CN201556935U - Automatic control aftercurrent protector - Google Patents
Automatic control aftercurrent protector Download PDFInfo
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- CN201556935U CN201556935U CN200920279948XU CN200920279948U CN201556935U CN 201556935 U CN201556935 U CN 201556935U CN 200920279948X U CN200920279948X U CN 200920279948XU CN 200920279948 U CN200920279948 U CN 200920279948U CN 201556935 U CN201556935 U CN 201556935U
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- aftercurrent
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- 230000001012 protector Effects 0.000 title abstract description 10
- 238000004804 winding Methods 0.000 claims description 31
- 230000008054 signal transmission Effects 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 230000011664 signaling Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000010792 warming Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model provides an automatic control aftercurrent protector which comprises an aftercurrent detection controller, a current signal intelligent processing circuit, an executive circuit and a wireless warming circuit, wherein the aftercurrent detection controller is connected with the current signal intelligent processing circuit which is connected with the executive circuit; the executive circuit respectively controls a low-voltage load switch and the wireless warming circuit; the device has scientific design and low cost, can automatically control the low-voltage power grid aftercurrent; when a human body contacts an electric power circuit phase line, only a set safe current can pass through the human body, thus being capable of ensuring personal safety no matter what environments and conditions, avoiding electric fire disaster, keeping continuous power supply without wire tripping operation, truly realizing the aim of installing the aftercurrent protector, reducing power grid electric energy loss, reducing labour intensity of workers, improving power supply reliability, and increasing social and enterprise benefits.
Description
Technical field
The utility model relates to the total protection of a kind of 10kV of being used in distribution transformer secondary side low-voltage circuit electric leakage, specifically, is that a kind of low voltage electric network that is used for is controlled residual current operated protective device automatically.
Background technology
At present, technical regulation requirement according to low-voltage power system, in 10kV distribution transformer low-pressure side various types of aftercurrent action protecting equipments have been installed generally, but in actual motion, the protection effect of such protective device is not ideal, main cause is when human body touches phase line ground connection on the power circuit, the voltage that human body bore is current potential relatively, size of current by human body depends on that the human body self situation is (as height, age, fat or thin etc.) and the environment (as: soil resistivity in electric shock place, air humidity, in the water or air medium), can guarantee personal safety also with the action sensitivity of protector, trip time is relevant, because the existence of these situations is difficult to the safety after the assurance person gets an electric shock; And for example some transient faults usually take place in low voltage electric network, scrape branch short etc. as bad weather, strong wind, all will cause the tripping operation of RCD frequent movement, cause power supply reliability to reduce, influence social production activity and daily life electricity consumption, particularly vast rural power grids are even more serious; Under all helpless situations, some places even protector is out of service can't reach the purpose that RCD is installed, and the labour intensity that this has increased the electric power worker virtually also influences the image of electric power enterprise.
In order to overcome the above problems, people are seeking a kind of desirable technical solution always.
Summary of the invention
The utility model is at the deficiencies in the prior art; thereby provide a kind of design science, cost is low, power supply reliability is high, can guarantee the automatic control residual current of low-voltage power grid protector of personal safety again, it has overcome the defective of the frequent tripping operation of existing residual current operated protective device.
To achieve these goals, the invention provides a kind of automatic control residual current of low-voltage power grid protector, comprise that residual current detects controller, current signal Intelligent treatment circuit, radio alarming circuit, on-load switch; Described residual current detects controller and connects current signal Intelligent treatment circuit, and current signal Intelligent treatment circuit is controlled low-voltage load switch, radio alarming circuit respectively.
Described residual current detects controller, comprises a circular iron core, two windings, and described two windings are enclosed within on the circular iron core respectively; Described residual current detects two windings of controller and is respectively winding, secondary winding; Described residual current detects winding of controller two terminations, and a termination is connected with the neutral line that distribution transformer secondary low-voltage winding is drawn, and one time another termination of winding connects earth electrode; Two terminations that described residual current detects the controller secondary winding connect current signal Intelligent treatment circuit respectively.
Described current signal Intelligent treatment circuit comprises an A/D analog-digital converter circuit, calculates decision circuitry, delay circuit, executive component; Described A/D analog-digital converter circuit connects the calculating decision circuitry, calculates decision circuitry and connects delay circuit, and delay circuit connects executive component, and executive component connects described radio alarming circuit, trip circuit respectively.
Described radio alarming circuit comprises two alarm signal input circuits, a signal encoding circuit, a signal transmission circuit; Described two alarm signal input circuits are respectively 1K, 2K, and described alarm signal coding circuit also comprises an A end, a B end, a C end, and described signal transmission circuit has a D end, a F end, a G end, a N end; Described alarm signal input circuit 1K input phase line ground signalling, 2K import trip signal, described radio alarming coding circuit A termination power positive pole, B termination power negative pole, the described signal transmission circuit D end of C termination, described signal transmission circuit G termination power positive pole, N termination power negative pole, F termination transmitting antenna.
The relative prior art of the utility model has outstanding substantive distinguishing features and obvious improvement, and specifically, this device has the following advantages:
1, can control residual current of low-voltage power grid automatically; when the phase line on the human body contact power circuit, can only be in the human body by the safe current that configures, whatsoever environment; any condition can both be guaranteed personal safety; avoided electrical fire, circuit does not trip simultaneously, keeps power supply continuously; really realized installing the purpose of protector; reduce worker's labour intensity, improved power supply reliability, increased the benefit of society and enterprise.
2, this apparatus structure is simple, is skillfully constructed, and design science is reasonable, uses simple and convenient.
Description of drawings
Fig. 1 is an automatic control residual current of low-voltage power grid protector theory structure block diagram of the present utility model;
Fig. 2 is that residual current described in the utility model detects the controller architecture composition diagram
Fig. 3 is a current signal Intelligent treatment schematic block circuit diagram described in the utility model;
Fig. 4 is a radio alarming basic circuit diagram described in the utility model
Embodiment
For making the technical solution of the utility model clearer, embodiment of the present utility model is done detailed explanation below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of automatic control residual current of low-voltage power grid protector theory structure block diagram, comprise that residual current detects controller 1, current signal Intelligent treatment circuit 2, radio alarming circuit 3, trip circuit 4, and by the on-load switch FS of described trip circuit 4 controls, brace 5, distribution transformer TM, distribution transformer secondary winding neutral ground line DN;
Wherein, described residual current detects controller and connects current signal Intelligent treatment circuit, and the executive component of current signal Intelligent treatment circuit is controlled low-voltage load switch, radio alarming circuit respectively.
When the low voltage electric network leakage current of being protected greater than 6mA, current signal Intelligent treatment circuit 2 time-delay started radio alarming circuit 3 in tens seconds, reported to the police; At this moment, if on the circuit accident of human electric shock is taken place, the voltage that human body bore, electric current all are safety values, the protective device power failure of not tripping.
Exist as fault always, the time greater than dozens of minutes (time can be set) after, just start trip circuit 4 as dropping into brace 5, disconnect the FS switch have a power failure (have a power failure as not needing, brace 5 can be opened) report to the police to having a power failure simultaneously.
Fig. 2 is that residual current of the present invention detects the controller architecture composition diagram, and described residual current detects controller and comprises a circular iron core, two windings, and described two windings are enclosed within on the circular iron core respectively; Described two windings are respectively winding, secondary winding, and it is U, V that a described winding has two terminations, and termination U is connected with the neutral line DN that distribution transformer secondary low-voltage winding is drawn, and one time another termination of winding V connects earth electrode; It is X, Y that described residual current detection controller secondary winding has two terminations, connects current signal Intelligent treatment circuit respectively.
When the low voltage electric network generation leakage current of being protected; the winding that residual current detects controller is controlled at leakage current in the 7mA automatically; after the secondary winding of residual current detector detects leakage current, by delayed startup radio alarming circuit or trip circuit.
Fig. 3 is a current signal Intelligent treatment schematic block circuit diagram of the present invention, and described current signal Intelligent treatment circuit comprises an A/D analog-digital converter circuit 1, calculates decision circuitry (single-chip microcomputer) 2, delay circuit 3, executive component 4; Described A/D analog-digital converter circuit 1 connects calculating decision circuitry 2, calculates decision circuitry 2 and connects delay circuits 3, and delay circuit 3 connects executive components 4, and executive component connects described radio alarming circuit, trip circuit respectively.
When the low voltage electric network generation leakage current of being protected; after the secondary winding of residual current detection controller detects; to detect leakage current and input to current signal Intelligent treatment circuit; input to delay circuit after current signal by the A/D analog to digital conversion calculates judgement, by the back of delaying time according to starting radio alarming circuit or trip circuit.
Fig. 4 is a radio alarming basic circuit diagram of the present invention, and described radio alarming circuit comprises two alarm signal input circuits, a signal encoding circuit, a signal transmission circuit; Described two alarm signal input circuits are respectively 1K, 2K, and described alarm signal coding circuit also comprises an A end, a B end, a C end, and described signal transmission circuit has a D end, a F end, a G end, a N end; Described alarm signal input circuit 1K input phase line ground signalling, 2K import trip signal, described radio alarming coding circuit A termination power positive pole, B termination power negative pole, the described signal transmission circuit D end of C termination, described signal transmission circuit G termination power positive pole, N termination power negative pole, F termination transmitting antenna.
If the low voltage electric network leakage current of being protected is greater than 6mA, current signal Intelligent treatment circuit delay started the radio alarming circuit in several seconds, reported to the police; Do not disappear as fault, the time starts trip circuit (also can not drop into the tripping operation brace has a power failure) greater than dozens of minutes (time can be set), disconnects the power failure of FS switch and reports to the police to having a power failure simultaneously.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (4)
1. an automatic control type residual current operated protective device is characterized in that: comprise that residual current detects controller, current signal Intelligent treatment circuit, radio alarming circuit, on-load switch; Described residual current detects controller and connects current signal Intelligent treatment circuit, and current signal Intelligent treatment circuit is controlled low-voltage load switch, radio alarming circuit respectively.
2. automatic control type residual current operated protective device according to claim 1 is characterized in that: described residual current detects controller, comprises a circular iron core, two windings, and described two windings are enclosed within on the circular iron core respectively; Described residual current detects two windings of controller and is respectively winding, secondary winding; Described residual current detects winding of controller two terminations, and a termination is connected with the neutral line that distribution transformer secondary low-voltage winding is drawn, and one time another termination of winding connects earth electrode; Two terminations that described residual current detects the controller secondary winding connect current signal Intelligent treatment circuit respectively.
3. automatic control type residual current operated protective device according to claim 1 is characterized in that: described current signal Intelligent treatment circuit, comprise an A/D analog-digital converter circuit, and calculate decision circuitry, delay circuit, executive component; Described A/D analog-digital converter circuit connects the calculating decision circuitry, calculates decision circuitry and connects delay circuit, and delay circuit connects executive component, and executive component connects described radio alarming circuit, trip circuit respectively.
4. automatic control type residual current operated protective device according to claim 1 is characterized in that: described radio alarming circuit comprises two alarm signal input circuits, a signal encoding circuit, a signal transmission circuit; Described two alarm signal input circuits are respectively 1K, 2K, and described alarm signal coding circuit also comprises an A end, a B end, a C end, and described signal transmission circuit has a D end, a F end, a G end, a N end; Described alarm signal input circuit 1K input phase line ground signalling, 2K imports trip signal, described radio alarming coding circuit A termination power positive pole, B termination power negative pole, the described signal transmission circuit D end of C termination, described signal transmission circuit G termination power positive pole, N termination power negative pole, F termination transmitting antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920279948XU CN201556935U (en) | 2009-12-01 | 2009-12-01 | Automatic control aftercurrent protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920279948XU CN201556935U (en) | 2009-12-01 | 2009-12-01 | Automatic control aftercurrent protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201556935U true CN201556935U (en) | 2010-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920279948XU Expired - Fee Related CN201556935U (en) | 2009-12-01 | 2009-12-01 | Automatic control aftercurrent protector |
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| CN (1) | CN201556935U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017194867A1 (en) * | 2016-05-13 | 2017-11-16 | Hager-Electro Sas | Differential protecting device incorporating a means for isolating a relay or analogous |
| CN110556801A (en) * | 2019-09-11 | 2019-12-10 | 云南电力技术有限责任公司 | power distribution automation FTU locking protection method |
-
2009
- 2009-12-01 CN CN200920279948XU patent/CN201556935U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017194867A1 (en) * | 2016-05-13 | 2017-11-16 | Hager-Electro Sas | Differential protecting device incorporating a means for isolating a relay or analogous |
| FR3051293A1 (en) * | 2016-05-13 | 2017-11-17 | Hager-Electro Sas | DEVICE FOR DIFFERENTIAL PROTECTION INTEGRATING RELAY ISOLATION MEANS OR THE LIKE |
| CN109075562A (en) * | 2016-05-13 | 2018-12-21 | 黑格电子股份有限公司 | Merge the differential protection device of the component for disconnecting relay or similar device |
| CN109075562B (en) * | 2016-05-13 | 2020-11-17 | 黑格电子股份有限公司 | Differential protection device incorporating a component for isolating a relay or the like |
| CN110556801A (en) * | 2019-09-11 | 2019-12-10 | 云南电力技术有限责任公司 | power distribution automation FTU locking protection method |
| CN110556801B (en) * | 2019-09-11 | 2021-07-20 | 云南电力技术有限责任公司 | Power distribution automation FTU locking protection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: YI BAOHUA CHEN LEI Effective date: 20120813 Owner name: HE NAN KAIQI POWER INDUSTRY CO., LTD. Free format text: FORMER OWNER: CHEN JIABIN Effective date: 20120813 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 463000 ZHUMADIAN, HENAN PROVINCE TO: 451162 ZHENGZHOU, HENAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120813 Address after: 451162 Henan City, Zhengzhou, Hong Kong airport on the west side of the road to open the power company Xingang Patentee after: Henan Kaiqi Power Industry Co., Ltd. Address before: 463000, No. two, Lane 144, Yicheng District, Zhumadian, Henan, Jiefang Road Patentee before: Chen Jiabin Patentee before: Yi Baohua Patentee before: Chen Lei |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100818 Termination date: 20141201 |
|
| EXPY | Termination of patent right or utility model |