CN202903884U - Inverter insulation resistance detection circuit - Google Patents
Inverter insulation resistance detection circuit Download PDFInfo
- Publication number
- CN202903884U CN202903884U CN 201220623392 CN201220623392U CN202903884U CN 202903884 U CN202903884 U CN 202903884U CN 201220623392 CN201220623392 CN 201220623392 CN 201220623392 U CN201220623392 U CN 201220623392U CN 202903884 U CN202903884 U CN 202903884U
- Authority
- CN
- China
- Prior art keywords
- resistance
- voltage
- resistor
- impedance
- detection circuit
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses an inverter insulation resistance detection circuit, comprising first voltage, second voltage, a first resistance connected on an end of the first voltage, a first resistor connected on the other end, and a second resistance and a third resistor connected in parallel with an end of the second voltage. The other end of the second voltage is connected with the first resistor through a relay. The second resistance is connected with the first resistance. The third resistor is connected with a second resistor. The first resistance, the first resistor, and the second resistor are connected with ground. The insulation resistance detection circuit overcomes a problem of relatively large detection deviation, and can detect actual resistance values of R.x and R.y. The insulation resistance detection circuit completely meets requirements of cell panel grounding detection. The insulation resistance detection circuit can effectively find short circuit, electric leakage, and other problems, thereby protecting life safety of personnel.
Description
Technical field
The utility model relates to a kind of testing circuit, in particular to a kind of inverter insulation impedance testing circuit.
Background technology
Inverter is when work, because the people can directly touch the surface of cell panel, if the cell panel ground short circuit, in the time of human body touch, leakage current may injure people's life security, thus any inverter before work, whether the ground connection that must initiatively remove to detect cell panel good.
Existing insulation impedance testing circuit is difficult to detect the resistance value of R.x and R.y, and especially when R.x equated with the R.y impedance and is lower than the requirement resistance value, detection error was very large.If there is such situation, there is certain hidden danger in human-body safety.
The utility model content
The purpose of this utility model is to overcome the above problem that prior art exists, and a kind of inverter insulation impedance testing circuit is provided, and whether the ground connection of active detecting cell panel is good, effectively finds the problems such as short circuit electric leakage, protection personnel life security.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of inverter insulation impedance testing circuit, comprise the first voltage, second voltage, described the first voltage one end is connected with the first impedance, the other end is connected with the first resistance, described second voltage one end connection is parallel with the second impedance, the 3rd resistance, and the other end is connected in described the first resistance by relay, and described the second impedance is connected in the first impedance, described the 3rd resistance is connected with the second resistance, described the first impedance, the first resistance, the second resistance eutral grounding.
The beneficial effects of the utility model are:
Insulation impedance testing circuit of the present utility model has overcome the larger problem of detection error, and can detect R.x, and the real impedance values of R.y meets cell panel ground connection testing requirement fully.Effectively find the problems such as short circuit electric leakage, protection personnel life security.
Above-mentioned explanation only is the general introduction of technical solutions of the utility model, for can clearer understanding technological means of the present utility model, and can be implemented according to the content of instructions, below with preferred embodiment of the present utility model and cooperate accompanying drawing to be described in detail as follows.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, consists of the application's a part, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 the utility model circuit diagram.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
With reference to shown in Figure 1, a kind of inverter insulation impedance testing circuit, comprise the first voltage PV+, second voltage PV-, described the first voltage PV+ one end is connected with the first impedance Rx, the other end is connected with the first resistance R 1, described second voltage PV-one end connection is parallel with the second impedance Ry, the 3rd resistance R 3, the other end is connected in described the first resistance R 1 by relay SW, described the second impedance Ry is connected in the first impedance Rx, described the 3rd resistance R 3 is connected with the second resistance R 2, described the first impedance Rx, the first resistance R 1, the second resistance R 2 ground connection.
Before relay was not closed, by the sampled voltage of the first known voltage PV+ and the sampled voltage of iso signal, one of row were about the first impedance Rx, the equation of the second impedance Ry.
After the relay closes, by the sampled voltage of the first known voltage PV+ and the sampled voltage of iso signal, list another about the first impedance Rx, the equation of the second impedance Ry.By 2 equations, can solve the impedance of the first impedance Rx and the second impedance Ry.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (1)
1. inverter insulation impedance testing circuit, it is characterized in that: comprise the first voltage (PV+), second voltage (PV-), described the first voltage (PV+) end is connected with the first impedance (Rx), the other end is connected with the first resistance (R1), the connection of described second voltage (PV-) end is parallel with the second impedance (Ry), the 3rd resistance (R3), the other end is connected in described the first resistance (R1) by relay (SW), described the second impedance (Ry) is connected in the first impedance (Rx), described the 3rd resistance (R3) is connected with the second resistance (R2), described the first impedance (Rx), the first resistance (R1), the second resistance (R2) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220623392 CN202903884U (en) | 2012-11-22 | 2012-11-22 | Inverter insulation resistance detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220623392 CN202903884U (en) | 2012-11-22 | 2012-11-22 | Inverter insulation resistance detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202903884U true CN202903884U (en) | 2013-04-24 |
Family
ID=48124541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220623392 Expired - Fee Related CN202903884U (en) | 2012-11-22 | 2012-11-22 | Inverter insulation resistance detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202903884U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083230A (en) * | 2020-09-07 | 2020-12-15 | 爱士惟新能源技术(江苏)有限公司 | Ground insulation impedance detection circuit and method of grid-connected inverter |
-
2012
- 2012-11-22 CN CN 201220623392 patent/CN202903884U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112083230A (en) * | 2020-09-07 | 2020-12-15 | 爱士惟新能源技术(江苏)有限公司 | Ground insulation impedance detection circuit and method of grid-connected inverter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104049136A (en) | High voltage cell set system isolation total voltage and insulation resistance detection circuit and detection method thereof | |
| CN201584745U (en) | Overvoltage and undervoltage protection device with function of time delay | |
| CN205900958U (en) | Intelligent security socket with child protection function | |
| CN104155505A (en) | Ground wire electrification detection device, air conditioner and electrical equipment | |
| CN202903884U (en) | Inverter insulation resistance detection circuit | |
| CN208954274U (en) | A kind of detection warning device of strong magnetic field proof interference stealing | |
| CN103308755B (en) | The insulation detection device of high voltage direct current remote electric power system and method | |
| CN203909201U (en) | DC output electric leakage detection circuit | |
| CN104571367A (en) | Case with electric leakage detection function | |
| CN203337736U (en) | Lithium battery insulation resistance online detection circuit | |
| CN204925229U (en) | Domestic appliance warning device that leaks electricity | |
| CN104917154A (en) | Electric leakage protection device for direct-current power supply of streetcar | |
| CN204575747U (en) | Equipment ground impedance self-checking circuit | |
| CN203707756U (en) | Electric leakage protection device for direct-current power supply of streetcar | |
| CN203949950U (en) | A kind of ammeter with earth leakage detection functions | |
| CN202693726U (en) | Detection circuit and detection system for electric transmission and transformation equipment | |
| CN203632611U (en) | Device capable of simultaneously realizing photovoltaic power station cathode grounding and ground insulation impedance detection | |
| CN203986245U (en) | Low tension insulating gloves with electroscopic device | |
| CN203825132U (en) | Multipoint insulation fault detection circuit for output bus of power battery | |
| CN202940393U (en) | Leakage protection plug | |
| CN207249051U (en) | A kind of industrial frequency withstand voltage test device | |
| CN204067865U (en) | A kind of high-voltage terminal cabinet protector | |
| CN205829162U (en) | A kind of pulsed over pressure protection circuit for rescuing winch | |
| CN204793643U (en) | Low -voltage distribution ground system | |
| CN204029100U (en) | A kind of residual-current electrical fire monitor signal processing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20181122 |