CN201498350U - Outdoor open current mutual inductor - Google Patents
Outdoor open current mutual inductor Download PDFInfo
- Publication number
- CN201498350U CN201498350U CN2009201106224U CN200920110622U CN201498350U CN 201498350 U CN201498350 U CN 201498350U CN 2009201106224 U CN2009201106224 U CN 2009201106224U CN 200920110622 U CN200920110622 U CN 200920110622U CN 201498350 U CN201498350 U CN 201498350U
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- current transformer
- outdoor open
- semi
- ring shape
- round ring
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- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The utility model discloses an outdoor open current mutual inductor which comprises two semicircular iron cores which are mutually insulated and a secondary coil, wherein the secondary coil is wound on one of the semicircular iron cores, an insulating layer is arranged on the semicircular iron core of the secondary coil, the two semicircular iron cores are butt-jointed into a current mutual inductor body. Through arranging the insulating layer on the iron core wound with the secondary winding, the outdoor open current mutual inductor can measure the current of high-voltage lines. The outdoor open current mutual inductor provided by the utility model can be clamped on a measured cable through the butt-joint of the two semicircular iron cores without cutting off the measured cable, and can be installed and detached on the cable through common tools, and has simple installation and convenient maintenance.
Description
Technical field
The utility model relates to a kind of electric equipment, relates in particular to a kind of current transformer.
Background technology
Current transformer is very important in an electric power system secondary device, and current transformer and transformer are very alike, and transformer is mainly used to the voltage of conversion line, and current transformer is mainly used to the electric current of conversion line.
In electric power system, according to the different situations of generating and electricity consumption, the size of current on the circuit differs, and differs greatly, and does not wait from several peaces to several Wan An.To directly measure these big and small electric currents, just need make ammeter and other electric meters of corresponding specification according to the size of line current.Will bring great difficulty to the instrument manufacturing like this.In addition, some high-tension line, high pressure such as 220kV or 10kV power transmission and transformation line for example will be directly with the electric current on the electric instrument measurement high-tension line, and that is extremely dangerous, also is definitely unallowed.
If insert current transformer on the line, just can be electric current big and small on the circuit, in different ratios, unification becomes the electric current of a certain specification.Need only the electric meter with a kind of specification like this, for example general electric current is the electric meter of 5A, just can pass through current transformer, the electric current of the specification that varies in size on the measurement circuitry.The basic structure and the transformer of current transformer are very alike simultaneously, and it also has two windings, and one is former limit winding or a winding; One is secondary winding or secondary winding.Between two windings insulation is arranged, make the isolation that electricity is arranged between two windings.Current transformer when operation a winding be connected on the circuit, secondary winding connects electric meter, therefore during the electric current on measuring high-tension line, although original edge voltage is very high, secondary voltage is but very low, thereby has guaranteed operating personnel's safety.
This shows that current transformer can also play the effect of insulation blocking except electric current not of uniform size on the circuit being become a certain size electric current of being convenient to measure, to guarantee operating personnel's safety.
The conventional current instrument transformer that is used at present has two kinds usually, and a kind of is the conventional type current transformer, needs in use a tested lead is blocked and could install, and installing/dismounting is very inconvenient.Another kind is the core-theaded type current transformer, though do not need in use tested cable is blocked and could install, must closely cooperate with the cable installation process when installing, and cable promptly is installed must be carried out simultaneously with the installation instrument transformer.Otherwise instrument transformer can't installation in position.Installing/dismounting is very inconvenient.
For the system reform, upgrading project, more than the installation of two kinds of instrument transformers all cable to be pulled down from switching device, just can install instrument transformer additional.Thereby difficulty of construction and construction volume have been increased greatly.In addition, the dismounting of the secondary of cable, installation also can produce certain potential safety hazard to switching device.
The utility model content
Technical problem to be solved in the utility model provides a kind of outdoor open-type current transformer, can measure the electric current of high-tension line, and has the characteristics simple, easy to maintenance of installing.
