CN2492934Y - Shield structure for zero-sequence current transformer - Google Patents
Shield structure for zero-sequence current transformer Download PDFInfo
- Publication number
- CN2492934Y CN2492934Y CN 01252872 CN01252872U CN2492934Y CN 2492934 Y CN2492934 Y CN 2492934Y CN 01252872 CN01252872 CN 01252872 CN 01252872 U CN01252872 U CN 01252872U CN 2492934 Y CN2492934 Y CN 2492934Y
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- CN
- China
- Prior art keywords
- sequence current
- iron
- zero
- breaker
- shielding
- 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 - Lifetime
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Abstract
The utility model relates to a shielding structure of a zero-sequence current transformer used by a residual current breaker. Since the previous shielding structure applies one or two layers of iron shielding housings and a conductive bar penetrating a main loop is required to maintain a certain distance with an iron core, the size of the breaker has to be enlarged, otherwise the breaker is unbalanced and operates wrongly. In the technical scheme of the utility model, several or no more than twenty silicon steel sheets are respectively positioned at the upper and lower positions of the outer shielding layer of an existing product coupled with a shell; after the shielding structure of the zero-sequence current transformer is reproduced, the results of experiments show that the residual current breaker completely comes up to the standard, and the volume of the transformer is smaller than the conventional structure.
Description
(1) technical field.The utility model relates to the shielding construction of the zero sequence current mutual inductor that a kind of residual current circuit breaker uses, and belongs to low-voltage electrical apparatus breaking technique field.
(2) background technology.Residual current circuit breaker is used for the electrical equipment of low-voltage circuit, and as a kind of protection electrical equipment, this kind circuit breaker is made up of main switch, release, electronic circuit and zero sequence current mutual inductor, and what wherein problem was more is the shielding construction of zero sequence current mutual inductor.If its shielding construction is unreasonable, will have influence on the balance of residual current transformer, be that its shielding construction design is unreasonable, when starting current appears in distribution line, can cause the misoperation of circuit breaker, in the time should not disconnecting, disconnected, distribution line can not normally be moved, and made this circuit breaker quality accident occur.
At home, the residual current circuit breaker of the big current specification of all big enterprises' exploitation and production (rated current is more than 200A reaches), its shielding construction generally all adopts 1～2 layer of iron radome, and require to pass the busbar of major loop, keep an indefinite distance, could satisfy performance requirement with the iron core of zero sequence current mutual inductor, therefore, when design in order to reach shielding requirements, have to be with the residual current circuit breaker up-sizing, otherwise will produce unbalance and misoperation occurs.This is one of problem of residual current circuit breaker existence now.
(3) summary of the invention.The purpose of this utility model provides a kind of shielding construction of follow-on zero sequence current mutual inductor, and this structual shield performance is good, and compactness will avoid main switch to produce misoperation, and effect is fairly obvious.
Task of the present utility model is finished like this: the upper and lower again placement of skin of the iron shield cover of existing product several pieces to picking up several shield blade of making by iron plate or silicon steel sheet, insulating with the external world gets final product.Adopt this solution, the residual current circuit breaker of trial production complies with the national standard requirements fully, solves this difficult problem.
(4) description of drawings.
Fig. 1 is the shielding construction profile of the utility model zero sequence current mutual inductor.
Fig. 2 is the shielding construction external form figure of the utility model zero sequence current mutual inductor.
Among Fig. 1, Fig. 2,1 be shielding construction vinyl cover, 2 for secondary coil, 3 for unshakable in one's determination, 4 be plastic casing for shield blade, 6 for iron shield cover, 5.
(5) embodiment
With reference to Fig. 1, Fig. 2, respectively add iron shield cover 4 outer field upper and lower and to place several pieces or to pick up several iron plate or shield blade that silicon steel sheet is made, the THICKNESS CONTROL of iron plate or silicon steel sheet is at 0.35～0.5 millimeter, add plastic casing 6 and vinyl cover 1 at skin then, with instrument transformer device unshakable in one's determination 3 and iron shield cover 4, shield blade 5 gets final product with external insulation.
Such scheme is a most preferred embodiment of the present utility model.
Claims (2)
1, a kind of shielding construction of zero sequence current mutual inductor, form by instrument transformer secondary coil (2), instrument transformer iron core (3), radome (4) and shell (6), it is characterized in that it iron shield cover 4 outer upper and lower each put the shield blade (5) of big or small identical several pieces of making by silicon steel sheet, plastic casing (6) and vinyl cover (1) on skin installs additional then are with instrument transformer iron core (3) and iron shield cover (4), silicon steel sheet shield blade (5) and external insulation.
2, zero sequence current mutual inductance shielding construction according to claim 1 is characterized in that shield blade made by iron plate, and the sheet numerical control is built in picking up several, and THICKNESS CONTROL is at 0.35～0.5 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252872 CN2492934Y (en) | 2001-08-03 | 2001-08-03 | Shield structure for zero-sequence current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01252872 CN2492934Y (en) | 2001-08-03 | 2001-08-03 | Shield structure for zero-sequence current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2492934Y true CN2492934Y (en) | 2002-05-22 |
Family
ID=33662471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01252872 Expired - Lifetime CN2492934Y (en) | 2001-08-03 | 2001-08-03 | Shield structure for zero-sequence current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2492934Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640100B (en) * | 2008-07-30 | 2011-12-07 | 台达电子工业股份有限公司 | Magnetic element |
| CN103632825A (en) * | 2012-08-23 | 2014-03-12 | 西门子公司 | Protection shell used for current transformer and current transformer assembly |
| CN105575629A (en) * | 2016-02-29 | 2016-05-11 | 济南铂晶电子科技有限公司 | Method for improving balance of open type aftercurrent transformer and device for achieving method |
| CN106486275A (en) * | 2016-10-27 | 2017-03-08 | 成都启立辰智科技有限公司 | Antistatic magnetic is around transformator |
-
2001
- 2001-08-03 CN CN 01252872 patent/CN2492934Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640100B (en) * | 2008-07-30 | 2011-12-07 | 台达电子工业股份有限公司 | Magnetic element |
| CN103632825A (en) * | 2012-08-23 | 2014-03-12 | 西门子公司 | Protection shell used for current transformer and current transformer assembly |
| CN103632825B (en) * | 2012-08-23 | 2016-12-21 | 西门子公司 | Protective case and Current Transformer Assembly for current transformer |
| CN105575629A (en) * | 2016-02-29 | 2016-05-11 | 济南铂晶电子科技有限公司 | Method for improving balance of open type aftercurrent transformer and device for achieving method |
| CN106486275A (en) * | 2016-10-27 | 2017-03-08 | 成都启立辰智科技有限公司 | Antistatic magnetic is around transformator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRICAL APPARATUS RESEARCH INSTITUTE ( Free format text: FORMER OWNER: SHANGHAI ELECTRIC APPLIANCE SCI. INST. Effective date: 20100825 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20100825 Address after: 200063 No. 505, Wuning Road, Shanghai Patentee after: Shanghai Electrical Apparatus Research Institute Co., Ltd. Address before: 200063 No. 505, Wuning Road, Shanghai Patentee before: Shanghai Electric Appliance Sci. Inst. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110803 Granted publication date: 20020522 |