CN203117264U - Online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors - Google Patents
Online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors Download PDFInfo
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- CN203117264U CN203117264U CN 201320077592 CN201320077592U CN203117264U CN 203117264 U CN203117264 U CN 203117264U CN 201320077592 CN201320077592 CN 201320077592 CN 201320077592 U CN201320077592 U CN 201320077592U CN 203117264 U CN203117264 U CN 203117264U
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- leakage current
- combined overvoltage
- phase combined
- overvoltage protection
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Abstract
The utility model relates to an online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors. The device comprises four three-phase combined overvoltage protection devices and an on-line monitoring component; one ends of three of the three-phase combined overvoltage protection devices are respectively connected with a three-phase bus, the other ends of the three combined overvoltage protection devices are connected to form a neutral point, and one end of the other three-phase combined overvoltage protection device is connected to the neutral point; the on-line monitoring component includes a zero-flux leakage current sensor unit, a leakage current acquisition and processing unit and an alarm and display unit; the other end of the other three-phase combined overvoltage protection device is electrically grounded through the zero-flux leakage current sensor unit; and the zero-flux leakage current sensor unit is further connected to the alarm and display unit through the leakage current acquisition and processing unit. The online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors has the advantages of being used for monitoring a working leakage current value of an alternating-current gapless three-phase combined overvoltage protector, displaying the monitored leakage current value, determining the threshold of the working leakage current value and sounding an alarm.
Description
Technical field
The utility model relates to a kind of on-Line Monitor Device, is applicable to the On-line Monitoring of Leakage Current that exchanges no gap three-phase combination overvoltage protection device.
Background technology
At present, protector all is furnished with on-line monitoring substantially in the market, and operating characteristic is also more stable.But substantially all be to realize the discharging action monitoring; when some special occasions uses; Leakage Current requirement to protector is very high, the excessive operating characteristic that directly has influence on protector of Leakage Current, even can cause protector self collapse to cause the power circuit tripping operation because the protector leakage current is excessive.
For understanding the electric property that exchanges no gap three-phase combination overvoltage protection device; very effective means are exactly the Leakage Current under measuring its ac operation voltage, by the quality of the analysis of each component in the Leakage Current being judged protector and the reason that causes deterioration.
The utility model content
The technical problems to be solved in the utility model is the weak point that overcomes in the existing combination overvoltage protector on-Line Monitor Device technology, provides a kind of interchange simple in structure, easy to use, that be easy to realize not have gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device.
The utility model is achieved in that a kind of interchange do not have gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device, and it comprises:
Four three combined overvoltage protections, wherein, one end of three three combined overvoltage protections is connected with three-phase bus respectively, the other end of these three the three combined overvoltage protections formation neutral point that is electrically connected, an end of three remaining combined overvoltage protections is electrically connected at this neutral point; And
The on-line monitoring parts, it comprises:
Zero flux leakage current sensor unit, the other end of the three combined overvoltage protections that this is remaining is via this zero electrical ground connection in flux leakage current sensor unit;
Leakage current acquisition process unit, one end are electrically connected at this zero flux leakage current sensor unit; And
Report to the police and display unit, it is electrically connected at the other end of this leakage current acquisition process unit.
As the further improvement of such scheme, this leakage current acquisition process unit is single-chip microcomputer.
As the further improvement of such scheme, this warning and display unit are LCD display.
Beneficial effect with respect to prior art is; one; the on-line monitoring parts that adopt zero flux leakage current sensor unit, leakage current acquisition process unit and warning between gapless three combined overvoltage protections and the ground and display unit to form; the zero flux leakage current sensor that utilizes cover to be through in the protection branch road obtains protector operation hourglass current variation, has reflected the operation conditions of protector at any time.This leakage current value produces unusual reason to be used for analyzing protector, with trouble-saving generation, can judge whether protector has fault or protector aging conditions whether to occur; Also can detect the serviceable life that exchanges no gap three-phase combination overvoltage protection device self; Can effectively detect abnormal conditions such as lightning arrester internal wetted or resistor disc are aging, avoid it to continue deterioration and cause a serious accident.Its two, simple in structure, practical, use also very convenient and directly perceived.Its three, non-physical connection monitoring mode, work does not exert an influence to protector, guarantees personal safety effectively and device security.
Description of drawings
Fig. 1 provides the structural representation that exchanges no gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device for the utility model preferred embodiments.
Main symbol description: three combined overvoltage protections 1,2,3,5; On-line monitoring parts 6; Zero flux leakage current sensor unit 61; Leakage current acquisition process unit 62; Report to the police and display unit 63; Three-phase bus A, B, C.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
See also Fig. 1, its interchange that provides for the utility model preferred embodiments does not have the structural representation of gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device, exchanges no gap three-phase and makes up overvoltage protection device leakage current on-Line Monitor Device and comprise: four three combined overvoltage protections 1,2,3,5; And on-line monitoring parts 6.On-line monitoring parts bag 6 comprises zero flux leakage current sensor unit 61, leakage current acquisition process unit 62 and warning and display unit 63.
