FR856122A - Improvements to differential protection devices - Google Patents

Improvements to differential protection devices

Info

Publication number
FR856122A
FR856122A FR856122DA FR856122A FR 856122 A FR856122 A FR 856122A FR 856122D A FR856122D A FR 856122DA FR 856122 A FR856122 A FR 856122A
Authority
FR
France
Prior art keywords
protection devices
differential protection
differential
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.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger 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 Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Application granted granted Critical
Publication of FR856122A publication Critical patent/FR856122A/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
FR856122D 1939-06-13 1939-06-13 Improvements to differential protection devices Expired FR856122A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR856122T 1939-06-13

Publications (1)

Publication Number Publication Date
FR856122A true FR856122A (en) 1940-05-30

Family

ID=9328689

Family Applications (1)

Application Number Title Priority Date Filing Date
FR856122D Expired FR856122A (en) 1939-06-13 1939-06-13 Improvements to differential protection devices

Country Status (1)

Country Link
FR (1) FR856122A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148309A (en) * 1960-08-23 1964-09-08 John H Neher Pilot wire protective system for transmission lines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3148309A (en) * 1960-08-23 1964-09-08 John H Neher Pilot wire protective system for transmission lines

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