US2872626A (en) 1956-01-11 1957-01-07 Time-overcurrent relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB936/56A GB832501A (en) 1956-01-11 1956-01-11 Improvements in and relating to electrical protection relays

Publications (1)

Publication Number Publication Date
GB832501A true GB832501A (en) 1960-04-13

Family

ID=9713116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB936/56A Expired GB832501A (en) 1956-01-11 1956-01-11 Improvements in and relating to electrical protection relays

Country Status (2)

Country Link
US (1) US2872626A (en)
GB (1) GB832501A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134089A (en) * 1977-07-28 1979-01-09 General Electric Company Electromagnet for an extremely inverse time overcurrent protective relay
FR2460028A1 (en) * 1979-06-25 1981-01-16 Portescap MAGNETIC TRANSDUCER WITH MOBILE MAGNET

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1273940A (en) * 1916-09-16 1918-07-30 Westinghouse Electric & Mfg Co Relay.
US1677336A (en) * 1925-05-25 1928-07-17 Westinghouse Electric & Mfg Co Induction relay

Also Published As

Publication number Publication date
US2872626A (en) 1959-02-03

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