FR972827A - Improvements to selective protection devices - Google Patents

Improvements to selective protection devices

Info

Publication number
FR972827A
FR972827A FR972827DA FR972827A FR 972827 A FR972827 A FR 972827A FR 972827D A FR972827D A FR 972827DA FR 972827 A FR972827 A FR 972827A
Authority
FR
France
Prior art keywords
protection devices
selective protection
selective
devices
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
Other languages
French (fr)
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.)
Compagnie Electro Mecanique SA
Original Assignee
Compagnie Electro Mecanique 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 Compagnie Electro Mecanique SA filed Critical Compagnie Electro Mecanique SA
Application granted granted Critical
Publication of FR972827A publication Critical patent/FR972827A/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
    • H02H3/353—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 involving comparison of phase voltages
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
FR972827D 1943-06-30 1941-05-09 Improvements to selective protection devices Expired FR972827A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR55663T 1943-06-30

Publications (1)

Publication Number Publication Date
FR972827A true FR972827A (en) 1951-02-05

Family

ID=8689967

Family Applications (2)

Application Number Title Priority Date Filing Date
FR972827D Expired FR972827A (en) 1943-06-30 1941-05-09 Improvements to selective protection devices
FR55663D Expired FR55663E (en) 1943-06-30 1943-06-30 Improvements to selective protection devices

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR55663D Expired FR55663E (en) 1943-06-30 1943-06-30 Improvements to selective protection devices

Country Status (2)

Country Link
FR (2) FR972827A (en)
GB (1) GB610837A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021703A (en) * 1975-06-02 1977-05-03 Westinghouse Electric Corporation Phase imbalance detection circuit

Also Published As

Publication number Publication date
GB610837A (en) 1948-10-21
FR55663E (en) 1952-09-03

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