JPS6435281A - Method for diagnosing dielectric breakdown of power cable - Google Patents
Method for diagnosing dielectric breakdown of power cableInfo
- Publication number
- JPS6435281A JPS6435281A JP19108387A JP19108387A JPS6435281A JP S6435281 A JPS6435281 A JP S6435281A JP 19108387 A JP19108387 A JP 19108387A JP 19108387 A JP19108387 A JP 19108387A JP S6435281 A JPS6435281 A JP S6435281A
- Authority
- JP
- Japan
- Prior art keywords
- power cable
- component
- earth
- secondary winding
- voltage side
- 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
- Testing Relating To Insulation (AREA)
Abstract
PURPOSE:To diagnose the dielectric breakdown of a power cable on the basis of the time characteristic of a DC component, by detecting the DC component from the charge current flowing between the lower voltage side of the secondary winding of a charging AC transformer and the earth in such a state that the high voltage side of said secondary winding is connected to the conductor of the power cable. CONSTITUTION:A charging AC transformer 1 insulated from the earth is connected to a power cable 100 being an object to be measured and a DC component detector 4 is inserted between the low voltage side of the secondary winding thereof and the earth to detect the DC component among the charge currents I2, I3, I4, I5, I6 flowing to the earth from the low voltage side of the secondary winding and the polarity, magnitude and time characteristic of the detected component are analyzed. On the basis of the analytical result, the presence, magnitude and generating direction of the water tree in the cable insulator are discriminated to judge whether the use of the power cable must be continued.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19108387A JPS6435281A (en) | 1987-07-29 | 1987-07-29 | Method for diagnosing dielectric breakdown of power cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19108387A JPS6435281A (en) | 1987-07-29 | 1987-07-29 | Method for diagnosing dielectric breakdown of power cable |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435281A true JPS6435281A (en) | 1989-02-06 |
Family
ID=16268577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19108387A Pending JPS6435281A (en) | 1987-07-29 | 1987-07-29 | Method for diagnosing dielectric breakdown of power cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435281A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05142290A (en) * | 1991-11-15 | 1993-06-08 | Tokyo Electric Power Co Inc:The | Diagnosing method of insulation of cv cable |
US5276401A (en) * | 1990-01-09 | 1994-01-04 | Hitachi Cable, Ltd. | Method for diagnosing an insulation deterioration of an electric apparatus |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60225072A (en) * | 1984-04-23 | 1985-11-09 | Hitachi Cable Ltd | Diagnosis of deterioration in insulation for power cable |
JPS6291868A (en) * | 1985-10-17 | 1987-04-27 | Hitachi Cable Ltd | Diagnostic method for insulating deterioration of electric equipment |
-
1987
- 1987-07-29 JP JP19108387A patent/JPS6435281A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60225072A (en) * | 1984-04-23 | 1985-11-09 | Hitachi Cable Ltd | Diagnosis of deterioration in insulation for power cable |
JPS6291868A (en) * | 1985-10-17 | 1987-04-27 | Hitachi Cable Ltd | Diagnostic method for insulating deterioration of electric equipment |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5276401A (en) * | 1990-01-09 | 1994-01-04 | Hitachi Cable, Ltd. | Method for diagnosing an insulation deterioration of an electric apparatus |
JPH05142290A (en) * | 1991-11-15 | 1993-06-08 | Tokyo Electric Power Co Inc:The | Diagnosing method of insulation of cv cable |
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