CN113054907A - Photovoltaic module voltage withstanding test method with contact anomaly detection function - Google Patents
Photovoltaic module voltage withstanding test method with contact anomaly detection function Download PDFInfo
- Publication number
- CN113054907A CN113054907A CN202110268934.3A CN202110268934A CN113054907A CN 113054907 A CN113054907 A CN 113054907A CN 202110268934 A CN202110268934 A CN 202110268934A CN 113054907 A CN113054907 A CN 113054907A
- Authority
- CN
- China
- Prior art keywords
- voltage
- read
- tester
- output
- low
- 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
- 238000001514 detection method Methods 0.000 title claims abstract description 27
- 238000010998 test method Methods 0.000 title abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 59
- 238000005070 sampling Methods 0.000 claims abstract description 48
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 230000002159 abnormal effect Effects 0.000 claims abstract description 15
- 238000002955 isolation Methods 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000004020 conductor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a photovoltaic module voltage withstand test method with contact anomaly detection, wherein at the high-voltage end of a tester, when a high-voltage output end S3 and a voltage read-back end S4 are connected with a junction box outgoing line, the V2 reading and the V3 reading are equal; if the high-voltage output end S3 or the voltage read-back end S4 is not connected with the component, and the reading of V2 is different from that of V3, the tester outputs an abnormal detection signal, when the leakage current sampling end S5 and the low-voltage sampling end S6 are in good contact with the metal frame of the component, a loop formed by an optical coupler U1, an isolation power supply U2, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 is conducted, the optical coupler U1 works and outputs Vo; if the readings of V2 and V3 are not equal, or the optocoupler U1 does not work, Vo is not output, the test method can judge whether the contact between the test line and the photovoltaic module is reliable in the test process, and therefore misjudgment caused by poor contact is avoided.
Description
Technical Field
The invention relates to the field of photovoltaic module voltage withstand test, in particular to a photovoltaic module voltage withstand test method with contact anomaly detection.
Background
At present, the withstand voltage test of the photovoltaic module mainly tests the withstand voltage and the leakage current of insulation resistors R1 and R2 between a junction box cable and a metal frame of the module. In the test process, qualified assembly leakage current is very small, when a test connecting line is broken and not connected well or a test probe is not contacted with a metal frame, the test leakage current value is very small under the conditions, and test judgment is qualified, so that misjudgment is caused. Meanwhile, in the automatic test process, under the condition that the test fixture does not know whether the connection between the test fixture and the tested component is reliable or not, if high voltage is applied firstly and then the test wire is connected, the high voltage has the danger of breaking down a silicon wafer in a photovoltaic panel or preventing an anti-reverse diode in a junction box.
Disclosure of Invention
The invention aims to provide a photovoltaic module withstand voltage test method with contact anomaly detection, and aims to solve the technical problems that in the withstand voltage test process of a photovoltaic module in the prior art, test leakage current values are very small and test judgment is qualified due to the fact that test connecting wires are broken and not connected or a test probe is not in contact with a metal frame, so that misjudgment is caused.
In order to achieve the purpose, the photovoltaic module voltage withstand test method with the contact abnormity detection comprises the following steps:
respectively connecting a high-voltage output end S3, a voltage read-back end S4, a leakage current sampling end S5 and a low-voltage sampling end S6 of the withstand voltage tester to a lead-out wire of a junction box;
adding a voltage read-back end S4 to the high-voltage output end S3 of the withstand voltage tester, and acquiring readings V2 and V3 of the high-voltage output end S3 and the voltage read-back end S4;
a low-voltage sampling end S6 is added to the leakage current sampling end S5 of the withstand voltage tester, a low-voltage test circuit is connected in series between the leakage current sampling end S5 and the low-voltage sampling end S6, and a judgment voltage Vo is output;
and when the high-voltage end and the low-voltage end both detect signals with good contact, the tester outputs high-voltage test again, otherwise, outputs an alarm signal for abnormal detection.
Wherein, in "adding a voltage read-back terminal S4 to the high voltage output terminal S3 of the withstanding voltage tester, obtaining readings V2 and V3 of the high voltage output terminal S3 and the voltage read-back terminal S4":
when the high-voltage output end S3 and the voltage read-back end S4 are connected with the outgoing line of the junction box, the V2 reading is equal to the V3 reading.
