CN1948975A - Apparatus and method for testing absolute resistance to ground of electrolytic tank series - Google Patents
Apparatus and method for testing absolute resistance to ground of electrolytic tank series Download PDFInfo
- Publication number
- CN1948975A CN1948975A CN200610134268.XA CN200610134268A CN1948975A CN 1948975 A CN1948975 A CN 1948975A CN 200610134268 A CN200610134268 A CN 200610134268A CN 1948975 A CN1948975 A CN 1948975A
- Authority
- CN
- China
- Prior art keywords
- insulation against
- against ground
- cell line
- resistance
- detecting device
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000009413 insulation Methods 0.000 claims abstract description 54
- 230000007935 neutral effect Effects 0.000 claims abstract description 12
- 230000015556 catabolic process Effects 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 7
- 238000007689 inspection Methods 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 description 4
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/16—Electric current supply devices, e.g. bus bars
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses electrolytic aluminum factory pot line ground insulation resistance detecting device and method. It includes the following structure that it sets the isolating transformer of which secondary side one end is connected with divider resistance, limiting circuit inductance coil, the first capacitance, and connecting cable; another end is connected with rectification bridge a end of which b and c ends is parallel connecting with rheostat and capacitance; d end is connected with connecting cable; electric pressure signal converter; neutral grounding circuit which is set between the electrolytic bath midpoint and the ground. The invention can real time detect whether the pot line ground insulation is damaged or not, which one occurs insulation destruction in order to notice repair personnel timely to eliminate the breakdown and ensure operating personnel and device safety.
Description
Affiliated technical field
The present invention relates to a kind of insulation against ground resistor detecting device and method of electrolytic aluminium factory cell line, is that a kind of cell line that guarantees normally moves the safety practice of employing.
Background technology
Because the characteristics that the direct current series electrolytic tank is installed, make its insulation against ground be difficult for being in high level, running down of insulation situation in service in addition, and cause its insulation breakdown over the ground, and producing a large amount of direct current leakage currents, this exists very big danger to operating personnel, if untimely discovery is also removed the fault that has taken place, when another cell insulation goes to pot again in the series, certainly will cause this two places short circuit in the series, electrical equipment also will be endangered.The underground hardware of the meeting heavy corrosion of aluminium cell electric leakage simultaneously, metallic conduit and cable armouring protective seam etc.Aluminium cell leaks aluminium electrolyte in addition, also is a kind of serious electric leakage.If untimely detection, discovery then can make electrolytic tank scrap.
Summary of the invention
The present invention is for a kind of insulation against ground of cell line resistor detecting device and the method for providing is provided, purpose is to detect the insulation against ground resistance value of cell line in real time, and judge according to the size of insulation against ground resistance whether the insulation against ground of electrolytic tank is destroyed, and insulation breakdown has taken place in which platform electrolytic tank in the cell line, so that notify the maintainer in time to remove fault, guaranteed the safety of operating personnel and equipment.
A kind of insulation against ground resistor detecting device of cell line, it is to be made of following structure: isolating transformer is used to provide AC power; After the telefault of one end of isolating transformer secondary side and the resistance of dividing potential drop, restriction current value, first capacitances in series of isolated DC electric current with the stube cable connection that is connected dc bus, the other end of isolating transformer secondary side is connected with a of rectifier bridge end, be parallel with the rheostat of dividing potential drop and resistance value adjusting between the b of rectifier bridge, the c end and reduce the electric capacity that output voltage is pulsed, the d end of rectifier bridge is connected with earthing cable; At rheostat two ends shunt voltage signal converter; Between the mid point of the electrolytic tank of dc bus series connection and ground, be provided with the neutral earthing circuit that is used to detect the cell line mid-point voltage.
The order that described resistance, telefault, first electric capacity are connected with the isolating transformer secondary side is telefault, resistance, first electric capacity.
The two ends of the telefault of described series connection, resistance, first electric capacity are provided with fuse.
The circuit that described isolating transformer, fuse, telefault, resistance, first electric capacity, electric capacity, rheostat, voltage signal transducer constitute is arranged in the casing and is installed in the rectifier.
The secondary side voltage of described isolating transformer is less than 100V, and electric current is less than 1A in the loop.
A kind of detection method of insulation against ground resistor detecting device of cell line comprises the steps: that stube cable is connected on the big bus of rectifier direct current earthing cable ground connection; By the voltage signal transducer rheostatic magnitude of voltage is gathered in real time, voltage signal transducer and neutral earthing circuit output 4-20mA the signal is far passed are to the PLC monitoring system, by the PLC monitoring system data of gathering are carried out calculation process again, draw the insulation against ground resistance value of cell line.
Described PLC monitoring system compares the setting value of insulation against ground resistance value with itself, insulation against ground resistance is lower than setting value, then the PLC monitoring system judges that the cell line insulation against ground destroys, the PLC monitoring system is according to the magnitude of voltage of serial neutral earthing electric circuit inspection, calculate zero point offset amount, judge the electrolytic tank position of insulation breakdown.
Described PLC monitoring system can the continuous automatic inspection cell line stake resistance.
Advantageous effect of the present invention: the insulation against ground resistance value that can detect cell line behind employing the present invention in real time, and judge according to the size of insulation against ground resistance whether the insulation against ground of electrolytic tank destroys, and insulation breakdown has taken place in which platform electrolytic tank in the series, so that notify the maintainer in time to remove fault, guaranteed the safety of operating personnel and equipment.
Description of drawings
Fig. 1 is the composition frame chart of the insulation against ground resistor detecting device of cell line of the present invention.
Among the figure 1, isolating transformer; 2,6: fuse; 3, telefault; 4, resistance; 5, first electric capacity; 7, stube cable; 8, rectifier bridge; 9, electric capacity; 10, rheostat; 11, voltage signal transducer; 12, earthing cable; 13, neutral earthing circuit; 14, electrolytic tank; 15, dc bus.
Embodiment
Fig. 1 is the composition frame chart of the insulation against ground resistor detecting device of cell line of the present invention.It is to be made of following structure: isolating transformer 1 is used to provide AC power; One end of isolating transformer 1 secondary side connects with the stube cable 7 that is connected dc bus with the telefault 3 of the resistance 4 of dividing potential drop, restriction current value, first electric capacity, the 5 series connection backs of isolated DC electric current, the order that resistance 4, telefault 3, first electric capacity 5 are connected with the isolating transformer secondary side is telefault 3, resistance 4, first electric capacity 5 or telefault 3, first electric capacity 5, resistance 4, and the two ends of the telefault 3 of series connection, resistance 5, first electric capacity 5 are provided with fuse (2,6); The other end of isolating transformer 1 secondary side is connected with a of rectifier bridge 8 end, is parallel with the rheostat 10 of dividing potential drop and resistance value adjusting between the b of rectifier bridge 8, the c end and reduces the electric capacity 9 that output voltage is pulsed, and the d end of rectifier bridge 8 is connected with earthing cable 12; At rheostat 10 two ends shunt voltage signal converters 11, voltage signal transducer 11 is used for figure signal.The circuit that described isolating transformer 1, fuse (2,6), telefault 3, resistance 4, first electric capacity 5, electric capacity 9, rheostat 10, voltage signal transducer 11 constitute is arranged in the casing and is installed in the rectifier; Between the mid point of the electrolytic tank 14 of dc bus 15 series connection and ground, be provided with the neutral earthing circuit 13 that is used to detect electrolytic tank 14 serial mid-point voltages.
The secondary side voltage of described isolating transformer is less than 100V, and electric current is less than 1A in the loop.
A kind of detection method of insulation against ground resistor detecting device of cell line comprises the steps: that stube cable is connected on the negative or positive electrode of rectifier dc bus earthing cable ground connection; By the voltage signal transducer rheostatic magnitude of voltage is gathered in real time, voltage signal transducer and neutral earthing circuit output 4-20mA the signal is far passed are to the PLC monitoring system, by the PLC monitoring system data of gathering are carried out calculation process again, draw the insulation against ground resistance value of cell line.
Described PLC monitoring system compares the setting value of insulation against ground resistance value with itself, insulation against ground resistance is lower than setting value, then the PLC monitoring system judges that the cell line insulation against ground destroys, the PLC monitoring system is according to the magnitude of voltage of serial neutral earthing electric circuit inspection, calculate zero point offset amount, judge the electrolytic tank position of insulation breakdown.
Described PLC monitoring system can the continuous automatic inspection cell line stake resistance.
When the cell line insulation against ground was good, no alternating current flow through dc bus, and at this moment, the detection magnitude of voltage is 0V, and insulation against ground resistance is infinitely great; When the cell line insulation against ground destroyed, alternating current flowed back to the negative pole of pick-up unit power supply by dc bus, cell line insulation against ground breakdown point, pick-up unit earth point, at this moment, detected magnitude of voltage near 0.8V.
