CN104569801A - Characteristic test device and method for alternating-and-direct-current dual-purpose low-voltage circuit breaker - Google Patents
Characteristic test device and method for alternating-and-direct-current dual-purpose low-voltage circuit breaker Download PDFInfo
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- CN104569801A CN104569801A CN201410833890.4A CN201410833890A CN104569801A CN 104569801 A CN104569801 A CN 104569801A CN 201410833890 A CN201410833890 A CN 201410833890A CN 104569801 A CN104569801 A CN 104569801A
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Abstract
The invention provides a characteristic test device and a characteristic test method for an alternating-and-direct-current dual-purpose low-voltage circuit breaker. The device comprises the alternating current test power supply for supplying power to a low-voltage circuit breaker and a multi-magnetic-path transformer complete device, wherein the output end of the multi-magnetic-path transformer complete device is connected with an alternating current circuit breaker test bed and a direct current circuit breaker test bed respectively through an alternating-and-direct-current test circuit selection switch; the alternating current circuit breaker test bed and the direct current circuit breaker test bed are respectively connected with a data acquisition unit and a programmable controller PLC through an electric quantity transducer; the output end of the PLC is connected with the multi-magnetic-path transformer complete device to control the voltage level of a current source. The device disclosed by the invention is used for detecting the characteristic of the low-voltage circuit breaker, and the characteristic test detection on the alternating current or direct current circuit breaker can be reliably and efficiently finished.
Description
[technical field]
The invention belongs to low-voltage circuit breaker detection technique field, particularly a kind of circuit breaker characteristic detects, and especially detects the action current of low-voltage circuit breaker and actuation time.
[background technology]
Isolating switch is visual plant indispensable in Low Voltage Electrical Apparatus, and its action current and actuation time are two leading indicators of isolating switch.The definite value of isolating switch is mainly by regulating tension spring and adjustable potentiometer.Isolating switch is due to reasons such as working time, vibrations, repairings, and its definite value often changes, and easily causes protection or misoperation, causes electrical malfunction expanded range or equipment normally not to run.Therefore, develop large circuit breaker characteristic testing equipment, regular inspection and checking are done to some characterisitic parameters of isolating switch, to guarantee sensitivity and the reliability of its work, there is important practical significance.Low-voltage circuit breaker testing table is exactly for completing circuit breaker characteristic to adjust and the test unit designed.Because its test current is large, and need the motion detection for AC circuit breaker and DC circuit breaker, so the difficult design of its test unit.
Early stage conventional Technologies for AC Low Voltage Circuit Breakers acting characteristic testing table many employings induction voltage regulator is combined with low voltage heavy current transformer, i.e. alternating current → induction voltage regulator → low voltage heavy current transformer → test isolating switch.This pattern has three defects: (1) requires that surge capacity is enough large, causes equipment volume huge; (2) owing to requiring the capacity of pressure regulator large, can only induction voltage regulator be selected, and induction voltage regulator to make waveform distortion high; (3) test current is wayward, and test error is large.Low-voltage direct breaker operating characteristic testing table then more adopts DC generation unit, utilizes AC power to coordinate with genset to realize electric current to export, and its advantage is that power supply ripple coefficient is little, quality better; Shortcoming is that unit volume is huge, and equipment is easy care not, and cost is high, runs noise large.Conventional AC circuit breaker and DC circuit breaker attribute testing platform theory structure are as shown in Figure 1.1 is AC power, for the power supply of whole testing table inputs, 2 is induction voltage regulator, 3 is low voltage heavy current transformer, in ac test platform with induction voltage regulator 2 with the use of the output realizing AC great current, 4 is ac test isolating switch, and 5 is DC generation unit, for DC characteristic test isolating switch provides DC current, 6 is DC experiment isolating switch.
[summary of the invention]
The object of the present invention is to provide a kind of AC/DC low-voltage circuit breaker characteristic test apparatus and method, complete action current and inspection actuation time of low-voltage circuit breaker accurately and reliably.
The object of the invention is to solve by the following technical programs:
A kind of AC/DC low-voltage circuit breaker characteristic test apparatus, comprise for low-voltage circuit breaker provides AC-testing supply and the multiple magnetic circuit transformer complete equipment of power supply, the output terminal of described multiple magnetic circuit transformer complete equipment is connected with AC circuit breaker attribute testing platform and DC circuit breaker attribute testing platform respectively by alternating current-direct current test loop selector switch, described AC circuit breaker attribute testing platform is connected with data acquisition unit and programmable controller PLC by electric parameters transducer respectively with DC circuit breaker attribute testing platform, the output terminal of described programmable controller PLC is connected the electric pressure to control current source with multiple magnetic circuit transformer complete equipment.
Described AC-testing supply is connected to prevent from shoving with multiple magnetic circuit transformer complete equipment by option closing switch.
Described multiple magnetic circuit transformer complete equipment at least comprise the multipath magnetic circuit conversion equipment for voltage coarse adjustment and the three-phase automatic coupling voltage regulator for voltage fine, and described programmable controller PLC is connected with multipath magnetic circuit conversion equipment and three-phase automatic coupling voltage regulator respectively.
Described multiple magnetic circuit transformer complete equipment at least comprise the multipath magnetic circuit conversion equipment for voltage coarse adjustment and the three-phase automatic coupling voltage regulator for voltage fine, described programmable controller PLC respectively with multipath magnetic circuit conversion equipment, three-phase automatic coupling voltage regulator, and option closing switch connect.
Described alternating current-direct current test loop selector switch is connected with DC circuit breaker attribute testing platform with shunt by fairing successively.
Described data acquisition unit adopts PCI-1716L high-speed data acquisition card, himself is with 16 A/D converters, 16 road single-ended analog amount inputs or 8 road difference analogue amount inputs are provided, simultaneously with 2 16 D/A output channels, 16 bit digital quantity I/O passages and 1 16 digit counter passage.
A kind of AC/DC low-voltage circuit breaker characteristic test method, first PLC is according to the requirement determination electric pressure exported, multiple magnetic circuit transformer complete equipment are issued in the instruction of this electric pressure, then, after connecting AC-testing supply, the voltage that AC-testing supply provides is converted into the electric pressure of specifying at multiple magnetic circuit transformer complete equipment and exports, alternating current-direct current test loop selector switch is switched to corresponding pilot system according to the type of test, then Output rusults is transferred to programmable controller PLC by electric parameters transducer, programmable controller PLC contrasts according to the Output rusults of the numerical value preset and collection, if inconsistent with the numerical value preset, then send instruction to regulate voltage until preset value is consistent with collection value to multiple magnetic circuit transformer complete equipment.
AC-testing supply is first through option closing switch and then be supplied to multiple magnetic circuit transformer complete equipment, and described option closing switch only carries out feed motion when the zero crossing of alternating voltage, voltage is supplied to multiple magnetic circuit transformer complete equipment.
Described multiple magnetic circuit transformer complete equipment at least comprise the multipath magnetic circuit conversion equipment for voltage coarse adjustment and the three-phase automatic coupling voltage regulator for voltage fine, the type determination coarse tuning voltage of described programmable controller PLC according to test product or the combination of fine tuning voltage or coarse tuning voltage and fine tuning voltage, to ensure the output of current stabilization.
Compared with prior art, the present invention at least has following beneficial effect: apparatus of the present invention current source includes multiple magnetic circuit transformer complete equipment, and the capacity of such pressure regulator significantly reduces, and the volume of pressure regulator reduces greatly; Because the capacity of pressure regulator significantly reduces, therefore, can adopt automatic coupling voltage regulator, the waveform distortion that trial voltage is exported reduces greatly.In addition, apparatus of the present invention adopt a kind of current source can realize AC and DC two kinds test.
[accompanying drawing explanation]
Fig. 1 is existing ac/dc circuit breaker characteristic testing table schematic diagram;
Fig. 2 is AC/DC low-voltage circuit breaker characteristic test apparatus schematic diagram of the present invention.
In figure: 1 is AC-testing supply, 2 is induction voltage regulator, 3 is low voltage heavy current transformer, 4 is ac test isolating switch, 5 is DC generation unit, 6 is DC experiment isolating switch, 7 is phase selection switch, 8 is multipath magnetic circuit conversion equipment, 9 is three-phase multiple magnetic circuit transformer, 10 is industrial computer, 11 is programmable controller PLC, 12 is three-phase automatic coupling voltage regulator, 13 is alternating current-direct current test loop selector switch, 14 is fairing, 15 is shunt, 16 is AC circuit breaker attribute testing platform, 17 is DC circuit breaker attribute testing platform, 18 is electric parameters transducer, 19 is data acquisition system (DAS), 20 is voltameter, 21 is controlling test power supply.
