CN202886562U - Automatic reliability testing device for electric operating mechanisms of moulded case circuit breakers - Google Patents
Automatic reliability testing device for electric operating mechanisms of moulded case circuit breakers Download PDFInfo
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- CN202886562U CN202886562U CN 201220561936 CN201220561936U CN202886562U CN 202886562 U CN202886562 U CN 202886562U CN 201220561936 CN201220561936 CN 201220561936 CN 201220561936 U CN201220561936 U CN 201220561936U CN 202886562 U CN202886562 U CN 202886562U
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Abstract
The utility model relates to an automatic reliability testing device for electric operating mechanisms of moulded case circuit breakers. The device comprises a test controlling cabinet and a test sample cabinet, wherein the test controlling cabinet comprises an IPC (Industrial Personal Computer), a driving circuit, an electric operating mechanism condition monitoring circuit and a breaker condition monitoring circuit; the test sample cabinet comprises an auxiliary power supply regulating circuit, a test sample, a breaker and a load circuit; the IPC is respectively connected with the driving circuit, the electric operating mechanism condition monitoring circuit and the breaker condition monitoring circuit; the driving circuit is respectively connected with the auxiliary power supply regulating circuit, the test sample and the breaker; the auxiliary power supply regulating circuit is connected with the test sample; the test sample is respectively connected with the electric operating mechanism condition monitoring circuit and the breaker; and the breaker is connected with the breaker condition monitoring circuit and the load circuit. The device disclosed by the utility model is controlled by utilizing the IPC, so that the reliability testing of the electric operating mechanisms of the breakers can be automatically and accurately completed.
Description
Technical field:
The utility model belongs to the test unit in the low-voltage electrical apparatus field of accessories, particularly a kind of electric operation mechanism for breaker with plastics casing reliability test.
Background technology:
Electric operation mechanism for breaker with plastics casing is the important external accessory of breaker of plastic casing, can realize at a distance breaker of plastic casing being carried out closure, disconnection and again button operation.In view of the update of breaker of plastic casing itself and the continuous expansion of its application scenario, the application of motor-operating mechanism is also more and more extensive, and the reliability of motor-operating mechanism will directly affect the functional reliability of isolating switch.Fail-test is the important means that guarantees the motor-operating mechanism reliability, and reliability test is the necessary condition of finishing fail-test.Therefore, carrying out the research of electric operation mechanism for breaker with plastics casing fail-test technology and the development work tool of test unit is of great significance.
The producer that produces at present both at home and abroad motor-operating mechanism is a lot, and still, to the research of motor-operating mechanism reliability engineering seldom, motor-operating mechanism reliability automatic test equipment correlation technique also almost is in blank both at home and abroad.
Aspect the motor-operating mechanism product technology, " electric operating mechanism of circuit-breaker " (number of applying for a patent 98223648.4) designed a kind of novel electric operating mechanism of circuit-breaker, because two armature of this kind motor-operating mechanism inside are placed about being side by side, even now so that the size of motor-operating mechanism on width, increased in right amount, but greatly reduce in length, make its be more suitable for regulator cubicle in isolating switch support the use; In addition because the rotation friction of finger plate is smaller, so that the starting current of electromagnet diminishes, thereby the requirement of electromagnet is reduced, reduced production cost.The motor-operating mechanism compact conformation of " electric operating mechanism of circuit-breaker " (number of applying for a patent 200610038866.7) design make easy for installation, the conserve space of this motor-operating mechanism, and each parts is chain more reliable, flexible operation; This motor-operating mechanism separating brake, combined floodgate, the reliability of button is high again, vibrations and noise when having reduced work, when isolating switch frame size rated current changes, do not need to reinstall individual event device and transmission gear at different levels and output shaft at different levels, aspect installation, have conveniently advantage.A kind of method for designing of electric operation mechanism for breaker with plastics casing is mentioned in " electric operation mechanism for breaker with plastics casing " (number of applying for a patent 95243357.5), introduced the serviceability of motor-operating mechanism, this kind motor-operating mechanism is simple in structure, reliable in action, easy for installation, is that breaker of plastic casing carries out remote electronic closure, disconnection and detains the special part of operation again.Above patent all belongs to the introduction to this body structure of motor-operating mechanism product, function and principle of work, does not all relate to fail-test technology and the test unit thereof of motor-operating mechanism.For the quality that ensures the electric operation mechanism for breaker with plastics casing product, improve its reliability, in the urgent need to a kind of reliability test of high automation level.
The utility model content:
Problem to be solved in the utility model is: at present to electric operation mechanism for breaker with plastics casing fail-test technology and test unit research this problem seldom, provide a kind of device that can automatically finish the motor-operating mechanism fail-test mainly for domestic.This device is take industrial computer as control core, automaticity is high, and the mode that adopts ac solid relay control electromagnetic relay drives control motor-operating mechanism test product (hereinafter to be referred as test product) execution closure, disconnects and again button operation, thereby drive the breaker of plastic casing (hereinafter to be referred as isolating switch) that matches with it and finish closure, disconnection and again button operation, also control simultaneously circuit breaker tripping.The solid-state relay response time of adopting is short, reliability is high, long service life.This device can be finished the electric operation mechanism for breaker with plastics casing fail-test automatically, and can in process of the test, detect voltage signal between motor-operating mechanism mode bit voltage signal and breaker of plastic casing contact in real time, realize the automatic diagnosis of motor-operating mechanism and circuit breaker failure, and record trouble information.Test unit can realize that accessory power supply is adjustable, can switch the control circuit rated voltage of test product, can realize that test product control circuit voltage is adjustable between interchange 0～440V and direct current 0～250V, make this test unit carry out fail-test to the test product of different size, improved the utilization factor of test unit.
