JPS54109311A - Fault point detection system - Google Patents

Fault point detection system

Info

Publication number
JPS54109311A
JPS54109311A JP1697478A JP1697478A JPS54109311A JP S54109311 A JPS54109311 A JP S54109311A JP 1697478 A JP1697478 A JP 1697478A JP 1697478 A JP1697478 A JP 1697478A JP S54109311 A JPS54109311 A JP S54109311A
Authority
JP
Japan
Prior art keywords
feeding
fault
point detection
reactor
constant
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
JP1697478A
Other languages
Japanese (ja)
Inventor
Isao Sakuyama
Takashi Yokogawa
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP1697478A priority Critical patent/JPS54109311A/en
Publication of JPS54109311A publication Critical patent/JPS54109311A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/44—Arrangements for feeding power to a repeater along the transmission line

Landscapes

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

Abstract

PURPOSE:To obtain a fault-point detection system which can secure high reliability by allowing a signal transmission system which requires remote feeding to use two feeding systems, constant-current feeding for a main signal system and constant- voltage feeding for a fault search pilot signal system. CONSTITUTION:To the return line of the communication transmission section composed of transmission line K, repeater REPs 1 and 1', and REPs 2 and 2' are connected by adding one fault-point detection circuit. The fault-point detection circuit consists of oversaturation reactor T, voltage-dividing resistances Ra and Ra', rectifier circuit Di, supervisory relay RL, and adjusting resistance Rb. In case of normal feeding, a current flows to windings N1 and N1, of reactor T to decrease the impedance at the N2 sides, relay RL does not operate and contact (rl) is broken, with the section broken, no current flows to reactor T right before the disconnected section to increase the impedance at the N2 side, relay RL operates because of the constant-voltage feeding of the pilot signal system, and contact (rl) makes. Here, a fault point can be decided by detecting the pilot signal frequency.
JP1697478A 1978-02-15 1978-02-15 Fault point detection system Pending JPS54109311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1697478A JPS54109311A (en) 1978-02-15 1978-02-15 Fault point detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1697478A JPS54109311A (en) 1978-02-15 1978-02-15 Fault point detection system

Publications (1)

Publication Number Publication Date
JPS54109311A true JPS54109311A (en) 1979-08-27

Family

ID=11931033

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1697478A Pending JPS54109311A (en) 1978-02-15 1978-02-15 Fault point detection system

Country Status (1)

Country Link
JP (1) JPS54109311A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006044271A (en) * 2004-08-05 2006-02-16 Polyon Barkai Industries (1993) Ltd Insulation structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006044271A (en) * 2004-08-05 2006-02-16 Polyon Barkai Industries (1993) Ltd Insulation structure

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