GB1449682A - Segregated phase comparison relaying apparatus - Google Patents

Segregated phase comparison relaying apparatus

Info

Publication number
GB1449682A
GB1449682A GB4543073A GB4543073A GB1449682A GB 1449682 A GB1449682 A GB 1449682A GB 4543073 A GB4543073 A GB 4543073A GB 4543073 A GB4543073 A GB 4543073A GB 1449682 A GB1449682 A GB 1449682A
Authority
GB
United Kingdom
Prior art keywords
line
networks
responsive
discontinuity
overcurrent
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
GB4543073A
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.)
CBS Corp
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
Publication of GB1449682A publication Critical patent/GB1449682A/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
    • H02H3/302—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
    • 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
    • H02H7/261—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 involving signal transmission between at least two stations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Feedback Control In General (AREA)
  • Radio Relay Systems (AREA)

Abstract

1449682 Line protective systems WESTINGHOUSE ELECTRIC CORP 28 Sept 1973 [4 Oct 1972] 45430/73 Heading H2K A protection system for a polyphase transmission line has at each end of the line current sensing means 13, 14, 15 each associated with relaying networks 20, 21, 22, controlling breaker tripping networks 24 and responsive to overcurrent or discontinuity in an A.C. wave. In Fig. 2 there are four relaying networks 20, 21, 22 or 23; the latter being responsive to ground faults and having its switch SW1 connected to overcurrent detector I L instead of discontinuity detector 58 via the time delay circuit 58A. Under healthy conditions the transmitter-receiver 78 sends a guard signal to the remote end of the line and itself receives a guard signal which enables it to provide signals to a comparison determinator 56, channel supervisor 106 and channel failure unblock circuit 140 which are changed under fault conditions. The other Figures (not shown) give circuit details as set out in Fig. 2.
GB4543073A 1972-10-04 1973-09-28 Segregated phase comparison relaying apparatus Expired GB1449682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US29503172A 1972-10-04 1972-10-04

Publications (1)

Publication Number Publication Date
GB1449682A true GB1449682A (en) 1976-09-15

Family

ID=23135936

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4543073A Expired GB1449682A (en) 1972-10-04 1973-09-28 Segregated phase comparison relaying apparatus

Country Status (9)

Country Link
JP (1) JPS6147045B2 (en)
AR (1) AR207747A1 (en)
BR (1) BR7307655D0 (en)
CA (1) CA1025992A (en)
FR (1) FR2202390B1 (en)
GB (1) GB1449682A (en)
IN (1) IN140736B (en)
IT (1) IT997405B (en)
SE (1) SE397908B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
FR2202390A1 (en) 1974-05-03
IN140736B (en) 1976-12-18
IT997405B (en) 1975-12-30
BR7307655D0 (en) 1974-08-22
JPS6147045B2 (en) 1986-10-17
SE397908B (en) 1977-11-21
AR207747A1 (en) 1976-10-29
FR2202390B1 (en) 1980-07-25
JPS49132540A (en) 1974-12-19
AU6102873A (en) 1975-04-10
CA1025992A (en) 1978-02-07

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee