JPS6441871A - Insulation degrading detector for electric equipment and cable - Google Patents
Insulation degrading detector for electric equipment and cableInfo
- 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
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.
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 |
KR1019880009997A KR920000566B1 (en) | 1987-08-07 | 1988-08-05 | Method of and apparatus for assessing insucation conditions |
AT93102628T ATE180064T1 (en) | 1987-08-07 | 1988-08-05 | DEVICE FOR ASSESSING THE CONDITION OF INSULATION |
DE3888751T DE3888751T2 (en) | 1987-08-07 | 1988-08-05 | Procedure for determining the insulation condition. |
CA000573967A CA1294329C (en) | 1987-08-07 | 1988-08-05 | Method of and apparatus for assessing insulation conditions |
EP93102627A EP0544646B1 (en) | 1987-08-07 | 1988-08-05 | Apparatus for assessing insulation conditions |
EP93102628A EP0550403B1 (en) | 1987-08-07 | 1988-08-05 | Apparatus for assessing insulation conditions |
US07/228,578 US4929903A (en) | 1987-08-07 | 1988-08-05 | Method of and apparatus for assessing insulation conditions |
DE3856334T DE3856334T2 (en) | 1987-08-07 | 1988-08-05 | Device for evaluating the insulation condition |
EP88307260A EP0302747B1 (en) | 1987-08-07 | 1988-08-05 | Method for assessing insulation conditions |
DE3856263T DE3856263T2 (en) | 1987-08-07 | 1988-08-05 | Device for assessing the condition of insulation |
AT93102627T ATE172794T1 (en) | 1987-08-07 | 1988-08-05 | DEVICE FOR ASSESSING THE CONDITION OF INSULATION |
AT88307260T ATE103713T1 (en) | 1987-08-07 | 1988-08-05 | PROCEDURE FOR DETERMINING THE STATE 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 arrangement for testing state of insulation |
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)
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)
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 |
-
1987
- 1987-08-07 JP JP19781287A patent/JPH07119782B2/en not_active Expired - Lifetime
Cited By (3)
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 |
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