An integrated miniature circuit breaker residual current circuit breaker

Abstract

The utility model relates to a leakage circuit breaker of integrated miniature circuit breaker, including the casing, be provided with miniature circuit breaker module and circuit board and mutual inductor and wiring terminal group in the casing, wiring terminal group includes incoming line terminal group and outgoing line terminal group, miniature circuit breaker module is close to the setting of incoming line terminal group, mutual inductor is close to the setting of outgoing line terminal group, and circuit board is installed in one side of mutual inductor. The utility model discloses by with miniature circuit breaker module, circuit board, mutual inductor and wiring terminal group are integrated in a casing, make whole device compact structure, integrated design reduces the external connecting line between each part, reduces the failure risk because of the poor or loose of line connection, and miniature circuit breaker module has overload and short circuit protection function, and mutual inductor can detect leakage current, and circuit board can handle and analyze the signal of detection, realizes leakage protection function.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a residual current circuit breaker that integrates a miniature circuit breaker. Background Technology

[0002] In the field of power distribution, residual current circuit breakers (RCCBs) are core equipment for ensuring circuit safety. Traditional RCCBs mostly adopt a split design, with components such as miniature circuit breakers, instrument transformers, and circuit boards installed separately and connected via external wiring. This results in complex external wiring, which is prone to poor connections or loosening, increasing the risk of equipment failure. When a fault occurs, maintenance personnel find it difficult to quickly locate the problem, and repairs are time-consuming, labor-intensive, and costly. At the same time, with the growth of electricity demand and the diversification of electrical equipment, traditional circuit breakers can only control and protect a single circuit, failing to meet the needs of independent control of multiple circuits. Moreover, traditional circuit breaker handles lack a hovering function, making it difficult for operators to intuitively understand the working status and hindering precise control. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a residual current circuit breaker that is compact in structure, highly integrated, stable and reliable in operation, easy to maintain, and capable of independent control and protection of multiple circuits.

[0004] To achieve the above objectives, this utility model employs a residual current circuit breaker with an integrated miniature circuit breaker, comprising a housing, within which are disposed a miniature circuit breaker module, a circuit board, a current transformer, and a terminal block assembly. The terminal block assembly includes an incoming terminal block assembly and an outgoing terminal block assembly. The miniature circuit breaker module is disposed near the incoming terminal block assembly, the current transformer is disposed near the outgoing terminal block assembly, and the circuit board is mounted on one side of the current transformer.

[0005] Compared with existing technologies, the advantages of the above structure are as follows: by integrating the miniature circuit breaker module, circuit board, current transformer, and terminal block into a single housing, the entire device becomes compact. The integrated design reduces external wiring between components, lowering the risk of failure due to poor or loose wiring connections. When a fault occurs, maintenance personnel can more quickly locate the problem and perform repairs or component replacements. The miniature circuit breaker module has overload and short-circuit protection functions, the current transformer can detect leakage current, and the circuit board can process and analyze the detected signals to achieve leakage protection. Furthermore, this integrated design reduces the number and types of components, lowering production costs.

[0006] This utility model is further configured such that the miniature circuit breaker module includes at least three miniature circuit breaker units. The incoming terminal group includes incoming terminals corresponding to the number of miniature circuit breaker units, and the outgoing terminal group includes outgoing terminals corresponding to the number of miniature circuit breaker units. One end of each miniature circuit breaker unit is electrically connected to its corresponding incoming terminal via a conductive connector, and the other end of each miniature circuit breaker unit is electrically connected to a current transformer via a wire. The current transformer is electrically connected to its corresponding outgoing terminal via wires, and the circuit board is electrically connected to the current transformer via wires. By including at least three miniature circuit breaker units in the miniature circuit breaker module, this residual current circuit breaker can achieve independent control and protection of multiple circuits. The number of terminals in both the incoming and outgoing terminal groups corresponds to the number of miniature circuit breaker units, and this one-to-one correspondence makes the wiring clearer and more orderly.

[0007] This utility model further specifies that the conductive connector is a terminal block disposed within the incoming terminal. One end of the terminal block is installed inside the incoming terminal, and the other end extends into one end of the miniature circuit breaker unit. By securely mounting one end of the terminal block within the incoming terminal and extending the other end into one end of the miniature circuit breaker unit, the electrical connection between the incoming terminal and the miniature circuit breaker unit is made more robust, and the use of the terminal block simplifies the wiring operation between the incoming terminal and the miniature circuit breaker unit.

[0008] This utility model is further configured as a miniature circuit breaker unit including a base and a cover plate covering the base. A handle is provided between the base and the cover plate. The handle has a protrusion. The handle is mounted on the base via a first pin provided on the base. The base also has a second pin located on one side of the handle. A suspension spring is wound around the second pin. The base has a stop block located on the side of the suspension spring away from the handle. A tension spring is also sleeved on the first pin. The tension spring is located between the handle and the base. The two ends of the tension spring are respectively connected to the handle and the base. By observing the hovering position of the handle, the operator can intuitively understand the current working status of the circuit breaker, facilitating precise control of the circuit and meeting the usage needs in different scenarios. The tension spring is sleeved on the first pin, connecting the handle and the base. It provides a certain restoring force to the handle. After operating the handle, the tension spring ensures that the handle can accurately and stably return to the initial position, avoiding shaking or positional deviation of the handle due to inertia or other factors, thus improving the stability and reliability of operation. The abutment block is located on the side of the hovering spring away from the handle. When the handle is rotated to the open position, the abutment block can restrict the rotation of the handle, ensuring that the handle accurately stops at the open position, guaranteeing that the circuit breaker can reliably disconnect the circuit, and improving the safety of the equipment. Attached Figure Description

[0009] Figure 1This is a structural schematic diagram of an embodiment of the present utility model.

[0010] Figure 2 This is a front view schematic diagram of the internal structure of the shell according to an embodiment of the present utility model.

[0011] Figure 3 This is a three-dimensional schematic diagram of the internal structure of the shell according to an embodiment of the present utility model.

[0012] Figure 4 This is a schematic diagram of the connection structure between the miniature circuit breaker unit and the incoming terminal in an embodiment of this utility model.

[0013] Figure 5 This is a diagram showing the closing state of a miniature circuit breaker unit according to an embodiment of this utility model.

[0014] Figure 6 This is a hovering state diagram of a miniature circuit breaker unit according to an embodiment of this utility model.

[0015] Figure 7 This is a diagram showing the tripping state of a miniature circuit breaker unit according to an embodiment of this utility model. Detailed Implementation

[0016] like Figures 1-7 As shown, an embodiment of this utility model provides a residual current circuit breaker with integrated miniature circuit breaker, comprising a housing 1. The housing 1 integrates a miniature circuit breaker module 2, a circuit board 3, a current transformer 4, and a terminal block assembly. The terminal block assembly consists of an incoming terminal block 5 and an outgoing terminal block 6. In terms of spatial layout, the miniature circuit breaker module 2 is positioned close to the incoming terminal block 5, the current transformer 4 is positioned close to the outgoing terminal block 6, and the circuit board 3 is mounted on one side of the current transformer 4.

[0017] The miniature circuit breaker module 2 includes at least three miniature circuit breaker units 21. The incoming terminal group 5 includes incoming terminals 51 corresponding to the number of miniature circuit breaker units 2, and the outgoing terminal group 6 includes outgoing terminals 61 corresponding to the number of miniature circuit breaker units 2. One end of each miniature circuit breaker unit 21 is electrically connected to the corresponding incoming terminal 51 through a terminal block 7. One end of the terminal block 7 is securely installed inside the incoming terminal 51, and the other end extends into one end of the miniature circuit breaker unit 21. The other end of each miniature circuit breaker unit 21 is electrically connected to a current transformer 4 through a wire. The current transformer 4 is electrically connected to the corresponding outgoing terminal 61 through a wire. The circuit board 3 is connected to the current transformer 4 through a wire to perform electrical signal connection, thereby realizing the leakage current detection and protection function.

[0018] The miniature circuit breaker unit 21 itself includes a base 211 and a cover plate 212 covering the base 211. A handle 213 is provided between the base 211 and the cover plate 212. A protrusion 214 is provided on the handle 213. The handle 213 is mounted on the base 211 via a first pin provided on the base 211. A second pin is also provided on the base 211 and is located on one side of the handle 213. A suspension spring 215 is wound around the second pin. A tension spring 216 is also sleeved on the first pin. The tension spring 216 is located between the handle 213 and the base 211 and its two ends are respectively connected to the handle 213 and the base 211 (although not clearly shown in the figure, it is present in the actual structure). In addition, a stop block 217 is provided on the base 211. The stop block 217 is located on the side of the suspension spring 215 away from the handle 213.

[0019] It should be noted that only one set of components is marked in detail in the diagram, but the entire structure contains three identical sets of components.

[0020] This miniature circuit breaker unit has three operating states: open, closed, and suspended. Its working principle is as follows: When the user operates the handle 213, rotating it to a certain position, the protrusion 214 on the handle 213 contacts the suspension spring 215 and is subjected to its elastic force. At this time, if the user no longer applies external force, the protrusion 215 will remain in this position under the elastic force of the suspension spring 215, and the handle 213 will be in the suspended state. This suspended state facilitates temporary operations or observation of the circuit breaker status. When the user continues to operate the handle 213 with force, overcoming the elastic force of the suspension spring 215, the handle 213 continues to rotate until the protrusion 215 contacts the abutment block 215. When the abutment block 217 contacts and is blocked, the handle 213 reaches the open position. At this time, the contacts inside the circuit breaker are open and the circuit is cut off. The presence of the abutment block 217 ensures that the handle 213 can accurately stay in the open position, ensuring the reliability of the opening. When the user releases the handle 213, under the action of the tension spring 216, the handle 213 will rotate in the opposite direction around the first pin, causing the protrusion 215 to leave the abutment block 217 and the suspension spring 216, and finally return to the initial position. During this process, the contacts inside the circuit breaker close, the circuit is connected, and the handle 213 is in the closed state. If the user does not apply additional operating force to the handle 213, the handle 213 will remain stably in the closed position.

[0021] Of course, in addition to the above embodiments, this utility model may have other various embodiments. Without departing from the essential technical solution of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, and these changes or modifications are equivalent to the technical solution in this patent. Therefore, these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. A residual current circuit breaker integrating a miniature circuit breaker, characterized in that: The device includes a housing, within which are disposed a miniature circuit breaker module, a circuit board, a current transformer, and a terminal block assembly. The terminal block assembly includes an incoming terminal block assembly and an outgoing terminal block assembly. The miniature circuit breaker module is disposed near the incoming terminal block assembly, and the current transformer is disposed near the outgoing terminal block assembly. The circuit board is mounted on one side of the current transformer.

2. The residual current circuit breaker integrating a miniature circuit breaker according to claim 1, characterized in that: The miniature circuit breaker module includes at least three miniature circuit breaker units. The incoming terminal group includes incoming terminals corresponding to the number of miniature circuit breaker units, and the outgoing terminal group includes outgoing terminals corresponding to the number of miniature circuit breaker units. One end of each miniature circuit breaker unit is electrically connected to the corresponding incoming terminal through a conductive connector, and the other end of each miniature circuit breaker unit is electrically connected to a current transformer through a wire. The current transformer is electrically connected to the corresponding outgoing terminal through a wire, and the circuit board is electrically connected to the current transformer through a wire.

3. The residual current circuit breaker integrating a miniature circuit breaker according to claim 2, characterized in that: The conductive connector is a terminal block installed inside the incoming terminal. One end of the terminal block is installed inside the incoming terminal, and the other end extends into one end of the miniature circuit breaker unit.

4. The residual current circuit breaker integrating a miniature circuit breaker according to claim 2, characterized in that: The miniature circuit breaker unit includes a base and a cover plate on the base. A handle is provided between the base and the cover plate. The handle has a protrusion. The handle is mounted on the base via a first pin. The base also has a second pin located on one side of the handle. A suspension spring is wound around the second pin. The base has a stop block located on the side of the suspension spring away from the handle. A tension spring is also sleeved on the first pin, located between the handle and the base. The two ends of the tension spring are connected to the handle and the base, respectively.

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