JPS5682458A - Insulation resistance measuring apparatus of neutral point ground system - Google Patents
Insulation resistance measuring apparatus of neutral point ground systemInfo
- Publication number
- JPS5682458A JPS5682458A JP15918079A JP15918079A JPS5682458A JP S5682458 A JPS5682458 A JP S5682458A JP 15918079 A JP15918079 A JP 15918079A JP 15918079 A JP15918079 A JP 15918079A JP S5682458 A JPS5682458 A JP S5682458A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- neutral point
- phase difference
- insulation resistance
- phase
- 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
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
PURPOSE: To eliminate the need for any auxilary power source and make possible the monitoring of the degradation in insulation in a hot-line state by detecting the zero phase voltage and neutral point current of an electric system, and measuring insulation resistance from the phase difference thereof.
CONSTITUTION: The neutral point of a 3-phase AC generator 1 is grounded via a ground resistance 2 and an instrument current transformer 3, while the secondary side of the current transformer 3 is connected to a phase difference detector 5 via a filter 4. On the other hand, the primary side of a ground type potential transformer 6 is connected to the 3-phase line of the system, and the secondary side of the transformer 6 is connected to the device 5 via a filter 7; further, a voltmeter 8 is connected thereto. Then, the phase difference of the respecrive components obtained by removing frequency components other than specific frequency from the outputs of the current transformer 3 and the transformer 6 respectively via the filters 4, 7 is measured with the device 6, and the insulation resistance is calculated based on this phase difference.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15918079A JPS5682458A (en) | 1979-12-10 | 1979-12-10 | Insulation resistance measuring apparatus of neutral point ground system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15918079A JPS5682458A (en) | 1979-12-10 | 1979-12-10 | Insulation resistance measuring apparatus of neutral point ground system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5682458A true JPS5682458A (en) | 1981-07-06 |
Family
ID=15688041
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15918079A Pending JPS5682458A (en) | 1979-12-10 | 1979-12-10 | Insulation resistance measuring apparatus of neutral point ground system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5682458A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01107175A (en) * | 1987-10-20 | 1989-04-25 | Showa Electric Wire & Cable Co Ltd | Apparatus for measuring tandelta of hot line |
JPH02208573A (en) * | 1989-02-09 | 1990-08-20 | Shikoku Sogo Kenkyusho:Kk | Method for measuring dielectric loss of cable |
JPH04132969A (en) * | 1990-09-26 | 1992-05-07 | Midori Denshi Kk | Apparatus for measuring leakage current |
KR100918515B1 (en) | 2009-01-12 | 2009-09-24 | 조승기 | Method for measuring earth resistance of a single ground in active state |
-
1979
- 1979-12-10 JP JP15918079A patent/JPS5682458A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01107175A (en) * | 1987-10-20 | 1989-04-25 | Showa Electric Wire & Cable Co Ltd | Apparatus for measuring tandelta of hot line |
JPH02208573A (en) * | 1989-02-09 | 1990-08-20 | Shikoku Sogo Kenkyusho:Kk | Method for measuring dielectric loss of cable |
JPH04132969A (en) * | 1990-09-26 | 1992-05-07 | Midori Denshi Kk | Apparatus for measuring leakage current |
KR100918515B1 (en) | 2009-01-12 | 2009-09-24 | 조승기 | Method for measuring earth resistance of a single ground in active state |
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