Circuit breaker with mutual inductor module

Abstract

The utility model discloses a circuit breaker with a mutual inductor module. The circuit breaker is characterized in that a body is provided with an accommodating cavity; the conductive part is accommodated in the accommodating cavity; the mutual inductor module is contained in the containing cavity, the mutual inductor module comprises a shell and a current transformer, the shell is provided with a cavity and a through hole, and the current transformer is contained in the cavity; the conductive piece passes through the through hole, and the current transformer is fixedly connected with the accommodating cavity; the plurality of current transformers are accommodated in the shell to form modular installation, and then the conductive pieces penetrate through the through holes and the current transformers, so that the detection effect is realized; and meanwhile, the conductive piece is also matched with the wiring terminal, so that the fixing effect of the mutual inductor module is further realized.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a circuit breaker with a mutual inductor module. Background Art

[0002] The circuit breaker, specifically the molded case circuit breaker, has a current transformer installed inside the molded case circuit breaker. Usually, one current transformer is provided for each phase circuit. For example, a three-phase molded case circuit breaker is provided with three current transformers, and each current transformer is provided independently of each other, which results in the need to install them one by one during the installation process. However, the development trend of the existing molded case circuit breakers tends to be intelligent and modular. Therefore, how to realize the modularization of the transformer has become a technical problem that technicians in this field continue to solve. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is how to realize the modularization of a transformer. To this end, a circuit breaker with a transformer module comprises:

[0004] A body, wherein the body is provided with a receiving cavity;

[0005] A conductive member, the conductive member is accommodated in the accommodating cavity;

[0006] A transformer module, the transformer module is accommodated in the accommodating cavity, the transformer module comprises a shell and a current transformer, the shell is provided with a cavity and a through hole, and the current transformer is accommodated in the cavity;

[0007] The conductive member passes through the through hole, and the current transformer is connected and fixed to the accommodating cavity.

[0008] The transformer module includes a circuit board, which is accommodated above the chamber. The current transformer is provided with a first pin, which is connected to the circuit board.

[0009] The circuit board is fixed with a plurality of pins, and the inner wall of the chamber is provided with fixing grooves matched with the pins.

[0010] The housing is provided with a supporting groove, the circuit board is provided with an extending portion, the extending portion extends to the supporting groove, and a socket is fixed to the extending portion.

[0011] The transformer module further includes a zero-sequence transformer, which is accommodated in the chamber, and the conductive member passes through the zero-sequence transformer.

[0012] The shell is provided with a guide column, the through hole passes through the guide column, the guide column is arranged corresponding to the current transformer, the guide column passes through the zero-sequence transformer, and the current transformer cooperates with the inner wall of the chamber.

[0013] A partition plate is provided on the inner wall of the chamber, and the partition plate is located on the upper side or the lower side or both upper and lower sides of the guide column, and the zero-sequence mutual inductor is sleeved on the partition plate.

[0014] The shell includes a first component and a second component, and the first component and the second component are spliced ​​to form the chamber.

[0015] The current transformer has a metering function.

[0016] The technical solution of the utility model has the following advantages:

[0017] 1. The utility model provides a circuit breaker with a transformer module, wherein a plurality of current transformers are accommodated in a housing to form a modular installation, and then a conductive member is passed through a through hole and a current transformer to achieve a detection effect. At the same time, the conductive member also cooperates with a wiring terminal to further achieve a fixing effect of the transformer module.

[0018] 2. The utility model provides a circuit breaker with a current transformer module, in which the current transformer and the housing are fixed by a circuit board, and the first pin and the circuit board are fixed by soldering, so that the two are firmly fixed to the housing. In addition, the current transformer can also be connected and fixed to the housing by means of snaps, interference fit, or bolts.

[0019] 3. The utility model provides a circuit breaker with a mutual inductor module, wherein the pin and the fixing slot cooperate to form a positioning fixation. At the same time, two adjacent fixing slots are arranged at intervals, forming an insulation protection effect to prevent creepage.

