CN2515780Y - Current transformer - Google Patents
Current transformer Download PDFInfo
- Publication number
- CN2515780Y CN2515780Y CN 01272593 CN01272593U CN2515780Y CN 2515780 Y CN2515780 Y CN 2515780Y CN 01272593 CN01272593 CN 01272593 CN 01272593 U CN01272593 U CN 01272593U CN 2515780 Y CN2515780 Y CN 2515780Y
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- CN
- China
- Prior art keywords
- current
- coil
- plug
- connection terminal
- measuring
- 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
Disclosed is a current transducer applicable in an intelligent breaker with big current size, which is sleeved into a copper bus bar of the intelligent breaker to offer work power supply and current detection signal for the breaker. The device is composed of a shell, a measuring coil, an insulated cushion, an annular core, a mutual inductance coil and a current limit part. The current limit part is a current limit coil that is connected with a connection terminal of a mutual conductance coil on one connection terminal and with a plug on the other connection terminal. The other connection terminal of the mutual conductance coil is connected with the plug through a conductive wire. The utility model not only solves the problem of power supply stability and heating of the current mutual conductance coil under big current, but also reduces the effect of an energy coil on the measuring coil, enabling good linear degree of the output signal of the measuring coil and ensuring the consistency among three measuring coils of three phases especially in case of big current.
Description
The utility model relates to a kind of current transformer, is used in the intelligent circuit breaker (hereinafter to be referred as " intelligent switch ") of big current specification, and it is inserted on the copper bus-bar of " intelligent switch ", for " intelligent switch " provides working power and current detection signal.
Common current transformer is a kind of electromagnetic device that is used to measure electric current, is to utilize input winding on the iron core and output current ratio and the inversely proportional principle of turn ratio between winding to be made.This current transformer is not suitable for being applied on " intelligent switch ".China's utility model patent 99203287.3, a kind of " quick-magnetic saturated current transformer " that can be applied on " intelligent switch " disclosed, it is the magnetic shunt piece that changes with the permeability magnetic material thin slice of the other insertion of output winding wire bag (being the energy coil) at annular core, the magnetic shunt piece can bypass a part of magnetic line of force by the energy coil when big electric current, thereby the short circuit current of energy coil is remained unchanged substantially, reach the purpose of current limliting, and then solved " intelligent switch " the power supply stability under big electric current and the difficult problem of heating.But, above-mentioned patent is because the existence of magnetic shunt piece, make current transformer have following defective: at first, the magnetic shunt piece makes magnetic circuit that variation take place, influenced the magnetic circuit of measuring in the coil and distributed, made the poor linearity of the output signal of measuring coil, especially when big electric current, three alternate three consistency of measuring coil are relatively poor, and interference is arranged mutually; Secondly, because the requirement of the gap between magnetic shunt piece and the annular core is comparatively strict, therefore installs and adjust inconvenience; Once more, when the electric current I 〉=1.2In that flows through in the copper bus-bar (rated current), the short circuit current that installs the magnetic shunt piece additional is also enough not little.
The purpose of this utility model be to provide a kind of rational in infrastructure, easy for installation, short circuit current is little, can efficiently solve energy coil power supply stability and heating problem under big electric current and make the good current transformer of linearity of output signal of measuring coil.
The purpose of this utility model is achieved like this, a kind of current transformer, it is by housing 8, be located at the measurement coil 11 in the housing 8, insulation cushion 12, annular core 1, the mutual inductor 3 that is placed on the annular core 1 by bobbin 2 reaches the current-limiting components composition of connecting with mutual inductor 3, described current-limiting components is a current-limiting inductor 14, current-limiting inductor 14 is wound on the hollow skeleton 13 and is positioned at housing 8, the outside of annular core 1, the one terminals are connected with terminals of mutual inductor 3, another terminals are connected with plug 5 by lead, another terminals of mutual inductor 3 are connected with plug 5 by lead, and two terminals measuring coil 11 are connected with plug 6 by lead respectively.
The utility model is to divide two parts coiling with the energy coil, and wherein a part is wound on the annular core 1, claims mutual inductor 3, and another part is wound on the hollow skeleton 13, claims current-limiting inductor 14, and then two parts coil is together in series.Behind this novel employing said structure, both solved power supply stability and the heating problem of electric current mutual inductor under big electric current, reduced the energy coil again to measuring the influence of coil, make that the linearity of output signal of measuring coil is good, particularly when big electric current, three alternate three consistency of measuring coils have been guaranteed.
Below in conjunction with accompanying drawing the utility model body is further narrated.
Accompanying drawing is a structure diagram of the present utility model.
