JPS56662A - Detection of accident point of cable - Google Patents

Detection of accident point of cable

Info

Publication number
JPS56662A
JPS56662A JP6744679A JP6744679A JPS56662A JP S56662 A JPS56662 A JP S56662A JP 6744679 A JP6744679 A JP 6744679A JP 6744679 A JP6744679 A JP 6744679A JP S56662 A JPS56662 A JP S56662A
Authority
JP
Japan
Prior art keywords
accident
measuring
accident point
cable conductor
phase cable
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
Application number
JP6744679A
Other languages
Japanese (ja)
Other versions
JPS6262298B2 (en
Inventor
Satoshi Ishikawa
Narutoshi Watanabe
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.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co 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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP6744679A priority Critical patent/JPS56662A/en
Publication of JPS56662A publication Critical patent/JPS56662A/en
Publication of JPS6262298B2 publication Critical patent/JPS6262298B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Locating Faults (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE: To simplify measurement of an accident point, by changing the polarity of a DC power source to positive and negative and by measuring potential difference between an accident phase cable conductor and the earth and between measuring ends of both cable conductors respectively.
CONSTITUTION: An accident point is detected by combination of indefectible phase cable conductor 1 and accident phase cable conductor 2. Cable conductors 1 and 2 are short-circuited between end parts 1b and 2b in the side opposite to measuring ends by short conductor 4, and DC power source E0 is connected between measuring ends 1a and 2a. Voltmeter Vo is connected between measuring ends 1a and 2a, and voltmeter VX is connected between measuring end 2a of accident phase cable conductor 2 and earth 15. If the overall length of each of cable conductors 1 and 2, the resistance, the distance from measuring end 2a of accident phase cable conductor 2 to accident point 3, and the resistance are denoted as L, RL, X, and RX respectively and the polarity of DC power source Eo is changed to positive and negative, expression I is true. Consequently, distance X to accident point 3 can be obtained in percentage without bridge balance, so that measurement can be simplified.
COPYRIGHT: (C)1981,JPO&Japio
JP6744679A 1979-06-01 1979-06-01 Detection of accident point of cable Granted JPS56662A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6744679A JPS56662A (en) 1979-06-01 1979-06-01 Detection of accident point of cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6744679A JPS56662A (en) 1979-06-01 1979-06-01 Detection of accident point of cable

Publications (2)

Publication Number Publication Date
JPS56662A true JPS56662A (en) 1981-01-07
JPS6262298B2 JPS6262298B2 (en) 1987-12-25

Family

ID=13345153

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6744679A Granted JPS56662A (en) 1979-06-01 1979-06-01 Detection of accident point of cable

Country Status (1)

Country Link
JP (1) JPS56662A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4900985A (en) * 1986-11-29 1990-02-13 Kabushiki Kaisha Toshiba High-voltage input terminal structure of a magnetron for a microwave oven

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4900985A (en) * 1986-11-29 1990-02-13 Kabushiki Kaisha Toshiba High-voltage input terminal structure of a magnetron for a microwave oven

Also Published As

Publication number Publication date
JPS6262298B2 (en) 1987-12-25

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