CN102608488A - Mine on-line leakage monitoring module - Google Patents
Mine on-line leakage monitoring module Download PDFInfo
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Abstract
The invention relates to a mine on-line leakage monitoring module, which belongs to the technical field of mine on-line leakage monitoring circuits. The technical problem to be solved is to provide the on-line leakage monitoring module for underground 3300V voltage-class electric circuits of coal mines. In the adopted technical scheme, the mine on-line leakage monitoring module comprises a power circuit, a detected signal input circuit, an optoelectronic isolation, a logic judgement circuit, a relay output drive circuit and a status indication circuit, and the detected signal input circuit is connected with a leakage monitoring port. A high-power range design is adopted to ensure that the mine on-line leakage monitoring module can be normally used under harsh environments; the power end, the signal detection end and the signal output end are completely isolated from one another, consequently, the interference-inhibiting function is strong, misoperation can be prevented, and the safety of a system can be guaranteed; monitoring signals and alarm signals can be simultaneously outputted, so that monitoring integration is realized; and the mine on-line leakage monitoring module is applicable to the field of coal mines.
Description
Technical field
Online leakage current detect module that the present invention is mining belongs to mining online leakage current detect circuit engineering field.
Background technology
Safety all is first requirement for any industrial environment, for the subsurface environment of colliery, and gas, coal dust, fire, water, roof pressure, dynamo-electric accident is topmost six major break down reasons; And for these accidents, except water and roof pressure, dynamo-electric accident, first three items is the most dangerous, all can cause the explosion of coal mines accident, and its reason all causes owing to electric spark; And because the caused electric spark of electric leakage accounts for very big ratio; And for personal security, because the working environment of down-hole is special, the space is narrow and small, humidity, and vibration is big, and high humidity is very easy to cause casualties because of electric leakage.
For the generation root that prevents electric spark and the injury of electric leakage to operating personnel, the supply transformer neutral point under the national regulation coal mine can not ground connection, just the powered operation mode of our said isolated neutral; And industry, folk power supply mode are generally the transformer neutral point direct grounding way on the ground; On the other hand, because the power supply voltage level under the coal mine is 1140V and 3300V, this special power supply mode in colliery and electric pressure have determined mining electric product and general industry occasion not general; And function is special; Along with improving constantly of China's coal mines per-well production, the electric pressure of original 1140V can not satisfy the needs of the high-yield and high-efficiency in colliery, and power supply voltage level all need be to transition of 3300V electric pressure and transformation; The development of at present domestic electrical equipment for the 3300V electric pressure; Basically be in the incipient stage, need the problem of solution also a lot, particularly the online leakage current detect of the electric wiring under the coal mine and line security control problem are badly in need of solving.
Summary of the invention
The present invention overcomes the deficiency that prior art exists; Technical matters to be solved is: a kind of online leakage current detect module of electric wiring that is used for 3300V electric pressure under the coal mine is provided; Be applicable to the state of insulation of long term monitoring circuit, protection circuit equipment and personal safety.
For solving the problems of the technologies described above; The technical scheme that the present invention adopted is: mining online leakage current detect module comprises: power circuit, the detection signal input circuit that links to each other with the leakage current detect port, photoelectric isolating circuit, logic judging circuit, relay output driving circuit and condition indication circuit;
The power output end 1.1,1.3 of said power circuit links to each other with the power input 2.1,2.3 of detection signal input circuit respectively; The control end 1.2 of power circuit links to each other with the feedback end 2.2 of detection signal input circuit; The power output end 1.4,1.5,1.6 of power circuit links to each other with the input end 3.3,3.2,3.1 of photoelectric isolating circuit respectively; The signal output part 2.4 of detection signal input circuit links to each other with the signal input part 3.4 of photoelectric isolating circuit; The output terminal 3.5,3.6 of photoelectric isolating circuit links to each other with the input end 4.1,4.2 of logic judging circuit respectively; The output terminal 4.5,4.6 of logic judging circuit links to each other with the input end 5.1,5.2 of relay output driving circuit respectively, and the output terminal 5.5,5.6,5.7,5.8 of relay output driving circuit links to each other with the input end 6.1,6.2,6.3,6.4 of condition indication circuit respectively;
The input end 4.3 of said logic judging circuit and input end 5.4 back of succeeding the electrical equipment output driving circuit link to each other with the power output end 1.6 of power circuit, and the input end 5.3 of said relay output driving circuit and the input end 6.5 that connects condition indication circuit then link to each other with the output terminal 3.5 of photoelectric isolating circuit.
The circuit structure of said power circuit is: the first siding ring of transformer T1 links to each other with power supply; The second siding ring of transformer T1 comprises first coil, second coil and tertiary coil, and the output terminal of said first coil, second coil and tertiary coil links to each other with the input end of the first rectification circuit D1, the second rectification circuit D6 and the 3rd rectification circuit D7 respectively;
The output head anode of the said first rectification circuit D1 and connect the collector of an end and NPN type triode Q2 of negative pole, resistance R 12 of positive pole, the diode D5 of an end, the capacitor C 3 of capacitor C 6 after link to each other with the collector of NPN type triode Q1; The other end of resistance R 12 and connect the negative pole of voltage stabilizing diode D3 after link to each other with the base stage of NPN type triode Q2; Link to each other with the base stage of NPN type triode Q1 behind the emitter of NPN type triode Q2 and the end of connecting resistance R9; Link to each other with an end of resistance R 1 behind the emitter of NPN type triode Q1 and the other end of connecting resistance R9; The other end of said resistance R 1 and connect an end of capacitor C 30 after link to each other with input end that three ends can be aligned voltage stabilizer U1; The other end of said capacitor C 30 links to each other with an end of resistance R 24; Three ends link to each other with the power output end 1.1 of power circuit after can aligning the output terminal of voltage stabilizer U1 and connecing the end of an end and resistance R 16 of an end of the positive pole of the positive pole of voltage stabilizing diode D3, diode D5, capacitor C 7, resistance R 8, and the control end that three ends can be aligned voltage stabilizer U1 links to each other with the control end 1.2 of power circuit; The negative pole of output end of the first rectification circuit D1 and connect the other end of the other end and resistance R 16 of the other end, resistance R 8 of negative pole, the capacitor C 7 of the other end, the capacitor C 3 of capacitor C 6 after link to each other with the power output end 1.3 of power circuit;
The output head anode of the said second rectification circuit D6 and connect the end of positive pole and capacitor C 11 of capacitor C 9 after link to each other with the input end of three terminal regulator U2; The output terminal of said three terminal regulator U2 and the anodal back that connects an end and the capacitor C 10 of capacitor C 12 link to each other with the power output end 1.4 of power circuit, the negative pole of output end of the second rectification circuit D6 and connect the other end of negative pole and resistance R 24 of the other end, capacitor C 10 of earth terminal, the capacitor C 12 of the other end, the three terminal regulator U2 of negative pole, the capacitor C 11 of capacitor C 9 after link to each other with the power output end 1.5 of power circuit;
The output head anode of said the 3rd rectification circuit D7 and connect the end of positive pole and capacitor C 15 of capacitor C 14 after link to each other with the input end of three terminal regulator U3; The output terminal of said three terminal regulator U3 and connect the end of positive pole and capacitor C 16 of capacitor C 13 after link to each other with the power output end 1.6 of power circuit, the negative pole of output end of the 3rd rectification circuit D7 and connect the other end of negative pole and capacitor C 16 of earth terminal, capacitor C 13 of the other end, the three terminal regulator U3 of negative pole, the capacitor C 15 of capacitor C 14 after ground connection.
The circuit structure of said detection signal input circuit is: link to each other with the power end anodal 2.1 of detection signal input circuit behind the end of the negative pole of an end of resistance R 7 and the end of connecting resistance R11, diode D2, an end of resistance R 10 and resistance R 2; The other end of said resistance R 11 links to each other with an end of capacitor C 8; Link to each other with the feedback end 2.2 of detection signal input circuit behind the end of the anodal and connecting resistance R13 of diode D2; Link to each other with the stiff end of slide rheostat R19 behind the other end series resistor R14 of resistance R 13, the other end of said resistance R 7 and connect the end of another stiff end and resistance R 20 of sliding end, slide rheostat R19 of the other end, the slide rheostat R19 of capacitor C 8 after link to each other with the power input 2.3 of detection signal input circuit;
Link to each other with the signal output part 2.4 of detection signal input circuit behind the other end series resistor R17 of said resistance R 10;
The other end of said resistance R 2 series resistor R3, resistance R 4, resistance R 5 and resistance R 6 backs successively links to each other with the detection signal input anode 2.5 of detection signal input circuit; The other end of said resistance R 20 links to each other with an end of resistance R 22, links to each other with the detection signal input cathode 2.6 of detection signal input circuit behind the end of the end of the other end of resistance R 22 and connecting resistance R15, an end of capacitor C 4 and capacitor C 5;
The other end of resistance R 15 series resistor R18 and capacitor C 1 back successively links to each other with line between resistance R 2 and the resistance R 3; The other end of capacitor C 4 links to each other with line between resistance R 3 and the resistance R 4; The other end of capacitor C 5 links to each other with line between resistance R 5 and the resistance R 6; One end of capacitor C 2 and capacitor C 1 link to each other with line between the resistance R 18, and the other end of capacitor C 2 links to each other with line between resistance R 4 and the resistance R 5.
The circuit structure of said photoelectric isolating circuit is: link to each other with the power input 3.1 of photoelectric isolating circuit behind the 6 pin series resistor R28 of HCNR200 chip U5,6 pin of HCNR200 chip U5,5 pin are respectively the output terminal 3.5,3.6 of photoelectric isolating circuit;
Link to each other with the power input 3.3 of photoelectric isolating circuit behind 8 pin of LM258A chip U4 and the end of connecting resistance R25; The other end of said resistance R 25 links to each other with 2 pin of HCNR200 chip U5; One end of resistance R 27 and connect an end of capacitor C 18 after link to each other with the signal input part 3.4 of photoelectric isolating circuit; The other end of resistance R 27 links to each other with 3 pin of LM258A chip U4, the other end of capacitor C 18 and connect 4 pin of collector and HCNR200 chip U5 of 5 pin, positive-negative-positive triode Q4 of 4 pin, the LM258A chip U4 of LM258A chip U4 after link to each other with the power input 3.2 of photoelectric isolating circuit;
2 pin of said LM258A chip U4 link to each other with 1 pin; Be serially connected with resistance R 26 between 1 pin of LM258A chip U4 and 6 pin; 6 pin of LM258A chip U4 and connect an end of capacitor C 17 after link to each other with 3 pin of HCNR200 chip U5; 7 pin of LM258A chip U4 and connect the other end of capacitor C 17 after link to each other with the base stage of positive-negative-positive triode Q4, the emitter of positive-negative-positive triode Q4 links to each other with 1 pin of HCNR200 chip U5.
The circuit structure of said logic judging circuit is: an end of resistance R 40 and connect the end of an end and resistance R 61 of capacitor C 25 after link to each other with the input end 4.2 of logic judging circuit, the other end of said resistance R 40 links to each other with 10 pin of LM2902N chip U7; One end of capacitor C 24 and connect the end of negative pole, resistance R 59 of adjustable voltage stabilizing diode U9 after link to each other with the input end 4.1 of logic judging circuit; Link to each other with the control end of adjustable voltage stabilizing diode U9 behind the end of the other end of said resistance R 59 and connecting resistance R62;
8 pin of said LM2902N chip U7 link to each other with 9 pin; Be serially connected with resistance R 46 between 8 pin of LM2902N chip U7 and 3 pin; Be serially connected with resistance R 21 between 1 pin of LM2902N chip U7 and 5 pin, link to each other with an end of resistance R 65 behind the end of 2 pin of LM2902N chip U7 and the end of connecting resistance R57 and capacitor C 20; The other end of said resistance R 57 links to each other with a stiff end of slide rheostat resistance R 55; Link to each other with an end of resistance R 43 behind the other end of capacitor C 20 and the sliding end that meets slide rheostat R55 and another stiff end, the other end of resistance R 43 links to each other with 12 pin of LM2902N chip U7;
4 pin of said LM2902N chip U7 link to each other with the power input 4.3 of logic judging circuit; 6 pin of LM2902N chip U7 and connect the end of an end and resistance R 39 of capacitor C 23 after link to each other with an end of resistance R 34; 7 pin of LM2902N chip U7 and connect the other end of the other end and resistance R 39 of capacitor C 23 after link to each other with an end of resistance R 60, the other end of said resistance R 60 is the signal output part 4.4 of logic judging circuit;
13 pin of said LM2902N chip U7 and connect the end of an end and resistance R 58 of capacitor C 21 after link to each other with an end of resistance R 66; Link to each other with an end of resistance R 36 behind the other end of the other end of capacitor C 21 and connecting resistance R58, the other end of said resistance R 36 is the signal output part 4.6 of logic judging circuit; 14 pin of LM2902N chip U7 link to each other with an end of resistance R 47, and the other end of said resistance R 47 is the signal output part 4.5 of logic judging circuit;
Ground connection behind the other end of the other end of the positive pole of the other end of the other end of the other end of said capacitor C 25 and connecting resistance R61, capacitor C 24, TL431I chip U9, the other end of resistance R 62, resistance R 65, the other end of resistance R 34, resistance R 66 and 11 pin of LM2902N chip U7.
