JPS5758421A - Pilot signal monitoring system for relay device - Google Patents

Pilot signal monitoring system for relay device

Info

Publication number
JPS5758421A
JPS5758421A JP13379680A JP13379680A JPS5758421A JP S5758421 A JPS5758421 A JP S5758421A JP 13379680 A JP13379680 A JP 13379680A JP 13379680 A JP13379680 A JP 13379680A JP S5758421 A JPS5758421 A JP S5758421A
Authority
JP
Japan
Prior art keywords
pilot signal
relay device
pair
level
monitoring system
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
JP13379680A
Other languages
Japanese (ja)
Inventor
Kazuyuki Odaka
Koichi Saito
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 JP13379680A priority Critical patent/JPS5758421A/en
Publication of JPS5758421A publication Critical patent/JPS5758421A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To detect the location of a relay device in failure of a pilot signal, by discriminating if the pilot signal is greater than a normal range, controlling a current flowing to an interposed pair, and detecting the direction of current at a terminal station. CONSTITUTION:In a relay device 2, element assemblies in which rectifying elements 12, 12' are combined in series with switching elements 11, 11' so that they are in opposite polarity, are connected in parallel. In a terminal station 1, an AC power supply 15, DC ammeters 13, 13' with rectifying elements 12, 12' in series and in opposite polarity, and an AC voltmeter 14 are provided. If the level of a pilot signal is increased to the reference level, the switching element is controlled by a pilot signal amplifier 6 and a pointer of the DC ammeter 13 is deflected. Thus, a failed part is discriminated from the resistance value of an interposed pair 3, and failed level of the pilot signal can be discriminated from the polarity of a current flowing to a pair 4.
JP13379680A 1980-09-26 1980-09-26 Pilot signal monitoring system for relay device Pending JPS5758421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13379680A JPS5758421A (en) 1980-09-26 1980-09-26 Pilot signal monitoring system for relay device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13379680A JPS5758421A (en) 1980-09-26 1980-09-26 Pilot signal monitoring system for relay device

Publications (1)

Publication Number Publication Date
JPS5758421A true JPS5758421A (en) 1982-04-08

Family

ID=15113215

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13379680A Pending JPS5758421A (en) 1980-09-26 1980-09-26 Pilot signal monitoring system for relay device

Country Status (1)

Country Link
JP (1) JPS5758421A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109696625A (en) * 2019-02-27 2019-04-30 上海地铁维护保障有限公司 Portable relay test-device and test method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109696625A (en) * 2019-02-27 2019-04-30 上海地铁维护保障有限公司 Portable relay test-device and test method

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