GB561523A - Improvements in or relating to electrical measuring instruments - Google Patents
Improvements in or relating to electrical measuring instrumentsInfo
- Publication number
- GB561523A GB561523A GB1559742A GB1559742A GB561523A GB 561523 A GB561523 A GB 561523A GB 1559742 A GB1559742 A GB 1559742A GB 1559742 A GB1559742 A GB 1559742A GB 561523 A GB561523 A GB 561523A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potentiometer
- switch
- length
- galvanometer
- fault
- 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
561,523. Locating faults. LOVE, A. Nov. 5, 1942, No. 15597. [Class 37] Testing apparatus for locating line faults in cables comprises a potentiometer having an adjustable contact arm or its equivalent that is movable relatively to a scale calibrated directly in units of length. A twincore cable to be tested has one wire 1 connected between terminals 3, 5 and the other wire 2, in which the fault 16 occurs, connected to' terminal 4. Across the terminals 3, 5 are connected in series a battery 6 and lamp 7. One end of a potentiometer resistance 11 is connected through a two-way switch 17 to either of the terminals 4, 5. The contact arm 18 of the potentiometer is connected through a galvanometer 10 and key 9 to the terminal 3. Potential is applied to the potentiometer from a battery 13 controlled by a switch 14 and shunted by a signal lamp 15, a rheostat 12 serving for adjustment. With the switch 17 on its left-hand contact the arm 18 is set to the length L of the conductor 1 on a scale 19 and the rheostat 12 is adjusted to give balance on the galvanometer 10. The switch 17 is then changed to the right-hand position and the potentiometer 11 adjusted to restore balance. The length'D to the fault is then indicated on the scale 19, which may be graduated in units of length or in percentages of the total length L. Alternatively, the contact arm 18 mav be connected to the switch 17 and the end of the potentiometer resistance to the galvanometer 10. A fault to earth may be similarly located.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1559742A GB561523A (en) | 1942-11-05 | 1942-11-05 | Improvements in or relating to electrical measuring instruments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1559742A GB561523A (en) | 1942-11-05 | 1942-11-05 | Improvements in or relating to electrical measuring instruments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB561523A true GB561523A (en) | 1944-05-23 |
Family
ID=10061983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1559742A Expired GB561523A (en) | 1942-11-05 | 1942-11-05 | Improvements in or relating to electrical measuring instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB561523A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3284704A (en) * | 1962-04-10 | 1966-11-08 | Western Electric Co | Method for determining the magnitude of an open fault in one of a pair of current carrying conductors by measuring the voltage across a capacitance in series with the capacitance of said pair |
| 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 |
-
1942
- 1942-11-05 GB GB1559742A patent/GB561523A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3284704A (en) * | 1962-04-10 | 1966-11-08 | Western Electric Co | Method for determining the magnitude of an open fault in one of a pair of current carrying conductors by measuring the voltage across a capacitance in series with the capacitance of said pair |
| 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 |
| US5235286A (en) | 1985-06-12 | 1993-08-10 | Raychem Corporation | Method for detecting and obtaining information about changers in variables |
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