CN100368819C - Reliability tester for electric leakage protector - Google Patents
Reliability tester for electric leakage protector Download PDFInfo
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- CN100368819C CN100368819C CNB2004100941459A CN200410094145A CN100368819C CN 100368819 C CN100368819 C CN 100368819C CN B2004100941459 A CNB2004100941459 A CN B2004100941459A CN 200410094145 A CN200410094145 A CN 200410094145A CN 100368819 C CN100368819 C CN 100368819C
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Abstract
The present invention relates to a reliability tester for a leakage protector, which is composed of a test control cabinet, a specimen cabinet and a conditioning box with a shifted operating mechanism, wherein the test control cabinet comprises an industrial computer, a contact state testing circuit and a leakage current regulating circuit; the specimen cabinet comprises a leakage protector specimen, a specimen handle operating mechanism and a drive circuit of a handle combining and separating brake. The present invention uses modular circuits, such as the industrial computer, the contact state testing circuit, a data acquisition circuit, etc. to automatically operate and test the handle operation of the leakage protector, the operation of the operating mechanism, the contact reliability of the contact and the reliability of leakage protection. The present invention solves the problems of how to use an industrial controller to control the operation of the combining and separating brake, accurately judge the real reliability level of an internal operating mechanism in the leakage protector and the electric connection in the operative process of the combining and separating brake, etc.
Description
Technical field:
The invention belongs to a kind of experiment detection device of earth leakage protective device, particularly a kind of reliability tester for electric leakage protector that electric equipment products is carried out fail-test.
Background technology:
Earth leakage protective device is to prevent in the low-voltage circuit that the person from getting an electric shock and the protection electric appliances of electric leakage fire.Earth leakage protective device is an actuating signal with the residual current, and cuts off circuit when residual current reaches certain numerical value, in order to avoid injure the person and burning apparatus.Yet produce and install the effect that insecure earth leakage protective device not only can not play safeguard protection, can cause the off one's guard of electricity consumption personnel on the contrary, cause electric shock accidents.China's earth leakage protective device poor reliability is suitable distinct issues, and carrying out the research that improves reliability is that China's electrical apparatus industry presses for a vital task of carrying out.About the research of the reliability of earth leakage protective device, practical assurance and the product quality and the reliability that improve domestic production producer had profound significance.
The research of relevant earth leakage protective device context of detection both at home and abroad all is the detections about the acting characteristics such as break of earth leakage protective device residue action current, residue non-operating current and earth leakage protective device.For earth leakage protective device, be still blank about the test unit of testing earth leakage protective device reliability level.
Content of the present invention:
The problem that solves:
In the present invention; solved the Several Key Problems of earth leakage protective device reliability: solved and how to have controlled closing/sub-switching operation of earth leakage protective device with industrial computer; and accurately judge closing/the sub-switching operation process in; earth leakage protective device built-in function mechanism and the real reliability level problem that is electrically connected and solved simultaneously in the earth leakage protective device testing process in temperature and humidity regulator; earth leakage protective device is applied desired action current and specified non-operating current; and the test button of operation test product; whether industrial computer test test product threads off; if thread off; by test unit finish automatically to test product reset promptly operate the reset button of earth leakage protective device after, the handle of earth leakage protective device is carried out closing operation.
Technical scheme of the present invention:
The invention provides a kind of reliability tester for electric leakage protector.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 earth leakage protective device and contact contact reliability and earth leakage protection reliability are operated automatically and tested.The handle operation mechanism 3 and the handle that have designed by many bench teat product of industrial computer 1 control close/separating brake driving circuit 2, and the handle of earth leakage protective device is carried out closing/sub-switching operation of flexibility; Accurately judge by contact state testing circuit 5 to close/the sub-switching operation process in, but earth leakage protective device inside closing/separating brake whether; Leakage current regulating circuit 7 scalable go out the desired action current and the specified non-operating current of earth leakage protective device; Shift-out type operating mechanism 6 can be finished the operation of the test button of test product in temperature and humidity regulator, if earth leakage protective device thread off, finish automatically to test product reset promptly operate the reset button of earth leakage protective device after, the handle of earth leakage protective device is carried out closing operation.
