CN202034228U - Open-type electronic-type current transformer - Google Patents
Open-type electronic-type current transformer Download PDFInfo
- Publication number
- CN202034228U CN202034228U CN2011200581285U CN201120058128U CN202034228U CN 202034228 U CN202034228 U CN 202034228U CN 2011200581285 U CN2011200581285 U CN 2011200581285U CN 201120058128 U CN201120058128 U CN 201120058128U CN 202034228 U CN202034228 U CN 202034228U
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- CN
- China
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- secondary winding
- current transformer
- type
- printed panel
- converting unit
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Abstract
The utility model relates to an open-type electronic-type current transformer and is formed by connecting a secondary winding and a secondary converting unit. The secondary winding is formed by connecting two C-type printing plates in butt joint mode, and each C-type printing plate is evenly, vertically and fixedly provided with more than three small surface mount devices at intervals. The two C-type printing plates are respectively provided with return circuits formed by sequentially connecting more than three small surface mount devices in series, two return circuits on the two C-type printing plates are connected through shielded twisted pairs, and an outgoing line end of the secondary winding is connected with the secondary converting unit through the shielded twisted pairs to realize output measurement and guard signals. One end of the current transformer is movably connected, and the other end of the current transformer can be opened, thereby being convenient in whole processing, high in accuracy and wide in frequency band range and having no magnetic saturation and no secondary open circuit high voltage danger. A hollow coil current transformer can be used by opening and closing, thereby being safe, convenient, fast, applicable to current measurement and relay protection of electric power systems which has a voltage level at 35 kilovolts or below and wide in application range.
Description
Technical field
The utility model relates to a kind of current transformer, but is the electronic current mutual inductor that a kind of folding is measured specifically, is applicable to the current measurement and the relaying protection of 35kV and following electric pressure electric power system.
Background technology
Current transformer is widely used in the measurement and the protection of electric power system, is one of visual plant in the electric power system, and its reliability and accuracy are to safe, the stable and economical operation important influence of electric power system.Development along with electric power digitalization, miniaturization and automation, but the electromagnetic current transducer CT of traditional folding adopts on the silicon steel sheet coiling through the epoxy resin cutting of being honored as a queen admittedly, be assembled into complete current transformer again, this kind structure exposes that volume is big, magnetic saturation, magnetic resonance, defectives such as dynamic range is little and frequency band is narrow, low precision, is difficult to satisfy the demand of power system development of new generation.In addition, existing most of air core coil adopts the method for coiling lead on non magnetic skeleton, and the coil sampling precision depends on loop density and constant skeleton sectional area, and manufacture craft requires high, and the dispersiveness during batch process is big, is not easy to industrialized development.
Summary of the invention
The purpose of this utility model is in order to have overcome existing current transformer magnetic saturation, magnetic resonance and the low defective of certainty of measurement, provide a kind of simple in structure, easy to process, the frequency band range that broad is arranged, no magnetic saturation, the certainty of measurement height, the no second open circuit open type electronic current mutual inductor that Keep Clear-High Voltage.
In order to achieve the above object; the technical solution adopted in the utility model is: a kind of open type electronic current mutual inductor; connecting the secondary converting unit by secondary winding forms; its technical characterstic is that described secondary winding is formed by two " C " type printed panel butt joints; even vertical fixing at interval has little paster more than three on every " C " type printed panel; be respectively equipped with the loop that is in series successively by little paster more than three on two " C " type printed panels; two loops on two " C " type printed panel connect through Shielded Twisted Pair, and the leading-out terminal of secondary winding connects the secondary converting unit through Shielded Twisted Pair and realizes output measurement and guard signal.
Further, the leading-out terminal of described air core coil is arranged between two little pasters on arbitrary " C " type printed panel.
Again further, described little paster is the rectangle hollow coil, and the end of incoming cables of a rectangle hollow coil of adjacent two rectangle hollow coils is connected in series with the leading-out terminal of another rectangle hollow coil.
The beneficial effect that the utility model reaches is: the effect of little paster is to obtain tested current field to change the induced potential that is produced, the effect of printed panel is to provide the loop to be together in series to little paster, adopt two " C " type printed panel coil wire laying modes flexible, the loop of arranging on " C " type printed panel can provide secondary winding air core coil link circuit, simple in structure, easy to process, cost of manufacture is low, can select to have " C " type printed panel of the little paster of different numbers according to tested size of current, applied widely; Adopt the little paster of rectangle hollow coil to be combined into the special construction of air core coil, do not have magnetic material, when two " C " types of instrument transformer printed panel separates, certainty of measurement without any influence, is reached high accuracy, good stability easily, the frequency band range that broad is arranged the magnetic saturation phenomenon can not occur.
