IT997405B - Apparecchiatura logica di protezio ne particolarmente per linee polifa si di trasmissione dell energia elettrica - Google Patents

Apparecchiatura logica di protezio ne particolarmente per linee polifa si di trasmissione dell energia elettrica

Info

Publication number
IT997405B
IT997405B IT41652/73A IT4165273A IT997405B IT 997405 B IT997405 B IT 997405B IT 41652/73 A IT41652/73 A IT 41652/73A IT 4165273 A IT4165273 A IT 4165273A IT 997405 B IT997405 B IT 997405B
Authority
IT
Italy
Prior art keywords
polifa
electric power
power transmission
transmission lines
equipment particularly
Prior art date
Application number
IT41652/73A
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 IT997405B publication Critical patent/IT997405B/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
    • 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)
  • Feedback Control In General (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Radio Relay Systems (AREA)
IT41652/73A 1972-10-04 1973-10-02 Apparecchiatura logica di protezio ne particolarmente per linee polifa si di trasmissione dell energia elettrica IT997405B (it)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
IT997405B true IT997405B (it) 1975-12-30

Family

ID=23135936

Family Applications (1)

Application Number Title Priority Date Filing Date
IT41652/73A IT997405B (it) 1972-10-04 1973-10-02 Apparecchiatura logica di protezio ne particolarmente per linee polifa si di trasmissione dell energia elettrica

Country Status (9)

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

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
GB1449682A (en) 1976-09-15
IN140736B (it) 1976-12-18
FR2202390B1 (it) 1980-07-25
AU6102873A (en) 1975-04-10
SE397908B (sv) 1977-11-21
JPS49132540A (it) 1974-12-19
BR7307655D0 (pt) 1974-08-22
AR207747A1 (es) 1976-10-29
CA1025992A (en) 1978-02-07
FR2202390A1 (it) 1974-05-03
JPS6147045B2 (it) 1986-10-17

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