The technical solution of the utility model is:
A kind of electric operating mechanism of circuit-breaker reliability automatic test equipment, this device is comprised of software section and hardware components.Software section is comprised of test parameters setting and modified module, document processing module, identification and debugging module and test run module; Hardware components is comprised of test control cabinet and product testing cabinet.Test control cabinet comprises industrial computer (hereinafter to be referred as industrial computer), driving circuit, motor-operating mechanism status monitoring circuit and State-Inspect of High-Voltage Circuit circuit; Product testing cabinet comprises accessory power supply regulating circuit, test product, isolating switch and load circuit, and wherein, industrial computer links to each other with the State-Inspect of High-Voltage Circuit circuit with driving circuit, motor-operating mechanism status monitoring circuit respectively; Driving circuit links to each other with accessory power supply regulating circuit, test product, isolating switch respectively again; The accessory power supply regulating circuit links to each other with test product again; Test product links to each other with isolating switch with motor-operating mechanism status monitoring circuit respectively again; Isolating switch links to each other with load circuit with the State-Inspect of High-Voltage Circuit circuit again.
Described isolating switch is breaker of plastic casing;
Described test product is 6 motor-operating mechanisms that cooperate the frame size rated current to use at 63A～225A isolating switch, or 4 motor-operating mechanisms that cooperate the frame size rated current to use at 400A～800A isolating switch, or 2 motor-operating mechanisms that cooperate the frame size rated current to use at 1250A～1600A isolating switch;
Described driving circuit comprises 16 DO unit, the first ac solid relay, the second ac solid relay, the 3rd ac solid relay, the first electromagnetic relay and the second electromagnetic relay.Its connected mode is that industrial computer passes through the DO data line and links to each other with 16 DO unit, 16 DO unit are by signal wire 201, signal wire 204 and signal wire 207 respectively with the first ac solid relay, the second ac solid relay links to each other with the input end of the 3rd ac solid relay, the output terminal of the first ac solid relay is by signal wire 202 controls the first electromagnetic relay, the output terminal of the second ac solid relay is by signal wire 205 controls the second electromagnetic relay, the output terminal of the 3rd ac solid relay is by signal wire 208 control A.C. contactors, the first electromagnetic relay is by signal wire 203 control test products, and the second electromagnetic relay is by signal wire 206 control isolating switchs.
Described motor-operating mechanism status monitoring circuit comprises sub-signal modulate circuit, photoelectrical coupler, DI input circuit and the first data buffer.Its connected mode is that test product mode bit voltage signal (voltage signal that refers to test product closed and disconnected control terminal place) links to each other with signal conditioning circuit by signal wire, signal conditioning circuit links to each other with the input end of photoelectrical coupler by signal wire, the output terminal of photoelectrical coupler links to each other with the DI input circuit by signal wire, and the DI input circuit links to each other with the first data buffer by signal wire.
Described State-Inspect of High-Voltage Circuit circuit comprises pressure filter circuit, A/D converter and the second data buffer.Its connected mode is that voltage signal links to each other with pressure filter circuit by signal wire between contact of breaker, and pressure filter circuit links to each other with A/D converter by signal wire, and A/D converter links to each other with the second data buffer by signal wire; The second data buffer links to each other with industrial computer with A/D converter respectively with the IO data line by signal wire.
Described accessory power supply regulating circuit comprises electric voltage regulator, gear switch circuit, rectifier bridge and A.C. contactor, and power source regulating circuit both can output AC voltage, also can output dc voltage.Its connected mode is that three-phase supply links to each other with the input end of electric voltage regulator by signal wire, the output terminal of electric voltage regulator links to each other with the gear switch circuit by signal wire, the gear switch circuit links to each other with A.C. contactor with rectifier bridge respectively by signal wire, rectifier bridge links to each other with A.C. contactor by signal wire, and driving circuit links to each other with A.C. contactor by signal wire simultaneously.Wherein said gear switch circuit is comprised of switch and electromagnetic relay.
Electric operating mechanism of circuit-breaker reliability automatic test equipment described in the utility model is automatically operation under the control of industrial computer, can carry out fail-test to test product.Take CD2 series test product as example, when carrying out fail-test, its control step is:
1) industrial computer is by the required control circuit voltage of driving circuit control accessory power supply regulating circuit output test product, industrial computer is by motor-operating mechanism status monitoring circuit Real-Time Monitoring test product control circuit voltage simultaneously, if control circuit voltage is less than the rated operational voltage of test product, then be judged to be accessory power supply regulating circuit output voltage fault, this moment, prompting user checked adhesive situation and the circuit connection of A.C. contactor, otherwise the A.C. contactor adhesive is normal;
Judge whether test number (TN) reaches the test total degree, preserve test parameters and the test of test findings backed off after random when reaching the test total degree; Otherwise the control test product is closed, tests, and turns step 2);
2) if non-selected motor-operating mechanism fine motion detection mode detects voltage drop between contact of breaker in real time, voltage drop is less than the contact drop ultimate value when between contact of breaker, and closure time do not transfinite, and then test product is normal, otherwise the test product fault.If select motor-operating mechanism fine motion detection mode, between the detection contact of breaker, also detect test product mode bit voltage signal in the voltage drop, in order to judge the closure state of test product, voltage drop is less than the contact drop ultimate value when between contact of breaker, and the status signal of test product make-position is high level signal, and the status signal of open position is low level signal, and closure time does not transfinite, then test product is normal, otherwise the test product fault; Turn step 3);
3) when the test product fault, the control A.C. contactor discharges to cut off the accessory power supply of test product, when this test product number of stoppages reaches the permission number of stoppages, judge that then this test product lost efficacy, device no longer operates this test product, other test products are normally tested, and when whole test products lost efficacy, then preserve the test of test parameters and test findings backed off after random; Otherwise turn step 4);
4) judge that whether test number (TN) is more than or equal to the initial order of trip-gear of setting, and judge that whether the trip-gear number of times is less than the trip-gear total degree, when test number (TN) more than or equal to the initial order of trip-gear, and when the trip-gear number of times is less than the trip-gear total degree, the control circuit breaker tripping, detect simultaneously voltage drop between contact of breaker, voltage drop is greater than disconnecting the pressure drop ultimate value when between contact of breaker, it is normal then to be judged as isolating switch, turn step 5), otherwise think circuit breaker failure, if user selection the replacing stoppage circuit breaker, then after changing stoppage circuit breaker, the user turns step 5), if the non-selected replacing stoppage circuit breaker of user then directly turns step 5); When test number (TN) less than the initial order of trip-gear or when the trip-gear number of times is greater than the trip-gear total degree, the control test product disconnects, and turns step 5);
5) if non-selected motor-operating mechanism fine motion detection mode detects voltage drop between contact of breaker in real time, voltage drop and is not transfinited greater than disconnecting the pressure drop ultimate value trip time when between contact of breaker, and then test product is normal, otherwise the test product fault.If select motor-operating mechanism fine motion detection mode, between the detection contact of breaker, also detect test product mode bit voltage signal in the voltage drop, in order to judge the off-state of test product, voltage drop is greater than disconnecting the pressure drop ultimate value when between contact of breaker, the status signal of test product open position is high level signal, and the status signal of make-position is low level signal, and does not transfinite trip time, then test product is normal, otherwise the test product fault; Turn step 6);
6) when the test product fault, the control A.C. contactor discharges to cut off the accessory power supply of test product, when this test product number of stoppages reaches the permission number of stoppages, judge that then this test product lost efficacy, device no longer operates this test product, other test products are normally tested, if all test product lost efficacy, then preserve the test of test parameters and test findings backed off after random and turn step 1).
