JPS5672353A - Insulation resistance measuring method for single phase three wire distribution line - Google Patents
Insulation resistance measuring method for single phase three wire distribution lineInfo
- Publication number
- JPS5672353A JPS5672353A JP14867379A JP14867379A JPS5672353A JP S5672353 A JPS5672353 A JP S5672353A JP 14867379 A JP14867379 A JP 14867379A JP 14867379 A JP14867379 A JP 14867379A JP S5672353 A JPS5672353 A JP S5672353A
- Authority
- JP
- Japan
- Prior art keywords
- output
- fed
- angular frequency
- multiplier mult
- nongrounded
- 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
- Measurement Of Resistance Or Impedance (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To enable to measure the insulating resistance at both the nongrounded lines with one set of insulating resistance measurement circuit in time sharing separately, by alternately applying a voltage to a pair of nongrounded electric line in different frequencies from the commerical frequency.
CONSTITUTION: When a switch circuit SW is turned on to the position (a), a leakage current ig1 at angular frequency ω1 is detected at a zero phase current transformer ZCT, the output is fed to the bandpass filter FIL in the center angular frequency ω1 and the leakage current in the angular frequency ω1 is obtained. The output of the bandpass filter FIL is fed to one input terminal of a multiplier MULT. The output of an oscillator OSC is fed to another input terminal of the multiplier MULT and the amount inversely proportional to the insulation resistor R1 is obtained at the DC component of the output OUT of multiplication. When the switch circuit SW is selected to the position (b), a voltage inversely proportional to the insulation resistor R2 is obtained at the output OUT of the multiplier MULT.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14867379A JPS5672353A (en) | 1979-11-16 | 1979-11-16 | Insulation resistance measuring method for single phase three wire distribution line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14867379A JPS5672353A (en) | 1979-11-16 | 1979-11-16 | Insulation resistance measuring method for single phase three wire distribution line |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5672353A true JPS5672353A (en) | 1981-06-16 |
JPH039424B2 JPH039424B2 (en) | 1991-02-08 |
Family
ID=15458050
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14867379A Granted JPS5672353A (en) | 1979-11-16 | 1979-11-16 | Insulation resistance measuring method for single phase three wire distribution line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5672353A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014025760A (en) * | 2012-07-25 | 2014-02-06 | Chugoku Electric Power Co Inc:The | Insulation diagnostic device, insulation diagnostic system, and program |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5396444A (en) * | 1977-02-02 | 1978-08-23 | Tokyo Electric Power Co Inc:The | Measuring device for ground resistance |
-
1979
- 1979-11-16 JP JP14867379A patent/JPS5672353A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5396444A (en) * | 1977-02-02 | 1978-08-23 | Tokyo Electric Power Co Inc:The | Measuring device for ground resistance |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014025760A (en) * | 2012-07-25 | 2014-02-06 | Chugoku Electric Power Co Inc:The | Insulation diagnostic device, insulation diagnostic system, and program |
Also Published As
Publication number | Publication date |
---|---|
JPH039424B2 (en) | 1991-02-08 |
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