GB944002A - Fault locating circuit arrangement - Google Patents

Fault locating circuit arrangement

Info

Publication number
GB944002A
GB944002A GB1785662A GB1785662A GB944002A GB 944002 A GB944002 A GB 944002A GB 1785662 A GB1785662 A GB 1785662A GB 1785662 A GB1785662 A GB 1785662A GB 944002 A GB944002 A GB 944002A
Authority
GB
United Kingdom
Prior art keywords
repeater
power
circuit
contacts
relay
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
GB1785662A
Inventor
Peter Norman
Anthony George Robbins
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1785662A priority Critical patent/GB944002A/en
Priority to CH572863A priority patent/CH414850A/en
Priority to DEJ23676A priority patent/DE1187274B/en
Publication of GB944002A publication Critical patent/GB944002A/en
Expired 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
    • H04B17/407—Monitoring; Testing of relay systems without selective localization
    • H04B17/408—Monitoring; Testing of relay systems without selective localization using successive loop-backs

Landscapes

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

Abstract

944,002. Line transmission systems; repeater fault locating. STANDARD TELEPHONES & CABLES Ltd. May 9, 1962, No. 17856/62. Heading H4R. In a fault locating circuit arrangement for a system in which the power supply circuits for a number of repeaters, C and E, Fig. 1, are connected in series with a common source of power 3, a slow acting relay at each repeater has its winding 5 connected in the power supply circuit and its normally closed contacts 8 connected across the circuit on the side of the repeater remote from the power source. To find the location of a fault, power is applied to the circuit at terminals 3 and a signal source across terminals 10. After a time, sufficient to allow the amplifiers in the repeater to warm up and the signal applied to terminals 10 to be transmitted via repeater C and contacts 8 back to an indicator 12, relay 5 operates and contacts 8 open and allow power to be transmitted to the following repeater E where a similar process occurs. The voltage across the constant current source 3, read on meter 9, indicates how many repeaters are in circuit while the burst of signal received at indicator 12 during the time between the warming up of each repeater and the opening of the contacts 8 associated with each repeater indicates the correct functioning of the amplifiers in that repeater. A preferred method of obtaining the delay in operation of relay 5 is illustrated in Fig. 3 in which a constant voltage source to supply the repeater amplifier is established across an avalanche type diode 14. The relay coil 5, in series with a thermistor 13 is connected across the stabilised supply with the heater of the thermistor connected across a low resistance 15 in series with the diode.
GB1785662A 1962-05-09 1962-05-09 Fault locating circuit arrangement Expired GB944002A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1785662A GB944002A (en) 1962-05-09 1962-05-09 Fault locating circuit arrangement
CH572863A CH414850A (en) 1962-05-09 1963-05-07 Fault location device
DEJ23676A DE1187274B (en) 1962-05-09 1963-05-09 Method and circuit arrangement for fault determination

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1785662A GB944002A (en) 1962-05-09 1962-05-09 Fault locating circuit arrangement

Publications (1)

Publication Number Publication Date
GB944002A true GB944002A (en) 1963-12-11

Family

ID=10102420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1785662A Expired GB944002A (en) 1962-05-09 1962-05-09 Fault locating circuit arrangement

Country Status (3)

Country Link
CH (1) CH414850A (en)
DE (1) DE1187274B (en)
GB (1) GB944002A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410968A (en) * 1964-06-26 1968-11-12 Int Standard Electric Corp Communication systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2554718C2 (en) * 1975-12-05 1982-11-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Circuit arrangement for determining the location of the fault
DE3145437A1 (en) * 1981-11-16 1983-05-26 Siemens AG, 1000 Berlin und 8000 München SWITCHING DEVICE FOR AC-PARALLEL REMOTE POWER SUPPLY

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410968A (en) * 1964-06-26 1968-11-12 Int Standard Electric Corp Communication systems

Also Published As

Publication number Publication date
CH414850A (en) 1966-06-15
DE1187274B (en) 1965-02-18

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