CN202351328U - Three-channel direct-current resistance tester - Google Patents
Three-channel direct-current resistance tester Download PDFInfo
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- CN202351328U CN202351328U CN2011204335491U CN201120433549U CN202351328U CN 202351328 U CN202351328 U CN 202351328U CN 2011204335491 U CN2011204335491 U CN 2011204335491U CN 201120433549 U CN201120433549 U CN 201120433549U CN 202351328 U CN202351328 U CN 202351328U
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Abstract
The utility model belongs to the technical field of measuring instruments and particularly relates to a three-channel direct-current resistance tester which solves the problems that in the prior art, the design is not reasonable enough, and the like. The three-channel direct-current resistance tester comprises a central processing unit which is connected with a display screen and an input device. The central processing unit is connected with a voltage processing channel capable of switching voltage sampling channels and performing voltage signal processing and a current processing channel capable of switching current directions and performing current signal processing. A magnetic assisting switching relay circuit connected to the central processing unit is arranged between the voltage processing channel and the current processing channel. Compared with the prior art, the three-channel direct-current resistance tester has the advantages that a single channel (including a central lead) can be tested while three-channel testing is performed, poor conditions of the central lead can be effectively avoided, accidents during running of a transformer are avoided, the testing speed can be improved, and the advantages of the three-channel testing are embodied.
Description
Technical field
The utility model belongs to the surveying instrument technical field, especially relates to a kind of triple channel direct resistance metering appearance.
Background technology
Existing triple channel testing tool usually when carrying out the triple channel direct resistance metering because shouting pain flows to relation, the electric current central tap of not flowing through; The O/o end is just as sampling reference ground; Ignore central tap easily like this,, can't embody the advantage of triple channel test like this if before test, try again the single channel test; Still approach the single channel test in the operation, the fast and convenient method of testing of the customer requirement of still can't having a full house.For this reason, people have carried out long-term exploration, have proposed various solutions, but all do not obtain comparatively desirable scheme.
Summary of the invention
The purpose of the utility model is to the problems referred to above, provides a kind of and can effectively avoid the central tap unfavorable condition, avoids when transformer moves, having an accident, and also can improve test speed, embodies the triple channel direct resistance metering appearance of triple channel test advantage.
For achieving the above object; The utility model has adopted following technical proposal: this triple channel direct resistance metering appearance; Be connected on the three-phase transformer; Comprise central processing unit, on central processing unit, be connected with display screen and input media, it is characterized in that; Be connected with on the described central processing unit can the switched voltage sampling channel and carry out voltage treatment channel that voltage signal handles with can the switch current direction and carry out the current processing passage that current signal is handled, be provided with the magnetic assist transfer relay circuit that is connected on the central processing unit between described voltage treatment channel and the current processing passage.
Research through prior art; The inventor finds as long as between test product and sampling, add the switching channel relay circuit; Control current powers up mode and direction and voltage sampling circuit when triple channel is tested as long as in program like this; Just can avoid repetitive operation, improve test speed, also can not influence test result.
In above-mentioned triple channel direct resistance metering appearance; Described voltage treatment channel comprises the voltage channel transfer relay circuit that is connected three-phase transformer high-pressure side or low-pressure side; Between voltage channel transfer relay circuit and central processing unit, be serially connected with voltage sample filtering circuit, first programmable amplifier and an A/D sampling A successively; Described first programmable amplifier is also direct-connected with central processing unit, and described voltage channel transfer relay circuit is also direct-connected with central processing unit.
In above-mentioned triple channel direct resistance metering appearance; Described current processing passage comprises the current channel transfer relay circuit that is serially connected on transformer high-voltage side or the low-pressure side three phase winding shunts; Between current channel transfer relay circuit and central processing unit, be serially connected with current sample filtering circuit, second programmable amplifier and the 2nd A/D sampling A successively; Described second programmable amplifier is also direct-connected with central processing unit, and described current channel transfer relay circuit is also direct-connected with central processing unit.
In above-mentioned triple channel direct resistance metering appearance, also be connected with temperature sensor on the described central processing unit.
In above-mentioned triple channel direct resistance metering appearance, also be connected with any one or multiple combination in USB interface, communication interface and the printer on the described central processing unit.
