JPS5570752A - Balancing type partial discharge test circuit - Google Patents

Balancing type partial discharge test circuit

Info

Publication number
JPS5570752A
JPS5570752A JP14340778A JP14340778A JPS5570752A JP S5570752 A JPS5570752 A JP S5570752A JP 14340778 A JP14340778 A JP 14340778A JP 14340778 A JP14340778 A JP 14340778A JP S5570752 A JPS5570752 A JP S5570752A
Authority
JP
Japan
Prior art keywords
partial discharge
pulse
test circuit
external noise
corona
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
Application number
JP14340778A
Other languages
Japanese (ja)
Other versions
JPS6013471B2 (en
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 JP14340778A priority Critical patent/JPS6013471B2/en
Publication of JPS5570752A publication Critical patent/JPS5570752A/en
Publication of JPS6013471B2 publication Critical patent/JPS6013471B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Testing Relating To Insulation (AREA)

Abstract

PURPOSE: To enable to measure only the partial discharge pulse for the object with the corona measuring unit singly, by erasing the external noise produced at the part other than the object in the partial discharge test circuit in balancing operation.
CONSTITUTION: As the means rejecting external noise, the variable impedance element 20 adjustable to the impedance equal to the high impedance element 16 and the balancing section 28 including the pulse transformers 23 and 24 are provided. Further, high frequency cable 26 and the corona detector 27 are connected to it. Thus, the voltage is reduced to external noise and the output voltage of the pulse transformer can not be measured with balancing operation. On the other hand, to the partial discharge pulse produced in the object 25, since most current flows to the branch not including the high impedance element 16, true corona pulse can be measured with good sensitivity.
COPYRIGHT: (C)1980,JPO&Japio
JP14340778A 1978-11-22 1978-11-22 Balanced partial discharge test circuit Expired JPS6013471B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14340778A JPS6013471B2 (en) 1978-11-22 1978-11-22 Balanced partial discharge test circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14340778A JPS6013471B2 (en) 1978-11-22 1978-11-22 Balanced partial discharge test circuit

Publications (2)

Publication Number Publication Date
JPS5570752A true JPS5570752A (en) 1980-05-28
JPS6013471B2 JPS6013471B2 (en) 1985-04-08

Family

ID=15338045

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14340778A Expired JPS6013471B2 (en) 1978-11-22 1978-11-22 Balanced partial discharge test circuit

Country Status (1)

Country Link
JP (1) JPS6013471B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100667512B1 (en) 2005-03-05 2007-01-10 엘에스전선 주식회사 Partial discharge detection device of junction box for underground power transmission cable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100667512B1 (en) 2005-03-05 2007-01-10 엘에스전선 주식회사 Partial discharge detection device of junction box for underground power transmission cable

Also Published As

Publication number Publication date
JPS6013471B2 (en) 1985-04-08

Similar Documents

Publication Publication Date Title
JPS55155258A (en) Device for measuring characteristic of gapless arrester
JPS5570752A (en) Balancing type partial discharge test circuit
JPS5524640A (en) Measurement of impedance and load loss of there-winding transformer
JPS5393072A (en) Earthing resistance measuring apparatus
JPS5244673A (en) Loss angle measuring instrument
JPS5576960A (en) Method of measuring low grounding resistance
JPS5368290A (en) Insulation resistance measuring apparatus of ground system
JPS5658666A (en) Avometer having impedance range
JPS5610265A (en) Method for measuring voltage-current characteristic of semiconductor element
JPS566170A (en) Iron loss measuring instrument
JPS5494221A (en) Output impedance measuring method of facsimile transceiver
JPS5567664A (en) Local discharge test circuit of balance type
JPS55128163A (en) Method for measurement of resistance of conductive cover
JPS55414A (en) Measurement of potential distribution of fluorescent lamp
JPS5433768A (en) Tester for insulated resistor
JPS54121763A (en) Radiation thickness gauge
JPS5630658A (en) Dielectric strength measuring apparatus
JPS5612558A (en) Insulation resistance meter
JPS5531913A (en) Moisture measuring circuit
JPS5488167A (en) Noise power measuring apparatus
JPS539583A (en) Method and apparatus for measuring aprtial discharge
JPS5631656A (en) S/n instrument and s/n measuring method
JPS5494222A (en) Input impefance measuring method for facsimile transceiver
JPS54156680A (en) Micro impedance measuring apparatus
JPS5649949A (en) Electric hygrometer