Wherein, in "adding a voltage read-back terminal S4 to the high voltage output terminal S3 of the withstanding voltage tester, obtaining readings V2 and V3 of the high voltage output terminal S3 and the voltage read-back terminal S4":
and if the high-voltage output end S3 and the voltage read-back end S4 are not well connected with the outgoing line of the junction box, and the reading of V2 is different from the reading of V3, the voltage resistance tester outputs an abnormal detection signal.
Wherein, a low voltage test circuit is connected in series between the leakage current sampling end S5 and the low voltage sampling end S6, and outputs a judgment voltage Vo':
an isolation power supply U2, an optical coupler U1, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 are connected in series between the leakage current sampling end S5 and the low-voltage sampling end S6, and the optical coupler U1 outputs a judgment voltage Vo.
Wherein, an isolation power supply U2, an optocoupler U1, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 are connected in series between the "leakage current sampling end S5 and the low voltage sampling end S6", and the optocoupler U1 outputs a judgment voltage Vo ":
when the leakage current sampling end S5 and the low-voltage sampling end S6 are short-circuited by an external conductor, a loop formed by an optocoupler U1, an isolation power supply U2, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 is conducted, and the optocoupler U1 outputs Vo, which indicates that the leakage current sampling end S5 and the low-voltage sampling end S6 are in good contact with a metal frame.
Wherein, in "the tester exports the high-pressure test again after high-pressure side and low-voltage side all detect contact good signal" again:
when the voltage withstanding tester is used for testing, a low voltage is firstly output, the consistency of the read-back voltage V3 of the high-voltage output end S3 and the read-back voltage V2 of the voltage read-back end S4 is detected, meanwhile, the output Vo of the optocoupler U1 indicates that the contact between a test wire and a tested component is good, and then high-voltage testing is further applied.
Wherein, when the withstand voltage tester tests, firstly, a low voltage is output, the consistency of the read-back voltage V3 of the high-voltage output end S3 and the read-back voltage V2 of the voltage read-back end S4 is detected, and meanwhile, the optical coupler U1 outputs Vo, which indicates that the contact between a test line and a tested component is good, and then the high-voltage test is further applied:
if the readings of V2 and V3 are not equal, or the optocoupler U1 does not work, Vo is not output, the tester outputs an abnormal detection signal, the tester does not output a test high voltage any more, and an alarm signal is output.
According to the photovoltaic module voltage withstand test method with the contact anomaly detection function, when a high-voltage output end S3 and a voltage read-back end S4 of a high-voltage end of a tester are connected with outgoing lines of a junction box, the V2 reading and the V3 reading are equal; if the high-voltage output end S3 or the voltage read-back end S4 is not connected with the component, and the reading of V2 is different from that of V3, the tester outputs an abnormal detection signal, the low-voltage end of the tester is connected, when the leakage current sampling end S5 and the low-voltage sampling end S6 are in good contact with the metal frame of the component, a loop formed by the optocoupler U1, the isolation power supply U2, the current-limiting protection resistor R6 and the current-limiting protection resistor R7 is conducted, the optocoupler U1 works to output Vo, and the tester outputs a high-voltage test after the high-voltage end and the low-voltage end detect the signals in good contact; if the readings of V2 and V3 are not equal, or the optocoupler U1 does not work, Vo is not output, the tester outputs an abnormal detection signal, the tester does not output a test high voltage any more, and an alarm signal is output.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of connection between a common withstand voltage tester and a photovoltaic module.
FIG. 2 is a schematic view of the connection of the tester of the present invention to a photovoltaic module.
Fig. 3 is a schematic diagram of the testing principle of fig. 1.
Fig. 4 is a schematic diagram of the testing principle of fig. 2.
