CN203037725U - On-line monitoring device for iron core grounding current - Google Patents
On-line monitoring device for iron core grounding current Download PDFInfo
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- CN203037725U CN203037725U CN 201220645607 CN201220645607U CN203037725U CN 203037725 U CN203037725 U CN 203037725U CN 201220645607 CN201220645607 CN 201220645607 CN 201220645607 U CN201220645607 U CN 201220645607U CN 203037725 U CN203037725 U CN 203037725U
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- current
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- iron core
- core grounding
- electric current
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Abstract
The utility model relates to the technical field of transformer core grounding monitoring, more particularly to an on-line monitoring device for an iron core grounding current. The on-line monitoring device is composed of current transducers, a current distributor, a processor, and alarms. There are two current transducers: one with a measurable range of 0 to 1 A and the other with a measurable range of 0 to 10A; the output terminals of the two current transducers are connected with the signal input terminal of the current distributor by circuits; and the signal output terminal of the current distributor is connected with the processor by a circuit. And two alarms are arranged totally; the processor is respectively connected with the two alarms by circuits and is also connected with a display by a circuit. The provided device has the characteristics of reasonable structure, convenient usage, wide measuring range, and high measuring precision.
Description
Technical field
The utility model relates to a kind of transformer core grounding monitor technical field, specifically a kind of iron core grounding electric current on-Line Monitor Device.
Background technology
Along with national intelligent grid construction and universal, every index request to electrical network is more and more higher, in country's intelligent grid planning, iron core grounding on-line monitoring project is listed in the transformer online monitoring bulleted list, the importance of iron core grounding electric current on-line monitoring has been described.The producer of domestic production iron core grounding electric current on-line monitoring is not a lot of at present.And often the expensive precision of price comparison is not very high.Because the transformer core ground current is very large in the numerical value change of normal operating condition and malfunction, the iron core grounding electric current has only a milliampere level (100mA is following) under the normal condition, under the malfunction, the iron core grounding electric current rises to ampere level (tens peaces).At present, the iron core grounding electric current on-Line Monitor Device of other producer often can not guarantee the accuracy of normal operation and the following current value of surveying of fault two states.
Summary of the invention
The utility model provides a kind of rational in infrastructure, easy to use in order to overcome above-mentioned defective, and measurement range is wide, the iron core grounding electric current on-Line Monitor Device that measuring accuracy is high.
[0004]The technical solution adopted in the utility model is: a kind of iron core grounding electric current on-Line Monitor Device, it is characterized in that: comprise current transducer, processor, described current transducer is two, one of them range is 0-1A, another range is 0-10A, the output terminal of two current transducers all is connected with processor by circuit, processor has two warning contacts, one for sending alerting signal during less than the signal of 400mA when the iron core grounding electric current greater than 100mA, another is for sending alerting signal during greater than the 400mA signal when the iron core grounding electric current, two warning contacts of processor are connected with warning device by circuit respectively, and processor also is connected with display by circuit.
In the utility model, described processor is provided with the RS485 signaling interface.
The current transducer of the utility model by being provided with two different ranges is to the ground current on-line monitoring of iron core, and sending processor to after the current signal conversion, processor is selected different warning contacts to report to the police respectively and is shown data message by display according to different situations after to the signal contrast analysis.No matter the utility model is the degree of accuracy that normal operating condition or malfunction can guarantee the current value of surveying by adopting the current transducer of two kinds of different ranges.
Description of drawings
Fig. 1 is synoptic diagram of the present utility model.
Embodiment
Now by reference to the accompanying drawings the utility model is further described, Fig. 1 is a kind of embodiment of the present utility model, comprise current transducer 1, processor 2 and display 3, described current transducer 1 is two, one of them range is 0-1A, another range number is 0-10A, two current transducers 1 are all exported the 4-20mA signal, the signal output part of two current transducers 1 all connects by line handling device 2, processor 2 has two warning contacts 4, one for sending alerting signal during less than the signal of 400mA when the iron core grounding electric current greater than 100mA, another is for sending alerting signal during greater than the 400mA signal when the iron core grounding electric current, two warning contacts 4 of processor 2 are connected with warning device by circuit respectively, warning device in the present embodiment is two alarm lamps, one of them is the yellow alarm lamp, and another is the red alarm lamp, and processor 2 also is connected with display 3 by circuit.
The utility model is installed in the current transducer 1 of two different ranges on the cable that attracts from the ground connection copper bar.When current value is in the 0-1A scope, the current transducer 1 of 0-1A carries out work, when current value is in the 1-10A scope, 0-10A current transducer 1 carries out work, the current transducer 1 of work operation sends monitored signal to processor 2 with the form of analog quantity, pass through routine processes, processor 2 also connects display 3, can show real-time iron core grounding current data on the spot, and have operation push-button, precision, time can be set, and can check historical data, the user just not only can be real-time the current value of demonstration on the spot, and monitoring accuracy height.It is switching value that processor 2 can be exported the two-way alarm contact, for selecting for use on the backstage, in the present embodiment, when the iron core grounding electric current that monitors greater than 100mA during less than 400mA, processor 2 control yellow alarm lamp closures, when iron core grounding electric current during greater than 400mA, the red alarm closure, different strength of current is carried out different alarm indications, is user-friendly to.Processor 2 also can provide accurate RS485 signal in addition.
The utlity model has rational in infrastructurely, easy to use, measurement range is wide, the characteristics that measuring accuracy is high.
Claims (2)
1. iron core grounding electric current on-Line Monitor Device, it is characterized in that: comprise current transducer, processor, described current transducer is two, one of them range is 0-1A, another range is 0-10A, the output terminal of two current transducers all is connected with processor by circuit, processor has two warning contacts, one for sending alerting signal during less than the signal of 400mA when the iron core grounding electric current greater than 100mA, another is for sending alerting signal during greater than the 400mA signal when the iron core grounding electric current, two warning contacts of processor are connected with warning device by circuit respectively, and processor also is connected with display by circuit.
2. iron core grounding electric current on-Line Monitor Device according to claim 1, it is characterized in that: described processor is provided with the RS485 signaling interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220645607 CN203037725U (en) | 2012-11-30 | 2012-11-30 | On-line monitoring device for iron core grounding current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220645607 CN203037725U (en) | 2012-11-30 | 2012-11-30 | On-line monitoring device for iron core grounding current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037725U true CN203037725U (en) | 2013-07-03 |
Family
ID=48689836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220645607 Expired - Fee Related CN203037725U (en) | 2012-11-30 | 2012-11-30 | On-line monitoring device for iron core grounding current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203037725U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717349A (en) * | 2014-12-02 | 2016-06-29 | 国家电网公司 | Grounding current on-line monitoring device and grounding current on-line monitoring method |
-
2012
- 2012-11-30 CN CN 201220645607 patent/CN203037725U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717349A (en) * | 2014-12-02 | 2016-06-29 | 国家电网公司 | Grounding current on-line monitoring device and grounding current on-line monitoring method |
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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: 20130703 Termination date: 20141130 |
|
| EXPY | Termination of patent right or utility model |