CN202352508U - Low-voltage combined three-phase current transformer - Google Patents
Low-voltage combined three-phase current transformer Download PDFInfo
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- CN202352508U CN202352508U CN2011204588739U CN201120458873U CN202352508U CN 202352508 U CN202352508 U CN 202352508U CN 2011204588739 U CN2011204588739 U CN 2011204588739U CN 201120458873 U CN201120458873 U CN 201120458873U CN 202352508 U CN202352508 U CN 202352508U
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- binding post
- current transformer
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Abstract
The utility model relates to a low-voltage combined three-phase current transformer, which is applied to 0.66kV and below 0.66kV low-voltage intelligent power distribution terminal systems for acquiring current signals. The low-voltage combined three-phase current transformer comprises a housing (1), a cover plate (2), a group of secondary windings (3) which are arranged in the housing (1) and consist of three coils, and four wiring terminals which are arranged on the top of the housing (1). The three coils are a first coil (3-1), a second coil (3-2) and a third coil (3-3); secondary outlets of the first coil are a first outlet I (1S1) and a second outlet I (N'); secondary outlets of the second coil are a first outlet II (2S1) and a second outlet II (N''); secondary outlets of the third coil are a first outlet III (3S1) and a second outlet III (N'''); and the current transformer generates 5A or 1A standard alternating current signals or milliampere micro-current signals. The low-voltage combined three-phase current transformer has the advantages of small volume, simple wiring mode, low cost and long transmission distance.
Description
Technical field
The utility model relates to a kind of current transformer (hereinafter to be referred as instrument transformer), is used for 0.66kV and following low-voltage intelligent distribution terminal system to current signals.
Background technology
The current transformer external form that existing market is sold is all more identical, and performance is also similar basically, and the function of many low-voltage intelligent distribution terminals system is powerful day by day; Can gather the multiloop system electric current; Require the volume of instrument transformer also more and more littler, wiring is also fairly simple, and cost is lower; Also some occasion transmission range is distant, and conventional for this reason low-voltage current mutual inductor is difficult to satisfy this requirement.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency, provides a kind of volume little, and wiring is fairly simple, and cost is lower, the low-voltage combined type threephase current transformer that transmission range is distant.
The purpose of the utility model is achieved in that a kind of low-voltage combined type threephase current transformer; Said instrument transformer comprises housing, cover plate and is arranged in the housing the one group secondary winding of being made up of three coils and four binding posts that are arranged at said case top; Said three coils are respectively first coil, second coil and tertiary coil; The secondary outlet of said first coil is the first outlet I and the second outlet I; The secondary outlet of second coil is the first outlet II and the second outlet II, and the secondary outlet of tertiary coil is the first outlet III and the second outlet III; Said four binding posts are respectively first binding post, second binding post, the 3rd binding post and the 4th binding post; It is 5A or 1A or milliampere little current signal of level that said current transformer goes out the standard AC signal.
The utility model low-voltage combined type threephase current transformer; Said housing inner chamber is provided with three coil installing holes; Corresponding respectively three the coil installing holes of first coil, second coil and tertiary coil are packed in the housing; The first outlet I of the first coil secondary outlet is welded on first binding post; The first outlet II of the second coil secondary outlet is welded on second binding post; The first outlet III of tertiary coil secondary outlet is welded on the 3rd binding post, and the second outlet III N ' ' ' of the second outlet I N ' of the first coil secondary outlet, the second outlet II N ' ' of the second coil secondary outlet, the outlet of tertiary coil secondary links together jointly and is ground connection, and is welded on the 4th binding post.
The utility model low-voltage combined type threephase current transformer, said case top are provided with four wiring holes and four terminals pilot trench; Respectively with first binding post, second binding post, the 3rd binding post and the 4th binding post four the terminals pilot trench of packing into.
The utility model low-voltage combined type threephase current transformer, said case top are provided with three reinforcement button grooves, are provided with the bonding wire groove around the housing front; Top, the said cover plate back side is provided with three reinforcement buttons, is provided with bonding wire around the cover plate back side; Three reinforcement buttons at top, the cover plate back side and the bonding wire around the cover plate back side are respectively charged into three the reinforcement button grooves of case top and the bonding wire groove in housing front.