Reliability tester for electric leakage protector, by test control cabinet, product testing cabinet, the temperature and humidity regulator that has shift-out type operating mechanism is formed; Test control cabinet comprises industrial computer 1 and contact state testing circuit 5 and leakage current regulating circuit 7; Product testing cabinet comprises that earth leakage protective device test product 4, test product handle operation mechanism 3 and handle close/separating brake driving circuit 2; It connects control mode: and industrial computer 1 closes with handle respectively/and separating brake driving circuit 2, contact state testing circuit 5, shift-out type operating mechanism 6 link to each other with leakage current regulating circuit 7; Earth leakage protective device test product 4 links to each other with contact state testing circuit 5, handle operation mechanism 3 respectively; Handle operation mechanism 3 closes with handle/and separating brake driving circuit 2 links to each other; Leakage current regulating circuit 7 links to each other with shift-out type operating mechanism 6.
Handle closes/and 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; Its connection and control mode are 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 earth leakage protective device 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 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 511 again, form the signal controlling loop.
Leakage current regulating circuit 7 comprises by experiment power supply 60, step-down transformer 61, electric voltage regulator 62, test resistance 64 and AD converter 63; Its connected mode is: experiment power supply 60 is connected with step-down transformer 61, electric voltage regulator 62 successively, and wherein electric voltage regulator 62 links to each other with the test product earth leakage protective device with test resistance 64 successively; Earth leakage protective device links to each other with electric voltage regulator 62 and forms the loop; AD converter 63 links to each other with test resistance 64; Industrial computer 1 links to each other with electric voltage regulator 62 with AD converter 63 respectively.
Shift-out type operating mechanism 6 comprises that handle closes/separating brake driving circuit, the operating mechanism of test button, the operating mechanism of reset button; Second handle in the shift-out type operating mechanism closes/and separating brake driving circuit 71 closes with handle/and the circuit of separating brake driving circuit 2 is identical, promptly comprises 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 earth leakage protective device 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; The operating mechanism of test button, the operating mechanism of reset button adopt identical circuit to connect, main element is all solenidal electromagnet 82 and photoelectrical coupler 81, its connected mode is: industrial computer 1 links to each other with photoelectrical coupler 81, and the 220V power supply links to each other with the coil of solenidal electromagnet 82 and the output terminal of photoelectrical coupler 81 respectively.
The present invention compared with prior art has following main beneficial effect:
1. test unit can automatically, accurately be finished the reliability testing of earth leakage protective device by industrial computer control.
2. have many hard-wired handle operation mechanisms, can be automatically model one pole commonly used and multipole earth leakage protective device be carried out handle and close/sub-switching operation.
3. test unit can be simultaneously carries out the detection of voltage between contact drop and breaking-off contact to every pair of contact of many earth leakage protective devices.
4. have many movable operation mechanisms, can protect earth leakage protection to detect to model one pole commonly used and multipole earth leakage protective device simultaneously;
5. test unit can produce the sinusoidal wave test current (leakage current of earth leakage protective device commonly used is in 0-500mA) that can adjust size by the leakage current regulating circuit in the 0-500mA scope;
6. test unit can be to the test button of earth leakage protective device, and mechanism operates automatically by movable operation;
7. if thread off when the earth leakage protective device test product protects earth leakage protection to detect, test unit can automatically reset to test product, promptly operate reset button after, carry out the test product closing operation.
Description of drawings:
Fig. 1 is the reliability tester for electric leakage protector theory diagram;
Fig. 2 is that handle closes/separating brake driving circuit theory diagram;
Fig. 3 is a contact state testing circuit theory diagram;
Fig. 4 is a leakage current regulating circuit theory diagram;
Fig. 5 is the schematic block circuit diagram of shift-out type operating mechanism;
Fig. 6 is that handle closes/separating brake driving circuit figure;
Fig. 7 is reset button, test button operating mechanism circuit diagram;
Fig. 8 is the connecting circuit figure of earth leakage protective device leakage current regulating circuit;
Fig. 9 is a reliability tester for electric leakage protector fail-test software flow pattern.
The specific embodiment of the present invention is as follows:
Embodiment:
Reliability tester for electric leakage protector, by test control cabinet, product testing cabinet, the temperature and humidity regulator that has shift-out type operating mechanism is formed; Test control cabinet comprises that industrial computer 1 is hereinafter to be referred as industrial computer and contact state testing circuit 5 and leakage current regulating circuit 7; Product testing cabinet comprises that earth leakage protective device test product 4, test product handle operation mechanism 3 and handle close/separating brake driving circuit 2; It connects control mode: and industrial computer 1 closes with handle respectively/and separating brake driving circuit 2, contact state testing circuit 5, shift-out type operating mechanism 6 link to each other with leakage current regulating circuit 7; Earth leakage protective device test product 4 links to each other with contact state testing circuit 5, handle operation mechanism 3 respectively; Handle operation mechanism 3 closes with handle/and separating brake driving circuit 2 links to each other; Leakage current regulating circuit 7 links to each other with shift-out type operating mechanism 6.
