CN102621440B - Detection signal input circuit of on-line leakage monitoring module for mine - Google Patents

Detection signal input circuit of on-line leakage monitoring module for mine Download PDF

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Publication number
CN102621440B
CN102621440B CN201210098839.4A CN201210098839A CN102621440B CN 102621440 B CN102621440 B CN 102621440B CN 201210098839 A CN201210098839 A CN 201210098839A CN 102621440 B CN102621440 B CN 102621440B
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resistance
signal input
detection signal
input circuit
capacitor
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CN201210098839.4A
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CN102621440A (en
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刘涛
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Abstract

The invention discloses a detection signal input circuit of an on-line leakage monitoring module for mine, belongs to the technical field of an on-line leakage monitoring circuit for mine, and aims at providing a detection signal input circuit of an underground on-line leakage monitoring module of 3300V voltage level in a coal mine. The technical scheme is as follows: the other end of a resistor R10 is connected with a resistor R17 in series and then is connected with the signal output end 2.4 of the detection signal input circuit; the other end of a resistor R2 is sequentially connected with a resistor R3, a resistor R4, a resistor R5 and a resistor R6 in series and then is connected with the detection signal input end positive electrode 2.5 of the detection signal input circuit; the other end of the resistor R2 is connected with one end of a resistor R22; and the other end of the resistor R22 is connected with one end of a resistor R15, one end of a capacitor C4, and one end of a capacitor C5 in parallel, and then is connected with the detection signal input end negative electrode 2.6 of the detection signal input circuit. The detection signal input circuit is suitable for the field of coal mine.

