CN205246826U - Circuit breaker short circuit ability test circuit - Google Patents
Circuit breaker short circuit ability test circuit Download PDFInfo
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- CN205246826U CN205246826U CN201521062767.3U CN201521062767U CN205246826U CN 205246826 U CN205246826 U CN 205246826U CN 201521062767 U CN201521062767 U CN 201521062767U CN 205246826 U CN205246826 U CN 205246826U
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Abstract
The utility model provides a circuit breaker short circuit ability test circuit, its low cost maintains simple and conveniently, can satisfy test requirement completely. It selects looks switching -on device including the alternating current power supply who establishes ties in proper order, experimental station and ground system to and the parallelly connected circuit breaker parallelly connected with selecting looks switching -on device, experimental station is used for inserting the examination article, the looks switching -on device that selects select looks switch body including establishing ties in test circuit to and the selection that connects gradually be harmonious brake controller and PC control system, select looks switch body by three phase compositions, each is formed by three vacuum contactor is parallelly connected, and the output that selects the brake controller that is harmonious is connected to vacuum contactor's the subcontrol terminal that closes, select the brake controller that is harmonious to be used for control to select closing the separating brake moment of looks switch body, the PC control system is used for setting up the test parameter.
Description
Technical field
The utility model relates to low-voltage circuit breaker short circuit current detection technique field, is specially a kind of breakerShort-circuit capacity test loop.
Background technology
AC circuit breaker is visual plant indispensable in Low Voltage Electrical Apparatus, and its short-circuit capability is mainAn index. In the practical application of low-voltage circuit breaker, short-circuit conditions ubiquity, if breakerThe short-circuit capacity that can not meet nominal under certain short circuit condition, likely jeopardizes whole circuit alsoCause serious consequence. Therefore, the short-circuit capability of breaker is tested, to guarantee the spirit of its workQuick property and reliability, have important practical significance. The examination standard standard of short-circuit capability have one importantParameter need pay close attention to, i.e. synchronism in short-circuit process test, in order to meet this requirement, needs to useTo phase selecting switching-on apparatus.
Present stage, conventional phase selecting switching-on apparatus adopted different structures according to different current parameters, conventionallyIn situation, adopt Switch main body and test in conjunction with phase-controlled device, Switch main body adopts vacuum extinction conventionallyThe Linear transmission mode of permanent-magnet operating mechanism is joined in chamber, progressively adopts IGCT control at present according to the development of technologyTechnology processed. These phase selecting switching-on apparatus have advantages of very large in application, and electric current coverage is wider,But Low Voltage Electrical Apparatus present stage is detected the long and larger family expenses AC circuit breaker of detection limit consuming time, shouldThe short circuit current of type breaker generally can not exceed 15kA, and detects required synchroswitching phase angle classType is more. If there is following defect with above-mentioned phase selecting switching-on apparatus: (1) is because of closing phase angle classType is more, in order to improve test efficiency, thus require phase selecting switching-on apparatus frequently to use, for switch originallyBody is a test; (2) above-mentioned phase selecting switching-on apparatus complex structure, maintenance trouble, and control mode needsBe equipped with control box special; (3) overload capacity is not strong, conventionally with the Switch main body that bears large short circuit currentCarry out low current test, operation frequently, reduces Switch main body service life; (4) with high costs, rightIn this type of low current test, consider the efficiency-cost ratio of actual tests, cause waste, improve operating cost.
In order to address the above problem targetedly, this patent is in conjunction with testing standard and common test parametersRequirement, has designed novel phase selecting switching-on apparatus in conjunction with the control technology of present stage, and its current parameters canReach 15kA, and with low cost, convenience easy to maintenance, meets family expenses conventional on present market completelyThe short-circuit test requirement of low-voltage circuit breaker.
Utility model content
For problems of the prior art, the utility model provides a kind of circuit breaker short circuit ability testLoop, it is with low cost, and convenience easy to maintenance can meet test requirements document completely.
The utility model is to be achieved through the following technical solutions:
A kind of circuit breaker short circuit ability test loop, comprises the AC power of series connection successively, phase selection dressPut test station and earthed system, and the in parallel breaker in parallel with phase selecting switching-on apparatus; Test workPosition is used for accessing test product; Described phase selecting switching-on apparatus comprises the phase-selecting switch basis being connected in test loopBody, and the phase selection controller and the upper computer control system that connect successively; Phase-selecting switch body is by threePhase composition, each is composed in parallel by three vacuum contactors, and a connecting terminals is controlled in closing point of vacuum contactorThe output of selecting phase switching-on controller; Phase selection controller is for controlling closing point of phase-selecting switch bodyThe lock moment; Upper computer control system is used for arranging test parameters.
Preferably, between AC power and phase selecting switching-on apparatus, also series connection is provided with prime impedance and protects disconnectedRoad device; Prime impedance is used to test loop to provide and regulates the impedance of test current to specified short-circuit capacity.
Preferably, between test station and earthed system, also series connection is provided with rear class impedance; Rear class impedance is usedRegulate test current to the impedance lower than specified short-circuit capacity in providing for test loop.
Preferably, the voltage detecting that the input of phase selection controller accesses test loop by optocoupler is defeatedEnter signal.
Preferably, phase selection controller adopts single-chip microcomputer or microprocessor.
Preferably, phase selection controller adopts 8 of the low-power consumption of the AVRRISC structure based on strengtheningCMOS microcontroller.
Compared with prior art, the utlity model has following useful technique effect:
The utility model can complete the inspection of low-voltage circuit breaker short-circuit capability accurately and reliably, meets test and wantsAsk, reduce experimentation cost, by phase selecting switching-on apparatus in low-voltage circuit breaker short-circuit capability test with vacuumContactor is phase-selecting switch body completes phase selection controller design in conjunction with single-chip microcomputer, coordinates outside increasingThe testing transformer that adds respective volume carries out this test, makes its test loop have following advantage:(1) according to test parameters requirement, adopt three vacuum contactors to compose in parallel a phase, nine vacuum connectTentaculum composition three-phase, vacuum contactor is simple in structure, and electric life number of times is high, and overload capacity is strong, reliabilityHeight, mechanical life and electric life are often; (2) adopt single-chip microcomputer or microprocessor to carry out phase-controlled deviceDesign, single-chip microcomputer Applicative time is long, programming is simple, principle is simple, extended capability is strong, reliabilityHeight, by with the combination of upper computer control system, easy to operate easy-to-use; (3) cost is low, single unit systemVolume is little, and parameter regulates simple, meets the requirement of frequent test, has improved test efficiency, has very strongPracticality. The circuit breaker short circuit ability that is specially adapted to exchange detects, especially family expenses and similar applicationsLow-voltage circuit breaker short circuit curve detect.
Brief description of the drawings
Fig. 1 is the structural representation of the short-circuit capacity test loop described in the utility model.
Fig. 2 is the structure principle chart that in the utility model, phase selecting switching-on apparatus adopts vacuum contactor.
In figure: 1 is AC power, 2 is prime impedance, and 3 is protective breaker, and 4 is phase selection dressPut, 5 is breaker in parallel, and 6 is test station, and 7 is rear class impedance, 8 test loop earthed systems,9 is end of incoming cables, and 10 is vacuum contactor, and 11 is test loop voltage detecting input signal, and 12 is choosingPhase switching-on controller, 13 is upper computer control system, 14 is phase-selecting switch body.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail, described in be to the utility modelExplanation instead of restriction.
As shown in Figure 1, being included as short-circuit test provides the AC power of power supply in loop described in the utility model1, for providing, test regulates the prime impedance 2 of electric current to specified short-circuit capacity, protective breaker 3, phase selectionClosing device 4, coordinates phase selecting switching-on apparatus 4 to realize the breaker in parallel of different short-circuit test types5, access the test station 6 of required test product, regulate test current to lower than after specified short-circuit capacityLevel impedance 7, test loop earthed system 8, the end of incoming cables 9 of phase selecting switching-on apparatus 4, composition phase selection is closedThe vacuum contactor 10 of brake gear 4, test loop voltage detecting input signal 11, phase selection controlDevice 12 and upper computer control system 13.
With the utility model in the time carrying out short-circuit test, by regulating prime impedance 2 and rear class impedance 7Parameter, realizes adjusting of required short circuit current, and AC power 1, will by the combined floodgate of protective breaker 3Test voltage is delivered to the phase-selecting switch body 14 of phase selecting switching-on apparatus 4 and the front end of breaker in parallel 5,Test loop voltage detecting input signal 11 is fed through this voltage signal in phase selection controller 12,Phase selection controller 12 adopts 8 CMOS of low-power consumption of the AVRRISC structure based on strengthening micro-Controller, is furnished with corresponding adjunct circuit, first by optocoupler, by test loop voltage detecting input letterNumbers 11 carry out half-wave is processed into direct current signal, be input in CMOS microcontroller, at each half-waveStart, controller forms hardware interrupts by rising edge, so that find voltage over zero, is searching outAfter point of zero voltage, between twice voltage over zero, CMOS microcontroller sends high-speed pulse, passes throughPhase selection controller 12 internal counters record the number of pulses between twice zero crossing, same in order to ensureStep property, the number of pulses between every twice voltage over zero is arranged on 20,000, and every degree is 55 arteries and veinsRush unit. Then according to test requirements document, in upper computer control system 13, set test parameters requiredSynchronous angle, this angle is delivered in phase selection controller 12 by Modbus agreement, elected being harmoniousBrake controller 12 receives after angle preset value, and microprocessor can be by the relation of process angle and pulseSelect trigger timing. Such as selecting 90 degree, microcontroller can send 5000 after voltage over zeroIndividual pulse output, for controlling the on/off switch of Switch main body 4 of phase selecting switching-on apparatus. Phase-selecting switch body4 are made up of three groups of vacuum contactors 10, and each group vacuum contactor comprises three vacuum contacts in parallelDevice, in the time of the on/off switch moment of gauge tap body, first measures the intrinsic of every group of vacuum contactor 10Actuation time, and this value record is got off, input preset angles value in upper computer control system 13 timeTaken into account intrinsic actuation time, and in the time closing a floodgate, phase selection controller 12 is by true in conjunction with every groupThe intrinsic closing time of empty contactor is exported respectively three road signals and is delivered in three groups of vacuum contactors 10, usesIn the time of adjusting switching signal, to realize the three-phase equilibrium of circuit. According to testing standard requirement,When short-circuit test, there is different action types, connecing such as the short-circuit tests different or that have of operating sequenceWhen logical, do not need synchronously, therefore by the Switch main body 4 of phase selecting switching-on apparatus and joining of breaker in parallel 5Close use, to meet different test requirements documents.
In a kind of circuit breaker short circuit ability test of the utility model loop, as shown in Figure 2, phase selection dressPut is by phase-selecting switch body 14, phase selection controller 12 and upper computer control system 13 3 partsComposition. Phase-selecting switch body 14 accesses in short-circuit test loop, and phase-selecting switch body 14 is by three-phase groupBecome, to meet three-phase product testing, each is composed in parallel by three vacuum contactors, vacuum contactorClose a point control terminal access phase selection controller. Phase selection controller 12 adopts single-chip microcomputer or micro-Processor, as core, is connected with upper computer control system by communications protocol. Upper computer control system13 comprise man-machine interactive system, for setting test parameters.
Voltage detecting input signal 11 acquisition test line voltage distributions in test loop are also sent into phase selection controlDevice 12, after judging by phase selection controller 12 for controlling closing of phase-selecting switch body 14In the separating brake moment, upper computer control system 13 can be carried out the setting of test parameters, and data will be set pass throughAgreement is fed through in phase selection controller 12, completes the synchronous angle of on/off switch that test parameters requires.
In sum, the phase selecting switching-on apparatus 4 that employing contactor of the present utility model is realized, opens in phase selectionClose body 14 places and adopt three vacuum contactors to compose in parallel a use mutually, each can be born mutuallyLarger short circuit current, makes full use of the strong feature of overload performance of vacuum contactor, has realized short circuit electricityThe combined floodgate of stream, in conjunction with vacuum contactor electric life advantage often, is applied to family expenses and class by its settingLike in the short-circuit test of purposes breaker, it is core that phase selection controller 12 adopts microprocessor, knotClose circuit for checking input signals and judge the moment of voltage, according to the angle requirement of upper computer control system,Export respectively different trigger impulses and realize phase-selecting switch body 14 different alternate actuation times, protectDemonstrate,prove synchronous accuracy and the balance of three-phase current. This device project organization is simple, utilizes PC controlSystem 13 completes the required synchronization point setting of test requirements document easily, and operation lifetime is long, maintenance sideJust, improved the short-circuit test efficiency of family expenses and similar applications breaker.
Claims (6)
1. a circuit breaker short circuit ability test loop, is characterized in that, comprises the alternating current of series connection successivelySource (1), phase selecting switching-on apparatus (4), test station (6) and earthed system (8), and and phase selectionThe breaker in parallel (5) that closing device (4) is in parallel; Test station (6) is for accessing test product;
Described phase selecting switching-on apparatus (4) comprises the phase-selecting switch body being connected in test loop(14) the phase selection controller (12) and the upper computer control system (13) that, and successively connect; ChoosingPhase Switch main body (14) is by three phase compositions, and each is composed in parallel by three vacuum contactors (10),Vacuum contactor (10) close point an output of controlling connecting terminals selecting phase switching-on controller (12); ChoosingPhase switching-on controller (12) is for controlling the on/off switch moment of phase-selecting switch body (14); Host computer controlSystem processed (13) is for arranging test parameters.
2. a kind of circuit breaker short circuit ability test according to claim 1 loop, is characterized in that,Between AC power (1) and phase selecting switching-on apparatus (4), also series connection is provided with prime impedance (2) and protectsProtect breaker (3); Prime impedance (2) is used to test loop to provide adjusting test current to specified shortThe impedance of road ability.
3. a kind of circuit breaker short circuit ability test according to claim 1 loop, is characterized in that,Between test station (6) and earthed system (8), also series connection is provided with rear class impedance (7); Rear class impedance(7) being used to test loop to provide regulates test current to the impedance lower than specified short-circuit capacity.
4. a kind of circuit breaker short circuit ability test according to claim 1 loop, is characterized in that,The input of phase selection controller (12) accesses the voltage detecting input signal of test loop by optocoupler(11)。
5. a kind of circuit breaker short circuit ability test according to claim 1 loop, is characterized in that,Phase selection controller (12) adopts single-chip microcomputer or microprocessor.
6. a kind of circuit breaker short circuit ability test according to claim 1 loop, is characterized in that,Phase selection controller (12) adopts 8 CMOS of low-power consumption of the AVRRISC structure based on strengtheningMicrocontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521062767.3U CN205246826U (en) | 2015-12-17 | 2015-12-17 | Circuit breaker short circuit ability test circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521062767.3U CN205246826U (en) | 2015-12-17 | 2015-12-17 | Circuit breaker short circuit ability test circuit |
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| CN205246826U true CN205246826U (en) | 2016-05-18 |
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| CN201521062767.3U Active CN205246826U (en) | 2015-12-17 | 2015-12-17 | Circuit breaker short circuit ability test circuit |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179465A (en) * | 2017-07-26 | 2017-09-19 | 国家电网公司 | Extra-high voltage direct-current phase selecting switching-on apparatus performance and secondary circuit site test method |
| CN108363001A (en) * | 2018-01-29 | 2018-08-03 | 温州大学 | A kind of low-voltage circuit breaker short-circuit test system and its impedance self-adaptive bearing calibration |
| CN109541339A (en) * | 2018-10-26 | 2019-03-29 | 苏州华电电气股份有限公司 | Power transformer bears short-circuit capacity pilot system |
| CN111190358A (en) * | 2020-02-26 | 2020-05-22 | 国网河南省电力公司电力科学研究院 | A 10kV closing angle control system and precise control method |
| CN111751718A (en) * | 2020-05-20 | 2020-10-09 | 中国电力科学研究院有限公司 | A power electronic phase selection system and its phase selection method |
| CN113391198A (en) * | 2021-05-24 | 2021-09-14 | 浙江方圆电气设备检测有限公司 | Magnetic latching relay rated short circuit connection capacity test device and test method thereof |
| CN114355180A (en) * | 2021-11-26 | 2022-04-15 | 中机国际（西安）技术发展有限公司 | A power supply system and method for generating delayed zero-crossing test current |
| 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 |
| CN117791483A (en) * | 2024-02-27 | 2024-03-29 | 西安高压电器研究院股份有限公司 | Automatic setting method and system for capacity test time sequence |
-
2015
- 2015-12-17 CN CN201521062767.3U patent/CN205246826U/en active Active
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107179465A (en) * | 2017-07-26 | 2017-09-19 | 国家电网公司 | Extra-high voltage direct-current phase selecting switching-on apparatus performance and secondary circuit site test method |
| CN107179465B (en) * | 2017-07-26 | 2020-03-17 | 国家电网公司 | Extra-high voltage direct current phase selection closing device performance and secondary circuit field test method |
| CN108363001A (en) * | 2018-01-29 | 2018-08-03 | 温州大学 | A kind of low-voltage circuit breaker short-circuit test system and its impedance self-adaptive bearing calibration |
| CN109541339A (en) * | 2018-10-26 | 2019-03-29 | 苏州华电电气股份有限公司 | Power transformer bears short-circuit capacity pilot system |
| CN111190358A (en) * | 2020-02-26 | 2020-05-22 | 国网河南省电力公司电力科学研究院 | A 10kV closing angle control system and precise control method |
| CN111190358B (en) * | 2020-02-26 | 2023-03-14 | 国网河南省电力公司电力科学研究院 | 10kV closing angle control system and accurate control method |
| CN111751718A (en) * | 2020-05-20 | 2020-10-09 | 中国电力科学研究院有限公司 | A power electronic phase selection system and its phase selection method |
| 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 |
| CN113391198A (en) * | 2021-05-24 | 2021-09-14 | 浙江方圆电气设备检测有限公司 | Magnetic latching relay rated short circuit connection capacity test device and test method thereof |
| CN114355180A (en) * | 2021-11-26 | 2022-04-15 | 中机国际（西安）技术发展有限公司 | A power supply system and method for generating delayed zero-crossing test current |
| CN117791483A (en) * | 2024-02-27 | 2024-03-29 | 西安高压电器研究院股份有限公司 | Automatic setting method and system for capacity test time sequence |
| CN117791483B (en) * | 2024-02-27 | 2024-05-24 | 西安高压电器研究院股份有限公司 | Automatic setting method and system for capacity test time sequence |
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Effective date of registration: 20210817 Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. Address before: 710075 Shaanxi city of Xi'an Province Tang Hing Road No. 7 Patentee before: CHINA XD ELECTRIC Co.,Ltd. Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee after: Xi'an High Voltage Electrical Apparatus Research Institute Co.,Ltd. Address before: 710077 No. 18 West Second Ring Road, Shaanxi, Xi'an Patentee before: XI'AN HIGH VOLTAGE APPARATUS RESEARCH INSTITUTE Co.,Ltd. |