JPS5050648A - - Google Patents

Info

Publication number
JPS5050648A
JPS5050648A JP49094322A JP9432274A JPS5050648A JP S5050648 A JPS5050648 A JP S5050648A JP 49094322 A JP49094322 A JP 49094322A JP 9432274 A JP9432274 A JP 9432274A JP S5050648 A JPS5050648 A JP S5050648A
Authority
JP
Japan
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.)
Pending
Application number
JP49094322A
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 filed Critical
Publication of JPS5050648A publication Critical patent/JPS5050648A/ja
Pending 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
    • H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
    • H02H1/0076—Details of emergency protective circuit arrangements concerning transmission of signals by superposition on the watched 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
    • H02H3/28—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
    • H02H3/302—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 phase comparison

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Selective Calling Equipment (AREA)
JP49094322A 1973-08-29 1974-08-19 Pending JPS5050648A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00392691A US3849763A (en) 1973-08-29 1973-08-29 Channel delay checkback apparatus

Publications (1)

Publication Number Publication Date
JPS5050648A true JPS5050648A (ja) 1975-05-07

Family

ID=23551621

Family Applications (1)

Application Number Title Priority Date Filing Date
JP49094322A Pending JPS5050648A (ja) 1973-08-29 1974-08-19

Country Status (3)

Country Link
US (1) US3849763A (ja)
JP (1) JPS5050648A (ja)
CA (1) CA998106A (ja)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4234901A (en) * 1979-03-08 1980-11-18 Westinghouse Electric Corp. Protective relay apparatus
JPS5875419A (ja) * 1981-10-29 1983-05-07 株式会社東芝 サンプリング時刻同期装置
US4524446A (en) * 1982-07-13 1985-06-18 Westinghouse Electric Corp. Signal quality monitor for protective relay system
JPS6039310A (ja) * 1983-08-12 1985-03-01 株式会社東芝 サンプリング同期方法
DE502005005872D1 (de) * 2004-11-22 2008-12-18 Minebea Co Ltd Elektrische Maschine, insbesondere bürstenloser Gleichstrommotor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3398234A (en) * 1964-08-04 1968-08-20 American Telephone & Telegraph Multiple address circuit

Also Published As

Publication number Publication date
US3849763A (en) 1974-11-19
CA998106A (en) 1976-10-05

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