CN204228797U - A kind of current transformer - Google Patents
A kind of current transformer Download PDFInfo
- Publication number
- CN204228797U CN204228797U CN201420591963.9U CN201420591963U CN204228797U CN 204228797 U CN204228797 U CN 204228797U CN 201420591963 U CN201420591963 U CN 201420591963U CN 204228797 U CN204228797 U CN 204228797U
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- China
- Prior art keywords
- current transformer
- sensing module
- skeleton
- merge cells
- optical fiber
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Abstract
The utility model discloses a kind of current transformer.Comprise sensing module 1 and merge cells 2, the employing of described current transformer be non magnetic skeleton 3, what described non magnetic skeleton 3 was wound around is helix 4, and described helix 4 be uniform winding, formation Luo-coil; Described non-magnetic modules skeleton 3 lower end is by remote end module 5 connecting fiber 6, and described optical fiber 6 outer end is enclosed with jagged composite insulator 7; The lower end of described optical fiber 6 is connected with and exchanges box 8, and is directly connected with optical cable 9 through exchanging box 8, and what the right-hand member of described optical cable 9 connected is described sensing module 1; Described sensing module 1 is connected with network secondary device by merge cells 2.The utility model has following beneficial effect: measuring accuracy high and safety, economical environment-protective, burns or risk of explosion without equipment simultaneously.
Description
[technical field]
The utility model relates to a kind of mutual inductor, particularly a kind of current transformer of electronic type.
[background technology]
Primary current, the primary voltage of electric system are measured by current transformer and voltage transformer (VT), therefore, whether safe and reliable operation depends on that whether current transformer and voltage transformer (VT) are enough accurately with reliable in electric system, visible, current transformer and voltage transformer (VT) are the visual plants in electric system.Conventional current mutual inductor is rather similar to transformer with the structure of voltage transformer (VT), all based on electromagnetic induction principle.But, along with the growth of electricity needs, the electric pressure of transformer station improves gradually, and the shortcoming of old-fashioned electromagnetic type mutual inductor also presents gradually, and therefore, current transformer starts out manufactured.The insulating requirements of current transformer is simple, and structure is also uncomplicated, and its cost raises along with electric pressure and obviously strengthens unlike routine transformer, so the electric pressure of electric system is higher, the advantage of applying electronic mutual inductor is larger.Current transformer can be divided into power type and non-transformer formula two kinds.Power free current transformer, based on optical sensing principle, relies on magneto-optic effect (current transformer) and electrooptical effect (voltage transformer (VT)) to design respectively, and is made up of pure optical device.Power free current transformer is no longer containing electronic circuit, but the requirement of power free current transformer to optical sensing material is higher, precision is easily subject to the impact of environment temperature, external stress, and the technological difficulties such as the encapsulation of sensing head not yet solve at present.Unlike, although have the current transformer of power supply after the development of significant period of time, technology is still not mature enough.Therefore, at present the mutual inductor research of electronic type is increased gradually.
[utility model content]
Fundamental purpose of the present utility model is, provides one not only to meet accuracy requirement, the current sensor of safety, environmental protection simultaneously.
For achieving the above object, the technical scheme that the utility model is taked is:
A kind of current transformer, comprises sensing module 1 and merge cells 2, the employing of described current transformer be non magnetic skeleton 3, what described non magnetic skeleton 3 was wound around is helix 4, and described helix 4 be uniform winding, formation Luo-coil; Described non-magnetic modules skeleton 3 lower end is by remote end module 5 connecting fiber 6, and described optical fiber 6 outer end is enclosed with jagged composite insulator 7; The lower end of described optical fiber 6 is connected with and exchanges box 8, and be directly connected with optical cable 9 through exchanging box 8, what the right-hand member of described optical cable 9 connected is described sensing module 1, and described sensing module 1 is responsible for gathering voltage, electric current, and converts described voltage, electric current to digital signal; Described sensing module 1 is connected with network secondary device by merge cells 2, and described merge cells 2 is two sub-cells, carries out measurement and monitoring; At least comprise a ferromagnetic iron core in described exchange box 8, and connect loading resistor, connected by offset current line in described exchange box.
In the utility model, described non magnetic skeleton is the coil of hollow.
In the utility model, described optical fiber 9 inside is provided with capacitance partial pressure equipment 10, and grease or medium glue 11 are filled up in space.
In the utility model, in described sensing module 1, current trend be from PIN12 to driving circuit 13 again to data processing 14, finally arrive laser instrument, and described data processing directly connects merge cells.
Compared with prior art, the utility model has following beneficial effect:
(1) measuring accuracy is high: can meet measuring accuracy and protection application requirement simultaneously, be conducive to protective device, measure and control device, the integration of the Elementary Functions such as measuring apparatus.
(2) safety, economical environment-protective: current transformer takes up space little, convenient transport, floor area is few, is easy to install, and reduces the generation of the open circuit phenomenon of secondary circuit, can not endanger the person and device security because producing too high voltages.
(3) without equipment burning or risk of explosion: current transformer simplicity of design, does not need extend oil, without equipment burning or risk of explosion, fire can not be caused.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model;
Wherein, 1-sensing module 2-merge cells, the non magnetic skeleton of 3-, 4-helix, 5-remote end module, 6-connecting fiber, 7-composite insulator, 8-exchange box, 9-optical cable, 10-capacitance partial pressure equipment, 11-grease or medium glue, 12-PIN, 13-driving circuit, 14-data processing.
[embodiment]
The technological means realized for making the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the utility model further.
