JPS646880A - Method for detecting fault section of power cable - Google Patents
Method for detecting fault section of power cableInfo
- Publication number
- JPS646880A JPS646880A JP16259987A JP16259987A JPS646880A JP S646880 A JPS646880 A JP S646880A JP 16259987 A JP16259987 A JP 16259987A JP 16259987 A JP16259987 A JP 16259987A JP S646880 A JPS646880 A JP S646880A
- Authority
- JP
- Japan
- Prior art keywords
- accident
- section
- current flows
- magnetic field
- 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.)
- Pending
Links
Landscapes
- Locating Faults (AREA)
Abstract
PURPOSE:To detect an accident section by a small number of magnetic field sensors by comparing the outputs of the plural magnetic sensors which are arranged along a cable line at intervals. CONSTITUTION:If a ground-fault accident occurs at an accident point 62, accident currents of the cable 12 and cable metallic sheath 145 in the line section A where the accident occurs are nearly equal in level, but flow in the opposite directions, so that almost no voltage is induced across an electromagnetic coil 52. In an adjacent section B, a conductor current flows in red phase and a sheath current flows in blue phase, so a voltage is induced across a magnetic field sensor 50 because of the unbalance between produced magnetic fields. Further, in a section C which is adjacent to the adjacent section, the accident current flows while being divided equally into respective phases of red, blue, and black because of the grounding line 42 of a normal conduct part 40, thereby inducing a large voltage across a magnetic field sensor 50. Therefore, voltages which are developed across electromagnetic coils 52 in the respective sections are in level relation C>B>A and the accident section can be decided from the large-small relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16259987A JPS646880A (en) | 1987-06-30 | 1987-06-30 | Method for detecting fault section of power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16259987A JPS646880A (en) | 1987-06-30 | 1987-06-30 | Method for detecting fault section of power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS646880A true JPS646880A (en) | 1989-01-11 |
Family
ID=15757655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16259987A Pending JPS646880A (en) | 1987-06-30 | 1987-06-30 | Method for detecting fault section of power cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS646880A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140055527A (en) * | 2012-10-31 | 2014-05-09 | 한국전력공사 | Apparatus and method for displaying the position of failure on a distribution line |
| CN112881863A (en) * | 2021-01-18 | 2021-06-01 | 长沙理工大学 | High-voltage cable fault on-line monitoring method based on novel criterion established by sheath current |
-
1987
- 1987-06-30 JP JP16259987A patent/JPS646880A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140055527A (en) * | 2012-10-31 | 2014-05-09 | 한국전력공사 | Apparatus and method for displaying the position of failure on a distribution line |
| CN112881863A (en) * | 2021-01-18 | 2021-06-01 | 长沙理工大学 | High-voltage cable fault on-line monitoring method based on novel criterion established by sheath current |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7944654B2 (en) | Multiple-pole circuit breaker with shared current sensor for arcing fault detection | |
| US6154036A (en) | Ground fault location system and ground fault detector therefor | |
| KR890004170A (en) | Insulation Detection Method and Device | |
| CN110632436A (en) | Grounding fault phase detection system and detection method for ITN power supply system | |
| DE3366747D1 (en) | Methods of investigating ground faults particularly on induction furnaces | |
| EP1183664A1 (en) | Ground fault location system and ground fault detector therefor | |
| JPS646880A (en) | Method for detecting fault section of power cable | |
| CA2021712A1 (en) | Optical current transformer | |
| CN212111734U (en) | Grounding fault phase detection system of ITN power supply system | |
| FI950399A (en) | Fault detection device in the above-ground electrical energy distribution network | |
| JPH073448B2 (en) | Ground fault detector for distribution system | |
| JPS54115174A (en) | Current detector | |
| EP1198717B1 (en) | Apparatus and method for fault detection on conductors | |
| JPS60173474A (en) | Measuring method of magnetic field around cable | |
| JPH06273470A (en) | Accident section plotting device of overhead transmission line | |
| JP2010223906A (en) | Method and device for detecting abnormality of shielding member | |
| JPH0862264A (en) | Insulation resistance measuring device for power cable | |
| GB2157005A (en) | Detecting rotor winding faults | |
| JPH0161007B2 (en) | ||
| JPH01274070A (en) | Optical zero-phase current transformer | |
| SU639045A2 (en) | Null sequence protection relay | |
| JPS57199966A (en) | Detecting method for failure in array of core in quad of quad cable | |
| SU970279A1 (en) | Method of checking insulation condition in compensated neutral networks | |
| JPS60178371A (en) | Earth detection of high voltage machinery | |
| SU991541A2 (en) | Magnetosensitive element for starting remote relay protection system |