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GB902999A - Improvements in and relating to three-phase symmetrical component analysers and their application in electrical protective relay systems - Google Patents

Improvements in and relating to three-phase symmetrical component analysers and their application in electrical protective relay systems

Info

Publication number
GB902999A
GB902999A GB778858A GB778858A GB902999A GB 902999 A GB902999 A GB 902999A GB 778858 A GB778858 A GB 778858A GB 778858 A GB778858 A GB 778858A GB 902999 A GB902999 A GB 902999A
Authority
GB
United Kingdom
Prior art keywords
impedances
phase
components
relating
application
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
GB778858A
Inventor
Paul Mathews
Colin Adamson
Elsayed Abd-El-Hady Talkhan
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 GB778858A priority Critical patent/GB902999A/en
Publication of GB902999A publication Critical patent/GB902999A/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
    • H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/343—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system using phase sequence analysers

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

902,999. Protective cut-out arrangements. ENGLISH ELECTRIC CO. Ltd. Aug. 14, 1958 [March 11, 1958], No. 7788/58. Class 38 (5). A network for deriving signals representing the positive and negative phase-sequence current components of a protected circuit is energized from current transformers CT which are delta-connected so as to remove the zerosequence components. The network comprises 1 : 1 ratio auxiliary transformers A.C.T. which energize impedances Z 1 , Z 2 in accordance with one phase current iq. The other phase currents ip and ir energize impedances Z 1 L60‹ and Z 2 L60‹ such that the sum of the potential drops across the impedances Z 1 , Z 1 L60‹ is a measure of the negative phase-sequence components and the sum of the potential drops across the impedances Z 2 , Z 2 L60‹ is a measure of the positive phase-sequence components. The network may form part of the protective arrangement of Specification 902,998. Specification 903,000 also is referred to.
GB778858A 1958-03-11 1958-03-11 Improvements in and relating to three-phase symmetrical component analysers and their application in electrical protective relay systems Expired GB902999A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB778858A GB902999A (en) 1958-03-11 1958-03-11 Improvements in and relating to three-phase symmetrical component analysers and their application in electrical protective relay systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB778858A GB902999A (en) 1958-03-11 1958-03-11 Improvements in and relating to three-phase symmetrical component analysers and their application in electrical protective relay systems

Publications (1)

Publication Number Publication Date
GB902999A true GB902999A (en) 1962-08-09

Family

ID=9839740

Family Applications (1)

Application Number Title Priority Date Filing Date
GB778858A Expired GB902999A (en) 1958-03-11 1958-03-11 Improvements in and relating to three-phase symmetrical component analysers and their application in electrical protective relay systems

Country Status (1)

Country Link
GB (1) GB902999A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232839A (en) * 1986-09-30 1990-12-19 Electricity Ass Services Ltd Remote protection of three phase distribution transformers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232839A (en) * 1986-09-30 1990-12-19 Electricity Ass Services Ltd Remote protection of three phase distribution transformers
GB2232839B (en) * 1986-09-30 1991-03-27 Electricity Ass Services Ltd Remote protection of three phase distribution transformers
GB2195845B (en) * 1986-09-30 1991-03-27 Electricity Council Remote protection of three phase distribution transformers

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