The utility model low-voltage combined type threephase current transformer, said case top are provided with three reinforcement button grooves, are provided with the bonding wire groove around the housing front; Top, the said cover plate back side is provided with three reinforcement buttons, is provided with bonding wire around the cover plate back side; Three reinforcement buttons at top, the cover plate back side and the bonding wire around the cover plate back side are respectively charged into three the reinforcement button grooves of case top and the bonding wire groove in housing front.
The beneficial effect of the utility model is:
A kind of low-voltage combined type threephase current transformer of the utility model is combined three monophase current instrument transformers of routine, can reduce the volume of three instrument transformers greatly; Both can be used for also can being used for the remote transmission of current signal, during installation to current signals; As long as installing hole place in two ends is fixed just passable, only need connect four lines during secondary connection and just can accomplish being connected of instrument transformer and measurement mechanism, compare in the instrument transformer installation connection with three of routines are single-phase; Can practice thrift two leads, practice thrift the set-up time, and the cost of instrument transformer be lower than three single-phase transformers; So the utility model instrument transformer is both economical, transmission range is distant.
Description of drawings
Fig. 1 is the perspective view of the utility model low-voltage combined type threephase current transformer.
Fig. 2 is the internal structure sketch map of the utility model low-voltage combined type threephase current transformer.
Fig. 3 is the perspective view of the housing of the utility model.
Fig. 4 is the Facad structure sketch map of Fig. 3.
Fig. 5 is the structure sketch map of Fig. 3.
Fig. 6 is the vertical view of Fig. 3.
Fig. 7 is the Facad structure sketch map of the cover plate of the utility model.
Fig. 8 is the vertical view of Fig. 7.
Fig. 9 is the secondary winding structural representation of the utility model.
Figure 10 is the fundamental diagram of the utility model.
Reference numeral among the figure:
Housing 1, wiring hole 1-1, terminals pilot trench 1-2, installing hole 1-3, reinforcement button groove 1-4, bonding wire groove 1-5;
Cover plate 2, reinforcement button 2-1, bonding wire 2-2;
First binding post 4
Second binding post 5
The 3rd binding post 6
The 4th binding post 7.
Embodiment
Referring to Fig. 1 ~ 2, Fig. 1 is the perspective view of the utility model low-voltage combined type threephase current transformer.Fig. 2 is the internal structure sketch map of the utility model low-voltage combined type threephase current transformer.Can find out by Fig. 1 and Fig. 2; The utility model low-voltage combined type threephase current transformer is made up of housing 1, cover plate 2 and binding post first binding post 4, second binding post 5, the 3rd binding post 6, the 4th binding post 7 and the relevant mounting bracket that are arranged in the housing 1 the one group secondary winding of being made up of three identical coils 3, four identical sizes.
Referring to Fig. 3 ~ 6, Fig. 3 is the perspective view of the housing of the utility model.Fig. 4 is the Facad structure sketch map of Fig. 3.Fig. 5 is the structure sketch map of Fig. 3.Fig. 6 is the vertical view of Fig. 3.Can find out by Fig. 3 ~ 6; Said housing 1 inner chamber is provided with L1, L2 and three coil installing holes of L3; Housing 1 top is provided with four identical wiring hole 1-1, four reinforcement button groove 1-4 that identical terminals pilot trench 1-2 is identical with three; Housing 1 two bottom sides is provided with two identical installing hole 1-3, the housing 1 positive bonding wire groove 1-5 that is provided with all around.
Referring to Fig. 7 ~ 8, Fig. 7 is the Facad structure sketch map of the cover plate of the utility model.Fig. 8 is the vertical view of Fig. 7.Can find out that by Fig. 7 ~ 8 top, said cover plate 2 back side is provided with three identical reinforcement button 2-1, be provided with bonding wire 2-2 around cover plate 2 back sides.