The utility model compared with prior art has following main beneficial effect:
1. the utility model is controlled by industrial computer, can automatically, accurately finish the electric operating mechanism of circuit-breaker fail-test, has improved the automatization level of fail-test, and stable and reliable operation; This device provides good man-machine interactive interface, makes things convenient for the user to the test control of process and checking test findings.
2. test unit can be simultaneously to 1～6 motor-operating mechanism that cooperates the frame size rated current to use at 63A～225A isolating switch, or 1～4 motor-operating mechanism that cooperates the frame size rated current to use at 400A～800A isolating switch, or 1～2 cooperation frame size rated current is carried out fail-test, has been improved the efficient of fail-test at 1250A～1600A isolating switch use motor-operating mechanism.
3. adopt ac solid relay control electromagnetic relay mode to drive test product and carry out closed procedure, opening operation and again button operation, finish closure, disconnection and button again thereby drive the isolating switch that matches with it, can also control circuit breaker tripping simultaneously; It is short that ac solid relay has the response time, long working life, Reliability of Microprocessor advantages of higher.
4. the test unit accessory power supply is adjustable, can switch the rated voltage of test product control circuit, can realize that test product control circuit voltage is adjustable between interchange 0～440V and direct current 0～250V, make test unit be applicable to the test product of multiple nominal control volatge grade, improved the utilization factor of test unit.
5. the utility model can carry out automatic fault diagnosis to the test product in the process of the test and isolating switch, and test unit is reported to the police and automatic excision fault after the fault.
6. the utility model is according to the automatic preservation test figure of arranging of user and failure logging, and can be with test figure and failure logging printout.
7. the utlity model has complete data protection function, test figure is not lost behind the accident power-off, does not destroy the test figure that has gathered behind the power up, the permanent computing machine that is stored in of test figure, and can easily transfer in the External memory equipment.
Description of drawings:
Fig. 1 is the utility model embodiment test unit block diagram
Fig. 2 is the utility model embodiment driving circuit structure synoptic diagram
Fig. 3 is the utility model embodiment motor-operating mechanism status monitoring electrical block diagram
Fig. 4 is the utility model embodiment State-Inspect of High-Voltage Circuit electrical block diagram
Fig. 5 is the utility model embodiment accessory power supply regulating circuit synoptic diagram
Fig. 6 is the utility model embodiment control circuit synoptic diagram
Fig. 7 is the utility model embodiment software flow pattern
Embodiment:
Embodiment: (specifying by reference to the accompanying drawings)
As shown in Figure 1, electric operating mechanism of circuit-breaker reliability automatic test equipment described in the utility model, this device is comprised of software section and hardware components.Software section is comprised of test parameters setting and modified module, document processing module, identification and debugging module and test run module; Hardware components is comprised of test control cabinet and product testing cabinet.Test control cabinet comprises industrial computer (1), driving circuit (2), motor-operating mechanism status monitoring circuit (3) and State-Inspect of High-Voltage Circuit circuit (4); Product testing cabinet comprises accessory power supply regulating circuit (5), test product (6), isolating switch (7) and load circuit (8).Wherein, what (does following meeting explain test product specifically refer to, whether just can delete here? do not delete, thisly repeat statement and have a problem?).Industrial computer (1) is made of display, main frame and keyboard, links to each other with driving circuit (2), motor-operating mechanism status monitoring circuit (3) and State-Inspect of High-Voltage Circuit circuit (4) respectively; Driving circuit (2) links to each other with accessory power supply regulating circuit (5), test product (6) and isolating switch (7) respectively again; Accessory power supply regulating circuit (5) links to each other with test product (6) again; Test product (6) links to each other with isolating switch (7) with motor-operating mechanism status monitoring circuit (3) respectively again; Isolating switch (7) links to each other with load circuit (8) with State-Inspect of High-Voltage Circuit circuit (4) respectively again.
Electric operating mechanism of circuit-breaker reliability automatic test equipment as shown in Figure 1, automatically operational reliability test under the control of industrial computer.Industrial computer (1) is according to every test parameters of setting, rated operational voltage by driving circuit (2) control accessory power supply regulating circuit (5) output test product (6) control loop, also control the closure of test product (6) and the dropout of disconnection and isolating switch (7), simultaneously industrial computer (1) detects the mode bit voltage signal of test product (6) closed and disconnected position according to the detection mode of selecting in real time by motor-operating mechanism status monitoring circuit (3), and State-Inspect of High-Voltage Circuit circuit (4) detects voltage signal between isolating switch (7) contact in real time.When test product (6) fault, test unit sends warning, and when the number of stoppages of this fault test product reaches the maximum permission number of stoppages, think that this test product (6) lost efficacy, industrial computer (1) is no longer tested the test product (6) of this inefficacy, can suspend test in the process of the test or withdraw from test, after the test cycle number of times that reaches setting or whole test product inefficacy, test stops automatically.
Described isolating switch is breaker of plastic casing, what wherein the cooperation test product was tested in the process of the test is 6 breaker of plastic casing that the frame size rated current is 63A～225A, also can be 4 breaker of plastic casing that the frame size rated current is 400A～800A, or 2 breaker of plastic casing that the frame size rated current is 1250A～1600A.
Described is that test product is motor-operating mechanism, this test unit can be to 6 motor-operating mechanisms that cooperate the frame size rated current to use at 63A～225A isolating switch, also can be the motor-operating mechanism that cooperates the frame size rated current to use at 400A～800A isolating switch to 4, or 2 cooperate the frame size rated current to carry out fail-test at the motor-operating mechanism that 1250A～1600A isolating switch uses.
Driving circuit described in Fig. 1 (2) comprises 16 DO unit (21), the first ac solid relay (22), the first electromagnetic relay (23), the second ac solid relay (24), the second electromagnetic relay (25) and the 3rd ac solid relay (26) as shown in Figure 2.Driving circuit (2) adopts the driving method of ac solid relay control electromagnetic relay.Its connected mode is that industrial computer (1) links to each other with 16 DO unit (21) by DO data line (200), and 16 DO unit (21) link to each other with the input end of the first ac solid relay (22), the second ac solid relay (24), the 3rd ac solid relay (26) respectively by signal wire (201), signal wire (204), signal wire (207); The output terminal of the first ac solid relay (22) links to each other with the wire loop of the first electromagnetic relay (23) by signal wire (202), the normally opened contact of the first electromagnetic relay (23) is series at closure or the cutoff circuit of test product (6) by signal wire (203), the closed and disconnected of control test product (6); The output terminal of the second ac solid relay (24) links to each other with the wire loop of the second electromagnetic relay (25) by signal wire (205), the normally opened contact of the second electromagnetic relay (25) is series at the shunt opening wire loop of isolating switch (7) by signal wire (206), and control isolating switch (7) is threaded off; The normally opened contact of the 3rd ac solid relay (26) is series at the wire loop of A.C. contactor (44) in the accessory power supply regulating circuit (4) by signal wire (208).
The described motor-operating mechanism status monitoring of Fig. 1 circuit (3) comprises signal conditioning circuit (31), photoelectrical coupler (32), DI input circuit (33) and the first data buffer (34) as shown in Figure 3.Wherein, signal conditioning circuit (31) is amplified by diode, current-limiting resistance, two-stage triode and rc filter circuit forms, DI input circuit (32) cooperates divider resistance to form by+5V DC voltage, and motor-operating mechanism status monitoring circuit (3) is digital quantity input sample mode.Its connected mode is that test product (6) mode bit voltage signal links to each other with signal conditioning circuit (31) by signal wire (301), through signal conditioning circuit (31) test product (6) mode bit voltage signal is amplified, link to each other with the input end of photoelectrical coupler (32) by signal wire (302) after the conversion, the output terminal of photoelectrical coupler (32) links to each other with DI input circuit (33) by signal wire (303), and DI input circuit (33) will reflect that the digital quantity signal of the mode bit voltage of test product (6) closed and disconnected position links to each other with the first data buffer (34) by signal wire (304); The first data buffer (34) links to each other with industrial computer (1) by IO data line (300), gives industrial computer (1) data transmission.
The described State-Inspect of High-Voltage Circuit circuit of Fig. 1 (4) comprises pressure filter circuit (41), A/D converter (42) and the second data buffer (43) as shown in Figure 4.Wherein, it is that voltage signal links to each other with pressure filter circuit (41) by signal wire (401) between isolating switch (7) contact that pressure filter circuit (41) composes in parallel its connected mode by divider resistance and filter capacitor, voltage signal is changed and filtering between pressure filter circuit (41) is to isolating switch (7) contact, voltage signal after the conversion is linked to each other with A/D converter (42) by signal wire (402), A/D converter (42) links to each other with the second data buffer (43) by signal wire (403), give the second data buffer (43) data transmission after the A/D conversion, the second data buffer (43) links to each other with industrial computer (1) by signal wire (400), transfer data to industrial computer (1), industrial computer (1) links to each other with A/D converter (42) by signal wire (404) simultaneously, with signal (as: the startup A/D sampled signal of control A/D conversion, A/D sampling frequency signal and A/D sampling channel are selected signal etc.) pass to A/D converter (42).
The described accessory power supply regulating circuit of Fig. 1 (5) comprises electric voltage regulator (51), gear switch circuit (52), rectifier bridge (53) and A.C. contactor (54) as shown in Figure 5.Its connected mode is that external three-phase supply links to each other by the input end of signal wire with electric voltage regulator (51), the output terminal of electric voltage regulator (51) links to each other with gear switch circuit (52) by signal wire (501), gear switch circuit (52) links to each other with A.C. contactor (54) by signal wire (503), driving circuit (2) is by signal wire (208) control A.C. contactor (54) adhesive and release, if A.C. contactor (54) adhesive this moment, then accessory power supply regulating circuit output AC voltage; Gear switch circuit (52) links to each other with rectifier bridge (53) by signal wire (502) again, supply voltage after overcommutation links to each other with A.C. contactor (54) by signal wire (504), if driving circuit this moment (2) is by the adhesive of signal wire (208) control A.C. contactor (54), then accessory power supply regulating circuit output dc voltage.
Fig. 6 is the control circuit synoptic diagram of present embodiment device, and it mainly is divided into six parts.Part i is the industrial computer (1) among Fig. 1, comprises main frame, display and keyboard.Part ii is driving circuit among Fig. 1 (2), by the input end conducting of bus output control signal control ac solid relay AC SSR0 ~ AC SSR18.Wherein, ac solid relay AC SSR0～AC SSR11 is corresponding is the first ac solid relay (22) in Fig. 2 driving circuit, AC SSR12～AC SSR17 is the second ac solid relay (24), and AC SSR18 is the 3rd ac solid relay (26); Corresponding the first electromagnetic relay (23) of K0 ~ K11, corresponding the second electromagnetic relay (25) of K12 ~ K17.The output of ac solid relay AC SSR0～AC SSR5 is the break-make of pilot relay K0 ~ K5 wire loop respectively, the a pair of normally opened contact string of each electromagnetic relay is coupled to respectively the closed-loop path of corresponding test product (6) among K0 ~ K5, control test product (6) closure, the closed procedure of realization test product (6); The output of ac solid relay AC SSR6～AC SSR11 is the break-make of pilot relay K6 ~ K11 wire loop respectively, the a pair of normally opened contact of each electromagnetic relay is series at respectively the cutoff circuit of corresponding test product (6) among K6 ~ K11, control test product (6) disconnects, and realizes the opening operation of test product (6); The break-make of the output control relay K12 of ac solid relay AC SSR12～AC SSR17 ~ K17 wire loop, the a pair of normally opened contact of each relay is series at respectively the shunt opening wire loop of corresponding isolating switch (7) among K12 ~ K17, and control isolating switch (7) is threaded off; The break-make of the output control relay K18 wire loop of ac solid relay AC SSR18, the a pair of normally opened contact of relay K 18 is series at the wire loop of A.C. contactor (54), adhesive and the release of control A.C. contactor (54), the power on/off of realization test product (6) accessory power supply.III is partly for being isolating switch state detection circuit (4) among Fig. 1, and the voltage signal A1 of the A phase of an isolating switch (7), voltage signal B1 and the C voltage signal C1 mutually of B phase have only been drawn among the figure, circuit diagram is identical therewith for voltage signal simulated measurement input circuit synoptic diagram between all the other isolating switchs (7) contact, A1, B1 and C1 pass through respectively pressure filter circuit (41) signal are passed to A/D converter (42), and the data communication device after the A/D conversion is crossed bus and passed to industrial computer (1).IV partly is motor-operating mechanism status monitoring circuit (3) among Fig. 1, the mode bit voltage signal of the make-position of No. 1 test product, and behind signal conditioning circuit (31), signal is through photoelectrical coupler T
1, the digital quantity signal of generation high-low level passes to industrial computer (1) by bus again; The mode bit voltage signal at No. 1 test product open position place is through photoelectrical coupler T
12, the digital quantity signal of generation high-low level passes to industrial computer (1) by bus again.The digital quantity importation of motor-operating mechanism status monitoring circuit (3) is totally 12 road signal input circuits, is the digital input circuit of 1 to No. 6 test product closed and disconnected location status position voltage signal successively.The IV part has only drawn make-position and the signal of open position mode bit voltage signal digital input circuit of No. 1 test product, and all the other test product closed and disconnected location status position voltage signal digital input circuit synoptic diagram are identical with above-mentioned two-way digital input circuit synoptic diagram.V partly is the accessory power supply regulating circuit (5) among Fig. 1, and VI partly is the load circuit (8) among Fig. 1.
Electric operating mechanism of circuit-breaker reliability automatic test equipment shown in Figure 1 carries out fail-test automatically under the control of industrial computer, its test run program flow diagram as shown in Figure 6:
1) industrial computer (1) the rear operating circuit breaker motor-operating mechanism fail-test program that powers on;
2) judge whether to carry out for the first time the electric operating mechanism of circuit-breaker fail-test, if, then at specified location in user new construction file and forwarded for the 4th step to; If not, then forwarded for the 3rd step to;
3) call in test parameters setting last time and test figure, forwarded afterwards for the 4th step to;
4) determine whether file processing menu (mouse-click or keyboard input), if, then call document processing module, can the new construction file, preserve current project file, in addition deposit current project file or open before the project file of test; If not, then forwarded for the 5th step to;
5) determine whether to connect and the identification menu, if, then call and connect and identification module, this module comprises the connection of automatic detection test product (6) and isolating switch (7) and the type that identification is connected to the test product (6) in the circuit, if the connection of test product (6) and isolating switch (7) had been proofreaded and the type of test product (6) has been identified would forward to the 6th the step, if test product (6) and isolating switch (7) all are not connected in the circuit or the failure of test product (6) type identification, then withdraw from connection and identification module; If not, then jumped to for the 6th step;
6) determine whether the parameter setup menu, if, then call test parameters setting and modified module, main test parameters comprises: the test product model, allow the number of stoppages, the closing time ultimate value, the opening time ultimate value, the contact drop ultimate value, disconnect the pressure drop ultimate value, operating frequency, load factor, the test total degree, the trip-gear number of times, the initial order of trip-gear, test number (TN), trip-gear number of times, the test product type, the test product number, electricity behaviour fine motion detects setting and selects, fault alarm arranges and selects, change stoppage circuit breaker setting and selection, setting and the selection of the test product test number of phases, the setting of fault judgment mode and selection etc., as required test parameters can be set when beginning new engineering, test parameters can not be revised after on-test, but key in by the shortcut combination, can revise current test parameters; If not, then forwarded for the 7th step to;
7) determine whether to check menu, if then call test and check that module, this module can check respectively that test product (6) connection status, fail-test parameter arrange and the fail-test outcome record; Wherein, test findings shows fault type, closure time, the trip time of test product (6), and failure logging shows the situation that closed fault, open failure, duration of contact are long and trip time is long and isolating switch (7) loose contact of test product (6) and disconnects unfavorable condition; If not, then forwarded for the 8th step to;
8) determine whether the test adjustment menu, if, then call the test adjustment module, can select 1 or many bench teat product (6) to carry out the dropout operation of position probing, closed and disconnected operation and isolating switch (7), can detect in real time the contact drop of isolating switch (7) and disconnect pressure drop, can come by external definition equipment the precision of timing in the check program; If not, then forwarded for the 9th step to;
9) determine whether the test run menu, if, then call the test run module, this module comprises feature measurement test and two pilot projects of fail-test, industrial computer (1) is finished corresponding test run control according to every test parameters of setting and the connection status of test product (6) and isolating switch (7); If not, then forwarded for the 10th step to;
10) determine whether help menu, if, then access help file, help file comprises the full detail of whole control program, explain the function of each menucommand, the meaning of each test parameters, the item that should be noted that in the detailed process of each test model and the process of the test etc.; If not, then forwarded for the 11st step to;
11) determine whether that program withdraws from menu, if, then off-test; If not, then forwarded for the 4th step to.
When 9 steps of running test to the, when carrying out the electric operating mechanism of circuit-breaker fail-test, the specific operation process of test can be divided into following 6 steps:
9-1) industrial computer (1) is by the rated operational voltage of the control loop of driving circuit (2) control accessory power supply regulating circuit (5) output test product (6), industrial computer (1) is by motor-operating mechanism status monitoring circuit (3) Real-Time Monitoring test product (6) control circuit voltage simultaneously, if control circuit voltage is less than the rated operational voltage of test product (6), then be judged to be accessory power supply regulating circuit (4) output voltage fault, this moment, prompting user checked adhesive situation and the circuit connection of A.C. contactor (54), and withdrawed from the 9th step of test; Otherwise, proceed test;
Industrial computer (1) judges whether test number (TN) reaches the test total degree, when reaching the test total degree, preserves test parameters and test findings backed off after random and tests for the 9th step; Otherwise industrial computer (1) drives test product (6) closure by driving circuit (2), tests, and turns step 9-2);
If 9-2) non-selected motor-operating mechanism fine motion detection mode, detect in real time voltage drop between isolating switch (7) contact by State-Inspect of High-Voltage Circuit circuit (4), voltage drop is less than the contact drop ultimate value when between isolating switch (7) contact, and closure time does not transfinite, then test product (6) is normal, otherwise test product (6) fault; If select motor-operating mechanism fine motion detection mode, between detection isolating switch (7) contact, also detect test product (6) mode bit voltage signal in the voltage drop, in order to judge the closure state of test product (6), namely detect in real time the closure state of test product (6) by motor-operating mechanism status monitoring circuit (3) and detected in real time the on-state of isolating switch (7) by State-Inspect of High-Voltage Circuit circuit (4), voltage drop is less than the contact drop ultimate value when between isolating switch (7) contact, and the status signal of test product (6) make-position is high level signal, the status signal of open position is low level signal, and closure time does not transfinite, then test product (6) is normal, otherwise test product (6) fault; Turn step 9-3);
9-3) when test product (6) fault, industrial computer (1) sends alarm command, control driving circuit (2) discharges A.C. contactor (54) and cuts off test product (6) control power supply and suspend test, preserves simultaneously fail result.When the number of stoppages of this test product (6) reaches the permission number of stoppages, think that then this test product (6) lost efficacy, will no longer carry out fail-test to this test product (6), when whole test products (6) lost efficacy, then preserve test parameters and experimental result and withdraw from the 9th step of test; Otherwise, turn step 9-4) and the step;
9-4) judge that whether test number (TN) is more than or equal to the initial order of trip-gear of setting, and judge that whether the trip-gear number of times is less than the trip-gear total degree, when test number (TN) more than or equal to the initial order of trip-gear, and when the trip-gear number of times is less than the trip-gear total degree, then industrial computer (1) drives isolating switch (7) dropout by driving circuit (2), and by voltage drop between State-Inspect of High-Voltage Circuit circuit (4) detection contact, voltage drop is greater than disconnecting the pressure drop ultimate value when between contact, it is normal then to be judged as isolating switch (7), otherwise think isolating switch (7) fault, fault type is the dropout fault; If user selection the replacing stoppage circuit breaker, then after the user changes stoppage circuit breaker, turn step 9-5), when select changing stoppage circuit breaker, then directly turn step 9-5); When test number (TN) less than the initial order of trip-gear or when the trip-gear number of times is greater than the trip-gear total degree, control test product (6) disconnects, and turns step 9-5);
If 9-5) non-selected motor-operating mechanism fine motion detection mode, detect in real time voltage drop between isolating switch (7) contact by State-Inspect of High-Voltage Circuit circuit (4), voltage drop is greater than disconnecting the pressure drop ultimate value when between isolating switch (7) contact, and do not transfinite trip time, then test product (6) is normal, otherwise test product (6) fault; If select motor-operating mechanism fine motion detection mode, between detection isolating switch (7) contact, also to detect test product (6) mode bit voltage signal in the voltage drop, in order to judge the closure state of test product (6), namely detect in real time the closure state of test product (6) by motor-operating mechanism status monitoring circuit (3) and detected in real time the on-state of isolating switch (7) by State-Inspect of High-Voltage Circuit circuit (4), voltage drop is greater than disconnecting the pressure drop ultimate value when between isolating switch (7) contact, and the status signal of test product (6) open position is high level signal, the status signal of make-position is low level signal, and do not transfinite trip time, then test product (6) is normal, otherwise test product (6) fault; Turn step 9-6);
9-6) when test product (6) fault, industrial computer (1) sends alarm command, control driving circuit (2) discharges A.C. contactor (54) and cuts off test product (6) control power supply and suspend test, preserves simultaneously fail result.When the number of stoppages of this test product (6) reaches the permission number of stoppages, think that then this test product (6) lost efficacy, will no longer carry out fail-test to this test product (6), when whole test products (6) lost efficacy, then preserve test parameters and experimental result and withdraw from the 9th step of test; Otherwise, turn step 9-1) and the step;
Industrial computer (1) is as follows with the detailed process that disconnection and isolating switch (7) are threaded off by rated operational voltage, driving test product (6) closure of the control loop of driving circuit (2) control accessory power supply regulating circuit (5) output test product (6):
1) industrial computer (1) is exported accessory power supply voltage by driving circuit (2) control accessory power supply regulating circuit (5): industrial computer (1) sends control A.C. contactor (54) adhesive command signal, this signal passes to 16 DO unit (21) by DO data line (200), pass to again the input end of the 3rd ac solid relay (26) by signal wire (207), the output terminal of ac solid relay (26) is by the conducting of signal wire (208) control A.C. contactor (54) wire loop, A.C. contactor (54) adhesive, the rated operational voltage of the control loop of accessory power supply regulating circuit (5) output test product (6);
2) industrial computer (1) is controlled accessory power supply regulating loop (5) disjunction by driving circuit (2): industrial computer (1) sends control A.C. contactor (54) disjunction command signal, this signal passes to 16 DO unit (21) by DO data line (200), pass to again the input end of the 3rd ac solid relay (26) by signal wire (207), the output terminal of ac solid relay (26) is by the wire loop of signal wire (208) control A.C. contactor (54), the wire loop of A.C. contactor (54) disconnects, A.C. contactor (54) disjunction, accessory power supply regulating loop (5) is not exported the rated operational voltage of the control loop of test product (6);
3) industrial computer (1) drives test product (6) closure by driving circuit (2): industrial computer (1) sends control test product (6) close command signal, this signal passes to 16 DO unit (21) by DO data line (200), pass to again the input end of the first ac solid relay (22) by signal wire (201), the output terminal of the first ac solid relay (22) is connected by the wire loop of signal wire (202) control the first electromagnetic relay (23), the a pair of normally opened contact of the first electromagnetic relay (23) is series at the closed-loop path of test product (6) by signal wire (203), normally opened contact is closed, test product (6) closure;
4) industrial computer (1) drives test product (6) disconnection by driving circuit (2): industrial computer (1) sends control test product (6) open command signal, this signal passes to 16 DO unit (21) by DO data line (200), pass to again the input end of the first ac solid relay (22) by signal wire (201), the output terminal of the first ac solid relay (22) is connected by the wire loop of signal wire (202) control the first electromagnetic relay (23), the a pair of normally opened contact of the first electromagnetic relay (23) is series at the cutoff circuit of test product (6) by signal wire (203), normally opened contact is closed, and test product (6) disconnects;
5) industrial computer (1) drives isolating switch (7) dropout by driving circuit (2): industrial computer (1) sends control isolating switch (7) dropout command signal, this signal passes to 16 DO unit (21) by DO data line (200), pass to again the input end of the second ac solid relay (24) by signal wire (204), the output terminal of the second ac solid relay (24) is connected by the wire loop of signal wire (205) control the second electromagnetic relay (25), the a pair of normally opened contact of the second electromagnetic relay (25) is series at the shunt opening wire loop of isolating switch (7) by signal wire (206), normally opened contact is closed, the shunt opening wire loop conducting of isolating switch (7), isolating switch (7) is threaded off.
