CN103852624A - Hand-held convertor transformer core grounding current tester - Google Patents
Hand-held convertor transformer core grounding current tester Download PDFInfo
- Publication number
- CN103852624A CN103852624A CN201410122419.4A CN201410122419A CN103852624A CN 103852624 A CN103852624 A CN 103852624A CN 201410122419 A CN201410122419 A CN 201410122419A CN 103852624 A CN103852624 A CN 103852624A
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- CN
- China
- Prior art keywords
- grounding current
- core grounding
- iron core
- current tester
- filter
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention relates to a hand-held convertor transformer core grounding current tester which comprises a main body and a sensor, wherein the output end of the sensor is connected with a sampling circuit; the output end of the sampling circuit is connected with an amplification circuit; the output end of the amplification circuit is connected with an analog filter I; the output end of the analog filter I is connected with a digital filter; the output end of the digital filter is connected with a singlechip signal amplifier; the output end of the singlechip signal amplifier is connected with an analog filter I, the digital filter and a display; the output end of the analog filter II is connected with the singlechip signal amplifier; a battery is used for supplying power to the components. The tester is flexible and variable in testing range, high in sensitivity and accuracy, comfortable to hold by hand, small in size, light in weight and convenient to carry over.
Description
Technical field
The present invention relates to current tester in a kind of electric system, relate in particular to convertor transformer iron core grounding current tester in a kind of palm, belong to intelligent substation technical field.
Background technology
Transformer core only allows one point earth, if having and above ground connection at 2, forms circulation, causes iron core overheated, and transformer oil is decomposed, and reduces the insulating property of transformer oil.Code regulation transformer iron core grounding current needs detect once every month, and visible ground current test is extremely important.And the range of widely used pincers type reometer is relatively fixed and has directivity in ground current test at present, be difficult to the electric current below Measurement accuracy 100mA, easily produce erroneous judgement, there is accident potential.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, convertor transformer iron core grounding current tester in a kind of palm is provided, solved the problem of the very difficult following electric current of Measurement accuracy 100mA of tester in prior art.
Technical scheme of the present invention is as follows:
Comprise main body and sensor, sensor output terminal connects sample circuit, sample circuit output terminal connects amplifying circuit, amplification circuit output end connecting analog wave filter I, analog filter I output terminal connects digital filter, digital filter output terminal connects single-chip microcomputer signal amplifier, single-chip microcomputer signal amplifier output terminal connecting analog wave filter I, digital filter and display, analog filter II output terminal connects single-chip microcomputer signal amplifier, battery is to the sensor, sample circuit, amplifying circuit, analog filter I, digital filter, single-chip microcomputer signal amplifier, display and analog filter II power supply.
Described sensor is Luo-coil.
Described body shell is T shape.
Described housing upper end arranges binding post, and binding post and Luo-coil extension line match.
Between described binding post and extension line, bolt is flexibly connected.
Described housing is provided with link.
Described display is light-emitting diode display.
Advantageous effect of the present invention is as follows:
1, according to the size of core current, the number of turn of Luo-coil is adjustable, measures range flexible and changeable; Sensitivity and accuracy are high.
2, body shell is T shape, holds comfortablely, and volume is little, and lightweight, housing is provided with link, can directly be hooked on the article such as staff's clothes and kit, is easy to carry.
3, between binding post and extension line, bolt is flexibly connected, and coil and main body are dismantled and assembled, uses and carries flexibly and easily.
, can not there is human body electrification accident in 4, good insulating.
Brief description of the drawings
Fig. 1 is structural representation block diagram of the present invention.
Fig. 2 is on-the-spot test embodiment schematic diagram of the present invention.
In figure, 1, Luo-coil, 2, housing, 3, binding post, 4, link, 5, ground lead.
Embodiment
Referring to accompanying drawing, in conjunction with specific embodiments, describe structure of the present invention in detail.
Embodiment
As shown in Figure 1-2, comprise main body and sensor, sensor is Luo-coil, sensor output terminal connects sample circuit, sample circuit output terminal connects amplifying circuit, amplification circuit output end connecting analog wave filter I, analog filter I output terminal connects digital filter, digital filter output terminal connects single-chip microcomputer signal amplifier, single-chip microcomputer signal amplifier output terminal connecting analog wave filter I, digital filter and light-emitting diode display, analog filter II output terminal connects single-chip microcomputer signal amplifier, battery is to the sensor, sample circuit, amplifying circuit, analog filter I, digital filter, single-chip microcomputer signal amplifier, light-emitting diode display and analog filter II power supply.
Described body shell 2 is T shape, and housing is provided with link 4, and T shape housing upper end arranges binding post 3, and binding post and Luo-coil 1 extension line match, and between binding post and extension line, bolt is flexibly connected.
When use, first Luo-coil is enclosed within on transformer iron core grounding down lead, accurately selects the number of turn of Rossfu's coil cover according to the size of core current, then coil is connected in main body, can accurately record iron core grounding current (10mA-300A).
When work, require temperature between-5 DEG C to 50 DEG C, measuring accuracy ± 1%, in the palm, the weight of convertor transformer iron core grounding current tester is 0.7kg.
The present invention is in the test of 66kV somewhere main transformer, and test data is accurate, and effect is good.
Claims (7)
1. convertor transformer iron core grounding current tester in the palm, it is characterized in that comprising main body and sensor, sensor output terminal connects sample circuit, sample circuit output terminal connects amplifying circuit, amplification circuit output end connecting analog wave filter I, analog filter I output terminal connects digital filter, digital filter output terminal connects single-chip microcomputer signal amplifier, single-chip microcomputer signal amplifier output terminal connecting analog wave filter I, digital filter and display, analog filter II output terminal connects single-chip microcomputer signal amplifier, battery is to the sensor, sample circuit, amplifying circuit, analog filter I, digital filter, single-chip microcomputer signal amplifier, display and analog filter II power supply.
2. convertor transformer iron core grounding current tester in the palm according to claim 1, is characterized in that described sensor is Luo-coil.
3. convertor transformer iron core grounding current tester in the palm according to claim 1, is characterized in that described body shell is T shape.
4. convertor transformer iron core grounding current tester in the palm according to claim 3, is characterized in that described housing upper end arranges binding post, and binding post and Luo-coil extension line match.
5. convertor transformer iron core grounding current tester in the palm according to claim 4, is characterized in that between described binding post and extension line, bolt is flexibly connected.
6. convertor transformer iron core grounding current tester in the palm according to claim 3, is characterized in that described housing is provided with link.
7. convertor transformer iron core grounding current tester in the palm according to claim 1, is characterized in that described display is light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122419.4A CN103852624A (en) | 2014-03-28 | 2014-03-28 | Hand-held convertor transformer core grounding current tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410122419.4A CN103852624A (en) | 2014-03-28 | 2014-03-28 | Hand-held convertor transformer core grounding current tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103852624A true CN103852624A (en) | 2014-06-11 |
Family
ID=50860528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410122419.4A Pending CN103852624A (en) | 2014-03-28 | 2014-03-28 | Hand-held convertor transformer core grounding current tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103852624A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202933A (en) * | 2016-03-16 | 2017-09-26 | 上海日港置信非晶体金属有限公司 | A kind of iron core automatic matching method of utilization Quick Response Code identification |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008298753A (en) * | 2007-06-04 | 2008-12-11 | Kawamura Electric Inc | Leak current sensor and power supply plug |
| CN201886066U (en) * | 2010-12-24 | 2011-06-29 | 大连新安越电力设备有限公司 | Transformer core grounding current monitor |
| US20110286134A1 (en) * | 2010-05-19 | 2011-11-24 | Schneider Electric USA, Inc. | Earth leakage detection module with robust transient suppression |
| CN202583315U (en) * | 2012-05-19 | 2012-12-05 | 保定天腾电气有限公司 | On-line monitoring system for transformer iron core grounding current |
| CN203405510U (en) * | 2013-09-03 | 2014-01-22 | 国家电网公司 | Long-life digital transformer iron core grounding current monitoring device |
| CN203759093U (en) * | 2014-03-28 | 2014-08-06 | 国家电网公司 | Handheld converter transformer core grounding current tester |
-
2014
- 2014-03-28 CN CN201410122419.4A patent/CN103852624A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008298753A (en) * | 2007-06-04 | 2008-12-11 | Kawamura Electric Inc | Leak current sensor and power supply plug |
| US20110286134A1 (en) * | 2010-05-19 | 2011-11-24 | Schneider Electric USA, Inc. | Earth leakage detection module with robust transient suppression |
| CN201886066U (en) * | 2010-12-24 | 2011-06-29 | 大连新安越电力设备有限公司 | Transformer core grounding current monitor |
| CN202583315U (en) * | 2012-05-19 | 2012-12-05 | 保定天腾电气有限公司 | On-line monitoring system for transformer iron core grounding current |
| CN203405510U (en) * | 2013-09-03 | 2014-01-22 | 国家电网公司 | Long-life digital transformer iron core grounding current monitoring device |
| CN203759093U (en) * | 2014-03-28 | 2014-08-06 | 国家电网公司 | Handheld converter transformer core grounding current tester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202933A (en) * | 2016-03-16 | 2017-09-26 | 上海日港置信非晶体金属有限公司 | A kind of iron core automatic matching method of utilization Quick Response Code identification |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140611 |