Referring to Fig. 9, Fig. 9 is the secondary winding structural representation of the utility model.Can find out that by Fig. 9 said secondary winding 3 is made up of the first coil 3-1, the second coil 3-2 and tertiary coil 3-3.The secondary outlet of the said first coil 3-1 is the first outlet I 1S1 and the second outlet I N '; The secondary outlet of the second coil 3-2 is the first outlet II 2S1, the second outlet II N ' ', and the secondary outlet of tertiary coil 3-3 is the first outlet III 3S1 and the second outlet III N ' ' '.The first coil 3-1, the second coil 3-2 and tertiary coil 3-3 corresponding respectively three coil installing hole L1, L2 and L3 are packed in the housing 1; The first outlet I 1S1 of the first coil 3-1 secondary outlet is welded on first binding post 4; The first outlet II 2S1 of the second coil 3-2 secondary outlet is welded on second binding post 5; The first outlet III 3S1 of tertiary coil 3-3 secondary outlet is welded on the 3rd binding post 6; The second outlet II N ' ' of the second outlet I N ' of the first coil 3-1 secondary outlet, the second coil 3-2 secondary outlet, the second outlet III N ' ' ' of tertiary coil 3-3 secondary outlet link together to ground connection (
) jointly, are welded on the 4th binding post 7.Respectively first binding post 4, second binding post 5, the 3rd binding post 6 and the 4th binding post 7 are packed among four identical terminals pilot trench 1-2 then; Cover cover plate 2; Be respectively charged into three the identical reinforcement button groove 1-4 at housing 1 top and the bonding wire groove 1-5 in housing 1 front with the bonding wire 2-2 around three of top, cover plate 2 back side identical reinforcement button 2-1 and cover plate 2 back sides this moment; With ultrasonic welding machine housing 1 and cover plate 2 are fixed together; Load onto related accessory, the utility model assembling is accomplished.It is 5A or 1A or milliampere little current signal of level that the utility model low-voltage combined type threephase current transformer goes out the standard AC signal.
The operation principle of the utility model:
Referring to Figure 10, Figure 10 is the fundamental diagram of the utility model.A windings in series of the utility model low-voltage combined type threephase current transformer is in test line; I1 is that line current is the primary current of current transformer; N1 is a number of turn of current transformer; I2 Current Transformer Secondary electric current (being generally 5A, 1A); N2 is the secondary number of turn of current transformer; Because secondary winding is made up of three coils that are equal to, so three coils are worked and the principle unanimity simultaneously,
is the monophase current table.When the three-phase primary current is that the P1 end flows to from current transformer L1, L2, L3 respectively; P2 brings out; Under the situation that secondary
is connected; By electromagnetic induction principle; Secondary winding in current transformer has electric current I 2 to flow through from 1S1,2S1,3S1; Warp
is respectively to N ', N ' ', N ' ' '; Meet
jointly and hold, form the closed-loop path.Can get electric current I1 * N1=I2 * N2 under perfect condition thus, so I1/I2=N1/N2=K is arranged, K is the no-load voltage ratio of current transformer.
Claims (6)
1. low-voltage combined type threephase current transformer; It is characterized in that said instrument transformer comprises housing (1), cover plate (2) and is arranged at the one group of secondary winding be made up of three coils (3) in the housing (1) and is arranged at four binding posts at said housing (1) top; Said three coils are respectively first coil (3-1), second coil (3-2) and tertiary coil (3-3); The secondary outlet of said first coil (3-1) is the first outlet I (1S1) and the second outlet I (N '); The secondary outlet of second coil (3-2) is the first outlet II (2S1) and the second outlet II (N ' '), and the secondary outlet of tertiary coil (3-3) is the first outlet III (3S1) and the second outlet III (N ' ' '); Said four binding posts are respectively first binding post (4), second binding post (5), the 3rd binding post (6) and the 4th binding post (7); It is 5A or 1A or milliampere little current signal of level that said current transformer goes out the standard AC signal.
2. a kind of low-voltage combined type threephase current transformer according to claim 1; It is characterized in that said housing (1) inner chamber is provided with three coil installing holes (L1, L2, L3); In respectively corresponding three coil installing hole (L1, L2, the L3) housings of packing into of first coil (3-1), second coil (3-2) and tertiary coil (3-3) (1); The first outlet I (1S1) of first coil (3-1) secondary outlet is welded on first binding post (4); The first outlet II (2S1) of second coil (3-2) secondary outlet is welded on second binding post (5); The first outlet III (3S1) of tertiary coil (3-3) secondary outlet is welded on the 3rd binding post (6); The second outlet III of the second outlet II of the second outlet I of first coil (3-1) secondary outlet (N '), the outlet of second coil (3-2) secondary (N ' '), the outlet of tertiary coil (3-3) secondary (N ' ' ') linking together jointly is ground connection, and be welded on the 4th binding post (7).