In order to solve the problems of the technologies described above, the utility model provides a kind of outdoor open-type current transformer, the semi-round ring shape iron core and the secondary coil that comprise two mutually insulateds, described secondary coil is wound on one of them semi-round ring shape iron core, the semi-round ring shape iron core of described coiling secondary coil is provided with insulating barrier, and described two semi-round ring shape iron cores are to being connected into a current transformer main body.
Furthermore, described current transformer also comprises the elongated open pipe, and described elongated open pipe is provided with the opening that a place is provided with along axis direction at least, and described elongated open pipe is arranged within the endoporus of described two semi-round ring shape iron cores butt joint formation.
Furthermore, comprise first projection and second projection on the described elongated open pipe, the distance between described first projection and second projection adapts with described current transformer axial width.
Furthermore, described current transformer also comprises two shells, is respectively applied for described two the semi-round ring shape iron cores of encapsulation.
Furthermore, described two semi-round ring shape iron cores are cast in described two shells with epoxy resin mixed glue respectively.
Furthermore, described two shells are in aggregates by the butt joint of stainless steel fastening bolt.
Furthermore, at least one described semi-round ring shape iron core comprises the corner angle through chamfered.
Furthermore, described current transformer also comprises the insulation blocking module, and the secondary outlet terminal is by described insulation blocking module sealing.
Furthermore, described insulation blocking module is provided with the insulating monitoring indicator light.
Furthermore, described current transformer also comprises protective cover, is arranged at outside the described current transformer main body.
Furthermore, described current transformer also comprises the insulation column that is used to support described current transformer main body, closely links into an integrated entity with described current transformer main body.
Furthermore, described current transformer also comprises analog bracket, is connected with described insulation column.
The utility model increases insulating barrier on the iron core that secondary winding is twined, thereby makes the utility model can realize measurement to the high-tension line electric current.Open Type Electric Current Mutual Inductor provided by the utility model need not tested cable is blocked, but directly the butt joint of two semi-round ring shape iron cores is stuck on the tested cable, only with common instrument can be on cable installing/dismounting, install simple, easy to maintenance.And it is low to the utlity model has the compact conformation cost, and the characteristics that volume is little are applicable to the current measurement of 10kV circuit, are the special equipments of circuit auto-reactive compensation, has avoided traditional instrument transformer that loaded down with trivial details problem is installed.
The elongated open pipe of employing described in the utility model has the hollow open design, and which is provided with the bulge-structure that is used for fixing described current transformer main body, described bulge-structure and described current transformer main body axial width adapt, and make that described current transformer main body is easier for installation, fastening.Carriage of the present utility model adopts Y type elastic silicone rubber material to make, and has guaranteed that the effect by frictional force is fixed on current transformer on the cable in the installation process, has prevented the wearing and tearing of lead swing to the instrument transformer inboard again.Analog bracket has the effect that slows down the tension force that current transformer bears, and has avoided the suffered tension force phenomenon of conventional current instrument transformer, thereby has guaranteed the stability and security of circuit.
The used fastening bolt (stainless steel bolt) of the utility model adopts non-magnet_conductible material to make, and has functions such as anti-eddy current, antistatic, and stainless steel fastening bolt tightness is good, can reduce the leakage field phenomenon, makes measurement data accurate, stable, reliable.
The utility model has adopted iron core chamfering technology, and the iron core in traditional rectangular cross section carries out chamfered, has reduced because iron core corner angle burr produces the phenomenon of partial discharge, thereby has guaranteed the dielectric strength and the fail safe of product.
The technology that the utility model has adopted the insulation blocking module that one sub-high pressure and secondary monitoring equipment are isolated by the sealing of insulation blocking box, has protection against the tide, function such as dustproof with original instrument transformer outlet terminal, has guaranteed the fail safe of operation maintenance after the wiring.
The utility model has adopted the silicon rubber insulation pillar, has anti-aging, uvioresistant and resistant to pollution characteristic.Its effect is the creepage distance that increases high-voltage line and earth point, thereby has ensured the safe operation of circuit.
The utility model has adopted the silicon rubber protective cover, can protect current transformer main body of the present utility model better, prolongs its useful life, and this protective cover has anti-aging, uvioresistant, anti-pollution and dampproof effect.
Description of drawings
Fig. 1 is the perspective view of the Open Type Electric Current Mutual Inductor of the utility model embodiment.
Fig. 2 is the structural representation of the elongated open pipe of the damage of reducing friction of the Open Type Electric Current Mutual Inductor of the utility model embodiment.
Fig. 3 is the insulation blocking modular cartridge structural representation of the Open Type Electric Current Mutual Inductor of the utility model embodiment.
Fig. 4 is the utility model analog bracket structural representation.
Fig. 5 is the structural representation of protective cover of the present utility model.
Fig. 6 is for the Open Type Electric Current Mutual Inductor main body of the utility model embodiment shown in Figure 1 and structural representation after protective cover of the present utility model shown in Figure 5 combines.
Embodiment
Main thought of the present utility model is to be set to two semi-round ring shapes that are complementary by iron core, enamelled wire is wound on wherein the annular semicircle iron core, and on the iron core that secondary winding is twined, increase insulating barrier, thereby make the utility model can realize measurement to the high-tension line electric current.The utility model also will dock the main body of formation instrument transformer after two independent encapsulation of semi-round ring shape iron cores difference.Like this, the iron core of two butt joints is convenient when installing and dismantle.
Below in conjunction with accompanying drawing the utility model preferred implementation is elaborated.
With reference to shown in Figure 1, be the perspective view of the Open Type Electric Current Mutual Inductor of the utility model embodiment.The outdoor open-type current transformer 10 of present embodiment; mainly comprise iron core, secondary winding and insulation blocking module; described iron core comprises upper and lower semi-round ring shape iron core; described secondary winding is wound on one of them semi-round ring shape iron core, and the semi-round ring shape iron core of described secondary winding coiling is provided with insulating barrier.Described upper and lower semi-round ring shape iron core and secondary winding use poured with epoxy resin respectively in last shell 101 and lower casing 102,102 pairs of last shell 101 and lower casings are connected into an integral body, form current transformer main body 10, current transformer main body 10 comprises an endoporus 103 at this moment.In the present embodiment, described upward shell 101 and lower casing 102 are insulation, fire-retardant, anti-aging and antiultraviolet housing.Certainly.Describedly go up shell 101 and lower casing 102 also can adopt other to make with new material,, all can be adopted by the utility model as long as can realize the utility model purpose.
Be provided with elongated open pipe 13 in the included endoporus 103 of described current transformer main body 10.With reference to shown in Figure 2, the structural representation of the elongated open pipe that damages for reducing friction of the Open Type Electric Current Mutual Inductor of the utility model embodiment.Described elongated open pipe 13 makes Outdoor Current Transformer and cable secure fit to be measured when being used to clamp cable to be measured, is convenient to Outdoor Current Transformer is installed on the primary measured lead.In the present embodiment, described elongated open pipe 13 is a silastic material, comprise two projectioies on the described elongated open pipe 13, first projection 131, second projection 132, distance between described first projection 131, second projection 132 adapts with current transformer main body 10 axial width dimension, so that current transformer main body 10 can be fixed in first projection 131, second projection, the 132 formed grooves 201.When Open Type Electric Current Mutual Inductor main body 10 of the present utility model was installed, last shell 101 was that lower casing 102 is located by first projection 131, second projection 132 on the described elongated open pipe 13, and the outdoor open-type current transformer is shifted when having avoided on-the-spot installation.
And for example shown in Figure 1, be provided with place's opening at elongated open pipe 13 upper edge axis directions, so that elongated open pipe 13 can be installed on the cable under test smoothly.In the present embodiment; described first projection 131, second projection 132 all are set to O shape circle; in the practical application; described first projection 131, second projection 132 also can be set to other shape and structure; as long as can realize instrument transformer is carried out fixed shape and structure; can be adopted by the utility model, all within protection range of the present utility model.And described elongated open pipe 13 also can adopt other wear-resisting aging-resistant elastomeric materials to make.
Certainly; described elongated open pipe 13 also can be arranged to other shape during actual the use; this has just constituted additional embodiments of the present utility model; as long as can realize with Outdoor Current Transformer and the cable to be measured shape of secure fit in addition; can be adopted by the utility model, all within protection range of the present utility model.
In order to realize two iron core butt joints with present embodiment, present embodiment has adopted the stainless steel fastening bolt to fix and has gone up shell 101 and lower casing 102, the last shell 101 that will encapsulate two iron cores by restraint zone docks in aggregates with lower casing 102, form current transformer main body 10.This fastening bolt adopts non-magnet_conductible material (stainless steel) manufacturing to form, and not only have the function of anti-eddy current, and tightness is good, can make the butt joint of two semi-round ring shape iron cores and secondary coil good, thereby has prolonged the useful life of product.The utility model and at current transformer 10 main body arranged outside circular holes is used to penetrate described stainless steel fastening bolt, avoided coming off of fastening bolt in the installation process.
The utility model has adopted iron core chamfering technology, and the iron core in traditional rectangular cross section is carried out chamfered, has reduced because iron core corner angle burr produces the phenomenon of partial discharge, thereby has guaranteed the dielectric strength and the fail safe of product.Secondary coil has secondary outlet insulation blocking module and earth connection.The secondary outlet terminal is by insulation blocking modular cartridge 301 (shown in Figure 3) sealing, has functions such as dustproof, protection against the tide, in the useful life that has strengthened instrument transformer, also helps the maintenance of equipment.Described insulation blocking module is provided with the malfunction monitoring indicator light, can realize malfunction is monitored.
Described current transformer also comprises insulation column 14, analog bracket 15.With reference to shown in Figure 4, be the utility model analog bracket 15 structural representations.In order to realize the purpose of this utility model, and reach the aging-resistant effect, insulation column 14 of the present utility model, analog bracket 15 all are set to silastic material, certainly, also can adopt other materials in concrete the application, and the utility model is not limited this.
With reference to shown in Figure 5, be the structural representation of protective cover of the present utility model.For current transformer main body 10 of the present utility model is carried out better protection, the utility model is provided with protective cover 16, can be set to silastic material, certainly, also can adopt other materials in concrete the application.
With reference to shown in Figure 6, for the Open Type Electric Current Mutual Inductor main body 10 of the utility model embodiment shown in Figure 1 and structural representation after protective cover of the present utility model 16 shown in Figure 5 combines.After analog bracket 15, insulation column 14, current transformer main body 10 installed successively, protective cover 16 is placed outside the current transformer main body 10, the utility model just can come into operation again.Analog bracket 15 of the present utility model adopts Y type elastic silicone rubber material to make, and has guaranteed that the effect by frictional force is fixed on current transformer on the cable in the installation process, has prevented the wearing and tearing of lead swing to the instrument transformer inboard again.Certainly can also adopt other materials in the practical application, the utility model is not limited this.
As seen, the utility model is set to the semi-round ring shape of two butt joints by iron core, and twines therein to increase on the iron core of secondary winding insulating barrier is set, and realizes the measurement to the high-tension line electric current.The utility model is compared with the conventional current instrument transformer, installs simple, easy to maintenance.And the utlity model has the characteristics that volume is little, in light weight, cost is low, be applicable to the current measurement of 10kV circuit, is circuit reactive power compensation special equipment.
Need to prove; the above only is preferred embodiment of the present utility model; rather than to the qualification of technical solutions of the utility model, any the utility model technical characterictic being equal to of being done replaced or corresponding improvement, still within protection range of the present utility model.
Claims (12)
1. outdoor open-type current transformer, it is characterized in that, the semi-round ring shape iron core and the secondary coil that comprise two mutually insulateds, described secondary coil is wound on one of them semi-round ring shape iron core, the semi-round ring shape iron core of described coiling secondary coil is provided with insulating barrier, and described two semi-round ring shape iron cores are to being connected into a current transformer main body.
2. outdoor open-type current transformer as claimed in claim 1, it is characterized in that, described current transformer also comprises the elongated open pipe, described elongated open pipe is provided with the opening that a place is provided with along axis direction at least, and described elongated open pipe is arranged within the endoporus of described two semi-round ring shape iron cores butt joint formation.
3. outdoor open-type current transformer as claimed in claim 2 is characterized in that, comprises first projection and second projection on the described elongated open pipe, and the distance between described first projection and second projection adapts with described current transformer axial width.
4. outdoor open-type current transformer as claimed in claim 1 is characterized in that, described current transformer also comprises two shells, is respectively applied for described two the semi-round ring shape iron cores of encapsulation.
5. outdoor open-type current transformer as claimed in claim 4 is characterized in that, described two semi-round ring shape iron cores are cast in described two shells with epoxy resin mixed glue respectively.
6. outdoor open-type current transformer as claimed in claim 5 is characterized in that, described two shells are in aggregates by the butt joint of stainless steel fastening bolt.
7. outdoor open-type current transformer as claimed in claim 1 is characterized in that, at least one described semi-round ring shape iron core comprises the corner angle through chamfered.
8. outdoor open-type current transformer as claimed in claim 1 is characterized in that described current transformer also comprises the insulation blocking module, and the secondary outlet terminal is by described insulation blocking module sealing.
9. outdoor open-type current transformer as claimed in claim 8 is characterized in that, described insulation blocking module is provided with the malfunction monitoring indicator light.
10. outdoor open-type current transformer as claimed in claim 1 is characterized in that described current transformer also comprises protective cover, is arranged at outside the described current transformer main body.
11. outdoor open-type current transformer as claimed in claim 1 is characterized in that described current transformer also comprises the insulation column that is used to support described current transformer main body, closely is connected with described current transformer main body.
12. outdoor open-type current transformer as claimed in claim 11 is characterized in that described current transformer also comprises analog bracket, is connected with described insulation column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201106224U CN201498350U (en) | 2009-07-31 | 2009-07-31 | Outdoor open current mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201106224U CN201498350U (en) | 2009-07-31 | 2009-07-31 | Outdoor open current mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201498350U true CN201498350U (en) | 2010-06-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201106224U Expired - Fee Related CN201498350U (en) | 2009-07-31 | 2009-07-31 | Outdoor open current mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201498350U (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102360893A (en) * | 2011-07-07 | 2012-02-22 | 王伟坤 | Open/close type electronic bushing current transformer |
