JPS54129383A - Supervisory unit for cable insulation - Google Patents
Supervisory unit for cable insulationInfo
- Publication number
- JPS54129383A JPS54129383A JP3620678A JP3620678A JPS54129383A JP S54129383 A JPS54129383 A JP S54129383A JP 3620678 A JP3620678 A JP 3620678A JP 3620678 A JP3620678 A JP 3620678A JP S54129383 A JPS54129383 A JP S54129383A
- Authority
- JP
- Japan
- Prior art keywords
- resistance
- scale
- voltage
- ground
- respect
- 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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
PURPOSE: To enable an operation of directly reading a worsened resistance of the cable insulation with an effective scale of resistance, by providing a DC constant voltage power unit for controlling a DC voltage, at the output end with respect to the ground, to a constant level, and providing an ammeter with a specific scale of resistance applied.
CONSTITUTION: At an output end 9 is provided a detecting point α, β for detection of DC voltage with respect to the ground, with the detected signal fed to a DC constant voltage power unit 1' via a wiring 11, and said voltage with respect to the ground is controlled to a constant level. And the scale of resistance is applied to an ammeter 2' in such manner that, a resistance value, obtained by dividing the DC voltage with respect to the ground with its maximum current scale, is graduated at a position of said maximum current scale point as the minimum scale, further with said minimum scale of resistance being the reference, and the reading of varying current converted into the resistance. Accordingly, with many ammeters used, which are graduated in the scale of resistance and of different sensitivity not porducing an overlapping of the resistance scale to each other, by selectively switching each of the ammeters, a direct reading can be operated by an effective scale of resistance throughout a wide range.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3620678A JPS54129383A (en) | 1978-03-29 | 1978-03-29 | Supervisory unit for cable insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3620678A JPS54129383A (en) | 1978-03-29 | 1978-03-29 | Supervisory unit for cable insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS54129383A true JPS54129383A (en) | 1979-10-06 |
Family
ID=12463259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3620678A Pending JPS54129383A (en) | 1978-03-29 | 1978-03-29 | Supervisory unit for cable insulation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54129383A (en) |
-
1978
- 1978-03-29 JP JP3620678A patent/JPS54129383A/en active Pending
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