CN103424596A - Acquiring and amplifying device of passive AC micro-current - Google Patents
Acquiring and amplifying device of passive AC micro-current Download PDFInfo
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- CN103424596A CN103424596A CN2013101907488A CN201310190748A CN103424596A CN 103424596 A CN103424596 A CN 103424596A CN 2013101907488 A CN2013101907488 A CN 2013101907488A CN 201310190748 A CN201310190748 A CN 201310190748A CN 103424596 A CN103424596 A CN 103424596A
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Abstract
An acquiring and amplifying device of a passive AC micro-current comprises a multi-winding insulating coil, coil taps of N times of number of turns are extracted from the coil to be connected with device leading-out terminals respectively, and the device leading-out terminals comprise a common terminal 0, 1N-6N times of terminals. A discharge display lamp and a discharge tube are connected parallelly between every two of the common terminal 0 and the 1N-6N leading-out terminals, a wiring plug is connected with the device leading-out terminals via an experimental line, and the whole amplifying device is placed in an insulating plastic device shell with a box cover. The acquiring and amplifying device of the passive AC micro-current of the present invention enables the work efficiency to be improved substantially, is low in device manufacture cost, and possesses certain application and popularization values.
Description
Technical field
The present invention relates to a kind of electrical equipment electrical parameters measure device field, be specially the micro-current acquisition multiplying arrangement of passive interchange.
Background technology
Along with the continuous increase of social power consumption, large, medium and small transformer station builds up and drops into power transmission successively.Electric power rules regulation, answer on-load to do electrical parameters measure to the equipment after power transmission, common name " phasor analysis ".Whether wiring polarity, group, no-load voltage ratio, the direction that can judge electrical equipment by phasor analysis be correct, guarantees safe and reliable operation after the electrical equipment power transmission.
The phasor analysis product of current each producer, be only applicable to the above secondary current of 0.15～0.2A, for the electric current below 0.15A, measurement result is unstable, there is larger digital drift phenomenon, can not accurately judge no-load voltage ratio, the isoparametric correctness of direction, need wait circuit band certain load just can carry out phasor analysis, sometimes wait for the chronic of user's on-load.In order to ensure the equipment safety operation after power transmission, even take to obtain load current with the method for some useless loads, so occur that the risk of falling the load operation, stand-by period are long, and wasted electric energy.Moreover, after the loop current increase, open-circuit voltage increases, once the work error very easily jeopardizes the person and device security.
Summary of the invention
The objective of the invention is in order to address the above problem, provide a kind of passive interchange micro-current acquisition multiplying arrangement, utilize between the line of circuit itself and the micro-electric current of the unloaded load of ground capacitance, generally below 0.15A, this micro-electric current is carried out to N and doubly optionally amplify analog subscriber band electric load, equipment after power transmission is made to the load electrical parameters measure, common name " phasor analysis ", whether wiring polarity, group, no-load voltage ratio, the direction that can judge electrical equipment by phasor analysis be correct, guarantee safe and reliable operation after the electrical equipment power transmission, safe and efficient.
In order to achieve the above object, the present invention realizes by the following technical solutions:
The micro-current acquisition multiplying arrangement of passive interchange, comprise many winding insulations coil, and the coil tap that extracts respectively the N times of number of turn from coil is connected to the device leading-out terminal, and every grade is extracted coefficient circle N=5; The device leading-out terminal divides public terminal and 1N-6N times of terminal, the different amplification of different terminal corresponding current coils.Between adjacent two device leading-out terminals and be connected to electric discharge display lamp and discharge tube protection, the electric discharge display lamp, during the open circuit electric discharge, luminous prompting staff is dangerous; The protection person and device security, appear when open circuit produces superpotential puncturing in the discharge tube protection.Connection plug line by experiment is connected to each leading-out terminal needed of device, and the most of element of whole multiplying arrangement is placed in the ambroin crust of the device with lid, only has inductive head partly to expose.
The beneficial effect that the present invention has is: little, unloaded for load, become, electric iron wire road and the larger equipment of CT no-load voltage ratio coefficient etc., advantage of the present invention has performed to ultimate attainment especially." gizmo is done great thing " obtained real embodiment in real work at the scene, and aspect saving human and material resources, raising power transmission speed, effect is obvious especially.Simultaneously, direct economic benefit, social benefit and corporate image also are greatly improved, and this installs low cost of manufacture, has certain application and promotional value.
The accompanying drawing explanation
Fig. 1 is single-phase simplex winding formula principle schematic of the present invention;
Fig. 2 is single-phase simplex winding formula of the present invention wiring schematic diagram in kind;
Fig. 3 is three-phase three winding types of the present invention wiring schematic diagrams in kind;
Fig. 4 is single-phase type device field wiring schematic diagram;
Fig. 5 is three-phase type device field wiring schematic diagram.
In figure: the coil of winding insulation more than 1,2 electric discharge display lamps, 3 discharge tube protections, 4 device 0-N leading-out terminals, 5 external connection plugs, 6 test wires, 7 crusts of the device, 8 lids, 9 electric current clamp, 10 analysers, 11, box interior lining panel, 12 anti-collisions/mill outer envelope
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, and single-phase type, the basic electrical principle of three-phase type are identical, below in conjunction with single-phase type, specifically illustrate, and further set forth the present invention.
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 are principle and wiring schematic diagram in kind, take Fig. 2 as example:
The micro-current acquisition multiplying arrangement of passive interchange, the coil tap that extracts respectively the N times of number of turn from many winding insulations coil 1 is connected respectively on device leading-out terminal 4 (0-N), the current N=5 that chooses, device leading-out terminal 4 is divided into public terminal 0,1N-6N times leading-out terminal, the different N times amplification coefficient of different terminal corresponding current coils.Between adjacent two device leading-out terminals 4 (common port 0) and each leading-out terminal (1N-6N) respectively and be connected to discharge display lamp 2 and discharge tube 3; electric discharge display lamp 2; during the open circuit electric discharge, luminous prompting staff is dangerous; discharge tube 3; open circuit punctures while producing superpotential, the protection person and device security.Connection plug 5 line 6 by experiment is connected on device leading-out terminal 4 (0-6N); connection plug 5 is connected on the current terminal in the extrinsic current loop; forbid to open a way; whole multiplying arrangement is placed in the ambroin crust of the device 7 with lid 8; crust of the device 7 adopts ambroin to make; 11 is the box interior lining panel in order to fixing main coil; liner plate top is exposed portions serve electric current main coil only; effectively protective current main coil, discharge tube 3, device leading-out terminal 4 etc.; the 12nd, anti-collision/mill outer envelope, the destruction that protection main coil exposed parts is not subject to the external force such as collision, friction.
With the electric current clamp 9 that are accompanied with output line, in order to the alternating current data collecting, send analyser 10 to process.
Utilize electromagnetic induction principle, make repeatedly equidirectional current flowing clamp 9 of collected electric current, N doubly amplifies the magnetic flux of its generation, and analyser can be measured size and the phase place of micro-electric current exactly.Even in work, error causes secondary current loop open circuit; this device inside is connected to over-voltage protection element; over-voltage protection element can discharge while surpassing 48V, when because of the loop disconnection, when cut-off point produces superpotential, the luminous prompting of overvoltage indicator staff checks loop.Breakdown fuse can be breakdown simultaneously, and the protection person and equipment preserve from.Device has designed single-phase, three-phase type, can be used flexibly according to scene.
Above demonstration and described ultimate principle of the present invention and principal character and advantage of the present invention; the technician of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (1)
1. the micro-current acquisition multiplying arrangement of passive interchange, it is characterized in that, the micro-current acquisition multiplying arrangement of passive interchange, comprise many winding insulations coil, the coil tap that extracts respectively the N times of number of turn from coil is connected to the device leading-out terminal, the device leading-out terminal divides public terminal, 1N-6N times terminal, at public terminal respectively and between each leading-out terminal and be connected to electric discharge display lamp and discharge tube, connection plug line by experiment is connected to the device leading-out terminal, and whole multiplying arrangement is placed in the ambroin crust of the device with lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101907488A CN103424596A (en) | 2013-05-11 | 2013-05-11 | Acquiring and amplifying device of passive AC micro-current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101907488A CN103424596A (en) | 2013-05-11 | 2013-05-11 | Acquiring and amplifying device of passive AC micro-current |
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| CN103424596A true CN103424596A (en) | 2013-12-04 |
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| CN2013101907488A Pending CN103424596A (en) | 2013-05-11 | 2013-05-11 | Acquiring and amplifying device of passive AC micro-current |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353195A (en) * | 2015-12-10 | 2016-02-24 | 国家电网公司 | Passive zero-flux sampling device for CVT leaked current |
| CN108089048A (en) * | 2017-11-14 | 2018-05-29 | 国网山东省电力公司枣庄供电公司 | A kind of low current test device |
Citations (6)
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| EP0499589A1 (en) * | 1991-02-15 | 1992-08-19 | Liaisons Electroniques-Mecaniques Lem S.A. | Device for measuring currents |
| CN1882842A (en) * | 2003-11-27 | 2006-12-20 | 旦菲斯克公司 | A detector circuit to be used for measuring current |
| CN101162243A (en) * | 2007-08-10 | 2008-04-16 | 吴焕雄 | Split stream conducting wire testing apparatus and testing method thereof |
| CN101603980A (en) * | 2009-07-29 | 2009-12-16 | 河北理工大学 | Be used to measure the electronic current mutual inductor and the analog signal processing method of little electric current |
| CN202837368U (en) * | 2012-09-12 | 2013-03-27 | 北京东方计量测试研究所 | AC measuring device superposed large DC bias |
| CN203324397U (en) * | 2013-05-11 | 2013-12-04 | 国家电网公司 | Passive AC micro-current collection amplifying apparatus |
-
2013
- 2013-05-11 CN CN2013101907488A patent/CN103424596A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0499589A1 (en) * | 1991-02-15 | 1992-08-19 | Liaisons Electroniques-Mecaniques Lem S.A. | Device for measuring currents |
| CN1882842A (en) * | 2003-11-27 | 2006-12-20 | 旦菲斯克公司 | A detector circuit to be used for measuring current |
| CN101162243A (en) * | 2007-08-10 | 2008-04-16 | 吴焕雄 | Split stream conducting wire testing apparatus and testing method thereof |
| CN101603980A (en) * | 2009-07-29 | 2009-12-16 | 河北理工大学 | Be used to measure the electronic current mutual inductor and the analog signal processing method of little electric current |
| CN202837368U (en) * | 2012-09-12 | 2013-03-27 | 北京东方计量测试研究所 | AC measuring device superposed large DC bias |
| CN203324397U (en) * | 2013-05-11 | 2013-12-04 | 国家电网公司 | Passive AC micro-current collection amplifying apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105353195A (en) * | 2015-12-10 | 2016-02-24 | 国家电网公司 | Passive zero-flux sampling device for CVT leaked current |
| CN105353195B (en) * | 2015-12-10 | 2018-06-05 | 国家电网公司 | CVT leakage current passive zero flux samplers |
| CN108089048A (en) * | 2017-11-14 | 2018-05-29 | 国网山东省电力公司枣庄供电公司 | A kind of low current test device |
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Application publication date: 20131204 |