A molded case circuit breaker with high density wiring structure

Abstract

This utility model discloses a molded case circuit breaker with a high-density wiring structure. The high-density wiring structure includes a circuit breaker body, and the circuit breaker body has a terminal block at its terminals. The terminal block has multiple first and second mounting positions at different heights. The first mounting positions are inclined towards the wiring direction of the operator and have a first conductive element. The second mounting positions have a second conductive element. The staggered arrangement of conductive elements at different heights on the terminal block forms a three-dimensional wiring layout. This design effectively increases the spatial distance and electrical clearance between adjacent terminals without increasing the product width. This layout provides ample operating space for installing large-section conductors, improving wiring convenience and reliability, and also enhances the product's electrical insulation performance and heat dissipation capacity, thereby improving the safety and applicability of the molded case circuit breaker in high-density wiring applications.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to a molded case circuit breaker with a high-density wiring structure. Background Technology

[0002] In power distribution systems, molded case circuit breakers (MCCBs) need to provide reliable connection and protection functions within limited installation space. Their wiring capacity is one of the key indicators for evaluating product suitability. Currently, the wiring slots of traditional MCB terminals are mostly arranged parallel to each other in the same plane. This two-dimensional planar layout reveals significant limitations when faced with the need for large cross-sections or multiple conductors.

[0003] Specifically, the drawbacks of this planar layout are threefold: First, physical dimensions are limited. The width of a single wiring slot determines the diameter of the wires it can accommodate. When the wires are thicker, the safety electrical clearance (creepage distance and clearance) between adjacent wiring slots is difficult to guarantee. Second, the user experience is poor. The side-by-side arrangement of terminals means that the operation of tools on one terminal will be interfered with by the adjacent terminals, especially when performing the final tightening, the operating space is extremely cramped. Third, there are electrical safety hazards. The compact layout makes it easy for wires of different phase sequences to cross contact at the outlet. If the insufficient operating space leads to wire lug crimping or non-standard wiring, it will further increase the risk of phase-to-phase short circuits.

[0004] Therefore, the applicant has made beneficial designs and found a way to solve the above problems. The technical solution to be introduced below is generated in this context. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of traditional molded case circuit breaker designs and to provide a product that improves wiring efficiency, wiring operation space, and heat dissipation capacity of the terminals.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A molded case circuit breaker with a high-density wiring structure includes a circuit breaker body. The wiring terminals of the circuit breaker body are provided with a terminal block. The terminal block is provided with a plurality of first mounting positions and second mounting positions at different heights. The first mounting positions are inclined toward the wiring direction of the operator. The first mounting positions are provided with a first conductive element, and the second mounting positions are provided with a second conductive element. The first conductive element and the second conductive element are arranged in a staggered manner in space.

[0008] Preferably, an insulating partition is provided between adjacent first mounting positions and between adjacent second mounting positions.

[0009] Preferably, the terminal block is provided with a first terminal and a second terminal corresponding to the first mounting position and the second mounting position, respectively, and the height of the first terminal is higher than that of the second terminal.

[0010] Preferably, both the first conductive element and the second conductive element are provided with conductive connection portions and are embedded in the first terminal and the second terminal.

[0011] Preferably, the conductive connection part is tightly connected to the terminal by a fastening screw that passes through the first terminal and the second terminal block and is threaded to the terminal.

[0012] Preferably, the outer bottom of the second mounting position is provided with a reinforcing part.

[0013] Preferably, the first conductive element and the second conductive element are provided with at least one terminal, and the first conductive element and the second conductive element are provided with a heat dissipation structure.

[0014] Preferably, the heat dissipation structure is configured as heat dissipation grooves, heat dissipation fins, and heat dissipation ribs.