The circuit structure of said relay output driving circuit is: an end of resistance R 30 links to each other with the input end 5.3 of relay output driving circuit; Link to each other with an end of resistance R 41 behind the end of the other end of resistance R 30 and connecting resistance R53 and the end of resistance R 35; Link to each other with an end of resistance R 68 behind the end of the other end of said resistance R 53 and connecting resistance R48, the other end of resistance R 48 links to each other with 6 pin of LM2901 chip U6; The other end of resistance R 35 links to each other with 11 pin of LM2901 chip U6, and the other end of resistance R 41 links to each other with 9 pin of LM2901 chip U6;
7 pin of said LM2901 chip U6,3 pin, 4 pin link to each other with the input end 5.2,5.4,5.1 of relay output driving circuit respectively; Link to each other with an end of resistance R 50 behind 5 pin of LM2901 chip U6 and the end of connecting resistance R29; Link to each other with the output terminal 5.5 of relay output driving circuit behind the end of the other end of said resistance R 50 and connecting resistance R67,2 pin with LM2901 chip U6 behind the end of the other end of resistance R 29 and connecting resistance R31 link to each other;
Link to each other with the input end 5.4 of relay output driving circuit behind the end of the other end of said resistance R 31 and connecting resistance R32 and the end of inductance L 1; The other end of resistance R 32 links to each other with 13 pin of LM2901 chip U6; The other end of inductance L 1 and connect the negative pole of diode D8 after link to each other with an end of the coil of relay K 1,13 pin of said LM2901 chip U6 are the output terminal 5.6 of relay output driving circuit;
8 pin of said LM2901 chip U6 and connect an end of capacitor C 22 after link to each other with an end of resistance R 49, the other end of said resistance R 49 is the output terminal 5.7 of relay output driving circuit; Be serially connected with resistance R 38 between 1 pin of said LM2901 chip U6 and 10 pin; Be serially connected with resistance R 37 between 9 pin of LM2901 chip U6 and 14 pin; Link to each other with an end of resistance R 33 behind 14 pin of LM2901 chip U6 and the end of connecting resistance R42; The other end of said resistance R 33 is the output terminal 5.8 of relay output driving circuit; The other end of said resistance R 42 and connect an end of capacitor C 19 after link to each other with the base stage of NPN type triode Q6, the collector of said NPN type triode Q6 and the other end of coil that connects anodal back and the relay K 1 of diode D8 link to each other;
The other end of said resistance R 68 is ground connection successively and behind the other end of the other end of 12 pin of the other end of connecting resistance R67, LM2901 chip U6, capacitor C 22, capacitor C 19 and behind the emitter of NPN type triode Q6.
The circuit structure of said condition indication circuit is: said light emitting diode D14 anodal and connect the end of an end and resistance R 82 of positive pole, resistance R 76 of a stiff end, the diode D13 of slide rheostat R74 after link to each other with the input end 6.4 of condition indication circuit; The negative pole of said light emitting diode D14 links to each other with an end of resistance R 85; The other end of said resistance R 85 and connect 3 pin of conversion switch S 1 after ground connection, another stiff end of said slide rheostat R74 and connect the negative pole of sliding end and diode D13 of slide rheostat R74 after link to each other with the input end 6.5 of condition indication circuit;
The other end of said resistance R 76 links to each other with the collector of NPN type triode Q10; Collector with NPN type triode Q9 behind the end of the other end of resistance R 82 and connecting resistance R75 links to each other; Link to each other with the base stage of NPN type triode Q10 behind the other end serial connection light emitting diode D12 of said resistance R 75, link to each other with the input end 6.1 of condition indication circuit behind the base stage series resistor R83 of said NPN type triode Q9;
Two light emitting diode lamp D15, D16, D17, D18's is one anodal and connect the back and link to each other with the emitter of NPN type triode Q10; Another of the above-mentioned couple of light emitting diode lamp D15, D16, D17, D18 is anodal and connect the back and link to each other with the emitter of NPN type triode Q9, and the negative pole of two light emitting diode lamp D15, D16, D17, D18 links to each other with 6 pin, 7 pin, 9 pin, 10 pin of switch S1 respectively;
The end of resistance R 86, R87, R88, R89 and connect the back link to each other with the input end 6.2 of condition indication circuit; The other end of resistance R 86, R87, R88, R89 links to each other with the stiff end of slide rheostat R77, R80, R79, R78 respectively, another stiff end of above-mentioned slide rheostat R77, R80, R79, R78 and connect sliding end separately after link to each other with 5 pin, 4 pin, 2 pin, 1 pin of switch S1 respectively; 8 pin of said switch S1 link to each other with the input end 6.3 of condition indication circuit.
The beneficial effect that the present invention compared with prior art has is: the present invention adopts high power range design, guarantees under rugged surroundings, can normally use; Power end, input end and signal output part three isolate fully, disturb inhibit feature stronger, can prevent faulty operation, guarantee the security of system; Pilot signal and alerting signal are exported simultaneously, realize that monitoring is integrated, and accuracy of detection is high, and the reaction time is fast, and security is good.
Description of drawings
Do further detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the electrical block diagram of power circuit.
Fig. 3 is the electrical block diagram of the detection signal input circuit that links to each other with the leakage current detect port.
Fig. 4 is the electrical block diagram of photoelectric isolating circuit.
Fig. 5 is the electrical block diagram of logic judging circuit.
Fig. 6 is the electrical block diagram of relay output driving circuit.
Fig. 7 is the electrical block diagram of condition indication circuit.
Fig. 8 is the application circuit structural representation of the detection signal input circuit that links to each other with the leakage current detect port.
Embodiment
As shown in Figure 1, online leakage current detect module that the present invention is mining comprises: power circuit 1, the detection signal input circuit 2 that links to each other with the leakage current detect port, photoelectric isolating circuit 3, logic judging circuit 4, relay output driving circuit 5 and condition indication circuit 6;
The power output end 1.1,1.3 of said power circuit 1 links to each other with the power input 2.1,2.3 of detection signal input circuit 2 respectively; The control end 1.2 of power circuit 1 links to each other with the feedback end 2.2 of detection signal input circuit 2; The power output end 1.4,1.5,1.6 of power circuit 1 links to each other with the input end 3.3,3.2,3.1 of photoelectric isolating circuit 3 respectively; The signal output part 2.4 of detection signal input circuit 2 links to each other with the signal input part 3.4 of photoelectric isolating circuit 3; The output terminal 3.5,3.6 of photoelectric isolating circuit 3 links to each other with the input end 4.1,4.2 of logic judging circuit 4 respectively; The output terminal 4.5,4.6 of logic judging circuit 4 links to each other with the input end 5.1,5.2 of relay output driving circuit 5 respectively, and the output terminal 5.5,5.6,5.7,5.8 of relay output driving circuit 5 links to each other with the input end 6.1,6.2,6.3,6.4 of condition indication circuit 6 respectively;
The input end 4.3 of said logic judging circuit 4 and input end 5.4 back of succeeding electrical equipment output driving circuit 5 link to each other with the power output end 1.6 of power circuit 1, and the input end 5.3 of said relay output driving circuit 5 and the input end 6.5 that connects condition indication circuit 6 then link to each other with the output terminal 3.5 of photoelectric isolating circuit 3;
As shown in Figure 2; The circuit structure of said power circuit 1 is: the first siding ring of transformer T1 links to each other with power supply; The second siding ring of transformer T1 comprises first coil 7, second coil 8 and tertiary coil 9, and the output terminal of said first coil 7, second coil 8 and tertiary coil 9 links to each other with the input end of the first rectification circuit D1, the second rectification circuit D6 and the 3rd rectification circuit D7 respectively;
The output head anode of the said first rectification circuit D1 and connect the collector of an end and NPN type triode Q2 of negative pole, resistance R 12 of positive pole, the diode D5 of an end, the capacitor C 3 of capacitor C 6 after link to each other with the collector of NPN type triode Q1; The other end of resistance R 12 and connect the negative pole of voltage stabilizing diode D3 after link to each other with the base stage of NPN type triode Q2; Link to each other with the base stage of NPN type triode Q1 behind the emitter of NPN type triode Q2 and the end of connecting resistance R9; Link to each other with an end of resistance R 1 behind the emitter of NPN type triode Q1 and the other end of connecting resistance R9; The other end of said resistance R 1 and connect an end of capacitor C 30 after link to each other with input end that three ends can be aligned voltage stabilizer U1; The other end of said capacitor C 30 links to each other with an end of resistance R 24; Three ends link to each other with the power output end 1.1 of power circuit 1 after can aligning the output terminal of voltage stabilizer U1 and connecing the end of an end and resistance R 16 of an end of the positive pole of the positive pole of voltage stabilizing diode D3, diode D5, capacitor C 7, resistance R 8, and the control end that three ends can be aligned voltage stabilizer U1 links to each other with the control end 1.2 of power circuit 1; The negative pole of output end of the first rectification circuit D1 and connect the other end of the other end and resistance R 16 of the other end, resistance R 8 of negative pole, the capacitor C 7 of the other end, the capacitor C 3 of capacitor C 6 after link to each other with the power output end 1.3 of power circuit 1;
The output head anode of the said second rectification circuit D6 and connect the end of positive pole and capacitor C 11 of capacitor C 9 after link to each other with the input end of three terminal regulator U2; The output terminal of said three terminal regulator U2 and the anodal back that connects an end and the capacitor C 10 of capacitor C 12 link to each other with the power output end 1.4 of power circuit 1, the negative pole of output end of the second rectification circuit D6 and connect the other end of negative pole and resistance R 24 of the other end, capacitor C 10 of earth terminal, the capacitor C 12 of the other end, the three terminal regulator U2 of negative pole, the capacitor C 11 of capacitor C 9 after link to each other with the power output end 1.5 of power circuit 1;
The output head anode of said the 3rd rectification circuit D7 and connect the end of positive pole and capacitor C 15 of capacitor C 14 after link to each other with the input end of three terminal regulator U3; The output terminal of said three terminal regulator U3 and connect the end of positive pole and capacitor C 16 of capacitor C 13 after link to each other with the power output end 1.6 of power circuit 1, the negative pole of output end of the 3rd rectification circuit D7 and connect the other end of negative pole and capacitor C 16 of earth terminal, capacitor C 13 of the other end, the three terminal regulator U3 of negative pole, the capacitor C 15 of capacitor C 14 after ground connection.
Above-mentioned power circuit is provided with the multiple power supplies output port, can satisfy the power demands of the online leakage current detect module each several part of mining 3300V electric pressure, and be provided with the FEEDBACK CONTROL port, can be good at realizing the control to the detection of electrical leakage Acquisition Circuit.
As shown in Figure 3; The circuit structure of said detection signal input circuit 2 is: link to each other with the power end anodal 2.1 of detection signal input circuit 2 behind the end of the negative pole of an end of resistance R 7 and the end of connecting resistance R11, diode D2, an end of resistance R 10 and resistance R 2; The other end of said resistance R 11 links to each other with an end of capacitor C 8; Link to each other with the feedback end 2.2 of detection signal input circuit 2 behind the end of the anodal and connecting resistance R13 of diode D2; Link to each other with the stiff end of slide rheostat R19 behind the other end series resistor R14 of resistance R 13, the other end of said resistance R 7 and connect the end of another stiff end and resistance R 20 of sliding end, slide rheostat R19 of the other end, the slide rheostat R19 of capacitor C 8 after link to each other with the power input 2.3 of detection signal input circuit 2;
Link to each other with the signal output part 2.4 of detection signal input circuit 2 behind the other end series resistor R17 of said resistance R 10;
The other end of said resistance R 2 series resistor R3, resistance R 4, resistance R 5 and resistance R 6 backs successively links to each other with the detection signal input anode 2.5 of detection signal input circuit 2; The other end of said resistance R 20 links to each other with an end of resistance R 22, links to each other with the detection signal input cathode 2.6 of detection signal input circuit 2 behind the end of the end of the other end of resistance R 22 and connecting resistance R15, an end of capacitor C 4 and capacitor C 5; As shown in Figure 8, in actual applications, can form an asterism, more above-mentioned detection signal input anode 2.5 and detection signal input cathode 2.6 gone into as one group of termination to be detected in this asterism and ground by three-phase or two-phase reactor.
The other end of resistance R 15 series resistor R18 and capacitor C 1 back successively links to each other with line between resistance R 2 and the resistance R 3; The other end of capacitor C 4 links to each other with line between resistance R 3 and the resistance R 4; The other end of capacitor C 5 links to each other with line between resistance R 5 and the resistance R 6; One end of capacitor C 2 and capacitor C 1 link to each other with line between the resistance R 18, and the other end of capacitor C 2 links to each other with line between resistance R 4 and the resistance R 5.
Above-mentioned detection signal input circuit directly links to each other with the detection of electrical leakage port, is injected in the system under test (SUT) by a constant voltage signal through power port, through feedback, the sampling to the constant voltage signal; Obtain and a measured proportional electric signal; And this signal is transferred in the electric-leakage detection circuit, can realize collection to the online detection of electrical leakage signal of 3300V electric pressure circuit, precision is high; Response time is fast, for detection of electrical leakage provides the foundation.
