GB1352124A – Cable fault location
– Google Patents
GB1352124A – Cable fault location
– Google Patents
Cable fault location
Info
Publication number
GB1352124A
GB1352124A
GB3323970A
GB1352124DA
GB1352124A
GB 1352124 A
GB1352124 A
GB 1352124A
GB 3323970 A
GB3323970 A
GB 3323970A
GB 1352124D A
GB1352124D A
GB 1352124DA
GB 1352124 A
GB1352124 A
GB 1352124A
Authority
GB
United Kingdom
Prior art keywords
cable
gate
frequency
oscillation
fault
Prior art date
1970-07-08
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
GB3323970A
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.)
Electricity Council
Original Assignee
Electricity Council
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.)
1970-07-08
Filing date
1970-07-08
Publication date
1974-05-08
1970-07-08
Application filed by Electricity Council
filed
Critical
Electricity Council
1974-05-08
Publication of GB1352124A
publication
Critical
patent/GB1352124A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
Abstract
1352124 Locating faults in electric cables ELECTRICITY COUNCIL 30 June 1971 [8 July 1970] 33239/70 Heading G1U The distance to a fault in a power cable is determined by inducing resonance in the cable between the fault and one end of the cable, and determining the resonant frequency. The resonance is induced between the fault 19 and the far end 16 by shock exciting the cable at its near end 14, either by discharging a capacitor 10 into the cable Fig. 1 or by leaving a charged capacitor connected to the cable until the fault breaks down Fig. 7, (not shown). The frequency of the induced oscillation is determined Fig. 4 by detecting (34) the negative-going zero crossings and using these to gate (49) clock pulses (54) to a counter 55 for, say, four consecutive cycles of the oscillation. To check against spurious operation of the gate, the test may then be repeated for, say, two consecutive cycles. The zero crossings detector 34 exhibits hysteresis to minimise erroneous gate actuation due to noise, and the gate 49 is not opened for the first four cycles of the oscillation to allow time for initial transients to die down. Two methods of calibrating the frequencymeasuring circuit are described. (i) If the wave propagation velocity in the cable is known, a fixed-frequency oscillator 30 is used to open the gate 49 for a fixed period, and the clock frequency adjusted to give a required reading on the counter. (ii) If the velocity is not known, the clock pulse generator is adjusted on the basis of tests made on a good conductor of the cable of known length. Since neither method of calibration will be entirely accurate owing to the dependence of the velocity on the frequency of the oscillation in the cable, in use the clock frequency may be swept between the values determined by (i) and (ii).
GB3323970A
1970-07-08
1970-07-08
Cable fault location
Expired
GB1352124A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3323970
1970-07-08
Publications (1)
Publication Number
Publication Date
GB1352124A
true
GB1352124A
(en)
1974-05-08
Family
ID=10350347
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3323970A
Expired
GB1352124A
(en)
1970-07-08
1970-07-08
Cable fault location
Country Status (6)
Country
Link
US
(1)
US3781665A
(en)
JP
(1)
JPS5438492Y2
(en)
BE
(1)
BE769624A
(en)
CH
(1)
CH527428A
(en)
FR
(1)
FR2098247B3
(en)
GB
(1)
GB1352124A
(en)
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0160440A1
(en)
*
1984-04-11
1985-11-06
RAYCHEM CORPORATION (a Delaware corporation)
Apparatus for detecting and obtaining imformation about changes in variables
US5015958A
(en)
1983-06-30
1991-05-14
Raychem Corporation
Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors
US5235286A
(en)
1985-06-12
1993-08-10
Raychem Corporation
Method for detecting and obtaining information about changers in variables
US5382909A
(en)
1983-06-30
1995-01-17
Raychem Corporation
Method for detecting and obtaining information about changes in variables
Families Citing this family (24)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4316139A
(en)
*
1979-06-13
1982-02-16
International Telephone And Telegraph Corporation
Method and apparatus for determining the location of an arc in a waveguide transmission line or the like
US4491782A
(en)
*
1981-04-07
1985-01-01
Bellis Edward J
Apparatus for locating faults in electric cables
US4471294A
(en)
*
1982-10-29
1984-09-11
The United States Of America As Represented By The Secretary Of The Army
Electrical conduit defect location
US4597183A
(en)
*
1983-02-24
1986-07-01
Standard Oil Company (Indiana)
Methods and apparatus for measuring a length of cable suspending a well logging tool in a borehole
US4914394A
(en)
*
1986-07-31
1990-04-03
Electromagnetic Techology, Inc.
Pocket-size time domain reflectometer
US4797621A
(en)
*
1987-07-08
1989-01-10
Midwesco, Inc.