[0015] Beneficial effects:

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention improves the traditional planar wiring layout into a three-dimensional wiring layout by setting staggered conductive components at different heights of the terminal block. Without increasing the product width, it effectively increases the spatial distance between adjacent terminals, providing more ample tool space for wiring operations. At the same time, it significantly increases the electrical clearance and creepage distance between adjacent terminals. This solves the problem of difficult installation of large cross-section wires, improves the convenience and reliability of wiring operations, and enhances the electrical insulation performance and heat dissipation capacity of the product. It fundamentally improves the safety and applicability of molded case circuit breakers in high-density wiring applications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a molded case circuit breaker with a high-density wiring structure according to this utility model;

[0019] Figure 2 This is an exploded structural diagram of a molded case circuit breaker with a high-density wiring structure according to the present invention.

[0020] Figure 3 This is a schematic diagram of the back structure of the terminal block of a molded case circuit breaker with a high-density wiring structure according to this utility model;

[0021] Figure 4 This is a left view of the terminal block of a molded case circuit breaker with a high-density wiring structure according to this utility model;

[0022] The correspondence between the labels and component names in the attached figures is as follows:

[0023] Reference numerals: 1. Circuit breaker body; 2. Terminal block; 3. First conductive element; 4. Second conductive element; 5. Conductive connection part; 6. Fastening screw; 7. Terminal; 8. Heat dissipation structure; 11. Terminal; 21. First mounting position; 22. Second mounting position; 23. Insulating partition; 24. First terminal; 25. Second terminal; 221. Reinforcing part. Detailed Implementation

[0024] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0027] Reference example Figures 1 to 4 A high-density wiring structure molded case circuit breaker includes a circuit breaker body 1. The wiring terminals 11 of the circuit breaker body 1 are provided with a terminal block 2. The terminal block 2 is provided with a plurality of first mounting positions 21 and second mounting positions 22 at different heights. The first mounting positions 21 are inclined toward the wiring direction of the operator. The first mounting positions 21 are provided with a first conductive element 3. The second mounting positions 22 are provided with a second conductive element 4. The first conductive element 3 and the second conductive element 4 are arranged in a staggered manner in space.

[0028] By setting staggered conductive components at different heights of the terminal block 2, the traditional planar wiring layout is improved into a three-dimensional wiring layout, breaking through the spatial limitations of the traditional planar layout and unfolding the terminal blocks 7 in the vertical direction. Without increasing the product width, this layout effectively increases the spatial distance between adjacent terminal blocks 7. The inclined orientation of the first mounting position 21 further optimizes the convenience of wiring operations. This three-dimensional layout provides ample room for wiring tools to maneuver within a limited planar projection area, solving the problem of difficult installation of large cross-section wires and improving the convenience and reliability of wiring operations. At the same time, it naturally increases the electrical clearance and creepage distance between adjacent terminals, enhances the electrical insulation performance and heat dissipation capacity of the product, and fundamentally improves the safety and applicability of molded case circuit breakers in high-density wiring applications.

[0029] It is worth mentioning that an insulating partition 23 is provided between adjacent first mounting positions 21 and between adjacent second mounting positions 22. The insulating partition 23 forms a physical barrier, effectively blocking possible accidental short circuit paths between adjacent conductors. Especially when dealing with large cross-section wires or when wire ends are unraveled due to operational errors, it can provide reliable isolation and further enhance the safety margin of the product.

[0030] It is worth mentioning that the terminal block 2 is provided with a first terminal 24 and a second terminal 25 corresponding to the first mounting position 21 and the second mounting position 22, respectively. The height of the first terminal 24 is higher than that of the second terminal 25. By designing the first terminal 24 and the second terminal 25 with different heights, the connection between the terminal block 2 and the terminal 11 is facilitated. At the same time, these terminals also serve as structural support components, providing rigid support for the first mounting position 21 and the second mounting position 22 that bear the conductive components, ensuring the overall stability of the terminal block 2 when fastening the wires and bearing electromagnetic forces.

[0031] It is worth mentioning that both the first conductive component 3 and the second conductive component 4 are provided with conductive connection parts 5, which are embedded in the first terminal 24 and the second terminal 25. The embedded structure effectively protects the conductive connection parts 5 from external physical damage by the terminal shell. At the same time, the terminal itself becomes a rigid support for the conductive connection parts 5, ensuring that the conductive connection parts 5 will not deform or shift when pressure is applied by the fastening screw 6, thereby ensuring a long-term, stable and low-contact-resistance electrical connection with the terminal 11 of the circuit breaker body 1.

[0032] It is worth mentioning that the conductive connection part 5 is tightly connected to the terminal 11 by a fastening screw 6 that passes through the first terminal post 24 and the second terminal block 2 and is threaded to the terminal 11.

[0033] It is worth mentioning that the bottom of the second mounting position 22 is provided with a reinforcing part 221. The second mounting position 22, which is located at a high position, bears the combined load from the second conductive part 4 and the terminal 7, and is prone to becoming a stress concentration point. Therefore, by providing the reinforcing part 221, the material thickness of the second mounting position 22 is increased, the bending resistance and vibration resistance of this part are improved, and structural deformation caused by long-term stress or external impact is prevented, thereby ensuring the long-term stability of the electrical connection of the entire terminal block 2.

[0034] It is worth mentioning that the first conductive element 3 and the second conductive element 4 are provided with at least one terminal 7. The first conductive element 3 and the second conductive element 4 are provided with a heat dissipation structure 8. By setting heat dissipation grooves, heat dissipation fins or heat dissipation ribs, the contact area between the conductive element and the surrounding air is effectively increased, and the convective heat dissipation effect is enhanced. This is of great significance for reducing the operating temperature of the terminal 7 and the conductive element and preventing material aging or increased contact resistance due to overheating. It is a key design to ensure the stable operation of the circuit breaker under high load conditions.

[0035] It is worth mentioning that the heat dissipation structure 8 is configured with heat dissipation slots, heat dissipation fins, and heat dissipation ribs. The diverse design options allow the product to flexibly adopt the most suitable heat dissipation solution according to different rated currents, operating environments, and cost targets.

[0036] The above description, in conjunction with specific embodiments, provides a further detailed explanation of the present utility model. It should not be construed that the specific implementation of the present utility model is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present utility model, and all such deductions or substitutions should be considered to fall within the scope of protection defined by the claims submitted by the present utility model.

Claims

1. A molded case circuit breaker of high density wiring structure comprising a circuit breaker body (1), characterized in that: The circuit breaker body (1) has a terminal block (2) at the terminal (11). The terminal block (2) has multiple first mounting positions (21) and second mounting positions (22) at different heights. The first mounting position (21) is inclined toward the wiring direction of the operator. The first mounting position (21) has a first conductive element (3), and the second mounting position (22) has a second conductive element (4). The first conductive element (3) and the second conductive element (4) are arranged in a staggered manner in space.

2. The molded case circuit breaker of high density wiring construction of claim 1, wherein: An insulating partition (23) is provided between adjacent first mounting positions (21) and between second mounting positions (22).

3. The molded case circuit breaker of high density wiring configuration of claim 1, wherein: The terminal block (2) is provided with a first terminal (24) and a second terminal (25) corresponding to the first mounting position (21) and the second mounting position (22), respectively. The height of the first terminal (24) is higher than that of the second terminal (25).

4. The molded case circuit breaker of high density wiring construction of claim 3, wherein: The first conductive element (3) and the second conductive element (4) are both provided with conductive connection parts (5), which are embedded in the first terminal (24) and the second terminal (25).

5. The molded case circuit breaker of high density wiring configuration of claim 4, wherein: The conductive connection part (5) is connected to the terminal (11) by a fastening screw (6) that passes through the first terminal post (24) and the second terminal block (2) and is threaded. This tightly connects the conductive connection part (5) to the terminal (11).

6. The molded case circuit breaker of high density wiring configuration of claim 1, wherein: The second mounting position (22) has a reinforcing part (221) at its outer bottom.

7. The molded case circuit breaker of high density wiring construction of claim 1, wherein: The first conductive element (3) and the second conductive element (4) are provided with at least one terminal (7), and the first conductive element (3) and the second conductive element (4) are provided with a heat dissipation structure (8).

8. The molded case circuit breaker of high density wiring construction of claim 7, wherein: The heat dissipation structure (8) is configured as heat dissipation groove, heat dissipation fins, and heat dissipation ribs.

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