FR550433A - Improvements to protection devices for electrical circuits - Google Patents

Improvements to protection devices for electrical circuits

Info

Publication number
FR550433A
FR550433A FR550433DA FR550433A FR 550433 A FR550433 A FR 550433A FR 550433D A FR550433D A FR 550433DA FR 550433 A FR550433 A FR 550433A
Authority
FR
France
Prior art keywords
electrical circuits
protection devices
circuits
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
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 Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR550433A publication Critical patent/FR550433A/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
    • H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • H02H3/30—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel
    • H02H3/307—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel involving comparison of quantities derived from a plurality of phases, e.g. homopolar quantities; using mixing transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
FR550433D 1921-04-22 1922-04-21 Improvements to protection devices for electrical circuits Expired FR550433A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US550433XA 1921-04-22 1921-04-22

Publications (1)

Publication Number Publication Date
FR550433A true FR550433A (en) 1923-03-09

Family

ID=21995193

Family Applications (1)

Application Number Title Priority Date Filing Date
FR550433D Expired FR550433A (en) 1921-04-22 1922-04-21 Improvements to protection devices for electrical circuits

Country Status (1)

Country Link
FR (1) FR550433A (en)

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