Leak detector and locator utilizing time domain reflectometry and sampling techniques
US5268644A
(en)
*
1990-04-03
1993-12-07
Ford Motor Company
Fault detection and isolation in automotive wiring harness by time-domain reflectometry
US5264796A
(en)
*
1990-04-03
1993-11-23
Ford Motor Company
Fault detection and isolation in automotive wiring harness including dedicated test line
US5463317A
(en)
*
1994-06-29
1995-10-31
The Boeing Company
Shield integrity monitor
US5729144A
(en)
*
1996-12-02
1998-03-17
Cummins; Kenneth L.
Systems and methods for determining location of a fault on an electric utility power distribution system
US5977773A
(en)
*
1997-08-15
1999-11-02
The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
Non-intrusive impedance-based cable tester
US5894223A
(en)
*
1997-09-24
1999-04-13
The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
Non-intrusive cable tester
JPH11183553A
(en)
*
1997-12-18
1999-07-09
Tohoku Electric Power Co Inc
System and method for location of surge in transmission line
US6160405A
(en)
*
1998-03-30
2000-12-12
Jovial Test Equipment, Inc.
Method and apparatus for remotely changing signal characteristics of a signal generator
US6442239B1
(en)
*
1999-07-23
2002-08-27
Communications Manufacturing Company
Telephone line longitudinal balance tester and method
US6677761B1
(en)
2001-12-12
2004-01-13
The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration
Wire insulation defect detector
RU2003137665A
(en)
*
2003-12-29
2005-06-10
Александр Владимирович Лопатин (RU)
METHOD FOR DETERMINING DISTRIBUTED NETWORK PARAMETERS
US7660893B2
(en)
*
2007-09-04
2010-02-09
International Business Machines Corporation
Method and system for monitoring and instantly identifying faults in data communication cables
EP2120058A2
(en)
*
2008-05-14
2009-11-18
Acterna, LLC
Locating a low-resistance fault in an electrical cable
US9413519B2
(en)
2014-04-11
2016-08-09
Thomas & Betts International, Inc.
Wireless transmission synchronization using a power line signal
WO2016137424A1
(en)
*
2015-02-23
2016-09-01
Ge Aviation Systems Llc
Method and apparatus for an electrical fault detecting system for a cable
US10663532B2
(en)
*
2017-10-24
2020-05-26
Hamilton Sundstrand Corporation
Method of testing cable shield performance
CN111766193B
(en)
*
2020-07-08
2022-06-14
广东电网有限责任公司
Power cable metal shielding layer corrosion defect detection device and method thereof
RU209705U1
(en)
*
2021-07-06
2022-03-18
Общество с ограниченной ответственностью Торговый дом “Кемеровский экспериментальный завод средств безопасности” (ООО ТД “КЭЗСБ”)
CABLE INSULATION TESTING DEVICE
1970
1970-07-08
GB
GB3323970A
patent/GB1352124A/en
not_active
Expired
1971
1971-07-07
BE
BE769624A
patent/BE769624A/en
unknown
1971-07-07
CH
CH997671A
patent/CH527428A/en
not_active
IP Right Cessation
1971-07-08
FR
FR7124979A
patent/FR2098247B3/fr
not_active
Expired
1971-07-08
US
US00160754A
patent/US3781665A/en
not_active
Expired – Lifetime
1971-08-03
JP
JP1973147767U
patent/JPS5438492Y2/ja
not_active
Expired
Cited By (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US5015958A
(en)
1983-06-30
1991-05-14
Raychem Corporation
Elongate sensors comprising conductive polymers, and methods and apparatus using such sensors
US5382909A
(en)
1983-06-30
1995-01-17
Raychem Corporation
Method for detecting and obtaining information about changes in variables
EP0160440A1
(en)
*
1984-04-11
1985-11-06
RAYCHEM CORPORATION (a Delaware corporation)
Apparatus for detecting and obtaining imformation about changes in variables
US5235286A
(en)
1985-06-12
1993-08-10
Raychem Corporation
Method for detecting and obtaining information about changers in variables
Also Published As
Publication number
Publication date
DE2133899A1
(en)
1972-01-20
FR2098247B3
(en)
1974-04-05
CH527428A
(en)
1972-08-31
US3781665A
(en)
1973-12-25
DE2133899B2
(en)
1976-03-04
BE769624A
(en)
1971-11-16
JPS5438492Y2
(en)
1979-11-16
FR2098247A3
(en)
1972-03-10
JPS49135728U
(en)
1974-11-21
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Legal Events
Date
Code
Title
Description
1974-09-18
PS
Patent sealed [section 19, patents act 1949]
1991-07-31
PE20
Patent expired after termination of 20 years