The PLC monitoring system compares the setting value of insulation against ground resistance value with itself, and this setting value is 10 ohm.If insulation against ground resistance is lower than setting value, then the PLC monitoring system judges that the cell line insulation against ground destroys, the PLC monitoring system calculates zero point offset amount according to the magnitude of voltage of serial neutral earthing electric circuit inspection simultaneously, judges the electrolytic tank position of insulation breakdown with this.
Claims (8)
1, a kind of insulation against ground resistor detecting device of cell line, it is characterized in that it is to be made of following structure: isolating transformer is used to provide AC power; After the telefault of one end of isolating transformer secondary side and the resistance of dividing potential drop, restriction current value, first capacitances in series of isolated DC electric current with the stube cable connection that is connected dc bus, the other end of isolating transformer secondary side is connected with a of rectifier bridge end, be parallel with the rheostat of dividing potential drop and resistance value adjusting between the b of rectifier bridge, the c end and reduce the electric capacity that output voltage is pulsed, the d end of rectifier bridge is connected with earthing cable; At rheostat two ends shunt voltage signal converter; Between the mid point of the electrolytic tank of dc bus series connection and ground, be provided with the neutral earthing circuit that is used to detect the cell line mid-point voltage.
2, the insulation against ground resistor detecting device of a kind of cell line according to claim 1 is characterized in that the order that described resistance, telefault, first electric capacity are connected with the isolating transformer secondary side is telefault, resistance, first electric capacity.
3, the insulation against ground resistor detecting device of a kind of cell line according to claim 2 is characterized in that being provided with fuse at the two ends of the telefault of connecting, resistance, first electric capacity.
4, the insulation against ground resistor detecting device of a kind of cell line according to claim 3 is characterized in that circuit that isolating transformer, fuse, telefault, resistance, first electric capacity, electric capacity, rheostat, voltage signal transducer constitute is arranged in the casing and is installed in the rectifier.
The insulation against ground resistor detecting device of 5 a kind of cell lines according to claim 1, the secondary side voltage that it is characterized in that described isolating transformer is less than 100V, and electric current is less than 1A in the loop.
6, a kind of detection method of insulation against ground resistor detecting device of cell line is characterized in that comprising the steps: that stube cable is connected on the big bus of rectifier direct current earthing cable ground connection; By the voltage signal transducer rheostatic magnitude of voltage is gathered in real time, voltage signal transducer and neutral earthing circuit output 4-20mA the signal is far passed are to the PLC monitoring system, by the PLC monitoring system data of gathering are carried out calculation process again, draw the insulation against ground resistance value of cell line.
7, the detection method of the insulation against ground resistor detecting device of a kind of cell line according to claim 6, it is characterized in that the PLC monitoring system compares the setting value of insulation against ground resistance value with itself, insulation against ground resistance is lower than setting value, then the PLC monitoring system judges that the cell line insulation against ground destroys, the PLC monitoring system is according to the magnitude of voltage of serial neutral earthing electric circuit inspection, calculate zero point offset amount, judge the electrolytic tank position of insulation breakdown.
8, the insulation against ground resistance detection method of a kind of potline according to claim 6 is characterized in that the stake resistance that described PLC monitoring system can the continuous automatic inspection cell line.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610134268.XA CN1948975B (en) | 2006-11-14 | 2006-11-14 | Apparatus and method for testing absolute resistance to ground of electrolytic tank series |
| SA07280617A SA07280617B1 (en) | 2006-11-14 | 2007-11-14 | Device and Method for Detection of Insulation Against Ground Resistance of an Electrolytic Tank Series |
| PCT/CN2007/003216 WO2008058466A1 (en) | 2006-11-14 | 2007-11-14 | A ground insulation resistance detecting device and method for electrolytic pot sets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610134268.XA CN1948975B (en) | 2006-11-14 | 2006-11-14 | Apparatus and method for testing absolute resistance to ground of electrolytic tank series |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1948975A true CN1948975A (en) | 2007-04-18 |
| CN1948975B CN1948975B (en) | 2011-04-06 |
Family
ID=38018551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610134268.XA Expired - Fee Related CN1948975B (en) | 2006-11-14 | 2006-11-14 | Apparatus and method for testing absolute resistance to ground of electrolytic tank series |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1948975B (en) |
| SA (1) | SA07280617B1 (en) |
| WO (1) | WO2008058466A1 (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058466A1 (en) * | 2006-11-14 | 2008-05-22 | China Aluminum International Engineering Corporation Limited | A ground insulation resistance detecting device and method for electrolytic pot sets |
| CN102128994A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Circuit and method for verifying reliability of current-limiting resistor |
| CN102128993A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
| CN101907680B (en) * | 2009-06-04 | 2012-06-27 | 沈阳铝镁设计研究院有限公司 | Electrolysis direct current system online insulated monitoring device and a monitoring method |
| CN102140654B (en) * | 2010-02-02 | 2013-03-20 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolysis segmental bridge type rectifier unit |
| CN103105564A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolytic cell series ground insulation intensity measuring circuit |
| CN103320815A (en) * | 2012-03-22 | 2013-09-25 | 贵阳铝镁设计研究院有限公司 | Electrolysis tank insulation detection apparatus |
| CN103701092A (en) * | 2013-12-18 | 2014-04-02 | 北京恺思维特科技有限责任公司 | Insulation resistance detection and ground protection device of DC electric system |
| CN105738752A (en) * | 2016-04-20 | 2016-07-06 | 云南云铝涌鑫铝业有限公司 | Grounding detection apparatus and detection method for electrolytic DC system |
| CN106093576A (en) * | 2016-06-02 | 2016-11-09 | 谢林 | A kind of electrolysis bath group insulation against ground resistor detection method and device |
| CN107328997A (en) * | 2017-07-10 | 2017-11-07 | 西安兴汇电力科技有限公司 | A kind of grid grounding impedance measurement method |
| CN107621572A (en) * | 2013-11-22 | 2018-01-23 | 三菱电机株式会社 | Insulation detector and electronic equipment |
| CN107748292A (en) * | 2017-12-05 | 2018-03-02 | 阳光电源股份有限公司 | One kind exchange insulation detecting circuit, system and method |
| CN108680793A (en) * | 2018-07-10 | 2018-10-19 | 天津职业技术师范大学 | A kind of pure electric automobile insulating resistor detecting circuit and its detection method |
| CN109116122A (en) * | 2018-06-27 | 2019-01-01 | 上海巴玛克电气技术有限公司 | The method that non-isolated output inverter realizes insulation against ground resistance detection |
| CN112034283A (en) * | 2020-08-19 | 2020-12-04 | 重庆尚翔电气技术有限公司 | Device, system and process for detecting and positioning aluminum electrolysis cell ground fault |
| WO2024066004A1 (en) * | 2022-09-26 | 2024-04-04 | 内蒙古霍煤鸿骏铝电有限责任公司 | Detection method for insulation-to-ground fault of aluminum electrolytic cell |
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| CN106980048B (en) * | 2017-05-17 | 2024-02-23 | 洛阳科诺工业设备有限公司 | Real-time monitoring and protecting circuit for ground resistance of induction heating coil |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| SU1437800A1 (en) * | 1987-01-16 | 1988-11-15 | Всесоюзный научно-исследовательский институт охраны труда и техники безопасности черной металлургии | Method of measuring insulation resistance of structural members of electrolyzers |
| SU1749324A1 (en) * | 1990-07-23 | 1992-07-23 | Пермский политехнический институт | Method for determining insulation resistance of electrolyzer series |
| CN2078885U (en) * | 1990-12-05 | 1991-06-12 | 杨惠平 | Digital measuring instrument of insulator resistance and bleeder current |
| JP2943133B2 (en) * | 1994-04-30 | 1999-08-30 | キヤノン株式会社 | Insulation state measuring method, insulation state determination device, and distributed power generation device using the same |
| RU2201477C1 (en) * | 2002-01-14 | 2003-03-27 | Акционерное общество открытого типа "Всероссийский алюминиево-магниевый институт" | Procedure testing resistance of insulation between electrolyzer and ground and gear for its implementation |
| CN2565028Y (en) * | 2002-08-27 | 2003-08-06 | 北京华星恒业电气设备有限公司 | Module for detecting insulation resistance of DC system |
| CN2616912Y (en) * | 2003-04-01 | 2004-05-19 | 上海亨均科技有限公司 | Cable full-distance insulation-against-ground resistance measuring device |
| CN100340702C (en) * | 2004-10-26 | 2007-10-03 | 沈阳铝镁设计研究院 | Mobile grounding monitoring device and method of electrolytic tank series bus |
| JP2006238573A (en) * | 2005-02-24 | 2006-09-07 | Meidensha Corp | Method and apparatus for measuring insulation resistance of frequency converter |
| CN1948975B (en) * | 2006-11-14 | 2011-04-06 | 沈阳铝镁设计研究院 | Apparatus and method for testing absolute resistance to ground of electrolytic tank series |
-
2006
- 2006-11-14 CN CN200610134268.XA patent/CN1948975B/en not_active Expired - Fee Related
-
2007
- 2007-11-14 SA SA07280617A patent/SA07280617B1/en unknown
- 2007-11-14 WO PCT/CN2007/003216 patent/WO2008058466A1/en active Application Filing
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008058466A1 (en) * | 2006-11-14 | 2008-05-22 | China Aluminum International Engineering Corporation Limited | A ground insulation resistance detecting device and method for electrolytic pot sets |
| CN101907680B (en) * | 2009-06-04 | 2012-06-27 | 沈阳铝镁设计研究院有限公司 | Electrolysis direct current system online insulated monitoring device and a monitoring method |
| CN102140654B (en) * | 2010-02-02 | 2013-03-20 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolysis segmental bridge type rectifier unit |
| CN102128993B (en) * | 2010-12-03 | 2013-04-03 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
| CN102128993A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Working condition verifying circuit of current-limiting resistor and verifying method thereof |
| CN102128994B (en) * | 2010-12-03 | 2013-04-03 | 海信（山东）空调有限公司 | Circuit and method for verifying reliability of current-limiting resistor |
| CN102128994A (en) * | 2010-12-03 | 2011-07-20 | 海信（山东）空调有限公司 | Circuit and method for verifying reliability of current-limiting resistor |
| CN103105564A (en) * | 2011-11-14 | 2013-05-15 | 沈阳铝镁设计研究院有限公司 | Aluminum electrolytic cell series ground insulation intensity measuring circuit |
| CN103320815A (en) * | 2012-03-22 | 2013-09-25 | 贵阳铝镁设计研究院有限公司 | Electrolysis tank insulation detection apparatus |
| CN107621572B (en) * | 2013-11-22 | 2020-06-19 | 三菱电机株式会社 | Insulation detector and electronic device |
| CN107621572A (en) * | 2013-11-22 | 2018-01-23 | 三菱电机株式会社 | Insulation detector and electronic equipment |
| CN103701092A (en) * | 2013-12-18 | 2014-04-02 | 北京恺思维特科技有限责任公司 | Insulation resistance detection and ground protection device of DC electric system |
| CN103701092B (en) * | 2013-12-18 | 2016-03-09 | 北京恺思维特科技有限责任公司 | A kind of DC electrical system insulation resistance detects and earth protective device |
| CN105738752B (en) * | 2016-04-20 | 2019-04-30 | 云南云铝涌鑫铝业有限公司 | Electrolysis direct current system ground detection device and detection method |
| CN105738752A (en) * | 2016-04-20 | 2016-07-06 | 云南云铝涌鑫铝业有限公司 | Grounding detection apparatus and detection method for electrolytic DC system |
| CN106093576A (en) * | 2016-06-02 | 2016-11-09 | 谢林 | A kind of electrolysis bath group insulation against ground resistor detection method and device |
| CN106093576B (en) * | 2016-06-02 | 2019-01-15 | 谢林 | A kind of electrolytic cell group insulation against ground resistor detection method and device |
| CN107328997A (en) * | 2017-07-10 | 2017-11-07 | 西安兴汇电力科技有限公司 | A kind of grid grounding impedance measurement method |
| CN107748292A (en) * | 2017-12-05 | 2018-03-02 | 阳光电源股份有限公司 | One kind exchange insulation detecting circuit, system and method |
| CN109116122A (en) * | 2018-06-27 | 2019-01-01 | 上海巴玛克电气技术有限公司 | The method that non-isolated output inverter realizes insulation against ground resistance detection |
| CN108680793A (en) * | 2018-07-10 | 2018-10-19 | 天津职业技术师范大学 | A kind of pure electric automobile insulating resistor detecting circuit and its detection method |
| CN108680793B (en) * | 2018-07-10 | 2023-04-28 | 天津职业技术师范大学 | Insulation resistance detection circuit and detection method for pure electric vehicle |
| CN112034283A (en) * | 2020-08-19 | 2020-12-04 | 重庆尚翔电气技术有限公司 | Device, system and process for detecting and positioning aluminum electrolysis cell ground fault |
| CN112034283B (en) * | 2020-08-19 | 2023-04-07 | 重庆尚翔电气技术有限公司 | Device, system and process for detecting and positioning aluminum electrolysis cell ground fault |
| WO2024066004A1 (en) * | 2022-09-26 | 2024-04-04 | 内蒙古霍煤鸿骏铝电有限责任公司 | Detection method for insulation-to-ground fault of aluminum electrolytic cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1948975B (en) | 2011-04-06 |
| WO2008058466A1 (en) | 2008-05-22 |
| SA07280617B1 (en) | 2011-02-13 |
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