JPS5562369A - Detecting method for ground-fault section of power cable - Google Patents

Detecting method for ground-fault section of power cable

Info

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
Application number
JP13550578A
Other languages
Japanese (ja)
Inventor
Koichi Sugiyama
Yorio Ando
Junichi Minafuji
Masakata Fukazawa
Kimiharu Kanamaru
Shunei Kashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP13550578A priority Critical patent/JPS5562369A/en
Publication of JPS5562369A publication Critical patent/JPS5562369A/en
Pending legal-status Critical Current

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
JP13550578A 1978-11-02 1978-11-02 Detecting method for ground-fault section of power cable Pending JPS5562369A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998008104A1 (en) * 1996-08-22 1998-02-26 Radiodetection Limited Cable fault monitoring system

Cited By (1)

* Cited by examiner, † Cited by third party
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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