[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS6441871A - Insulation degrading detector for electric equipment and cable - Google Patents

Insulation degrading detector for electric equipment and cable

Info

Publication number
JPS6441871A
JPS6441871A JP62197812A JP19781287A JPS6441871A JP S6441871 A JPS6441871 A JP S6441871A JP 62197812 A JP62197812 A JP 62197812A JP 19781287 A JP19781287 A JP 19781287A JP S6441871 A JPS6441871 A JP S6441871A
Authority
JP
Japan
Prior art keywords
current
coil
primary winding
main circuit
degrading
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
JP62197812A
Other languages
Japanese (ja)
Other versions
JPH07119782B2 (en
Inventor
Akira Saigo
Shigenari Maezawa
Junji Suehiro
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.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries 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 Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP19781287A priority Critical patent/JPH07119782B2/en
Priority to CA000573967A priority patent/CA1294329C/en
Priority to DE3856263T priority patent/DE3856263T2/en
Priority to AT88307260T priority patent/ATE103713T1/en
Priority to KR1019880009997A priority patent/KR920000566B1/en
Priority to DE3856334T priority patent/DE3856334T2/en
Priority to EP93102627A priority patent/EP0544646B1/en
Priority to DE3888751T priority patent/DE3888751T2/en
Priority to EP93102628A priority patent/EP0550403B1/en
Priority to AT93102628T priority patent/ATE180064T1/en
Priority to US07/228,578 priority patent/US4929903A/en
Priority to EP88307260A priority patent/EP0302747B1/en
Priority to AT93102627T priority patent/ATE172794T1/en
Priority to CN88104898A priority patent/CN1018201B/en
Publication of JPS6441871A publication Critical patent/JPS6441871A/en
Priority to CN 92104267 priority patent/CN1029033C/en
Publication of JPH07119782B2 publication Critical patent/JPH07119782B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Testing Relating To Insulation (AREA)

Abstract

PURPOSE:To detect the degree of degrading of an insulating material with a high sensitivity, by using two coils to run a current as obtained by vectorial subtraction of current flowing through an impedance from a total current of a main circuit to a primary winding of one coil. CONSTITUTION:When current flows through a main circuit 4, a total current of the main circuit runs to a primary winding 11 of a coil 1, while current resulting from vectorial subtraction of current flowing through an impedance 3 from the total current of the main circuit runs to a primary winding 12 of the coil 1. The current flows in series through the primary winding 12 of a coil 2. Then, a magnetomotive force of a cure 1A gives a vector difference between a magnetomotive force attributed to current of the primary winding 11 and that attributed to current of the primary winding 12. Then, a degrading signal element of an insulating material comprising a signal in a high frequency or a pulse overlapped with the current of the main circuit is obtained as voltage signal discriminated from a secondary winding 13 of the coil 1 or the secondary winding 22 of the coil 2. A core forming the coils 1 and 2 should be made of an amorphous alloy mainly composed of cobalt.
JP19781287A 1987-08-07 1987-08-07 Insulation deterioration detector for electrical equipment and cables Expired - Lifetime JPH07119782B2 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
JP19781287A JPH07119782B2 (en) 1987-08-07 1987-08-07 Insulation deterioration detector for electrical equipment and cables
AT93102628T ATE180064T1 (en) 1987-08-07 1988-08-05 DEVICE FOR ASSESSING THE CONDITION OF INSULATION
US07/228,578 US4929903A (en) 1987-08-07 1988-08-05 Method of and apparatus for assessing insulation conditions
AT88307260T ATE103713T1 (en) 1987-08-07 1988-08-05 PROCEDURE FOR DETERMINING THE STATE OF INSULATION.
KR1019880009997A KR920000566B1 (en) 1987-08-07 1988-08-05 Method of and apparatus for assessing insucation conditions
DE3856334T DE3856334T2 (en) 1987-08-07 1988-08-05 Device for evaluating the insulation condition
EP93102627A EP0544646B1 (en) 1987-08-07 1988-08-05 Apparatus for assessing insulation conditions
DE3888751T DE3888751T2 (en) 1987-08-07 1988-08-05 Procedure for determining the insulation condition.
EP93102628A EP0550403B1 (en) 1987-08-07 1988-08-05 Apparatus for assessing insulation conditions
CA000573967A CA1294329C (en) 1987-08-07 1988-08-05 Method of and apparatus for assessing insulation conditions
DE3856263T DE3856263T2 (en) 1987-08-07 1988-08-05 Device for assessing the condition of insulation
EP88307260A EP0302747B1 (en) 1987-08-07 1988-08-05 Method for assessing insulation conditions
AT93102627T ATE172794T1 (en) 1987-08-07 1988-08-05 DEVICE FOR ASSESSING THE CONDITION OF INSULATION
CN88104898A CN1018201B (en) 1987-08-07 1988-08-06 Method and apparatus for detecting insulation conditions
CN 92104267 CN1029033C (en) 1987-08-07 1992-06-03 Method and device for detecting insulation state

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19781287A JPH07119782B2 (en) 1987-08-07 1987-08-07 Insulation deterioration detector for electrical equipment and cables

Publications (2)

Publication Number Publication Date
JPS6441871A true JPS6441871A (en) 1989-02-14
JPH07119782B2 JPH07119782B2 (en) 1995-12-20

Family

ID=16380755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19781287A Expired - Lifetime JPH07119782B2 (en) 1987-08-07 1987-08-07 Insulation deterioration detector for electrical equipment and cables

Country Status (1)

Country Link
JP (1) JPH07119782B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020153900A (en) * 2019-03-22 2020-09-24 東京電力ホールディングス株式会社 Partial discharge diagnostic device
CN117970042A (en) * 2024-04-02 2024-05-03 天津滨电电力工程有限公司 Power cable joint detection device and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6632335B2 (en) * 1999-12-24 2003-10-14 Ebara Corporation Plating apparatus
KR102541394B1 (en) * 2020-12-30 2023-06-13 (유)중앙강재 Solar power generation device with a function to monitor the risk of solar line insulation status and leakage current per string based on the failure prediction multi-faceted evaluation table

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020153900A (en) * 2019-03-22 2020-09-24 東京電力ホールディングス株式会社 Partial discharge diagnostic device
CN117970042A (en) * 2024-04-02 2024-05-03 天津滨电电力工程有限公司 Power cable joint detection device and method
CN117970042B (en) * 2024-04-02 2024-06-11 天津滨电电力工程有限公司 Power cable joint detection device and method

Also Published As

Publication number Publication date
JPH07119782B2 (en) 1995-12-20

Similar Documents

Publication Publication Date Title
CA2203833C (en) A device for sensing of electric discharges in a test object
EP0544646A3 (en) Apparatus for assessing insulation conditions
GB1231108A (en)
JPS6441871A (en) Insulation degrading detector for electric equipment and cable
KR900700309A (en) Necessary elements for excitation and listening to the wheel module in the wheel monitoring system
DE69730167D1 (en) A DEVICE FOR MONITORING PARTIAL DISCHARGES IN A DEVICE WITH HIGH ELECTRIC VOLTAGE OR IN A HIGH VOLTAGE SYSTEM
JPS6441872A (en) Preventor of disaster caused by electric spark
CA2021712A1 (en) Optical current transformer
JPS5568604A (en) Electric energy supply device with through type current transformer
FR2444359A1 (en) Power equipment circuit for electrocution protection - overcomes sensitivity problems by measuring imbalance between abnormal earth leakage currents, power input and power output currents
CN210039905U (en) Current transformer for intelligent switch
ES488870A1 (en) Method of watching conducting currents with respect to a fault current and arrangement for carrying out this method.
GB1513038A (en) Electrical transformers of the kind employing a magnetic core
GB2370363A (en) Measuring DC component of AC current
JPS55147358A (en) Method and device for detecting breaking of wire line
FR2321208A1 (en) Detection of leakage current to earth - uses differential current transformer whose core is saturated by leakage current
BG34868A1 (en) Device for measuring electrical current
JPS57149972A (en) Testing equipment for underwater dielectric strength of electric wire or the like
SU625257A1 (en) Loading transformer
JPS5793264A (en) Detector for high-frequency current
JPS5750664A (en) Detector for disconnected part of wire
JPS5495196A (en) Protective circuit of superconductive coil
GB143160A (en) Means for measuring alternating electric currents
Tooru et al. Analysis of Characteristics of Transformers Using Complex Permeability
JPS56160026A (en) Method of flowing electric current