CN106772014A - A kind of miniature circuit breaker electric life test system and method - Google Patents
A kind of miniature circuit breaker electric life test system and method Download PDFInfo
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- CN106772014A CN106772014A CN201611251945.6A CN201611251945A CN106772014A CN 106772014 A CN106772014 A CN 106772014A CN 201611251945 A CN201611251945 A CN 201611251945A CN 106772014 A CN106772014 A CN 106772014A
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- circuit breaker
- miniature circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
A kind of miniature circuit breaker electric life test system,It is main to include exchange out-put supply,DC output power,AC load,DC load,Voltage and current sensor,Industrial computer,Industrial computer is by bus to friendship,Dc source and friendship are straight,Current load sends instruction,Hand over,Dc source is according to the automatic setting major loop output voltage of instruction to miniature circuit breaker,Hand over,DC load then Auto-matching impedance loop,It is determined that the test main circuit current that test miniature circuit breaker needs,Industrial computer sends instruction to motor driver,The manipulator circulation of controlled motor drives the closed and disconnected of tested miniature circuit breaker,Voltage sensor collection miniature circuit breaker is moved,Voltage between stationary contact,And send industrial computer to and be analyzed treatment,Realize that circuit breaker electrical endurance is tested automatically,This method of testing is easy,Also improve the reliability and accuracy of result of the test judgement,Substantially increase operating efficiency,Reduce cost of labor.
Description
Technical field
The present invention relates to a kind of miniature circuit breaker electric life test system and method.
Background technology
Miniature circuit breaker is most popular a kind of terminal protection electrical equipment in various electric terminal power distribution equipments, its application
Amount is big and wide.If miniature circuit breaker reliability is bad, its loss for causing is huge, therefore to miniature circuit breaker
The test of electric life is necessary.There are corresponding test platform, such as Shanghai electrical equipment section in some domestic Recognizing NCBs
Research institute, Guangzhou Inst. of Electric Equipment Science etc. are learned, is all to invest national early stage, equipment is relatively backward, and build is huge, automation
Low degree.
The electric life of miniature circuit breaker refers to that under the conditions of the connection and disjunction of regulation, electrical equipment is not required to repair and be not required to change
What any parts can bear has load number of operations.When electrical endurance test is carried out, the main contact of tested miniature circuit breaker is
Connected by the experimental condition of defined in product standard and disjunction circuit.Conventional test methodologies are with regulation transformer manually
Give miniature circuit breaker main circuit power supply, manually matched load, reach the standard requirement electric current of major loop requirement, power because
Number.Drive miniature circuit breaker to connect and disjunction using PLC control cylinder drivers, and detect the dynamic and static contact of miniature circuit breaker
Between voltage signal low and high level is converted into carry out life test.Traditional scheme method of testing is by judging miniature circuit breaker
Whether high and low level can only judge that miniature circuit breaker cannot be normal as the qualified foundation of electric life when dynamic and static contacting is turned off
The situation of closed and disconnected, if arcing between contact, contact resistance increases and failure will be unable to be caught in；It is general to use punching
Transformer is hit as out-put supply, bulky, voltage-regulation fineness is low, it is necessary to set manually, security is poor；Whole test
System automation low degree, using cylinder as drive device, noise is big during experiment, and test environment is more severe.
The content of the invention
The object of the invention is directed to the deficiency of existing test system, there is provided a kind of miniature circuit breaker electric life test system and
Test method, optimizes miniature circuit breaker electric life method of testing, lifts test system automatization level, improves test result accurate
True property and operating efficiency, reduce cost of labor.