In above-mentioned triple channel direct resistance metering appearance, also be provided with crowbar circuit between described voltage treatment channel and the current processing passage.
Compared with prior art; The advantage of this triple channel direct resistance metering appearance is: when carrying out the triple channel test, can test single channel (comprising central tap) simultaneously; Can effectively avoid the central tap unfavorable condition; Avoid when transformer moves, having an accident, also can improve test speed, embody triple channel test advantage.
Description of drawings
Fig. 1 is the theory diagram that the utility model provides.
Fig. 2 be the utility model provide carry out triple channel when test single channel (AO) test the time theory diagram.
Theory diagram when Fig. 3 is the triple channel test of carrying out after the completion band lead-in wire test that provides of the utility model.
Among the figure, central processing unit 1, display screen 2, input media 3, magnetic assist transfer relay circuit 4, voltage channel transfer relay circuit 5, voltage sample filtering circuit 6, first programmable amplifier 7, an A/D sampling A 8, current channel transfer relay circuit 9, current sample filtering circuit 10, second programmable amplifier 11, the 2nd A/D sampling A 12, temperature sensor 13, usb 14, communication interface 15, printer 16, crowbar circuit 17, three-phase transformer 100.
Embodiment
Shown in Fig. 1-3, this triple channel direct resistance metering appearance is connected on the three-phase transformer 100, comprises central processing unit 1, on central processing unit 1, is connected with display screen 2 and input media 3.Be connected with on the central processing unit 1 can the switched voltage sampling channel and carry out voltage treatment channel that voltage signal handles with can the switch current direction and carry out the current processing passage that current signal is handled, be provided with the magnetic assist transfer relay circuit 4 that is connected on the central processing unit 1 between voltage treatment channel and the current processing passage.Also be connected with any one or multiple combination in temperature sensor 13, usb 14, communication interface 15 and the printer 16 on the central processing unit 1.Also be provided with crowbar circuit 17 between voltage treatment channel and the current processing passage.
The voltage treatment channel comprises the voltage channel transfer relay circuit 5 that is connected three-phase transformer 100 high-pressure sides or low-pressure side; Between voltage channel transfer relay circuit 5 and central processing unit 1, be serially connected with voltage sample filtering circuit 6, first programmable amplifier 7 and an A/D sampling A 8 successively; Described first programmable amplifier 7 is also direct-connected with central processing unit 1, and described voltage channel transfer relay circuit 5 is also direct-connected with central processing unit 1.
The current processing passage comprises the current channel transfer relay circuit 9 that is serially connected on transformer high-voltage side or the low-pressure side three phase winding shunts; Between current channel transfer relay circuit 9 and central processing unit 1, be serially connected with current sample filtering circuit 10, second programmable amplifier 11 and the 2nd A/D sampling A 12 successively; Described second programmable amplifier 11 is also direct-connected with central processing unit 1, and described current channel transfer relay circuit 9 is also direct-connected with central processing unit 1.
First programmable amplifier 7 is used to dwindle or the signal of follow current shunt, effect: obtain more stable voltage more accurately; Second programmable amplifier 11 is used to amplify or the signal of follow current shunt, effect: obtain more stable electric current more accurately.Undesired signal in the current sample filtering circuit 10 filtering current signals.Get undesired signal in the voltage sample filtering circuit 6 filtering voltage signals.Current channel transfer relay circuit 9 is used for: drawback and deficiency when improving the triple channel test.Crowbar circuit 17 absorbs the inverse electromotive force of inductive load, the protection instrument.Magnetic assist transfer relay circuit 4 is used to improve the test speed of the big transformer of three-phase five-limb.Drawback and deficiency when voltage channel transfer relay circuit 5 improves the triple channel test.Temperature sensor 13 is used to detect ambient temperature, is used for the conversion of test result.Display screen 2 is used for display interface and test result.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although this paper has used terms such as central processing unit 1, display screen 2, input media 3, magnetic assist transfer relay circuit 4, voltage channel transfer relay circuit 5, voltage sample filtering circuit 6, first programmable amplifier 7, an A/D sampling A 8, current channel transfer relay circuit 9, current sample filtering circuit 10, second programmable amplifier 11, the 2nd A/D sampling A 12, temperature sensor 13, usb 14, communication interface 15, printer 16, crowbar circuit 17, three-phase transformer 100 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (6)
1. triple channel direct resistance metering appearance; Be connected on the three-phase transformer (100); Comprise central processing unit (1); On central processing unit (1), be connected with display screen (2) and input media (3); It is characterized in that, be connected with on the described central processing unit (1) can the switched voltage sampling channel and carry out voltage treatment channel that voltage signal handles with can the switch current direction and carry out the current processing passage that current signal is handled, be provided with the magnetic assist transfer relay circuit (4) that is connected on the central processing unit (1) between described voltage treatment channel and the current processing passage.