The housing 8 general plastic mouldings that adopt of the present utility model form, and the bottom centre of housing 8 has a base 10, and the centre of base 10 is through holes, is copper bus-bar jack 9, is used for the copper bus-bar of plant " intelligent switch ".Place below in the bottom of housing 8 and to measure coil 11, two terminals measuring coil 11 are connected with plug 6 respectively, simultaneously, for the ease of connecting and installing, can set up one and print copper-clad plate 4, be laid with some printed conductors printing in the copper-clad plate 4, two terminals at first will measuring coil 11 are connected with two printed conductors in the printing copper-clad plate 4 respectively, two printed conductors are connected with plug 6 by lead again, and print copper-clad plate 4 by screw on the boss 7 of housing 8.The utility model is provided with an insulation cushion 12 above measurement coil 11, above insulation cushion 12, be placed with annular core 1 and with the current-limiting inductor 14 of hollow skeleton 13, wherein annular core 1 is nested with on base 10, current-limiting inductor 14 is positioned at the outside of annular core 1, penetrating a mutual inductor 3 that is wound in enamelled wire on the bobbin 2 on the annular core 1, terminals of mutual inductor 3 are connected in series with terminals of current-limiting inductor 14, another terminals of mutual inductor 3 are connected on the printed conductor printing copper-clad plate 4, this printed conductor is connected with plug 5 by lead again, another terminals of current-limiting inductor 14 then are connected on another root printed conductor of printing copper-clad plate 4, and this printed conductor is connected with plug 5 by lead again.Through the above-mentioned current transformer that assembles in the upper end of housing 8 again with resin or silicon rubber embedding, plug 5,6 is exposed to outside the housing 8.
The utility model only needs current transformer is inserted on the copper bus-bar of " intelligent switch " by the copper bus-bar jack 9 on its base 10 when mounted, and plug 5,6 is connected with the control circuit of " intelligent switch " respectively gets final product, and installs very convenient.
Claims (1)
1, a kind of current transformer, it is by housing (8), be located at the measurement coil (11) in the housing (8), insulation cushion (12), annular core (1), the mutual inductor (3) that is placed on the annular core (1) by bobbin (2) reaches the current-limiting components composition of connecting with mutual inductor (3), it is characterized in that described current-limiting components is current-limiting inductor (14), current-limiting inductor (14) is wound on the hollow skeleton (13), and be positioned at housing (8), the outside of annular core (1), the one terminals are connected with terminals of mutual inductor (3), another terminals are connected with plug (5) by lead, another terminals of mutual inductor (3) are connected with plug (5) by lead, and two terminals measuring coil (11) are connected with plug (6) by lead respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01272593 CN2515780Y (en) | 2001-11-28 | 2001-11-28 | Current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01272593 CN2515780Y (en) | 2001-11-28 | 2001-11-28 | Current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2515780Y true CN2515780Y (en) | 2002-10-09 |
Family
ID=33677720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01272593 Expired - Lifetime CN2515780Y (en) | 2001-11-28 | 2001-11-28 | Current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2515780Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206951B (en) * | 2007-11-16 | 2010-08-25 | 介国安 | Energy-saving current transformer |
| CN102360871A (en) * | 2011-08-23 | 2012-02-22 | 常熟开关制造有限公司(原常熟开关厂） | Mutual inductor packaging assembly |
| CN102005291B (en) * | 2009-08-31 | 2012-10-03 | 西门子公司 | Mutual inductor in current transformer |
| CN103149412A (en) * | 2013-02-05 | 2013-06-12 | 王鹏 | Electric current transducer capable of being installed on line and manufacturing method |
| CN112350125A (en) * | 2020-10-23 | 2021-02-09 | 深圳市信锐网科技术有限公司 | Current transformer |
-
2001
- 2001-11-28 CN CN 01272593 patent/CN2515780Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101206951B (en) * | 2007-11-16 | 2010-08-25 | 介国安 | Energy-saving current transformer |
| CN102005291B (en) * | 2009-08-31 | 2012-10-03 | 西门子公司 | Mutual inductor in current transformer |
| CN102360871A (en) * | 2011-08-23 | 2012-02-22 | 常熟开关制造有限公司(原常熟开关厂） | Mutual inductor packaging assembly |
| CN102360871B (en) * | 2011-08-23 | 2012-11-21 | 常熟开关制造有限公司(原常熟开关厂） | Mutual inductor packaging assembly |
| CN103149412A (en) * | 2013-02-05 | 2013-06-12 | 王鹏 | Electric current transducer capable of being installed on line and manufacturing method |
| CN103149412B (en) * | 2013-02-05 | 2015-02-04 | 王鹏 | Electric current transducer capable of being installed on line and manufacturing method |
| CN112350125A (en) * | 2020-10-23 | 2021-02-09 | 深圳市信锐网科技术有限公司 | Current transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHANGSHU SWITCH MANUFACTURING CO., LTD. ( CHANGSHU Free format text: FORMER NAME OR ADDRESS: CHANGSHU SWITCH FACTORY |
|
| CP03 | Change of name, title or address |
Address after: 215500 No. 8 Jianye Road, Jiangsu, Changshou City Patentee after: Changshu Switchgear Manufacturing Co., Ltd. (Former Changshu Switchgear Factory) Address before: 215532 Li Road, Jiangsu, Changshou City Patentee before: Changshu Switch Factory |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20111128 Granted publication date: 20021009 |