circuit breaker

Abstract

The utility model relates to a circuit breaker relates to low pressure electrical technology field. Including the casing and respectively being located on the casing first terminal, second terminal, signal port, operating mechanism and electromagnetic release ware, when the electromagnetic release ware receives the tripping signal, can drive operating mechanism movement to make circuit breaker break, first terminal and second terminal are located on the same side of casing and are interval arrangement, and circuit breaker can be inserted in the busbar of distribution box through first terminal and second terminal, signal port is located on the side opposite with second terminal of casing, and the driving direction of electromagnetic release ware is arranged with the arrangement direction of first terminal and second terminal acute angle. The circuit breaker is compact, and the layout is reasonable, can solve the problem that the circuit breaker is big in prior art.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, and more specifically, to a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. When faults such as leakage, overload, or short circuit occur in the system, the circuit breaker can quickly disconnect the faulty mechanism in the system or cut off the entire power supply to prevent the fault from escalating and avoid causing huge economic losses and casualties.

[0003] With the widespread use of circuit breakers in various electrical equipment, circuit breakers are gradually moving towards miniaturization to meet the installation needs of different electrical devices. However, existing circuit breakers mainly fall into two categories: one uses screw wiring, which is limited by the wiring direction, requires a larger installation height, and occupies the operating space of the circuit breaker's operating handle. Therefore, to ensure sufficient movement space for the operating handle, the overall size of the circuit breaker inevitably increases. The other type is a rectangular circuit breaker (1U circuit breaker), with its input and output terminals located on opposite sides of the housing. This type of circuit breaker is longer and correspondingly larger in size. Smaller distribution boxes (such as 86-type, 118-type, and 120-type distribution boxes) place high demands on the miniaturization of the circuit breakers installed inside. Traditional circuit breakers of these two types suffer from poor internal space design, structure, or component arrangement, resulting in wasted internal space, poor overall structural compactness, and large overall size, making it difficult to meet the market demand for miniaturized circuit breakers. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit breaker with a compact structure and reasonable layout, which can solve the problem of the large size of existing circuit breakers.

[0005] The embodiments of the present invention are implemented as follows:

[0006] In one aspect, the present invention provides a circuit breaker comprising a housing and a first terminal, a second terminal, a signal port, an operating mechanism, and an electromagnetic trip unit respectively disposed on the housing; when the electromagnetic trip unit receives a trip signal, it can drive the operating mechanism to move to open the circuit breaker; the first terminal and the second terminal are respectively disposed on the same side of the housing and spaced apart, and the circuit breaker can be plugged into a busbar of a distribution box through the first terminal and the second terminal; the signal port is disposed on the side of the housing opposite to the second terminal, and the driving direction of the electromagnetic trip unit is set at an acute angle to the arrangement direction of the first terminal and the second terminal. This circuit breaker has a compact structure and reasonable layout, and can solve the problem of large size of existing circuit breakers.

[0007] Optionally, the operating mechanism is located inside the housing and on the side of the housing closer to the first terminal.

[0008] Optionally, the circuit breaker further includes an arc-extinguishing chamber located within the housing, the arc-extinguishing chamber being disposed between the first terminal and the second terminal, and the distance from the arc-extinguishing chamber to the second terminal being less than the distance from the arc-extinguishing chamber to the first terminal.

[0009] Optionally, the electromagnetic trip unit is located on the side of the arc-extinguishing chamber closer to the signal port.

[0010] Optionally, the circuit breaker also includes a thermal trip unit located within the housing, on the side of the housing near the first terminal, which is used to drive the operating mechanism to open the circuit breaker.

[0011] Optionally, the circuit breaker also includes a status indicator window, which can alternately display two different indicators: one indicator to indicate that the circuit breaker is in the open state and the other indicator to indicate that the circuit breaker is in the closed state; the status indicator window and the signal port are located on the same side of the housing.

[0012] Optionally, the indicator may be a light signal indicator or a mechanical indicator.