Driving circuit (2) adopts ac solid relay control electromagnetic relay to drive test product (6) closed and disconnected, isolating switch (7) dropout and control accessory power supply regulating circuit (5) output test product (6) control circuit rated operational voltage.Ac solid relay does not have component of machine, adopts controllable silicon to replace traditional contact contact, owing to there are not the parts of motion, therefore can under the environment of HI high impact, strong vibration, work, owing to adopt controllable silicon as switching device shifter, so the life-span of solid-state relay is long, reliability is high.Solid-state relay is because adopted controllable silicon, so switch speed can be from several delicate to several milliseconds, the response time is short.In addition, solid-state relay is compared traditional relay, because not input " coil " does not have contact striking and rebound, thereby reduced electromagnetic interference (EMI).
Industrial computer (1) starts sampling when test product (6) being sent the closed and disconnected order or isolating switch (7) being sent the order of threading off, be divided into digital quantity input sample and analog input sampling dual mode.Wherein the digital quantity input sample is by the state of motor-operating mechanism status monitoring circuit (3) monitoring test product (6), its detailed process is: the mode bit voltage signal of test product (6) closed and disconnected position, pass to signal conditioning circuit (31) by signal wire (301), signal after signal conditioning circuit (31) amplifies conditioning is connected to the input end of photoelectrical coupler (32) by signal wire (302), photoelectrical coupler (32) produces the digital quantity signal of reflection test product (6) closed and disconnected location status by signal wire (303) and DI input circuit (33), this digital quantity signal is transferred to the first data buffer (34) by signal wire (304), be transferred to industrial computer (1) by IO data line (300) again, so far finish the digital quantity input sample; The analog input sampling is by the state of circuit-breaker status testing circuit (4) monitoring breaker (7), detailed process is: voltage signal is received the input end of pressure filter circuit (41) by signal wire (401) between isolating switch (7) contact, be connected to A/D change-over circuit (42) through pressure filter circuit (41) voltage transitions and filtered voltage signal by signal wire (402), industrial computer (1) will be controlled control signal (as: the startup A/D sampled signal of A/D conversion again by signal wire (404) through the second data buffer (43) by IO data line (400), A/D sampling frequency signal and A/D sampling channel are selected signal etc.) be transferred to A/D converter (42), the data that A/D converter (42) will be undertaken by the conditioned voltage signal that signal wire (403) pass over after A/D changes and will change are stored in the second data buffer (43), be transferred to industrial computer (1) by IO data line (400) again, so far finish the analog input sampling.
Industrial computer (1) is distinguished the state that detects in real time test product (6) and isolating switch (7) according to the selection of fault detect mode by motor-operating mechanism status monitoring circuit (3) and State-Inspect of High-Voltage Circuit circuit (4) in the process of test product (6) closed and disconnected, take CD2 series test product as example:
Observation process in the closed procedure: if non-selected motor-operating mechanism fine motion detects, in test product (6) closing course, detect in real time voltage drop between isolating switch (7) contact by State-Inspect of High-Voltage Circuit circuit (4), if voltage drop is less than the contact drop ultimate value between contact, and closure time is less than the closure time ultimate value, it is closed normal then to be judged to be test product (6), otherwise judges test product (6) fault, and fault type is closed fault; If selected motor-operating mechanism fine motion detection mode, also to detect in real time test product (6) mode bit voltage signal by motor-operating mechanism status monitoring circuit (3) when detecting in real time between isolating switch (7) contact voltage drop by State-Inspect of High-Voltage Circuit circuit (4) so, in order to judge the closure state of test product (6), if voltage drop is less than the contact drop ultimate value between contact, and the status signal of test product (6) make-position is high level signal, the status signal of open position is low level signal, closure time does not transfinite, then test product (6) is closed normal, otherwise test product (6) fault, fault type is closed fault.
Observation process in the opening operation: if non-selected motor-operating mechanism fine motion detects, in test product (6) disconnection process, detect in real time voltage drop between isolating switch (7) contact by State-Inspect of High-Voltage Circuit circuit (4), if voltage drop is greater than disconnecting the pressure drop ultimate value between contact, and trip time is greater than ultimate value trip time, then be judged to be test product (6) and disconnect normally, otherwise judge test product (6) fault, fault type is open failure; If selected motor-operating mechanism fine motion detection mode, also to detect in real time test product (6) mode bit voltage signal by motor-operating mechanism status monitoring circuit (3) when detecting in real time between isolating switch (7) contact voltage drop by State-Inspect of High-Voltage Circuit circuit (4) so, in order to judge the off-state of test product (6), if voltage drop is greater than disconnecting the pressure drop ultimate value between contact, and the status signal of test product (6) open position is high level signal, the status signal of make-position is low level signal, do not transfinite trip time, then test product (6) disconnects normal, otherwise test product (6) fault, fault type is open failure.
