CN203396835U - Monitoring and alarming system for grounding current of single-core cable - Google Patents
Monitoring and alarming system for grounding current of single-core cable Download PDFInfo
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- CN203396835U CN203396835U CN201320467613.7U CN201320467613U CN203396835U CN 203396835 U CN203396835 U CN 203396835U CN 201320467613 U CN201320467613 U CN 201320467613U CN 203396835 U CN203396835 U CN 203396835U
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Abstract
The utility model relates to a monitoring and alarming system for the grounding current of a single-core cable, which comprises a current detecting unit, and a signal detecting unit used for processing current detection signals. The current detecting unit is composed of a current sensor, a protection circuit and a rectification circuit, wherein the current sensor, the protection circuit and the rectification circuit are successively connected together. The signal detecting unit is composed of an A/D conversion circuit, a single-chip microcomputer and a GPRS communication module. The rectification circuit is subsequently connected with the A/D conversion circuit. The A/D conversion circuit is connected with the single-chip microcomputer of the signal detecting unit. Preset reduced parameters are stored in the single-chip microcomputer, and the single-chip microcomputer compares the preset reduced parameters with current data acquired by the current detecting unit. The single-chip microcomputer is subsequently connected with the GPRS communication module and then is connected with a remote monitoring terminal through a wireless network. According to the technical scheme of the utility model, due to the adoption of the monitoring and alarming system, the detecting, monitoring, early-warning and precaution-taking operations on the current of any unit at any time can be realized. Meanwhile, since the manual operation is no longer needed, the missing detection phenomenon is avoided. The operation safety coefficient of the cable is improved at the same time.
Description
Technical field
The utility model relates to a kind of single core cable ground current monitoring and warning system.
Background technology
In defeated, distribution cable circuit, three-phase single core cable, because it is in insulation and lay aspect convenient and have greater advantage compared with three-phase triple cable, be therefore widely used, but it is having higher requirements again aspect shielding layer grounding and oversheath insulation at present.In actual motion due to the insulation of shielding layer grounding and oversheath think little of cause a large amount of cables to burn even cable short circuit accident.The three-phase triple cable during fabrication screen layer of its three-phase is all produced with cable together spiral wring, when cable moves, the electromagnetic field of its generation of the three-phase main-frequency electricity induced voltage in copper shield of cancelling out each other is zero substantially, even so copper shield have multipoint earthing also can not produce induction current.Even and single-phase cable lay into Chinese character pin-shaped in power frequency operation situation its three-phase electricity magnetic field also can not offset completely, will on copper shield, produce induced voltage, if now copper shield occurs that 2 ground connection will form a faradic circulation channel.Copper shield global sections very little but its by being greater than the electric current of the current-carrying capacity destruction major insulation of can generating heat, finally cause cable singlephase earth fault to affect circuit and normally move.Single core cable requires the direct ground connection of sending end screen layer while installing; and the other end is through overvoltage protector ground connection; while working like this, can not form circulation at screen layer; but its screen layer will have more an earth point when cable occurs that oversheath is damaged, this earth point just and sending end ground connection formed circulation channel generation hidden danger.
Conventionally the prevention method of taking is that the ground wire of cable sending end screen layer is regularly carried out to current detecting, when finding that there is electric current, flows through and illustrates that hidden danger produces, and needs to arrange in time to check that oversheath insulate and finds out breaking point and carry out repair process.The means of making regular check at present electric current are all with clamp on amperemeter, to detect by patrol officer, and this detection methods exists certain threat to personal safety, the very complicated and detection accuracy of work formality and property is all poor constantly.
Summary of the invention
It is artificial that the purpose of this utility model is to propose a kind of replacement, and automaticity is high, can to the ground wire of any cable sending end screen layer, carry out at any time the monitoring of single core cable ground current and the warning system of current detecting, monitoring, early warning and prevention.
The purpose of this utility model is achieved in that the monitoring of single core cable ground current and warning system, comprise current detecting unit, in order to process the detecting signal unit of current detection signal, current detecting unit comprises current sensor, with after current sensor, be connected successively with holding circuit and rectification circuit, detecting signal unit comprises A/D conversion circuit, single-chip microcomputer and GPRS communication module, after rectification circuit, connect A/D conversion circuit, A/D conversion circuit is connected with the single-chip microcomputer in detecting signal unit, default reduced parameter in single-chip microcomputer, the current data of extracting with current detecting unit contrasts.After single-chip microcomputer, connect GPRS communication module, by wireless network, be connected with remote monitoring terminal.
The utility model carries out current detecting by current detecting unit to the ground wire of cable sending end screen layer, testing result is sent to remote monitoring terminal by wireless network, and data acquisition server is entered in typing, thereby can realize any unit, carry out at any time the object of current detecting, monitoring, early warning and prevention, replaced manually, stopped undetectedly, improved the safe operation coefficient of cable.
Accompanying drawing explanation: concrete structure of the present utility model is provided by following drawings and Examples:
Fig. 1 is the monitoring of single core cable ground current and warning system structural representation.
Embodiment:
The utility model is not subject to the restriction of following embodiment, can determine concrete embodiment according to the technical solution of the utility model and actual conditions.
Embodiment: as shown in Figure 1; the monitoring of single core cable ground current and warning system comprise current detecting unit; in order to process the detecting signal unit of current detection signal; current detecting unit comprises current sensor; with after current sensor, be connected successively with holding circuit and rectification circuit, detecting signal unit comprises A/D conversion circuit, single-chip microcomputer and GPRS communication module.After rectification circuit, connect A/D conversion circuit (being analog digital conversion circuit), A/D conversion circuit is connected with the single-chip microcomputer in detecting signal unit, default reduced parameter in single-chip microcomputer, and the current data of extracting with current detecting unit contrasts.After single-chip microcomputer, connect GPRS communication module, by the current data of contrast by wireless network transmissions to remote monitoring terminal, and be stored in data acquisition server.Corresponding program is set in remote monitoring terminal, if the current data of contrast is undesired, gives the alarm.
First current detecting unit of the present utility model is mounted on cable shielding layer earthing line, utilizes private cable that current detecting unit is connected with detecting signal unit.Secondly on detecting signal unit, by the order of connection, input corresponding cable address name and call mutually (A, B, C), and corresponding address input is greater than the alarming value of zero point drift electric current accordingly.Finally with relay protection effect instrument or other current feedback circuits, on shielding layer grounding line, add measuring current; whether the current value gathering on comparison detecting signal unit warning whether accurate, remote monitoring terminal starts, and whether while effect address name and mutually another name be actual corresponding.
Above technical characterictic has formed most preferred embodiment of the present utility model, and it has stronger adaptability and best implementation result, can increase and decrease according to actual needs inessential technical characterictic.
Claims (1)
1. a single core cable ground current is monitored and warning system, it is characterized in that: comprise current detecting unit, in order to process the detecting signal unit of current detection signal, current detecting unit comprises current sensor, with after current sensor, be connected successively with holding circuit and rectification circuit, detecting signal unit comprises A/D conversion circuit, single-chip microcomputer and GPRS communication module, after rectification circuit, connect A/D conversion circuit, A/D conversion circuit is connected with the single-chip microcomputer in detecting signal unit, default reduced parameter in single-chip microcomputer, the current data of extracting with current detecting unit contrasts, after single-chip microcomputer, connect GPRS communication module, by wireless network, be connected with remote monitoring terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467613.7U CN203396835U (en) | 2013-08-01 | 2013-08-01 | Monitoring and alarming system for grounding current of single-core cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320467613.7U CN203396835U (en) | 2013-08-01 | 2013-08-01 | Monitoring and alarming system for grounding current of single-core cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203396835U true CN203396835U (en) | 2014-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320467613.7U Expired - Fee Related CN203396835U (en) | 2013-08-01 | 2013-08-01 | Monitoring and alarming system for grounding current of single-core cable |
Country Status (1)
| Country | Link |
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| CN (1) | CN203396835U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793108A (en) * | 2015-05-08 | 2015-07-22 | 国网上海市电力公司 | Discrete low-voltage failure cable identification device |
| CN107797029A (en) * | 2017-10-23 | 2018-03-13 | 贵州开磷集团股份有限公司 | A kind of picking method that failure cable is chosen in a plurality of parallel high-tension cable |
| CN111337727A (en) * | 2020-03-05 | 2020-06-26 | 山东泰开互感器有限公司 | Current transformer and cloud computing-based current transformer information interaction system |
-
2013
- 2013-08-01 CN CN201320467613.7U patent/CN203396835U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104793108A (en) * | 2015-05-08 | 2015-07-22 | 国网上海市电力公司 | Discrete low-voltage failure cable identification device |
| CN107797029A (en) * | 2017-10-23 | 2018-03-13 | 贵州开磷集团股份有限公司 | A kind of picking method that failure cable is chosen in a plurality of parallel high-tension cable |
| CN111337727A (en) * | 2020-03-05 | 2020-06-26 | 山东泰开互感器有限公司 | Current transformer and cloud computing-based current transformer information interaction system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20210801 |
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| CF01 | Termination of patent right due to non-payment of annual fee |