GB883660A - Improvements in and relating to electrical protective relay systems - Google Patents

Improvements in and relating to electrical protective relay systems

Info

Publication number
GB883660A
GB883660A GB1245357A GB1245357A GB883660A GB 883660 A GB883660 A GB 883660A GB 1245357 A GB1245357 A GB 1245357A GB 1245357 A GB1245357 A GB 1245357A GB 883660 A GB883660 A GB 883660A
Authority
GB
United Kingdom
Prior art keywords
winding
current
energized
circuit
relay
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
GB1245357A
Inventor
Leslie Raymond Rowley
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 GB1245357A priority Critical patent/GB883660A/en
Publication of GB883660A publication Critical patent/GB883660A/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
    • H02H3/44—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 the rate of change of electrical quantities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
    • B61L5/12—Visible signals
    • B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
    • B61L5/1809—Daylight signals
    • B61L5/1881—Wiring diagrams for power supply, control or testing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/22—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
    • H01H47/34—Energising current supplied by magnetic amplifier

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

883,660. Protective cut-out arrangements. ENGLISH ELECTRIC CO. Ltd. April 15, 1958 [April 16, 1957], No. 12453/57. Class 38 (5). A protective arrangement, e.g. for A.C. traction circuits, has a distance relay 22 with an operating winding 22a energized in proportion to the current in the protected circuit 20 and a restraining winding 22b energized in proportion to the voltage of the protected circuit under the control of a transductor 23 having a control winding 23c energized by a current proportional to the current in the protected circuit after a time delay imposed by a time delay circuit. This delay circuit comprises a capacitor 29 and resistor 28 and is supplied from a current transformer 25 by means of a transactor 24 and rectifier 27. Under steady-state conditions the control winding 23c is effective to reduce the impedance of the main transductor winding 23a which is in series with the restraining winding 22b. A sudden rise in the current in the circuit 20 does not produce an immediate proportional increase in the winding 23c so that the relay has a higher impedance setting under fault conditions than under normal load conditions. The relay has a polarizing coil 22c.
GB1245357A 1957-04-16 1957-04-16 Improvements in and relating to electrical protective relay systems Expired GB883660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1245357A GB883660A (en) 1957-04-16 1957-04-16 Improvements in and relating to electrical protective relay systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1245357A GB883660A (en) 1957-04-16 1957-04-16 Improvements in and relating to electrical protective relay systems

Publications (1)

Publication Number Publication Date
GB883660A true GB883660A (en) 1961-12-06

Family

ID=10004883

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1245357A Expired GB883660A (en) 1957-04-16 1957-04-16 Improvements in and relating to electrical protective relay systems

Country Status (1)

Country Link
GB (1) GB883660A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046920A2 (en) * 1999-04-20 2000-10-25 Alcatel Circuit for current threshold detection
US9025298B2 (en) 2012-10-22 2015-05-05 Eaton Corporation Electrical switching apparatus including transductor circuit and alternating current electronic trip circuit
WO2015088654A1 (en) * 2013-12-09 2015-06-18 Eaton Corporation Electrical switching apparatus including transductor circuit and alternating current electronic trip circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1046920A2 (en) * 1999-04-20 2000-10-25 Alcatel Circuit for current threshold detection
EP1046920A3 (en) * 1999-04-20 2004-01-28 Alcatel Circuit for current threshold detection
US9025298B2 (en) 2012-10-22 2015-05-05 Eaton Corporation Electrical switching apparatus including transductor circuit and alternating current electronic trip circuit
WO2015088654A1 (en) * 2013-12-09 2015-06-18 Eaton Corporation Electrical switching apparatus including transductor circuit and alternating current electronic trip circuit

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