JPS5590863A - Device for measuring grounding resistance - Google Patents

Device for measuring grounding resistance

Info

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
Application number
JP16475678A
Other languages
Japanese (ja)
Other versions
JPS6039184B2 (en
Inventor
Nobuo Nakajima
Eiji Hayashi
Noboru Unosawa
Kazumi Takeda
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.)
Yokogawa Electric Corp
Tokyo Electric Power Company Holdings Inc
Original Assignee
Tokyo Electric Power Co Inc
Yokogawa Hokushin Electric Corp
Yokogawa Electric Works 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 Tokyo Electric Power Co Inc, Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Tokyo Electric Power Co Inc
Priority to JP16475678A priority Critical patent/JPS6039184B2/en
Publication of JPS5590863A publication Critical patent/JPS5590863A/en
Publication of JPS6039184B2 publication Critical patent/JPS6039184B2/en
Expired legal-status Critical Current

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
JP16475678A 1978-12-28 1978-12-28 Earth resistance measuring device Expired JPS6039184B2 (en)

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)

Also Published As

Publication number Publication date
JPS6039184B2 (en) 1985-09-04

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