[0013] Optionally, the circuit breaker also includes a handle movably connected to the housing, the handle being used to drive the operating mechanism to open or close the circuit breaker, the handle and the signal port being located on the same side of the housing.

[0014] Optionally, when the circuit breaker is in the closed state, the side of the handle away from the first terminal is flush with the side of the housing away from the first terminal.

[0015] Optionally, the circuit breaker also includes two protective plates protruding from the housing, the two protective plates being distributed on opposite sides of the handle along a first direction, the first direction being perpendicular to the arrangement direction of the signal port and the handle.

[0016] Optionally, the circuit breaker also includes a handle attached to a handle or housing, which can be pulled out of the distribution box by pulling the handle.

[0017] Optionally, the first terminal and the second terminal are arranged asymmetrically relative to the central axis of the housing.

[0018] Optionally, the shell is square, and the ratio of the shell's length to its height is between 0.7 and 1.5.

[0019] Optionally, the circuit breaker also includes an accessory adjacent to the housing, the accessory having a residual current trip unit that is driven to operate the mechanism; in the event of a residual current fault at the load end, the residual current trip unit can drive the operating mechanism to open the circuit; the accessory has a residual current test button, the residual current test button and the signal port being located on the same side of the housing.

[0020] The beneficial effects of this invention include:

[0021] The circuit breaker provided in this application includes a housing and a first terminal, a second terminal, a signal port, an operating mechanism, and an electromagnetic trip unit respectively disposed on the housing. When the electromagnetic trip unit receives a trip signal, it can drive the operating mechanism to move and cause the circuit breaker to open. The first terminal and the second terminal are respectively disposed on the same side of the housing and are spaced apart. The circuit breaker can be plugged into the busbar of the distribution box through the first terminal and the second terminal. The signal port is disposed on the side of the housing opposite to the second terminal, and the driving direction of the electromagnetic trip unit is set at an acute angle to the arrangement direction of the first terminal and the second terminal. By disposing the first terminal and the second terminal on the same side of the housing, disposing the signal port on the side of the housing opposite to the first terminal, and setting the driving direction of the electromagnetic trip unit at an acute angle to the arrangement direction of the first terminal and the second terminal, this application allows the operating mechanism to move towards the side of the housing away from the signal port according to the position of the electromagnetic trip unit. This makes the layout of the internal components of the circuit breaker more compact and solves the problems of large size and insufficient space utilization of existing circuit breakers. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is one of the structural schematic diagrams of a circuit breaker provided in an embodiment of the present invention;

[0024] Figure 2 This is a second schematic diagram of the structure of the circuit breaker provided in an embodiment of the present invention;

[0025] Figure 3 This is the third schematic diagram of the circuit breaker provided in the embodiment of the present invention;

[0026] Figure 4 This is the fourth schematic diagram of the circuit breaker provided in the embodiments of the present invention;

[0027] Figure 5 This is the fifth schematic diagram of the circuit breaker provided in the embodiments of the present invention;

[0028] Figure 6 This is the sixth schematic diagram of the circuit breaker provided in the embodiment of the present invention;

[0029] Figure 7 This is the seventh schematic diagram of the circuit breaker provided in the embodiment of the present invention;

[0030] Figure 8 This is the eighth schematic diagram of the circuit breaker provided in the embodiment of the present invention;

[0031] Figure 9 This is the ninth schematic diagram of the circuit breaker provided in the embodiment of the present invention;

[0032] Figure 10 This is the tenth schematic diagram of the circuit breaker provided in the embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of a circuit breaker installed in a distribution box according to an embodiment of the present invention.

[0034] Icons: 10-Housing; 11-First connector; 12-Second connector; 21-First terminal; 22-Second terminal; 30-Signal port; 40-Operating mechanism; 50-Electromagnetic trip unit; 61-Moving contact; 62-Stationary contact; 70-Arc extinguishing chamber; 80-Thermal trip unit; 91-Status indicator window; 92-Handle; 93-Protective plate; 94-Handle; 95-Accessories; 96-Leakage test button; 200-Busbar; 300-Distribution box; θ-First angle; a1-First distance; a2-Second distance; b1-First length; b2-Second length; a-Length direction of housing; b-Height direction of housing. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0037] 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.

