CN204154785U - Flexible pincerlike current tester - Google Patents
Flexible pincerlike current tester Download PDFInfo
- Publication number
- CN204154785U CN204154785U CN201420520871.1U CN201420520871U CN204154785U CN 204154785 U CN204154785 U CN 204154785U CN 201420520871 U CN201420520871 U CN 201420520871U CN 204154785 U CN204154785 U CN 204154785U
- Authority
- CN
- China
- Prior art keywords
- test arm
- current
- amperemeter
- clamp
- pincerlike
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 238000012360 testing method Methods 0.000 claims abstract description 40
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 6
- 230000035699 permeability Effects 0.000 claims abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 229910052742 iron Inorganic materials 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Flexible pincerlike current tester, it comprises one with the clamp on amperemeter of pincerlike test arm, the tester signal input port signal wire of described clamp on amperemeter is connected with the annular test arm of a special configuration, and when testing, the loop plane normal of measured conductor and annular test arm is settled, and makes measured conductor be on the center of plane of a loop; Described annular test arm adopts high permeability material to make, and is wound with the coil of connection signal line in the outside of the annular ring of described annular test arm; It is simple that it has structure, easy to use and reliable, can realize the features such as test different size current－carrying conductor size of current.
Description
Technical field
The utility model relates to a kind of flexible pincerlike current tester, belong in electric system the special purpose device measuring direct current or AC current value.
Background technology
When meeting with DC magnetic biasing, transformer magnetizing current and harmonic wave will sharply increase, iron core cutter, and temperature rise, noise and vibration increase and produce higher hamonic wave, the safe and stable operation of harm transformer and electric system.In electric system, generally by the DC current that clamp on amperemeter test neutral point flows into.In the past during DC line monopolar operation, above-mentioned transforming plant main transformer neutral point direct current cannot be measured because clamp on amperemeter jaw diameter is little, the extent of injury of DC magnetic biasing to transformer can not be assessed in time.
Clamp on amperemeter is commonly used to the size measuring interchange or the DC current values passed through in through-flow conductor in electric system.Clamp on amperemeter operation element is magnetic balancing current sensor, and the magnetic field that the magnetic field that during measurement, primary current produces at magnetism gathering rings place is produced by a secondary current compensates, and its offset current reflects the size of primary current accurately.But clamp on amperemeter jaw size is fixed often, the requirement of test different size conductor current can not be met, as measured the electric current of large diameter cable and transformer grounding band iron.Existing solution is generally purchases bigbore clamp on amperemeter, but can not solve the demand that clamp on amperemeter is suitable for various sizes conductor completely, and acquisition cost costliness cannot be popularized.
Utility model content
The purpose of this utility model is the deficiency overcoming prior art existence, and provides a kind of structure simple, easy to use and reliable, can realize the pincerlike current tester of flexibility testing different size current－carrying conductor size of current; It not only extends the measuring object of clamp on amperemeter, and solves the hidden danger etc. that transformer core grounding flat iron grounding electric current is difficult to measure, and effectively can improve converting equipment safe and stable operation ability, reduce defect probability of happening.
The purpose of this utility model has been come by following technical solution, it comprises one with the clamp on amperemeter of pincerlike test arm, it is characterized in that the tester signal input port signal wire of described clamp on amperemeter is connected with the annular test arm of a special configuration, and when testing, the loop plane normal of measured conductor and annular test arm is settled, and measured conductor is on the center of plane of a loop.
Described annular test arm adopts high permeability material to make, and is wound with the coil of connection signal line in the outside of the annular ring of described annular test arm.
The utility model can be used for measuring large-sized current－carrying conductor, and the ground current of through-flow, the transformer core grounding band iron of power cable as larger in diameter, transformer neutral point ground connection band iron is through-flow, can meet the work requirements that this type of equipment live detects; It is dual-purpose that it can meet AC-DC, detects, take the uncertainty of the test value under different test arm to be all less than 3% through accuracy; There is structure simple, easy to use and reliable, the features such as test different size current－carrying conductor size of current can be realized.
Accompanying drawing explanation
Fig. 1 is use structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in detail: shown in Fig. 1, the utility model comprises one with the clamp on amperemeter 2 of pincerlike test arm 1, the tester signal input port 3 of described clamp on amperemeter 2 is connected with the annular test arm 5 of a special configuration with signal wire 4, and when testing, the loop plane normal of measured conductor 6 with annular test arm 5 is settled, and measured conductor 6 is on the center of plane of a loop.
Annular test arm 5 described in the utility model adopts high permeability material to make, and is wound with the coil 7 of connection signal line in the outside of the annular ring of described annular test arm.
The utility model is on the basis of existing clamp on amperemeter, special configuration one can with tested object size adjustable jaw, a pincerlike test arm, realize the object of the size of current of test different size current－carrying conductor, and constitute described flexible clamp on amperemeter.
Described jaw is the current acquisition parts of clamp on amperemeter, and material is high permeability material, its outside winding around.When for external heavy caliber annular test arm during large scale current－carrying conductor; When measuring small size current－carrying conductor, select small-bore annular test arm.
During detection, the size according to measured conductor selects corresponding annular test arm, opens jaw in order to vise measured conductor, test arm is connected by test signal line with tester; Guarantee that tested conductor is vertical with test arm, and conductor is in center; Open instrument power source, read the test value after stablizing.
Claims (2)
1. flexible pincerlike current tester, it comprises one with the clamp on amperemeter of pincerlike test arm, it is characterized in that the tester signal input port signal wire of described clamp on amperemeter is connected with the annular test arm of a special configuration, and when testing, the loop plane normal of measured conductor and annular test arm is settled, and measured conductor is on the center of plane of a loop.
2. the pincerlike current tester of flexibility according to claim 1, is characterized in that described annular test arm adopts high permeability material to make, is wound with the coil of connection signal line in the outside of the annular ring of described annular test arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420520871.1U CN204154785U (en) | 2014-09-11 | 2014-09-11 | Flexible pincerlike current tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420520871.1U CN204154785U (en) | 2014-09-11 | 2014-09-11 | Flexible pincerlike current tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204154785U true CN204154785U (en) | 2015-02-11 |
Family
ID=52512887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420520871.1U Expired - Fee Related CN204154785U (en) | 2014-09-11 | 2014-09-11 | Flexible pincerlike current tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204154785U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297549A (en) * | 2014-09-11 | 2015-01-21 | 国家电网公司 | Flexible pliers-shaped current tester |
-
2014
- 2014-09-11 CN CN201420520871.1U patent/CN204154785U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104297549A (en) * | 2014-09-11 | 2015-01-21 | 国家电网公司 | Flexible pliers-shaped current tester |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150211 Termination date: 20200911 |