CN103983916A - Miniature circuit breaker standard long time delay characteristic testing method - Google Patents
Miniature circuit breaker standard long time delay characteristic testing method Download PDFInfo
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- CN103983916A CN103983916A CN201410232296.XA CN201410232296A CN103983916A CN 103983916 A CN103983916 A CN 103983916A CN 201410232296 A CN201410232296 A CN 201410232296A CN 103983916 A CN103983916 A CN 103983916A
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Abstract
The invention discloses a miniature circuit breaker standard long time delay characteristic testing method. The miniature circuit breaker standard long time delay characteristic testing method comprises the following steps that a PLC system is used for adjusting the output voltage of a voltage regulator module, the current for testing is output after the output voltage is transformed through a transformer, the PLC system controls a clamp to clamp a breaker to be tested and controls a plurality of contactors to move in a matched mode to be combined with the breaker to form a testing loop capable of achieving interelectrode current direction, one current detecting unit is used for judging the qualification of the breaker to be tested, a set low-level current is transmitted into the switched-on breaker, the time T1 is delayed, if the breaker tripping occurs, the breaker is not qualified, if the breaker tripping does not occur, a set high-level current is transmitted, the time T2 is delayed, if the breaker tripping occurs, the breaker is qualified, and if the breaker tripping does not occur, the breaker is not qualified. By means of the testing method, the miniature circuit breaker standard long time delay characteristic can be effectively judged, the testing current is stable and reliable, the testing precision is high, and data are processed accurately.
Description
Technical field
The present invention relates to a kind of miniature circuit breaker standard long delay characteristic test method, belong to miniature circuit breaker temporal properties intelligent test technical field.
Background technology
Miniature circuit breaker is a kind of protector being widely used in industrial automation and building industry low-voltage distribution system.Along with national industrial automation and building industry iterative method, increasing miniature circuit breaker has been put into on-the-spot in service.Existing miniature circuit breaker service data shows, the conventional sense of carrying out according to technical standard has been guaranteed the supply of material quality of miniature circuit breaker to a certain extent, but cannot get rid of the hidden failure of miniature circuit breaker inherence, such as: mistake disjunction, breaking current value is unstable etc., and these faults mostly belong to miniature circuit breaker inaccurate test causes in conventionally test situation.Once occur, just cannot effectively protect distribution system of living in, cut off rapidly circuit, the consequence that caused is so very serious.
Miniature circuit breaker standard long delay characteristic, more conventional detection means is exactly artificial at present, relates to artificial tune size of current, and rule of thumb voltage is adjusted in judgement, may need repeatedly to adjust several times and need artificial cognition disjunction, labour intensity is large, and experience requires high, causes data to occur that mistake is difficult to find or chance on, probability of happening is lower, and be difficult for reappearing, finally cause undesired the dispatching from the factory of same batch products standard long delay characteristic, terminal user is caused to loss difficult to the appraisal.
Summary of the invention
The object of the present invention is to provide a kind of miniature circuit breaker standard long delay characteristic test method.
For solving the problems of the technologies described above, the invention provides a kind of miniature circuit breaker standard long delay characteristic test method, it is characterized in that: comprise the following steps:
Regulate the output voltage of pressure regulator module by PLC control system, the electric current of output for testing after transformer transformation;
PLC control system control fixture clamps isolating switch to be measured, and controls multiple contactor interoperations and this isolating switch composition and can realize arbitrarily the test loop that electrode current flows to,
By a current detecting unit, the isolating switch of test is carried out to qualification judgement: the low-grade location electric current from setting to the isolating switch closing a floodgate the time delay T1 that pass into, if circuit breaker trip is unacceptable product, if isolating switch does not trip, continue to pass into high tap position electric current the time delay T2 of setting, if circuit breaker trip is certified products, be unacceptable product if isolating switch does not trip.
Described PLC control system and computer data processing system carry out data interaction, utilize remote data transmission that the data computing power of computer data processing system and the data real-time memory system being connected with computer data processing system, Ethernet are realized to treat with surveillance that test both opens device time-delay characteristics curve is drawn and analysis.
By the output voltage of real-time voltage monitoring modular Real-Time Monitoring pressure regulator module, and feed back to PLC control system and carry out the adjusting of output voltage.
Output current value after transformer transformation feeds back to PLC control system by real-time current monitoring modular.
After transformer transformation, in the process of output current, demonstrate in real time fast current value by crest ammeter.
Output current is gathered after peak point current by intelligent observe and control instrument, by computer data processing system, converts effective value to and directly shows, facilitates testing staff's reading, increases work efficiency.
Test required in test loop is provided by constant current source with electric current.
The beneficial effect that the present invention reaches:
Method of testing of the present invention can effectively judge miniature circuit breaker standard long delay characteristic.Measuring current is reliable and stable, and measuring accuracy is high, and data processing is accurate.
Brief description of the drawings
Fig. 1 is control principle drawing;
Fig. 2 is data handling system schematic diagram of the present invention;
Fig. 3 is testing process schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
As shown in Figure 1, realize control system by PLC and carry out the adjusting of pressure regulator module voltage, carry out the adjusting of output voltage by the feedback of real-time voltage monitoring modular; Realize the output of large electric current by the security transformer of permanent power, low-voltage, in its process, can show fast by crest ammeter, and by real-time current monitoring modular, output current value is fed back to PLC and control; Realize the clamping to product by PLC control system control gear fixture, realize the detection of product, one of wherein inner many contactors mix proportion can be realized arbitrarily the control that electrode current flows to, without regulating braiding power line terminal, in native system, current detecting is divided into two grades of systems, the electric current that its low-grade location passes into setting carries out time delay T1 test, should test and trip without automatically entering the electric current time delay T2 that high tap position sets after tripping operation during this time, by internal current detecting unit, the product of having tested be carried out to qualification judgement.
Further, as shown in Figure 2, carry out data interaction by computer data processing system and PLC real-time control system, test both opens device product time-delay characteristics Drawing of Curve and automatic analysis are treated in the realization such as remote data transmission and surveillance that utilizes the high-speed data computing power of computer data processing system and the jumbo data real-time memory system being connected with computer data processing system, Ethernet to realize, and complete the data system judgement that conventional PLC cannot process.
Method of testing comprises the following steps:
1) according to the rated current of test product and verification multiple, determine the size of rated current, system is selected corresponding measuring current and test duration automatically.
2) test product is put into test fixture, can automatically detect test product by one-shot switch test bed, test product should be in default action current and reliable disjunction in the time.
3) inside and outside microprocessor system is processed test data.
As shown in Figure 3, the test of miniature circuit breaker standard long delay judges flow process, and its concrete determining step is as follows:
Step 1: open device power supply (DPS), and set test duration, electric current, start test;
Step 2: according to standard GB 10963.1-2005, input low-grade electric current I to isolating switch to be measured
lowif, in master gauge fixed length delay time t, trip, this isolating switch is defective; If do not tripped, this isolating switch initial survey is qualified;
Step 3: when step 2 is qualified while judging isolating switch to be measured by low-grade electric current, then to isolating switch input high tap position electric current I to be measured
highif, tripping operation in standard official hour t, this isolating switch is qualified; If do not tripped, this isolating switch is defective.
On testing table of the present invention, be also provided with the element such as constant current source, touch-screen.Testing required electric current is provided by constant current source.Output current is gathered after peak point current by intelligent observe and control instrument, by inside and outside microprocessor system, converts effective value to and directly shows, facilitates testing staff's reading, increases work efficiency.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and distortion, these improvement and distortion also should be considered as protection scope of the present invention.
Claims (7)
1. a miniature circuit breaker standard long delay characteristic test method, is characterized in that: comprise the following steps:
Regulate the output voltage of pressure regulator module by PLC control system, the electric current of output for testing after transformer transformation;
PLC control system control fixture clamps isolating switch to be measured, and controls multiple contactor interoperations and this isolating switch composition and can realize arbitrarily the test loop that electrode current flows to,
By a current detecting unit, the isolating switch of test is carried out to qualification judgement: the low-grade location electric current from setting to the isolating switch closing a floodgate the time delay T1 that pass into, if circuit breaker trip is unacceptable product, if isolating switch does not trip, continue to pass into high tap position electric current the time delay T2 of setting, if circuit breaker trip is certified products, be unacceptable product if isolating switch does not trip.
2. miniature circuit breaker standard long delay characteristic test method according to claim 1, it is characterized in that: described PLC control system and computer data processing system carry out data interaction, utilize remote data transmission that the data computing power of computer data processing system and the data real-time memory system being connected with computer data processing system, Ethernet are realized to treat with surveillance that test both opens device time-delay characteristics curve is drawn and analysis.
3. miniature circuit breaker standard long delay characteristic test method according to claim 1, is characterized in that: by the output voltage of real-time voltage monitoring modular Real-Time Monitoring pressure regulator module, and feed back to PLC control system and carry out the adjusting of output voltage.
4. miniature circuit breaker standard long delay characteristic test method according to claim 1, is characterized in that: the output current value after transformer transformation feeds back to PLC control system by real-time current monitoring modular.
5. miniature circuit breaker standard long delay characteristic test method according to claim 1, is characterized in that: after transformer transformation, in the process of output current, demonstrate in real time fast current value by crest ammeter.
6. miniature circuit breaker standard long delay characteristic test method according to claim 2, is characterized in that: output current is gathered after peak point current by intelligent observe and control instrument, by computer data processing system, converts effective value to and directly shows.
7. miniature circuit breaker standard long delay characteristic test method according to claim 1, is characterized in that: test electric current required in test loop is provided by constant current source.
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| CN201410232296.XA CN103983916A (en) | 2014-05-29 | 2014-05-29 | Miniature circuit breaker standard long time delay characteristic testing method |
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| CN201410232296.XA CN103983916A (en) | 2014-05-29 | 2014-05-29 | Miniature circuit breaker standard long time delay characteristic testing method |
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Application publication date: 20140813 |