JPS6413472A - Method for measuring accident point of cable - Google Patents
Method for measuring accident point of cableInfo
- Publication number
- JPS6413472A JPS6413472A JP17061987A JP17061987A JPS6413472A JP S6413472 A JPS6413472 A JP S6413472A JP 17061987 A JP17061987 A JP 17061987A JP 17061987 A JP17061987 A JP 17061987A JP S6413472 A JPS6413472 A JP S6413472A
- Authority
- JP
- Japan
- Prior art keywords
- accident
- resistances
- current
- resistance value
- values
- 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.)
- Pending
Links
Landscapes
- Locating Faults (AREA)
Abstract
PURPOSE:To take a measurement without using any mechanically movable part by short-circuiting both far ends of a normal line and an accident cable line and measuring the values of voltage applied to fixed resistances when a current is supplied to their near ends through the fixed resistances. CONSTITUTION:The far ends C and D of the normal cable line (length L and resistance value R3) and accident cable line 3 (resistance value R4+R5) which are equal in overall length and total resistance value are short-circuited, and a voltage E is applied from a DC power source 5 to the near ends A and B through the fixed resistors 6 and 7 (whose resistance values R1 and R2 are equal to each other). If a ground fault accident occurs at a point P, the accident point P is grounded through a resistance Rf. Then a current I1 flows through the resistances R1, R3, R5, and Rf in order and a current I2 flows through resistances R2, R4, and Rf in order to develop voltages V1 and V2 across the resistors 6 and 7. Their voltage values re detected by voltmeters 8 and 9. Consequently, the position of the accident point P is calculated from BP=l=L(R3-(R 1+R3).(V2-V1)/(V1+V2)/R3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17061987A JPS6413472A (en) | 1987-07-08 | 1987-07-08 | Method for measuring accident point of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17061987A JPS6413472A (en) | 1987-07-08 | 1987-07-08 | Method for measuring accident point of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6413472A true JPS6413472A (en) | 1989-01-18 |
Family
ID=15908229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17061987A Pending JPS6413472A (en) | 1987-07-08 | 1987-07-08 | Method for measuring accident point of cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6413472A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021056203A (en) * | 2019-09-30 | 2021-04-08 | 株式会社和田電業社 | Fault point distance detector |
| JP2021196334A (en) * | 2020-06-12 | 2021-12-27 | 希望 田中 | High-speed and high-precision exploration system for cable leakage point |
-
1987
- 1987-07-08 JP JP17061987A patent/JPS6413472A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021056203A (en) * | 2019-09-30 | 2021-04-08 | 株式会社和田電業社 | Fault point distance detector |
| JP2021196334A (en) * | 2020-06-12 | 2021-12-27 | 希望 田中 | High-speed and high-precision exploration system for cable leakage point |
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