JPH0155425B2 - - Google Patents
Info
- Publication number
- JPH0155425B2 JPH0155425B2 JP56214080A JP21408081A JPH0155425B2 JP H0155425 B2 JPH0155425 B2 JP H0155425B2 JP 56214080 A JP56214080 A JP 56214080A JP 21408081 A JP21408081 A JP 21408081A JP H0155425 B2 JPH0155425 B2 JP H0155425B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- fault
- line
- low
- failure
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 19
- 230000010355 oscillation Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 description 25
- 239000003990 capacitor Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56214080A JPS58109861A (ja) | 1981-12-24 | 1981-12-24 | 対ケ−ブル障害検出回路 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56214080A JPS58109861A (ja) | 1981-12-24 | 1981-12-24 | 対ケ−ブル障害検出回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58109861A JPS58109861A (ja) | 1983-06-30 |
JPH0155425B2 true JPH0155425B2 (enrdf_load_stackoverflow) | 1989-11-24 |
Family
ID=16649905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56214080A Granted JPS58109861A (ja) | 1981-12-24 | 1981-12-24 | 対ケ−ブル障害検出回路 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58109861A (enrdf_load_stackoverflow) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994000771A1 (en) * | 1992-06-24 | 1994-01-06 | Tutankhamon Electronics, Inc. | Network monitor and test apparatus |
JP5096871B2 (ja) * | 2007-10-29 | 2012-12-12 | 株式会社アイ・オー・データ機器 | ケーブル断線検出装置およびケーブル断線検出方法 |
JP5096884B2 (ja) * | 2007-11-19 | 2012-12-12 | 株式会社アイ・オー・データ機器 | ケーブル断線検出装置 |
-
1981
- 1981-12-24 JP JP56214080A patent/JPS58109861A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS58109861A (ja) | 1983-06-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4153923A (en) | Ground monitoring system and method | |
US4203006A (en) | Direct access coupler | |
US4941063A (en) | Telephone lines overvoltage protection apparatus | |
EP0997027B1 (en) | Telephone subscriber line diagnostics system and method | |
CN100414798C (zh) | 对地漏电保护器及包括该保护器的电气开关装置 | |
US4459437A (en) | Test system for locating breaks and short circuits in a two-lead line | |
US3891895A (en) | Ground fault detection | |
NO173076B (no) | Fremgangsmaate og innretning til lokalisering av jordslutning av en leder i et trefasenett | |
US6351533B1 (en) | System and method for protecting devices connected to a telephone line | |
US4143250A (en) | Telephone isolation system | |
US4415779A (en) | Methods of and apparatus for testing telephone subscriber loop to locate a fault relative to a reference point | |
JPS60500397A (ja) | 鉄共振変圧器を用いた電源用故障防止システム | |
US4373121A (en) | Maintenance termination device | |
JP6896158B2 (ja) | 漏電検出装置および漏電遮断器 | |
US4524446A (en) | Signal quality monitor for protective relay system | |
US4952880A (en) | Apparatus for testing and counting flaws in the insulation of an electrical conductor passing through an electrode | |
JPS5882170A (ja) | 2導体式回線の短絡および開放を検出する試験システム | |
US4550223A (en) | Test device, and method for locating faults in a two-lead line | |
JPH0155425B2 (enrdf_load_stackoverflow) | ||
EP0393333B1 (en) | Telephone lines overvoltage protection circuit | |
US4440985A (en) | Apparatus for determining the location of faults in a transmission line | |
US4080642A (en) | Power system safety monitor | |
US4398064A (en) | Call-for-service and continuity sensor circuit | |
US4020397A (en) | Parallel transistor protection circuit | |
US4754472A (en) | Telecommunication systems |