In order to achieve the above object, the present invention provides a kind of miniature circuit breaker electric life test system, main to include exchange
Out-put supply, DC output power, AC load, DC load, voltage and current sensor, it is characterised in that：Voltage and electricity
The output end of flow sensor connects an industrial computer, and industrial computer is loaded by bus and AC and DC power supply and AC and DC, motor drives
Dynamic device connection, realizes the communication and control to each test equipment, and miniature circuit breaker is arranged on motor driver, cross, straight
Stream power supply constitutes the major loop of test together with miniature circuit breaker and AC and DC load in series, and industrial computer is given by bus
AC and DC power supply and friendship are straight, current load sends instruction, and AC and DC power supply is given according to the automatic major loop output voltage that sets of instruction
Miniature circuit breaker, AC and DC loads then Auto-matching impedance loop, it is determined that the test major loop electricity that test miniature circuit breaker needs
Stream, industrial computer sends instruction to motor driver, and the manipulator circulation of controlled motor drives the closure of tested miniature circuit breaker
And disconnection, the voltage between voltage sensor collection miniature circuit breaker dynamic and static contact, and send industrial computer to and be analyzed place
Reason, realize that circuit breaker electrical endurance is tested automatically, current sensor detection main circuit current whether be miniature circuit breaker specified work
Make electric current, if it exceeds the 30% of main circuit current setting value, test will be alarmed and stops, protecting test system.
The AC and DC is loaded with general and two kinds of Setting patterns of amendment, is selected by industrial computer and is controlled, its
Middle common-mode only needs to, according to standard requirement configuration main circuit voltage, electric current, power factor or time constant, set
Simple and fast；Modification model is needed to set main circuit voltage, electric current, resistance and inductance value, and the impedance to test loop itself is entered
Row amendment.
Described motor driver is a kind of miniature circuit breaker electrical endurance test motor-driven mechanism, and it is mechanical, electrical by electricity
Machine control unit, horizontal slide, manipulator and miniature circuit breaker stationary fixture composition, industrial computer can be by motor control unit
The setting of rotating speed, torque, cycle-index, manipulator progressive position, centre position, going-back position to motor is micro- to be precisely controlled
The connection and disjunction of type breaker, by adjusting the position of manipulator and fixture, adapt to the miniature circuit breaker of Multiple Type specification.
Present invention also offers a kind of miniature circuit breaker electric life method of testing, it is characterised in that comprise the following steps：
1st, power supply main circuit voltage, the electric current of the direct configuration testing system of the man machine operation interface of industrial computer, the work(of load
Rate factor or time constant, miniature circuit breaker closing time, turn-off time, contact-voltage measuring number of poles, expected electric life
Number, the expected number of stoppages；
2nd, industrial computer control power supply, load, motor start successively, each pole when measurement miniature circuit breaker is closed, disconnected every time
Voltage between dynamic and static contact；
3rd, when miniature circuit breaker is closed, if any dynamic and static contact voltage of miniature circuit breaker is more than main circuit voltage
5%, then it is expected the number of stoppages and adds 1, and restarts to test next time；If full contact voltage is respectively less than main circuit voltage
5%, then miniature circuit breaker is disconnected, and continue to detect the voltage of contacts at different levels；
If the 4, now any dynamic and static contact voltage of miniature circuit breaker, less than the 95% of main circuit voltage, is expected failure
Number of times adds 1, and restarts to test next time；If now miniature circuit breaker full contact voltage is more than main circuit voltage
95%, then this number of life expectancy Jia 1, and is tested next time；If it is expected that the number of stoppages first reaches sets target value, then try
End is tested, otherwise untill test will persistently reach expected electric life number of times；
5th, test data and fault message are finally recorded, test report is generated.
Present invention beneficial effect compared with prior art is：
(1) man machine operation interface that this test system is developed by industrial computer and based on Labview, can directly configure survey
Each device parameter of test system and the order for starting are easy to operate, quick.The work of remote control equipment, by tested miniature open circuit
The test data passback of device, and analyze and process on this basis, bulk registration simultaneously judges electric life number of times and the number of stoppages, realizes
The Automatic Control of miniature circuit breaker electric life test system, substantially increases operating efficiency, reduces cost of labor.
(2) the miniature circuit breaker electric life method of testing that the present invention is applied, by detecting the dynamic and static contact of miniature circuit breaker
Between voltage percentage, judge whether the process of the connection disjunction of miniature circuit breaker fails, this method can either judge micro-
Type breaker cannot normally closed and disconnect failure conditions, arcing between dynamic and static contact can also be judged, cause contact resistance
Increase and failure conditions.Such as contact resistance increase, certain pressure drop can be produced when closure, can cause now contact electricity
When pressure increase is beyond main circuit voltage value 5%, then it is considered as failure.This method of testing is easy, also improves result of the test judgement
Reliability and accuracy.
(3) connection to miniature circuit breaker, disjunction are completed using motor driver must be operated, and its control accuracy is high,
Drive device noise than conventional cylinder type is much lower.The system can Automated condtrol manipulator stroke, displacement, and circulation
Number of times, can also replace experimenter to complete associative operation, improve the security of test process.
(4) main circuit current is detected using current sensor, if fruit finds that main circuit current has excessively stream, phase shortage, can be tight
Anxious alarm, and stop test, improve the reliability and security of test process.
Brief description of the drawings
Fig. 1 is measurement system diagram of the present invention；
1. industrial computer；2. AC power；3. dc source；4. DC load；5. AC load；6. voltage/current is sensed
Device；7. miniature circuit breaker；8. motor driver.
Fig. 2 is test flow chart of the invention.
Specific embodiment
With reference to Fig. 1, whole test system is by industrial computer, AC power, dc source, AC load, DC load, voltage
Current sensor, motor driver composition.Industrial computer is born by bus and AC power, dc source, AC load, direct current
Carry, motor driver completes communication and controls；AC and DC power output end is straight with tested miniature circuit breaker, friendship by cable
Current load is connected, the major loop of composition electric life test；Industrial computer control AC and DC power supply output miniature circuit breaker major loop
Operating voltage, AC and DC loads the impedance according to the instruction Auto-matching major loop of industrial computer, determines miniature circuit breaker major loop
Operating current；Tested miniature circuit breaker is fixed on motor driver, adjusts displacement, angle and the position of manipulator
Put, industrial computer being capable of normal ON and the tested miniature circuit breaker of shut-off by bus marco machinery hand；Current sensor seals in survey
Examination major loop, monitors main circuit current；The dynamic and static contact both end voltage of voltage sensor senses miniature circuit breaker, and voltage is believed
Number industrial computer is sent to, to test data analysis treatment.
During test, according to tested miniature circuit breaker model and parameter, selecting to test by man-machine interface on industrial computer needs
Either AC or DC sources, load equipment, data acquisition channel number and the relevant voltage sensor wanted, configure AC DC electric
The impedance loop and power factor or time constant of source output voltage, AC and DC load and power supply output matching, data acquisition
The sample rate and no-load voltage ratio of passage, the range of voltage sensor, miniature circuit breaker closed and disconnected time, it is contemplated that life-span number of times, event
Barrier life-span number of times.After configuring all test equipments and parameter, industrial computer is by bus marco electric power output voltage, loop load
Start work, servomotor drives turning on and off for tested miniature circuit breaker, electricity according to the life expectancy number of cycles of setting
Pressure sensor starts collection miniature circuit breaker per extremely dynamic, voltage between stationary contact, and it is sent to industrial computer by test data, to every
Test data analyzer is processed and judges whether each result of the test meets criterion during secondary closed and disconnected.If meeting judgement
Standard, then continue executing with, and terminates when the life expectancy for setting, if do not met, counts the expected number of stoppages, if
The number of times reaches setting value, then off-test.
In AC and DC load configuration pattern, common-mode is the most frequently used pattern, directly sets the power factor letter of load
Just, fast, the step of eliminating computing impedance and induction reactance；Modification model is to directly input impedance and induction reactance, this side after calculating
The line impedance that formula can in itself exist to test system is modified, and improves test loop power factor or time constant
Accuracy.
With reference to Fig. 2, the control process that specific industrial computer is performed is as follows：
1. on-test, configuration testing test parameters is carried out by the man-machine interface in industrial computer, mainly there is AC DC electric
Source major loop output voltage；Load main circuit voltage, electric current and power factor or time constant；Other parameters also have breaker
Closing time, breaker opening times, expected electric life number of times, the expected number of stoppages, contact-voltage measuring number of poles；
2. industrial computer controls each equipment of testing results system；
3. control main circuit power to enable DO by industrial computer to close, motor drives and enables DO closures, data acquisition voltage
Detection enables DO closures, and load enables DO closures.Now AC and DC power supply major loop output voltage, AC and DC load starts fortune
OK, motor driver can circulate work, and voltage sensor senses are tested voltage between the dynamic and static contact of miniature circuit breaker, and
Using this voltage as main circuit voltage U；
4. motor driver is closed by manipulator and is test for miniature circuit breaker, and the duration is the breaker of setting
Closing time；
5. magnitude of voltage between detecting tested miniature circuit breaker per extremely dynamic and static contact in closing time；
6. judge the voltage of miniature circuit breaker contact whether more than the 5% of main circuit voltage U；
If 7. more than the 5% of main circuit voltage U, circuit breaker failure number of times adds 1 to the voltage of any contact；
8. motor driver is disconnected by manipulator and is test for miniature circuit breaker；
9. judge that the miniature circuit breaker number of stoppages reaches the expected number of stoppages；
If 10. the miniature circuit breaker number of stoppages is not up to the expected number of stoppages, returns and perform step 5；
If the 11. miniature circuit breaker number of stoppages reach the expected number of stoppages, record test data, result, generation experiment
Report；
If 12. all miniature circuit breaker contact voltages are less than the 5% of main circuit voltage U, disconnection is test for miniature disconnected
Road device, the duration is the miniature circuit breaker turn-off time of setting；
13. detect magnitude of voltage between the every extremely dynamic and static contact of tested miniature circuit breaker within turn-off time；
Whether 14. judge the voltage of miniature circuit breaker contact less than the 95% of main circuit voltage U；
If less than the 95% of U, the miniature circuit breaker number of stoppages adds 1 to the voltage of 15. any contacts, then return and perform step
Rapid 8；
If more than the 95% of U, circuit breaker electrical endurance number of times adds 1 to 16. all contact voltages；
17. judge whether miniature circuit breaker life-span number of times reaches life expectancy number of times；
If 18. miniature circuit breaker life-span number of times are not up to life expectancy number of times, return and perform step 5；
If 19. miniature circuit breaker life-span number of times reach life expectancy number of times, record test data, result, generation experiment
Report；
20. enable DO finally by industrial computer control main circuit power disconnects, and motor drives enable DO to disconnect, collecting unit
Voltage detecting enables DO and disconnects, and load enables DO and disconnects, and all devices are stopped, off-test.
Claims (4)
1. a kind of miniature circuit breaker electric life test system, main to include that exchange out-put supply, DC output power, exchange are negative
Load, DC load, voltage and current sensor, it is characterised in that：The output end of voltage and current sensor connects an industrial computer,
Industrial computer is loaded by bus with AC and DC power supply and AC and DC, motor driver is connected, and is realized to each test equipment
Communication and control, miniature circuit breaker are arranged on motor driver, and AC and DC power supply is negative with miniature circuit breaker and AC and DC
Load is cascaded, and constitutes the major loop of test, and industrial computer is by the way that bus is to AC and DC power supply and hands over straight, current load to send finger
Order, AC and DC power supply is according to the automatic setting major loop output voltage of instruction to miniature circuit breaker, AC and DC load then automatic
With impedance loop, it is determined that testing the test main circuit current that miniature circuit breaker needs, industrial computer sends finger to motor driver
Order, the manipulator circulation of controlled motor drives the closed and disconnected of tested miniature circuit breaker, voltage sensor to gather miniature open circuit
Voltage between the dynamic and static contact of device, and send industrial computer to and be analyzed treatment, realize that circuit breaker electrical endurance is tested automatically, electricity
Flow sensor detection main circuit current whether be miniature circuit breaker rated operational current, if it exceeds main circuit current setting value
30%, will alarm and stop test, protect test system.
2. a kind of miniature circuit breaker electric life test system according to claim 1, it is characterised in that：The AC and DC
Be loaded with it is general and amendment two kinds of Setting patterns, selected by industrial computer and controlled, wherein common-mode only need to by
Sighting target alignment request configuration main circuit voltage, electric current, power factor or time constant, set simple and fast；Modification model
Need to set main circuit voltage, electric current, resistance and inductance value, the impedance to test loop itself is modified.
3. a kind of miniature circuit breaker electric life test system according to claim 1, it is characterised in that：Described motor drives
Dynamic device is a kind of miniature circuit breaker electrical endurance test motor-driven mechanism, it by motor, motor control unit, horizontal slide,
Manipulator and miniature circuit breaker stationary fixture are constituted, industrial computer can by motor control unit to the rotating speed of motor, torque, follow
Ring number of times, manipulator progressive position, centre position, going-back position setting come be precisely controlled miniature circuit breaker connection and point
It is disconnected, by adjusting the position of manipulator and fixture, adapt to the miniature circuit breaker of Multiple Type specification.
4. a kind of miniature circuit breaker electric life method of testing described in claim 1, it is characterised in that comprise the following steps：
（1）Power supply main circuit voltage, the electric current of the direct configuration testing system of man machine operation interface of industrial computer, the power of load because
Number or time constant, it is miniature circuit breaker closing time, turn-off time, contact-voltage measuring number of poles, expected electric life number of times, pre-
The phase number of stoppages；
（2）Industrial computer control power supply, load, motor start successively, respectively extremely moved when measurement miniature circuit breaker is closed, disconnected every time,
Voltage between stationary contact；
（3）When miniature circuit breaker is closed, if any dynamic and static contact voltage of miniature circuit breaker is more than the 5% of main circuit voltage,
Then it is expected the number of stoppages and adds 1, and restarts to test next time；If full contact voltage is respectively less than the 5% of main circuit voltage,
Miniature circuit breaker is then disconnected, and continues to detect the voltage of contacts at different levels；
（4）If now any dynamic and static contact voltage of miniature circuit breaker is expected the number of stoppages less than the 95% of main circuit voltage
Plus 1, and restart to test next time；If now miniature circuit breaker full contact voltage is more than the 95% of main circuit voltage,
Life expectancy this number Jia 1, and is tested next time；If it is expected that the number of stoppages first reaches sets target value, then off-test,
Untill otherwise test will persistently reach expected electric life number of times.
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| CN107271897A (en) * | 2017-08-02 | 2017-10-20 | 苏州上电科电气设备有限公司 | A kind of miniature circuit breaker failtests equipment |
| CN107290660A (en) * | 2017-08-01 | 2017-10-24 | 浙江方圆电气设备检测有限公司 | A kind of miniature circuit breaker detecting system |
| CN107831433A (en) * | 2017-11-16 | 2018-03-23 | 湖南工业大学 | Tongue tube life detecting method |
| CN107870299A (en) * | 2017-10-12 | 2018-04-03 | 温州大学 | The detection means and its detection method of breaker of plastic casing tripping mechanism |
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| CN107271897A (en) * | 2017-08-02 | 2017-10-20 | 苏州上电科电气设备有限公司 | A kind of miniature circuit breaker failtests equipment |
| CN107870299A (en) * | 2017-10-12 | 2018-04-03 | 温州大学 | The detection means and its detection method of breaker of plastic casing tripping mechanism |
| CN107870299B (en) * | 2017-10-12 | 2020-03-31 | 温州大学 | Detection device and detection method for tripping mechanism of molded case circuit breaker |
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| CN107966655A (en) * | 2017-11-16 | 2018-04-27 | 湖南工业大学 | Tongue tube life counter measuring method |
| CN108362955A (en) * | 2017-11-30 | 2018-08-03 | 中国航空综合技术研究所 | A method of dynamic contact element is tested under vibration, load-up condition |
| CN108362955B (en) * | 2017-11-30 | 2020-04-07 | 中国航空综合技术研究所 | Method for testing movable contact element under vibration and load conditions |
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Application publication date: 20170531 |