If select simultaneously 1 ~ 6 test product or 1 ~ 4 test product that cooperates the frame size rated current to use at 400A～800A isolating switch that cooperates the frame size rated current to use at 63A～225A isolating switch, or 1 ~ 2 cooperation frame size rated current is when the test product of 1250A～1600A isolating switch use is tested simultaneously, all test products of then selecting move simultaneously, all test product actions once are denoted as test cycle and carry out once, can suspend test in the process of the test or withdraw from test, after the test cycle number of times that reaches setting or whole test product inefficacy, test will stop automatically.
The utility model is not addressed part and is applicable to prior art.
Claims (7)
1. electric operating mechanism of circuit-breaker reliability automatic test equipment, it is characterized by this device and be comprised of test control cabinet and product testing cabinet, test control cabinet comprises industrial computer, driving circuit, State-Inspect of High-Voltage Circuit circuit and motor-operating mechanism status monitoring circuit; Product testing cabinet comprises accessory power supply regulating circuit, test product, isolating switch and load circuit, and wherein, industrial computer links to each other with the State-Inspect of High-Voltage Circuit circuit with driving circuit, motor-operating mechanism status monitoring circuit respectively; Driving circuit links to each other with accessory power supply regulating circuit, test product, isolating switch respectively again; The accessory power supply regulating circuit links to each other with test product again; Test product links to each other with isolating switch with motor-operating mechanism status monitoring circuit respectively again; Isolating switch links to each other with load circuit with the State-Inspect of High-Voltage Circuit circuit again.
2. electric operating mechanism of circuit-breaker reliability automatic test equipment as claimed in claim 1, it is characterized by described isolating switch is breaker of plastic casing.
3. electric operating mechanism of circuit-breaker reliability automatic test equipment as claimed in claim 1, it is characterized by described test product for carrying out simultaneously 6 motor-operating mechanisms that cooperate the frame size rated current to use at 63A～225A isolating switch, or can carry out simultaneously 4 motor-operating mechanisms that cooperate the frame size rated current to use at 400A～800A isolating switch, or 2 motor-operating mechanisms that cooperate the frame size rated current to use at 1250A～1600A isolating switch.
4. electric operating mechanism of circuit-breaker reliability automatic test equipment as claimed in claim 1 is characterized by described driving circuit and comprises 16 DO unit, the first ac solid relay, the second ac solid relay, the 3rd ac solid relay, the first electromagnetic relay and the second electromagnetic relay; Its connected mode is that industrial computer passes through the DO data line and links to each other with 16 DO unit, 16 DO unit are by signal wire 201, signal wire 204 and signal wire 207 respectively with the first ac solid relay, the second ac solid relay links to each other with the input end of the 3rd ac solid relay, the output terminal of the first ac solid relay is by signal wire 202 controls the first electromagnetic relay, the output terminal of the second ac solid relay is by signal wire 205 controls the second electromagnetic relay, the output terminal of the 3rd ac solid relay is by signal wire 208 control A.C. contactors, the first electromagnetic relay is by signal wire 203 control test products, and the second electromagnetic relay is by signal wire 206 control isolating switchs.
5. electric operating mechanism of circuit-breaker reliability automatic test equipment as claimed in claim 1 is characterized by described motor-operating mechanism status monitoring circuit and comprises signal conditioning circuit, photoelectrical coupler, DI input circuit and the first data buffer; Its connected mode is test product mode bit voltage signal; Link to each other with signal conditioning circuit by signal wire, signal conditioning circuit links to each other with the input end of photoelectrical coupler by signal wire, the output terminal of photoelectrical coupler links to each other with the DI input circuit by signal wire, the DI input circuit links to each other with the first data buffer by signal wire, and the first data buffer links to each other with industrial computer by signal wire.
6. electric operating mechanism of circuit-breaker reliability automatic test equipment as claimed in claim 1 is characterized by described State-Inspect of High-Voltage Circuit circuit and comprises pressure filter circuit, A/D converter and the second data buffer; Its connected mode is that voltage signal links to each other with pressure filter circuit by signal wire between contact of breaker, and pressure filter circuit links to each other with A/D converter by signal wire, and A/D converter links to each other with the second data buffer by signal wire; The second data buffer links to each other with industrial computer respectively by the IO data line, and industrial computer links to each other with A/D converter by data line.
7. electric operating mechanism of circuit-breaker reliability automatic test equipment as claimed in claim 1, it is characterized by described accessory power supply regulating circuit and comprise electric voltage regulator, gear switch circuit, rectifier bridge and A.C. contactor, power source regulating circuit both can output AC voltage, again can output dc voltage; Its connected mode is that three-phase supply links to each other with the input end of electric voltage regulator by signal wire, the output terminal of electric voltage regulator links to each other with the gear switch circuit by signal wire, the gear switch circuit links to each other with A.C. contactor with rectifier bridge respectively by signal wire, rectifier bridge links to each other with A.C. contactor by signal wire, and driving circuit links to each other with A.C. contactor by signal wire simultaneously; Wherein said gear switch circuit is comprised of switch and electromagnetic relay.
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| CN 201220561936 CN202886562U (en) | 2012-10-30 | 2012-10-30 | Automatic reliability testing device for electric operating mechanisms of moulded case circuit breakers |
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| CN 201220561936 CN202886562U (en) | 2012-10-30 | 2012-10-30 | Automatic reliability testing device for electric operating mechanisms of moulded case circuit breakers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967825A (en) * | 2012-10-30 | 2013-03-13 | 河北工业大学 | Automatic reliability test device for electric operating mechanism of molded case circuit breaker and control method of device |
| CN106707155A (en) * | 2016-12-30 | 2017-05-24 | 中车长春轨道客车股份有限公司 | Small-capacity contactor acting characteristic test system and method |
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2012
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967825A (en) * | 2012-10-30 | 2013-03-13 | 河北工业大学 | Automatic reliability test device for electric operating mechanism of molded case circuit breaker and control method of device |
| CN102967825B (en) * | 2012-10-30 | 2015-02-18 | 河北工业大学 | Automatic reliability test device for electric operating mechanism of molded case circuit breaker and control method of device |
| CN106707155A (en) * | 2016-12-30 | 2017-05-24 | 中车长春轨道客车股份有限公司 | Small-capacity contactor acting characteristic test system and method |
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