CN205246748U - High precision measurement's test equipment can carry out examination article leakage current - Google Patents
High precision measurement's test equipment can carry out examination article leakage current Download PDFInfo
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- CN205246748U CN205246748U CN201520674858.6U CN201520674858U CN205246748U CN 205246748 U CN205246748 U CN 205246748U CN 201520674858 U CN201520674858 U CN 201520674858U CN 205246748 U CN205246748 U CN 205246748U
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Abstract
The utility model discloses a high precision measurement's test equipment can carry out examination article leakage current, it includes host computer, high voltage direct current genera tor, high -pressure test wire, electric current collection module and insulation support structure, high pressure test wire upper end junction current sampling module, high voltage direct current genera tor is connected to the lower extreme, electric current collection module connects semi -circular metal hook, and high -pressure test wire is connected to electric current collection module's lower extreme, and electric current collection module fixes the lower part upper end at an insulating empty section of thick bamboo, the insulating empty section of thick bamboo on the upper portion of insulation support structure supports the side surface part at the examination article with the help of insulation support, and the insulation support pole lower extreme of insulation support structure lower part supports in subaerial, high voltage direct current genera tor's top binding post connects the lower extreme of high -pressure test wire. Adopt the utility model discloses the accuracy that can avoid leakage current on the test lead to influence the test result reduces electric testing personnel electric shock risk simultaneously.
Description
Technical field
The utility model relates to a kind of experimental rig of testing test product Leakage Current, specifically a kind of at test specimen high-pressure sideDirectly measure leakage current values, and wireless mode is to the experimental rig of main frame transmission data message, the test product in literary composition is for lightning-arrestThe products such as device, straight bottle, sleeve pipe and transformer.
Background technology
At present, other power products such as arrester, often need to test its Leakage Current, generally have following shortcoming:
1, the leakage current on Hi-pot test line affects measuring accuracy
In the time measuring test product leakage current values, Hi-pot test line also there will be leakage current in the past, affected measurement resultAccuracy.
2, adopt manpower to support test lead by insulating bar, electric shock has a big risk
Usually adopted manpower to support test lead by insulating bar, personnel get an electric shock and have a big risk in the past.
Therefore, in the urgent need to a kind of testing arrangement easy to use.
Utility model content
The technical problems to be solved in the utility model be to provide one can improve Leakage Current measuring accuracy, simple in structure andThe easy to operate experimental rig that directly measures test product leakage current and wireless output data.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: one can be to test product leakage currentCarry out the testing equipment of high-acruracy survey, its key technology is: it comprise main frame, high voltage direct current generator, Hi-pot test line,Current acquisition module, insulating supporting structure and hang on the semicircle metal hanger on the binding post on test product top;
Described Hi-pot test line upper end connects current sample module, and lower end connects high voltage direct current generator, its upper semisection byThe inner chamber of the empty cylinder of the insulation on the top of insulating supporting structure supports, lower semisection free suspension the top of insulating supporting structure absolutelyThe empty cylinder of edge below;
Described current acquisition module connects semicircle metal hanger, and the lower end of current acquisition module connects Hi-pot test line,Current acquisition module bottom is fixed on the upper end of the empty cylinder of insulation;
Described insulating supporting structure comprises the empty cylinder of the insulation on top, the insulating support in centre position and the insulating supporting of bottomBar, the empty cylinder of described insulation is supported on the sideway stance of test product by insulating support, and described insulating support rod lower end is supported in groundOn; The upper semisection of described Hi-pot test line penetrates its inner chamber through the empty cylinder lower end perforate of insulating, then after the inner chamber of the empty cylinder that insulateBe connected to current acquisition module;
The top binding post of described high voltage direct current generator connects the lower end of Hi-pot test line, at the bottom of high voltage direct current generatorPortion's AC high frequency power source input port is connected to the high frequency electric source delivery outlet of main frame by insulated conductor.
Described main frame comprises the 2nd CPU, DC pulse generator, high frequency transformer, control panel and receive data by wirelessModule; A described CPU connects respectively the corresponding port of DC pulse generator, receive data by wireless module and control panel; InstituteState the respective input of the output termination high voltage direct current generator of high frequency transformer, the input termination direct current of described high frequency transformerThe corresponding output end of high pressure generator;
The high direct voltage of described high voltage direct current generator output adds to the high-pressure side of test product through current sample module;
The earth terminal ground connection of described high voltage direct current generator.
Described current acquisition module comprises sampling resistor, wave filter, A/D converter, a CPU and wireless data transmission mouldPiece;
Described filter input end connects sampling resistor two ends, and described filter output connects the input of A/D converterEnd, the output of described A/D converter connects CPU, and the input of described wireless data transmission module is connected to the phase of a CPUAnswer output;
Described wireless data transmission module and the wireless connections of receive data by wireless module.
Described insulating supporting structure comprises the empty cylinder of the insulation on top, the insulating support in centre position and the insulating supporting of bottomBar;
The empty cylinder of described insulation is divided into upper and lower two sections of being hinged, and the top of epimere and semicircle metal hanger are reliably fixing,The epimere of the empty cylinder of the described insulation insulating support that is connected through the hinge, described insulating support is resisted against on test product, under the empty cylinder of insulationSection is hinged with insulating support rod, and described insulating support rod lower end abutment on the ground; The upper semisection menopause of described Hi-pot test lineThe lower end perforate of the empty cylinder of edge penetrates its inner chamber, then is connected to current acquisition module through the inner chamber of the empty cylinder of insulation.
The beneficial effect that adopts technique scheme to produce is:
1. the leakage current of having eliminated on Hi-pot test line affects measuring accuracy
In the time measuring test product leakage current values, microampere meter was connected to high voltage direct current generator top, because of Hi-pot test in the pastLeakage current on line, usually causes measurement result inaccurate. Now current acquisition module is directly placed in to test specimen high-pressure side, surveysCurrent value is not by wire but is uploaded to main frame by wireless mode, the current value of surveying is test specimen real currentValue, thus the accuracy of test result improved. By applying the examination that directly measures test product leakage current and wireless output dataExperiment device, leakage current testing accuracy reaches 100%. On-the-spot leakage current testing efficiency improves 50%.
2. adopt this insulating supporting structure, prevent that Field Force from getting an electric shock
Usually adopted manpower to support test lead by insulating bar, personnel get an electric shock and have a big risk in the past. Now adopt this insulationSupport structure, effectively reduces personal electric shock risk.
3. successfully solve the leakage current of heavy dirty test product under high voltage and measured problem
Under high voltage, measure heavy dirty test product leakage current, because stray electrical current is large, be difficult to ensure that detected current value is accurate. Now logicalOn overcurrent acquisition module, put, wireless data uploads, and effectively reduces the impact of stray electrical current, thereby realized under high voltage heavyReliably measuring of the leakage current of dirty test product. Adopt the utility model to avoid the leakage current on test lead to affect test resultAccuracy, reduce the electrical test personnel risk of getting an electric shock simultaneously.
Brief description of the drawings
Fig. 1 is the utility model field connection schematic diagram;
Fig. 2 is the utility model measuring principle block diagram;
Fig. 3 is the theory diagram of this current acquisition module.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is further detailed.
Referring to accompanying drawing 1-accompanying drawing 3, the present embodiment is by main frame 1, high voltage direct current generator 13, Hi-pot test line 7, current acquisitionModule 5, insulating supporting structure 31 5 part compositions, carry out test operation by the control panel 21 of main frame 1.
Described Hi-pot test line 7 upper ends connect current sample module 5, and lower end connects high voltage direct current generator 13, its firstSection is supported by the inner chamber of the empty cylinder 32 of insulation on the top of insulating supporting structure 31, and lower semisection free suspension is at insulating supporting structure 31The empty cylinder of insulation 32 belows on top;
Described current acquisition module 5 connects semicircle metal hanger 6, and lower end connects Hi-pot test line 7, and its underpart is reliably solidFix on the empty cylinder of insulation 32 upper ends on the top of insulating supporting structure 31; Semicircle metal hanger 6 can hang on connecing of test specimen 9 topsIn line terminals; The empty cylinder 32 dependence insulating supports 8 of insulation on the top of insulating supporting structure 31 are supported on the sideway stance of test specimen 9,Insulating support rod 33 lower ends in bottom are put ground and are taken ground as support; High voltage direct current generator 13 top binding posts 15 connect high pressureP-wire 7 lower ends, the high frequency electric source that AC high frequency power source input port, bottom 14 is connected to main frame 1 by special isolation wire 17 is defeatedOutlet 3.
Described main frame 1 comprises CPU18, DC pulse generator 19, high frequency transformer 20, control panel 21 and wireless dataReceiver module 22; Described CPU18 connects DC pulse generator 19, receive data by wireless module 22, control panel 21; High frequency becomesDepressor 20 connects DC pulse generator 19, high voltage direct current generator 13.
Referring to accompanying drawing 3, described current acquisition module 5 is by sampling resistor 26, wave filter 27, A/D converter 28, CPU29, nothingLine data transmission module 30 forms; Wave filter 27 inputs connect sampling resistor 26 two ends, and wave filter 27 outputs connect A/D and turnThe input of parallel operation 28, the output that connects A/D converter 28 connects CPU29, and the input of wireless data transmission module 30 connectsTo CPU29. After the high-pressure side that the high direct voltage that high voltage direct current generator 13 is exported adds to test product 25 through current sample module 5,The leakage current that test product 25 the flows through sampling resistor 26 in current sample module 5 of flowing through, as shown in Figure 3. Sampling resistor two endsThe input of sampled voltage input filter 27 carries out filtering. The sampled voltage input a/d converter 28 that wave filter 27 is exportedInput, is converted to data signal. Digital voltage signal is inputted to CPU29 calculating of converter 28, draws leakage currentAs a result, export wireless data transmission module 30 to, wireless data transmission module 30 is sent out leakage current signal by wireless modeDeliver to the receive data by wireless module 22 of main frame 1, as shown in Figure 2.
Described insulating supporting structure 31 comprises insulating support 8 and the bottom insulation in the empty cylinder 32 of the insulation on top, centre positionSupport bar 33;
Insulation empty cylinder 32 tops and the semicircle metal hanger 6 on top are reliably fixing; The insulation sky on insulating support 8 and topCylinder is 32 by the larger chain connection of resistance, the opening angle between empty 32 of the insulation on capable of regulating insulating support 8 and top; HighThe upper semisection of pressure p-wire 7 penetrates through the empty cylinder of the insulation 32 lower end perforates on top the inner chamber insulating empty 32, then through insulation skyThe inner chamber of cylinder 32 is connected to current acquisition module 5; The empty cylinder 32 of insulation on top is divided into upper and lower two sections, uses resistance between the twoLarger chain connection, the angle of bend between upper and lower two sections of capable of regulating, Hi-pot test line 7 is adopted during through above-mentioned hinge positionConnect with wire jumper.
Before test, suitably adjust the open-angle of insulating support 8 and insulating supporting structure 31 according to the umbrella skirt construction of test specimen 9Degree, can be supported on the full skirt of test specimen 9. Hold insulating supporting structure 31, make the metal hanger 6 on its top be fixed on examinationOn the binding post on product 9 tops, insulating support 8 secure support are on the full skirt of test specimen 9. Insulating supporting structure 31 times the most at lastAfter insulating support rod 33 lower ends of portion are placed in ground, can loose one's grip, be fixed by autonomous support of insulating supporting structure 31.
Referring to accompanying drawing 2, when work, the 2nd CPU18 can control DC pulse generator 19 and export the amplitude of pulse, direct current arteries and veinsThe output pulse amplitude adjusting range of rushing generator 19 is 0～200V, and frequency is 20kH. The arteries and veins that DC pulse generator 19 is exportedRush ripple and boost through high frequency transformer 20, voltage magnitude increases to original 25 times. The high-frequency alternating current that high frequency transformer 20 is exportedCirculate into the input of high voltage direct current generator 13, boost through 60 times of booster circuit rectifications of di-cap, become HVDCElectric current. DC voltage adjusting range is 0～300kV. The high direct voltage that high voltage direct current generator 13 is exported is through current sample mouldPiece 5 adds to the high-pressure side of test product 25. High voltage direct current generator 13 bottoms are support 12.
Receive data by wireless module 22 transfers to the leakage current signal of reception the CPU18 of main frame 1, finally through chain of commandPlate carries out data demonstration and printing.
High voltage direct current generator, DC pulse generator, receive data by wireless module, the wireless data mentioned are herein sent outPenetrate the modules such as module, a CPU, the 2nd CPU, high frequency transformer, wave filter, A/D converter or device tool and adopt existing marketOn conventional device.
Such as high voltage direct current generator can adopt the ZGF series high voltage direct current generator of China's day power generation;
Single-phase, three or female type wave filter that wave filter can adopt Kunshan De Feier Electronic Science and Technology Co., Ltd. to produce.The DC pulse generator that DC pulse generator can adopt Shanghai Dong Mao Electronic Science and Technology Co., Ltd. to produce. High frequency transformer canAdopt the transformer of Jieyang market day forceful electric power gas Co., Ltd production. Receive data by wireless and transmitter module can adopt Shenzhen's intelligence peaceSupporting wireless transmission and receiver module that precious Electronics Co., Ltd. produces, transmitter module as high-power in ZF-9, ZR8-J receiveModule. A/D converter can adopt likes that the AC-DC module of general electronics production or the A/D that Shenzhen lattice electron Co., Ltd produces turnParallel operation, certain above-mentioned module adopts other products good, meets instructions for use.
Described control panel 21 comprises display screen and corresponding output output equipment, or is touch-screen, or is man-machineThe mutual interface etc. of controlling, output output equipment is keyboard, mouse or button etc. The one CPU, the 2nd CPU can adopt single-chip microcomputer, as MSP430 single-chip microcomputer, or the single product machine of STC single-chip microcomputer series, its up-to-date model---STC12C5A60S2(macrocrystalline science and technologyProduce) etc., meet instructions for use.
Using method while using the present embodiment to test is as follows:
1, before test, suitably adjust opening of insulating support 8 and insulating supporting structure 31 according to the umbrella skirt construction of test specimen 9Angle, can be supported on the full skirt of test specimen 9. Hold insulating supporting structure 31, the metal hanger 6 on its top is fixed onOn the binding post on test product 9 tops, insulating support 8 secure support are on the full skirt of test specimen 9. Insulating supporting structure 31 the most at lastAfter insulating support rod 33 lower ends of bottom are placed in ground, can loose one's grip, be fixed by autonomous support of insulating supporting structure 31.
2, use grounding copper litzendraht wire to be connected to connecing of on-the-spot earth terminal and main frame 1, high voltage direct current generator 13, test product 9Between ground terminal, and confirm to connect good, reliable.
3, Hi-pot test line 7 lower ends are connected on high voltage direct current generator 13 top binding posts.
4, use special isolation wire 17 to connect the high frequency electric source delivery outlet 3 and high voltage direct current generator 13 bottoms of main frame 1AC high frequency power source input port 14.
5, open main frame 1, according to the testing standard of test specimen 9, apply high direct voltage to it. CPU18 sends out DC pulseRaw device 19 is controlled, and progressively improves DC pulse amplitude, and then passes through high frequency transformer 20, high voltage direct current generator 23 to examinationProduct 9 are progressively exerted pressure.
After the high-pressure side that the high direct voltage that high voltage direct current generator 13 is exported adds to test product 25 through current sample module 5,The leakage current that test product 25 the flows through sampling resistor 26 in current sample module 5 of flowing through, as shown in Figure 3. Sampling resistor two endsThe input of sampled voltage input filter 27 carries out filtering. The sampled voltage input a/d converter 28 that wave filter 27 is exportedInput, is converted to data signal. Digital voltage signal is inputted to CPU29 calculating of converter 28, draws leakage currentAs a result, export wireless data transmission module 30 to, as shown in Figure 3. Wireless data transmission module 30 will be leaked by wireless modeCurrent signal is sent to the receive data by wireless module 22 of main frame 1, as shown in Figure 2.
Receive data by wireless module 22 transfers to the leakage current signal of reception the CPU18 of main frame 1, finally through chain of commandPlate carries out data demonstration and printing.
The utility model overall structure is fairly simple, can on the multiple products such as arrester, promote the use of, and has following spyPoint:
(1) improve leakage current testing precision
Current acquisition module 5 is directly placed in to test specimen high-pressure side, and detected current value is not by wire but passes through nothingLine mode is uploaded to main frame, and the current value of surveying is test specimen real current value, thereby has improved the accuracy of test result.
(2) adopt this insulating supporting structure, reduce electric shock risk
Now adopt this insulating supporting structure, in leakage current testing process, electrical test personnel are without close high pressure beltElectricity position, effectively the reduction personnel risk of getting an electric shock.
(3) solve the leakage current of heavy dirty test product under high voltage and measured problem
By putting in current acquisition module 5, wireless data uploads, effectively reduce the impact of stray electrical current, thereby realizeReliably the measuring of leakage current of heavy dirty test product under high voltage.
(4) increase test data automatic analysis function
The further improvement of the utility model also can have following effect: in test process, automatically get a little, test is certainly rearMoving voltage---the current curve of drawing, significantly strengthens the network analysis ability to test data.
Voltage---the function of current curve is drawn in original creation. Measuring in leakage current process, taking certain voltage as step-length,Record current value, after having tested, test macro completes voltage automatically---and current curve is drawn. Electrical test personnel can pass throughVoltage---the timely discovering device of current curve makes moist, defects i.e.cracks. By observing voltage---the electric current song of measuring processLine, even if the data that record are not overproof, also can pass through analytical voltage---the feature of current curve, finds in time hiding establishingStandby problem.
Claims (3)
1. the testing equipment that can carry out to test product leakage current high-acruracy survey, is characterized in that: it comprise main frame (1),High voltage direct current generator (13), Hi-pot test line (7), current acquisition module (5), insulating supporting structure (31) and hang on examinationSemicircle metal hanger (6) on the binding post on product (9) top;
Described Hi-pot test line (7) upper end connects current sample module (5), and lower end connects high voltage direct current generator (13);
Described current acquisition module (5) connects semicircle metal hanger (6), and the lower end of current acquisition module (5) connects high pressure and surveysExamination line (7), current acquisition module (5) bottom is fixed on the upper end of the empty cylinder of insulation (32);
Described insulating supporting structure (31) comprises the insulating support (8) in the empty cylinder of the insulation on top (32), centre position and bottomInsulating support rod (33), the described empty cylinder of insulation (32) is supported on the sideway stance of test product (9) by insulating support (8), described exhaustedEdge support bar (33) lower end is supported on ground; The upper semisection of described Hi-pot test line (7) is through empty cylinder (32) the lower end perforate of insulatingPenetrate its inner chamber, then be connected to current acquisition module (5) after the inner chamber of the empty cylinder of insulation (32);
The top binding post (15) of described high voltage direct current generator (13) connects the lower end of Hi-pot test line (7), high direct voltageThe high frequency electric source that generator (13) AC high frequency power source input port, bottom (14) is connected to main frame (1) by insulated conductor (17) is defeatedOutlet (3).
2. a kind of testing equipment that can carry out to test product leakage current high-acruracy survey according to claim 1, its featureBe: described main frame (1) comprises control panel (21), a CPU(18), DC pulse generator (19), high frequency transformerAnd receive data by wireless module (22) (20);
Described control panel (21) and receive data by wireless module (22) meet respectively a CPU(18) respective input, described inThe one CPU(18) the input of output termination DC pulse generator (19), the output of described DC pulse generator (19)The input of termination high frequency transformer (20), high voltage direct current generator (13) described in the output termination of described high frequency transformer (20)Input port;
A described CPU(18) connect respectively DC pulse generator (19), receive data by wireless module (22) and control panel(21) corresponding port; The respective input of the output termination high voltage direct current generator (13) of described high frequency transformer (20), instituteState the corresponding output end of the input termination high voltage direct current generator (13) of high frequency transformer (20);
The high direct voltage of described high voltage direct current generator (13) output adds to the high pressure of test product (25) through current sample module (5)End;
Earth terminal (16) ground connection of described high voltage direct current generator (13).
3. a kind of testing equipment that can carry out to test product leakage current high-acruracy survey according to claim 2, its featureBe: described current acquisition module (5) comprises sampling resistor (26), wave filter (27), A/D converter (28), the 2nd CPU(29)With wireless data transmission module (30);
The respective ends of the input termination test product (9) of described sampling resistor (26), the output termination filtering of described sampling resistor (26)The input of device (27), the input of the output termination A/D converter (28) of described wave filter (27), described A/D converter(28) output termination the 2nd CPU(29) input, described the 2nd CPU(29) output termination wireless data transmission module(30); Described wireless data transmission module (30) is connected with described receive data by wireless module (22) by the mode of wireless transmissionConnect;
Described wave filter (27) input connects sampling resistor (26) two ends, and described wave filter (27) output connects A/D conversionThe input of device (28), the output of described A/D converter (28) connects CPU(29), described wireless data transmission module (30)Input be connected to a CPU(29) corresponding output end;
Described wireless data transmission module (30) and receive data by wireless module (22) wireless connections.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520674858.6U CN205246748U (en) | 2015-09-02 | 2015-09-02 | High precision measurement's test equipment can carry out examination article leakage current |
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| CN201520674858.6U CN205246748U (en) | 2015-09-02 | 2015-09-02 | High precision measurement's test equipment can carry out examination article leakage current |
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| CN205246748U true CN205246748U (en) | 2016-05-18 |
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| CN201520674858.6U Active CN205246748U (en) | 2015-09-02 | 2015-09-02 | High precision measurement's test equipment can carry out examination article leakage current |
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