CN2831363Y - Current transformer for electricity leakage protector - Google Patents
Current transformer for electricity leakage protector Download PDFInfo
- Publication number
- CN2831363Y CN2831363Y CN 200520024924 CN200520024924U CN2831363Y CN 2831363 Y CN2831363 Y CN 2831363Y CN 200520024924 CN200520024924 CN 200520024924 CN 200520024924 U CN200520024924 U CN 200520024924U CN 2831363 Y CN2831363 Y CN 2831363Y
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- iron core
- utility
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- current transformer
- type iron
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Abstract
The utility model relates to a current transformer for electric leakage protectors, which belongs to the technical field of an emergency circuit protecting device. The utility model comprises an iron core arranged on a conducting wire of a major loop and a detecting coil arranged on the iron core. The utility model is characterized in that the iron core is an annular closed type iron core through which the conducting wire of the major loop is penetrated, and the detecting coil is spirally wound and arranged on the annular closed type iron core which is formed into an O-shaped closed type iron core by overlapping and winding a cold-rolled silicon steel band. Because of the adoption of the annular closed type iron core, the utility model has the advantages of reducing the phenomenon of magnetic leakage, avoiding the problem of magnetic saturation for the existing over-current transformer under the operating condition of high current, solving the problem of the temperature drift of hot-rolled steel sheets, visibly improving the working stability and reliability of the electric leakage protector and enhancing the producing work efficiency of the electric leakage protector. The utility model can be widely used in the technical field of current detecting devices of various electric leakage protectors.
Description
Technical field
The utility model belongs to emergency protective circuit device field, relates in particular to a kind of current sensing means that is used for earth leakage protective device.
Background technology
Earth leakage protective device has high sensitivity and action rapidity aspect reaction electric shock and the earth leakage protective, this is other protection electrical equipment, and is incomparable as fuse, automatic switch etc.When system takes place that the person gets an electric shock or device housings when charged, bigger residual current appears, and earth leakage protective device then moves after detecting and handle this residual current reliably, cuts off the electricity supply.
During the electric equipment electric leakage, will present unusual curtage signal, earth leakage protective device impels actuator's action by detecting, handling this abnormal current or voltage signal.
Study on Electric Leakage Protective Instrument and application are all taken the status as the leading factor with the current mode earth leakage protective device both at home and abroad at present.
Current mode leakage protector be with the earth leakage current in the circuit as actuating signal, and how with electronic circuit as the intermediate controlled unit, highly sensitive, multiple functional, therefore this protective device obtains application more and more widely.
Because a variety of causes; the detecting element of the now commercially available earth leakage protective device with excess current protective function-overcurrent detects current transformer and (was called for short current transformer; down together); all adopt the hot rolled silicon steel sheet material; through striking out " E " font and/or " one " font steel disc; through stacked, amalgamation, constitute the iron core of instrument transformer.
Earth leakage protective device adopts the current transformer of crossing that said structure and method produce, and the one, because there is the slit in each steel disc when amalgamation, cause the whole magnetic resistance in stacked assembling back big, there is the leakage field phenomenon, " magnetic saturation " problem can appear when electric current greatly; The 2nd, along with the prolongation of operating time or because of the influence of factors such as transportation vibrations; slit between each steel disc easily changes; working point " temperature drift " phenomenon that showed as current transformer is serious; influence the job stability of whole earth leakage protective device, can cause whole device overcurrent set point on request not carry out the protectiveness action when serious.
The utility model content
Technical problem to be solved in the utility model provides a kind of current transformer that is used for earth leakage protective device.It has avoided having now current transformer " magnetic saturation " problem under big electric current operating mode, has reduced the leakage field phenomenon, has solved " temperature drift " problem of hot-rolled steel sheet, can significantly improve the job stability and the reliability of earth leakage protective device.
The technical solution of the utility model is: a kind of current transformer that is used for earth leakage protective device is provided, comprises iron core that is arranged on the major loop lead and the magnetic test coil that is arranged on the iron core, it is characterized in that: described iron core is the annular enclosed type iron core; Described major loop lead runs through and passes the annular enclosed type iron core; Described magnetic test coil ring type is twined and is arranged on the annular enclosed type iron core.
Above-mentioned annular enclosed type iron core constitutes a closed iron core of O shape by cold-rolled silicon steel tape through stacked coiling.
Between above-mentioned magnetic test coil and the iron core dielectric isolation layer is set.
Compared with the prior art, the utility model has the advantages that:
1. adopt annular (also claiming O shape) closed iron core, reduced the leakage field phenomenon, avoided having now current transformer " magnetic saturation " problem under big electric current operating mode;
2. the iron core that adopts cold-reduced silicon sheet to make has solved " temperature drift " problem of hot-rolled steel sheet, can significantly improve the job stability and the reliability of earth leakage protective device.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described further.
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model annular enclosed type iron core.
1 is the major loop lead among the figure, and 2 is the annular enclosed type iron core, and 3 is magnetic test coil, and 4 is dielectric isolation layer, and 5-1 and 5-2 are the magnetic test coil exit.
Embodiment
Among Fig. 1, the iron core 2 that is arranged on the major loop lead 1 is annular enclosed type iron core (its specific constructive form shows) in Fig. 2, the major loop lead runs through and passes the annular enclosed type iron core, magnetic test coil 3 ring types are twined and are arranged on the annular enclosed type iron core, dielectric isolation layer 4 is set between magnetic test coil and the iron core, and the exit 5-1 of magnetic test coil is connected with the relevant detection loop with 5-2.
Among Fig. 2, iron core 2 constitutes a closed iron core of O shape by cold-rolled silicon steel tape through stacked coiling.
Because the utility model has adopted annular (also claiming O shape) closed iron core; reduced the leakage field phenomenon; avoided having now current transformer " magnetic saturation " problem under big electric current operating mode; solved " temperature drift " problem of hot-rolled steel sheet; can significantly improve the job stability and the reliability of earth leakage protective device; simplify the action of manufacturing process and debugging operation, improved the production work efficiency of earth leakage protective device greatly.
The utility model can be widely used in the current sensing means field of various earth leakage protective devices.
Claims (3)
1. current transformer that is used for earth leakage protective device comprises the iron core that is arranged on the major loop lead and is arranged on magnetic test coil on the iron core, it is characterized in that:
Described iron core is the annular enclosed type iron core;
Described major loop lead runs through and passes the annular enclosed type iron core;
Described magnetic test coil ring type is twined and is arranged on the annular enclosed type iron core.
2. according to the described current transformer that is used for earth leakage protective device of claim 1, it is characterized in that described annular enclosed type iron core constitutes a closed iron core of O shape by cold-rolled silicon steel tape through stacked coiling.
3. according to the described current transformer that is used for earth leakage protective device of claim 1, it is characterized in that between described magnetic test coil and the iron core dielectric isolation layer being set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520024924 CN2831363Y (en) | 2005-09-22 | 2005-09-22 | Current transformer for electricity leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520024924 CN2831363Y (en) | 2005-09-22 | 2005-09-22 | Current transformer for electricity leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2831363Y true CN2831363Y (en) | 2006-10-25 |
Family
ID=37136290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520024924 Expired - Fee Related CN2831363Y (en) | 2005-09-22 | 2005-09-22 | Current transformer for electricity leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2831363Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308348A (en) * | 2011-07-20 | 2012-01-04 | 华为技术有限公司 | Current transformer and current detection circuit and detection method |
| CN109411221A (en) * | 2018-12-10 | 2019-03-01 | 浙江诚富电器科技有限公司 | A kind of band self-test current transformer structure |
-
2005
- 2005-09-22 CN CN 200520024924 patent/CN2831363Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308348A (en) * | 2011-07-20 | 2012-01-04 | 华为技术有限公司 | Current transformer and current detection circuit and detection method |
| WO2012083686A1 (en) * | 2011-07-20 | 2012-06-28 | 华为技术有限公司 | Current transformer, current detection circuit, and current detection method |
| CN109411221A (en) * | 2018-12-10 | 2019-03-01 | 浙江诚富电器科技有限公司 | A kind of band self-test current transformer structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 Termination date: 20100922 |