[embodiment]
Below in conjunction with accompanying drawing, 2 couples of the present invention are described in further detail:
Present stage, multiple magnetic circuit transformer technology was rapidly developed, PLC control technology is ripe, the acting characteristic of low-voltage circuit breaker is tested with multiple magnetic circuit transformer complete equipment as power supply core controls, adopt the method for distribute control to carry out centralized control at industrial computer by PLC, be equipped with automatic coupling voltage regulator to realize automatic steady current function.This type of test model has the following advantages: (1) adopts multiple magnetic circuit transformer complete equipment, and the capacity of pressure regulator is significantly reduced, and the volume of pressure regulator reduces greatly; (2) due to the reduction of surge capacity, can select to adopt automatic coupling voltage regulator, make trial voltage output waveform degree of distortion little; (3) adopt this test model, automatic coupling voltage regulator role is only equivalent to fine tuning, and multiple magnetic circuit transformer and multipole transformer input at different levels are equivalent to coarse adjustment, and make test current be easy to control, precision of steady current is higher.Carry out combined floodgate Angle ambiguity at mains input side by phase selection switch, reduce the component of dash current when wink dynamic test, improve the accuracy of result.In conjunction with the use of alternating current-direct current test loop selector switch, can dual-use be realized, complete the Characteristics Detection of dissimilar isolating switch.
See Fig. 2, AC/DC low-voltage circuit breaker characteristic test apparatus of the present invention, comprise AC-testing supply 1, multiple magnetic circuit transformer complete equipment, alternating current-direct current test loop selector switch 13, different test loops is selected by this switch, circuit breaker characteristic testing table is used for carrying out the attribute testing of dissimilar isolating switch respectively, the data that electric parameters transducer 18 gathers are uploaded by cable by data acquisition system (DAS) 19, these data send into industrial computer 10 and the programmable controller PLC 11 of experiment control system respectively, another road is directly sent into voltameter 20 and is realized real-time display.Described multiple magnetic circuit transformer complete equipment are primarily of multipath magnetic circuit conversion equipment 8, and three-phase automatic coupling voltage regulator 12 and three-phase multiple magnetic circuit transformer 9 form.，
Concrete annexation of the present invention is as follows:
When carrying out AC circuit breaker attribute testing, in test loop, induction reactance is on the impact of cranking test, phase selection switch 7 pairs of AC-testing supplies are selected to carry out the combined floodgate of about 90 °, reduce dash current component in test loop, close a floodgate time first utilize phase selecting switching-on apparatus with voltage transformer (VT) carry out voltage sample, when voltage over zero, according to programmable controller PLC 11 the order sent out close a floodgate, programmable controller PLC 11 carries out program setting by industrial computer 10, and the control power supply needed for industrial computer 10 is provided by controlling test power supply 21.This phase selection switch 7 export cable be connected to multipath magnetic circuit conversion equipment 8 realize different voltage export to change different output current values, this multipath magnetic circuit conversion equipment 8 is furnished with multistage transformer, automatically adjusted by the prospective current instruction receiving programmable controller PLC 11, realize the selection of different magnetic circuit, realize the coarse adjustment of electric current range of choice, realize electric current through three-phase multiple magnetic circuit transformer 9 to export, alternating current-direct current test loop selector switch 13 is chosen as ac test, this electric current is directly sent in AC circuit breaker attribute testing platform 16, this attribute testing platform connects test product, the relevant information of electric current is gathered by electric parameters transducer 18, this Information Monitoring exports respectively by three tunnels, wherein a road current value is directly presented in the gauge outfit of device by voltameter 20, one road is delivered to programmable controller PLC 11 and is sampled, to be tracing property model send into industrial computer 10 through data acquisition system (DAS) 19 on another road carries out waveform display and analyzes.Usb communication is adopted between industrial computer 10 and programmable controller PLC 11.Data acquisition system (DAS) 19 adopts PCI-1716L high-speed data acquisition card to sample, it is with 16 A/D converters, 16 road single-ended analog amount inputs or 8 road difference analogue amount inputs can be provided, also can combinatorial input, simultaneously with 2 16 D/A output channels, 16 bit digital quantity I/O passages and 1 16 digit counter passage.Analysis and control software has been write in industrial computer 10, software adopts VC++6.0 programming, realize data acquisition, store and show with waveform, and carry out interactive communication with programmable controller PLC 12, software utilizes interrupt techniques to realize sampling in turn fast of data, with easily can Parameters variation in data Collection & Processing System in real-time monitored process of the test, better collection waveform is analyzed accurately, design and develop in process at this system program, Analysis ACT serial communications control.ACT series of controls carries out data communication based on the MELSEC communications protocol of MITSUBISHI company independent development.Industrial computer 10 can read/write PLC soft element data and sequence program by ACT control, also can monitor the equipment state of programmable controller PLC 11 simultaneously, the real-time current gathered constantly is analyzed, programmable controller PLC 11 compares according to the real-time current of preset value and collection and automatically regulates three-phase automatic coupling voltage regulator 12, realize the fine tuning that electric current exports, to reach the effect of current stabilization.