The utility model little paster of a plurality of rectangle hollow coils of on two " C " type printed panels, connecting; but connect into the secondary winding hollow coil current transformer of an end flexible connection, other end opening again through Shielded Twisted Pair; whole easy to process, precision is high, the frequency band range of broad is arranged; no magnetic saturation; Keep Clear-High Voltage for no second open circuit; the hollow coil current transformer opening and closing can be used; safe and convenient; be applicable to the current measurement and the relaying protection of 35kV and following electric pressure electric power system, applied widely.
Description of drawings
Fig. 1 is the utility model structural representation.
Among the figure: C type printed panel 1, little paster 2, Shielded Twisted Pair 3,31, secondary converting unit 4.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Shown in Figure 1, open type electronic current mutual inductor of the present invention, form by 1 butt joint of two C type printed panels, be furnished with the loop that little paster series connection is provided on the printed panel, the loop of two C type printed panels forms complete loop by Shielded Twisted Pair 3, and then vertical fixing the little paster 2 of some above the printed panel, and little paster is according to counterclockwise evenly being weldingly fixed on printed panel successively; Little paster is by the loop on the printed panel (representing as solid line on the accompanying drawing 1) series connection mutually successively, be provided with in addition on two C type printed panels two halves C type printed panel is connected into together loop (representing as dotted line on the accompanying drawing 1), the two halves loop links into an integrated entity by Shielded Twisted Pair, the quantity of two little pasters is selected according to tested size of current, is useful on the main printed panel to a plurality of little pasters accurate location and reliable mechanical fastening system are provided; The air core coil that completes is installed in the shell; use epoxy resin to seal admittedly; cut open from the centre after the full solidification; re-use the metal waistband two halves instrument transformer is combined into a complete electronic mutual inductor; the secondary winding air core coil of electronic mutual inductor is end flexible connection, other end hatch frame; directly snapping in cable by opening part during use can measure, and the leading-out terminal of secondary winding air core coil is measured and guard signal by two passage outputs of secondary converting unit 4 through Shielded Twisted Pair 31.
Claims (3)
1. open type electronic current mutual inductor; connecting the secondary converting unit by secondary winding forms; it is characterized in that: described secondary winding is formed by two " C " type printed panel butt joints; even vertical fixing at interval has little paster more than three on every " C " type printed panel; be respectively equipped with the loop that is in series successively by little paster more than three on two " C " type printed panel; two loops on two " C " type printed panel connect through Shielded Twisted Pair, and the leading-out terminal of secondary winding connects the secondary converting unit through Shielded Twisted Pair and realizes output measurement and guard signal.
2. open type electronic current mutual inductor according to claim 1 is characterized in that: the leading-out terminal of described secondary winding is arranged between two little pasters on arbitrary " C " type printed panel.
3. open type electronic current mutual inductor according to claim 1 is characterized in that: described little paster is the rectangle hollow coil, and the end of incoming cables of a rectangle hollow coil of adjacent two rectangle hollow coils is connected in series with the leading-out terminal of another rectangle hollow coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200581285U CN202034228U (en) | 2011-03-08 | 2011-03-08 | Open-type electronic-type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200581285U CN202034228U (en) | 2011-03-08 | 2011-03-08 | Open-type electronic-type current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202034228U true CN202034228U (en) | 2011-11-09 |
Family
ID=44896517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200581285U Expired - Lifetime CN202034228U (en) | 2011-03-08 | 2011-03-08 | Open-type electronic-type current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202034228U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368434A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | Open-type electronic current transformer |
| CN103137312A (en) * | 2011-11-22 | 2013-06-05 | Abb技术有限公司 | Current transformer |
| CN108226603A (en) * | 2016-12-13 | 2018-06-29 | 保时捷股份公司 | For measuring the device and method of the electric current in electric conductor |
-
2011
- 2011-03-08 CN CN2011200581285U patent/CN202034228U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102368434A (en) * | 2011-03-08 | 2012-03-07 | 江苏科兴电器有限公司 | Open-type electronic current transformer |
| CN103137312A (en) * | 2011-11-22 | 2013-06-05 | Abb技术有限公司 | Current transformer |
| CN108226603A (en) * | 2016-12-13 | 2018-06-29 | 保时捷股份公司 | For measuring the device and method of the electric current in electric conductor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111109 |
|
| CX01 | Expiry of patent term |