JPS56150364A - Detector for leakage of electricity - Google Patents
Detector for leakage of electricityInfo
- Publication number
- JPS56150364A JPS56150364A JP5317780A JP5317780A JPS56150364A JP S56150364 A JPS56150364 A JP S56150364A JP 5317780 A JP5317780 A JP 5317780A JP 5317780 A JP5317780 A JP 5317780A JP S56150364 A JPS56150364 A JP S56150364A
- Authority
- JP
- Japan
- Prior art keywords
- fault point
- frequency
- ground fault
- meter
- detector
- 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
Links
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)
- Locating Faults (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE:To detect a ground fault point easily and accurately by flowing fractional harmonic current of n/m of a power source frequency to the ground fault point and detecting this fractional harmonic current with a detector having a search coil. CONSTITUTION:An amplifier circuit 8 which amplifies the signal outputted through a filter 7 allowing the passage of only the divided signal of 1/3 frequency of a power source frequency f0 from the receiving signal induced in a search coil 6 is built in a detector 5, and a meter 9 is driven by the output of the circuit 8. The divided frequency current of 1/3 frequency of the frequency f0 flows in the ground fault resistance R at a ground fault point P and therefore if the coil 6 of the device 5 is moved along low-voltage side distribution lines D1 and D2, the indication of the meter 9 increases sharply as it approaches to the fault point P, and decreases sharply as it leaves from the fault point P. Hence, the ground fault point on the lines D1, D2 is easily discovered from the increase or decrease in the indication of the meter 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5317780A JPS56150364A (en) | 1980-04-21 | 1980-04-21 | Detector for leakage of electricity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5317780A JPS56150364A (en) | 1980-04-21 | 1980-04-21 | Detector for leakage of electricity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56150364A true JPS56150364A (en) | 1981-11-20 |
| JPS6324265B2 JPS6324265B2 (en) | 1988-05-19 |
Family
ID=12935576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5317780A Granted JPS56150364A (en) | 1980-04-21 | 1980-04-21 | Detector for leakage of electricity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56150364A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4978854A (en) * | 1972-12-07 | 1974-07-30 | ||
| JPS51130839A (en) * | 1975-05-08 | 1976-11-13 | Kansai Denki Hoan Kyokai | Method for detecting trouble of electric insulation |
-
1980
- 1980-04-21 JP JP5317780A patent/JPS56150364A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4978854A (en) * | 1972-12-07 | 1974-07-30 | ||
| JPS51130839A (en) * | 1975-05-08 | 1976-11-13 | Kansai Denki Hoan Kyokai | Method for detecting trouble of electric insulation |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6324265B2 (en) | 1988-05-19 |
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