As shown in Figure 4; The circuit structure of said photoelectric isolating circuit 3 is: link to each other with the power input 3.1 of photoelectric isolating circuit 3 behind the 6 pin series resistor R28 of HCNR200 chip U5,6 pin of HCNR200 chip U5,5 pin are respectively the output terminal 3.5,3.6 of photoelectric isolating circuit 3;
Link to each other with the power input 3.3 of photoelectric isolating circuit 3 behind 8 pin of LM258A chip U4 and the end of connecting resistance R25; The other end of said resistance R 25 links to each other with 2 pin of HCNR200 chip U5; One end of resistance R 27 and connect an end of capacitor C 18 after link to each other with the signal input part 3.4 of photoelectric isolating circuit 3; The other end of resistance R 27 links to each other with 3 pin of LM258A chip U4, the other end of capacitor C 18 and connect 4 pin of collector and HCNR200 chip U5 of 5 pin, positive-negative-positive triode Q4 of 4 pin, the LM258A chip U4 of LM258A chip U4 after link to each other with the power input 3.2 of photoelectric isolating circuit 3;
2 pin of said LM258A chip U4 link to each other with 1 pin; Be serially connected with resistance R 26 between 1 pin of LM258A chip U4 and 6 pin; 6 pin of LM258A chip U4 and connect an end of capacitor C 17 after link to each other with 3 pin of HCNR200 chip U5; 7 pin of LM258A chip U4 and connect the other end of capacitor C 17 after link to each other with the base stage of positive-negative-positive triode Q4, the emitter of positive-negative-positive triode Q4 links to each other with 1 pin of HCNR200 chip U5.
Above-mentioned photoelectric isolating circuit is realized the one-way transmission of signal, and input end and output terminal are realized electrical isolation fully, strengthens antijamming capability, life-saving, and transfer efficiency is high.
As shown in Figure 5; The circuit structure of said logic judging circuit 4 is: an end of resistance R 40 and connect the end of an end and resistance R 61 of capacitor C 25 after link to each other with the input end 4.2 of logic judging circuit 4, the other end of said resistance R 40 links to each other with 10 pin of LM2902N chip U7; One end of capacitor C 24 and connect the end of negative pole, resistance R 59 of adjustable voltage stabilizing diode U9 after link to each other with the input end 4.1 of logic judging circuit 4; Link to each other with the control end of adjustable voltage stabilizing diode U9 behind the end of the other end of said resistance R 59 and connecting resistance R62;
8 pin of said LM2902N chip U7 link to each other with 9 pin; Be serially connected with resistance R 46 between 8 pin of LM2902N chip U7 and 3 pin; Be serially connected with resistance R 21 between 1 pin of LM2902N chip U7 and 5 pin, link to each other with an end of resistance R 65 behind the end of 2 pin of LM2902N chip U7 and the end of connecting resistance R57 and capacitor C 20; The other end of said resistance R 57 links to each other with a stiff end of slide rheostat resistance R 55; Link to each other with an end of resistance R 43 behind the other end of capacitor C 20 and the sliding end that meets slide rheostat R55 and another stiff end, the other end of resistance R 43 links to each other with 12 pin of LM2902N chip U7;
4 pin of said LM2902N chip U7 link to each other with the power input 4.3 of logic judging circuit 4; 6 pin of LM2902N chip U7 and connect the end of an end and resistance R 39 of capacitor C 23 after link to each other with an end of resistance R 34; 7 pin of LM2902N chip U7 and connect the other end of the other end and resistance R 39 of capacitor C 23 after link to each other with an end of resistance R 60, the other end of said resistance R 60 is the signal output part 4.4 of logic judging circuit 4; Signal output part 4.4 will be exported signal and in time be transferred to level monitoring system, realize to the real-time monitoring of 3300V electric pressure circuit with to the timely processing of circuit abnormality situation;
13 pin of said LM2902N chip U7 and connect the end of an end and resistance R 58 of capacitor C 21 after link to each other with an end of resistance R 66; Link to each other with an end of resistance R 36 behind the other end of the other end of capacitor C 21 and connecting resistance R58, the other end of said resistance R 36 is the signal output part 4.6 of logic judging circuit 4; 14 pin of LM2902N chip U7 link to each other with an end of resistance R 47, and the other end of said resistance R 47 is the signal output part 4.5 of logic judging circuit 4;
Ground connection behind the other end of the other end of the positive pole of the other end of the other end of the other end of said capacitor C 25 and connecting resistance R61, capacitor C 24, TL431I chip U9, the other end of resistance R 62, resistance R 65, the other end of resistance R 34, resistance R 66 and 11 pin of LM2902N chip U7.
Above-mentioned logic judging circuit is provided with the multiple signals output port; Can be used as the input signal that the output of upper location supervisory and relay drives; Realization is guaranteed electric wiring safety to the real-time monitoring of 3300V electric pressure circuit with to the timely processing of circuit abnormality situation.
As shown in Figure 6; The circuit structure of said relay output driving circuit 5 is: an end of resistance R 30 links to each other with the input end 5.3 of relay output driving circuit 5; Link to each other with an end of resistance R 41 behind the end of the other end of resistance R 30 and connecting resistance R53 and the end of resistance R 35; Link to each other with an end of resistance R 68 behind the end of the other end of said resistance R 53 and connecting resistance R48, the other end of resistance R 48 links to each other with 6 pin of LM2901 chip U6; The other end of resistance R 35 links to each other with 11 pin of LM2901 chip U6, and the other end of resistance R 41 links to each other with 9 pin of LM2901 chip U6;
7 pin of said LM2901 chip U6,3 pin, 4 pin link to each other with the input end 5.2,5.4,5.1 of relay output driving circuit 5 respectively; Link to each other with an end of resistance R 50 behind 5 pin of LM2901 chip U6 and the end of connecting resistance R29; Link to each other with the output terminal 5.5 of relay output driving circuit 5 behind the end of the other end of said resistance R 50 and connecting resistance R67,2 pin with LM2901 chip U6 behind the end of the other end of resistance R 29 and connecting resistance R31 link to each other;
Link to each other with the input end 5.4 of relay output driving circuit 5 behind the end of the other end of said resistance R 31 and connecting resistance R32 and the end of inductance L 1; The other end of resistance R 32 links to each other with 13 pin of LM2901 chip U6; The other end of inductance L 1 and connect the negative pole of diode D8 after link to each other with an end of the coil of relay K 1,13 pin of said LM2901 chip U6 are the output terminal 5.6 of relay output driving circuit 5;
8 pin of said LM2901 chip U6 and connect an end of capacitor C 22 after link to each other with an end of resistance R 49, the other end of said resistance R 49 is the output terminal 5.7 of relay output driving circuit 5; Be serially connected with resistance R 38 between 1 pin of said LM2901 chip U6 and 10 pin; Be serially connected with resistance R 37 between 9 pin of LM2901 chip U6 and 14 pin; Link to each other with an end of resistance R 33 behind 14 pin of LM2901 chip U6 and the end of connecting resistance R42; The other end of said resistance R 33 is the output terminal 5.8 of relay output driving circuit 5; The other end of said resistance R 42 and connect an end of capacitor C 19 after link to each other with the base stage of NPN type triode Q6, the collector of said NPN type triode Q6 and the other end of coil that connects anodal back and the relay K 1 of diode D8 link to each other;
The other end of said resistance R 68 is ground connection successively and behind the other end of the other end of 12 pin of the other end of connecting resistance R67, LM2901 chip U6, capacitor C 22, capacitor C 19 and behind the emitter of NPN type triode Q6.
