Multi-pole one-phase mutual inductor mounting structure of circuit breaker
By integrating all phase transformers onto a single circuit board, the complexity of wiring in low-voltage circuit breakers is reduced, improving assembly efficiency and reducing the risk of damage.
Patent Information
- Application Number
- CN202421956976.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In existing low-voltage circuit breakers, the installation structure of the transformer leads to complex wire connections, low assembly efficiency, and easy to cause product failure.
The transformers of all poles in phase are integrated into a circuit board and connected to the controller through the lead wire boss and the bottom plate to reduce the wire connection. The integrated transformer structure is adopted, and the moving busbar and the moving busbar are installed through the hole.
Simplifies wire connection, improves assembly efficiency and reduces product failure risk.
Smart Images
Figure CN223108797U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of low-voltage electrical appliances, and specifically relates to a multi-pole one-phase current transformer installation structure of a circuit breaker. Background Art
[0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scope. Low-voltage circuit breakers, also known as automatic switches, commonly known as "air switches", also refer to low-voltage circuit breakers. It is an electrical appliance that has the function of a manual switch and can automatically perform undervoltage, overvoltage, overload, and short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they have serious overload, short-circuit, and undervoltage faults, it can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-thermal relay, etc. Moreover, generally no parts need to be changed after breaking the fault current, and it has been widely used. In the prior art, for a two-pole one-phase universal circuit breaker with a large current frame, each pole current transformer is independently installed at each pole position. The lead wire of the current transformer is led out to the front of the product through the base, and the current transformers of all poles of the same phase are integrated into a circuit board, and then output to the controller. The whole assembly wire harness is numerous, and it is cumbersome to arrange the wires. Moreover, it is necessary to avoid crushing the wires during the assembly of other parts such as the mechanism, resulting in product failures. Summary of the Utility Model
[0003] The purpose of the utility model is to address the defects of the existing current transformer installation, and provide a circuit breaker current transformer installation structure. The current transformers of all poles of the same phase are integrated into a circuit board and then directly output to the controller, reducing the connecting wires, simplifying the wire arrangement, and improving the assembly efficiency.
[0004] Technical Solution
[0005] To achieve the above technical purpose, the utility model provides a multi-pole one-phase current transformer installation structure of a circuit breaker, which is characterized in that: the current transformers of all poles of the same phase are integrated. A circuit board is provided in the housing of the integrated current transformer, and the inside of the current transformer is integrated through the circuit board. A lead-out boss is provided on the housing of the current transformer, and a lead-out wire groove is provided on the lead-out boss. The lead wire comes out from the lead-out wire groove and is connected to the controller through the bottom plate and the base. A current transformer installation groove matching the current transformer is provided on the bottom plate, and the moving busbar is arranged in the current transformer installation groove. A moving busbar through hole corresponding to the moving busbar is provided on the current transformer, and the current transformer is fixedly installed in the current transformer installation groove, and the moving busbar is sleeved and installed with the moving busbar through hole.
[0006] In one of the embodiments, when the integrated current transformer is a two-pole one-phase current transformer, the circuit board is located in the housing space between the current transformers of two adjacent poles in the integrated current transformer.
[0007] In one embodiment, when the integrated mutual inductor is a three - pole single - phase mutual inductor, the circuit board is located in any one of the housing spaces between the adjacent two poles of the integrated mutual inductor within the housing space.
[0008] In one embodiment, the lead - out boss is located on the outer surface of the bottom of the housing between the adjacent two poles of the integrated mutual inductor.
[0009] In one embodiment, the integrated mutual inductor is mounted in the mutual - inductor mounting groove on the bottom plate by screws.
[0010] In one embodiment, a connecting projection one and a connecting projection two are respectively arranged on the upper - end side and the lower - end side of the integrated mutual inductor for fixing and mounting the integrated mutual inductor in the mutual - inductor mounting groove by screws.
[0011] In one embodiment, a buffer pad is installed between the integrated mutual inductor and the bottom surface of the mutual - inductor mounting groove.
[0012] Beneficial effects
[0013] For the multi - pole single - phase mutual - inductor installation structure of the circuit breaker provided by the present utility model, the mutual inductors of all poles in the same phase are integrated. A circuit board is provided in the housing of the integrated mutual inductor, and the interior of the mutual inductor is integrated through the circuit board. A lead - out boss is provided on the housing of the mutual inductor, and a lead - out wire groove is provided on the lead - out boss. After the lead wire comes out from the lead - out wire groove, it is connected to the controller through the bottom plate and the base. A mutual - inductor mounting groove matching the mutual inductor is provided on the bottom plate, and the moving bus bar is arranged in the mutual - inductor mounting groove. A moving - bus - bar through - hole corresponding to the moving bus bar is provided on the mutual inductor, and the mutual inductor is fixedly installed in the mutual - inductor mounting groove, and the moving bus bar is sleeved and installed with the moving - bus - bar through - hole. Integrating the mutual inductors of all poles in the same phase into one circuit board and then directly outputting to the controller reduces the connecting wires, simplifies the wire arrangement, and improves the assembly efficiency. Brief description of the drawings
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0015] Att Figure 1 is a schematic diagram of the installation position of the integrated mutual inductor in the embodiment of the present utility model;
[0016] Att Figure 2 is a schematic diagram of the installation structure of the integrated mutual inductor in the embodiment of the present utility model Figure 1;
[0017] Attached Figure 3 is a schematic diagram of the installation structure of the integrated current transformer in the embodiment of the present utility model; Figure 2 ;
[0018] Attached Figure 4 is a schematic diagram of the installation of the integrated circuit board in the embodiment of the present utility model;
[0019] Attached Figure 5 is a schematic diagram of the installation of the buffer pad in the embodiment of the present utility model; Detailed implementation manners
[0020] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.
[0021] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.
[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0023] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first feature is in direct contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.
[0024] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.
[0025] Embodiment
[0026] In the prior art, for a large-current frame two-pole one-phase universal circuit breaker, each pole of the current transformer is independently installed at each pole position. The lead wires of the current transformer are led out through the base to the front of the product, and the current transformers of all poles of the same phase are integrated into a circuit board, and then output to the controller. The entire assembly has many wiring harnesses, and it is cumbersome to arrange the wires. Also, it is necessary to avoid crushing the wires when assembling other parts such as the mechanism, resulting in product failures.
[0027] To solve this problem, as shown in the appendix Figure 1 This embodiment provides a multi-pole one-phase current transformer installation structure for a circuit breaker. The current transformers a of all poles of the same phase are integrated. In this embodiment, the integrated current transformer a is preferably a two-pole one-phase current transformer. As shown in the appendix Figure 4 This embodiment provides a multi-pole one-phase current transformer installation structure for a circuit breaker. The current transformers a of all poles of the same phase are integrated. In this embodiment, the integrated current transformer a is preferably a two-pole one-phase current transformer. As shown, a circuit board b is provided in the housing a01 of the integrated current transformer a, and the circuit board b is located in the space of the housing a01 between the current transformers of two adjacent poles in the integrated current transformer a. The current transformer a is integrated internally through the circuit board b. As shown in the appendix Figure 2 and 3 This embodiment provides a multi-pole one-phase current transformer installation structure for a circuit breaker. The current transformers a of all poles of the same phase are integrated. In this embodiment, the integrated current transformer a is preferably a two-pole one-phase current transformer. As shown, an outgoing lead boss a0102 is provided on the housing a01 of the current transformer a, and an outgoing lead groove a0102a is provided on the outgoing lead boss a0102. After the lead wire comes out from the outgoing lead groove a0102a, it is connected to the controller through the bottom plate c and the base d. A current transformer installation groove c01 matching the current transformer a is provided on the bottom plate c. A moving bus bar e is arranged in the current transformer installation groove c01. A moving bus bar through hole a02 corresponding to the moving bus bar e is provided on the current transformer a. The current transformer a is fixedly installed in the current transformer installation groove c01. In this embodiment, the integrated current transformer a is locked in the current transformer installation groove c01 on the bottom plate c by a screw f. The moving bus bar e and the moving bus bar through hole a02 are sleeved and installed. Among them, the outgoing lead boss a0102 is located on the outer surface of the bottom of the housing a01 between the current transformers of two adjacent poles in the integrated current transformer a. Connecting protrusions one a03 and connecting protrusions two a04 are respectively provided on the upper end side and the lower end side of the integrated current transformer a for fixing and installing the integrated current transformer a in the current transformer installation groove c01 by the screw f.
[0028] As shown in the appendix Figure 5As shown in the figure, in order to reduce the friction between the transformer a and the bottom surface of the transformer installation groove c01, a buffer pad g is installed between the integral transformer a and the bottom surface of the transformer installation groove c01.
[0029] Embodiment 2
[0030] In this embodiment, when the integral transformer a is a three-pole single-phase transformer, the circuit board b is located in any one of the housing a01 spaces in the housing a01 space between the transformers of two adjacent poles in the integral transformer a. Other structures are the same as those in Embodiment 1.
[0031] The multi-pole single-phase transformer installation structure of the circuit breaker provided by the present utility model integrates the transformers of all poles of the same phase into one circuit board and then directly outputs to the controller, reducing the connecting wires, simplifying the wire arrangement, and improving the assembly efficiency.
[0032] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.
[0033] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.
Claims
1. A multi-pole and single-phase current transformer installation structure for a circuit breaker, characterized in that : The transformer (a) with all in-phase poles is integrated. A circuit board (b) is provided in the housing (a01) of the integrated transformer (a). The inside of the transformer (a) is integrated through the circuit board (b). An outlet lead boss (a0102) is provided on the housing (a01) of the transformer (a). An outlet lead groove (a0102a) is provided on the outlet lead boss (a0102). After the lead wire comes out from the outlet lead groove (a0102a), it is connected to the controller through the bottom plate (c) and the base (d). A transformer installation groove (c01) matching the transformer (a) is provided on the bottom plate (c). The moving busbar (e) is arranged in the transformer installation groove (c01). A moving busbar through hole (a02) corresponding to the moving busbar (e) is provided on the transformer (a). The transformer (a) is fixedly installed in the transformer installation groove (c01), and the moving busbar (e) is sleeved and installed with the moving busbar through hole (a02).
2. The multi-pole one-phase mutual inductor installation structure of a circuit breaker according to claim 1, characterized in that : When the integrated transformer (a) is a bipolar single-phase transformer, the circuit board (b) is located in the space of the housing (a01) between the transformers of two adjacent poles in the integrated transformer (a).
3. The installation structure of a multi-pole one-phase mutual inductor of a circuit breaker according to claim 1, characterized in that : When the integrated transformer (a) is a tripolar single-phase transformer, the circuit board (b) is located in any one of the spaces of the housing (a01) between the transformers of two adjacent poles in the integrated transformer (a).
4. The multi-pole and single-phase current transformer mounting structure of a circuit breaker according to claim 1, characterized in that : The outlet lead boss (a0102) is located on the outer surface of the bottom of the housing (a01) between the transformers of two adjacent poles in the integrated transformer (a).
5. The installation structure of a multi-pole one-phase mutual inductor of a circuit breaker according to claim 1, characterized in that : The integrated transformer (a) is locked and installed in the transformer installation groove (c01) on the bottom plate (c) by screws (f).
6. The multi-pole one-phase mutual inductor installation structure of a circuit breaker according to claim 4, characterized in that : Connecting protrusion one (a03) and connecting protrusion two (a04) are respectively provided on the upper end side and the lower end side of the integrated transformer (a) for fixing and installing the integrated transformer (a) in the transformer installation groove (c01) by screws (f).
7. The installation structure of a multi-pole and one-phase mutual inductor of a circuit breaker according to claim 1, characterized in that : A buffer pad (g) is installed between the integrated transformer (a) and the bottom surface of the transformer installation groove (c01).