2. triple channel direct resistance metering appearance according to claim 1; It is characterized in that; Described voltage treatment channel comprises the voltage channel transfer relay circuit (5) that is connected three-phase transformer (100) high-pressure side or low-pressure side; Between voltage channel transfer relay circuit (5) and central processing unit (1), be serially connected with voltage sample filtering circuit (6), first programmable amplifier (7) and an A/D sampling A (8) successively; Described first programmable amplifier (7) is also direct-connected with central processing unit (1), and described voltage channel transfer relay circuit (5) is also direct-connected with central processing unit (1).
3. triple channel direct resistance metering appearance according to claim 1; It is characterized in that; Described current processing passage comprises the current channel transfer relay circuit (9) that is serially connected on transformer high-voltage side or the low-pressure side three phase winding shunts; Between current channel transfer relay circuit (9) and central processing unit (1), be serially connected with current sample filtering circuit (10), second programmable amplifier (11) and the 2nd A/D sampling A (12) successively; Described second programmable amplifier (11) is also direct-connected with central processing unit (1), and described current channel transfer relay circuit (9) is also direct-connected with central processing unit (1).
4. according to claim 1 or 2 or 3 described triple channel direct resistance metering appearance, it is characterized in that, also be connected with temperature sensor (13) on the described central processing unit (1).
5. according to claim 1 or 2 or 3 described triple channel direct resistance metering appearance, it is characterized in that, also be connected with any one or multiple combination in USB interface (14), communication interface (15) and the printer (16) on the described central processing unit (1).
6. triple channel direct resistance metering appearance according to claim 5 is characterized in that, also is provided with crowbar circuit (17) between described voltage treatment channel and the current processing passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204335491U CN202351328U (en) | 2011-11-03 | 2011-11-03 | Three-channel direct-current resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204335491U CN202351328U (en) | 2011-11-03 | 2011-11-03 | Three-channel direct-current resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202351328U true CN202351328U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204335491U Expired - Fee Related CN202351328U (en) | 2011-11-03 | 2011-11-03 | Three-channel direct-current resistance tester |
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| Country | Link |
|---|---|
| CN (1) | CN202351328U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090167A (en) * | 2014-07-18 | 2014-10-08 | 苏州华兴源创电子科技有限公司 | Impedance measuring device and method of liquid crystal module |
| CN105842541A (en) * | 2016-04-12 | 2016-08-10 | 贵州电网有限责任公司都匀供电局 | Rapid testing apparatus and testing method for large scale transformer's direct current resistance |
-
2011
- 2011-11-03 CN CN2011204335491U patent/CN202351328U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104090167A (en) * | 2014-07-18 | 2014-10-08 | 苏州华兴源创电子科技有限公司 | Impedance measuring device and method of liquid crystal module |
| CN104090167B (en) * | 2014-07-18 | 2017-01-18 | 苏州华兴源创电子科技有限公司 | Impedance measuring device and method of liquid crystal module |
| CN105842541A (en) * | 2016-04-12 | 2016-08-10 | 贵州电网有限责任公司都匀供电局 | Rapid testing apparatus and testing method for large scale transformer's direct current resistance |
| CN105842541B (en) * | 2016-04-12 | 2018-09-21 | 贵州电网有限责任公司都匀供电局 | A kind of direct current resistance of large transformer device for quick testing and test method |
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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 |
Granted publication date: 20120725 Termination date: 20141103 |
|
| EXPY | Termination of patent right or utility model |