Miniature circuit breaker cavity structure
By setting the main circuit component chamber and functional board chamber in the small circuit breaker housing, the problem of volume increase in traditional small circuit breakers when adding protection and communication functions is solved, and the small circuit breaker is small in size and appearance is close to traditional The effect of the structure also enhances functional adaptability.
Patent Information
- Application Number
- CN202420239168.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-31
AI Technical Summary
When traditional small circuit breakers increase voltage, current, residual current protection functions, temperature measurement, and multiple communication functions, they need to add transformer cavity and functional board chamber outside the housing, resulting in a large size and a different appearance from the traditional structure. Larger.
A small circuit breaker cavity structure is designed, two main circuit component chambers are arranged in the housing, which are respectively used to place transformers and functional boards, and the chamber is formed through partitions to reduce space occupation and avoid the shell's external cavity. , keeping the small circuit breaker small in size and appearance close to the traditional structure.
The built-in transformer and functional board chamber is achieved without adding additional volume, enhancing protection and communication capabilities, ensuring the appearance of the small circuit breaker is consistent with the traditional structure, while improving space utilization and functional adaptability.
Smart Images
Figure CN222338191U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of small circuit breakers, in particular to a cavity structure of a small circuit breaker. Background Art
[0002] With the increasing requirements of power systems, miniature circuit breakers with control circuit components that have intelligent functions such as power detection, communication, and control are gradually replacing traditional miniature circuit breakers.
[0003] At present, the traditional miniature circuit breaker with control circuit components only has thermal magnetic protection function in the shell. When adding voltage, current, and residual current protection functions, it is necessary to add the transformer cavity corresponding to these functions outside the shell of the miniature circuit breaker. At the same time, when adding temperature measurement and multiple communication functions to the traditional miniature circuit breaker with control circuit components, it is necessary to add the functional board chamber corresponding to these functions outside the shell of the miniature circuit breaker. However, this installation method makes the entire miniature circuit breaker larger in size, which is quite different from the appearance of the traditional structure. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a cavity structure of a small circuit breaker. The small circuit breaker adopting the cavity structure has a small volume and is similar in appearance to a traditional structure.
[0005] In order to solve the above problems, the following technical solutions are provided:
[0006] The cavity structure of the miniature circuit breaker of the utility model comprises a shell of the miniature circuit breaker, wherein the shell has at least two main circuit component chambers, and the characteristic is that the shell corresponding to the main circuit component chambers has a first chamber for placing a mutual inductor and a second chamber for placing an additional function board.
[0007] The main circuit component chambers are arranged side by side in sequence in the shell, and the first chamber and the second chamber are both located between two adjacent main circuit component chambers.
[0008] There is a partition between two adjacent main circuit assembly chambers, and the two wiring chambers of the main circuit assembly are respectively located at the two corners of the upper part of the partition. The partition inside the wiring chamber has a first notch, thereby forming two first chambers; the partition below the wiring chamber has a second notch, thereby forming two second chambers.
[0009] The first chamber located on one side is used to place a current transformer. The first chamber located on the other side is used to place a zero-sequence transformer.
[0010] The main circuit assembly chambers are two.
[0011] The main circuit component has four chambers, the zero-sequence transformer is in a long waist shape, and the zero-sequence transformer runs through all the corresponding first chambers.
[0012] The above solution has the following advantages:
[0013] Since the housing corresponding to the main circuit assembly chamber of the miniature circuit breaker cavity structure of the utility model has a first chamber for placing a transformer and a second chamber for placing an additional function board, the miniature circuit breaker cavity structure is provided with a first chamber for placing a transformer and a second chamber for placing an additional function board in the main circuit assembly chamber, so there is no need to install a cavity outside the housing, so that the miniature circuit breaker has no additional protruding structure, and the volume of the entire miniature circuit breaker is hardly enlarged, so that the miniature circuit breaker has the same appearance as the traditional structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the cavity structure of the miniature circuit breaker of the utility model (with the front cover plate hidden);
[0015] Figure 2 It is a three-dimensional schematic diagram of the cavity structure of the miniature circuit breaker of the utility model under the cavity structure of two main circuit components (the front cover and the rear cover are hidden);
[0016] Figure 3 It is a three-dimensional schematic diagram of the cavity structure of the miniature circuit breaker of the utility model under the cavity structure of the four main circuit components (the front cover and the rear cover are hidden); DETAILED DESCRIPTION
[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0018] like Figure 1 , Figure 2 and Figure 3 As shown, the cavity structure of the miniature circuit breaker of the utility model includes a shell 1 of the miniature circuit breaker. The front of the shell 1 has a front cover plate, and the back has a rear cover plate. There are at least two main circuit component chambers 4 in the shell 1, and the main circuit component chambers 4 are arranged side by side in sequence in the shell 1. The shell 1 corresponding to the circuit chamber has a first chamber 7 for placing a mutual inductor and a second chamber 3 for placing an additional functional board, and the first chamber 7 and the second chamber 3 are both located between two adjacent main circuit component chambers 4. The first chamber 7 and the second chamber 3 are arranged in two main circuit component chambers 4, so that the two adjacent main circuit component chambers 4 can share the first chamber 7 and the second chamber 3, which reduces the space occupied and further reduces the volume of the entire miniature circuit breaker.
[0019] like Figure 1 , Figure 2 and Figure 3As shown, there is a partition between two adjacent main circuit component chambers 4, and the two wiring chambers 5 of the main circuit component are respectively located at the two corners of the upper part of the partition. There are first notches on the partitions inside the wiring chambers 5, thereby forming two first chambers 7. The first chamber 7 on one side is used to place the current transformer 2. The first chamber 7 on the other side is used to place the zero sequence transformer 6. Figure 2 As shown, the two-pole miniature circuit breaker has one partition, the main circuit component chambers 4 have two, the current transformer 2 and the zero-sequence transformer 6 are respectively located in the corresponding first chambers 7, and the current transformer 2 and the zero-sequence transformer 6 both pass through the two main circuit component chambers 4. Figure 3 As shown, the four-pole miniature circuit breaker has three partitions, four main circuit component chambers 4, and each first chamber 7 located on one side has a current transformer 2, and the current transformer 2 is respectively located in two connected main circuit component chambers 4. The zero sequence transformer 6 is a long waist type, which runs through all the first chambers 7 located on the other side.
[0020] like Figure 1 As shown, there are second notches on the partitions below the wiring chamber 5, thereby forming two second chambers 3. There are slots on the two side walls of the second chamber 3 to position the function board, and there is a gap between the function board and the top of the second chamber 3 to form a space for accommodating the electrical components integrated on the function board.
[0021] The cavity structure of the miniature circuit breaker of the utility model sets a transformer chamber for adding safety functions and a function board chamber for adding multiple communication or control functions in the shell 1, thereby improving the utilization rate of the space in the shell 1 of the miniature circuit breaker, so that in addition to conventional components, the circuit breaker is additionally provided with a first chamber 7 for installing a transformer and a second chamber 3 for installing a function board. In this way, on the basis of the original thermal magnetic protection, multiple protection functions such as voltage, current, and residual current can be added. By using the additional function board, a variety of communication modes can be derived, such as power carrier, 4G / 5G, WiFi, BLE and other communications, thereby ensuring that the circuit breaker can adapt to various needs.
Claims
1. A miniature circuit breaker cavity structure, comprising a housing of a miniature circuit breaker, wherein the housing has at least two main circuit component chambers, characterized in that: The shell corresponding to the main circuit component chamber has a first chamber for placing the mutual inductor and a second chamber for placing the additional functional board; the main circuit component chambers are arranged side by side in the shell, and the first chamber and the second chamber are located between two adjacent main circuit component chambers; there is a partition between two adjacent main circuit component chambers, and the two wiring chambers of the main circuit component are respectively located at the two corners of the upper part of the partition; there is a first notch on the partition on the inner side of the wiring chamber, thereby forming two first chambers; there is a second notch on the partition below the wiring chamber, thereby forming two second chambers.
2. The miniature circuit breaker cavity structure according to claim 1, characterized in that: The first chamber located on one side is used for placing a current transformer; the first chamber located on the other side is used for placing a zero-sequence transformer.
3. The miniature circuit breaker cavity structure according to claim 1, characterized in that: The main circuit assembly chambers are two.
4. The miniature circuit breaker cavity structure according to claim 2, characterized in that: The main circuit component has four chambers, the zero-sequence transformer is in a long waist shape, and the zero-sequence transformer runs through all the corresponding first chambers.