JPS5562369A - Detecting method for ground-fault section of power cable - Google Patents
Detecting method for ground-fault section of power cableInfo
- Publication number
- JPS5562369A JPS5562369A JP13550578A JP13550578A JPS5562369A JP S5562369 A JPS5562369 A JP S5562369A JP 13550578 A JP13550578 A JP 13550578A JP 13550578 A JP13550578 A JP 13550578A JP S5562369 A JPS5562369 A JP S5562369A
- Authority
- JP
- Japan
- Prior art keywords
- substation
- circuit
- metal sheath
- short
- ground
- 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 ensure an accurate detection for the ground-fault section in a short time by dividing the metal sheath of the cable into several sections with distribution of the relay unit each.
CONSTITUTION: Metal sheath 3 of the power cable is divided into serveral sections via insulated conection box 4, and the relay unit the primary part of which is formed with SCR7 is provided at the division position each. And then the cross bond wires of the three-phase metal sheath circuit are put into saturable transformer 6 en bloc, and the output voltage is saturated when the three-phase current sum exceeds the specific level. And the sum of this output voltage and the bias voltage within the substation is supplied to the gate circuit of SCR7. In case the short- circuit trouble takes place at position F, the short-circuit current flows only between substation 1 and position F, and the SCR's between 1 and F are all ignited. Therefore, the distance from the trouble point to the position of the SCR at substation 1 can be measured by measuring the resistance between auxiliary lines b and c at substation 2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13550578A JPS5562369A (en) | 1978-11-02 | 1978-11-02 | Detecting method for ground-fault section of power cable |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13550578A JPS5562369A (en) | 1978-11-02 | 1978-11-02 | Detecting method for ground-fault section of power cable |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5562369A true JPS5562369A (en) | 1980-05-10 |
Family
ID=15153320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13550578A Pending JPS5562369A (en) | 1978-11-02 | 1978-11-02 | Detecting method for ground-fault section of power cable |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5562369A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998008104A1 (en) * | 1996-08-22 | 1998-02-26 | Radiodetection Limited | Cable fault monitoring system |
-
1978
- 1978-11-02 JP JP13550578A patent/JPS5562369A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998008104A1 (en) * | 1996-08-22 | 1998-02-26 | Radiodetection Limited | Cable fault monitoring system |
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