[0020] 4. The utility model provides a circuit breaker with a transformer module, wherein the support groove plays a supporting and fixing effect. The support groove cooperates with the extension portion to achieve a fixing effect of the circuit board, so that the circuit board is fixed in the upper area of ​​the entire shell. Secondly, the presence of the socket causes an insertion force to be generated during operation. At this time, the setting of the support groove increases the strength of the circuit board and prevents the insertion force from damaging the circuit board.

[0021] 5. The utility model provides a circuit breaker with a transformer module. The setting of the zero-sequence transformer further increases the detection effect. Here, the zero-sequence transformer and the current transformer are set in parallel.

[0022] 6. The utility model provides a circuit breaker with a transformer module. The setting of the guide column forms a guiding effect for the conductive part, and also forms an insulation protection effect, so that an isolation is formed between the conductive part and the current transformer and the zero-sequence transformer.

[0023] 7. The utility model provides a circuit breaker with a transformer module, wherein the partition plate forms a coordination effect with the zero-sequence transformer.

[0024] 8. The utility model provides a circuit breaker with a mutual inductor module. The arrangement of two components makes processing more convenient and reduces processing difficulty.

[0025] 9. The utility model provides a circuit breaker with a transformer module, in which both ends of the conductive member are connected and fixed, thereby further improving the fixing effect of the entire transformer module and preventing shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A cross-sectional view of a circuit breaker with a transformer module provided by the utility model;

[0028] Figure 2 An exploded diagram of a circuit breaker with a transformer module provided by the utility model;

[0029] Figure 3 A schematic diagram of the structure of the transformer module provided by the utility model;

[0030] Figure 4 An exploded diagram of the transformer module provided by the utility model;

[0031] Figure 5 A schematic diagram of the structure of the transformer module provided by the utility model;

[0032] Figure 6 A schematic diagram of the structure of the transformer module provided by the utility model;

[0033] Figure 7 This is a structural schematic diagram of the mutual inductor module provided by the utility model.

[0034] Description of reference numerals:

[0035] 11. Main body; 12. Conductive part; 13. Transformer module; 14. Shell; 15. Current transformer; 16. Circuit board; 17. Zero-sequence transformer; 18. First component; 19. Second component; 111. Accommodating cavity; 141. Chamber; 142. Through hole; 143. Fixing groove; 144. Supporting groove; 145. Guide column; 146. Partition plate; 151. First pin; 161. Pin; 162. Extension; 163. Socket. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0040] Example 1

[0041] This embodiment provides a circuit breaker with a transformer module, as shown in the attached Figure 1-7 As shown, including:

[0042] The main body 11 is provided with a receiving chamber 111, and the receiving chamber 111 accommodates a moving contact, a static contact, an arc extinguishing assembly, an operating mechanism, etc. This is the prior art, so it will not be described in detail in this embodiment.

[0043] Conductive member 12 is accommodated in the accommodating cavity 111. Conductive member 12 is part of the main circuit of the molded case circuit breaker. Through detection, it is determined whether the entire electrical circuit has a fault. Conductive member 12 can be electrically connected to the static contact, conductive member 12 can also be electrically connected to the moving contact, and conductive member 12 can also be electrically connected to an external wire through a terminal. Conductive member 12 can be linear, such as a wire with an insulating layer or a copper braided wire; conductive member 12 can also be a conductive bar structure, such as a copper bar, etc. The number of conductive members 12 can be adjusted according to actual needs. In this embodiment, the number of conductive members 12 is three, for example, that is, three-phase electricity.

[0044] The transformer module 13 is accommodated in the accommodating chamber 111. The transformer module 13 is an integral module, which is accommodated in the accommodating chamber 111 to form a connection and fixing effect. The transformer module 13 can achieve a connection and fixing effect between the transformer module 13 and the accommodating chamber 111 by bolts, snaps or other fixing methods. The transformer module 13 includes a shell 14 and a current transformer 15. The shell 14 is provided with a chamber 141 and a through hole 142. The through hole 142 is connected to the chamber 141. In this embodiment, the through hole 142 runs through the entire shell 14 from left to right. The number of through holes 142 is consistent with the number of current transformers 15. The current transformer 15 is accommodated in the chamber 141. In this embodiment, the number of current transformers 15 is three, the structures of the three current transformers 15 are the same, and the three current transformers 15 are evenly spaced and distributed in the chamber 141.

[0045] The conductive part 12 passes through the through hole 142, and the current transformer 15 is connected and fixed to the accommodating cavity 111. It should be noted here that the two ends of the conductive part 12 are located outside the transformer module 13. The conductive part 12 and the accommodating cavity 111 are connected and fixed. The connection and fixing method here can be bolt fixing, so that the conductive part 12 is firmly fixed. This fixing method increases the connection and fixing effect between the entire transformer module 13 and the accommodating cavity 111, forming multiple fixations; or the transformer module 13 is only fixed to the accommodating cavity 111 through the conductive part 12. A plurality of current transformers 15 are accommodated in the housing 14 to form a modular installation, and then the conductive part 12 passes through the through hole 142 and the current transformer 15, so as to achieve the detection effect. At the same time, the conductive part 12 also cooperates with the terminal block to further achieve the fixing effect of the transformer module 13.

[0046] Specifically, as attached Figure 4As shown, the transformer module 13 includes a circuit board 16, and the circuit board 16 is accommodated above the chamber 141. In simple terms, the circuit board 16 is located in the upper area of ​​the entire transformer module 13. It should be noted that when the circuit board 16 is installed and fixed to the housing 14, the circuit board 16 will not fall below the chamber 141. The current transformer 15 is provided with a first pin 151, where the first pin 151 is electrically connected to the circuit board 16, that is, the first pin 151 is inserted into the pad of the circuit board 16, and then fixed by soldering, thereby forming an electrical connection between the current transformer 15 and the circuit board 16 and a fixed connection effect. In this embodiment, one circuit board 16 is respectively matched with three current transformers 15 to form a connection and fixation. This circuit board 16 can be matched with the controller module 20 to form a signal transmission. The fixation between the current transformer 15 and the housing 14 is formed by the circuit board 16. Here, after the first pin 151 is fixed with the circuit board 16 by soldering, the two are firmly fixed to the housing 14. In addition, the current transformer 15 can also be connected and fixed to the housing 14 by means of snap-fit, interference fit, or bolt connection.

[0047] Specifically, as attached Figure 4 As shown, the circuit board 16 is fixed with a plurality of pins 161, and the inner wall of the chamber 141 is provided with a fixing groove 143 that matches the pins 161. The pins 161 are partially accommodated in the fixing groove 143 to form a positioning fixation. At the same time, the intervals between two adjacent fixing grooves 143 form an insulation protection effect to prevent creepage. The number of pins 161 here can be adjusted according to actual needs, and multiple pins 161 can be combined to form a multi-pin structure.

[0048] Specifically, as attached Figure 3-7 As shown, the housing 14 is provided with a support groove 144, and the support groove 144 cooperates with the structure of the accommodating cavity 111 to form a supporting effect. In this embodiment, the number of the support grooves 144 is two. The circuit board 16 is provided with an extension portion 162, and the number of the extension portions 162 here is also two. The extension portion 162 extends to the support groove 144, and the extension portion 162 is fixed with a socket 163. The support groove 144 plays a supporting and fixing effect. The support groove 144 cooperates with the extension portion 162 to achieve the fixing effect of the circuit board 16, so that the circuit board 16 is fixed in the upper area of ​​the entire housing 14. Secondly, the existence of the socket 163 causes an insertion force to be generated during operation. At this time, the setting of the support groove 144 increases the strength of the circuit board 16 and prevents the insertion force from damaging the circuit board 16. In this embodiment, the socket 163 is used to cooperate with the controller module 20 to form a signal transmission effect.

