FR2332638A1 - Protection against homopolar losses in multiphase supplies - has milli joule threshold level using resonant circuit with two secondary windings on toroidal core - Google Patents

Protection against homopolar losses in multiphase supplies - has milli joule threshold level using resonant circuit with two secondary windings on toroidal core

Info

Publication number
FR2332638A1
FR2332638A1 FR7535274A FR7535274A FR2332638A1 FR 2332638 A1 FR2332638 A1 FR 2332638A1 FR 7535274 A FR7535274 A FR 7535274A FR 7535274 A FR7535274 A FR 7535274A FR 2332638 A1 FR2332638 A1 FR 2332638A1
Authority
FR
France
Prior art keywords
secondary windings
multiphase
protection against
toroidal core
homopolar
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.)
Granted
Application number
FR7535274A
Other languages
French (fr)
Other versions
FR2332638B1 (en
Inventor
Jean Leroy
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.)
Electricite de France SA
Original Assignee
Electricite de France SA
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 Electricite de France SA filed Critical Electricite de France SA
Priority to FR7535274A priority Critical patent/FR2332638A1/en
Publication of FR2332638A1 publication Critical patent/FR2332638A1/en
Application granted granted Critical
Publication of FR2332638B1 publication Critical patent/FR2332638B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • H02H1/063—Arrangements for supplying operative power primary power being supplied by fault current
    • 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
    • H02H3/347—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 summation current transformers

Landscapes

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

Abstract

Automatic protection against faults in any one line of a multiphase power supply system, the fault line being automatically isolated dependant on the set threshold operating level of the circuit. The circuit can operate at mill-joule level, the operating signal being derived from two secondary windings on a toroidal core. The primary is a cable branched from the multiphase supply via circuit breaker contacts. The output from the sensor drives the circuit breaker energising coil. The operation is dependent upon the charging of a capacitor which is set to provide resonance with one of the secondary windings, the second winding providing a threshold voltage.
FR7535274A 1975-11-19 1975-11-19 Protection against homopolar losses in multiphase supplies - has milli joule threshold level using resonant circuit with two secondary windings on toroidal core Granted FR2332638A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7535274A FR2332638A1 (en) 1975-11-19 1975-11-19 Protection against homopolar losses in multiphase supplies - has milli joule threshold level using resonant circuit with two secondary windings on toroidal core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7535274A FR2332638A1 (en) 1975-11-19 1975-11-19 Protection against homopolar losses in multiphase supplies - has milli joule threshold level using resonant circuit with two secondary windings on toroidal core

Publications (2)

Publication Number Publication Date
FR2332638A1 true FR2332638A1 (en) 1977-06-17
FR2332638B1 FR2332638B1 (en) 1981-09-25

Family

ID=9162586

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7535274A Granted FR2332638A1 (en) 1975-11-19 1975-11-19 Protection against homopolar losses in multiphase supplies - has milli joule threshold level using resonant circuit with two secondary windings on toroidal core

Country Status (1)

Country Link
FR (1) FR2332638A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2898213A1 (en) * 2006-03-06 2007-09-07 Mitsubishi Electric Corp Earth leakage-circuit breaker for detecting residual current of three-phase circuit, has power supply unit including two constant voltage circuits, where one of voltage circuits includes logic unit with field-effect transistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2898213A1 (en) * 2006-03-06 2007-09-07 Mitsubishi Electric Corp Earth leakage-circuit breaker for detecting residual current of three-phase circuit, has power supply unit including two constant voltage circuits, where one of voltage circuits includes logic unit with field-effect transistor

Also Published As

Publication number Publication date
FR2332638B1 (en) 1981-09-25

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Legal Events

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ST Notification of lapse
DA Annulment of decision of lapse
ST Notification of lapse