JPS562569A - Insulating resistance measuring instrument - Google Patents
Insulating resistance measuring instrumentInfo
- Publication number
- JPS562569A JPS562569A JP7754979A JP7754979A JPS562569A JP S562569 A JPS562569 A JP S562569A JP 7754979 A JP7754979 A JP 7754979A JP 7754979 A JP7754979 A JP 7754979A JP S562569 A JPS562569 A JP S562569A
- Authority
- JP
- Japan
- Prior art keywords
- measurement
- measured
- insulating resistance
- bus
- 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.)
- Pending
Links
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE: To measure insulating resistance including a ground fault with a hot line circuit by providing the function of inverting the polarity of an applied voltage for measurement and the arithmetic function of averaging the quantity of electricity equivalent to electric power and measured current.
CONSTITUTION: In the figure, Ec is a voltage across bus PN, (r) is the representative value of the insulating resistance of the circuit and (x) is the potential distance of connection point G of resistance (r) from bus N; and Rg is the measured-current limiting resistance, EM is an applied voltage for measurement, and IgA and IgB are measured currents with switches SA and SB ON. Then, when measurement terminals T1 and T2 are connected to the earth and bus N respectively, we obtain IgA=(EM-X.EC)/(r+Rg) and IgB=(EM+X.EC)/(r+Rg). From both the equations, we have (IgA+IgB)/2=EM/(r+Rg), where only (r) is a variable. Therefore, the measurement is taken twice while the polarity of the measurement applied voltage is inversed, so that even if the circuit to be measured has an earth DC voltage (hot line), the insulating resistance can be measured.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7754979A JPS562569A (en) | 1979-06-21 | 1979-06-21 | Insulating resistance measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7754979A JPS562569A (en) | 1979-06-21 | 1979-06-21 | Insulating resistance measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS562569A true JPS562569A (en) | 1981-01-12 |
Family
ID=13637087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7754979A Pending JPS562569A (en) | 1979-06-21 | 1979-06-21 | Insulating resistance measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS562569A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826522A (en) * | 1981-08-07 | 1983-02-17 | 三菱電機株式会社 | Ground detector for ac generator |
| JPS5826524A (en) * | 1981-08-07 | 1983-02-17 | 三菱電機株式会社 | Ground detector for ac generator |
| JPS6390172U (en) * | 1986-12-01 | 1988-06-11 | ||
| JP2013033827A (en) * | 2011-08-01 | 2013-02-14 | Jx Nippon Oil & Energy Corp | Ground fault detection device, ground fault detection method, photovoltaic power generation system, and ground fault detection program |
| EP2466320A3 (en) * | 2010-12-17 | 2016-05-04 | Zigor Corporación, S.A. | Measuring the electrical insulation resistance of a DC voltage source |
| US10333291B2 (en) | 2017-09-25 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Multiple generator ground fault detection |
| US10797632B2 (en) | 2018-08-21 | 2020-10-06 | Schweitzer Engineering Laboratories, Inc. | Sensitive directional element for generator protection |
| US10819261B1 (en) | 2019-10-25 | 2020-10-27 | Schweitzer Engineering Laboratories, Inc. | Security improvements for electric power generator protection |
| US10931097B2 (en) | 2017-09-25 | 2021-02-23 | Schweitzer Engineering Laboratories, Inc. | Generator stator ground protection using third harmonic |
| US11316455B2 (en) | 2019-08-28 | 2022-04-26 | Schweitzer Engineering Laboratories, Inc. | Generator rotor turn-to-turn fault detection using fractional harmonics |
| US11946966B1 (en) | 2023-02-20 | 2024-04-02 | Schweitzer Engineering Laboratories, Inc. | Selective stator ground fault protection using positive-sequence voltage reference |
-
1979
- 1979-06-21 JP JP7754979A patent/JPS562569A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5826522A (en) * | 1981-08-07 | 1983-02-17 | 三菱電機株式会社 | Ground detector for ac generator |
| JPS5826524A (en) * | 1981-08-07 | 1983-02-17 | 三菱電機株式会社 | Ground detector for ac generator |
| JPH0440670B2 (en) * | 1981-08-07 | 1992-07-03 | Mitsubishi Electric Corp | |
| JPS6390172U (en) * | 1986-12-01 | 1988-06-11 | ||
| EP2466320A3 (en) * | 2010-12-17 | 2016-05-04 | Zigor Corporación, S.A. | Measuring the electrical insulation resistance of a DC voltage source |
| JP2013033827A (en) * | 2011-08-01 | 2013-02-14 | Jx Nippon Oil & Energy Corp | Ground fault detection device, ground fault detection method, photovoltaic power generation system, and ground fault detection program |
| US10333291B2 (en) | 2017-09-25 | 2019-06-25 | Schweitzer Engineering Laboratories, Inc. | Multiple generator ground fault detection |
| US10931097B2 (en) | 2017-09-25 | 2021-02-23 | Schweitzer Engineering Laboratories, Inc. | Generator stator ground protection using third harmonic |
| US10797632B2 (en) | 2018-08-21 | 2020-10-06 | Schweitzer Engineering Laboratories, Inc. | Sensitive directional element for generator protection |
| US11316455B2 (en) | 2019-08-28 | 2022-04-26 | Schweitzer Engineering Laboratories, Inc. | Generator rotor turn-to-turn fault detection using fractional harmonics |
| US10819261B1 (en) | 2019-10-25 | 2020-10-27 | Schweitzer Engineering Laboratories, Inc. | Security improvements for electric power generator protection |
| US11946966B1 (en) | 2023-02-20 | 2024-04-02 | Schweitzer Engineering Laboratories, Inc. | Selective stator ground fault protection using positive-sequence voltage reference |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| IE780972L (en) | Electronic device for producing an output signal related to¹electrical power | |
| JPS562569A (en) | Insulating resistance measuring instrument | |
| JPS55155258A (en) | Device for measuring characteristic of gapless arrester | |
| SE7710752L (en) | PROCEDURE AND DEVICE FOR MONITORING AN ELECTRICAL CABLE REGARDING SHORT CIRCUITS | |
| JPS564066A (en) | Water-tree detection method of rubber/plastic insulated power cable | |
| JPS55106365A (en) | Megger | |
| JPS5657964A (en) | Insulation tester | |
| JPH0313742Y2 (en) | ||
| JPS53116194A (en) | Oil deterioration assessment device | |
| JPS5558469A (en) | Leakage current detector of arrester | |
| JPS5393072A (en) | Earthing resistance measuring apparatus | |
| JPS5482691A (en) | Measurement of fault points in cable | |
| JPS55116276A (en) | Insulation resistance measuring device for power transmission line | |
| GB2006969A (en) | Measuring the electrical resistivity of ground | |
| SU67079A1 (en) | Method for determining insulation impedance relative to earth of three-phase cable networks with insulated neutral | |
| SU853570A1 (en) | Device for locating grounding in networks with isolated neutral | |
| JPS55141677A (en) | Fault point detecting method of cable | |
| SU148455A1 (en) | The method of determining the voltage of contact in electric networks with a tightly grounded neutral | |
| SU1239635A1 (en) | Method of measuring active parameters of insulation of isolated neutral systems | |
| JPS57182658A (en) | Three-phase power measuring device | |
| JPS57189074A (en) | Corona measuring method for power cable | |
| JPS5559320A (en) | Sensor line type temperature sensor incorporating fault position detecting function | |
| JPS5824217Y2 (en) | Measuring instrument | |
| JPS5615103A (en) | Trolley line height difference detector at transition | |
| JPS5656425A (en) | Detection of powder transportation state |