CN101447328B - Open-close type current transformer - Google Patents
Open-close type current transformer Download PDFInfo
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- CN101447328B CN101447328B CN2008102120318A CN200810212031A CN101447328B CN 101447328 B CN101447328 B CN 101447328B CN 2008102120318 A CN2008102120318 A CN 2008102120318A CN 200810212031 A CN200810212031 A CN 200810212031A CN 101447328 B CN101447328 B CN 101447328B
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Abstract
The invention discloses an open-close type current transformer, comprising a shell, an iron core, a coil and a connecting terminal. The iron core consists of two iron cores which can be assembled into a square ring shape; the shell is a hollow square shell and consists of an upper shell and a rectangular lower shell; the front surface and the rear surface of the shell are inverted concave shape; the inner part of the upper shell is encapsulated with a big iron core; the inner part of the lower shell is encapsulated with a small iron core; and the upper shell and the lower shell are fixed by a connecting pawl and screws which are convenient to be disassembled. The transformer does not disassemble a circuit to be measured when in maintenance and exchanging, has convenient disassembling and high working efficiency and simultaneously has the protecting function of preventing electrical larceny, easy manufacture, low cost and wide market prospect.
Description
Technical field
The present invention relates to electric equipment, specifically is a kind of open-close type current transformer easily of safeguarding and change.
Background technology
At present, measuring the electric current electric energy in the low-voltage alternating-current circuit, is that current transformer is enclosed within on the electric line, and line current is sampled.Present current transformer mainly comprises housing, over cap, coil, iron core and binding post; there is following defective in its structure: 1, current transformer is when periodic maintenance and replacing; the primary measured loop of indoor switch cubicle to be taken apart, like this inefficiency, trouble again.2, current transformer require rated transformation ratio is protected, and most of secondary connections of existing homemade low-voltage current mutual inductor is open, do not have anti-electricity-theft over cap, are easy to be replaced current ratio, thereby obtain illegal electric energy as measuring products the time.3, the iron core of existing instrument transformer mostly is annular core greatly, the coil winding inconvenience, and iron core through behind this procedure, damages secondary coil when heavier easily, increases defective item.4, the instrument transformer of existing square iron core mostly is lamination greatly, and the lamination end face is smooth inadequately, and the lamination coefficient is lower, leakage field is bigger, has increased the copper material of the long-pending and secondary winding of core section accordingly, has increased cost.5, have only a screw wiring mostly on the existing homemade low-voltage current mutual inductor secondary terminal, can not satisfy the requirement of client's available for different connection modes.6, the most of mounting meanss of existing homemade low pressure instrument transformer are to be fixed on the appliance mounting panel with the bottom support frame, and mounting means is single.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, a kind of convenient, easy to manufacture, with low cost, as to have anti-electricity-theft defencive function a kind of open-close type current transformer of safeguarding and change is provided.
The object of the present invention is achieved like this: a kind of open-close type current transformer, it comprises housing, iron core, coil, binding post is characterized in that: described iron core can constitute by the annular iron core in the side of being spliced into by two, and wherein top is big iron core, following is little iron core, is being wound with coil on big iron core; Described housing is a hollow square housing, and it is made of upper shell and the cuboid lower house that front-back is down " recessed " font; Upper shell is made of front casing that is fixed together and rear casing, the big iron core of the inner encapsulation of upper shell, all there is the connection pawl both sides, lower end of upper shell, and connecting on the pawl has screw hole, on two angles of upper shell upper end binding post and terminal cap are set, on upper shell and the terminal cap lead seal hole are arranged; Lower house is made of front casing that is fixed together and rear casing, the little iron core of the inner encapsulation of lower house, the following installation iron core closed impaction spring of little iron core, the two ends of lower house all have and are connected corresponding connecting hole of pawl and screw hole, the installation supporter are arranged below the lower house; The connection pawl of upper shell inserts in the connecting hole of lower house, by being through just tearing screw open and will go up lower house and be fixed together on the screw hole.
The fixed installation of instrument transformer is provided with the installation draw-in groove in the front and back of upper shell, and has been equipped with mounting screw for convenience, and the installation nut is arranged on the mounting screw, on the top of mounting screw insulating case is arranged.This design can be suspended on instrument transformer on the bus copper bar in tested loop, has increased the alternative of mounting means.
Described coil comprises square tube shape coil rack.Aborning, enamelled wire can be wound on the skeleton, be set on the big iron core, make things convenient for coil winding, improve operating efficiency, also avoid damaging in the coil winding process simultaneously.
