JPS568561A - Method and device for insulation resistance - Google Patents

Method and device for insulation resistance

Info

Publication number
JPS568561A
JPS568561A JP8416679A JP8416679A JPS568561A JP S568561 A JPS568561 A JP S568561A JP 8416679 A JP8416679 A JP 8416679A JP 8416679 A JP8416679 A JP 8416679A JP S568561 A JPS568561 A JP S568561A
Authority
JP
Japan
Prior art keywords
hot
output
line state
resistance
current
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
Application number
JP8416679A
Other languages
Japanese (ja)
Inventor
Shotaro Shindo
Yoshio Oguma
Eiji Hayashi
Noboru Unosawa
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
Original Assignee
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 Yokogawa Hokushin Electric Corp, Yokogawa Electric Works Ltd filed Critical Yokogawa Hokushin Electric Corp
Priority to JP8416679A priority Critical patent/JPS568561A/en
Publication of JPS568561A publication Critical patent/JPS568561A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To secure the measurement of an insulation resistance under the hot-line state, by extracting the leak current of the resistance component via each clip-type injecting transformer and detecting transformer each.
CONSTITUTION: Power lines l1 and l2 under the hot-line state are inserted into the core from core division ends 14 and 24 of transformers CT1 and CT2 each and then clipped. After this, the output of oscillator OSC is supplied to coil 13 of CT1, and voltage (e) of frequency (f) is applied to lines l1 and l2 each. The injection current is caused by the applied voltage flows to electric paths AWE, and is then detected by detecting transformer CT2 to be sent to band pass amplifier BPA. In case leak current ir+ic exists between load LO and the ground, the BPA amplifies only current is of frequency (f) to supply it to cycle rectifying circuit SR. This output of SR corresponds to leak current ir of the pure resistance component, and measured insulated resistance Rx in obtained in the form of the reciprocal number of the SR output. In such constitution, the insulated resistance can be measured under the hot-line state.
COPYRIGHT: (C)1981,JPO&Japio
JP8416679A 1979-07-03 1979-07-03 Method and device for insulation resistance Pending JPS568561A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8416679A JPS568561A (en) 1979-07-03 1979-07-03 Method and device for insulation resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8416679A JPS568561A (en) 1979-07-03 1979-07-03 Method and device for insulation resistance

Publications (1)

Publication Number Publication Date
JPS568561A true JPS568561A (en) 1981-01-28

Family

ID=13822900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8416679A Pending JPS568561A (en) 1979-07-03 1979-07-03 Method and device for insulation resistance

Country Status (1)

Country Link
JP (1) JPS568561A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62144082A (en) * 1985-12-18 1987-06-27 Ngk Insulators Ltd Method and apparatus for testing heat stability of bushing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62144082A (en) * 1985-12-18 1987-06-27 Ngk Insulators Ltd Method and apparatus for testing heat stability of bushing

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