IT1088501B - Apparecchiatura di protezione a confronto di fase particolarmente per linee di trasmissione di potenza - Google Patents

Apparecchiatura di protezione a confronto di fase particolarmente per linee di trasmissione di potenza

Info

Publication number
IT1088501B
IT1088501B IT7726777A IT2677777A IT1088501B IT 1088501 B IT1088501 B IT 1088501B IT 7726777 A IT7726777 A IT 7726777A IT 2677777 A IT2677777 A IT 2677777A IT 1088501 B IT1088501 B IT 1088501B
Authority
IT
Italy
Prior art keywords
power transmission
transmission lines
phase comparison
protection equipment
equipment especially
Prior art date
Application number
IT7726777A
Other languages
English (en)
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of IT1088501B publication Critical patent/IT1088501B/it

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
    • H02H3/302—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)
  • Emergency Protection Circuit Devices (AREA)
IT7726777A 1976-08-20 1977-08-18 Apparecchiatura di protezione a confronto di fase particolarmente per linee di trasmissione di potenza IT1088501B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/716,045 US4053940A (en) 1976-08-20 1976-08-20 Modified offset keying apparatus for phase comparison relaying

Publications (1)

Publication Number Publication Date
IT1088501B true IT1088501B (it) 1985-06-10

Family

ID=24876503

Family Applications (1)

Application Number Title Priority Date Filing Date
IT7726777A IT1088501B (it) 1976-08-20 1977-08-18 Apparecchiatura di protezione a confronto di fase particolarmente per linee di trasmissione di potenza

Country Status (11)

Country Link
US (1) US4053940A (it)
JP (1) JPS5325847A (it)
BR (1) BR7705487A (it)
CA (1) CA1085953A (it)
DE (1) DE2736953A1 (it)
ES (1) ES461776A1 (it)
FR (1) FR2362513A1 (it)
GB (1) GB1587447A (it)
IT (1) IT1088501B (it)
MX (1) MX143975A (it)
SE (1) SE438580B (it)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54137649A (en) * 1978-04-18 1979-10-25 Tokyo Electric Power Co Inc:The Digital protective relay device
JPS5752321A (en) * 1980-09-10 1982-03-27 Mitsubishi Electric Corp Phase discriminator
US4935837A (en) * 1989-04-03 1990-06-19 Abb Power T&D Company Inc. Phase comparison relaying system with single channel communications link
US6469882B1 (en) * 2001-10-31 2002-10-22 General Electric Company Current transformer initial condition correction
JP4861542B2 (ja) * 2006-07-13 2012-01-25 大成化工株式会社 キャップ付き容器におけるキャップの閉蓋案内装置。

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5013937A (it) * 1973-06-08 1975-02-13
US3986079A (en) * 1975-02-07 1976-10-12 Westinghouse Electric Corporation Offset keying technique for segregated phase comparison relaying

Also Published As

Publication number Publication date
JPS5325847A (en) 1978-03-10
SE7709367L (sv) 1978-02-21
FR2362513A1 (fr) 1978-03-17
BR7705487A (pt) 1978-07-04
MX143975A (es) 1981-08-12
FR2362513B1 (it) 1980-05-16
DE2736953A1 (de) 1978-02-23
CA1085953A (en) 1980-09-16
US4053940A (en) 1977-10-11
ES461776A1 (es) 1978-12-01
SE438580B (sv) 1985-04-22
GB1587447A (en) 1981-04-01

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