JPS5590863A - Device for measuring grounding resistance - Google Patents
Device for measuring grounding resistanceInfo
- Publication number
- JPS5590863A JPS5590863A JP16475678A JP16475678A JPS5590863A JP S5590863 A JPS5590863 A JP S5590863A JP 16475678 A JP16475678 A JP 16475678A JP 16475678 A JP16475678 A JP 16475678A JP S5590863 A JPS5590863 A JP S5590863A
- Authority
- JP
- Japan
- Prior art keywords
- level comparator
- indicator
- transformer
- voltage
- grounding resistance
- 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)
Abstract
PURPOSE: To improve the reliability of the device for measuring the grounding resistance by causing a level comparator to operate by the induction voltage of a feedback coil when the engagement of a transformer for injection becomes deteriorated thereby to actuate an indicator.
CONSTITUTION: After the induction voltage e2 of a feedback coil NF provided in a transformer CT1 for injection has been rectified in a rectifying and amplifying circuit RE2, it is added to an indicator DS through a level comparator LV. Accordingly, if the threshold voltage of the level comparator LV is set, for example, at a value in the vicinity of the limit value of the control of a feedback loop, when the engagement of the transformer CT1 is deteriorated and the size of the air gap exceeds the limit value of the control of the feedback loop and the voltage e2 exceeds the threshold value of the level comparator LV, the level comparator LV operates, whereby the indicator DS operates. The output of the indicator DS becomes an alarm signal.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16475678A JPS6039184B2 (en) | 1978-12-28 | 1978-12-28 | Earth resistance measuring device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16475678A JPS6039184B2 (en) | 1978-12-28 | 1978-12-28 | Earth resistance measuring device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5590863A true JPS5590863A (en) | 1980-07-09 |
JPS6039184B2 JPS6039184B2 (en) | 1985-09-04 |
Family
ID=15799317
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16475678A Expired JPS6039184B2 (en) | 1978-12-28 | 1978-12-28 | Earth resistance measuring device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6039184B2 (en) |
-
1978
- 1978-12-28 JP JP16475678A patent/JPS6039184B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6039184B2 (en) | 1985-09-04 |
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