JPS5670465A - Measuring device for insulation resistance - Google Patents

Measuring device for insulation resistance

Info

Publication number
JPS5670465A
JPS5670465A JP14800379A JP14800379A JPS5670465A JP S5670465 A JPS5670465 A JP S5670465A JP 14800379 A JP14800379 A JP 14800379A JP 14800379 A JP14800379 A JP 14800379A JP S5670465 A JPS5670465 A JP S5670465A
Authority
JP
Japan
Prior art keywords
component
leak current
adder add
insulation resistance
zero
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
JP14800379A
Other languages
Japanese (ja)
Other versions
JPS6042419B2 (en
Inventor
Tatsuji Matsuno
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.)
Toyo Communication Equipment Co Ltd
Original Assignee
Toyo Communication Equipment Co 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 Toyo Communication Equipment Co Ltd filed Critical Toyo Communication Equipment Co Ltd
Priority to JP54148003A priority Critical patent/JPS6042419B2/en
Publication of JPS5670465A publication Critical patent/JPS5670465A/en
Publication of JPS6042419B2 publication Critical patent/JPS6042419B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To enable highly precise measurement of an effective component by the insulation resistance in a leak current by a method wherein the leak current detected by a zero-phase current transformer is corrected automatically by a signal based on the voltage phase at 90 degrees and the component generated by a suspension capacity is removed.
CONSTITUTION: The leak current detected by the zero-phase current transformer ZIT is added to an adder ADD through a buffer amplifier BA. Meanwhile, to the adder ADD is also added the current corresponding to the line voltage phase at 90 degrees and reversed in polarity by a transformer TRO, a phaseshifter PS, an inverter INV, etc., and the output of the adder ADD is processed by multipliers MULT1, LPF and LPF1 and becomes a required DC component. When a variable attenuator VR is controlled for feedback so as for the component to be zero, the leak current component corresponding to the suspension capacity outputted by the adder ADD is corrected automatically, whereby the highly precise measurement of the effective component by the insulation resistance in the leak current can be performed.
COPYRIGHT: (C)1981,JPO&Japio
JP54148003A 1979-11-14 1979-11-14 Insulation resistance measuring device Expired JPS6042419B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54148003A JPS6042419B2 (en) 1979-11-14 1979-11-14 Insulation resistance measuring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54148003A JPS6042419B2 (en) 1979-11-14 1979-11-14 Insulation resistance measuring device

Publications (2)

Publication Number Publication Date
JPS5670465A true JPS5670465A (en) 1981-06-12
JPS6042419B2 JPS6042419B2 (en) 1985-09-21

Family

ID=15442930

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54148003A Expired JPS6042419B2 (en) 1979-11-14 1979-11-14 Insulation resistance measuring device

Country Status (1)

Country Link
JP (1) JPS6042419B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58127172A (en) * 1982-01-26 1983-07-28 Toyo Commun Equip Co Ltd Insulation resistance measuring apparatus for electric line with suppressed stray capacity
WO1988004055A1 (en) * 1981-07-01 1988-06-02 Tatsuji Matsuno Method and device for detecting insulation resistance
US4980645A (en) * 1988-02-22 1990-12-25 Hitachi Cable, Ltd. Method for diagnosing an insulation deterioration of a power cable

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01127631U (en) * 1988-02-10 1989-08-31

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988004055A1 (en) * 1981-07-01 1988-06-02 Tatsuji Matsuno Method and device for detecting insulation resistance
JPS58127172A (en) * 1982-01-26 1983-07-28 Toyo Commun Equip Co Ltd Insulation resistance measuring apparatus for electric line with suppressed stray capacity
US4980645A (en) * 1988-02-22 1990-12-25 Hitachi Cable, Ltd. Method for diagnosing an insulation deterioration of a power cable

Also Published As

Publication number Publication date
JPS6042419B2 (en) 1985-09-21

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