GB1508351A - Apparatus for the location of faults in cables - Google Patents
Apparatus for the location of faults in cablesInfo
- Publication number
- GB1508351A GB1508351A GB223575A GB223575A GB1508351A GB 1508351 A GB1508351 A GB 1508351A GB 223575 A GB223575 A GB 223575A GB 223575 A GB223575 A GB 223575A GB 1508351 A GB1508351 A GB 1508351A
- Authority
- GB
- United Kingdom
- Prior art keywords
- digital
- memory
- signal
- data
- waveform
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/11—Locating faults in cables, transmission lines, or networks using pulse reflection methods
Abstract
1508351 Cable fault location ELECTRICITY COUNCIL 16 Jan 1976 [17 Jan 1975] 2235/75 Heading H4D Apparatus for location of a fault in a cable comprises a generator which supplies a signal to one end of the cable, and a digital transient recorder which records the waveform of the resultant reflected signal from the cable, and includes means for repetitively sampling the waveform to be recorded, A to D conversion means arranged to convert the sample signal amplitudes into digital form, and a digital signal store for recording the digitized sampled information. As described, an impulse generator producing current waveforms in a linear coupler as described in Specification 1,508,352 is used, although it is stated that a voltage waveform may alternatively be utilized. The output signal from the linear coupler 20 is sampled at an accurately controlled rate typically 29 MHz in a sampler 40 controlled by a clock frequency signal generator 41 and the amplitudes of the output samples are converted from analogue to digital form in an analogue-todigital converter 42, typically providing a 6-bit output thereby enabling 64 different amplitude levels to be recorded. The digital output from converter 42 is applied, via a switch 43, to a memory 44 which is typically a semi-conductor memory. When it is required to examine the waveform, the switch 43 is put in the re-play condition and the stored signal in memory 44 is fed both to a digital-to-analogue converter 45 and is also fed back via the switch 43 to be re-stored in the memory 44. The output of the digital-to-analogue converter 45 may be applied to a cathode ray oscilloscope 46 and/or to an automatic plotter 47. The stored signal in the memory may be fed to a paper tape perforator 48 to produce a permanent record. It may be fed to numerical indicators 49 if numerical information is required, for example for communication to a remote station. The output of the memory additionally or alternatively may be applied to data transmission equipment 50 for feeding over a data link 51 to a central station. The central station has a digital data processor 52 including a memory 53 for receiving the transmitted data. The incoming data can be compared in the processor with pre-recorded information representative of the waveform to be expected or pre-computed information representative of possible fault conditions from a data store 54. Additionally or alternatively a display device 55 fed from a digital-to-analogue converter may be provided to enable the incoming data to be displayed visually in analogue form. In operation, the complete waveform from an applied impulse would be stored in the memory and, when the recording cycle is complete, the stored data would be replayed through the digitalto-analogue converter 45. The re-play may be at a faster or slower rate than the original sampling and is usually made repetitive by recirculating the stored data through the switch 43 so that a steady trace is obtained on the display oscilloscope 46.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB223575A GB1508351A (en) | 1976-01-16 | 1976-01-16 | Apparatus for the location of faults in cables |
BE190681A BE870733Q (en) | 1976-01-16 | 1978-09-25 | IMPROVEMENTS TO A DEVICE FOR LOCATING FAULTS IN CABLES |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB223575A GB1508351A (en) | 1976-01-16 | 1976-01-16 | Apparatus for the location of faults in cables |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1508351A true GB1508351A (en) | 1978-04-26 |
Family
ID=9735984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB223575A Expired GB1508351A (en) | 1976-01-16 | 1976-01-16 | Apparatus for the location of faults in cables |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE870733Q (en) |
GB (1) | GB1508351A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475079A (en) * | 1978-05-31 | 1984-10-02 | Bicc Public Limited Company | Apparatus for locating faults in electric cables |
CN102508121A (en) * | 2011-11-08 | 2012-06-20 | 西安交通大学 | Direct-current line single-terminal fault location method for multiterminal flexible direct-current transmission system |
EP2446284A4 (en) * | 2009-06-22 | 2016-12-28 | Utilx Corp | On-line time domain reflectometer system |
WO2018196926A1 (en) * | 2017-04-26 | 2018-11-01 | Lisa Dräxlmaier GmbH | Test apparatus and method for measuring the impedance of data cables for a vehicle in a spatially resolved manner |
CN109782100A (en) * | 2019-03-13 | 2019-05-21 | 海检检测有限公司 | A kind of test device and test method for the pincers calibration of automotive electronics capacitive coupling |
CN116953425A (en) * | 2023-07-03 | 2023-10-27 | 国网四川省电力公司成都供电公司 | Power transmission cable metal sheath grounding fault positioning method based on fixed frequency alternating current coupling |
-
1976
- 1976-01-16 GB GB223575A patent/GB1508351A/en not_active Expired
-
1978
- 1978-09-25 BE BE190681A patent/BE870733Q/en active
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4475079A (en) * | 1978-05-31 | 1984-10-02 | Bicc Public Limited Company | Apparatus for locating faults in electric cables |
EP2446284A4 (en) * | 2009-06-22 | 2016-12-28 | Utilx Corp | On-line time domain reflectometer system |
CN102508121A (en) * | 2011-11-08 | 2012-06-20 | 西安交通大学 | Direct-current line single-terminal fault location method for multiterminal flexible direct-current transmission system |
CN102508121B (en) * | 2011-11-08 | 2015-03-04 | 西安交通大学 | Direct-current line single-terminal fault location method for multiterminal flexible direct-current transmission system |
WO2018196926A1 (en) * | 2017-04-26 | 2018-11-01 | Lisa Dräxlmaier GmbH | Test apparatus and method for measuring the impedance of data cables for a vehicle in a spatially resolved manner |
CN109782100A (en) * | 2019-03-13 | 2019-05-21 | 海检检测有限公司 | A kind of test device and test method for the pincers calibration of automotive electronics capacitive coupling |
CN116953425A (en) * | 2023-07-03 | 2023-10-27 | 国网四川省电力公司成都供电公司 | Power transmission cable metal sheath grounding fault positioning method based on fixed frequency alternating current coupling |
CN116953425B (en) * | 2023-07-03 | 2024-02-09 | 国网四川省电力公司成都供电公司 | Power transmission cable metal sheath grounding fault positioning method based on fixed frequency alternating current coupling |
Also Published As
Publication number | Publication date |
---|---|
BE870733Q (en) | 1979-01-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940116 |