Fig. 5 is a flow chart of a photovoltaic module withstand voltage testing method with contact anomaly detection according to the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 5, the invention provides a photovoltaic module withstand voltage testing method with contact anomaly detection, which includes the following steps:
s1001: respectively connecting a high-voltage output end S3, a voltage read-back end S4, a leakage current sampling end S5 and a low-voltage sampling end S6 of the withstand voltage tester to a lead-out wire of a junction box;
s1002: adding a voltage read-back end S4 to the high-voltage output end S3 of the withstand voltage tester, acquiring readings V2 and V3 of the high-voltage output end S3 and the voltage read-back end S4, when the high-voltage output end S3 and the voltage read-back end S4 are connected with a junction box outgoing line, the reading V2 is equal to the reading V3, and if the high-voltage output end S3 and the voltage read-back end S4 are not connected with the junction box outgoing line, and the reading V2 is different from the reading V3, the withstand voltage tester outputs an abnormal detection signal;
s1003: a low-voltage sampling end S6 is added to the leakage current sampling end S5 of the withstand voltage tester, an isolation power supply U2, an optical coupler U1, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 are connected in series between the leakage current sampling end S5 and the low-voltage sampling end S6, the optical coupler U1 outputs a judgment voltage Vo, when the leakage current sampling end S5 and the low-voltage sampling end S6 are short-circuited by an external conductor, a loop formed by the optical coupler U1, the isolation power supply U2, the current-limiting protection resistor R6 and the current-limiting protection resistor R7 is conducted, and the optical coupler U1 outputs Vo, which indicates that the leakage current sampling end S5 and the low-voltage sampling end S6 are in good contact with a metal frame;
s1004: when the voltage-withstanding tester is used for testing, a low voltage is output firstly, the read-back voltage V3 of the high-voltage output end S3 is detected to be consistent with the read-back voltage V2 of the voltage read-back end S4, meanwhile, the optical coupler U1 outputs Vo, the fact that contact between a test line and a tested component is good is indicated, then high-voltage testing is further applied, otherwise, an alarm signal of abnormal detection is output, if the readings of V2 and V3 are not equal, or the optical coupler U1 does not work, Vo is not output, the tester outputs an abnormal detection signal, the tester does not output testing high voltage any more, and the alarm signal is output.
In the present embodiment, as shown in fig. 2, the test line is added with a high voltage read-back terminal S4 and a low voltage sampling terminal S6, the terminal S4 is added with a V2 read-back voltage, and the terminal S6 is added with a Vo determination voltage.
As a further scheme of the invention: referring to fig. 2, a read-back end S4 is added to the high-voltage end of the tester, and two photovoltaic module junction box leading-out wires are respectively connected to S3 and S4. Referring to fig. 4, the tester S3 terminal is similar to the S1 terminal circuit of fig. 3, and has a current limiting resistor R8, voltage dividing resistors R9 and R10, and a read-back voltage V3; a read-back circuit is added at the S4 end of the tester, and the read-back circuit comprises R11 and R12 voltage dividing resistors and V2 read-back voltage.
As a further scheme of the invention: referring to fig. 2, the low voltage end of the tester is additionally provided with a sampling end S6, and S5 are respectively connected to the metal frame of the photovoltaic module. As shown in fig. 4, the tester S6 is terminated with the R6 protection resistor, and a Z1 voltage regulator tube is added between the tester S6 and the S5; and a U2 isolation power supply, a U1 optical coupler chip and an R7 protection resistor are arranged between the S5 and the S6.
As a further scheme of the invention: the determination voltage Vo is increased. During testing, the voltage withstand instrument outputs a low voltage firstly, and when S5 and S6 are connected with the photovoltaic module well and Vo is output, the low voltage end is in good contact with the frame of the module.
The working principle of the invention is as follows: the high-voltage end of the tester has the advantages that when S3 and S4 are connected with the outgoing lines of the junction box, the V2 reading is equal to the V3 reading; if either S3 or S4 is not connected to the module and the V2 reading is different from the V3 reading, the tester outputs an anomaly detection signal. At the low-voltage end of the tester, when the S5 and the S6 are in good contact with the metal frame of the component, a loop consisting of U1, U2, R6 and R7 is conducted, and U1 works to output Vo. When the high-voltage end and the low-voltage end both detect signals with good contact, the tester outputs a high-voltage test; if the readings of V2 and V3 are not equal, or U1 does not work and Vo is not output, the tester outputs an abnormal detection signal, the tester does not output a test high voltage any more, and an alarm signal is output.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The photovoltaic module withstand voltage testing method with the function of contact anomaly detection is characterized by comprising the following steps:
respectively connecting a high-voltage output end S3, a voltage read-back end S4, a leakage current sampling end S5 and a low-voltage sampling end S6 of the withstand voltage tester to a lead-out wire of a junction box;
adding a voltage read-back end S4 to the high-voltage output end S3 of the withstand voltage tester, and acquiring readings V2 and V3 of the high-voltage output end S3 and the voltage read-back end S4;
a low-voltage sampling end S6 is added to the leakage current sampling end S5 of the withstand voltage tester, a low-voltage test circuit is connected in series between the leakage current sampling end S5 and the low-voltage sampling end S6, and a judgment voltage Vo is output;
and when the high-voltage end and the low-voltage end both detect signals with good contact, the tester outputs high-voltage test again, otherwise, outputs an alarm signal for abnormal detection.
