CN104749484B - Leakage monitoring device - Google Patents

Leakage monitoring device Download PDF

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Publication number
CN104749484B
CN104749484B CN201510193362.1A CN201510193362A CN104749484B CN 104749484 B CN104749484 B CN 104749484B CN 201510193362 A CN201510193362 A CN 201510193362A CN 104749484 B CN104749484 B CN 104749484B
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China
Prior art keywords
module
resistance
leakage
transformer
comparator
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CN104749484A (en
Inventor
张宇
邵靖珉
邵德珉
张斐
李智
赵欣
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State Grid Corp of China SGCC
Taiyuan Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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State Grid Corp of China SGCC
Taiyuan Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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Abstract

The present invention relates to a kind of device that can in time detect electric leakage signal, specially a kind of leakage monitoring device, including:Main control module, detection of electrical leakage module, simulation electric leakage module, alarm modules, display module and power module, the main control module is connected with detection of electrical leakage module, simulation electric leakage module, alarm modules and display module respectively, and the power module is powered for whole device;The present invention is applied to power department.

Description

Leakage monitoring device
Technical field
The present invention relates to a kind of device that can in time detect electric leakage signal, specially a kind of leakage monitoring device.
Background technology
At present, to low voltage distribution transformer(Abbreviation transformer)Various protectors have the open circuit of various high pressures in high-pressure side Device, arrester etc., low-pressure side have various fuses, A.C. contactor, phase demodulation amplitude discrimination relay etc., are arranged in spite of so protection Apply, but due to the various complex circuit of transformer capacity grade, the various safeguard measures supporting with it are difficult to accomplish perfectly safe, especially It is the leak current fault of transformer, and any position is likely to occur, and general earth leakage protective is in main circuit, and electric leakage Whether protection circuit can not effectively monitor in real time in itself, so as to cause transformer leakage failure timely to find, Due to aging, the change of production environment of power network, power network produces the reasons such as earth point, it may occur that shorted to earth, cable and electronic Often there is electric leakage accident in machine winding, after electric leakage accident occurs, can not only cause accident of human electric shock, can also cause single-phase connecing Ground, and then develop into phase fault, electrical fire accident is in turn resulted in, bring many unfavorable shadows to normal production and life Ring.
The content of the invention
The present invention overcomes the shortcomings of that prior art is present, and technical problem to be solved is:There is provided one kind can examine constantly The device of power information of leaking hunting.
The present invention adopts the following technical scheme that realization:
A kind of leakage monitoring device, including:It is main control module, detection of electrical leakage module, simulation electric leakage module, alarm modules, aobvious Show module and power module, the main control module respectively with detection of electrical leakage module, simulation electric leakage module, alarm modules and display mould Block is connected, and the power module is powered for whole device;
The circuit structure of the detection of electrical leakage module is:Current transformer T1 summation current transformers T2 is serially connected in power supply respectively In the phase line and zero line of circuit, the primary side of transformer T3 is wound with two groups of identical coils, the current transformer T1 and electricity The signal output part of current transformer T2 is connected with transformer T3 first siding rings respectively;
The secondary side output head anode of the transformer T3 is connected with the positive pole of diode D1, the negative pole of the diode D1 It is connected with the positive input terminal of comparator IC1 after one end, the negative pole of diode D2 of shunt-wound capacitance C1, the transformer T3's is secondary It is grounded behind one end of the other end, the positive pole of diode D2 and resistance R1 of side negative pole of output end shunt-wound capacitance C1, the resistance R1 The other end and connecting resistance R2 one end after be connected with the negative input end of comparator IC1, the output end of the comparator IC1 simultaneously connects One end after the other end of resistance R2 with resistance R3 is connected;
The other end of the resistance R3 is connected with the positive input terminal of comparator IC2, and the negative input end of the comparator IC2 is simultaneously One end behind one end of connecting resistance R4 with resistance R5 is connected, and the other end of the resistance R4 is connected with+5V power supplys, the resistance R5 The other end ground connection, be connected with the positive pole of diode D3 after the output end series resistor R6 of comparator IC2, the diode D3's Negative pole is the signal output part a1 of detection of electrical leakage module.
The detection of electrical leakage module has multiple, can simultaneously detect the electric leakage information of multiple branch roads, the current transformer T2 is identical for T1 summation current transformers, and what is be respectively symmetrically is enclosed within phase line and zero line, when circuit is without electric leakage, the two of transformer T3 Secondary side does not produce induced potential, and when circuit has electric leakage, the secondary side of transformer T3 produces induced potential, after comparator amplifies Output electric leakage signal.
The leakage monitoring device also includes temperature detecting module 7, the temperature detecting module 7 and above-mentioned main control module 1 is connected.
The present invention has an advantageous effect in that compared with prior art:By the acquisition module that leaks electricity, collection becomes each to the present invention The drain conditions of equipment, and drain conditions are sent to main control module, the alarm connected by main control module is sent out with display module Go out leakage-current alarm and display, can at the scene measure drain conditions, convenient use can simultaneously detect the electric leakage letter of multiple branch roads Whether breath, detection is accurate, and is additionally provided with simulation electric leakage module, effective can test electric-leakage detection circuit;Whole device knot Structure is succinct, easy to use.
Brief description of the drawings
Fig. 1 is electrical block diagram of the invention.
Fig. 2 is the circuit diagram of detection of electrical leakage module in the present invention.
In figure:1- main control modules, 2- detection of electrical leakage modules, 3- simulation electric leakage modules, 4- alarm modules, 5- display modules, 6- power modules, 7- temperature detecting modules.
Specific embodiment
The invention will now be described in further detail with reference to the accompanying drawings:
A kind of leakage monitoring device, as shown in figure 1, including:Main control module 1, detection of electrical leakage module 2, simulation electric leakage module 3rd, alarm modules 4, display module 5, power module 6 and temperature detecting module 7, the main control module 1 respectively with detection of electrical leakage mould Block 2, simulation electric leakage module 3, alarm modules 4, display module 5 are connected with temperature detecting module 7, and the power module 6 is whole Device is powered.
As shown in Fig. 2 the circuit structure of the detection of electrical leakage module 2 is:Current transformer T1 summation current transformers T2 points It is not serially connected in the phase line and zero line of supply line, the primary side of transformer T3 is wound with two groups of identical coils, the electric current The signal output part of transformer T1 summation current transformers T2 is connected with transformer T3 first siding rings respectively, and transformer T3 is once The turn ratio of side and secondary side is 1:5.
The secondary side output head anode of the transformer T3 is connected with the positive pole of diode D1, the negative pole of the diode D1 It is connected with the positive input terminal of comparator IC1 after one end, the negative pole of diode D2 of shunt-wound capacitance C1, the transformer T3's is secondary It is grounded behind one end of the other end, the positive pole of diode D2 and resistance R1 of side negative pole of output end shunt-wound capacitance C1, the resistance R1 The other end and connecting resistance R2 one end after be connected with the negative input end of comparator IC1, the output end of the comparator IC1 simultaneously connects One end after the other end of resistance R2 with resistance R3 is connected.
The other end of the resistance R3 is connected with the positive input terminal of comparator IC2, and the negative input end of the comparator IC2 is simultaneously One end behind one end of connecting resistance R4 with resistance R5 is connected, and the other end of the resistance R4 is connected with+5V power supplys, the resistance R5 The other end ground connection, be connected with the positive pole of diode D3 after the output end series resistor R6 of comparator IC2, the diode D3's Negative pole is the signal output part a1 of detection of electrical leakage module 2.
The detection of electrical leakage module 2 has multiple, can simultaneously detect the electric leakage information of multiple branch roads, the current transformer T2 is identical for T1 summation current transformers, and what is be respectively symmetrically is enclosed within phase line and zero line, when circuit is without electric leakage, the two of transformer T3 Secondary side does not produce induced potential, and when circuit has electric leakage, the secondary side of transformer T3 produces induced potential, after comparator amplifies Output electric leakage signal.
The present invention becomes the drain conditions of each equipment by the acquisition module that leaks electricity, collection, and drain conditions are sent to master control Module, the alarm connected by main control module sends leakage-current alarm and display with display module, can at the scene measure electric leakage feelings Condition, convenient use can simultaneously detect the electric leakage information of multiple branch roads, and detection is accurate, and is additionally provided with simulation electric leakage module, Electric-leakage detection circuit can be tested whether effective;Whole device is simple for structure, easy to use.
Embodiments of the invention are explained in detail above in conjunction with accompanying drawing, but the present invention is not limited to above-mentioned implementation Example, in the ken that those of ordinary skill in the art possess, can also do on the premise of present inventive concept is not departed from Go out various change.

