CN100353175C - Test device for small breaker reliability - Google Patents
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- CN100353175C CN100353175C CNB2004100941482A CN200410094148A CN100353175C CN 100353175 C CN100353175 C CN 100353175C CN B2004100941482 A CNB2004100941482 A CN B2004100941482A CN 200410094148 A CN200410094148 A CN 200410094148A CN 100353175 C CN100353175 C CN 100353175C
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Abstract
The present invention relates to a reliability test device of small circuit breakers, which is composed of a test control cabinet, a test sample cabinet, a high-current test cabinet and a load cabinet, wherein the test control cabinet comprises an industrial control computer and a contact state test circuit; the test sample cabinet comprises test samples of a miniature circuit breaker, a hand lever operating mechanism of the test samples, and a switching-on / switching-off drive circuit of a hand lever; the high-current test cabinet comprises an automatic current regulating and testing circuit; the load cabinet comprises a matching load circuit. The device utilizes module circuits, such as the industrial control computer, the contact state test circuit, a data acquisition circuit, etc. to automatically operate and test the hand lever operation of the miniature circuit breaker, the operation of the operating mechanism, the contact reliability of contacts, and the instantaneous release protection reliability of a release. The present invention is also used for various types of miniature circuit breakers with similar structures and has definite universality.
Description
Technical field:
The invention belongs to a kind of experiment detection device of isolating switch, particularly a kind of test device for small breaker reliability that electric equipment products is carried out fail-test.
Background technology:
Along with the raising of daily life electrifing degree and the development of urban construction, adopt high performance miniature circuit breaker more and more universal as the overload and the short-circuit protection of the electric wiring in dwelling house and the resemble construction thing and device and distribution terminal circuit and device.At present, the demand of the miniature circuit breaker of series such as C45, DZ47 is being increased sharply, the annual production of miniature circuit breaker is also improving constantly, at present domestic its gross annual output amount reached 100,000,000 extremely more than.Miniature circuit breaker mainly is meant: " being used to exchange the AC circuit breaker that 50Hz, voltage 380V and following, electric current 125A and following, specified limit short circuit breaking capacity are no more than 25000A ".Whether the device that the reliability of miniature circuit breaker height directly has influence on the distribution line can safe operation, and national economy is had significant impact.Reliability test is according to reliability sampling theory and reliability test method development, miniature circuit breaker is carried out the test unit of the special use of the assessment of reliability level and checking, utilize reliability test that miniature circuit breaker is carried out fail-test, can find the potential faults of miniature circuit breaker, thereby impel manufacturer to measures such as product improve, finally improve the reliability of products level.Therefore, the development test device for small breaker reliability has crucial meaning and practical value to guaranteeing with raising miniature circuit breaker product quality and reliability.
In existing correlation technique, research for the test unit of low-voltage circuit breaker mainly contains three kinds: first kind of device is to adopt the pneumatic operator mode to drive circuit breaker handle, but can only finish closing/sub-switching operation of isolating switch, the contact state of contact not monitored; Second kind of device is at moving trip-gear platform of the wink of DZ15-40 breaker of plastic casing design, only the tripping function of electrical apparatus release tested, and can not realize that isolating switch closes/sub-switching operation; The third is the breaker of plastic casing reliability test; this device is just tested the breaker of plastic casing that the handle electric driving mechanism is arranged; branch by finishing the breaker of plastic casing handle for electric driving mechanism on/off electricity/close; and can only carry out the test of operational reliability aspect, can not check moving protection of electrical apparatus release wink reliability.At present, all belong to improvement about the document of miniature circuit breaker, and do not appear in the newspapers both at home and abroad about the content of test device for small breaker reliability aspect to miniature circuit breaker inner member or structural design aspect.
Summary of the invention
The problem to be solved in the present invention be at lack at present specially to miniature circuit breaker carry out fail-test test unit present situation and a kind of test device for small breaker reliability is provided.Solved the Several Key Problems of judging small breaker reliability: solved and utilized industrial computer to realize the robotization of small breaker reliability test, overcome the shortcomings such as error that precision is not high and human factor causes that people's manual manipulation causes; Also solved how accurately judge closing/the sub-switching operation process in; miniature circuit breaker built-in function mechanism and the real reliability level problem that is electrically connected; and the realization of simulation short-circuit current and the problems such as judgement of trip status have been solved in the moving protection feature process of the wink of detecting the miniature circuit breaker electrical apparatus release simultaneously.The test device for small breaker reliability of the present invention's development does not see that in the design aspect the above-mentioned Several Key Problems relevant report is arranged.In addition, the present invention can take into account the various model miniature circuit breakers of similar structures, has certain versatility.
Technical scheme of the present invention is as follows:
The present invention utilizes modularized circuits such as industrial computer, contact state testing circuit and data acquisition circuit that lever operated, the operating mechanism operation of miniature circuit breaker and contact contact reliability and moving protection of electrical apparatus release wink reliability are operated automatically and tested.
Test device for small breaker reliability comprises test control cabinet, product testing cabinet, cranking test cabinet and load cabinet; Wherein, test control cabinet comprises industrial computer 1 and contact state testing circuit 5; Product testing cabinet comprises that the handle operation mechanism 3 and the handle of many miniature circuit breaker test products 4, test product close/separating brake driving circuit 2; The cranking test cabinet comprises electric current adjusting and test circuit 7 automatically; The load cabinet comprises match load circuit 6.Industrial computer 1 automatically regulates with electric current respectively and closes with handle with test circuit 7, contact state testing circuit 5/and separating brake driving circuit 2 links to each other; Handle closes/and separating brake driving circuit 2 links to each other with handle operation mechanism 3; Handle operation mechanism 3 links to each other with miniature circuit breaker test product 4; Miniature circuit breaker test product 4 links to each other with contact state testing circuit 5 and match load circuit 6 again.
Described handle closes/and separating brake driving circuit 2 comprises data imput output circuit 21, first photoelectricity coupling, 22, second photoelectrical coupler 25, motor 23, mechanical arm travel switch 24; Its connected mode is that industrial computer 1 is connected with data imput output circuit 21 with I/O data line 210 by address wire 200, the output interface of data imput output circuit 21 is connected with the input end of first photoelectrical coupler 22 by signal wire 211, the output terminal of first photoelectrical coupler 22 links to each other with motor 23 through signal wire 212, motor 23 links to each other with miniature circuit breaker test product 4 by handle operation mechanism 3, the mechanical arm travel switch of installing on handle operation mechanism 3 24 is connected with second photoelectrical coupler 25 by signal wire 222, links to each other with the input interface of data imput output circuit 21 by signal wire 221 again.
Described contact state testing circuit 5 comprises traffic pilot 50, data collector 51, second data buffer 52, the 3rd photoelectrical coupler 53, digital to analog converter 54, voltage amplifier 55, voltage comparator 56, the 4th photoelectrical coupler 57, data register 58 and first data buffer 59; Its connected mode is that industrial computer 1 links to each other with traffic pilot 50 through signal wire 501, and traffic pilot 50 links to each other with data register 58 through signal wire 520; Industrial computer 1 links to each other with data collector 51 through bidirectional signal line 500, data collector 51 connects second data buffer 52 through signal wire 502, connect the 3rd photoelectrical coupler 53 through signal wire 503 again, connect digital to analog converter 54 through signal wire 504, connect voltage amplifier 55 through signal wire 505 again, connect voltage comparator 56 through signal wire 506 again, test product contact 70 connects voltage comparator 56 through signal wire 507, voltage comparator 56 connects the 4th photoelectrical coupler 57 through signal wire 508, connect data register 58 through signal wire 509 again, connect first data buffer 59 through signal wire 510 again, connect data collector 51 through signal wire 51 1 again, form the signal controlling loop.
Described electric current is regulated with test circuit 7 automatically and is comprised Automatic Regulation Control circuit 71, circuit switching control circuit 72, data acquisition circuit 73, experiment power supply 74, major loop switch 75, electric voltage regulator 76, transformer 77, branch switch 78, sampling resistor 79 and product to be tested contact 70; Its connected mode is that experiment power supply 74 connects major loop switch 75, connects electric voltage regulator 76, connects transformer 77, connects branch switch 78, connects sampling resistor 79, connects product to be tested contact 70 through signal wire 705 through signal wire 704 through signal wire 703 through signal wire 702 through signal wire 701 through signal wire 700 successively, after signal wire 706 links to each other with experiment power supply 74, form a test loop.Industrial computer 1 in the test control cabinet links to each other with Automatic Regulation Control circuit 71 by signal wire 707, and Automatic Regulation Control circuit 71 is connected with electric voltage regulator 76 through signal wire 708 again; Industrial computer 1 links to each other with circuit switching control circuit 72 by signal wire 709, and circuit switching control circuit 72 is connected with major loop switch 75, branch switch 78 respectively through signal wire 710,711 again; Industrial computer 1 links to each other with data acquisition circuit 73 by signal wire 713, and data acquisition circuit 73 is connected with sampling resistor 79 through signal wire 712 again.
Described many assembly cover load circuits 6 are made up of load power source, supporting resistance, for test product contact two ends provide voltage signal.
The present invention compared with prior art has following main beneficial effect:
1. can carry out operational reliability test and moving protection of wink fail-test to many miniature circuit breakers simultaneously;
2. have stronger versatility, can take into account the various model miniature circuit breakers of similar structures;
3. can close automatically test product/separating brake do not have blasting operation, and operating frequency is adjustable in 10～500 times/hour scopes, and can carry out the monitoring of voltage between contact drop and breaking-off contact to many to contact simultaneously, and judges the test product failure condition;
4. solved and utilized industrial computer to realize the robotization of small breaker reliability test, overcome the shortcomings such as error that precision is not high and human factor causes that people's manual manipulation causes;
5. She Ji special-purpose load cabinet can provide the resistive load of 4 assembly cover;
6. in the process of the test, the user can make amendment to the fail-test parameter and adjust, as the contact drop ultimate value U of closed contact
Jm, test operation frequency and total test number (TN) etc.
Description of drawings
Fig. 1 is the test device for small breaker reliability structural representation;
Fig. 2 is that handle closes/separating brake driving circuit structure synoptic diagram;
Fig. 3 is a contact state testing circuit structural representation;
Fig. 4 is that electric current is regulated and the test circuit structure synoptic diagram automatically;
Fig. 5 is a test run computer programme flow diagram of the present invention;
Fig. 6 is a test device for small breaker reliability circuit diagram of the present invention.
The specific embodiment of the present invention:
Embodiment 1:
As seen from Figure 1, described test device for small breaker reliability comprises test control cabinet, product testing cabinet, cranking test cabinet and load cabinet; Wherein, test control cabinet comprises industrial computer 1 and contact state testing circuit 5; Product testing cabinet comprises that the handle operation mechanism 3 and the handle of 8 miniature circuit breaker test products 4, test product close/separating brake driving circuit 2; The cranking test cabinet comprises Automatic Regulation Control circuit 71, circuit switching control circuit 72, data acquisition circuit 73, experiment power supply 74, major loop switch 75, electric voltage regulator 76, transformer 77, branch switch 78, sampling resistor 79 and product to be tested contact 70; The load cabinet comprises match load circuit 6.Industrial computer 1 automatically regulates with electric current respectively and closes with handle with test circuit 7, contact state testing circuit 5/and separating brake driving circuit 2 links to each other; Handle closes/and separating brake driving circuit 2 links to each other with handle operation mechanism 3; Handle operation mechanism 3 links to each other with miniature circuit breaker test product 4; Miniature circuit breaker test product 4 is regulated automatically with contact state testing circuit 5, match load circuit 6 and electric current again and is linked to each other with test circuit 7.
Handle described in Fig. 1 closes/separating brake driving circuit 2 as shown in Figure 2, comprise data imput output circuit 21, first photoelectrical coupler 22, second photoelectrical coupler 25, motor 23, mechanical arm travel switch 24; Its connected mode is that industrial computer 1 is connected with data imput output circuit 21 with I/O data line 210 by address wire 200, the output interface of data imput output circuit 21 is connected with the input end of first photoelectrical coupler 22 by signal wire 211, the output terminal of first photoelectrical coupler 22 links to each other with motor 23 through signal wire 212, motor 23 links to each other with miniature circuit breaker test product 4 by handle operation mechanism 3, the mechanical arm travel switch of installing on handle operation mechanism 3 24 is connected with second photoelectrical coupler 25 by signal wire 222, links to each other with the input interface of data imput output circuit 21 by signal wire 221 again.
Contact state testing circuit 5 described in Fig. 1 comprises traffic pilot 50, data collector 51, second data buffer 52, the 3rd photoelectrical coupler 53, digital to analog converter 54, voltage amplifier 55, voltage comparator 56, the 4th photoelectrical coupler 57, data register 58 and first data buffer 59 as shown in Figure 3; Its connected mode is that industrial computer 1 links to each other with traffic pilot 50 through signal wire 501, and traffic pilot 50 links to each other with data register 58 through signal wire 520; Industrial computer 1 links to each other with data collector 51 through bidirectional signal line 500, data collector 51 connects second data buffer 52 through signal wire 502, connect the 3rd photoelectrical coupler 53 through signal wire 503 again, connect digital to analog converter 54 through signal wire 504, connect voltage amplifier 55 through signal wire 505 again, connect voltage comparator 56 through signal wire 506 again, test product contact 70 connects voltage comparator 56 through signal wire 507, voltage comparator 56 connects the 4th photoelectrical coupler 57 through signal wire 508, connect data register 58 through signal wire 509 again, connect first data buffer 59 through signal wire 510 again, connect data collector 51 through signal wire 511 again, form the signal controlling loop.
Automatic adjusting of electric current described in Fig. 1 and test circuit 7 comprise Automatic Regulation Control circuit 71, circuit switching control circuit 72, data acquisition circuit 73, experiment power supply 74, major loop switch 75, electric voltage regulator 76, transformer 77, branch switch 78, sampling resistor 79 and product to be tested contact 70 as shown in Figure 4; Its connected mode is that experiment power supply 74 connects major loop switch 75, connects electric voltage regulator 76, connects transformer 77, connects branch switch 78, connects sampling resistor 79, connects product to be tested contact 70 through signal wire 705 through signal wire 704 through signal wire 703 through signal wire 702 through signal wire 701 through signal wire 700 successively, after signal wire 706 links to each other with experiment power supply 74, form a test loop.Industrial computer 1 in the test control cabinet links to each other with Automatic Regulation Control circuit 71 by signal wire 707, and Automatic Regulation Control circuit 71 is connected with electric voltage regulator 76 through signal wire 708 again; Industrial computer 1 links to each other with circuit switching control circuit 72 by signal wire 709, and circuit switching control circuit 72 is connected with major loop switch 75, branch switch 78 respectively through signal wire 710,711 again; Industrial computer 1 links to each other with data acquisition circuit 73 by signal wire 713, and data acquisition circuit 73 is connected with sampling resistor 79 through signal wire 712 again.
Fig. 6 is the present embodiment manipulated or operated apparatus, it mainly is divided into four parts, part i is the industrial computer 1 among Fig. 1, part ii is that contact state testing circuit 5, the III among Fig. 1 partly close/handle operation mechanism 3 and the miniature circuit breaker test product 4 of separating brake driving circuit 2, test product for the handle among Fig. 1; IV partly is that the electric current among Fig. 1 is regulated and test circuit 7 automatically.
Test device for small breaker reliability described in Fig. 1 carries out the small breaker reliability test under industrial computer control, its test run program as shown in Figure 5:
(1) operation small breaker reliability test routine after computing machine powers on:
(2) judged whether test menu item selection operation (click or keyboard input), do not repeated for the 2nd step when having test menu item selection operation, changeed for the 3rd step when test menu item selection operation is arranged;
(3) judge whether to be test parameters modify feature menu, if not changeed for the 4th step, if then carry out following processing:
Carry out parameter modification by mouse and keyboard, industrial computer is preserved amended operational factor automatically, moves the parameter that computer-chronograph is called in operation last time automatically in next time.Operational factor comprises: the contact drop ultimate value, and the off voltage ultimate value, operating frequency, total test number (TN) allows the number of stoppages, dutycycle, parameters such as the rated current of test product.After revising operational factor, preserve and the demonstration operational factor, changeed for the 2nd step then.
(4) judge whether to be test figure file processing menu, if not just changeed for the 5th step, if then carry out following processing:
File processing comprised data file storage, call in, the demonstration printing of test figure etc.After a collection of test product test is finished, can test figure be saved in the computing machine by document processing module; And, former test figure can be read in by read data files; Can also test figure be presented on the graphoscope or by printer carry out output print by showing or print command.
After file processing is finished, changeed for the 2nd step.
(5) judge whether to be test initialization menu, if not changeed for the 6th step, if then carry out following processing:
Test initialization menu function allows the user to make amendment to allowing test parameterss such as Failure count, test operation number of times, contact drop ultimate value, disconnection pressure drop ultimate value by mouse and keyboard; After revising affirmation, all test parameterss change, and old test figure will change for the 2nd step with deleted (test will be carried out again according to new test parameters); After revising cancellation, test parameters does not change, and changes for the 2nd step.
(6) judge whether to be operational reliability test run menu, if not changeed for the 7th step, if then carry out following processing:
This function module by handle close/2 pairs of test products of separating brake driving circuit close a floodgate/sub-switching operation, detect the state of test product contacts in operating process by contact state testing circuit 5, judge and lost efficacy, and the information of record inefficacy test product.After test run is finished, changeed for the 2nd step.
(7) judge whether to be moving protection of wink fail-test operation menu, if not changeed for the 8th step, if then carry out following processing:
This function module is regulated and test circuit 7 simulation short-circuit currents automatically by electric current; the reliability of checking test product short-circuit protection function; be about to the test product circuit closed; regulation according to standard; to B, C, D type miniature circuit breaker, respectively test current is adjusted to 3 times or 5 times, 5 times or 10 times, 10 times or 50 times of test product rated current, detect the state of test product contact at the appointed time by contact state testing circuit 5; judge test product dropout situation, and the record result.After test run is finished, changeed for the 2nd step.
(8) judge whether to withdraw from menu for test, if not just changeed for the 2nd step, if then withdraw from the small breaker reliability test.
In the 6th step of running test, when carrying out the test of miniature circuit breaker operational reliability, the specific operation process of test is as follows:
At first, industrial computer 1 by handle close/2 pairs of test products of separating brake driving circuit carry out closing operation: promptly industrial computer 1 at first sends motor is just changeing command signal, signal passes to data imput output circuit 21 by I/O data line 210, send motor to after isolating through signal wire 211 and by first photoelectrical coupler 22 again, motor begins forward rotation, and being rotated in the forward of motor moves through handle operation mechanism 3 and change into and upwards stir the rectilinear motion that test product 4 handles carry out closing operation; When test product 4 handles combined floodgate puts in place, be installed in travel switch 24 on the handle operation mechanism 3 and can induction detect electric signal (combined floodgate put in place status signal), after this signal is isolated through signal wire 222 and by second photoelectrical coupler 25, again through signal wire 221 and by data imput output circuit 21, I/O data line 210 sends back industrial computer 1, after industrial computer 1 is judged, send motor stall instruction through I/O data line 210, through data imput output circuit 21, signal wire 211, first photoelectrical coupler 22, signal wire 212 is passed to motor, motor is stopped, thereby the handle of miniature circuit breaker test product 4 is remained on the position of combined floodgate.
After the handle of test product 4 is in closing position, industrial computer 1 detects the state of test product contact by contact state testing circuit 5: industrial computer 1 produces the chip selection signals of organizing circuit through signal wire 501, traffic pilot 50 more, chooses corresponding data register 58 to make its work through signal wire 520; Simultaneously, (according to correlation standard, U falls to industrial computer 1 in the contact loop voltage of closed contact with the contact benchmark threshold voltage set through bidirectional signal line 500, data collector 51, signal wire 502
jThe contact drop ultimate value U that should not surpass
JxFor: when load current is 1A, U
Jx=1.0A * R
Internal resistance+ 0.05U
Cd, wherein, U
CdBe contact loop rated voltage, the benchmark threshold voltage of stipulating in the test should be the contact ultimate value) be sent in second data buffer 52, isolate by the 3rd photoelectrical coupler 53 through signal wire 503 again, in digital to analog converter 54, carry out digital-to-analog conversion through signal wire 504, convert the benchmark threshold voltage to analog quantity by digital value, this aanalogvoltage is sent to an input end of voltage comparator 56 through signal wire 505 and by after the amplification of voltage amplifier 55 through signal wire 506; The voltage signal at test product contact 70 two ends is sent to another input end (voltage signal at test product contact two ends is provided by the load circuit in the load cabinet 6) of voltage comparator 56 through signal wire 507; Two signals compare through over-voltage comparator 56, logic level signal relatively is sent to selected data register 58 through signal wire 508, the 4th photoelectrical coupler 57, signal wire 509, after signal wire 510, first data buffer 59, signal wire 511, data collector 51 are sent back in the industrial computer 1.
Logic level signal relatively has high/low two kinds of situations, shows that the actual contact voltage drop value is greater than or less than the benchmark threshold voltage; When actual contact voltage drop value during, loose contact is described, otherwise contact is good greater than the benchmark threshold voltage; Thus, industrial computer 1 is by analyzing the signal that receives, and makes the judgement whether test product lost efficacy, and writes down the information of inefficacy test product.
After closing operating time finishes, industrial computer 1 by handle close/separating brake driving circuit 2 carries out sub-switching operation according to above-mentioned same method to test product; When the handle of test product 4 is in sub-gate position postpone, industrial computer 1 detects the state (voltage U between break contact of test product contact according to above-mentioned same method by contact state testing circuit 5
fShould not be lower than ultimate value U
FxUnless product standard has regulation, U in addition
FxShould be contact circuit rated voltage U
Cd90%), and the judgement of losing efficacy to the received signal, the information of record inefficacy test product.
And so forth, described handle close/separating brake driving circuit 2 can periodically close/sub-switching operation miniature circuit breaker test product 4 handles according to the frequency values of setting (10 times/hour-500 times/hour adjustable) automatically by industrial computer 1 control; Be at the handle of miniature circuit breaker test product 4 close/during the separating brake position, described contact state testing circuit 5 detects the voltage signal at test product contact two ends, to the test product judgement of losing efficacy.
When reaching test operation total degree or inefficacy test product and count, the operation of test operation fail-test stops.
In the 7th step of running test, when carrying out moving protection of miniature circuit breaker wink fail-test, the specific operation process of test is as follows:
At first, industrial computer 1 by handle close/2 pairs of products to be tested of separating brake driving circuit carry out closing operation, and confirm the test product contact closure by contact state testing circuit 5; Then, industrial computer 1 command signal is through signal wire 709, by circuit switching control circuit 72, be sent to major loop switch 75 and branch switch 78 through signal wire 710,711 respectively again,, thereby automatic adjusting of electric current and the test loop in the test circuit 7 connected its closure.
Then, industrial computer 1 is through signal wire 707, send the lifting/voltage reducing operation signal for electric voltage regulator 76 by Automatic Regulation Control circuit 71 and signal wire 708, at this moment, electric current in the test loop will increase/reduce, in lifting/voltage reducing, the test loop voltage signal of being gathered by sampling resistor 79 is through signal wire 712, data acquisition circuit 73 and signal wire 713 are passed industrial computer 1 back, in industrial computer 1, convert current value to, this current value and predetermined test current value are (according to the regulation of standard, to B, C, D type miniature circuit breaker, be respectively 3 times or 5 times of test product rated current, 5 times or 10 times, 10 times or 50 times,) compare, and then send the lifting/voltage reducing operation signal for electric voltage regulator 76 through Automatic Regulation Control circuit 71 by industrial computer 1, the test current in the test loop equals predetermined current value.
At last, when test loop, test product place electric current during for predetermined test current, at the appointed time, industrial computer 1 detects the state of test product contacts by contact state testing circuit 5, judges the result that the test product electrical apparatus release is threaded off, and log.
After finishing test number (TN), moving protection of wink fail-test is out of service.
Described load cabinet can provide four assembly cover resistive load, can be respectively by selector switch combination selection in two kinds of voltages of 24V, 6V and two kinds of electric currents of 1A, 0.1A.
Embodiment 2:
Described test device for small breaker reliability, handle close/and motor 23 in the separating brake driving circuit 2 also can adopt unidirectional electric rotating machine.
All the other structures and principle are identical with embodiment 1.
Claims (5)
1. test device for small breaker reliability is characterized by by test control cabinet, product testing cabinet, and the cranking test cabinet becomes with the load group; Wherein, test control cabinet comprises industrial computer (1) and contact state testing circuit (5); Product testing cabinet comprises that the handle operation mechanism (3) and the handle of miniature circuit breaker test product (4), test product close/separating brake driving circuit (2); The cranking test cabinet comprises electric current adjusting and test circuit (7) automatically; The load cabinet comprises match load circuit (6); The connected mode of each ingredient of test device for small breaker reliability be industrial computer (1) automatically regulate with electric current respectively close with handle with test circuit (7), contact state testing circuit (5)/separating brake driving circuit (2) links to each other; Handle closes/and separating brake driving circuit (2) links to each other in turn with handle operation mechanism (3), miniature circuit breaker test product (4), contact state testing circuit (5), and wherein miniature circuit breaker test product (4) is regulated automatically with match load circuit (6) and electric current respectively again and is linked to each other with test circuit (7).
2. according to the described test device for small breaker reliability of claim 1, it is characterized in that described handle close/separating brake driving circuit (2) comprises data imput output circuit (21), first photoelectrical coupler (22), second photoelectrical coupler (25), motor (23), mechanical arm travel switch (24); Handle closes/and separating brake driving circuit (2) connected mode is that industrial computer (1) is connected with data imput output circuit (21) with I/O data line (210) by address wire (200), the output interface of data imput output circuit (21) is connected with the input end of first photoelectrical coupler (22) by signal wire (211), the output terminal of first photoelectrical coupler (22) links to each other with motor (23) through signal wire (212), motor (23) links to each other with miniature circuit breaker test product (4) by handle operation mechanism (3), go up the mechanical arm travel switch of installing (24) at handle operation mechanism (3) and be connected with second photoelectrical coupler (25), link to each other with the input interface of data imput output circuit (21) by signal wire (221) again by signal wire (222).
3. according to the described test device for small breaker reliability of claim 1, it is characterized in that described contact state testing circuit (5) comprises traffic pilot (50), data collector (51), second data buffer (52), the 3rd photoelectrical coupler (53), digital to analog converter (54), voltage amplifier (55), voltage comparator (56), the 4th photoelectrical coupler (57), data register (58) and first data buffer (59); Contact state testing circuit (5) connected mode is that industrial computer (1) links to each other in turn with signal wire (501), traffic pilot (50), signal wire (520), data register (58); Simultaneously, industrial computer (1) also with bidirectional signal line (500), data collector (51), signal wire (502), second data buffer (52), signal wire (503), the 3rd photoelectrical coupler (53), signal wire (504), digital to analog converter (54), signal wire (505), voltage amplifier (55), signal wire (506), voltage comparator (56), signal wire (508), the 4th photoelectrical coupler (57), signal wire (509), data register (58), signal wire (510), first data buffer (59) connects in turn, first data buffer (59) connects data collector (51) through signal wire (511) again, forms the signal controlling loop; In addition, test product contact (70) is connected with voltage comparator (56) through signal wire (507).
4. according to the described test device for small breaker reliability of claim 1, it is characterized in that described electric current is regulated automatically and test circuit (7) comprises Automatic Regulation Control circuit (71), circuit switching control circuit (72), data acquisition circuit (73), experiment power supply (74), major loop switch (75), electric voltage regulator (76), transformer (77), branch switch (78), sampling resistor (79) and product to be tested contact (70); It is that experiment power supply (74) is linked to each other with signal wire (700), major loop switch (75), signal wire (701), electric voltage regulator (76), signal wire (702), transformer (77), signal wire (703), branch switch (78), signal wire (704), sampling resistor (79), signal wire (705), product to be tested contact (70) in turn that electric current is regulated automatically with test circuit (7) connected mode, after signal wire (706) links to each other with experiment power supply (74), form a test loop; Industrial computer in the test control cabinet (1) is connected with signal wire (707), Automatic Regulation Control circuit (71), signal wire (708) and electric voltage regulator (76) in turn; Meanwhile industrial computer (1) also links to each other with signal wire (709), circuit switching control circuit (72), signal wire (710) and major loop switch (75) in turn; Wherein circuit switching control circuit (72) is connected with branch switch (78) with signal wire (711) again in turn; Industrial computer (1) links to each other with data acquisition circuit (73) by signal wire (713), and data acquisition circuit (73) is connected with sampling resistor (79) through signal wire (712) again.
5. according to the described test device for small breaker reliability of claim 2, it is characterized in that described handle close/motor (23) in the separating brake driving circuit (2) is rotating motor or unidirectional turning motor.
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| CNB2004100941482A CN100353175C (en) | 2004-12-31 | 2004-12-31 | Test device for small breaker reliability |
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|---|---|---|---|
| CNB2004100941482A CN100353175C (en) | 2004-12-31 | 2004-12-31 | Test device for small breaker reliability |
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| CN100353175C true CN100353175C (en) | 2007-12-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100335909C (en) * | 2005-09-12 | 2007-09-05 | 北京四方清能电气电子有限公司 | A novel circuit for electric and electronic power module test and pulse control method thereof |
| CN100426000C (en) * | 2005-09-29 | 2008-10-15 | 河北工业大学 | Plastic-casing circuit breaker instantaneous characteristic test device |
| CN100432690C (en) * | 2006-01-25 | 2008-11-12 | 天津市百利电气有限公司 | Integrated test bench for creepage breaker |
| CN102981118B (en) * | 2011-09-06 | 2015-06-03 | 首瑞（北京）投资管理集团有限公司 | Breaker state monitoring system |
| EP2664936B1 (en) * | 2012-05-10 | 2018-08-22 | Omicron electronics GmbH | Measuring device for testing an electrical circuit breaker |
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