CN201191562Y - Multifunction current mutual inductor - Google Patents
Multifunction current mutual inductor Download PDFInfo
- Publication number
- CN201191562Y CN201191562Y CNU2008200767795U CN200820076779U CN201191562Y CN 201191562 Y CN201191562 Y CN 201191562Y CN U2008200767795 U CNU2008200767795 U CN U2008200767795U CN 200820076779 U CN200820076779 U CN 200820076779U CN 201191562 Y CN201191562 Y CN 201191562Y
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- coil
- current transformer
- metering
- lead
- magnetic test
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Abstract
The utility model relates to a multifunctional transformer, one, two or three current transformer units are arranged in an insulating casing of a current transformer, each current transformer unit is provided with two or three iron cores which are respectively wound with a measuring coil and a detecting coil, the measuring coil and the detecting coil use an identical primary lead wire as the primary, the measuring coil and the detecting coil are mutually separately arranged, a secondary lead wire of the measuring coil is connected with a measuring circuit of an electric power meter, and a secondary lead wire of the detecting coil is connected with a detecting circuit of the electric power meter. The multifunctional transformer not only has extremely high measurement accuracy of a common current transformer, but also can monitor the open circuit and the short circuit of a current input end, resolves the problem of the monitoring of CT secondary open circuit and short circuit state of a detecting front end through utilizing varieties of methods of high-frequency signal injection and the like, and is relatively low in power consumption.
Description
Technical field
The utility model relates to a kind of current transformer that has in the metering and ammeter parts, especially the electricity consumption field management terminal ammeter of measuring ability.
Background technology
Existing current transformer is generally electromagnetic transformer, in electronic electric energy meter, be used as current measurement, for electric energy computation chip provides the metering current signal, and electricity consumption field management terminal ammeter has the function of measuring except requiring current transformer, also need to provide detection current input terminal open circuit, the function of short-circuit condition, to detect CT level open circuit of front end, short-circuit condition, identification is reported to the police unusually, realize anti-electricity-theft function, and existing current transformer does not possess measuring ability owing to have only function of measuring, can not satisfy electricity consumption field management terminal ammeter needs.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of multi-functional current transformer with function of measuring and measuring ability.
The utility model adopts following technical scheme:
The utility model is built-in 1,2 or 3 current transformer unit in the insulation shell of current transformer, and each current transformer unit is made up of 2 or 3 secondary coils, and secondary coil is made up of metering coil and magnetic test coil; Secondary coil has 2 or 3 iron cores that are wound with metering coil and magnetic test coil respectively, and an elementary shared elementary lead-in wire of metering coil and magnetic test coil constitutes primary coil by elementary lead-in wire winding; Metering coil and magnetic test coil are mutual isolation setting, and the secondary lead of metering coil connects the metering circuit of ammeter, and the secondary lead of magnetic test coil connects the testing circuit of ammeter.
Each current transformer unit of the utility model is made of 1 metering coil and 1 or 2 magnetic test coil, about magnetic test coil and metering coil can be, about, front and back are provided with.
Secondary metering output of the utility model and detection output can also can be the stitch lead-out mode for the lead-in wire lead-out mode.
The utility model 1,2 or 3 current transformer unit are arranged side by side in insulation crust, set as one by the epoxy resin envelope.
The utility model disposes the copper embedding nut or the installation foot that can be installed together with electricity consumption field management terminal ammeter on electricity consumption field management terminal Current Transformer.
The utility model good effect is as follows: the utility model not only has the very high accuracy of measuring of general current transformer, can also monitor open circuit, the short-circuit condition of current input terminal, by several different methods such as employing high-frequency signal injections, solve and detect CT level open circuit of front end, short-circuit condition monitoring problem, and power consumption is lower.The utility model makes current transformer when having function of measuring by increase the method for one group of magnetic test coil again on the basis of original metering coil, has measuring ability again.
Description of drawings
Accompanying drawing 1 is the utility model structural representation
Accompanying drawing 2 is that outside drawing is looked on a left side of the present utility model
In the accompanying drawings: 1 elementary lead-in wire, 2 current transformers, 3 lead-in wires, 4 lead-in wires, 5 magnetic test coils, 6 bronze medal embedding nuts, 7 metering coils, 8 shells.
Embodiment
The utility model each current transformer unit in insulation crust 8 is made up of 2 secondary coils, 1 coil inserts metering circuit as metering coil 7, other 1 coil inserts testing circuit as magnetic test coil 5, an elementary shared elementary lead-in wire of two coils, twine by elementary lead-in wire and to constitute primary coil, but elementary wear around number of turn difference; The secondary of two coils isolates each other; The utility model each current transformer unit in insulation crust 8 also can be made up of 3 secondary coils, 1 coil inserts metering circuit as metering coil 7, other 2 are inserted testing circuits as magnetic test coil 5, an elementary shared elementary lead-in wire 1 of three coils, twine by elementary lead-in wire and to constitute primary coil, but elementary wear around number of turn difference; The secondary of three coils isolates each other, and metering coil 7 adopts different iron cores respectively with magnetic test coil 5.In every current transformer of the utility model 21,2 or 3 current transformer unit can be set, can satisfy the different requirements of phase three-wire three and three-phase and four-line, and isolate mutually between the different current transformers unit, all there is independently elementary lead-in wire each unit, and is furnished with binding post; Secondary metering output and detection output can be the stitch lead-out mode, also can be the lead-in wire lead-out mode; When producing, adopt the embedding of epoxy resin one, do not have the friction of colliding with between each coil, realize good insulation performance between each coil, have copper embedding nut 6 or installation foot on the insulation crust 8, easy for installation, reliable.