Claims (3)

1. a kind of leakage monitoring device, it is characterised in that:Including main control module(1), detection of electrical leakage module(2), simulation electric leakage mould Block(3), alarm modules(4), display module(5)And power module(6), the main control module(1)Respectively with detection of electrical leakage module (2), simulation electric leakage module(3), alarm modules(4)And display module(5)It is connected, the power module(6)For whole device is supplied Electricity;
The detection of electrical leakage module(2)Circuit structure be:Current transformer T1 summation current transformers T2 is serially connected in power supply respectively In the phase line and zero line of circuit, the primary side of transformer T3 is wound with two groups of identical coils, the current transformer T1 and electricity The signal output part of current transformer T2 is connected with transformer T3 first siding rings respectively, the primary side of transformer T3 and secondary side Turn ratio is 1:5;
The secondary side output head anode of the transformer T3 is connected with the positive pole of diode D1, and the negative pole of the diode D1 simultaneously connects It is connected with the positive input terminal of comparator IC1 after one end, the negative pole of diode D2 of electric capacity C1, the secondary side of the transformer T3 is defeated Go out to hold negative pole shunt-wound capacitance C1 the other end, the positive pole of diode D2 and resistance R1 one end after be grounded, the resistance R1's is another It is connected with the negative input end of comparator IC1 behind one end of one end and connecting resistance R2, the output end and connecting resistance of the comparator IC1 One end after the other end of R2 with resistance R3 is connected;
The other end of the resistance R3 is connected with the positive input terminal of comparator IC2, and the negative input end of the comparator IC2 simultaneously connects electricity It is connected with one end of resistance R5 behind the one end for hindering R4, the other end of the resistance R4 is connected with+5V power supplys, and the resistance R5's is another One end is grounded, and is connected with the positive pole of diode D3 after the output end series resistor R6 of comparator IC2, the negative pole of the diode D3 It is detection of electrical leakage module(2)Signal output part a1.
2. leakage monitoring device according to claim 1, it is characterised in that:The detection of electrical leakage module(2)There is multiple.
3. leakage monitoring device according to claim 1 and 2, it is characterised in that:The leakage monitoring device is also included Temperature detecting module(7), the temperature detecting module(7)With above-mentioned main control module(1)It is connected.
CN201510193362.1A 2015-04-22 2015-04-22 Leakage monitoring device Active CN104749484B (en)

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Publication number Priority date Publication date Assignee Title
CN104979911B (en) * 2015-07-17 2017-09-26 国网山西省电力公司大同供电公司 A kind of remote monitoring system for transformer
CN104991155B (en) * 2015-07-17 2018-02-02 国网山西省电力公司大同供电公司 A kind of security detection equipment for transformer
CN107785868A (en) * 2017-11-09 2018-03-09 南通盛洋电气有限公司 The transformer leakage protection system of real-time earthing water conservancy diversion

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CN201868846U (en) * 2010-12-07 2011-06-15 合肥荣事达三洋电器股份有限公司 Earth-leakage protection controller
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CN203164282U (en) * 2013-01-18 2013-08-28 南京民盛电子仪器有限公司 Leakage current tester capable of being simultaneously applicable to medical and civil standard
CN203858319U (en) * 2014-06-06 2014-10-01 成都福兰特电子技术有限公司 Equipment leakage protection monitoring alarm system based on TD-LTE network
CN204515063U (en) * 2015-04-22 2015-07-29 国家电网公司 Leakage monitoring device

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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201594121U (en) * 2009-08-21 2010-09-29 杭州晶华微电子有限公司 Current leakage detecting device
CN201868846U (en) * 2010-12-07 2011-06-15 合肥荣事达三洋电器股份有限公司 Earth-leakage protection controller
CN102879667A (en) * 2012-09-17 2013-01-16 吉林省泰华电子有限公司 Lightning protection device on-line remote monitoring recorder
CN203164282U (en) * 2013-01-18 2013-08-28 南京民盛电子仪器有限公司 Leakage current tester capable of being simultaneously applicable to medical and civil standard
CN203858319U (en) * 2014-06-06 2014-10-01 成都福兰特电子技术有限公司 Equipment leakage protection monitoring alarm system based on TD-LTE network
CN204515063U (en) * 2015-04-22 2015-07-29 国家电网公司 Leakage monitoring device

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