When carrying out DC circuit breaker attribute testing, both work structuring are similar, alternating current-direct current test loop selector switch 13 is chosen as DC experiment, access fairing 14 accordingly, realize alterating and direct current stream translation, gather correlated current signal by shunt 15, this electric current is directly sent in DC circuit breaker attribute testing platform 17 by cable, this attribute testing platform connects test product, gathers correlated current information by electric parameters transducer 18, and the latter is with to exchange control principle similar.
In sum, AC/DC low-voltage circuit breaker characteristic test apparatus of the present invention processes from power supply input, the impact component in loop is reduced by the use of phase selection switch, realize dual-use in conjunction with alternating current-direct current test loop selector switch simultaneously, core controls to adopt industrial computer and Programmable Logic Controller, the data reported in conjunction with data acquisition system (DAS) realize the automatic control of test loop, test current information can show in real time, industrial computer display test findings and waveform, simple to operate easy-to-use, alleviate the working strength of testing crew, improve test efficiency, the passive maintenance of low-voltage circuit breaker is made to change initiatively maintenance into, ensure that isolating switch can steady operation for a long time.Isolating switch after testing equipment verification, the safe tool that greatly can improve consumer and electric system is of great significance.
This patent is for the characteristic of low-voltage circuit breaker, and its current parameters can reach 40kA, meets most isolating switch on market.
The present invention has following beneficial effect:
1) adopt phase selection switch, the aperiodic component in the elimination test electric current maximum when wink dynamic test, reduce dash current component.
2) adopt multiple magnetic circuit transformer as power supply, reduce the capacity of pressure regulator, realize the high precision control that electric current exports.
3) by the use of alternating current-direct current test loop selector switch, the dual-use of attribute testing platform can be realized easily, expand its practicality.
4) the present invention adopt industrial computer and programmable controller PLC with the use of, realize controlling, with the integral application measured, to improve test efficiency.
Claims (9)
1. an AC/DC low-voltage circuit breaker characteristic test apparatus, it is characterized in that: comprise for low-voltage circuit breaker provides AC-testing supply and the multiple magnetic circuit transformer complete equipment of power supply, the output terminal of described multiple magnetic circuit transformer complete equipment is connected with AC circuit breaker attribute testing platform and DC circuit breaker attribute testing platform respectively by alternating current-direct current test loop selector switch, described AC circuit breaker attribute testing platform is connected with data acquisition unit and programmable controller PLC by electric parameters transducer respectively with DC circuit breaker attribute testing platform, the output terminal of described programmable controller PLC is connected the electric pressure to control current source with multiple magnetic circuit transformer complete equipment.
2. AC/DC low-voltage circuit breaker characteristic test apparatus according to claim 1, is characterized in that: described AC power is connected to prevent from shoving with multiple magnetic circuit transformer complete equipment by option closing switch.
3. AC/DC low-voltage circuit breaker characteristic test apparatus according to claim 1, it is characterized in that: described multiple magnetic circuit transformer complete equipment at least comprise the multipath magnetic circuit conversion equipment for voltage coarse adjustment and the three-phase automatic coupling voltage regulator for voltage fine, and described programmable controller PLC is connected with multipath magnetic circuit conversion equipment and three-phase automatic coupling voltage regulator respectively.
4. AC/DC low-voltage circuit breaker characteristic test apparatus according to claim 2, it is characterized in that: described multiple magnetic circuit transformer complete equipment at least comprise the multipath magnetic circuit conversion equipment for voltage coarse adjustment and the three-phase automatic coupling voltage regulator for voltage fine, described programmable controller PLC respectively with multipath magnetic circuit conversion equipment, three-phase automatic coupling voltage regulator, and option closing switch connect.
5. AC/DC low-voltage circuit breaker characteristic test apparatus according to claim 1, is characterized in that: described alternating current-direct current test loop selector switch is connected with DC circuit breaker attribute testing platform with shunt by fairing successively.
6. AC/DC low-voltage circuit breaker characteristic test apparatus according to claim 1, it is characterized in that: described data acquisition unit adopts PCI-1716L high-speed data acquisition card, himself is with 16 A/D converters, 16 road single-ended analog amount inputs or 8 road difference analogue amount inputs are provided, simultaneously with 2 16 D/A output channels, 16 bit digital quantity I/O passages and 1 16 digit counter passage.
7. the AC/DC low-voltage circuit breaker characteristic test method based on device described in any one in claim 1 to 6, it is characterized in that: first PLC is according to the requirement determination electric pressure exported, multiple magnetic circuit transformer complete equipment are issued in the instruction of this electric pressure, then, after connecting AC-testing supply, the voltage that AC-testing supply provides is converted into the electric pressure of specifying at multiple magnetic circuit transformer complete equipment and exports, alternating current-direct current test loop selector switch is switched to corresponding pilot system according to the type of test, then Output rusults is transferred to programmable controller PLC by electric parameters transducer, programmable controller PLC contrasts according to the Output rusults of the numerical value preset and collection, if inconsistent with the numerical value preset, then send instruction to regulate voltage until preset value is consistent with collection value to multiple magnetic circuit transformer complete equipment.
8. method according to claim 7, it is characterized in that: AC-testing supply is first through option closing switch and then be supplied to multiple magnetic circuit transformer complete equipment, described option closing switch only carries out feed motion when the zero crossing of alternating voltage, voltage is supplied to multiple magnetic circuit transformer complete equipment.
9. method according to claim 7, it is characterized in that: described multiple magnetic circuit transformer complete equipment at least comprise the multipath magnetic circuit conversion equipment for voltage coarse adjustment and the three-phase automatic coupling voltage regulator for voltage fine, the type determination coarse tuning voltage of described programmable controller PLC according to test product or the combination of fine tuning voltage or coarse tuning voltage and fine tuning voltage, to ensure the output of current stabilization.
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| CN201410833890.4A CN104569801A (en) | 2014-12-27 | 2014-12-27 | Characteristic test device and method for alternating-and-direct-current dual-purpose low-voltage circuit breaker |
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| CN201410833890.4A CN104569801A (en) | 2014-12-27 | 2014-12-27 | Characteristic test device and method for alternating-and-direct-current dual-purpose low-voltage circuit breaker |
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Cited By (5)
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| CN105629162A (en) * | 2016-01-06 | 2016-06-01 | 中车南京浦镇车辆有限公司 | Method for predicting failure rate of rail vehicle breaker |
| CN110133414A (en) * | 2019-06-05 | 2019-08-16 | 厦门立林电气控制技术有限公司 | A kind of test machine of magnetictrip |
| CN110988670A (en) * | 2019-12-27 | 2020-04-10 | 中国人民解放军海军潜艇学院 | Heavy current generating device and device for circuit breaker calibration |
| CN113533873A (en) * | 2020-04-21 | 2021-10-22 | 株洲中车时代电气股份有限公司 | Testing device and method for cable temperature rise test |
| WO2022095407A1 (en) * | 2020-11-05 | 2022-05-12 | 广安电气检测中心(广东)有限公司 | Multifunctional power processing apparatus for experiments, and connector experimental testing apparatus |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105629162A (en) * | 2016-01-06 | 2016-06-01 | 中车南京浦镇车辆有限公司 | Method for predicting failure rate of rail vehicle breaker |
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| CN110988670B (en) * | 2019-12-27 | 2022-05-10 | 中国人民解放军海军潜艇学院 | Heavy current generating device and device for checking circuit breaker |
| CN113533873A (en) * | 2020-04-21 | 2021-10-22 | 株洲中车时代电气股份有限公司 | Testing device and method for cable temperature rise test |
| WO2022095407A1 (en) * | 2020-11-05 | 2022-05-12 | 广安电气检测中心(广东)有限公司 | Multifunctional power processing apparatus for experiments, and connector experimental testing apparatus |
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