A high-breaking large-current small-size intelligent circuit breaker

Abstract

A high breaking large current small volume intelligent circuit breaker, comprising a shell with a width of 18 mm, the shell comprising a middle shell and side covers arranged on both sides of the middle shell, the middle shell and the side covers on both sides forming a first space and a second space for placing a circuit board respectively, the second space being partially recessed towards the first space to form a third space for accommodating a transmission assembly, both ends of the first space being provided as fourth spaces for accommodating a wiring assembly, between the two fourth spaces being sequentially arranged a fifth space for accommodating an electromagnetic assembly, a sixth space for accommodating an arc extinguishing assembly and a seventh space for accommodating an operating assembly, wherein the fifth space and the sixth space are arranged along the height direction of the shell, and the heights of the fifth space and the sixth space are consistent with the available height inside the shell, and the fifth space, the seventh space and the third space are sequentially arranged along the length direction of the shell. The overall structure is rearranged by staggered arrangement of the middle shell on both sides, realizing compatibility of large current and high breaking, and improving the overall performance and market competitiveness of the product.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to a high breaking capacity, large current, and small size intelligent circuit breaker. Background Technology

[0002] A standard 1P circuit breaker is typically 18 mm thick. This thickness limitation results in a compact internal space allocation. However, with economic development, miniaturization and intelligence are becoming increasingly important. IoT circuit breakers, in particular, require additional electronic control modules, motor assemblies, and gear transmission systems within the 18 mm thick casing, further complicating the internal space. Consequently, existing products often struggle to handle high currents (63A) and high breaking capacity (10kA). Two main types of products are available on the market:

[0003] 1. The electromagnetic system adopts a snap-fit ​​structure. The advantage is that the helical coil is replaced by a magnetic plate, which can reduce the internal installation space. However, because the short-circuit breaking time of the snap-fit ​​structure is relatively long, the breaking capacity is reduced (generally 4.5-6kA).

[0004] 2. Reduce the current rating of the product's casing (generally to 32-40A). The advantage is that it reduces the cross-sectional area of ​​the spiral coil, thereby reducing the installation space required. The disadvantage is that the installation scenarios (for lines above 40kA) are limited. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a high breaking capacity, large current, and small size intelligent circuit breaker.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A high-breaking-capacity, high-current, small-volume intelligent circuit breaker includes a housing with a certain width. The housing includes a middle housing and side covers disposed on both sides of the middle housing. A first space and a second space for placing a circuit board are respectively formed between the middle housing and the side covers.

[0008] The second space portion is recessed towards the first space to form a third space for accommodating the transmission components.

[0009] The first space is divided into two fourth spaces at its two ends for accommodating wiring components. Between the two fourth spaces, there are sequentially arranged a fifth space for accommodating electromagnetic components, a sixth space for accommodating arc-extinguishing components, and a seventh space for accommodating operating components.

[0010] The fifth and sixth spaces are arranged along the height of the shell, and their combined height is consistent with the usable height inside the shell. The fifth, seventh, and third spaces are arranged sequentially along the length of the shell.

[0011] The sixth space is equipped with an arc-extinguishing chamber containing 15 arc-extinguishing plates.

[0012] A reserved space is also provided between the seventh space and the third space.

[0013] A current transformer is installed in the reserved space, and the current transformer is electrically connected to the circuit board located in the second space through a small hole.

[0014] The reserved space is equipped with a manganese copper resistor, and the manganese copper resistor is electrically connected to the circuit board located in the second space through a small hole.

[0015] The reserved space has a slot at the bottom for installing a manganese copper resistor.

[0016] The first and second spaces occupy the width direction of the shell.

[0017] The second and third spaces occupy the width direction of the housing.

[0018] The width of the housing is 18mm.

[0019] The beneficial effects of this utility model are: by reorganizing the overall structure through the staggered arrangement of the two sides of the middle shell, it achieves simultaneous compatibility with high current and high breaking capacity, thereby improving the overall performance and market competitiveness of the product. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is an exploded view of the present invention.

[0022] Figure 3 This is a schematic diagram of the structure within the second space of this utility model.

[0023] Figure 4 This is a schematic diagram of the division of the first space in this utility model.

[0024] Figure 5 This is a schematic diagram of the layout within the first space of this utility model.

[0025] Figure 6 This is a schematic diagram of the third space of this utility model.

[0026] Figure 7 This is a schematic diagram of the layout within the third space of this utility model.

[0027] Figure 8 This is a simplified diagram showing the division of the first, second, and third spaces in this utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, this utility model discloses a high-breaking-capacity, high-current, small-volume intelligent circuit breaker, which includes a housing 100 and related components disposed within the housing, such as a wiring assembly 200, an electromagnetic assembly 300, an operating assembly 500, an arc-extinguishing assembly 400, and a transmission assembly 700. A rotatable handle is also provided within the housing; one side of the handle is linked to the transmission assembly, and the other side is linked to the operating assembly. The housing has a certain width Y, length X, and height Z, as shown below. Figure 1 The coordinate axis is shown in the middle, where the width Y is 18mm, while it is 0.75 inches in European standard.

[0031] like Figure 2 As shown, the housing 100 consists of a middle housing 110 and two side covers 120. The middle housing and the two side covers respectively form a first space 9000 and a second space 8000. The second space 8000 is mainly used to house circuit boards, such as... Figure 8As shown, the width of the second space is much smaller than the width of the first space. In order to accommodate the transmission components that are electrically connected to the circuit board, it is preferable that the second space is recessed towards the first space near one of the wiring components. By using the height misalignment of the partition of the intermediate housing, a corresponding third space is created in the first space. The width of the first space (excluding the third space) plus the width of the second space equals the usable width inside the housing. The width of the third space plus the width of the second space equals the usable width inside the housing. The height misalignment of the partition of the intermediate housing increases the space for installing the transmission components. At the same time, the physical isolation of the partition prevents the withstand voltage breakdown between the high voltage system on the conductive circuit in the first space and the low voltage system on the back circuit board.

[0032] like Figure 3 As shown, the entire circuit board is set in the second space and covers the corresponding third space. At the same time, the partition can be used to make room for the installation of larger components on the circuit board in the first space. These partitions are set at the edge positions of each component in the first space so as not to interfere with or affect the components.

[0033] like Figure 4 and Figure 5 As shown, the two ends of the first space are respectively set as fourth spaces 1000 for accommodating the wiring assembly 200. Between the two fourth spaces 1000, there are sequentially arranged a fifth space 3000 for accommodating the electromagnetic assembly 300, a sixth space 4000 for accommodating the arc extinguishing assembly 400, and a seventh space 5000 for accommodating the operating assembly 500.

[0034] The fifth space 3000 and the sixth space 4000 are arranged along the height direction of the shell 100, and the sum of their heights is consistent with the usable height inside the shell 100. The fifth space 3000, the seventh space 5000 and the third space 2000 are arranged sequentially along the length direction of the shell 100.

[0035] In this embodiment, after excluding the fourth spaces at both ends, the length between the fourth spaces is utilized to the maximum extent. The fifth and sixth spaces are set along the height direction of the housing, while making full use of the available height within the housing. The height of the sixth space used to accommodate the arc-extinguishing components is increased as much as possible. Consequently, an arc-extinguishing chamber with 15 arc-extinguishing plates can be set within the sixth space 4000, increasing the number of arc-extinguishing plates from 12 in general products to 15, which can greatly improve the breaking capacity of the product. At the same time, the original electromagnetic components can be retained, and the design of the electromagnetic components close to the wiring components allows for a larger intermediate area.

[0036] The central area is first divided into two parts, one for accommodating the operating components and the other for a third space. Through the relatively oblique design of the two, a reserved space of 6000 is set between them. Moreover, since the transmission components and the operating components extend to opposite sides, a longer reserved space can be created between them. This can meet the installation requirements of current transformers and manganese copper resistor metering solutions, satisfy the customized needs of different customers, and also accommodate larger current transformers, enabling larger breaking currents. This reserved space can accommodate a 63A current transformer coil.

[0037] A current transformer is installed in the reserved space 6000, and the current transformer is electrically connected to the circuit board 600 located in the second space through a small hole.

[0038] Simultaneously, a manganin resistor can also be installed within the reserved space 6000, and the manganin resistor is electrically connected to the circuit board 600 located in the second space through a small hole. The bottom of the reserved space 6000 is provided with a slot 7000 for installing the manganin resistor. By providing the slot, the manganin resistor can be directly inserted into the slot, achieving fixed positioning of the manganin resistor. The reserved space allows for the selection of different circuit metering methods to meet diverse customer needs.

[0039] Both can achieve physical isolation using the partitions within the intermediate shell itself.

[0040] like Figure 6 and Figure 7 As shown, a third space is obtained from the first space using a recess in the second space. A motor 710 is vertically positioned, and a gear set 720 transmits the motor's kinetic energy to the handle 800. The gear set moves most of the third space upwards to one side of the handle. Figure 5 As shown, the operating mechanism 500 is positioned on one side of the electromagnetic component below the handle, thus freeing up a larger space below the gear set to accommodate the reserved space.

[0041] In this embodiment, components that were originally part of the circuit breaker are incorporated as much as possible. Figure 4 The circuit breaker is moved to the left and the space on the right is used to accommodate the new circuit board and transmission components, so as to realize the Internet of Things function of the miniature circuit breaker while maintaining the same size of the housing.

[0042] The embodiments should not be regarded as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A high-breaking-capacity, high-current, small-size intelligent circuit breaker, characterized in that: It includes a housing (100) with a certain width, the housing (100) including a middle housing (110) and side covers (120) disposed on both sides of the middle housing (110), a first space (9000) and a second space (8000) for placing a circuit board (600) are respectively formed between the middle housing (110) and the side covers (120). The second space (8000) is recessed toward the first space (9000) to form a third space (2000) for accommodating the transmission assembly (700). The first space (9000) is configured at both ends as a fourth space (1000) for accommodating the wiring assembly (200). Between the two fourth spaces (1000), there is a fifth space (3000) for accommodating the electromagnetic assembly (300), a sixth space (4000) for accommodating the arc extinguishing assembly (400), and a seventh space (5000) for accommodating the operating assembly (500). The fifth space (3000) and the sixth space (4000) are arranged along the height direction of the shell (100), and the sum of their heights is consistent with the usable height inside the shell (100). The fifth space (3000), the seventh space (5000) and the third space (2000) are arranged sequentially along the length direction of the shell (100).

2. The high breaking capacity, high current, and small size intelligent circuit breaker according to claim 1, characterized in that: The sixth space (4000) is equipped with an arc-extinguishing chamber containing 15 arc-extinguishing plates.

3. The high breaking capacity, high current, and small size intelligent circuit breaker according to claim 1, characterized in that: A reserved space (6000) is also provided between the seventh space (5000) and the third space (2000).

4. A high-breaking-capacity, high-current, small-size intelligent circuit breaker according to claim 3, characterized in that: A current transformer is provided in the reserved space (6000), and the current transformer is electrically connected to the circuit board (600) located in the second space through a small hole.

5. A high breaking capacity, high current, and small size intelligent circuit breaker according to claim 3, characterized in that: The reserved space (6000) is equipped with a manganese copper resistor, and the manganese copper resistor is electrically connected to the circuit board (600) located in the second space (8000) through a small hole.

6. A high breaking capacity, high current, and small size intelligent circuit breaker according to claim 5, characterized in that: The reserved space (6000) has a slot (7000) at the bottom for installing manganese copper resistors.

7. A high breaking capacity, high current, and small size intelligent circuit breaker according to claim 1, characterized in that: The first space (9000) and the second space (8000) occupy the width direction of the housing (100).

8. A high breaking capacity, high current, and small size intelligent circuit breaker according to claim 1, characterized in that: The second space (8000) and the third space (2000) occupy the width direction of the housing (100).

9. A high breaking capacity, high current, and small size intelligent circuit breaker according to claim 1, characterized in that: The width of the housing is 18mm.

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