Description

Mining online leakage current detect module detection signal input circuit
Technical field
The present invention is mining online leakage current detect module detection signal input circuit, belongs to mining online electric leakage monitoring circuit technical field.
Background technology
Safety is all first requirement for any industrial environment, for the subsurface environment of colliery, and gas, coal dust, fire, water, roof pressure, Electromechanical Accidents is topmost six major break down reasons; And for these accidents, except water and roof pressure, Electromechanical Accidents, first three items is the most dangerous, all can cause explosion of coal mines accident, and its reason is all because electric spark causes; And because the caused electric spark of electric leakage accounts for very large ratio; And for personal security, because the working environment of down-hole is special, narrow space, humidity, vibration is large, and high humidity is very easy to cause casualties because of electric leakage.
In order to prevent the generation root and the injury of electric leakage to operating personnel of electric spark, supply transformer neutral point under national regulation coal mine can not ground connection, the namely powered operation mode of our said isolated neutral, and industry on ground, folk power supply mode is generally transformer neutral point direct grounding way, on the other hand, because the power supply voltage level under coal mine is 1140V and 3300V, this special power supply mode in colliery and electric pressure 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 meet the needs of the high-yield and high-efficiency in colliery, power supply voltage level all needs to the transition of 3300V electric pressure and transformation, the domestic development for the electrical equipment under 3300V electric pressure at present, substantially in the incipient stage, need the problem of solution also a lot, particularly the online leakage current detect of the electric wiring under 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, and technical matters to be solved is: the detection signal input circuit that a kind of online leakage current detect module for 3300V electric pressure under coal mine is provided.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: mining online leakage current detect module detection signal input circuit, one end of one end of resistance R 7 connecting resistance R11, the negative pole of diode D2, behind one end of one end of resistance R 10 and resistance R 2, be connected with the power end anodal 2.1 of detection signal input circuit, the other end of described resistance R 11 is connected with one end of capacitor C 8, behind one end of the anodal and connecting resistance R13 of diode D2, be connected with the feedback end 2.2 of detection signal input circuit, after the other end series resistor R14 of resistance R 13, be connected with a stiff end of slide rheostat R19, the other end of the other end shunt-wound capacitance C8 of described resistance R 7, the sliding end of slide rheostat R19, another stiff end of slide rheostat R19 with behind one end of resistance R 20, be connected with the power end negative pole 2.3 of detection signal input circuit,
After the other end series resistor R17 of described resistance R 10, be connected with the signal output part 2.4 of detection signal input circuit;
The other end of described resistance R 2 is connected with the detection signal input anode 2.5 of detection signal input circuit after series resistor R3, resistance R 4, resistance R 5 and resistance R 6 successively, the other end of described resistance R 20 is connected with one end of resistance R 22, behind one end of one end of the other end of resistance R 22 connecting resistance R15, one end of capacitor C 4 and capacitor C 5, is connected with the detection signal input cathode 2.6 of detection signal input circuit;
The other end of resistance R 15 successively after series resistor R18 and capacitor C 1 with resistance R 2 and resistance R 3 between line be connected, the other end of capacitor C 4 is connected with the line between resistance R 3 and resistance R 4, the other end of capacitor C 5 is connected with the line between resistance R 5 and resistance R 6, one end of capacitor C 2 is connected with the line between capacitor C 1 and resistance R 18, and the other end of capacitor C 2 is connected with the line between resistance R 4 and resistance R 5.
The beneficial effect that the present invention compared with prior art has is: the present invention is directly connected with detection of electrical leakage port, by power port by a constant voltage signal injection in system under test (SUT), by the feedback to constant voltage signal, sampling, obtain and a measured proportional electric signal, and this signal is transferred in electric-leakage detection circuit, can realize the collection of the online detection of electrical leakage signal to 3300V electric pressure circuit, precision is high, response time is fast, for detection of electrical leakage provides the foundation.
Brief description of the drawings
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is electrical block diagram of the present invention.
Fig. 2 is application circuit structural representation of the present invention.
Embodiment
As shown in Figure 1, the present invention is mining online leakage current detect module detection signal input circuit, one end of one end of resistance R 7 connecting resistance R11, the negative pole of diode D2, behind one end of one end of resistance R 10 and resistance R 2, be connected with the power end anodal 2.1 of detection signal input circuit, the other end of described resistance R 11 is connected with one end of capacitor C 8, behind one end of the anodal and connecting resistance R13 of diode D2, be connected with the feedback end 2.2 of detection signal input circuit, after the other end series resistor R14 of resistance R 13, be connected with a stiff end of slide rheostat R19, the other end of the other end shunt-wound capacitance C8 of described resistance R 7, the sliding end of slide rheostat R19, another stiff end of slide rheostat R19 with behind one end of resistance R 20, be connected with the power end negative pole 2.3 of detection signal input circuit.
After the other end series resistor R17 of described resistance R 10, be connected with the signal output part 2.4 of detection signal input circuit, the electric signal that signal output part 2.4 is exported is and a measured proportional electric signal, sends it in electric-leakage detection circuit by signal output part 2.4.
The other end of described resistance R 2 is connected with the detection signal input anode 2.5 of detection signal input circuit after series resistor R3, resistance R 4, resistance R 5 and resistance R 6 successively, the other end of described resistance R 20 is connected with one end of resistance R 22, behind one end of one end of the other end of resistance R 22 connecting resistance R15, one end of capacitor C 4 and capacitor C 5, is connected with the detection signal input cathode 2.6 of detection signal input circuit; As shown in Figure 2, in actual applications, can form an asterism by three-phase or two-phase reactor, then this asterism and ground are entered to above-mentioned detection signal input anode 2.5 and detection signal input cathode 2.6 as one group of detected termination.
The other end of resistance R 15 successively after series resistor R18 and capacitor C 1 with resistance R 2 and resistance R 3 between line be connected, the other end of capacitor C 4 is connected with the line between resistance R 3 and resistance R 4, the other end of capacitor C 5 is connected with the line between resistance R 5 and resistance R 6, one end of capacitor C 2 is connected with the line between capacitor C 1 and resistance R 18, and the other end of capacitor C 2 is connected with the line between resistance R 4 and resistance R 5; Above-mentioned resistance R 3, resistance R 4, resistance R 5 all adopt the resistance of 22k Ω, can realize the electric leakage signal collection to 3300V electric pressure circuit.
The present invention is directly connected with detection of electrical leakage port, by power port by a constant voltage signal injection in system under test (SUT), by the feedback to constant voltage signal, sampling, obtain and a measured proportional electric signal, and this signal is transferred in electric-leakage detection circuit, can realize the collection of the online detection of electrical leakage signal to 3300V electric pressure circuit, precision is high, response time is fast, for detection of electrical leakage provides the foundation.

Claims (1)

1. mining online leakage current detect module detection signal input circuit, it is characterized in that: one end of one end of resistance R 7 connecting resistance R11, the negative pole of diode D2, behind one end of one end of resistance R 10 and resistance R 2, be connected with the power end anodal 2.1 of detection signal input circuit, the other end of described resistance R 11 is connected with one end of capacitor C 8, behind one end of the anodal and connecting resistance R13 of diode D2, be connected with the feedback end 2.2 of detection signal input circuit, after the other end series resistor R14 of resistance R 13, be connected with a stiff end of slide rheostat R19, the other end of the other end shunt-wound capacitance C8 of described resistance R 7, the sliding end of slide rheostat R19, another stiff end of slide rheostat R19 with behind one end of resistance R 20, be connected with the power end negative pole 2.3 of detection signal input circuit,
After the other end series resistor R17 of described resistance R 10, be connected with the signal output part 2.4 of detection signal input circuit;
The other end of described resistance R 2 is connected with the detection signal input anode 2.5 of detection signal input circuit after series resistor R3, resistance R 4, resistance R 5 and resistance R 6 successively, the other end of described resistance R 20 is connected with one end of resistance R 22, behind one end of one end of the other end of resistance R 22 connecting resistance R15, one end of capacitor C 4 and capacitor C 5, is connected with the detection signal input cathode 2.6 of detection signal input circuit;
The other end of resistance R 15 successively after series resistor R18 and capacitor C 1 with resistance R 2 and resistance R 3 between line be connected, the other end of capacitor C 4 is connected with the line between resistance R 3 and resistance R 4, the other end of capacitor C 5 is connected with the line between resistance R 5 and resistance R 6, one end of capacitor C 2 is connected with the line between capacitor C 1 and resistance R 18, and the other end of capacitor C 2 is connected with the line between resistance R 4 and resistance R 5.
CN201210098839.4A 2012-04-06 2012-04-06 Detection signal input circuit of on-line leakage monitoring module for mine Expired - Fee Related CN102621440B (en)

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Application Number Priority Date Filing Date Title
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CN102621440B true CN102621440B (en) 2014-10-15

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5514967A (en) * 1994-08-16 1996-05-07 Zelm; Richard J. Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level
CN202614883U (en) * 2012-04-06 2012-12-19 刘涛 Detection signal input circuit for mining on-line electric-leakage monitoring module

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002112449A (en) * 2000-09-28 2002-04-12 Hikari Shoko Kk Method and apparatus for detecting and protecting from leak of low voltage ground line
US7295016B2 (en) * 2004-06-18 2007-11-13 Kokusan Denki Co., Ltd. Electric leakage detection system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5514967A (en) * 1994-08-16 1996-05-07 Zelm; Richard J. Automatic insulation test equipment for testing high voltage electrical equipment at the rated voltage level
CN202614883U (en) * 2012-04-06 2012-12-19 刘涛 Detection signal input circuit for mining on-line electric-leakage monitoring module

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
JP特开2002-112449A 2002.04.12
一种附加直流电源漏电保护器的研制;高赟;《工矿自动化》;20100430(第4期);22-24 *
王德胜.附加直流电源检测法在漏电保护中的应用.《工矿自动化》.2010,(第2期),62-64.
附加直流电源检测法在漏电保护中的应用;王德胜;《工矿自动化》;20100228(第2期);62-64 *
高赟.一种附加直流电源漏电保护器的研制.《工矿自动化》.2010,(第4期),22-24.

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