CN202352508U - Low-voltage combined three-phase current transformer - Google Patents

Low-voltage combined three-phase current transformer Download PDF

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Publication number
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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coil
outlet
housing
terminal
current transformer
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CN2011204588739U
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杨广亮
吴建明
汤建军
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Acrel Co Ltd
Jiangsu Acrel Electrical Manufacturing Co Ltd
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Shanghai Acrel Co Ltd
Jiangsu Acrel Electrical Manufacturing Co Ltd
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Abstract

本实用新型涉及一种低压组合式三相电流互感器，用于0.66kV及以下低压智能配电终端系统对电流信号的采集。包括壳体（1）、盖板（2）、以及设置于壳体（1）内的一组由三个线圈组成的二次绕组（3）和设置于所述壳体（1）顶部的四个接线端子，三个线圈分别为第一线圈（3-1）、第二线圈（3-2）和第三线圈（3-3），第一线圈的二次出线为第一出线Ⅰ（1S1）和第二出线Ⅰ（N’），第二线圈的二次出线为第一出线Ⅱ（2S1）和第二出线Ⅱ（N’’），第三线圈的二次出线为第一出线Ⅲ（3S1）和第二出线Ⅲ（N’’’）；所述电流互感器出标准交流信号为5A或1A或毫安级微电流信号。本实用新型具有体积小，接线比较简单，而且成本比较低，传输距离比较远等优点。

The utility model relates to a low-voltage combined three-phase current transformer, which is used for collecting current signals in a low-voltage intelligent power distribution terminal system of 0.66kV or below. It includes a casing (1), a cover plate (2), and a set of secondary windings (3) composed of three coils arranged in the casing (1) and four windings arranged on the top of the casing (1). The three coils are the first coil (3-1), the second coil (3-2) and the third coil (3-3), and the secondary outlet of the first coil is the first outlet I (1S1 ) and the second outgoing line I (N'), the secondary outgoing line of the second coil is the first outgoing line II (2S1) and the second outgoing line II (N''), the secondary outgoing line of the third coil is the first outgoing line III ( 3S1) and the second outlet III (N'''); the standard AC signal output by the current transformer is 5A or 1A or milliampere-level micro-current signal. The utility model has the advantages of small size, relatively simple wiring, relatively low cost, relatively long transmission distance and the like.

Description

The low-voltage combined type threephase current transformer
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;
Secondary winding 3, the first coil 3-1, the first outlet 1S1 and the second outlet N ', the second coil 3-2, tertiary coil 3-3;
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 (
Figure 2011204588739100002DEST_PATH_IMAGE001
) 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
Figure 904869DEST_PATH_IMAGE002
is connected; By electromagnetic induction principle; Secondary winding in current transformer has electric current I 2 to flow through from 1S1,2S1,3S1; Warp
Figure 665014DEST_PATH_IMAGE002
is respectively to N ', N ' ', N ' ' '; Meet
Figure 932047DEST_PATH_IMAGE001
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)