Above-mentioned relay output driving circuit is provided with multiple signals input, output port; Can the RL decision circuitry and the signal of photoelectric isolating circuit; And driving condition indicating circuit simultaneously, realize timely processing to 3300V electric pressure circuit abnormality situation, guarantee electric wiring safety.
As shown in Figure 7; The circuit structure of said condition indication circuit 6 is: said light emitting diode D14 anodal and connect the end of an end and resistance R 82 of positive pole, resistance R 76 of a stiff end, the diode D13 of slide rheostat R74 after link to each other with the input end 6.4 of condition indication circuit 6; The negative pole of said light emitting diode D14 links to each other with an end of resistance R 85; The other end of said resistance R 85 and connect 3 pin of conversion switch S 1 after ground connection, another stiff end of said slide rheostat R74 and connect the negative pole of sliding end and diode D13 of slide rheostat R74 after link to each other with the input end 6.5 of condition indication circuit 6;
The other end of said resistance R 76 links to each other with the collector of NPN type triode Q10; Collector with NPN type triode Q9 behind the end of the other end of resistance R 82 and connecting resistance R75 links to each other; Link to each other with the base stage of NPN type triode Q10 behind the other end serial connection light emitting diode D12 of said resistance R 75, link to each other with the input end 6.1 of condition indication circuit 6 behind the base stage series resistor R83 of said NPN type triode Q9;
Two light emitting diode lamp D15, D16, D17, D18's is one anodal and connect the back and link to each other with the emitter of NPN type triode Q10; Another of the above-mentioned couple of light emitting diode lamp D15, D16, D17, D18 is anodal and connect the back and link to each other with the emitter of NPN type triode Q9, and the negative pole of two light emitting diode lamp D15, D16, D17, D18 links to each other with 6 pin, 7 pin, 9 pin, 10 pin of switch S1 respectively;
The end of resistance R 86, R87, R88, R89 and connect the back link to each other with the input end 6.2 of condition indication circuit 6; The other end of resistance R 86, R87, R88, R89 links to each other with the stiff end of slide rheostat R77, R80, R79, R78 respectively, another stiff end of above-mentioned slide rheostat R77, R80, R79, R78 and connect sliding end separately after link to each other with 5 pin, 4 pin, 2 pin, 1 pin of switch S1 respectively; 8 pin of said switch S1 link to each other with the input end 6.3 of condition indication circuit 6.
Above-mentioned condition indication circuit is provided with the multi-channel input mouth; Can directly link to each other with the relay output driving circuit of leakage current detect module; Realization makes things convenient for the staff in time to understand the duty of electrical equipment to the state indication of 3300V electric pressure electric-leakage detection circuit.
Power end of the present invention, input end and signal output part three isolate fully, disturb inhibit feature stronger, can prevent faulty operation; Pilot signal and alerting signal are exported simultaneously, realize that monitoring is integrated, and accuracy of detection is high, and security is good.
Claims (3)
1. mining online leakage current detect module is characterized in that: comprising: power circuit (1), the detection signal input circuit (2) that links to each other with the leakage current detect port, photoelectric isolating circuit (3), logic judging circuit (4), relay output driving circuit (5) and condition indication circuit (6);
The power output end 1.1,1.3 of said power circuit (1) links to each other with the power input 2.1,2.3 of detection signal input circuit (2) respectively; The control end 1.2 of power circuit (1) links to each other with the feedback end 2.2 of detection signal input circuit (2); The power output end 1.4,1.5,1.6 of power circuit (1) links to each other with the input end 3.3,3.2,3.1 of photoelectric isolating circuit (3) respectively; The signal output part 2.4 of detection signal input circuit (2) links to each other with the signal input part 3.4 of photoelectric isolating circuit (3); The output terminal 3.5,3.6 of photoelectric isolating circuit (3) links to each other with the input end 4.1,4.2 of logic judging circuit (4) respectively; The output terminal 4.5,4.6 of logic judging circuit (4) links to each other with the input end 5.1,5.2 of relay output driving circuit (5) respectively, and the output terminal 5.5,5.6,5.7,5.8 of relay output driving circuit (5) links to each other with the input end 6.1,6.2,6.3,6.4 of condition indication circuit (6) respectively;
The input end 4.3 of said logic judging circuit (4) and input end 5.4 back of succeeding electrical equipment output driving circuit (5) link to each other with the power output end 1.6 of power circuit (1), and the input end 5.3 of said relay output driving circuit (5) and the input end 6.5 that connects condition indication circuit (6) then link to each other with the output terminal 3.5 of photoelectric isolating circuit (3).
2. mining online leakage current detect module according to claim 1; It is characterized in that: the circuit structure of said power circuit (1) is: the first siding ring of transformer T1 links to each other with power supply; The second siding ring of transformer T1 comprises first coil (7), second coil (8) and tertiary coil (9), and the output terminal of said first coil (7), second coil (8) and tertiary coil (9) links to each other with the input end of the first rectification circuit D1, the second rectification circuit D6 and the 3rd rectification circuit D7 respectively;
The output head anode of the said first rectification circuit D1 and connect the collector of an end and NPN type triode Q2 of negative pole, resistance R 12 of positive pole, the diode D5 of an end, the capacitor C 3 of capacitor C 6 after link to each other with the collector of NPN type triode Q1; The other end of resistance R 12 and connect the negative pole of voltage stabilizing diode D3 after link to each other with the base stage of NPN type triode Q2; Link to each other with the base stage of NPN type triode Q1 behind the emitter of NPN type triode Q2 and the end of connecting resistance R9; Link to each other with an end of resistance R 1 behind the emitter of NPN type triode Q1 and the other end of connecting resistance R9; The other end of said resistance R 1 and connect an end of capacitor C 30 after link to each other with input end that three ends can be aligned voltage stabilizer U1; The other end of said capacitor C 30 links to each other with an end of resistance R 24; Three ends link to each other with the power output end 1.1 of power circuit (1) after can aligning the output terminal of voltage stabilizer U1 and connecing the end of an end and resistance R 16 of an end of the positive pole of the positive pole of voltage stabilizing diode D3, diode D5, capacitor C 7, resistance R 8, and the control end that three ends can be aligned voltage stabilizer U1 links to each other with the control end 1.2 of power circuit (1); The negative pole of output end of the first rectification circuit D1 and connect the other end of the other end and resistance R 16 of the other end, resistance R 8 of negative pole, the capacitor C 7 of the other end, the capacitor C 3 of capacitor C 6 after link to each other with the power output end 1.3 of power circuit (1);
The output head anode of the said second rectification circuit D6 and connect the end of positive pole and capacitor C 11 of capacitor C 9 after link to each other with the input end of three terminal regulator U2; The output terminal of said three terminal regulator U2 and the anodal back that connects an end and the capacitor C 10 of capacitor C 12 link to each other with the power output end 1.4 of power circuit (1), the negative pole of output end of the second rectification circuit D6 and connect the other end of negative pole and resistance R 24 of the other end, capacitor C 10 of earth terminal, the capacitor C 12 of the other end, the three terminal regulator U2 of negative pole, the capacitor C 11 of capacitor C 9 after link to each other with the power output end 1.5 of power circuit (1);
The output head anode of said the 3rd rectification circuit D7 and connect the end of positive pole and capacitor C 15 of capacitor C 14 after link to each other with the input end of three terminal regulator U3; The output terminal of said three terminal regulator U3 and connect the end of positive pole and capacitor C 16 of capacitor C 13 after link to each other with the power output end 1.6 of power circuit (1), the negative pole of output end of the 3rd rectification circuit D7 and connect the other end of negative pole and capacitor C 16 of earth terminal, capacitor C 13 of the other end, the three terminal regulator U3 of negative pole, the capacitor C 15 of capacitor C 14 after ground connection;
The circuit structure of said detection signal input circuit (2) is: link to each other with the power end anodal 2.1 of detection signal input circuit (2) behind the end of the negative pole of an end of resistance R 7 and the end of connecting resistance R11, diode D2, an end of resistance R 10 and resistance R 2; The other end of said resistance R 11 links to each other with an end of capacitor C 8; Link to each other with the feedback end 2.2 of detection signal input circuit (2) behind the end of the anodal and connecting resistance R13 of diode D2; Link to each other with the stiff end of slide rheostat R19 behind the other end series resistor R14 of resistance R 13, the other end of said resistance R 7 and connect the end of another stiff end and resistance R 20 of sliding end, slide rheostat R19 of the other end, the slide rheostat R19 of capacitor C 8 after link to each other with the power input 2.3 of detection signal input circuit (2);
Link to each other with the signal output part 2.4 of detection signal input circuit (2) behind the other end series resistor R17 of said resistance R 10;
The other end of said resistance R 2 series resistor R3, resistance R 4, resistance R 5 and resistance R 6 backs successively links to each other with the detection signal input anode 2.5 of detection signal input circuit (2); The other end of said resistance R 20 links to each other with an end of resistance R 22, links to each other with the detection signal input cathode 2.6 of detection signal input circuit (2) behind the end of the end of the other end of resistance R 22 and connecting resistance R15, an end of capacitor C 4 and capacitor C 5;
The other end of resistance R 15 series resistor R18 and capacitor C 1 back successively links to each other with line between resistance R 2 and the resistance R 3; The other end of capacitor C 4 links to each other with line between resistance R 3 and the resistance R 4; The other end of capacitor C 5 links to each other with line between resistance R 5 and the resistance R 6; One end of capacitor C 2 and capacitor C 1 link to each other with line between the resistance R 18, and the other end of capacitor C 2 links to each other with line between resistance R 4 and the resistance R 5;
The circuit structure of said photoelectric isolating circuit (3) is: link to each other with the power input 3.1 of photoelectric isolating circuit (3) behind the 6 pin series resistor R28 of HCNR200 chip U5,6 pin of HCNR200 chip U5,5 pin are respectively the output terminal 3.5,3.6 of photoelectric isolating circuit (3);
Link to each other with the power input 3.3 of photoelectric isolating circuit (3) behind 8 pin of LM258A chip U4 and the end of connecting resistance R25; The other end of said resistance R 25 links to each other with 2 pin of HCNR200 chip U5; One end of resistance R 27 and connect an end of capacitor C 18 after link to each other with the signal input part 3.4 of photoelectric isolating circuit (3); The other end of resistance R 27 links to each other with 3 pin of LM258A chip U4, the other end of capacitor C 18 and connect 4 pin of collector and HCNR200 chip U5 of 5 pin, positive-negative-positive triode Q4 of 4 pin, the LM258A chip U4 of LM258A chip U4 after link to each other with the power input 3.2 of photoelectric isolating circuit (3);
2 pin of said LM258A chip U4 link to each other with 1 pin; Be serially connected with resistance R 26 between 1 pin of LM258A chip U4 and 6 pin; 6 pin of LM258A chip U4 and connect an end of capacitor C 17 after link to each other with 3 pin of HCNR200 chip U5; 7 pin of LM258A chip U4 and connect the other end of capacitor C 17 after link to each other with the base stage of positive-negative-positive triode Q4, the emitter of positive-negative-positive triode Q4 links to each other with 1 pin of HCNR200 chip U5;
The circuit structure of said logic judging circuit (4) is: an end of resistance R 40 and connect the end of an end and resistance R 61 of capacitor C 25 after link to each other with the input end 4.2 of logic judging circuit (4), the other end of said resistance R 40 links to each other with 10 pin of LM2902N chip U7; One end of capacitor C 24 and connect the end of negative pole, resistance R 59 of adjustable voltage stabilizing diode U9 after link to each other with the input end 4.1 of logic judging circuit (4); Link to each other with the control end of adjustable voltage stabilizing diode U9 behind the end of the other end of said resistance R 59 and connecting resistance R62;
8 pin of said LM2902N chip U7 link to each other with 9 pin; Be serially connected with resistance R 46 between 8 pin of LM2902N chip U7 and 3 pin; Be serially connected with resistance R 21 between 1 pin of LM2902N chip U7 and 5 pin, link to each other with an end of resistance R 65 behind the end of 2 pin of LM2902N chip U7 and the end of connecting resistance R57 and capacitor C 20; The other end of said resistance R 57 links to each other with a stiff end of slide rheostat resistance R 55; Link to each other with an end of resistance R 43 behind the other end of capacitor C 20 and the sliding end that meets slide rheostat R55 and another stiff end, the other end of resistance R 43 links to each other with 12 pin of LM2902N chip U7;
4 pin of said LM2902N chip U7 link to each other with the power input 4.3 of logic judging circuit (4); 6 pin of LM2902N chip U7 and connect the end of an end and resistance R 39 of capacitor C 23 after link to each other with an end of resistance R 34; 7 pin of LM2902N chip U7 and connect the other end of the other end and resistance R 39 of capacitor C 23 after link to each other with an end of resistance R 60, the other end of said resistance R 60 is the signal output part 4.4 of logic judging circuit (4);
13 pin of said LM2902N chip U7 and connect the end of an end and resistance R 58 of capacitor C 21 after link to each other with an end of resistance R 66; Link to each other with an end of resistance R 36 behind the other end of the other end of capacitor C 21 and connecting resistance R58, the other end of said resistance R 36 is the signal output part 4.6 of logic judging circuit (4); 14 pin of LM2902N chip U7 link to each other with an end of resistance R 47, and the other end of said resistance R 47 is the signal output part 4.5 of logic judging circuit (4);
Ground connection behind the other end of the other end of the positive pole of the other end of the other end of the other end of said capacitor C 25 and connecting resistance R61, capacitor C 24, TL431I chip U9, the other end of resistance R 62, resistance R 65, the other end of resistance R 34, resistance R 66 and 11 pin of LM2902N chip U7;
The circuit structure of said relay output driving circuit (5) is: an end of resistance R 30 links to each other with the input end 5.3 of relay output driving circuit (5); Link to each other with an end of resistance R 41 behind the end of the other end of resistance R 30 and connecting resistance R53 and the end of resistance R 35; Link to each other with an end of resistance R 68 behind the end of the other end of said resistance R 53 and connecting resistance R48, the other end of resistance R 48 links to each other with 6 pin of LM2901 chip U6; The other end of resistance R 35 links to each other with 11 pin of LM2901 chip U6, and the other end of resistance R 41 links to each other with 9 pin of LM2901 chip U6;
7 pin of said LM2901 chip U6,3 pin, 4 pin link to each other with the input end 5.2,5.4,5.1 of relay output driving circuit (5) respectively; Link to each other with an end of resistance R 50 behind 5 pin of LM2901 chip U6 and the end of connecting resistance R29; Output terminal 5.5 with relay output driving circuit (5) behind the end of the other end of said resistance R 50 and connecting resistance R67 links to each other, and 2 pin with LM2901 chip U6 behind the end of the other end of resistance R 29 and connecting resistance R31 link to each other;
Link to each other with the input end 5.4 of relay output driving circuit (5) behind the end of the other end of said resistance R 31 and connecting resistance R32 and the end of inductance L 1; The other end of resistance R 32 links to each other with 13 pin of LM2901 chip U6; The other end of inductance L 1 and connect the negative pole of diode D8 after link to each other with an end of the coil of relay K 1,13 pin of said LM2901 chip U6 are the output terminal 5.6 of relay output driving circuit (5);
8 pin of said LM2901 chip U6 and connect an end of capacitor C 22 after link to each other with an end of resistance R 49, the other end of said resistance R 49 is the output terminal 5.7 of relay output driving circuit (5); Be serially connected with resistance R 38 between 1 pin of said LM2901 chip U6 and 10 pin; Be serially connected with resistance R 37 between 9 pin of LM2901 chip U6 and 14 pin; Link to each other with an end of resistance R 33 behind 14 pin of LM2901 chip U6 and the end of connecting resistance R42; The other end of said resistance R 33 is the output terminal 5.8 of relay output driving circuit (5); The other end of said resistance R 42 and connect an end of capacitor C 19 after link to each other with the base stage of NPN type triode Q6, the collector of said NPN type triode Q6 and the other end of coil that connects anodal back and the relay K 1 of diode D8 link to each other;
The other end of said resistance R 68 is ground connection successively and behind the other end of the other end of 12 pin of the other end of connecting resistance R67, LM2901 chip U6, capacitor C 22, capacitor C 19 and behind the emitter of NPN type triode Q6.
3. mining online leakage current detect module according to claim 2; It is characterized in that: the circuit structure of said condition indication circuit (6) is: said light emitting diode D14 anodal and connect the end of an end and resistance R 82 of positive pole, resistance R 76 of a stiff end, the diode D13 of slide rheostat R74 after link to each other with the input end 6.4 of condition indication circuit (6); The negative pole of said light emitting diode D14 links to each other with an end of resistance R 85; The other end of said resistance R 85 and connect 3 pin of conversion switch S 1 after ground connection, another stiff end of said slide rheostat R74 and connect the negative pole of sliding end and diode D13 of slide rheostat R74 after link to each other with the input end 6.5 of condition indication circuit (6);
The other end of said resistance R 76 links to each other with the collector of NPN type triode Q10; Collector with NPN type triode Q9 behind the end of the other end of resistance R 82 and connecting resistance R75 links to each other; Link to each other with the base stage of NPN type triode Q10 behind the other end serial connection light emitting diode D12 of said resistance R 75, link to each other with the input end 6.1 of condition indication circuit (6) behind the base stage series resistor R83 of said NPN type triode Q9;
Two light emitting diode lamp D15, D16, D17, D18's is one anodal and connect the back and link to each other with the emitter of NPN type triode Q10; Another of the above-mentioned couple of light emitting diode lamp D15, D16, D17, D18 is anodal and connect the back and link to each other with the emitter of NPN type triode Q9, and the negative pole of two light emitting diode lamp D15, D16, D17, D18 links to each other with 6 pin, 7 pin, 9 pin, 10 pin of switch S1 respectively;
The end of resistance R 86, R87, R88, R89 and connect the back link to each other with the input end 6.2 of condition indication circuit (6); The other end of resistance R 86, R87, R88, R89 links to each other with the stiff end of slide rheostat R77, R80, R79, R78 respectively, another stiff end of above-mentioned slide rheostat R77, R80, R79, R78 and connect sliding end separately after link to each other with 5 pin, 4 pin, 2 pin, 1 pin of switch S1 respectively; 8 pin of said switch S1 link to each other with the input end 6.3 of condition indication circuit (6).
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| CN112072629A (en) * | 2020-09-10 | 2020-12-11 | 新风光电子科技股份有限公司 | 3300V and following voltage class electric leakage blocking circuit |
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| CN105332735A (en) * | 2014-08-11 | 2016-02-17 | 山西全安新技术开发有限公司 | System and method for preventing live working and gas explosion in coal mine |
| CN105332735B (en) * | 2014-08-11 | 2018-01-30 | 山西全安新技术开发有限公司 | Prevent the method and system of colliery livewire work and gas explosion |
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| CN104935185B (en) * | 2015-07-03 | 2017-10-31 | 重庆澳凯龙医疗科技股份有限公司 | Intelligent switch power source for blood purification system |
| CN107917770A (en) * | 2017-12-07 | 2018-04-17 | 太原理工大学 | Possesses the road foundation pressure-detecting device of long distance transmission and anti-interference function |
| CN107917770B (en) * | 2017-12-07 | 2023-06-16 | 太原理工大学 | Road subgrade pressure detection device with long-distance transmission and anti-interference functions |
| CN112072629A (en) * | 2020-09-10 | 2020-12-11 | 新风光电子科技股份有限公司 | 3300V and following voltage class electric leakage blocking circuit |
| CN112072629B (en) * | 2020-09-10 | 2022-10-25 | 新风光电子科技股份有限公司 | 3300V and following voltage class electric leakage blocking circuit |
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