GB1404823A - Frequency shifted modulated carrier protective relaying system with amplitude modulated voice communication - Google Patents

Frequency shifted modulated carrier protective relaying system with amplitude modulated voice communication

Info

Publication number
GB1404823A
GB1404823A GB2522072A GB2522072A GB1404823A GB 1404823 A GB1404823 A GB 1404823A GB 2522072 A GB2522072 A GB 2522072A GB 2522072 A GB2522072 A GB 2522072A GB 1404823 A GB1404823 A GB 1404823A
Authority
GB
United Kingdom
Prior art keywords
carrier
signal
frequency
level
power
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
GB2522072A
Other languages
English (en)
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.)
Westinghouse Electric 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 GB1404823A publication Critical patent/GB1404823A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Selective Calling Equipment (AREA)
  • Radio Relay Systems (AREA)
GB2522072A 1971-06-29 1972-05-30 Frequency shifted modulated carrier protective relaying system with amplitude modulated voice communication Expired GB1404823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15788071A 1971-06-29 1971-06-29

Publications (1)

Publication Number Publication Date
GB1404823A true GB1404823A (en) 1975-09-03

Family

ID=22565675

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2522072A Expired GB1404823A (en) 1971-06-29 1972-05-30 Frequency shifted modulated carrier protective relaying system with amplitude modulated voice communication

Country Status (6)

Country Link
US (1) US3707651A (enExample)
ES (1) ES404296A1 (enExample)
FR (1) FR2143825B1 (enExample)
GB (1) GB1404823A (enExample)
IT (1) IT956858B (enExample)
SE (1) SE384308B (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114077A (en) * 1977-04-01 1978-09-12 Westinghouse Electric Corp. Rotor overtemperature protection for electric motors
CH642208A5 (fr) * 1981-03-16 1984-03-30 Sss 3 Sa Geneve Installation de signalisation electrique comprenant au moins un emetteur et un recepteur.
US4591940A (en) * 1982-07-13 1986-05-27 Westinghouse Electric Corp. Signal quality monitor for protective relay system
US5426554A (en) * 1991-03-19 1995-06-20 Albert Nocentino, Jr. Audio bandwidth interface apparatus for pilot wire relays
US5592354A (en) * 1991-03-19 1997-01-07 Nocentino, Jr.; Albert Audio bandwidth interface apparatus for pilot wire relays
DE10032422C1 (de) * 2000-07-04 2002-01-10 Siemens Ag Verfahren und Vorrichtung zur Sicherung einer Übertragungsstrecke zwischen einer Basiseinheit und einer mobilen Schlüsseleinheit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3040130A (en) * 1958-12-24 1962-06-19 Itt Repeater station for a bidirectional communication system
US3470418A (en) * 1967-06-06 1969-09-30 Westinghouse Electric Corp Phase comparison relaying network
US3590324A (en) * 1969-06-27 1971-06-29 Westinghouse Electric Corp Phase comparison relaying network
US3602776A (en) * 1970-04-29 1971-08-31 Westinghouse Electric Corp Quick resetting apparatus

Also Published As

Publication number Publication date
US3707651A (en) 1972-12-26
ES404296A1 (es) 1975-06-01
IT956858B (it) 1973-10-10
FR2143825A1 (enExample) 1973-02-09
SE384308B (sv) 1976-04-26
FR2143825B1 (enExample) 1976-10-29

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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