Handle closes/and 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; Its connection and control mode are 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 earth leakage protective device 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 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 511 again, form the signal controlling loop.
Leakage current regulating circuit 7 comprises by experiment power supply 60, step-down transformer 61, electric voltage regulator 62, test resistance 64 and AD converter 63; Its connected mode is: experiment power supply 60 is connected with step-down transformer 61, electric voltage regulator 62 successively, and wherein electric voltage regulator 62 links to each other with the test product earth leakage protective device with test resistance 64 successively; Earth leakage protective device links to each other with electric voltage regulator 62 and forms the loop; AD converter 63 links to each other with test resistance 64; Industrial computer 1 links to each other with electric voltage regulator 62 with AD converter 63 respectively.
Shift-out type operating mechanism 6 comprises that handle closes/separating brake driving circuit, the operating mechanism of test button, the operating mechanism of reset button; Second handle in the shift-out type operating mechanism closes/and separating brake driving circuit 71 closes with handle/and the circuit of separating brake driving circuit 2 is identical, promptly comprises 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 earth leakage protective device 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; The operating mechanism of test button, the operating mechanism of reset button adopt identical circuit to connect, main element is all solenidal electromagnet 82 and photoelectrical coupler 81, its connected mode is: industrial computer 1 links to each other with photoelectrical coupler 81, and the 220V power supply links to each other with the coil of solenidal electromagnet 82 and the output terminal of photoelectrical coupler 81 respectively.
Reliability tester for electric leakage protector carries out fail-test under industrial computer control, its test run program is:
1. open the test control cabinet experiment power supply, start Industrial Control Computer, enter test routine; Select following test operation;
1) test product information input: enter corresponding function, the technical parameter of input test product, test sequence numbers etc. are to the descriptor of test product;
2) input of test parameters and modification: input or modification are as operating frequency, and the test period etc. are tested required parameter;
3) file processing: the information of checking or depositing in addition document form storage test test product;
4) test initialization: finish the preparation before on-test, as set up the file that test figure is stored;
5) operational reliability test;
6) earth leakage protection fail-test;
2. reselect test operation, or withdraw from test operation.
Software flow pattern as shown in Figure 9.
Wherein, test run program 5), when carrying out the operational reliability test, the specific operation process of its test is as follows:
In Fig. 2, at first industrial computer 1 by handle close/2 pairs of test products of separating brake driving circuit carry out closing operation: 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 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 the electric signal status signal that puts in place that closes a floodgate, after this signal is isolated through signal wire 222 and by 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, photoelectrical coupler 22, signal wire 212 is passed to motor, motor is stopped, thereby the handle of test product 4 is remained on the position of combined floodgate.Handle closes/and separating brake driving circuit 2 circuit diagrams are as shown in Figure 6.
In Fig. 3, 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, industrial computer 1 through bidirectional signal line 500, data collector 51, signal wire 502 with the contact voltage reference threshold value set according to correlation standard, U falls in the contact loop voltage of closed contact
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 value of stipulating in the test should be the contact ultimate value and is sent in the data buffer 52, isolate by 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 provided by the load circuit in the load cabinet 6 through the voltage signal that signal wire 507 is sent to another input end test product contact two ends of voltage comparator 56; Two signals compare through over-voltage comparator 56, logic level signal relatively is through signal wire 508, photoelectrical coupler 57,, signal wire 509 is sent to selected data register 58, after signal wire 510, 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 value; When actual contact voltage drop value during, loose contact is described, otherwise contact is good greater than the benchmark threshold value; 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 voltage U between the state 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 is 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, or select the operation of test operation fail-test to stop.Test run program 6); to two earth leakage protective devices as shown in Figure 5: carry out the earth leakage protection fail-test on the shift-out type operating mechanism 6 in temperature and humidity regulator; whether the test button operation that detects test product is normal, and whether test product threads off when applying rated residual operating current or specified electric leakage non-operating current.Whether the test button operation that detects test product is normal.As shown in Figure 7: send operation signal by software control industrial computer 1 and behind photoelectrical coupler 81, be transferred to the coil of solenidal electromagnet 82 and the electric loop of experiment power supply; the adhesive and the release of the break-make control solenidal electromagnet 82 of coil power, solenidal electromagnet 82 is finished the test button of earth leakage protective device or the operation of reset button.Industrial computer 1 control 4 solenidal electromagnets, the i.e. test button and the reset button of two earth leakage protective devices of may command.When the test button of solenidal electromagnet coil electricity operation earth leakage protective device, earth leakage protective device should be threaded off, if do not thread off, then industrial computer judges that earth leakage protective device lost efficacy.Industrial computer record testing result.Whether detect test product threads off when applying rated residual operating current or specified electric leakage non-operating current; as shown in Figure 4: experiment power supply 60 is after step-down transformer 61 step-downs; be connected with electric voltage regulator 62, electric voltage regulator 62 links to each other with the test product earth leakage protective device by test resistance 64.Industrial computer 1 links to each other with AD converter 63 and electric voltage regulator.AD converter 63 links to each other with test resistance 64, the ohmically magnitude of voltage of collecting test, be calculated to be the size of loop current and the current value ratio that sets in advance with industrial computer 1.Regulate the direction switch of electric voltage regulator, the size of regulating loop electric current by industrial computer 1.The circuit diagram of leakage current regulating circuit 7 as shown in Figure 8.Final leakage current regulating circuit 7 is subjected to industrial computer 1 regulating and controlling to go out the rated residual operating current of test product.The voltage of the test resistance that a flow through phase of test product of gained electric current, industrial computer 1 are gathered by AD converter 63 can detect the state of test product.Test product should be threaded off, otherwise the test product inefficacy, industrial computer record result, after test product was threaded off, shift-out type operating mechanism 6 was finished resetting of test product.The operation signal of industrial computer 1 is transferred to the coil of solenidal electromagnet behind photoelectrical coupler, thereby the operation to the reset button of earth leakage protective device is finished in the adhesive of control solenidal electromagnet, is closed/handle of the closed test product of separating brake driving circuit by handle again.Can carry out test product operation next time.The same procedure scalable goes out the specified electric leakage non-operating current test product of test product should not thread off, otherwise industrial computer 1 judges that test product lost efficacy, industrial computer record result.When test reached the test period of setting, the earth leakage protection fail-test of test product finished.
Claims (5)
1. a reliability tester for electric leakage protector is characterized by by test control cabinet, product testing cabinet, and the temperature and humidity regulator that has shift-out type operating mechanism is formed; Test control cabinet comprises industrial computer (1), is called for short industrial computer and contact state testing circuit (5) and leakage current regulating circuit (7); Product testing cabinet comprises that earth leakage protective device test product (4), test product handle operation mechanism (3) and handle close/separating brake driving circuit (2); It connects control mode: and industrial computer (1) closes with handle respectively/and separating brake driving circuit (2), contact state testing circuit (5), shift-out type operating mechanism (6) link to each other with leakage current regulating circuit (7); Earth leakage protective device test product (4) links to each other with contact state testing circuit (5), handle operation mechanism (3) respectively; Handle operation mechanism (3) closes with handle/and separating brake driving circuit (2) links to each other; Leakage current regulating circuit (7) links to each other with shift-out type operating mechanism (6).
2. according to the described reliability tester for electric leakage protector 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); Its connection and control mode are 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 earth leakage protective device 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) by signal wire (222), second photoelectrical coupler (25) links to each other with the input interface of data imput output circuit (21) by signal wire (221) again.
3. according to the described reliability tester for electric leakage protector 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); 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), second data buffer (52) connects the 3rd photoelectrical coupler (53) through signal wire (503) again, the 3rd photoelectrical coupler (53) connects digital to analog converter (54) through signal wire (504), digital to analog converter (54) connects voltage amplifier (55) through signal wire (505) again, voltage amplifier (55) connects 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), the 4th photoelectrical coupler (57) connects data register (58) through signal wire (509) again, data register (58) connects first data buffer (59) through signal wire (510) again, first data buffer (59) connects data collector (51) through signal wire (511) again, forms the signal controlling loop.
