CN201726200U - Low-voltage phase line grounding remote alarm for 10-20kV transformer - Google Patents
Low-voltage phase line grounding remote alarm for 10-20kV transformer Download PDFInfo
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- CN201726200U CN201726200U CN2010202452513U CN201020245251U CN201726200U CN 201726200 U CN201726200 U CN 201726200U CN 2010202452513 U CN2010202452513 U CN 2010202452513U CN 201020245251 U CN201020245251 U CN 201020245251U CN 201726200 U CN201726200 U CN 201726200U
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Abstract
本实用新型提供一种10～20kV变压器低压相线接地远方报警器，包括接地电流信号采集电路，信号判断电路，开关跳闸电路，报警电路；所述接地电流信号采集电路连接信号判断电路，信号判断电路连接开关跳闸电路、报警电路；当电力低压相线接地时，漏电保护器动作，电源跳闸，同时进行远方报警器，实现在线监测报警，将事故及时报告值班人员，检修人员第一时间到现场能及时进行抢修，缩短事故处理时间，降低职工劳动强度，提高供电量，增加企业及社会效益；同时对配电系统智能化技术发展也起到积极促进作用；该报警器设计科学合理，成本低，结构简单，构思巧妙，使用起来简单方便。
The utility model provides a 10-20kV transformer low-voltage phase wire grounding remote alarm, which includes a grounding current signal acquisition circuit, a signal judgment circuit, a switch trip circuit, and an alarm circuit; the grounding current signal acquisition circuit is connected to a signal judgment circuit, and a signal judgment circuit The circuit is connected to the switch trip circuit and alarm circuit; when the low-voltage phase wire of the power is grounded, the leakage protector will act, the power will trip, and at the same time, the remote alarm will be activated to realize online monitoring and alarm, and the accident will be reported to the duty personnel in time, and the maintenance personnel will arrive at the scene as soon as possible It can carry out emergency repairs in time, shorten the time for handling accidents, reduce the labor intensity of employees, increase the power supply, and increase the benefits of enterprises and society; at the same time, it also plays a positive role in promoting the development of intelligent technology in power distribution systems; the design of the alarm is scientific and reasonable, and the cost is low , Simple in structure, ingenious in conception, simple and convenient to use.
Description
Technical field
The present invention relates to a kind of total protection of distribution transformer secondary side low-voltage circuit electric leakage and distant place alarm technique of being used in, specifically, is a kind of be used for residual current of low-voltage power grid protection and distant place warning.
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; the distribution transformer low-voltage circuit of current operation is owing to can not monitor in real time; but in actual motion; have a power failure behind this RCD would trip; carry out overhaul of the equipments by the user notification maintainer; troubleshooting time of dragging is long like this; the user is had a power failure influence greatly; therefore power supply reliability is low; device damage rate height; can not satisfy the requirement that living standards of the people improve constantly, if can popularize in an all-round way and use the distribution transformer distant place alarm technique that breaks down in service, realize online monitoring intelligent warning.When distribution transformer is in service when breaking down, notify accident at once operator on duty, the maintainer in time rushes to repair to the scene very first time, shortens the accident treatment time, reduces worker's labour intensity, improves amount of power supply, increases enterprise and social benefit.Active promoting function is also played in development to the distribution system intellectualized technology simultaneously.
In order to overcome the above problems, people are seeking a kind of desirable technical solution always.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, thereby provide a kind of design science, cost is low, power supply reliability is high, can overcome existing defective again.
To achieve these goals, the invention provides a kind of 10～20kV transformer low voltage phase line ground connection distant place alarm, comprise the earth current signal acquisition circuit, signal judging circuit, switch trip circuit, warning circuit; Described earth current signal acquisition circuit connects signal judging circuit, and signal judging circuit connects switch trip circuit, warning circuit.
Described earth current signal acquisition circuit comprises a circular iron core, a winding, and described winding is enclosed within on the circular iron core; Scurry into the neutral ground line that distribution transformer secondary low-voltage winding is drawn in the circular iron core of described earth current signal acquisition circuit, described neutral ground line one termination is connected with the neutral point of distribution transformer secondary low-voltage winding, and another termination connects earth electrode; Two terminations of described earth current signal acquisition circuit winding connect the current signal decision circuitry respectively.
Described signal judging circuit comprises an A/D analog-digital converter circuit, calculates decision circuitry, executive component; Described A/D analog-digital converter circuit connects the calculating decision circuitry, calculates decision circuitry and connects executive component, and executive component connects described warning circuit, switch trip circuit respectively.
Described switch trip circuit comprises a breaking coil, the executive component normally opened contact K of described signal judging circuit; Executive component normally opened contact K one end of described signal judging circuit connects power supply L, and the normally opened contact K other end connects described switch trip circuit coil one end, and the switch trip circuit coil other end connects power supply N.
Described warning circuit comprises the optical transmission circuit of fiber optic cables, optical transceiver circuit; Optical transmission circuit changes the signal of telecommunication of distribution transformer low pressure phase line ground connection distant place alarm into light signal and is transmitted to distribution supply intelligent control centre by fiber optic cables.
Described warning circuit comprises two alarm signal input circuits of radio alarming circuit, 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.
The relative prior art of the present invention has outstanding substantive distinguishing features and obvious improvement, and specifically, this device has the following advantages:
1, when low-voltage power line phase line ground connection, can automatic trip and a distant place report to the police, notify accident at once operator on duty, the maintainer in time rushes to repair to the scene very first time, shortens the accident treatment time, reduces worker's labour intensity, improve amount of power supply, increase enterprise and social benefit.Active promoting function is also played in development to the distribution system intellectualized technology simultaneously.
2, this apparatus structure is simple, is skillfully constructed, and design science is reasonable, uses simple and convenient.
Description of drawings
Fig. 1 is the present invention 10～20kV transformer low voltage phase line ground connection distant place alarm structured flowchart;
Fig. 2 is an earth current signal acquisition circuit composition diagram of the present invention
Fig. 3 is a signal judging circuit block diagram of the present invention;
Fig. 4 is this described invention switch trip circuit diagram;
Fig. 5 A is this described invention optical fibre communication cable warning circuit block diagram;
Fig. 5 B is this described invention radio communication warning circuit block diagram;
Embodiment
For making technical scheme of the present invention clearer, the specific embodiment of the present invention is done detailed explanation below in conjunction with accompanying drawing.
As shown in Figure 1, be the present invention 10～20kV transformer low voltage phase line ground connection distant place alarm structured flowchart; Comprise signal acquisition circuit 1, signal judging circuit 2, switch trip circuit 3, warning circuit 4;
Wherein, described signal acquisition circuit connects signal judging circuit, and signal judging circuit connects switch trip circuit, warning circuit respectively.
When the low voltage electric network of being protected has phase ground connection, leakage current is greater than set point, and signal judging circuit starts tripping operation, warning circuit, reports to the police and has a power failure.Maintainer's very first time can in time rush to repair to the scene, shortens the accident treatment time, reduces worker's labour intensity, improves amount of power supply, increases enterprise and social benefit.
Fig. 2 is an earth current signal acquisition circuit structure composition diagram of the present invention, and described earth current signal acquisition circuit comprises a circular iron core, a winding, and described winding is enclosed within on the circular iron core; Scurry into the neutral ground line EN that distribution transformer secondary low-voltage winding is drawn in the circular iron core of described earth current signal acquisition circuit, described neutral ground line EN one termination is connected with the neutral lead of distribution transformer secondary low-voltage winding, and another termination connects earth electrode; It is X, Y that described earth current signal acquisition circuit winding has two terminations, connects signal judging circuit respectively.
When the low voltage electric network generation phase line ground connection of being protected has leakage current, after earth current signal acquisition circuit winding detects leakage current, start warning, trip circuit.
Fig. 3 is a described signal judging circuit block diagram of the present invention, and described signal judging circuit comprises an A/D analog-digital converter circuit 31, calculates decision circuitry (single-chip microcomputer) 32, executive component 33; Described A/D analog-digital converter circuit 31 connects calculating decision circuitry 32, calculates decision circuitry 32 and connects executive components 33, and executive component connects described warning circuit, trip circuit respectively.
When the low voltage electric network generation phase line ground connection of being protected has leakage current; after the earth current signal acquisition circuit detects earth current; input to executive component with detecting after current signal that leakage current inputs to the A/D analog to digital conversion calculates judgement, executive component is reported to the police, is tripped.
Fig. 4 is a switch trip circuit diagram of the present invention, and described switch trip circuit comprises a breaking coil KM, the executive component normally opened contact K of described current signal decision circuitry; Executive component normally opened contact K one end of described current signal decision circuitry connects power supply L, and the normally opened contact K other end connects described switch trip circuit coil KM one end, and the switch trip circuit coil KM other end connects power supply N.
When the low voltage electric network generation phase line ground connection of being protected has leakage current; after the earth current signal acquisition circuit detects earth current; after calculating judgement, current signal that leakage current inputs to the A/D analog to digital conversion inputs to executive component with detecting, the power failure of tripping of the closed starting switch trip circuit of the normally opened contact K of executive component.
Fig. 5 A is this described invention optical fibre communication cable warning circuit block diagram, comprises optical transmission circuit 51, fiber optic cables 52; Optical transmission circuit changes the signal of telecommunication of distribution transformer low pressure phase line ground connection distant place alarm into light signal and is transmitted to distribution supply intelligent control centre by fiber optic cables.
The optical transmission circuit of described optical fibre communication cable warning circuit changes the signal of telecommunication of distribution transformer low pressure phase line ground connection distant place alarm into light signal and is transmitted to distribution supply intelligent control centre by the optical fibre communication cable circuit.When the distribution transformer low pressure phase line generation phase ground of operation, warning circuit carries out a distant place reports to the police, and the operator on duty obtains alarm condition, and the very first time is carried out accident treatment to the scene at once.
Fig. 5 B is this described invention radio communication warning circuit block diagram, and described radio communication warning 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.
Described radio alarming circuit adopts the Internet, mobile phone.
Report to the police if the low voltage electric network phase line generation phase line ground connection of being protected, warning circuit are carried out a distant place, the operator on duty obtains alarm condition, and the very first time is carried out accident treatment to the scene at once.
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 (6)
1. 10～20kV transformer low voltage phase line ground connection distant place alarm is characterized in that: comprise the earth current signal acquisition circuit, signal judging circuit, switch trip circuit, warning circuit; Described earth current signal acquisition circuit connects signal judging circuit, and signal judging circuit connects switch trip circuit, warning circuit.
2. 10～20kV transformer low voltage phase line ground connection according to claim 1 distant place alarm is characterized in that: described earth current signal acquisition circuit, comprise a circular iron core, a winding, and described winding is enclosed within on the circular iron core; Scurry into the neutral ground line that distribution transformer secondary low-voltage winding is drawn in the circular iron core of described earth current signal acquisition circuit, described neutral ground line one termination is connected with the neutral point of distribution transformer secondary low-voltage winding, and another termination connects earth electrode; Two terminations of described earth current signal acquisition circuit winding connect the current signal decision circuitry respectively.
3. 10～20kV transformer low voltage phase line ground connection according to claim 1 distant place alarm is characterized in that: described signal judging circuit, comprise an A/D analog-digital converter circuit, and calculate decision circuitry, executive component; Described A/D analog-digital converter circuit connects the calculating decision circuitry, calculates decision circuitry and connects executive component, and executive component connects described warning circuit, switch trip circuit respectively.
4. 10～20kV transformer low voltage phase line ground connection according to claim 1 distant place alarm, it is characterized in that: described switch trip circuit comprises a breaking coil, the executive component normally opened contact K of described signal judging circuit; Executive component normally opened contact K one end of described signal judging circuit connects power supply L, and the normally opened contact K other end connects described switch trip circuit coil one end, and the switch trip circuit coil other end connects power supply N.
5. 10～20kV transformer low voltage phase line ground connection according to claim 1 distant place alarm, it is characterized in that: described warning circuit comprises the optical transmission circuit of fiber optic cables, optical transceiver circuit; Optical transmission circuit changes the signal of telecommunication of distribution transformer low pressure phase line ground connection distant place alarm into light signal and is transmitted to distribution supply intelligent control centre by fiber optic cables.
6. 10～20kV transformer low voltage phase line ground connection according to claim 1 distant place alarm, it is characterized in that: described warning circuit comprises two alarm signal input circuits of radio alarming circuit, 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 |
|---|---|---|---|
| CN2010202452513U CN201726200U (en) | 2010-06-19 | 2010-06-19 | Low-voltage phase line grounding remote alarm for 10-20kV transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202452513U CN201726200U (en) | 2010-06-19 | 2010-06-19 | Low-voltage phase line grounding remote alarm for 10-20kV transformer |
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| Publication Number | Publication Date |
|---|---|
| CN201726200U true CN201726200U (en) | 2011-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202452513U Expired - Fee Related CN201726200U (en) | 2010-06-19 | 2010-06-19 | Low-voltage phase line grounding remote alarm for 10-20kV transformer |
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| CN (1) | CN201726200U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215824A (en) * | 2014-08-14 | 2014-12-17 | 河南开启电力实业有限公司 | Distribution transformer neutral-conductor ground current detection warning device |
-
2010
- 2010-06-19 CN CN2010202452513U patent/CN201726200U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215824A (en) * | 2014-08-14 | 2014-12-17 | 河南开启电力实业有限公司 | Distribution transformer neutral-conductor ground current detection warning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20110619 |