JPS568561A - Method and device for insulation resistance - Google Patents
Method and device for insulation resistanceInfo
- 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
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
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)
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 |
-
1979
- 1979-07-03 JP JP8416679A patent/JPS568561A/en active Pending
Cited By (1)
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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