NO116167B - - Google Patents

Info

Publication number
NO116167B
NO116167B NO166451A NO16645167A NO116167B NO 116167 B NO116167 B NO 116167B NO 166451 A NO166451 A NO 166451A NO 16645167 A NO16645167 A NO 16645167A NO 116167 B NO116167 B NO 116167B
Authority
NO
Norway
Prior art keywords
carrier frequency
disturbance
pulse
blocking
time
Prior art date
Application number
NO166451A
Other languages
English (en)
Norwegian (no)
Inventor
K Jonsson
S Pedersen
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of NO116167B publication Critical patent/NO116167B/no

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00Details of emergency protective circuit arrangements
    • H02H1/0061Details of emergency protective circuit arrangements concerning transmission of signals
    • H02H1/0076Details of emergency protective circuit arrangements concerning transmission of signals by superposition on the watched current

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Selective Calling Equipment (AREA)
  • Emergency Protection Circuit Devices (AREA)
NO166451A 1966-01-21 1967-01-18 NO116167B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE78766 1966-01-21

Publications (1)

Publication Number Publication Date
NO116167B true NO116167B (de) 1969-02-10

Family

ID=20257091

Family Applications (1)

Application Number Title Priority Date Filing Date
NO166451A NO116167B (de) 1966-01-21 1967-01-18

Country Status (4)

Country Link
CH (1) CH448253A (de)
GB (1) GB1171824A (de)
NO (1) NO116167B (de)
SE (1) SE220386C1 (de)

Also Published As

Publication number Publication date
CH448253A (de) 1967-12-15
GB1171824A (en) 1969-11-26
SE220386C1 (de) 1968-05-07

Similar Documents

Publication Publication Date Title
US4922368A (en) Method and apparatus for detecting and discriminating faults in transmission circuits
KR950001370B1 (ko) 전력선 통신시스템용 스위치 바이패스 회로
US2229089A (en) Switching of spare channel
US4119815A (en) Central station system including secondary communication path established through commercial telephone network
US2173154A (en) Telecontrol system
US5592354A (en) Audio bandwidth interface apparatus for pilot wire relays
CA2069689A1 (en) Remote transmission device by on-line carrier currents designed for control, and monitoring of an electrical power distribution system, notably medium voltage
NO166451B (no) Fremgangsmaate for fremstilling av en loesning av en vannloeselig polymer.
US10411462B2 (en) Medium voltage power supply
US4205360A (en) Power line carrier apparatus
US3796920A (en) Arrangement for a repeatered power line carrier system that provides protective relaying
US2913711A (en) Signal control system
NO116167B (de)
US2366660A (en) Transmission line monitor
US3904827A (en) System for locating faulty line repeaters of repeater stations in a transmission line
CS248702B2 (en) Connection of the remonte control carrier frequency with duplex operation for the loaders with cutting cylinders
US10340060B1 (en) Overcurrent protection devices and circuits for shielded cables
Patterson et al. Directional comparison blocking system fundamentals
US1634286A (en) Telegraph circuits
US2897406A (en) Frequency-shift carrier distance relay
US1735041A (en) Carrier-telegraph alarm system
KR200142604Y1 (ko) 디지탈 통신기기용 분배기 선로 보상장치
US2157237A (en) Fire alarm signaling system
JPH0528927B2 (de)
US1501174A (en) Switching system