1.一种低压组合式三相电流互感器，其特征在于所述互感器包括壳体（1）、盖板（2）、以及设置于壳体（1）内的一组由三个线圈组成的二次绕组（3）和设置于所述壳体（1）顶部的四个接线端子，所述三个线圈分别为第一线圈（3-1）、第二线圈（3-2）和第三线圈（3-3），所述第一线圈（3-1）的二次出线为第一出线Ⅰ（1S1）和第二出线Ⅰ（N’），第二线圈（3-2）的二次出线为第一出线Ⅱ（2S1）和第二出线Ⅱ（N’’），第三线圈（3-3）的二次出线为第一出线Ⅲ（3S1）和第二出线Ⅲ（N’’’）；所述四个接线端子分别为第一接线端子（4）、第二接线端子（5）、第三接线端子（6）和第四接线端子（7）；所述电流互感器出标准交流信号为5A或1A或毫安级微电流信号。 1. A low-voltage combined three-phase current transformer, characterized in that the transformer includes a housing (1), a cover plate (2), and a set of three coils arranged in the housing (1) The secondary winding (3) and the four terminals arranged on the top of the casing (1), the three coils are the first coil (3-1), the second coil (3-2) and the Three coils (3-3), the secondary outgoing line of the first coil (3-1) is the first outgoing line I (1S1) and the second outgoing line I (N'), the second outgoing line of the second coil (3-2) The secondary outlets are the first outlet II (2S1) and the second outlet II (N''), and the secondary outlets of the third coil (3-3) are the first outlet III (3S1) and the second outlet III (N'' '); the four terminals are respectively the first terminal (4), the second terminal (5), the third terminal (6) and the fourth terminal (7); the current transformer is out of standard The AC signal is 5A or 1A or milliampere level micro current signal. 2.根据权利要求1所述的一种低压组合式三相电流互感器，其特征在于所述壳体（1）内腔设置有三个线圈安装孔（L1、L2、L3），将第一线圈（3-1）、第二线圈（3-2）和第三线圈（3-3）分别对应三个线圈安装孔（L1、L2、L3）装入壳体（1）内，第一线圈（3-1）二次出线的第一出线Ⅰ（1S1）焊接在第一接线端子（4）上，第二线圈（3-2）二次出线的第一出线Ⅱ（2S1）焊接在第二接线端子（5）上，第三线圈（3-3）二次出线的第一出线Ⅲ（3S1）焊接在第三接线端子（6）上，第一线圈（3-1）二次出线的第二出线Ⅰ（N’）、第二线圈（3-2）二次出线的第二出线Ⅱ（N’’）、第三线圈（3-3）二次出线的第二出线Ⅲ（N’’’）共同连接在一起为接地，并焊接在第四接线端子（7）。 2. A low-voltage combined three-phase current transformer according to claim 1, characterized in that three coil installation holes (L1, L2, L3) are provided in the inner cavity of the housing (1), and the first coil (3-1), the second coil (3-2) and the third coil (3-3) respectively correspond to the three coil installation holes (L1, L2, L3) into the casing (1), and the first coil ( 3-1) The first outgoing line I (1S1) of the secondary outgoing line is welded on the first terminal (4), and the first outgoing line II (2S1) of the secondary outgoing line of the second coil (3-2) is welded on the second wiring On the terminal (5), the first outlet III (3S1) of the second outlet of the third coil (3-3) is welded on the third terminal (6), and the second outlet of the second outlet of the first coil (3-1) Outlet I (N'), the second coil (3-2) the second outlet II (N''), the third coil (3-3) the second outlet III (N''') ) are connected together as ground and soldered to the fourth terminal (7). 3.根据权利要求1或2所述的一种低压组合式三相电流互感器，其特征在于所述壳体（1）顶部设置有四只接线孔（1-1）和四只接线端子槽（1-2）；分别将第一接线端子（4）、第二接线端子（5）、第三接线端子（6）和第四接线端子（7）装入四只接线端子槽（1-2）。 3. A low-voltage combined three-phase current transformer according to claim 1 or 2, characterized in that four wiring holes (1-1) and four terminal slots are arranged on the top of the housing (1) (1-2); respectively put the first terminal (4), the second terminal (5), the third terminal (6) and the fourth terminal (7) into the four terminal slots (1-2 ). 4.根据权利要求1或2所述的一种低压组合式三相电流互感器，其特征在于所述壳体（1）顶部设置有三只加强钮槽（1-4），壳体（1）正面四周设置有焊线槽（1-5）；所述盖板（2）背面顶部设置有三只加强钮（2-1），盖板（2）背面四周设置有焊线（2-2）；将盖板（2）背面顶部的三只加强钮（2-1）和盖板（2）背面四周的焊线（2-2）分别装入壳体（1）顶部的三只加强钮槽（1-4）和壳体（1）正面的焊线槽（1-5）。 4. A low-voltage combined three-phase current transformer according to claim 1 or 2, characterized in that three reinforcing button grooves (1-4) are arranged on the top of the housing (1), and the housing (1) Welding wire grooves (1-5) are arranged around the front; three reinforcing buttons (2-1) are arranged on the top of the back of the cover (2), and welding wires (2-2) are arranged around the back of the cover (2); Install the three reinforcement buttons (2-1) on the top back of the cover (2) and the welding wires (2-2) around the back of the cover (2) respectively into the three reinforcement button grooves on the top of the housing (1) ( 1-4) and the wire groove (1-5) on the front of the housing (1). 5.根据权利要求3所述的一种低压组合式三相电流互感器，其特征在于所述壳体（1）顶部设置有三只加强钮槽（1-4），壳体（1）正面四周设置有焊线槽（1-5）；所述盖板（2）背面顶部设置有三只加强钮（2-1），盖板（2）背面四周设置有焊线（2-2）；将盖板（2）背面顶部的三只加强钮（2-1）和盖板（2）背面四周的焊线（2-2）分别装入壳体（1）顶部的三只加强钮槽（1-4）和壳体（1）正面的焊线槽（1-5）。 5. A low-voltage combined three-phase current transformer according to claim 3, characterized in that the top of the housing (1) is provided with three reinforcing button slots (1-4), and the front of the housing (1) is surrounded by Welding wire slots (1-5) are provided; three reinforcing buttons (2-1) are arranged on the top of the back of the cover (2), and welding wires (2-2) are arranged around the back of the cover (2); The three reinforcing buttons (2-1) on the top of the back of the board (2) and the welding wires (2-2) around the back of the cover (2) are respectively installed in the three reinforcing button grooves (1- 4) and the wire groove (1-5) on the front of the housing (1). 6.根据权利要求1或2所述的一种低压组合式三相电流互感器，其特征在于所述壳体（1）底部两侧设置有两只安装孔（1-3）。 6. A low-voltage combined three-phase current transformer according to claim 1 or 2, characterized in that two mounting holes (1-3) are provided on both sides of the bottom of the housing (1).
CN2011204588739U 2011-11-18 2011-11-18 Low-voltage combined three-phase current transformer Expired - Lifetime CN202352508U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
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 three-phase integrated core-type current transformer
CN114512313A (en) * 2022-02-22 2022-05-17 中山市华讯电器有限公司 A current transformer with rated secondary current less than 1A

Cited By (4)

* Cited by examiner, † Cited by third party
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 three-phase integrated core-type current transformer
CN114512313A (en) * 2022-02-22 2022-05-17 中山市华讯电器有限公司 A current transformer with rated secondary current less 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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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
CX01 Expiry of patent term

Granted publication date: 20120725