JPS56107171A - Partial discharge detector - Google Patents

Partial discharge detector

Info

Publication number
JPS56107171A
JPS56107171A JP882980A JP882980A JPS56107171A JP S56107171 A JPS56107171 A JP S56107171A JP 882980 A JP882980 A JP 882980A JP 882980 A JP882980 A JP 882980A JP S56107171 A JPS56107171 A JP S56107171A
Authority
JP
Japan
Prior art keywords
current
run
polarity
partial discharge
positive
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
Application number
JP882980A
Other languages
Japanese (ja)
Inventor
Hideki Takahashi
Kazuo Kobayashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP882980A priority Critical patent/JPS56107171A/en
Publication of JPS56107171A publication Critical patent/JPS56107171A/en
Pending legal-status Critical Current

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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

PURPOSE:To separate a pulse current attributed to a partial discharge from an electric noise and make possible measurement at positive and negative polarities by combining diodes which run positive-polarity current and negative-polarity current. CONSTITUTION:If a partial discharge occurred in the equivalent electrostatic capacity of a test sample, an electric current is, is' runs, causing a negative-polarity current i2 to run through a diode 8 and a positive-polarity current i1 through a diode 9. Then these currents flow into an output impedance Zp. In this case, the positive- and negative-polarity currents i3, i4 due to the current is' run through D15, 12 and 13, 14 respectively. In addition, the currents iN, iN' run according to polarity on account of an electric noise generated by an impedance Zp on the power supply side, but to not run through D8, 9. Consequently, in case a reduced oscillation waveform of the current is runs, the terminal voltage of Zp is equal to the waveform of the current is. The currents is', iN, iN' do not run through Zd, so that a pulse current attributed to a partial discharge is detected at Zd of a detector 16 and a noise voltage generated at Zp is not detected.
JP882980A 1980-01-30 1980-01-30 Partial discharge detector Pending JPS56107171A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP882980A JPS56107171A (en) 1980-01-30 1980-01-30 Partial discharge detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP882980A JPS56107171A (en) 1980-01-30 1980-01-30 Partial discharge detector

Publications (1)

Publication Number Publication Date
JPS56107171A true JPS56107171A (en) 1981-08-25

Family

ID=11703672

Family Applications (1)

Application Number Title Priority Date Filing Date
JP882980A Pending JPS56107171A (en) 1980-01-30 1980-01-30 Partial discharge detector

Country Status (1)

Country Link
JP (1) JPS56107171A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102967810A (en) * 2012-11-22 2013-03-13 四川电力科学研究院 Partial discharge detecting device for variable-frequency resonant oscillation wave cable
CN111999619A (en) * 2020-09-17 2020-11-27 武汉朗德电气有限公司 GIS partial discharge test method and system based on pulse current distribution measurement

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102967810A (en) * 2012-11-22 2013-03-13 四川电力科学研究院 Partial discharge detecting device for variable-frequency resonant oscillation wave cable
CN111999619A (en) * 2020-09-17 2020-11-27 武汉朗德电气有限公司 GIS partial discharge test method and system based on pulse current distribution measurement

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