An electrical leakage circuit breaker
By placing the leakage current transformer between the circuit breaker body and the terminal block, the problem of excessive length of the leakage current circuit breaker is solved, achieving the effects of space saving and convenient installation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LIANGXIN ELECTRICAL CO LTD
- Filing Date
- 2025-06-06
- Publication Date
- 2026-07-21
AI Technical Summary
The leakage detection module of the existing residual current circuit breaker is set on one side of the length of the single-stage circuit breaker unit, which results in the residual current circuit breaker being too large in length, causing a waste of space.
The leakage current transformer is placed in the blank area between the circuit breaker body and the terminal block, and directly connected to the terminal block through the first wire, eliminating the need for additional wiring and simplifying the installation process.
It saves space in the length direction of the residual current circuit breaker, reduces its size, facilitates installation, and improves installation efficiency.
Smart Images
Figure CN224537019U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of low-voltage electrical technology, and more specifically, to a residual current circuit breaker. Background Technology
[0002] A residual current circuit breaker (RCCB) is an electrical safety device used to detect leakage current in a circuit and automatically cut off the power supply when the leakage current exceeds a safe threshold. It is mainly used to provide protection when equipment experiences leakage faults or when people are electrocuted.
[0003] A residual current circuit breaker (RCCB) typically includes a residual current actuator module, a residual current detection module, and multiple single-pole circuit breaker units. These units are arranged sequentially along the width of the unit. The residual current actuator module is located on one side of the single-pole circuit breaker unit along its width, and the residual current detection module is located on one side along its length. Currently, the residual current detection module in existing RCCBs is attached to the outside of the terminals, resulting in an excessively large length dimension and wasted space. Utility Model Content
[0004] The purpose of this application is to provide a residual current circuit breaker with a smaller size, addressing the shortcomings of the prior art.
[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:
[0006] This application provides a residual current circuit breaker, including: a circuit breaker body, a side cover, wiring terminals, and a residual current detection module. The side cover is spliced to the circuit breaker body in a first direction. The wiring terminals are located inside the side cover. The residual current detection module includes a residual current transformer, which is located between the wiring terminals and the circuit breaker body. It also includes a first conductor, with a first end connected to the main circuit of the residual current circuit breaker and a second end passing through the residual current transformer and electrically connected to a terminal block. The terminal block is connected to an external power source through the wiring terminals.
[0007] Optionally, the first end of the first conductor is connected to a magnetic coil or a stationary contact.
[0008] Optionally, the circuit breaker body includes multiple single-pole circuit breaker units, which are connected sequentially along a second direction, the second direction being perpendicular to the first direction;
[0009] The residual current circuit breaker also includes a residual current actuator, which is connected to the outermost single-pole circuit breaker unit in the second direction and is electrically connected to the residual current transformer.
[0010] Optionally, the leakage current transformer is at least partially disposed within the leakage current actuation unit, and the leakage current detection module further includes a second wire, one end of which is electrically connected to the leakage current transformer and the other end of which is electrically connected to the circuit board of the leakage current actuation module.
[0011] Optionally, the leakage current transformer is fixed to the first side of the circuit breaker body, and the side cover is spliced with the first side of the circuit breaker body.
[0012] Optionally, a first groove is formed between the side cover and the circuit breaker body, and the leakage current transformer is disposed in the first groove.
[0013] Optionally, the circuit breaker housing of the single-pole circuit breaker unit is provided with a second groove, and the terminal block is fixed in the second groove.
[0014] Optionally, a leakage current detection button is provided on the housing of the leakage current actuator, which is used to detect whether the leakage current actuator has malfunctioned.
[0015] Optionally, the housing of the leakage current actuator is provided with a leakage current indicator, which is used to display the leakage current fault status when the leakage current actuator fails.
[0016] Optionally, the leakage current indicator is electrically connected to the circuit board of the leakage current actuator.
[0017] The beneficial effects of this application include:
[0018] This application provides a residual current circuit breaker (RCCB), comprising: a circuit breaker body, a side cover, terminals, and a residual current detection module. The side cover is spliced to the circuit breaker body in a first direction. The terminals are located inside the side cover. The residual current detection module includes a residual current transformer (RCT) located between the terminals and the circuit breaker body. It also includes a first conductor, with one end connected to the main circuit of the RCCB and the other end passing through the RCT and electrically connected to a terminal block. The terminal block is connected to an external power source via the terminals. This RCCB saves space in the length direction by placing the RCT in the blank area between the circuit breaker body and the terminals, thus reducing the length of the RCCB. Furthermore, the first conductor inside the circuit breaker body directly passes through the RCT and connects to the terminal block, eliminating the need for additional winding to pass through the transformer, further reducing the size of the RCCB and facilitating installation. Attached Figure Description
[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is one of the structural schematic diagrams of the residual current circuit breaker provided in the embodiments of this application;
[0021] Figure 2This is a second schematic diagram of the structure of the residual current circuit breaker provided in the embodiments of this application;
[0022] Figure 3 This is a partial structural schematic diagram of a residual current circuit breaker provided in an embodiment of this application;
[0023] Figure 4 This is a schematic diagram of the structure of the circuit breaker housing and terminal block of the residual current circuit breaker provided in the embodiments of this application.
[0024] Icons: 100-Residual current circuit breaker; 110-Circuit breaker body; 111-Single-pole circuit breaker unit; 111a-Circuit breaker housing; 111b-Second recess; 120-Side cover; 130-Terminal; 140-Residual current transformer; 150-First conductor; 160-Terminal block; 161-Vertical part; 162-Horizontal part; 170-Residual current actuator; 180-Magnetic coil; 191-Residual current detection button; 192-Residual current indicator. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.
[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] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" 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 application based on the specific circumstances.
[0030] A residual current circuit breaker (RCCB) is an electrical safety device used to detect leakage current in a circuit and automatically disconnect the power supply when the leakage current exceeds a safe threshold. It is primarily used to provide protection in case of equipment leakage faults or electric shock. An RCCB typically includes a leakage current actuation module, a leakage current detection module, and multiple single-pole circuit breaker units. In existing technology, the leakage current detection module is located on one side of the length of the single-pole circuit breaker unit and spliced outside the terminals, resulting in an excessively large length and wasted space.
[0031] To solve the above technical problems, please refer to Figure 1 and Figure 2 This application provides a residual current circuit breaker 100, including: a circuit breaker body 110, a side cover 120, a terminal block 130, and a residual current detection module. The side cover 120 is spliced with the circuit breaker body 110 in a first direction. The terminal block 130 is located inside the side cover 120. The residual current detection module includes a residual current transformer 140, which is located between the terminal block 130 and the circuit breaker body 110. Please refer to the reference. Figure 3 The residual current circuit breaker 100 also includes a first conductor 150. The first end of the first conductor 150 is connected to the main circuit of the residual current circuit breaker 100, and the second end passes through the residual current transformer 140 and is electrically connected to the terminal block 160. The terminal block 160 is connected to the external power supply through the terminal block 130.
[0032] Specifically, the side cover 120 and the circuit breaker body 110 are distributed along a first direction, and the side cover 120 is spliced and fixed to the outer shell of the circuit breaker body 110, wherein the first direction is the length direction of the residual current circuit breaker 100. The wiring terminal 130 is fixed inside the side cover 120. After the side cover 120 and the circuit breaker body 110 are spliced, the wiring terminal 130 is located within the space enclosed by the side cover 120 and the circuit breaker body 110. The leakage current transformer 140 of the leakage current detection module is fixed between the wiring terminal 130 and the circuit breaker body 110. By using the blank area between the wiring terminal 130 and the circuit breaker body 110 to set up the leakage current transformer 140, space in the length direction can be saved, thereby reducing the size of the residual current circuit breaker 100 in the length direction.
[0033] The circuit breaker body 110 contains a first conductor 150. One end of the first conductor 150 is connected to the main circuit, and the other end passes through the residual current transformer 140 and connects to the terminal block 160. It is then connected to an external power source via the terminal block 160 and terminals 130. The first conductor 150 is connected to the terminal block 160 through the residual current transformer 140 to facilitate the residual current transformer 140's detection of the main circuit current. The first conductor 150 directly passes through the residual current transformer 140 and connects to the terminal block 160, eliminating the need for additional winding to pass through the transformer. This saves space, reduces the size of the residual current circuit breaker 100, and facilitates installation.
[0034] The aforementioned residual current circuit breaker 100 saves space in the longitudinal direction by placing the residual current transformer 140 in the blank area between the circuit breaker body 110 and the terminal block 130, thereby reducing the length of the residual current circuit breaker 100. Furthermore, the first conductor 150 inside the circuit breaker body 110 directly passes through the residual current transformer 140 and connects to the terminal block 160, eliminating the need for additional winding to pass through the transformer, further reducing the size of the residual current circuit breaker 100 and facilitating installation.
[0035] Optionally, the leakage current transformer 140 is fixed to the first side of the circuit breaker body 110, and the side cover 120 is spliced to the first side of the circuit breaker body 110.
[0036] With this setup, when installing the residual current circuit breaker 100, the circuit breaker body 110 can be installed first, followed by the installation of the residual current transformer 140. The wiring terminal 130 is then inserted into the side cover 120 and spliced with the circuit breaker body 110, making the installation simple and convenient.
[0037] Optionally, the circuit breaker body 110 includes a plurality of single-pole circuit breaker units 111, which are connected sequentially along a second direction perpendicular to the first direction. The second direction is the width direction of the residual current circuit breaker 100 and also the width direction of the single-pole circuit breaker unit 111. The first direction is the length direction of the residual current circuit breaker 100 and also the length direction of the single-pole circuit breaker unit 111.
[0038] The residual current circuit breaker 100 also includes a residual current actuation unit 170, which is connected in a second direction to the outermost single-pole circuit breaker unit 111. The residual current actuation unit 170 is electrically connected to the residual current transformer 140 to disconnect the main circuit when the residual current detection module detects a residual current fault.
[0039] Optionally, the leakage current actuation unit 170 includes a circuit board and an actuation mechanism electrically connected to the circuit board, and the leakage current transformer 140 is also electrically connected to the circuit board.
[0040] When the residual current circuit breaker 100 experiences a leakage fault, the current transformer outputs a signal to the circuit board. Upon receiving the signal, the circuit board generates a drive signal to activate the actuator and disconnect the main circuit.
[0041] Optionally, the first end of the first conductor 150 is connected to the magnetic coil 180 or the stationary contact, thereby connecting to the main circuit.
[0042] When the circuit breaker body 110 includes multiple single-pole circuit breaker units 111, the number of first conductors 150 is also multiple and corresponds one-to-one with each single-pole circuit breaker unit 111. Each single-pole circuit breaker unit 111 is provided with a corresponding magnetic coil 180 and a stationary contact. The first conductor 150 corresponding to the single-pole circuit breaker unit 111 is connected to the magnetic coil 180 or the stationary contact within the single-pole circuit breaker. It can be understood that the magnetic coil 180 is used to drive the tripping mechanism.
[0043] Optionally, the leakage current transformer 140 is at least partially disposed within the leakage current actuation unit 170, and the leakage current detection module further includes a second wire, one end of which is electrically connected to the leakage current transformer 140 and the other end of which is electrically connected to the circuit board of the leakage current actuation module.
[0044] By placing the leakage current transformer 140 part inside the leakage current actuation unit 170, it is easy for the second wire (i.e. the signal transmission wire of the leakage current transformer 140) to be connected to the circuit board to complete the signal input.
[0045] Optionally, a first groove is formed between the side cover 120 and the circuit breaker body 110, and the leakage current transformer 140 is disposed in the first groove.
[0046] The leakage current transformer 140 can be fixed by placing it in the first groove between the side cover 120 and the circuit breaker body 110. The first groove can be set on the circuit breaker body 110 alone, or on the side cover 120 alone, or partially on the circuit breaker body 110 and partially on the side cover 120, with the two being spliced together to form a complete first groove.
[0047] Alternatively, please refer to Figure 2 and Figure 4 The circuit breaker housing 111a of the single-pole circuit breaker unit 111 is provided with a second groove 111b, and the terminal block 160 is fixed in the second groove 111b.
[0048] Optionally, the terminal block 160 includes a vertical portion 161 and a horizontal portion 162 that is perpendicularly connected to the vertical portion 161. The vertical portion 161 is inserted into the second groove 111b, and the horizontal portion 162 is inserted into the terminal block 130 and electrically connected to the terminal block 130. The second end of the first wire 150 is electrically connected to the vertical portion 161.
[0049] Alternatively, please refer to Figure 1 The leakage current actuator 170 has a leakage current detection button 191 on its housing. The leakage current detection button 191 is used to detect whether the leakage current actuator 170 has malfunctioned.
[0050] Pressing the leakage current detection button 191 simulates a leakage current situation. If the leakage current actuator 170 functions normally, the main circuit will be cut off, indicating that the leakage current actuator 170 is working properly and can achieve leakage current protection. Regularly testing the function of the leakage current actuator 170 can ensure that it can cut off the main circuit in time when a leakage current occurs, preventing electric shock accidents.
[0051] Optionally, the housing of the leakage current actuator 170 is provided with a leakage current indicator 192, which is used to display the leakage current fault status when the leakage current actuator 170 fails.
[0052] When the residual current circuit breaker 100 trips due to leakage, the leakage indicator 192 will automatically pop up, indicating to the user that the current tripping cause is leakage. After the leakage fault is eliminated, the leakage indicator 192 needs to be pressed to reset before power can be restored.
[0053] Optionally, the leakage current indicator 192 is electrically connected to the circuit board of the leakage current actuation unit 170.
[0054] This configuration enables electrical connection between the current transformer 140, the current actuation unit 170, and the current indicator 192. When the current transformer 140 detects a current leakage fault, it transmits a signal to the circuit board. The circuit board then controls the current actuation unit 170 to cut off the main circuit and simultaneously controls the current indicator 192 to display the current leakage fault status.
[0055] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A residual current circuit breaker, characterized in that, include: The circuit breaker body, side cover, wiring terminals, and leakage current detection module are provided. The side cover is spliced to the circuit breaker body in a first direction. The wiring terminals are located inside the side cover. The leakage current detection module includes a leakage current transformer, which is located between the wiring terminals and the circuit breaker body. It also includes a first conductor, the first end of which is connected to the main circuit of the leakage current circuit breaker, and the second end of which passes through the leakage current transformer and is electrically connected to the terminal block. The terminal block is connected to an external power source through the terminal block.
2. The residual current circuit breaker as described in claim 1, characterized in that, The first end of the first wire is connected to a magnetic coil or a stationary contact.
3. The residual current circuit breaker as described in claim 1, characterized in that, The circuit breaker body includes multiple single-pole circuit breaker units, which are connected sequentially along a second direction, which is perpendicular to the first direction. The residual current circuit breaker further includes a residual current actuation unit, which is connected to the outermost single-pole circuit breaker unit in the second direction, and is electrically connected to the residual current transformer.
4. The residual current circuit breaker as described in claim 3, characterized in that, The leakage current transformer is at least partially disposed within the leakage current execution unit. The leakage current detection module further includes a second wire, one end of which is electrically connected to the leakage current transformer and the other end of which is electrically connected to the circuit board of the leakage current execution module.
5. The residual current circuit breaker as described in claim 1, characterized in that, The leakage current transformer is fixed to the first side of the circuit breaker body, and the side cover is spliced to the first side of the circuit breaker body.
6. The residual current circuit breaker as described in claim 1, characterized in that, A first groove is formed between the side cover and the circuit breaker body, and the leakage current transformer is disposed in the first groove.
7. The residual current circuit breaker as described in claim 3, characterized in that, The circuit breaker unit of the single-pole circuit breaker is provided with a second groove in the circuit breaker housing, and the terminal block is fixed in the second groove.
8. The residual current circuit breaker as described in claim 3, characterized in that, The leakage current actuator is equipped with a leakage current detection button on its housing, which is used to detect whether the leakage current actuator has malfunctioned.
9. The residual current circuit breaker as described in claim 3, characterized in that, The housing of the leakage current actuator is provided with a leakage current indicator, which is used to display the leakage current fault status when the leakage current actuator fails.
10. The residual current circuit breaker as described in claim 9, characterized in that, The leakage current indicator is electrically connected to the circuit board of the leakage current actuation unit.