[0038] In the description of this invention, 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 invention is in use. They are only for the convenience of describing this invention 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 of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0039] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the description of this invention, it should also be noted that, unless otherwise explicitly 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 invention based on the specific circumstances.

[0041] Please refer to Figure 1 , Figure 2 and Figure 11This embodiment provides a circuit breaker, which includes a housing 10 and a first terminal 21, a second terminal 22, a signal port 30, an operating mechanism 40, and an electromagnetic trip unit 50 respectively disposed on the housing 10. When the electromagnetic trip unit 50 receives a trip signal, it can drive the operating mechanism 40 to move so that the circuit breaker is tripped. The first terminal 21 and the second terminal 22 are respectively disposed on the same side of the housing 10 and are spaced apart. The circuit breaker can be plugged into the busbar 200 of the distribution box 300 through the first terminal 21 and the second terminal 22. The signal port 30 is disposed on the side of the housing 10 opposite to the second terminal 22. The driving direction of the electromagnetic trip unit 50 is set at an acute angle to the arrangement direction of the first terminal 21 and the second terminal 22.

[0042] It should be noted that in this embodiment, the aforementioned housing 10 can be a square housing 10, and the ratio of the length to the height of the housing 10 is between 0.7 and 1.5. For example, the height ratio can be 0.7, 0.8, 1.0, 1.1, 1.3, 1.5, etc., which will not be listed individually in this application. Please refer to [reference needed] for the length direction a and the height direction b of the housing. Figure 1 As shown, the length direction 'a' of the housing is the direction of the line connecting the first terminal 21 and the second terminal 22, and the height direction 'b' of the housing is the direction from the signal port 30 toward the second terminal 22. Figure 1 and Figure 2 As shown. The first terminal 21 and the second terminal 22 are both located within the housing 10, and the first terminal 21 and the second terminal 22 are respectively located on the same side of the housing 10, as shown. Figure 1 As shown, the first terminal 21 and the second terminal 22 are both located at the lower part of the housing 10. The circuit breaker can be plugged into the busbar 200 in the distribution box 300 through the first terminal 21 and the second terminal 22.

[0043] In this configuration, one of the first terminal 21 and the second terminal 22 is an incoming terminal, and the other is an outgoing terminal. For example, the first terminal 21 can be an incoming terminal and the second terminal 22 can be an outgoing terminal; or, the first terminal 21 can be an outgoing terminal and the second terminal 22 can be an incoming terminal.

[0044] The aforementioned signal port 30 is used for electrical connection with an external terminal, transmitting the circuit breaker's opening or closing signal to the external terminal. In this embodiment, the signal port 30 is located on the side of the housing 10 opposite to the first terminal 21. That is, if the first terminal 21 and the second terminal 22 are located on one side of the housing 10, then the signal port 30 is located on the opposite side of the housing 10. Figure 1 As shown, the first terminal 21 and the second terminal 22 are located at the lower part of the housing 10, while the signal port 30 is located at the upper part of the housing 10.

[0045] Furthermore, the operating mechanism 40 is connected to the moving contact 61 of the circuit breaker via a transmission connection. Thus, by driving the operating mechanism 40, the moving contact 61 can be moved to act on the stationary contact 62 of the circuit breaker to close the circuit; or, by driving the operating mechanism 40, the moving contact 61 can be moved away from the stationary contact 62 of the circuit breaker to open the circuit. This application does not limit the specific structure of the operating mechanism 40; those skilled in the art can design it according to actual conditions.

[0046] After receiving the trip signal, the electromagnetic trip unit 50 extends its drive end and acts on the operating mechanism 40, thereby causing the operating mechanism 40 to move and drive the moving contact 61 away from the stationary contact 62 to open the circuit. In this embodiment, the driving direction of the electromagnetic trip unit 50 is set at an acute angle to the arrangement direction of the first terminal 21 and the second terminal 22.

[0047] It should be noted that the driving direction of the electromagnetic trip unit 50 is the same as its orientation within the housing 10. For example... Figure 1 As shown, the first terminal 21 and the second terminal 22 are arranged horizontally, and the electromagnetic trip unit 50 is placed at an acute angle to the horizontal direction (i.e., Figure 1 and Figure 2 The first angle θ is shown. In short, the electromagnetic trip unit 50 is placed at an angle inside the housing 10. By placing the electromagnetic trip unit 50 at an angle inside the housing 10, the operating mechanism 40 can be positioned towards the lower part of the housing 10 according to the placement position of the electromagnetic trip unit 50, thereby making the layout of the internal components of the circuit breaker more compact and improving space utilization.

[0048] In summary, the circuit breaker provided in this application includes a housing 10 and a first terminal 21, a second terminal 22, a signal port 30, an operating mechanism 40, and an electromagnetic trip unit 50 respectively disposed on the housing 10. When the electromagnetic trip unit 50 receives a trip signal, it can drive the operating mechanism 40 to move so that the circuit breaker is tripped. The first terminal 21 and the second terminal 22 are respectively disposed on the same side of the housing 10 and are spaced apart. The circuit breaker can be plugged into the busbar 200 of the distribution box 300 through the first terminal 21 and the second terminal 22. The signal port 30 is disposed on the side of the housing 10 opposite to the second terminal 22. The driving direction of the electromagnetic trip unit 50 is set at an acute angle to the arrangement direction of the first terminal 21 and the second terminal 22. This application arranges the first terminal 21 and the second terminal 22 on the same side of the housing 10, arranges the signal port 30 on the side of the housing 10 opposite to the first terminal 21, and sets the driving direction of the electromagnetic trip unit 50 at an acute angle to the arrangement direction of the first terminal 21 and the second terminal 22. In this way, the operating mechanism 40 can move towards the side of the housing 10 away from the signal port 30 according to the position of the electromagnetic trip unit 50, thereby making the layout of the internal components of the circuit breaker more compact and solving the problem of large size and insufficient space utilization of the circuit breaker in the prior art.

[0049] In this embodiment, optionally, the operating mechanism 40 is located inside the housing 10, and on the side of the housing 10 closest to the first terminal 21. Corresponding to... Figure 1 and Figure 2 In this configuration, the operating mechanism 40 is located on the right side of the housing 10. Optionally, the extending direction of the operating mechanism 40 may be perpendicular to the driving direction of the electromagnetic trip unit 50.

[0050] Optionally, in this embodiment, the circuit breaker further includes an arc-extinguishing chamber 70 located within the housing 10. The arc-extinguishing chamber 70 is disposed between the first terminal 21 and the second terminal 22, and the distance from the arc-extinguishing chamber 70 to the second terminal 22 is less than the distance from the arc-extinguishing chamber 70 to the first terminal 21. An electromagnetic trip unit 50 is located on the side of the arc-extinguishing chamber 70 closer to the signal port 30, and the drive end of the electromagnetic trip unit 50 is positioned towards the first terminal 21. Thus, the arc-extinguishing chamber 70 is positioned close to the second terminal 22. This provides more space on the right side of the housing 10, facilitating the layout of the electromagnetic trip unit 50 and the operating mechanism 40 within the housing 10.

[0051] Optionally, the circuit breaker also includes a thermal trip unit 80 disposed within the housing 10. The thermal trip unit 80 is located on the side of the housing 10 near the first terminal 21. The thermal trip unit 80 is used to drive the operating mechanism 40 to move so as to open the circuit breaker. The thermal trip unit 80 is used to deform under heat to drive the circuit breaker to open. This application does not specifically limit the tripping method of the thermal trip unit 80, and those skilled in the art can set it themselves.

[0052] To facilitate users in obtaining the open or closed status of the circuit breaker, in this embodiment, please refer to the reference... Figure 3 The circuit breaker also includes a status indicator window 91, which can alternately display two different indicators: one indicator to indicate that the circuit breaker is in the open state and the other indicator to indicate that the circuit breaker is in the closed state. The status indicator window 91 and the signal port 30 are located on the same side of the housing 10.

[0053] In other words, when the circuit breaker is in the open state, the status indicator window 91 can display one indicator; when the circuit breaker is in the closed state, the status indicator window 91 can display a different indicator. In this way, the user can know the current status of the circuit breaker by looking at the indicator in the status indicator window 91.

[0054] For example, the aforementioned indicator may be a light signal indicator or a mechanical indicator.

[0055] For example, when the indicator is a light signal, the status indicator window 91 can alternately display two different colors of light indicators. For example, red light is displayed when the circuit is closed, and green light is displayed when the circuit is open. It should be understood that displaying one color of light when the circuit is open and another color of light when the circuit is closed is only an example. In other embodiments, there may be no light signal indicator when the circuit is open and a light signal indicator when the circuit is closed, etc. Those skilled in the art can choose according to the actual situation, and this application does not impose any restrictions.

[0056] When the indicator is a mechanical indicator, the status indicator window 91 can display one type of structure when the circuit breaker is in the open state; and display a different type of structure when the circuit breaker is in the closed state. For example, a protrusion may appear in the status indicator window 91 when the circuit breaker is closed; and no corresponding protrusion may appear in the status indicator window 91 when the circuit breaker is open. Of course, this is only an example, and those skilled in the art can set the corresponding structural forms for the closed and open states themselves.

[0057] Alternatively, when the indicator is a mechanical indicator, one type of paint can be applied to the structure corresponding to the open state when the circuit breaker is in the open state; and another type of paint can be applied to the structure corresponding to the closed state when the circuit breaker is in the closed state, so that users can distinguish between the open and closed states.

[0058] In this embodiment, when the indicator is a light signal indicator, an indicator light can be installed in the status indicator window 91. In one embodiment, the indicator light can be powered by an independent power supply; in another embodiment, the indicator light can be powered by a signal port 30, which can draw power from the panel of the power distribution box 300.

[0059] Optionally, when the circuit breaker is closed, the indicator light does not illuminate; when the circuit breaker is open, the handle 92 returns to its initial state, which can connect the circuit containing the indicator light, and the indicator light illuminates.

[0060] Please refer to the reference again. Figure 2 and Figure 3 In this embodiment, the circuit breaker also includes a handle 92 movably connected to the housing 10. The handle 92 is used to drive the operating mechanism 40 to move so that the circuit breaker is opened or closed. The handle 92 and the signal port 30 are located on the same side of the housing 10.

[0061] The signal port 30 can be located on the left or right side of the handle 92, and this application does not impose any restrictions.

[0062] For example, the status indicator window 91 and signal port 30 described above can be located on the same side of the handle 92, such as... Figure 2 As shown. Of course, in other embodiments, the status indicator window 91 and the signal port 30 may be respectively located on opposite sides of the handle 92.

[0063] In this embodiment, please refer to Figure 4 As shown, when the circuit breaker is in the closed state, the side of the handle 92 facing away from the first terminal 21 is flush with the side of the housing 10 facing away from the first terminal 21. That is, the upper surface of the handle 92 and the upper surface of the housing 10 are flush. Figure 4 It should be understood that the directions mentioned in this application, such as up, down, left, and right, are for ease of understanding and description, and are described with reference to the directions shown in the illustrations. They should not be regarded as limitations on this application.

[0064] When the circuit breaker is in the closed state, the upper surface of the handle 92 is flush with the upper surface of the housing 10. This makes the circuit breaker structure more compact and reduces its size. It also makes it easier for users to judge the current status of the circuit breaker based on the positional relationship of the handle 92 relative to the housing 10, thus achieving the effect of status indication.

[0065] Please refer to the reference again. Figure 5 and Figure 6 In this embodiment, the circuit breaker also includes two protective plates 93 protruding from the housing 10. The two protective plates 93 are distributed on opposite sides of the handle 92 along a first direction, which is perpendicular to the arrangement direction of the signal port 30 and the handle 92.

[0066] It should be noted that the two protective plates 93 and the handle 92 are located on the same side of the housing 10, and the two protective plates 93 are distributed along the first direction on opposite sides of the handle 92. In this way, the two protective plates 93 can protect the handle 92 to a certain extent and prevent the handle 92 from being accidentally operated.

[0067] Please refer to Figure 6 As shown, the circuit breaker provided in this application also includes a handle 94 connected to the handle 92 or the housing 10, and pulling the handle 94 can pull the circuit breaker out of the distribution box 300.

[0068] For example, in one embodiment, a handle 94 is attached to the housing 10. This allows the user to pull the circuit breaker out of the distribution box 300 by pulling the handle 94, facilitating the removal of the circuit breaker within the distribution box 300. Alternatively, when the circuit breaker is equipped with a protective plate 93, the handle 94 can also be attached to the protective plate 93.

[0069] For example, in another embodiment, handle 94 is connected to handle 92. In this case, the user can pull the circuit breaker out of the distribution box 300 and also trip the circuit breaker by pulling handle 94.

[0070] Please refer to Figures 7 to 9 To prevent the circuit breaker from being inserted backwards onto the busbar 200 inside the distribution box 300, the first terminal 21 and the second terminal 22 may optionally be arranged asymmetrically relative to the central axis of the housing 10.

[0071] It should be understood that since the circuit breaker is plugged into the busbar 200 inside the distribution box 300 via the first terminal 21 and the second terminal 22, the circuit breaker housing 10 should also have a first insertion hole 11 corresponding to the first terminal 21 and a second insertion hole 12 corresponding to the second terminal 22. The first terminal 21 and the second terminal 22 are asymmetrically arranged relative to the central axis of the housing 10, indicating that the first insertion hole 11 and the second insertion hole 12 are also asymmetrically arranged relative to the central axis of the housing 10.

[0072] For example, in one embodiment, such as Figure 7 As shown, the first insertion hole 11 and the second insertion hole 12 have the same shape, and the distance from the first insertion hole 11 to the central axis of the housing 10 (hereinafter referred to as the first distance a1) and the distance from the second insertion hole 12 to the central axis of the housing 10 (hereinafter referred to as the second distance a2) are different. It should be noted that the first distance a1 can be less than the second distance a2, or the second distance a2 can be less than the first distance a1; this application does not impose any restrictions.

[0073] For example, in another embodiment, the first socket 11 and the second socket 12 have the same shape, but the sizes of the first socket 11 and the second socket 12 are different. For example, as Figure 8As shown, both the first insertion hole 11 and the second insertion hole 12 can be strip-shaped holes, but the length of the strip-shaped hole of the first insertion hole 11 (hereinafter referred to as the first length b1) and the length of the strip-shaped hole of the second insertion hole 12 (hereinafter referred to as the second length b2) are different. For example, the first length b1 can be greater than the second length b2, or the second length b2 can be greater than the first length b1; this application does not impose any restrictions. For another example, if both the first insertion hole 11 and the second insertion hole 12 are circular holes, the diameter of the first insertion hole 11 and the diameter of the second insertion hole 12 can be different, thus achieving the effect of preventing reverse insertion.

[0074] For example, in yet another embodiment, such as Figure 9 As shown, both the first insertion hole 11 and the second insertion hole 12 can be strip-shaped holes, and the extending directions of the two strip-shaped holes are intersecting. For example, it can be as follows: Figure 9 As shown, the first insertion hole 11 and the second insertion hole 12 extend in a perpendicular direction.

[0075] Please refer to the reference again. Figure 10 As shown, optionally, the circuit breaker also includes an accessory 95 adjacent to the housing 10, the accessory 95 having a residual current trip unit that is driven to operate the mechanism 40; when a leakage fault occurs at the load end, the residual current trip unit can drive the operating mechanism 40 to open the circuit; the accessory 95 has a leakage test button 96, the leakage test button 96 and the signal port 30 are located on the same side of the housing 10.