Described big iron core and little iron core are to be formed by the several layers silicon steel plate stacking.General it be to turn to squarely earlier by the thick directional silicon steel of 0.23mm, through annealing, vacuum paint dipping is cut open by required size after solidifying, end face polishes and forms.
For safety, reached eye-catching caution effect, described terminal cap is red.
The present invention compared with prior art has following advantage:
1, owing to adopt retractable structure, when instrument transformer is safeguarded and change, needn't remove tested loop, easy disassembling, high efficiency.
2, be provided with terminal cap and lead seal hole on binding post, avoided the user to change the generation of current ratio stealing electricity phenomenon, the binding post easy-to-connect can satisfy the requirement of client's available for different connection modes.
3, adopted the open-close type iron core, aborning, color painting wire can be wound on the skeleton, be set in then on the big iron core, made things convenient for coil winding, improved operating efficiency, also avoided damaging in the coil winding process simultaneously.
4, the iron core of this structure can adopt cutting mode production, and end face is smooth, and the spring precompressed is adopted in bottom unshakable in one's determination, and end face has reduced the leakage field air gap, thereby reduced area of core section in conjunction with more tight, has reduced cost.
5, be provided with the installation draw-in groove in the front and back of upper shell, and be equipped with mounting screw, for instrument transformer provides multiple mounting means.
Description of drawings
Fig. 1 is that open-close type current transformer parts of the present invention launch perspective view;
Fig. 2 is an open-close type current transformer split state perspective view of the present invention;
Fig. 3 is the fit state perspective view of open-close type current transformer of the present invention.
Among the figure, 1. just tear screw open, 2. lower house rear casing, 3. little iron core, 4. holddown spring is 5. installed supporter, the 6. screw hole on the connecting hole, 7. lower house front casing, 8. the screw hole on the connection pawl is 9. installed draw-in groove, 10. insulating case, 11. mounting screws, 12. the installation nut, 13. lead seal holes, 14. upper shell front casings, 15. terminal cap, 16. coils, 17. coil racks, 18. binding post, 19. big iron cores, 20. upper shell rear casings.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, a kind of open-close type current transformer, it comprises housing, iron core, coil, binding post, described iron core can constitute by the annular iron core in the side of being spliced into by two, wherein is big iron core 19, and following is little iron core 3, is wound with coil 16 on big iron core 19; Described housing is a hollow square housing, and it is made of upper shell and the cuboid lower house that front-back is down " recessed " font; Upper shell is made of front casing 14 that is fixed together and rear casing 20, the big iron core 19 of the inner encapsulation of upper shell, all there is the connection pawl both sides, lower end of upper shell, connect on the pawl screw hole 8 is arranged, on two angles of upper shell upper end binding post 18 and terminal cap 15 are set, lead seal hole 13 is arranged on upper shell and the terminal cap; Lower house is made of front casing 7 that is fixed together and rear casing 2, the little iron core 3 of the inner encapsulation of lower house, the following installation iron core closed impaction spring 4 of little iron core 3, the two ends of lower house all have and are connected corresponding connecting hole of pawl and screw hole 6, and the supporter 5 of installation is arranged below the lower house; The connection pawl of upper shell inserts in the connecting hole of lower house, by being through just tearing screw 1 open and will go up lower house and be fixed together on the screw hole 6,8.Be provided with installation draw-in groove 9 in the front and back of upper shell, and be equipped with mounting screw 11, the nut 12 of installation is arranged on the mounting screw 11, insulating case 10 is arranged on the top of mounting screw 11.Described coil comprises square tube shape coil rack 17.Described big iron core 19 and little iron core 3 are to be overrided to form by several layers silicon steel.Described terminal cap 15 is red.
As shown in Figure 2, will just tear screw 1 open and from screwing hole 6,8, extract out, can be with open-close type current transformer of the present invention, can take apart is two parts.
As shown in Figure 3, the connection pawl of upper shell is inserted in the connecting hole of lower house, by being through just tearing screw 1 open and will go up lower house and be fixed together on the screw hole 6,8.
Claims (8)
1. open-close type current transformer, it comprises housing, iron core, coil, binding post is characterized in that: described iron core can constitute by the annular iron core in the side of being spliced into by two, wherein is big iron core (19), and following is little iron core (3), is wound with coil (16) on big iron core (19); Described housing is a hollow square housing, and it is made of upper shell and the cuboid lower house that front-back is down " recessed " font; Upper shell is made of front casing that is fixed together (14) and rear casing (20), the inner encapsulation of upper shell big iron core (19), all there is the connection pawl both sides, lower end of upper shell, connect on the pawl screw hole (8) is arranged, on two angles of upper shell upper end binding post (18) and terminal cap (15) are set, lead seal hole (13) is arranged on upper shell and the terminal cap (15); Lower house is made of front casing that is fixed together (7) and rear casing (2), the inner encapsulation of lower house little iron core (3), the following installation iron core closed impaction spring (4) of little iron core (3), the two ends of lower house all have and are connected corresponding connecting hole of pawl and screw hole (6), installation supporter (5) are arranged below the lower house; The connection pawl of upper shell inserts in the connecting hole of lower house, by being through just tearing screw (1) open and will go up lower house and be fixed together on the screw hole (6,8).
2. according to the described open-close type current transformer of claim 1, it is characterized in that: be provided with in the front and back of upper shell draw-in groove (9) is installed, and be equipped with mounting screw (11), and installation nut (12) is arranged on the mounting screw, on the top of mounting screw (11) insulating case (10) is arranged.
3. according to claim 1 or 2 described open-close type current transformers, it is characterized in that: described coil (16) comprises square tube shape coil rack (17).
4. according to claim 1 or 2 described open-close type current transformers, it is characterized in that: described big iron core (19) and little iron core (3) are to be formed by the several layers silicon steel plate stacking.
5. according to the described open-close type current transformer of claim 3, it is characterized in that: described big iron core (19) and little iron core (3) are to be formed by the several layers silicon steel plate stacking.
6. according to claim 1 or 2 described open-close type current transformers, it is characterized in that: described terminal cap (15) is for red.
7. according to the described open-close type current transformer of claim 3, it is characterized in that: described terminal cap (15) is for red.
8. according to the described open-close type current transformer of claim 4, it is characterized in that: described terminal cap (15) is for red.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102120318A CN101447328B (en) | 2008-09-12 | 2008-09-12 | Open-close type current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102120318A CN101447328B (en) | 2008-09-12 | 2008-09-12 | Open-close type current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101447328A CN101447328A (en) | 2009-06-03 |
| CN101447328B true CN101447328B (en) | 2010-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102120318A Active CN101447328B (en) | 2008-09-12 | 2008-09-12 | Open-close type current transformer |
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| Country | Link |
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| CN (1) | CN101447328B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707128B (en) * | 2009-11-08 | 2011-07-20 | 江阴市星火电子科技有限公司 | Magnetic circuit open-close type current transformer |
| CN102721884A (en) * | 2012-06-21 | 2012-10-10 | 平高集团有限公司 | Testing apparatus for excitation characteristics of iron cores of mutual inductors and winding structure using testing apparatus |
| CN104391520A (en) * | 2014-10-27 | 2015-03-04 | 国家电网公司 | Safe and energy-saving cooling device for power distribution cabinet |
| CN105405623A (en) * | 2015-11-20 | 2016-03-16 | 国网山东省电力公司电力科学研究院 | Open type transformer |
| CN105405627B (en) * | 2016-01-06 | 2017-08-15 | 浙江天际互感器有限公司 | A kind of fast insert-pull open-close type current transformer |
| CN105469967B (en) * | 2016-01-06 | 2018-01-16 | 浙江天际互感器有限公司 | Outdoor open-close type current transformer is pressed in one kind |
| KR101946972B1 (en) * | 2016-08-05 | 2019-02-12 | 주식회사 아모센스 | Core for current transformer |
| CN108987083A (en) * | 2018-07-16 | 2018-12-11 | 江阴市星火电子科技有限公司 | A kind of assembly technology of indoor open-close type mutual inductor |
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2008
- 2008-09-12 CN CN2008102120318A patent/CN101447328B/en active Active
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| Publication number | Publication date |
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| CN101447328A (en) | 2009-06-03 |
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Owner name: ZHEJIANG DIXSEN ELECTRICAL APPLIANCE CO., LTD. Free format text: FORMER OWNER: ZHENG YUANBAO Effective date: 20110107 |
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Free format text: CORRECT: ADDRESS; FROM: 325604 NO. 1, LANE 14, XIANGYANG ROAD, LIUSHI TOWN, LEQING CITY, ZHEJIANG PROVINCE TO: 325603 DAQIAO INDUSTRIAL PARK, WENZHOU, LEQING CITY, ZHEJIANG PROVINCE |
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Effective date of registration: 20110107 Address after: 325603 Wenzhou Bridge Industrial Zone, Zhejiang, Yueqing Patentee after: Zhejiang Dixsen Electrical Co., Ltd. Address before: Yueqing City, Zhejiang province 325604 Liushi Zhen Xiang Yang Road 14 Lane 1 Patentee before: Zheng Yuanbao |
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