3. a kind of low-voltage combined type threephase current transformer according to claim 1 and 2 is characterized in that said housing (1) top is provided with four wiring holes (1-1) and four terminals pilot trench (1-2); Respectively with first binding post (4), second binding post (5), the 3rd binding post (6) and the 4th binding post (7) four the terminals pilot trench (1-2) of packing into.
4. a kind of low-voltage combined type threephase current transformer according to claim 1 and 2 is characterized in that said housing (1) top is provided with three reinforcement button grooves (1-4), is provided with bonding wire groove (1-5) around housing (1) is positive; Said cover plate (2) top, the back side is provided with three reinforcement buttons (2-1), is provided with bonding wire (2-2) around cover plate (2) back side; Bonding wire (2-2) around three the reinforcement buttons (2-1) at cover plate (2) top, the back side and cover plate (2) back side is respectively charged into three the reinforcement button grooves (1-4) at housing (1) top and the bonding wire groove (1-5) in housing (1) front.
5. a kind of low-voltage combined type threephase current transformer according to claim 3 is characterized in that said housing (1) top is provided with three reinforcement button grooves (1-4), is provided with bonding wire groove (1-5) around housing (1) is positive; Said cover plate (2) top, the back side is provided with three reinforcement buttons (2-1), is provided with bonding wire (2-2) around cover plate (2) back side; Bonding wire (2-2) around three the reinforcement buttons (2-1) at cover plate (2) top, the back side and cover plate (2) back side is respectively charged into three the reinforcement button grooves (1-4) at housing (1) top and the bonding wire groove (1-5) in housing (1) front.
6. a kind of low-voltage combined type threephase current transformer according to claim 1 and 2 is characterized in that said housing (1) two bottom sides is provided with two installing holes (1-3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204588739U CN202352508U (en) | 2011-11-18 | 2011-11-18 | Low-voltage combined three-phase current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204588739U CN202352508U (en) | 2011-11-18 | 2011-11-18 | Low-voltage combined three-phase current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202352508U true CN202352508U (en) | 2012-07-25 |
Family
ID=46541493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204588739U Expired - Lifetime CN202352508U (en) | 2011-11-18 | 2011-11-18 | Low-voltage combined three-phase current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202352508U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575643A (en) * | 2016-02-29 | 2016-05-11 | 济南铂晶电子科技有限公司 | Three-phase current transformer |
| CN109616305A (en) * | 2018-11-27 | 2019-04-12 | 山东航天电子技术研究所 | A kind of three-phase integrated straight-through current transformer |
| CN114512313A (en) * | 2022-02-22 | 2022-05-17 | 中山市华讯电器有限公司 | Current transformer with rated secondary current lower than 1A |
-
2011
- 2011-11-18 CN CN2011204588739U patent/CN202352508U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575643A (en) * | 2016-02-29 | 2016-05-11 | 济南铂晶电子科技有限公司 | Three-phase current transformer |
| CN109616305A (en) * | 2018-11-27 | 2019-04-12 | 山东航天电子技术研究所 | A kind of three-phase integrated straight-through current transformer |
| CN114512313A (en) * | 2022-02-22 | 2022-05-17 | 中山市华讯电器有限公司 | Current transformer with rated secondary current lower than 1A |
| CN114512313B (en) * | 2022-02-22 | 2022-10-14 | 中山市华讯电器有限公司 | Current transformer with rated secondary current lower than 1A |
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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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214405, 5 ASEAN Road, Wuxi, Jiangsu, Jiangyin Patentee after: Jiangsu Acrel Electric Equipment Manufacturing Co., Ltd. Patentee after: ACREL CO., LTD. Address before: 214405, 5 ASEAN Road, Wuxi, Jiangsu, Jiangyin Patentee before: Jiangsu Acrel Electric Equipment Manufacturing Co., Ltd. Patentee before: Shanghai Acrel Electric Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |