JPS5635545A - Faulty area detecting system for relay transmission line - Google Patents

Faulty area detecting system for relay transmission line

Info

Publication number
JPS5635545A
JPS5635545A JP11020679A JP11020679A JPS5635545A JP S5635545 A JPS5635545 A JP S5635545A JP 11020679 A JP11020679 A JP 11020679A JP 11020679 A JP11020679 A JP 11020679A JP S5635545 A JPS5635545 A JP S5635545A
Authority
JP
Japan
Prior art keywords
contact
repeater
faulty area
occurrence signal
oscillators
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.)
Pending
Application number
JP11020679A
Other languages
Japanese (ja)
Inventor
Susumu Oka
Takeshi Asakura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP11020679A priority Critical patent/JPS5635545A/en
Publication of JPS5635545A publication Critical patent/JPS5635545A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To decrease the number of the maintenance operators, by providing the low frequency oscillators of different frequencies with every repeater and then discriminating the frequency of the fault occurrence signal to detect the faulty area. CONSTITUTION:The low frequency oscillators SV1 and SV2 receiving the supply of the electric power from the intervention pair 3 are provided to the output terminal of each repeater. At the same time, the frequencies are set different for oscillators SV1, SV2 and so on. The oscillator SV1 monitors the feed voltage at the output terminal P of the repeater REP1-A. And in case this feed voltage drops by some fault, the relay RA works to close the contact r. In this case, the contact r interlocks the contact r'. With closured of the contact r', the fault occurrence signal sent from the oscillator SV1 is transmitted to the end office 1 via the capacitor 16 or the Zener diode 17 and the coil 13. Thus the frequency of the fault occurrence signal is discriminated at the office 1 to detect the faulty area.
JP11020679A 1979-08-31 1979-08-31 Faulty area detecting system for relay transmission line Pending JPS5635545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11020679A JPS5635545A (en) 1979-08-31 1979-08-31 Faulty area detecting system for relay transmission line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11020679A JPS5635545A (en) 1979-08-31 1979-08-31 Faulty area detecting system for relay transmission line

Publications (1)

Publication Number Publication Date
JPS5635545A true JPS5635545A (en) 1981-04-08

Family

ID=14529737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11020679A Pending JPS5635545A (en) 1979-08-31 1979-08-31 Faulty area detecting system for relay transmission line

Country Status (1)

Country Link
JP (1) JPS5635545A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882170A (en) * 1981-08-14 1983-05-17 ミシエル・ガドナ Test system detecting short circuit and release of two conductor type circuit
JPS5888955A (en) * 1981-11-20 1983-05-27 Nippon Telegr & Teleph Corp <Ntt> Automatic detection system of momentary interrupted section in telephone line

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882170A (en) * 1981-08-14 1983-05-17 ミシエル・ガドナ Test system detecting short circuit and release of two conductor type circuit
JPH0424895B2 (en) * 1981-08-14 1992-04-28 Gadona Misheru
JPS5888955A (en) * 1981-11-20 1983-05-27 Nippon Telegr & Teleph Corp <Ntt> Automatic detection system of momentary interrupted section in telephone line

Similar Documents

Publication Publication Date Title
CA2079468A1 (en) Arcing fault detector
GB1480736A (en) Electrodiathermy apparatus
US3508243A (en) Telemetry arrangements utilizing power distributing networks for measuring consumption
JPS5635545A (en) Faulty area detecting system for relay transmission line
MY100580A (en) Regulator fault protection circuit
JPS5639655A (en) N-to-one stand-by switching system of radio digital transmission
ATE24075T1 (en) SWITCHING DEVICE FOR DETECTING ARC FLASHES IN ELECTRICAL SYSTEMS.
SU1131730A1 (en) Device for checking condition of insulating joints of rail circuits
JPS6426176A (en) Automatic and real time disturbance monitoring/checking circuit network for microwave landing system
JPS57150236A (en) Channel shared type receiving device
JPS5725743A (en) Maintenance system of radio telephone system
JPS56103547A (en) Optical communication system
GB1446937A (en) Automatic systems for locating a defective portion of a feeder line of a medium voltage electrical power distribution network and for isolating the defective portion from the network
JPS57127345A (en) Detecting system of faulty area
JPS54139419A (en) Switching system for double-system transmission line
JPS56117441A (en) Suppressing method for undesired electric wave in information collecting system
JPS5772436A (en) Monitor system for repeating installation
JPS5520022A (en) Remote monitor system
GB938972A (en) Improvements in or relating to couplings for electric networks
JPS56149149A (en) Communication system of remote monitor system
GB1182990A (en) Monitoring System for Frequency Division Multiplexed Communication Channels.
JPS55147845A (en) Receiver monitoring system
JPS5539429A (en) Monitoring system for signal transmission line
JPS55154836A (en) Automatic switching control system for radio communication circuit
JPS5443607A (en) Fault detector for contact signal transmission circuit