As shown in Figure 1, sensing module 1 and merge cells 2, the employing of described current transformer be non magnetic skeleton 3, what described non magnetic skeleton 3 was wound around is helix 4, and described helix 4 be uniform winding, formation Luo-coil; Described non-magnetic modules skeleton 3 lower end is by remote end module 5 connecting fiber 6, and described optical fiber 6 outer end is enclosed with jagged composite insulator 7; The lower end of described optical fiber 6 is connected with and exchanges box 8, and be directly connected with optical cable 9 through exchanging box 8, what the right-hand member of described optical cable 9 connected is described sensing module 1, and described sensing module 1 is responsible for gathering voltage, electric current, and converts described voltage, electric current to digital signal; Described sensing module 1 is connected with network secondary device by merge cells 2, and described merge cells 2 is two sub-cells, carries out measurement and monitoring; At least comprise a ferromagnetic iron core in described exchange box 8, and connect loading resistor, connected by offset current line in described exchange box.Wherein, described non magnetic skeleton is the coil of hollow.Described optical fiber 9 inside is provided with capacitance partial pressure equipment 10, and grease or medium glue 11 are filled up in space.In described sensing module 1, current trend be from PIN12 to driving circuit 13 again to data processing 14, finally arrive laser instrument, and described data processing directly connects merge cells.
Be wound into uniformly by helical on non magnetic skeleton, form Luo-coil, its output signal is the differential of tested electric current, and the linearity of output quantity is fine.Sensing module and merge cells constitute the current transformer of power supply.Sensing module is arranged on high-pressure side, is responsible for gathering primary side voltage, electric current convert thereof into digital signal; Merge cells is secondary device, and it is between current transformer and networking secondary device, can merge the signal that each phase remote end module transmits, and is transmitted to the use of other device.
Ultimate principle of the present utility model is, current transformer eliminates the iron core of old-fashioned mutual inductor inside, can not produce the saturation problem of mutual inductor, also can not cause ferroresonance.Conclude, after putting into operation, current transformer transient response function admirable, improves power supply reliability.In addition, Optical Fiber Transmission need not build a large amount of cable ducts, makes transformer station compacter, reduces expropriation of land cost, and has saved secondary device investment, and these all significantly reduce the construction cost of transformer station
Meanwhile, the insulation system that the utility model adopts is very simple, due to by optical fiber transmitting electric power, substantially increases the height of sensing module and merge cells simultaneously, it is adapted in the application of high pressure level more.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (3)
1. a current transformer, comprise sensing module (1) and merge cells (2), it is characterized in that, the employing of described current transformer be non magnetic skeleton (3), what described non magnetic skeleton (3) was above wound around is helix (4), and described helix (4) is uniform winding, form Luo-coil; Described non-magnetic modules skeleton (3) lower end is by remote end module (5) connecting fiber (6), and described optical fiber (6) outer end is enclosed with jagged composite insulator (7); The lower end of described optical fiber (6) is connected with and exchanges box (8), and be directly connected with optical cable (9) through exchanging box (8), what the right-hand member of described optical cable (9) connected is described sensing module (1), described sensing module (1) is responsible for gathering voltage, electric current, and converts described voltage, electric current to digital signal; Described sensing module (1) is connected with network secondary device by merge cells (2), and described merge cells (2) is two sub-cells, carries out measurement and monitoring; At least comprise a ferromagnetic iron core in described exchange box (8), and connect loading resistor, connected by offset current line in described exchange box.
2. a kind of current transformer according to claim 1, is characterized in that, described non magnetic skeleton is the coil of hollow.
3. a kind of current transformer according to claim 1, is characterized in that: described optical fiber (9) inside is provided with capacitance partial pressure equipment (10), and grease or medium glue (11) are filled up in space.
A kind of current transformer according to claim 1, it is characterized in that, in described sensing module (1), current trend is again to data processing (14) from PIN (12) to driving circuit (13), finally arrive laser instrument, and described data processing directly connects merge cells.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591963.9U CN204228797U (en) | 2014-10-13 | 2014-10-13 | A kind of current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420591963.9U CN204228797U (en) | 2014-10-13 | 2014-10-13 | A kind of current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204228797U true CN204228797U (en) | 2015-03-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420591963.9U Expired - Fee Related CN204228797U (en) | 2014-10-13 | 2014-10-13 | A kind of current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204228797U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597346A (en) * | 2016-12-08 | 2017-04-26 | 中国电力科学研究院 | Electronic current transformer laser energy supply self-diagnosis method and system thereof |
| RU210597U1 (en) * | 2021-12-13 | 2022-04-21 | Общество с ограниченной ответственностью Научно-производственное объединение "Цифровые измерительные трансформаторы" (ООО НПО "ЦИТ") | DIGITAL CURRENT AND VOLTAGE TRANSFORMER |
-
2014
- 2014-10-13 CN CN201420591963.9U patent/CN204228797U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597346A (en) * | 2016-12-08 | 2017-04-26 | 中国电力科学研究院 | Electronic current transformer laser energy supply self-diagnosis method and system thereof |
| RU210597U1 (en) * | 2021-12-13 | 2022-04-21 | Общество с ограниченной ответственностью Научно-производственное объединение "Цифровые измерительные трансформаторы" (ООО НПО "ЦИТ") | DIGITAL CURRENT AND VOLTAGE TRANSFORMER |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160912 Address after: 300000, Tianjin Nankai District Yangtze River Road and Nankai three road junction to blend the square, 2/3-3-1-2201 Patentee after: Tianjin Enterprise Technology Co., Ltd. Address before: 300000, Heping District, Tianjin, South Road, No. 25, 11, 26 Patentee before: Tianjin Qishang Technology Development Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150325 Termination date: 20201013 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |