GB1178231A - Improvements in or relating to methods and apparatus for locating faults in the conductors of cables. - Google Patents
Improvements in or relating to methods and apparatus for locating faults in the conductors of cables.Info
- Publication number
- GB1178231A GB1178231A GB615966A GB615966A GB1178231A GB 1178231 A GB1178231 A GB 1178231A GB 615966 A GB615966 A GB 615966A GB 615966 A GB615966 A GB 615966A GB 1178231 A GB1178231 A GB 1178231A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- resistance
- cable
- arm
- conductor
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Locating Faults (AREA)
Abstract
1,178,231. Locating faults in cables. POSTMASTER GENERAL. Jan. 16, 1967 [Feb.11, 1966], No.6159/66. Heading G1U. The resistive position of a fault F, Fig. 5, in a cable AB is found by connecting the cable in a bridge of which one arm includes a calibrated variable resistance R5 and the portion AF of the cable, and a second arm comprises the portion FB of the faulty cable and a length CD of "good" cable, the other arm of the bridge comprising resistance arrangements as shown. The bridge is first balanced with switch SB in position 4 and is then unbalanced by switching SB to position 5 whereby the resistance of arm DG is charged. The value of R5 required to rebalance the bridge gives the resistance X of portion AF of cable AB. The location of the fault is then calculated knowing the resistance/unit length of the cable. With switch SA, Fig.1, in position 1 and SB in any position, a circuit is obtained Fig. 2 (not shown) which is used to calibrate the meter M2. With switch SA in position 2 and SB in any position a circuit is obtained Fig. 3 (not shown) which is used to measure the insulation resistance between one conductor connected to the "Line" terminal and another connected to the "Earth" terminal. A Wheatstone bridge Fig. 4 (not shown) used to measure the resistance of a conductor connected between the "Line" and "Return" terminals is obtained by placing switch SA in position 3 and SB in any one of its first three positions. Another bridge Fig. 7 (not shown) is obtained by placing switch SA in position 5 and SB in position 4, this bridge being used to locate broken conductor faults. One arm of the bridge comprises the capacitance to earth of the broken conductor from one of its ends to the fault, a second arm comprises the capacitance to earth of the remainder of the faulty conductor plus a length of "good" conductor and the other arms comprise resistance arrangements, the bridge being supplied by an oscillator OSC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB615966A GB1178231A (en) | 1966-02-11 | 1966-02-11 | Improvements in or relating to methods and apparatus for locating faults in the conductors of cables. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB615966A GB1178231A (en) | 1966-02-11 | 1966-02-11 | Improvements in or relating to methods and apparatus for locating faults in the conductors of cables. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1178231A true GB1178231A (en) | 1970-01-21 |
Family
ID=9809491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB615966A Expired GB1178231A (en) | 1966-02-11 | 1966-02-11 | Improvements in or relating to methods and apparatus for locating faults in the conductors of cables. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1178231A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160441A1 (en) * | 1984-04-24 | 1985-11-06 | RAYCHEM CORPORATION (a Delaware corporation) | Apparatus and method for detecting and locating information about an event |
| 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 |
| CN109001519A (en) * | 2018-09-10 | 2018-12-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of electrification positioning cable outer jacket breaks the apparatus and method of protective metal shell grounding point outside |
-
1966
- 1966-02-11 GB GB615966A patent/GB1178231A/en not_active Expired
Cited By (6)
| 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 |
| EP0160441A1 (en) * | 1984-04-24 | 1985-11-06 | RAYCHEM CORPORATION (a Delaware corporation) | Apparatus and method for detecting and locating information about an event |
| US5235286A (en) | 1985-06-12 | 1993-08-10 | Raychem Corporation | Method for detecting and obtaining information about changers in variables |
| CN109001519A (en) * | 2018-09-10 | 2018-12-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of electrification positioning cable outer jacket breaks the apparatus and method of protective metal shell grounding point outside |
| CN109001519B (en) * | 2018-09-10 | 2024-01-05 | 国网江苏省电力有限公司电力科学研究院 | Device and method for locating grounding point of cable metal sheath in electrified manner |
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