[0049] Specifically, as attached Figure 3-5As shown, the transformer module 13 also includes a zero-sequence transformer 17, which is accommodated in the chamber 141, and the conductive member 12 passes through the zero-sequence transformer 17. The arrangement of the zero-sequence transformer 17 further increases the detection effect, where the zero-sequence transformer 17 and the current transformer 15 are arranged in parallel. It should be noted that, in this embodiment, the three conductive members 12 all pass through the zero-sequence transformer 17. In addition, the transformer module 13 may not be equipped with the zero-sequence transformer 17. In this embodiment, the zero-sequence transformer 17 is a ring structure.

[0050] Specifically, as attached Figure 3-5 As shown, the housing 14 is provided with a guide post 145, which extends horizontally and is specifically located on the inner wall of the chamber 141. In this embodiment, the number of guide posts 145 is also three. The three guide posts 145 are distributed at equal intervals. The through hole 142 passes through the guide post 145, and the guide post 145 is arranged corresponding to the current transformer 15. The guide post 145 passes through the zero-sequence transformer 17, the current transformer 15 and the inner wall of the chamber 141, and the guide post 145 can eventually be offset against the inner wall of the chamber 141 on the other side, or can be arranged with a gap. The setting of the guide post 145 forms a guiding effect for the conductive member 12. At this time, the conductive member 12 passes through the through hole 142, and part of the conductive member 12 is located in the guide post 145, forming an insulation protection effect, so that an isolation is formed between the conductive member 12 and the current transformer 15 and the zero-sequence transformer 17.

[0051] Specifically, as attached Figure 3-5 As shown, a partition plate 146 is provided on the inner wall of the chamber 141. The partition plate 146 is located on the upper side or the lower side or both upper and lower sides of the guide post 145. The guide post 145 is located on the left inner wall of the chamber 141, and the partition plate 146 is located on the upper side of the guide post 145, or the partition plate 146 is located on the lower side of the guide post 145, or the number of the partition plates 146 is two, which are respectively arranged on the upper and lower sides of the guide post 145. In this embodiment, the partition plate 146 is used for pre-positioning and fixing of the zero-sequence mutual inductor 17, that is, the zero-sequence mutual inductor 17 is sleeved on the partition plate 146 to form a positioning and fixing effect. The partition plate 146 forms a matching effect with the zero-sequence mutual inductor 17. In this embodiment, the partition plate 146 can be located on the same side of the inner wall of the chamber 141 as the guide post 145, the partition plate 146 can also be located on the opposite side of the inner wall of the chamber 141, and parts can also be provided on the left and right inner walls of the chamber 141, and the entire partition plate 146 is formed after splicing.

[0052] Specifically, the housing 14 includes a first component 18 and a second component 19, and the first component 18 and the second component 19 are spliced ​​to form a chamber 141. The arrangement of the two components makes processing more convenient and reduces the difficulty of processing. Here, the splicing method of the first component 18 and the second component 19 can be a snap connection, a bolt connection, or ultrasonic welding, etc. In this embodiment, the guide column 145 is located on the side of the first component 18 facing the second component 19. When the first component 18 and the second component 19 are matched, the guide column 145 fits with the second component 19.

[0053] Specifically, the current transformer 15 has a metering function, that is, the metering and current detection are integrated into one structure. The current transformer 15 may not have a metering function, but only be a basic current detection. In addition, the transformer module 13 may not be equipped with a zero-sequence transformer 17. Therefore, four groups of functions are formed.

[0054] As attached Figure 7 The transformer module 13 shown in the figure has a basic current transformer 15 inside, which only has a current detection function. Meanwhile, the transformer module 13 is not equipped with a zero-sequence transformer 17, so it only has a current detection function.

[0055] As attached Figure 5 The current transformer 15 in the transformer module 13 shown in the figure is also a basic model and only has a current detection function. Meanwhile, a zero-sequence transformer 17 is installed in the transformer module 13, so it has the functions of current detection and zero-sequence transformer detection.

[0056] As attached Figure 6 In the transformer module 13 shown in the figure, the current transformer 15 inside it has a metering function, that is, the metering and current detection are integrated. At the same time, the transformer module 13 is not equipped with a zero-sequence transformer 17, so it has the functions of current detection and metering.

[0057] As attached Figure 3-4 The transformer module 13 shown in the figure has a current transformer 15 inside which has a metering function, that is, metering and current detection are integrated. At the same time, a zero-sequence transformer 17 is installed in the transformer module 13, so it has the functions of current detection, metering and zero-sequence transformer detection.

[0058] Specifically, as attached Figure 1-2 As shown, the two ends of the conductive member 12 are connected and fixed, which further improves the fixing effect of the entire transformer module 13 and prevents shaking. In this embodiment, one end of the conductive member 12 cooperates with the moving contact assembly, and the bolt passes through the moving contact assembly to connect and fix with the conductive member 12, and the other end of the conductive member 12 passes through the through hole 142 and extends toward the outside of the body 11, specifically extending to the position of the wiring terminal, and then passes through the conductive member 12 through the bolt to connect with the bottom surface of the accommodating cavity 111.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A circuit breaker with a transformer module, characterized in that: include: A body (11), wherein the body (11) is provided with a receiving cavity (111); A conductive member (12), the conductive member (12) being accommodated in the accommodating cavity (111); A transformer module (13), the transformer module (13) being accommodated in the accommodating cavity (111), the transformer module (13) comprising a housing (14) and a current transformer (15), the housing (14) being provided with a chamber (141) and a through hole (142), the current transformer (15) being accommodated in the chamber (141); The conductive member (12) passes through the through hole (142), and the current transformer (15) is connected and fixed to the accommodating cavity (111).

2. The circuit breaker with a transformer module according to claim 1, characterized in that: The transformer module (13) comprises a circuit board (16), wherein the circuit board (16) is accommodated above the chamber (141), and the current transformer (15) is provided with a first pin (151), wherein the first pin (151) is connected to the circuit board (16).

3. The circuit breaker with a transformer module according to claim 2, characterized in that: The circuit board (16) is fixed with a plurality of plug pins (161), and the inner wall of the chamber (141) is provided with a fixing groove (143) matching with the plug pins (161).

4. The circuit breaker with a transformer module according to claim 2 or 3, characterized in that: The housing (14) is provided with a supporting groove (144), the circuit board (16) is provided with an extending portion (162), the extending portion (162) extends to the supporting groove (144), and a socket (163) is fixed to the extending portion (162).

5. The circuit breaker with a transformer module according to claim 1, characterized in that: The transformer module (13) further comprises a zero-sequence transformer (17), wherein the zero-sequence transformer (17) is accommodated in the chamber (141), and the conductive member (12) passes through the zero-sequence transformer (17).

6. The circuit breaker with a transformer module according to claim 5, characterized in that: The shell (14) is provided with a guide column (145), the through hole (142) passes through the guide column (145), the guide column (145) is arranged corresponding to the current transformer (15), the guide column (145) passes through the zero-sequence transformer (17), and the current transformer (15) cooperates with the inner wall of the chamber (141).

7. The circuit breaker with a transformer module according to claim 6, characterized in that: The inner wall of the chamber (141) is provided with a partition plate (146), and the partition plate (146) is located on the upper side or the lower side or both upper and lower sides of the guide column (145), and the zero-sequence mutual inductor (17) is sleeved on the partition plate (146).

8. The circuit breaker with a transformer module according to claim 1, characterized in that: The housing (14) comprises a first component (18) and a second component (19), and the first component (18) and the second component (19) are spliced ​​to form the chamber (141).

9. The circuit breaker with a transformer module according to claim 1, 2 or 6, characterized in that: The current transformer (15) has a metering function.

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