2. The method of claim 1, wherein a voltage read-back terminal S4 is added to the high voltage output terminal S3 of the withstanding voltage tester, and the readings V2 and V3 of the high voltage output terminal S3 and the voltage read-back terminal S4 are obtained,
when the high-voltage output end S3 and the voltage read-back end S4 are connected with the outgoing line of the junction box, the V2 reading is equal to the V3 reading.
3. The method of claim 1, wherein a voltage read-back terminal S4 is added to the high voltage output terminal S3 of the withstanding voltage tester, and the readings V2 and V3 of the high voltage output terminal S3 and the voltage read-back terminal S4 are obtained,
and if the high-voltage output end S3 and the voltage read-back end S4 are not well connected with the outgoing line of the junction box, and the reading of V2 is different from the reading of V3, the voltage resistance tester outputs an abnormal detection signal.
4. The method according to claim 1, wherein a low voltage test circuit is connected in series between the leakage current sampling terminal S5 and the low voltage sampling terminal S6 to output a judgment voltage Vo,
an isolation power supply U2, an optical coupler U1, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 are connected in series between the leakage current sampling end S5 and the low-voltage sampling end S6, and the optical coupler U1 outputs a judgment voltage Vo.
5. The method for testing the withstand voltage of the photovoltaic module with the contact anomaly detection function as claimed in claim 4, wherein an isolation power supply U2, an optical coupler U1, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 are connected in series between the leakage current sampling end S5 and the low voltage sampling end S6, and the optical coupler U1 outputs a judgment voltage Vo ",
when the leakage current sampling end S5 and the low-voltage sampling end S6 are short-circuited by an external conductor, a loop formed by an optocoupler U1, an isolation power supply U2, a current-limiting protection resistor R6 and a current-limiting protection resistor R7 is conducted, and the optocoupler U1 outputs Vo, which indicates that the leakage current sampling end S5 and the low-voltage sampling end S6 are in good contact with a metal frame.
6. The method for testing the withstand voltage of a photovoltaic module with abnormal contact detection according to claim 1, wherein in the "outputting the high voltage test by the tester after the high voltage terminal and the low voltage terminal detect the signal with good contact",
when the voltage withstanding tester is used for testing, a low voltage is firstly output, the consistency of the read-back voltage V3 of the high-voltage output end S3 and the read-back voltage V2 of the voltage read-back end S4 is detected, meanwhile, the output Vo of the optocoupler U1 indicates that the contact between a test wire and a tested component is good, and then high-voltage testing is further applied.
7. The method for testing the withstand voltage of the photovoltaic module with the abnormal contact detection as claimed in claim 6, wherein during the "test of the withstand voltage tester, a low voltage is output first, the read-back voltage V3 of the high voltage output terminal S3 is detected to be consistent with the read-back voltage V2 of the voltage read-back terminal S4, and meanwhile, the optical coupler U1 has an output Vo, which indicates that the contact between the test line and the tested module is good, and then the high voltage test is further applied",
if the readings of V2 and V3 are not equal, or the optocoupler U1 does not work, Vo is not output, the tester outputs an abnormal detection signal, the tester does not output a test high voltage any more, and an alarm signal is output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110268934.3A CN113054907A (en) | 2021-03-12 | 2021-03-12 | Photovoltaic module voltage withstanding test method with contact anomaly detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110268934.3A CN113054907A (en) | 2021-03-12 | 2021-03-12 | Photovoltaic module voltage withstanding test method with contact anomaly detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113054907A true CN113054907A (en) | 2021-06-29 |
Family
ID=76511912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110268934.3A Pending CN113054907A (en) | 2021-03-12 | 2021-03-12 | Photovoltaic module voltage withstanding test method with contact anomaly detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113054907A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574279Y (en) * | 2002-10-09 | 2003-09-17 | 刘玉环 | Cell charging circuit |
| CN101216517A (en) * | 2007-01-05 | 2008-07-09 | 中兴通讯股份有限公司 | Connecting apparatus for equipment pressure resistance test |
| CN101308189A (en) * | 2008-06-24 | 2008-11-19 | 中国科学院电工研究所 | Medium insulation properties measuring apparatus for gas-liquid two-phase fluid state |
| CN101470154A (en) * | 2007-12-28 | 2009-07-01 | 北京机械工业学院 | Pressure-resistant test system |
| CN102074927A (en) * | 2010-12-13 | 2011-05-25 | 南京民盛电子仪器有限公司 | Earth leakage protection circuit of withstand voltage tester |
| CN102680363A (en) * | 2012-05-10 | 2012-09-19 | 天津大学 | Composite insulator hydrophobicity evaluating device and method based on dynamic drip ultrasound characteristic |
| CN102692591A (en) * | 2012-06-19 | 2012-09-26 | 科博达技术有限公司 | Device and method for detecting insulation failures of high and low voltage ends |
| CN102735959A (en) * | 2012-05-29 | 2012-10-17 | 辽宁省电力有限公司 | On-line ultrahigh-voltage line power transformer test method |
| CN104375063A (en) * | 2013-08-14 | 2015-02-25 | 中兴通讯股份有限公司 | Extreme withstand voltage testing device and method |
| JP5743296B1 (en) * | 2014-12-14 | 2015-07-01 | 修 板本 | Leakage location exploration method and apparatus |
-
2021
- 2021-03-12 CN CN202110268934.3A patent/CN113054907A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2574279Y (en) * | 2002-10-09 | 2003-09-17 | 刘玉环 | Cell charging circuit |
| CN101216517A (en) * | 2007-01-05 | 2008-07-09 | 中兴通讯股份有限公司 | Connecting apparatus for equipment pressure resistance test |
| CN101470154A (en) * | 2007-12-28 | 2009-07-01 | 北京机械工业学院 | Pressure-resistant test system |
| CN101308189A (en) * | 2008-06-24 | 2008-11-19 | 中国科学院电工研究所 | Medium insulation properties measuring apparatus for gas-liquid two-phase fluid state |
| CN102074927A (en) * | 2010-12-13 | 2011-05-25 | 南京民盛电子仪器有限公司 | Earth leakage protection circuit of withstand voltage tester |
| CN102680363A (en) * | 2012-05-10 | 2012-09-19 | 天津大学 | Composite insulator hydrophobicity evaluating device and method based on dynamic drip ultrasound characteristic |
| CN102735959A (en) * | 2012-05-29 | 2012-10-17 | 辽宁省电力有限公司 | On-line ultrahigh-voltage line power transformer test method |
| CN102692591A (en) * | 2012-06-19 | 2012-09-26 | 科博达技术有限公司 | Device and method for detecting insulation failures of high and low voltage ends |
| CN104375063A (en) * | 2013-08-14 | 2015-02-25 | 中兴通讯股份有限公司 | Extreme withstand voltage testing device and method |
| JP5743296B1 (en) * | 2014-12-14 | 2015-07-01 | 修 板本 | Leakage location exploration method and apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103888885B (en) | Miniature microphone capacitance test method | |
| CN104569661A (en) | HDMI interface testing circuit and device | |
| CN111965563A (en) | Flat cable detection device | |
| CN106569085A (en) | Current transformer secondary circuit cable checking method | |
| CN103543321A (en) | Polarization-depolarization current detection device for crosslinked polyethylene medium-voltage cable | |
| CN201000474Y (en) | Circuit fault indicator | |
| CN101713809A (en) | Checking method of CT secondary wire in switch cabinet | |
| CN113054907A (en) | Photovoltaic module voltage withstanding test method with contact anomaly detection function | |
| CN204008943U (en) | Multicore cable terminal compression joint quality device for fast detecting | |
| CN208421123U (en) | A kind of high density electrical connector assembly short-circuit test device | |
| CN106154212B (en) | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load | |
| CN110006325A (en) | A kind of deformation of transformer winding intelligent detecting method based on frequency sweep impedance | |
| CN212540594U (en) | Product detection circuit in withstand voltage test | |
| CN208125876U (en) | A kind of triode Kelvin test suite | |
| CN104062537B (en) | Multicore cable terminal compression joint quality device for fast detecting and detection method | |
| CN105487033A (en) | Calibration device of wire rod tester | |
| CN216848067U (en) | Portable six-in-one spot inspection device | |
| CN219266362U (en) | Signal switching device for low-voltage component connector of automobile | |
| CN204758739U (en) | Direct current return circuit error detection ware | |
| CN112098900B (en) | Testing device and testing method for cable connection state | |
| CN216248110U (en) | Universal meter test protection circuit | |
| CN213843493U (en) | Transformer bushing live-line test sampling unit detection device and system | |
| CN220271473U (en) | Multi-channel cable joint insulation auxiliary tester | |
| CN215599306U (en) | Test system for detecting chip latch-up | |
| CN220820160U (en) | LED lamp strip detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |