JPS5596468A - Snapping detector - Google Patents
Snapping detectorInfo
- Publication number
- JPS5596468A JPS5596468A JP579179A JP579179A JPS5596468A JP S5596468 A JPS5596468 A JP S5596468A JP 579179 A JP579179 A JP 579179A JP 579179 A JP579179 A JP 579179A JP S5596468 A JPS5596468 A JP S5596468A
- Authority
- JP
- Japan
- Prior art keywords
- detected
- property
- snapping
- arc
- current
- 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
- Emergency Protection Circuit Devices (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE: To surely detect snapping, by using a low-cut filter to detect the current flowing through a distribution line and by extracting only the arc current component from the detected current.
CONSTITUTION: The currents flowing through distribution lines 1 are detected by current transformers 31W33 provided on the power-source-side ends of the distribution lines so that the detected currents are applied to the differentiators 51W53 of a snapping detector 4. The differentiators constitute low-cut filters to extract high-frequency pulsating arc current components B superposed on load currents of AC power frequency. Overcurrent detecting circuits 61W63, which have reverse- timing property, act in response to the arc current components B. Since the circuits 61W63 have a slower melting-off property than the slowest melting-off property of several kinds lf insulated wires used for a distribution system and have a faster arc disappearing property than the fastest disappearing property of the insulated wires, the circuits 61W63 can be completely cut off. The detected signal is produced in a time range before the disappearance of arc and caused to cooperate with a ground fault detecting signal obtained from a ground fault relay. As a result, snapping can be surely detected.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP579179A JPS5596468A (en) | 1979-01-18 | 1979-01-18 | Snapping detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP579179A JPS5596468A (en) | 1979-01-18 | 1979-01-18 | Snapping detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5596468A true JPS5596468A (en) | 1980-07-22 |
Family
ID=11620902
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP579179A Pending JPS5596468A (en) | 1979-01-18 | 1979-01-18 | Snapping detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5596468A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100393886B1 (en) * | 2000-08-22 | 2003-08-09 | 휴먼엘텍 주식회사 | Circuit breaker capable of electric trip and method of the same |
-
1979
- 1979-01-18 JP JP579179A patent/JPS5596468A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100393886B1 (en) * | 2000-08-22 | 2003-08-09 | 휴먼엘텍 주식회사 | Circuit breaker capable of electric trip and method of the same |
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