Shown in accompanying drawing 1,2, in an embodiment, electricity consumption field management terminal Current Transformer 2 is conjuncted setting, has 3 current transformer unit and forms.Each current transformer unit has a metering coil 7 and magnetic test coil 5 to constitute, and the signal that metering coil 7 provides is by 4 metering circuits that export ammeter to that go between, and the signal that magnetic test coil 5 provides is by 3 testing circuits that export ammeter to that go between; An elementary shared elementary lead-in wire 1 of metering coil 7 and magnetic test coil 5 constitutes primary coil by elementary lead-in wire winding.3 current transformer unit are placed side by side in insulation crust 8, by the epoxy resin embedding is one, dispose copper embedding nut 6 on electric field management terminal Current Transformer 2, mate fully the position of reserving on installation site and the electricity consumption field management terminal ammeter, conveniently installs.
Claims (5)
1, a kind of multi-functional current transformer, it is characterized in that built-in 1,2 or 3 current transformer unit in the insulation shell (8) of current transformer (2), each current transformer unit is made up of 2 or 3 secondary coils, and secondary coil is made up of metering coil (7) and magnetic test coil (5); Secondary coil has 2 or 3 iron cores that are wound with metering coil (7) and magnetic test coil (5) respectively, and an elementary shared elementary lead-in wire (1) of metering coil (7) and magnetic test coil (5) constitutes primary coil by elementary lead-in wire winding; Metering coil (7) and magnetic test coil (5) are mutual isolation setting, and the secondary lead (4) of metering coil (7) connects the metering circuit of ammeter, and the secondary lead (3) of magnetic test coil (5) connects the testing circuit of ammeter.
2, a kind of multi-functional current transformer according to claim 1, it is characterized in that each current transformer unit is made of 1 metering coil (7) and 1 or 2 magnetic test coil (5), magnetic test coil (5) and measure coil (7) can be about, about, the front and back setting.
3, a kind of multi-functional current transformer according to claim 1 and 2 is characterized in that secondary metering output and detects output and can also can be the stitch lead-out mode for the lead-in wire lead-out mode.
4, a kind of multi-functional current transformer according to claim 1 and 2 is characterized in that 1,2 or 3 current transformer unit is arranged side by side in insulation crust (8), sets as one by the epoxy resin envelope.
5, a kind of multi-functional current transformer according to claim 1 and 2 is characterized in that disposing the copper embedding nut (6) or the installation foot that can be installed together with electricity consumption field management terminal ammeter on electricity consumption field management terminal Current Transformer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200767795U CN201191562Y (en) | 2008-05-14 | 2008-05-14 | Multifunction current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200767795U CN201191562Y (en) | 2008-05-14 | 2008-05-14 | Multifunction current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201191562Y true CN201191562Y (en) | 2009-02-04 |
Family
ID=40335725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200767795U Expired - Lifetime CN201191562Y (en) | 2008-05-14 | 2008-05-14 | Multifunction current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201191562Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941146A (en) * | 2014-03-27 | 2014-07-23 | 云南电网公司昆明供电局 | Device and method for detecting and distinguishing accuracy grades of secondary windings of 10 kV current transformers on situation of uninterrupted power supply |
| CN114823121A (en) * | 2022-05-30 | 2022-07-29 | 河北申科电力股份有限公司 | Method for producing electricity larceny prevention mutual inductor |
-
2008
- 2008-05-14 CN CNU2008200767795U patent/CN201191562Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941146A (en) * | 2014-03-27 | 2014-07-23 | 云南电网公司昆明供电局 | Device and method for detecting and distinguishing accuracy grades of secondary windings of 10 kV current transformers on situation of uninterrupted power supply |
| CN103941146B (en) * | 2014-03-27 | 2016-03-02 | 云南电网有限责任公司昆明供电局 | A kind of apparatus and method detecting and distinguish each Secondary Winding accuracy rating of 10kV current transformer that do not have a power failure |
| CN114823121A (en) * | 2022-05-30 | 2022-07-29 | 河北申科电力股份有限公司 | Method for producing electricity larceny prevention mutual inductor |
| CN114823121B (en) * | 2022-05-30 | 2023-08-01 | 河北申科电力股份有限公司 | Production method of anti-electricity-theft transformer |
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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: HEBEI SHENKE ELECTRONICS CO., LTD. Free format text: FORMER OWNER: XINJI CITY SHENKE AUTOMATION INSTRUMENT CO., LTD. Effective date: 20091016 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20091016 Address after: No. 9, East Industrial Zone, Shifu street, Xinji City, Hebei Province, China: 052360 Patentee after: Hebei Shenke Electronics Co., Ltd. Address before: No. 168, building street, Xinji, Hebei Province, China: 052360 Patentee before: Xinji Shenke Automation Meter Co., Ltd. |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Multifunctional current mutual inductor Effective date of registration: 20160531 Granted publication date: 20090204 Pledgee: Bank of China, Limited by Share Ltd, Xinji branch Pledgor: Hebei Shenke Electronics Co., Ltd. Registration number: 2016130000007 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090204 |
|
| CX01 | Expiry of patent term | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20200825 Granted publication date: 20090204 Pledgee: Bank of China, Limited by Share Ltd, Xinji branch Pledgor: HEBEI SHENKE ELECTRONICS Co.,Ltd. Registration number: 2016130000007 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |