JPS56160665A - Corona detecting device for electric equipment - Google Patents
Corona detecting device for electric equipmentInfo
- Publication number
- JPS56160665A JPS56160665A JP6392280A JP6392280A JPS56160665A JP S56160665 A JPS56160665 A JP S56160665A JP 6392280 A JP6392280 A JP 6392280A JP 6392280 A JP6392280 A JP 6392280A JP S56160665 A JPS56160665 A JP S56160665A
- Authority
- JP
- Japan
- Prior art keywords
- noises
- corona
- circuit
- synchronized
- pulse voltage
- 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
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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
Abstract
PURPOSE:To select and detect the noises caused by corona by generating the output pulses only when the pulses, which have reached a specified number of counts within a sampling period, are detected out of the synchronized noises. CONSTITUTION:When the noises generated in the electric equipment 1 are detected by a detecting element 3, the corona noises are passed through a high pass filter 5. However, completely random noises and the syncrhonized noises are not blocked. The corona noises are converted into a corona pulse voltage by a comparator 6, and inputted into an NAND circuit 7. A gate circuit 13 feeds the gate signal to the NAND gate 7 for every 180 deg. of an AC waveform. As a result, the synchronized pulse voltage, which is the synchronized noises to be inputted together with the corona pulse voltage, is blocked to enter a counter circuit 8. If the frequency dividing ratio of the counter 8 is n=f.k/2, where k is 1-2, and the sampling period is one second, only the corona signal passes the circuit 7, and the pulses which judge the presence or absence of the discharge can be inputted to a signal processing device 9 at every second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6392280A JPS56160665A (en) | 1980-05-16 | 1980-05-16 | Corona detecting device for electric equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6392280A JPS56160665A (en) | 1980-05-16 | 1980-05-16 | Corona detecting device for electric equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56160665A true JPS56160665A (en) | 1981-12-10 |
Family
ID=13243309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6392280A Pending JPS56160665A (en) | 1980-05-16 | 1980-05-16 | Corona detecting device for electric equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56160665A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6219775A (en) * | 1985-07-19 | 1987-01-28 | Mitsubishi Electric Corp | Measuring device for partial electric discharge |
| JPH03101479U (en) * | 1990-01-31 | 1991-10-23 | ||
| JP2019090693A (en) * | 2017-11-15 | 2019-06-13 | 株式会社明電舎 | Partial discharge detector |
-
1980
- 1980-05-16 JP JP6392280A patent/JPS56160665A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6219775A (en) * | 1985-07-19 | 1987-01-28 | Mitsubishi Electric Corp | Measuring device for partial electric discharge |
| JPH03101479U (en) * | 1990-01-31 | 1991-10-23 | ||
| JP2019090693A (en) * | 2017-11-15 | 2019-06-13 | 株式会社明電舎 | Partial discharge detector |
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