| CN102411076A (en) * | 2010-09-22 | 2012-04-11 | 陈家斌 | Outdoor high-voltage electrified installation and removal electric energy metering device |
| CN102419384A (en) * | 2010-09-24 | 2012-04-18 | 陈家斌 | Low-voltage electric energy metering device capable of being assembled and disassembled in electrified state |
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
| CN103474223A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | High-voltage equipotential opening current transformer |
| CN103680903A (en) * | 2013-11-26 | 2014-03-26 | 江苏科兴电器有限公司 | Current transformer capable of being started outdoors |
| CN104133103A (en) * | 2014-07-31 | 2014-11-05 | 国网浙江余姚市供电公司 | Device for monitoring overhead wire load currents |
| CN104170195A (en) * | 2012-01-19 | 2014-11-26 | 海德罗-魁北克公司 | Device for an outdoor switching apparatus |
| CN105259396A (en) * | 2015-11-03 | 2016-01-20 | 三峡大学 | Electronic current transformer which is installable and dismountable in electrified manner |
| CN105304304A (en) * | 2015-10-26 | 2016-02-03 | 常州欧瑞电气有限公司 | Current transformer for self-powered microprocessor protection device |
| CN103811165B (en) * | 2012-11-07 | 2017-02-08 | 江苏思源赫兹互感器有限公司 | Outer-winding type current transformer |
| CN108680781A (en) * | 2018-07-09 | 2018-10-19 | 广东电网有限责任公司 | Current transformer and split-core type meter |
-
2009
- 2009-07-31 CN CN2009201106224U patent/CN201498350U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102411076A (en) * | 2010-09-22 | 2012-04-11 | 陈家斌 | Outdoor high-voltage electrified installation and removal electric energy metering device |
| CN102419384A (en) * | 2010-09-24 | 2012-04-18 | 陈家斌 | Low-voltage electric energy metering device capable of being assembled and disassembled in electrified state |
| CN102360893A (en) * | 2011-07-07 | 2012-02-22 | 王伟坤 | Open/close type electronic bushing current transformer |
| CN104170195A (en) * | 2012-01-19 | 2014-11-26 | 海德罗-魁北克公司 | Device for an outdoor switching apparatus |
| CN104170195B (en) * | 2012-01-19 | 2017-05-03 | 海德罗-魁北克公司 | Device for outdoor switch equipment |
| CN103811165B (en) * | 2012-11-07 | 2017-02-08 | 江苏思源赫兹互感器有限公司 | Outer-winding type current transformer |
| CN103050264A (en) * | 2012-12-12 | 2013-04-17 | 北京航空航天大学 | Multiple-transformation-ratio selectable outdoor open-type current transformer |
| CN103474223B (en) * | 2013-08-20 | 2016-01-27 | 国家电网公司 | The equipotential opening current transformer of a kind of high pressure |
| CN103474223A (en) * | 2013-08-20 | 2013-12-25 | 国家电网公司 | High-voltage equipotential opening current transformer |
| CN103680903A (en) * | 2013-11-26 | 2014-03-26 | 江苏科兴电器有限公司 | Current transformer capable of being started outdoors |
| CN104133103A (en) * | 2014-07-31 | 2014-11-05 | 国网浙江余姚市供电公司 | Device for monitoring overhead wire load currents |
| CN105304304A (en) * | 2015-10-26 | 2016-02-03 | 常州欧瑞电气有限公司 | Current transformer for self-powered microprocessor protection device |
| CN105304304B (en) * | 2015-10-26 | 2017-07-04 | 常州欧瑞电气股份有限公司 | Self-powered microcomputer protecting device Current Transformer |
| CN105259396A (en) * | 2015-11-03 | 2016-01-20 | 三峡大学 | Electronic current transformer which is installable and dismountable in electrified manner |
| CN108680781A (en) * | 2018-07-09 | 2018-10-19 | 广东电网有限责任公司 | Current transformer and split-core type meter |
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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: BEIJING RICHANG-SCIENCE TRANSFORMER EQUIPMENT CO., Free format text: FORMER OWNER: OPPFLYTECH ELECTRIC (BEIJING) CO., LTD. Effective date: 20111202 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100055 XUANWU, BEIJING TO: 101407 HUAIROU, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111202 Address after: 101407 Beijing city Huairou District Yanqi Economic Development Zone East Road No. 68 Yan two building 3 Patentee after: Beijing Ruiqien Transformer Equipment Co., Ltd. Address before: 100055, room 1, Hua Hua building, building 6, 1013 street, South Street, Xuanwu District, Beijing Patentee before: Oppfly-tech Electric (Beijing) Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100602 Termination date: 20130731 |