Three three combined overvoltage protections 1, an end of 2,3 are connected with three-phase bus A, B, C respectively; these three three combined overvoltage protections 1,2,3 the other end are electrically connected and form neutral point 4; one end of three remaining combined overvoltage protections 5 is electrically connected at this neutral point 4, and the other end of the three combined overvoltage protections 5 that this is remaining is via these zero flux leakage current sensor unit 61 electrical ground connection.
One end of leakage current acquisition process unit 62 is electrically connected at this zero flux leakage current sensor unit 61, and the other end of leakage current acquisition process unit 62 is electrically connected at reports to the police and display unit 63.Leakage current acquisition process unit 62 can be single-chip microcomputer and adopts latest digital treatment technology and microcontroller embedded technology, can handle this information of calculating accurately, in real time.Report to the police and display unit 63 can be LCD display, the realization user function of checking and handle accordingly is write leakage current and is met or exceeded the setting threshold value when monitoring protector, and on-Line Monitor Device is sent actuation of an alarm.
On-Line Monitor Device is that three combined overvoltage protections 1 between three-phase bus A, B, C and ground of on-line monitoring parts 6 and cross-over connection, 2,3,5 Leakage Current carry out on-line monitoring; and monitoring is exchanged the work Leakage Current value thresholding that no gap three-phase makes up overvoltage protection device judge, send warning.
Under the situation that does not contain harmonic wave or protector operational excellence in the system; three-phase current fundametal compoment vector and be zero; remaining third harmonic zero-sequence current I0 only in the ground lead; experiment draws; this value is being that 30uA is between the 60uA under the 35KV electric pressure; for guaranteeing that this device is to the degree of accuracy of the collection of this value; adopted perforation formula zero flux leakage current sensor; this sensor is selected the initial permeability height for use; the little permalloy of loss is done iron core; adopted unique degree of depth negative-feedback technology and unique shielding measure, can automatically compensate iron core, made iron core be operated in desirable zero magnetic flux state.If the unbalancedness of line voltage or protector sleeve surface humidity and protector self are aging, the Leakage Current of protector can be higher than 60uA, even can reach more than the 200uA, so monitoring accuracy can be higher, the leakage current value that monitors is more accurate.
Obviously, the person skilled of this area can not have gap three-phase combination overvoltage protection device on-Line Monitor Device to interchange of the present utility model and carries out various changes and modification and do not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (3)
1. one kind exchanges no gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device, it is characterized in that it comprises:
Four three combined overvoltage protections, wherein, one end of three three combined overvoltage protections is connected with three-phase bus respectively, the other end of these three the three combined overvoltage protections formation neutral point that is electrically connected, an end of three remaining combined overvoltage protections is electrically connected at this neutral point; And
The on-line monitoring parts, it comprises:
Zero flux leakage current sensor unit, the other end of the three combined overvoltage protections that this is remaining is via this zero electrical ground connection in flux leakage current sensor unit;
Leakage current acquisition process unit, one end are electrically connected at this zero flux leakage current sensor unit; And
Report to the police and display unit, it is electrically connected at the other end of this leakage current acquisition process unit.
2. interchange as claimed in claim 1 does not have gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device, it is characterized in that this leakage current acquisition process unit is single-chip microcomputer.
3. interchange as claimed in claim 1 does not have gap three-phase combination overvoltage protection device leakage current on-Line Monitor Device, it is characterized in that this warning and display unit are LCD display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320077592 CN203117264U (en) | 2013-02-19 | 2013-02-19 | Online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320077592 CN203117264U (en) | 2013-02-19 | 2013-02-19 | Online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203117264U true CN203117264U (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320077592 Expired - Fee Related CN203117264U (en) | 2013-02-19 | 2013-02-19 | Online leakage current monitoring device for alternating-current gapless three-phase combined overvoltage protectors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203117264U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126001A (en) * | 2021-04-20 | 2021-07-16 | 广东电网有限责任公司 | Electromagnetic monitoring system and method |
| CN113376470A (en) * | 2021-07-08 | 2021-09-10 | 广西电网有限责任公司电力科学研究院 | Remote monitoring system for running state of lightning protection device |
-
2013
- 2013-02-19 CN CN 201320077592 patent/CN203117264U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113126001A (en) * | 2021-04-20 | 2021-07-16 | 广东电网有限责任公司 | Electromagnetic monitoring system and method |
| CN113376470A (en) * | 2021-07-08 | 2021-09-10 | 广西电网有限责任公司电力科学研究院 | Remote monitoring system for running state of lightning protection device |
| CN113376470B (en) * | 2021-07-08 | 2022-11-22 | 广西电网有限责任公司电力科学研究院 | Remote monitoring system for running state of lightning protection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230031 No. 99 Yonghe Road, hi tech Zone, Anhui, Hefei Patentee after: Anhui electric technology Limited by Share Ltd Address before: 230031 No. 99 Yonghe Road, hi tech Zone, Anhui, Hefei Patentee before: Anhui Yitian Electrical Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20180219 |