4. according to the described reliability tester for electric leakage protector of claim 1, it is characterized by leakage current regulating circuit (7) and comprise experiment power supply (60), step-down transformer (61), electric voltage regulator (62), test resistance (64) and AD converter (63); Its connected mode is: experiment power supply (60) is connected with step-down transformer (61), electric voltage regulator (62) successively, and wherein electric voltage regulator (62) links to each other with test resistance (64), test product earth leakage protective device successively; The test product earth leakage protective device links to each other with electric voltage regulator (62) and forms the loop; AD converter (63) links to each other with test resistance (64); Industrial computer (1) links to each other with electric voltage regulator (62) with AD converter (63) respectively.
5. according to the described reliability tester for electric leakage protector of claim 1, it is characterized by shift-out type operating mechanism (6) and comprise that second handle closes/separating brake driving circuit, the operating mechanism of test button, the operating mechanism of reset button; Second handle in the shift-out type operating mechanism closes/and separating brake driving circuit (71) closes with handle/and the circuit of separating brake driving circuit (2) is identical, promptly comprises 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 earth leakage protective device 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) by signal wire (222), second photoelectrical coupler (25) links to each other with the input interface of data imput output circuit (21) by signal wire (221) again; The operating mechanism of test button, the operating mechanism of reset button adopt identical circuit to connect, main element is all solenidal electromagnet (82) and photoelectrical coupler (81), its connected mode is: industrial computer (1) links to each other with photoelectrical coupler (81), and the 220V power supply links to each other with the coil of solenidal electromagnet (82) and the output terminal of photoelectrical coupler (81) respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100941459A CN100368819C (en) | 2004-12-31 | 2004-12-31 | Reliability tester for electric leakage protector |
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| CNB2004100941459A CN100368819C (en) | 2004-12-31 | 2004-12-31 | Reliability tester for electric leakage protector |
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| CN100368819C true CN100368819C (en) | 2008-02-13 |
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| CN102062823B (en) * | 2009-11-17 | 2013-07-31 | 张朝 | Electric leakage protection device tester |
| CN103913659B (en) * | 2014-03-30 | 2017-02-15 | 河北工业大学 | instantaneous protection tester and operation method thereof |
| CN103926488A (en) * | 2014-04-04 | 2014-07-16 | 苏州工业职业技术学院 | System for testing electric leakage protector |
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| CN106353615A (en) * | 2016-08-30 | 2017-01-25 | 中山市开普电器有限公司 | PRCD (portable residual current device) service life testing device |
| CN110456262A (en) * | 2019-08-02 | 2019-11-15 | 上海电器科学研究所（集团）有限公司 | Band residual current protecting function automatic closing detection device for circuit breaker and test method |
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|---|---|---|---|---|
| SU792440A1 (en) * | 1978-10-19 | 1980-12-30 | Пермский политехнический институт | Device for protecting shaft contact dc system from current leakage |
| CN87207689U (en) * | 1987-05-05 | 1988-10-12 | 张明 | Leakage protector |
| CN2414422Y (en) * | 2000-02-24 | 2001-01-10 | 天津天马线缆实业总公司 | Multi-purpose leakage protector tester |
| CN2807272Y (en) * | 2004-12-31 | 2006-08-16 | 河北工业大学 | Earth leakage protective device reliability test apparatus |
-
2004
- 2004-12-31 CN CNB2004100941459A patent/CN100368819C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU792440A1 (en) * | 1978-10-19 | 1980-12-30 | Пермский политехнический институт | Device for protecting shaft contact dc system from current leakage |
| CN87207689U (en) * | 1987-05-05 | 1988-10-12 | 张明 | Leakage protector |
| CN2414422Y (en) * | 2000-02-24 | 2001-01-10 | 天津天马线缆实业总公司 | Multi-purpose leakage protector tester |
| CN2807272Y (en) * | 2004-12-31 | 2006-08-16 | 河北工业大学 | Earth leakage protective device reliability test apparatus |
Non-Patent Citations (2)
| Title |
|---|
| 剩余电流动作保护器的可靠性研究. 刘帼巾.博士学位论文. 2002 * |
| 漏电保护器的可靠性研究. 刘帼巾，陆俭国，李志刚.低压电器，第5期. 2001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1645159A (en) | 2005-07-27 |
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Assignee: Huyu Group Co., Ltd. Assignor: Hebei University of Technology Contract fulfillment period: 2009.3.1 to 2015.12.31 contract change Contract record no.: 2009120000032 Denomination of invention: Reliability tester for electric leakage protector Granted publication date: 20080213 License type: Exclusive license Record date: 2009.4.29 |
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