A low-voltage circuit breaker housing and a low-voltage circuit breaker

Abstract

The utility model relates to a low voltage circuit breaker cover shell and low voltage circuit breaker, low voltage circuit breaker cover shell cover is located in the circuit breaker busbar outside, including both sides through the groove body, and a plurality of parallelly arranged guide rib on the side wall and the bottom surface of groove body, the guide rib extends along the through direction, forms the gas guide channel between adjacent guide rib. Compared with prior art, the utility model discloses a cover shell is arranged on the busbar outside of low voltage circuit breaker to avoid the problem that the busbar is exposed outside, is easy to cause the short circuit with the cabinet and itself and causes the dangerous problem. At the same time, the guide rib arranged on the inner wall and the bottom surface of groove body supports the busbar and constitutes the gas guide channel, is favorable to the gas near the busbar in time from the top discharge when being heated by the busbar, promotes the gas flow in the cover shell, to reduce the effect of temperature rise.

Description

Technical Field

[0001] This utility model belongs to the field of circuit breaker technology, and relates to a low-voltage circuit breaker housing and a low-voltage circuit breaker. Background Technology

[0002] A low-voltage circuit breaker is an electrical device used in power systems to connect and disconnect lines and protect important electrical appliances. It automatically disconnects the line when an overload or short-circuit fault occurs, protecting the line and load from damage. With the continuous development of new energy sources, the requirements for circuit breakers are constantly increasing. Within a limited space, they must meet breaking requirements, temperature rise requirements, and installation space constraints, while also ensuring the insulation between phases of the circuit.

[0003] Existing circuit breakers are too large, with significant phase-to-phase spacing. However, to meet the installation dimensions of the new distribution cabinet, the circuit breaker size is reduced, the phase spacing is shortened, and a front-panel wiring method is used. This results in the circuit breaker being too close to the cabinet and the phase spacing being too small. If the busbars are directly exposed, they are prone to short circuits with the cabinet and themselves, causing danger. Furthermore, the role of phase spacers in the front-panel wiring method is limited; they only prevent phase-to-phase short circuits and cannot prevent short circuits between the circuit breaker and the cabinet. Utility Model Content

[0004] The purpose of this utility model is to provide a low-voltage circuit breaker housing and a low-voltage circuit breaker, which ensures the phase-to-phase insulation of the circuit breaker and has designed air ducts on the housing to help reduce temperature rise.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] The first aspect of this utility model provides a low-voltage circuit breaker housing for covering the outside of the circuit breaker busbar, including a groove through both sides and a plurality of guide ribs arranged side by side on the sidewalls and bottom surface of the groove; the guide ribs extend along the through direction, and gas guiding channels are formed between adjacent guide ribs.

[0007] In some specific embodiments, an installation port is provided through the opposite sidewalls of the groove.

[0008] In some specific embodiments, the guide ridge on the bottom surface of the groove has an interruption at a position corresponding to the mounting opening.

[0009] In some specific embodiments, the guide ridge on the bottom surface of the groove is further provided with an assembly pile, the two side walls of the assembly pile protruding outward from the two side walls of the guide ridge, and the assembly pile having a through-hole. The mounting hole serves as a cover assembly structure, allowing the cover to be installed on the outside of the low-voltage circuit breaker housing using screws or other components.

[0010] In some specific embodiments, the assembly pile is cylindrical, with rounded corners connecting to the guide edges on both sides. The cylindrical structure and rounded corner connections reduce flow resistance within the gas guide channel, facilitating longitudinal gas flow and reducing temperature rise.

[0011] In some specific implementations, the spacing b between adjacent guide ridges and the width c of the guide ridges satisfy: b > 2c, in order to balance the structural strength of the device with the flow space.

[0012] In some specific embodiments, the top side of the guide ridge on the bottom surface of the tank is flat to support the busbar.

[0013] In some specific implementations, the distance between the busbar and the top surface of the guide ribs on both sides does not exceed 1 mm, so as to ensure that the gas flows along the air passage but does not overflow.

[0014] In some specific implementations, the guide ridge is a straight convex ridge.

[0015] A second aspect of this utility model provides a low-voltage circuit breaker, including a low-voltage circuit breaker housing as described above.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention addresses the safety issue of exposed busbars in low-voltage circuit breakers by installing a casing around them, preventing potential short circuits between the exposed busbars and the cabinet or the circuit itself. Simultaneously, guide ribs on the inner wall and bottom of the casing support the busbars while forming gas guiding channels. This facilitates the timely discharge of gas near the busbars from the top when heated by the busbars, promoting gas flow within the casing and reducing temperature rise. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a low-voltage circuit breaker in the embodiment;

[0019] Figure 2 This is a schematic diagram of the structure of a low-voltage circuit breaker housing in one embodiment;

[0020] Figure 3 , Figure 4 This is a vertical sectional view of a low-voltage circuit breaker in the embodiment;

[0021] Figure 5 This is a cross-sectional view of the assembly point between the low-voltage circuit breaker housing and the busbar.

[0022] Explanation of markings in the diagram:

[0023] 1-Busbar, 2-Trench, 3-Guide rib, 4-Mounting port, 5-Interruption section, 6-Mounting hole. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The following embodiments are based on the above-described technical solution of the present invention, providing detailed implementation methods and specific operating procedures. However, the scope of protection of the present invention is not limited to the following embodiments.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., used to describe a common object only indicate different instances of the same object, and are not intended to imply that the objects described in this way must be in a given order, whether temporally, spatially, sequentially, or in any other way.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] Example:

[0030] like Figure 1 , Figure 3 , Figure 4 A low-voltage circuit breaker shown includes, for example: Figure 2The low-voltage circuit breaker housing shown is used to cover the circuit breaker busbar 1. It includes a channel 2 that extends through both sides, and multiple guide ribs 3 arranged side by side on the sidewalls and bottom surface of the channel 2. The guide ribs 3 extend along the through direction, and gas guiding channels are formed between adjacent guide ribs 3. Specifically, the guide ribs 3 are straight convex ribs.

[0031] This embodiment uses a casing to protect the busbar of the low-voltage circuit breaker from potential short circuits between the exposed busbar and the cabinet, thus preventing potential hazards. Simultaneously, the guide ribs 3 on the inner wall and bottom of the tank 2 support the busbar 1 while forming a gas guiding channel. This facilitates the timely discharge of gas near the busbar from the top when heated by the busbar, promoting gas flow within the casing and reducing temperature rise.

[0032] An installation port 4 is provided through the opposite side wall of the tank 2.

[0033] The guide ridge 3 on the bottom surface of the groove 2 has an interruption part 5 at the position corresponding to the mounting port 4.

[0034] Assembly piles are also provided on the guide ridge 3 on the bottom surface of the groove 2. The two side walls of the assembly piles protrude outward from the two side walls of the guide ridge 3, and mounting holes 6 are opened through the assembly piles. The mounting holes 6 serve as the housing assembly structure, and the housing can be installed on the outside of the low-voltage circuit breaker housing by means of screws and other components.

[0035] The assembled pile is cylindrical, with rounded corners connecting to the guide ridges on both sides. The cylindrical structure and rounded corner connections reduce flow resistance within the gas guide channel, facilitating longitudinal gas flow and minimizing temperature rise.

[0036] like Figure 5 As shown, the spacing b between adjacent guide ribs 3 and the width c of guide rib 3 satisfy: b > 2c, to balance the structural strength of the device and the flow space. The top sides of multiple guide ribs 3 on the bottom surface of the tank 2 are flat and coplanar, forming a support surface A to support the installation and fixing of the cover.

[0037] The distance between the busbar 1 and the top surface of the guide ribs 3 on both sides shall not exceed 1 mm to ensure that the gas flows along the air passage but does not overflow.

[0038] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A low-voltage circuit breaker enclosure for mounting outside the circuit breaker busbar (1), characterized in that, It includes a channel (2) that runs through both sides, and a number of guide ribs (3) arranged side by side on the sidewalls and bottom surface of the channel (2); the guide ribs (3) extend along the through direction, and gas guide channels are formed between adjacent guide ribs (3).

2. The low-voltage circuit breaker housing according to claim 1, characterized in that, An installation port (4) is provided through the opposite side wall of the groove (2).

3. The low-voltage circuit breaker housing according to claim 1, characterized in that, The guide ridge (3) on the bottom surface of the groove (2) has an interruption (5) at a position corresponding to the mounting port (4).

4. The low-voltage circuit breaker housing according to claim 1, characterized in that, The guide ridge (3) on the bottom surface of the groove (2) is also provided with an assembly pile. The two side walls of the assembly pile protrude outward from the two side walls of the guide ridge (3), and an installation hole (6) is provided through the assembly pile.

5. The low-voltage circuit breaker housing according to claim 1, characterized in that, The assembled pile is cylindrical, and its two sides are connected to the guide edge (3) with rounded corners.

6. The low-voltage circuit breaker housing according to claim 1, characterized in that, The spacing b between adjacent guide edges (3) and the width c of the guide edge (3) satisfy: b > 2c.

7. The low-voltage circuit breaker housing according to claim 1, characterized in that, The top side of the guide ridge (3) on the bottom surface of the groove (2) is flat.

8. The low-voltage circuit breaker housing according to claim 1, characterized in that, The distance between the busbar (1) and the top surface of the guide ribs (3) on both sides does not exceed 1 mm.

9. The low-voltage circuit breaker housing according to claim 1, characterized in that, The guide ridge (3) is a straight convex ridge.

10. A low-voltage circuit breaker, characterized in that, Includes the low-voltage circuit breaker housing as described in any one of claims 1 to 9.

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