JPS5616878A - Measuring method for cable accident point - Google Patents
Measuring method for cable accident pointInfo
- Publication number
- JPS5616878A JPS5616878A JP9299079A JP9299079A JPS5616878A JP S5616878 A JPS5616878 A JP S5616878A JP 9299079 A JP9299079 A JP 9299079A JP 9299079 A JP9299079 A JP 9299079A JP S5616878 A JPS5616878 A JP S5616878A
- Authority
- JP
- Japan
- Prior art keywords
- pulses
- line
- circuits
- phase line
- accident
- 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.)
- Granted
Links
Landscapes
- Locating Faults (AREA)
Abstract
PURPOSE: To reduce intervention of error to time difference measurement, by dulling respective traveling-wave pulses, which come to the near-end of an accident phase line and the near-end of an indefectible phase line, into the same rise inclination by an integrating circuit.
CONSTITUTION: Far-ends A and B of accident phase line X and indefectible phase line Y are short-circuited and DC voltage E is applied gradually from near-end C of line X to cause discharge at accident point F. Two traveling-wave pulses are generated on a basis of this discharge, and pulse P1 returning through line X comes to near-end C, and pulse P2 passing through far-ends A and B and line Y comes to near-end D. These pulses are integrated by integrating circuits 112 and 12. Here, by selecting time constants of circuits 112 and 12 as large values, rise inclination of integrated waveforms of pulses P1 and P2 becomes equal approximately. Consequently, time delays of outputs of circuits 117 and 17 for pulses P1 and P2 become the same value by equalizing potentials of trigger levels of level discriminating circuits 117 and 17. Gate circuit 4 is gated by these pulses P1 and P2, so that an accurate measured value can be obtained from counting circuit 6.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9299079A JPS5616878A (en) | 1979-07-21 | 1979-07-21 | Measuring method for cable accident point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9299079A JPS5616878A (en) | 1979-07-21 | 1979-07-21 | Measuring method for cable accident point |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5616878A true JPS5616878A (en) | 1981-02-18 |
| JPS6262299B2 JPS6262299B2 (en) | 1987-12-25 |
Family
ID=14069799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9299079A Granted JPS5616878A (en) | 1979-07-21 | 1979-07-21 | Measuring method for cable accident point |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5616878A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60100061A (en) * | 1983-11-04 | 1985-06-03 | Showa Electric Wire & Cable Co Ltd | Apparatus for measuring partial discharge generating position of cable |
| JPS6237697A (en) * | 1985-07-26 | 1987-02-18 | Yunaito Board:Kk | Heat exchanging element |
| JPS6255569A (en) * | 1985-09-04 | 1987-03-11 | Showa Electric Wire & Cable Co Ltd | Location of fault point for cable line |
| JP2013257150A (en) * | 2012-06-11 | 2013-12-26 | Mitsubishi Electric Corp | Insulation defect position locating device and insulation defect position locating method for power cable |
-
1979
- 1979-07-21 JP JP9299079A patent/JPS5616878A/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60100061A (en) * | 1983-11-04 | 1985-06-03 | Showa Electric Wire & Cable Co Ltd | Apparatus for measuring partial discharge generating position of cable |
| JPS6237697A (en) * | 1985-07-26 | 1987-02-18 | Yunaito Board:Kk | Heat exchanging element |
| JPS6255569A (en) * | 1985-09-04 | 1987-03-11 | Showa Electric Wire & Cable Co Ltd | Location of fault point for cable line |
| JP2013257150A (en) * | 2012-06-11 | 2013-12-26 | Mitsubishi Electric Corp | Insulation defect position locating device and insulation defect position locating method for power cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6262299B2 (en) | 1987-12-25 |
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