[0076] The aforementioned leakage current test button 96 is used to test whether the leakage current protection function of the circuit breaker is intact. Specifically, when a leakage current fault occurs at the load end, this application does not limit the specific form in which the operating mechanism 40 is driven to trip via the leakage current trip unit.

[0077] In this embodiment, the leakage test button 96 and the handle 92 are located on the same side of the housing 10, which makes it convenient for the user to operate the leakage test button 96.

[0078] It should be noted that when the circuit breaker includes accessory 95, accessory 95 may also be provided with two terminals. The two terminals on accessory 95 are electrically isolated from the first terminal 21 and the second terminal 22.

[0079] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0080] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

Claims

1. A circuit breaker, characterized in that, It includes a housing and a first terminal, a second terminal, a signal port, an operating mechanism, and an electromagnetic trip unit respectively disposed on the housing; when the electromagnetic trip unit receives a trip signal, it can drive the operating mechanism to move so that the circuit breaker is tripped; The first terminal and the second terminal are respectively located on the same side of the housing and are spaced apart. The circuit breaker can be plugged into the busbar of the distribution box through the first terminal and the second terminal. The signal port is located on the side of the housing opposite to the second terminal. The driving direction of the electromagnetic trip unit is set at an acute angle to the arrangement direction of the first terminal and the second terminal. The length direction of the housing is the direction of the line connecting the first terminal and the second terminal, the height direction of the housing is the direction from the signal port toward the second terminal, the housing is square, and the length of the housing is greater than the height of the housing; The operating mechanism is located inside the housing and on the side of the housing closest to the first terminal; The circuit breaker further includes an arc-extinguishing chamber located within the housing, the arc-extinguishing chamber being disposed between the first terminal and the second terminal, and the distance from the arc-extinguishing chamber to the second terminal being less than the distance from the arc-extinguishing chamber to the first terminal; The electromagnetic trip unit is located on the side of the arc-extinguishing chamber near the signal port, and the drive end of the electromagnetic trip unit is oriented toward the first terminal.

2. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a thermal trip unit disposed within the housing. The thermal trip unit is located on the side of the housing near the first terminal and is used to drive the operating mechanism to move so that the circuit breaker trips.

3. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a status indicator window, which can alternately display two different indicator symbols: one indicator symbol indicates that the circuit breaker is in the open state, and the other indicator symbol indicates that the circuit breaker is in the closed state; the status indicator window and the signal port are located on the same side of the housing.

4. The circuit breaker according to claim 3, characterized in that, The indicator can be an optical signal indicator or a mechanical indicator.

5. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a handle movably connected to the housing, the handle being used to drive the operating mechanism to open or close the circuit breaker, and the handle and the signal port being located on the same side of the housing.

6. The circuit breaker according to claim 5, characterized in that, When the circuit breaker is in the closed state, the side of the handle away from the first terminal is flush with the side of the housing away from the first terminal.

7. The circuit breaker according to claim 5, characterized in that, The circuit breaker also includes two protective plates protruding from the housing, the two protective plates being distributed on opposite sides of the handle along a first direction, the first direction being perpendicular to the arrangement direction of the signal port and the handle.

8. The circuit breaker according to claim 5, characterized in that, The circuit breaker also includes a handle connected to the handle or the housing, which can be pulled out of the distribution box by pulling the handle.

9. The circuit breaker according to claim 5, characterized in that, The first terminal and the second terminal are arranged asymmetrically with respect to the central axis of the housing.

10. The circuit breaker according to any one of claims 1 to 9, characterized in that, The circuit breaker also includes an accessory adjacent to the housing, the accessory having a residual current trip unit that is kinetically connected to the operating mechanism; when a leakage fault occurs at the load end, the residual current trip unit can drive the operating mechanism to open the circuit; the accessory has a leakage test button, the leakage test button and the signal port being located on the same side of the housing.

Images