Base of molded case circuit breaker and molded case circuit breaker

Abstract

The utility model relates to the technical field of electrical connection devices, in particular to a base of a molded case circuit breaker and the molded case circuit breaker. The utility model provides a base of a molded case circuit breaker. The base comprises a bottom plate, a first side plate and a second side plate, the first side plate and the second side plate are oppositely arranged on the bottom plate in the first direction. In the second direction, at least one end of the bottom plate is provided with a wiring end placing surface. In the first direction, the wiring end placing face is located in the area between the first side plate and the second side plate, at least one of the first side plate and the second side plate is provided with a wiring notch, the bottom face of the wiring notch and the wiring end placing face are located on the same plane, and the bottom face of the wiring notch and the wiring end placing face form an expansion placing face. And the extended placement surface is used for fixing a wiring end conductor of the molded case circuit breaker. When the base of the molded case circuit breaker provided by the utility model is used for the molded case circuit breaker, the temperature rise at the wiring end can be reduced, the current-carrying capacity of the conductor at the wiring end is improved, and the realization of the small size of the molded case circuit breaker is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical connection devices, in particular to a base of a molded case circuit breaker and the molded case circuit breaker. BACKGROUND

[0002] The molded case circuit breaker is a common circuit protection device, which is applied in new energy fields such as photovoltaic and energy storage, and is mainly used for controlling and protecting circuits from electrical faults such as overload, short circuit and undervoltage.

[0003] With the strong support of national policies, the fields of photovoltaic and energy storage are experiencing rapid development, and market competition is becoming increasingly fierce. Under this environment, higher requirements are put forward for molded case circuit breakers, that is, to achieve smaller size and better performance.

[0004] The existing molded case circuit breaker has defects of unreliable wiring terminal contact and high temperature rise. INVENTION CONTENTS

[0005] The present application provides a base of a molded case circuit breaker and the molded case circuit breaker, which can improve the wiring capacity of the molded case circuit breaker, improve the wiring reliability, and improve the temperature rise.

[0006] The technical solution of the present application is as follows:

[0007] In a first aspect, the present application provides a base of a molded case circuit breaker, which includes a bottom plate, a first side plate and a second side plate. Along a first direction, the first side plate and the second side plate are oppositely arranged on the bottom plate. Along a second direction, at least one end of the bottom plate is provided with a wiring terminal placement surface, and the second direction is perpendicular to the first direction.

[0008] Along the first direction, the wiring terminal placement surface is located in the region between the first side plate and the second side plate, at least one of the first side plate and the second side plate is provided with a wiring gap, the bottom surface of the wiring gap is connected with the wiring terminal placement surface, and the bottom surface of the wiring gap and the wiring terminal placement surface are located in the same plane. The bottom surface of the wiring gap and the wiring terminal placement surface form an extended placement surface. The extended placement surface is used to fix the wiring terminal conductor of the molded case circuit breaker.

[0009] In a second aspect, based on the same inventive concept, the present application further provides a molded case circuit breaker, which includes a base and a wiring terminal conductor.

[0010] The base includes a bottom plate, a first side plate and a second side plate. Along a first direction, the first side plate and the second side plate are oppositely arranged on the bottom plate. Along a second direction, at least one end of the bottom plate is provided with a wiring terminal placement surface, and the second direction is perpendicular to the first direction.

[0011] In the first direction, the terminal placement surface is located in a region between the first side plate and the second side plate, at least one of the first side plate and the second side plate is provided with a terminal gap, a bottom surface of the terminal gap is connected with the terminal placement surface, and the bottom surface of the terminal gap and the terminal placement surface are located in the same plane, and the bottom surface of the terminal gap and the terminal placement surface form an extended placement surface.

[0012] The terminal conductor is fixed at the extended placement surface, and the size of the terminal conductor is matched with the area of the extended placement surface.

[0013] The base of the molded case circuit breaker provided in the application, when used for the molded case circuit breaker, because the bottom surface of the terminal gap and the terminal placement surface are located in the same plane, it is equivalent to extending the area of the terminal placement surface. When the base of the molded case circuit breaker with this structure is used for the molded case circuit breaker, it can help reduce the temperature rise at the terminal placement surface.

[0014] In addition, because the area of the terminal placement surface is increased, the size of the first terminal conductor and the second terminal conductor can also be increased accordingly, so as to help improve the current carrying capacity of the first terminal conductor and the second terminal conductor.

[0015] Generally speaking, the larger the working current of the molded case circuit breaker is, the larger the volume of the molded case circuit breaker is. The base of the molded case circuit breaker and the molded case circuit breaker provided in the application help improve the current carrying capacity of the first terminal conductor and the second terminal conductor, thereby helping to reduce the volume of the molded case circuit breaker.

[0016] In addition, because the first side plate and / or the second side plate are provided with a gap leading to the terminal placement surface, when external wiring of the molded case circuit breaker is performed, the external connection line can be connected to the molded case circuit breaker from one end of the base in the first direction, or from one side of the base in the second direction, so as to improve the flexibility of external wiring of the molded case circuit breaker, and facilitate installation of the molded case circuit breaker. In some cases, the base of the molded case circuit breaker provided in the application can save the material of the external connection line.

[0017] In a possible design, the extended placement surface is provided with a fixing hole, and in the first direction, the fixing hole is centrally arranged at the extended placement surface.

[0018] The terminal conductor is provided with a connecting hole, and in the first direction, the connecting hole is centrally arranged on the terminal conductor. The fixing hole is coaxial with the connecting hole.

[0019] Based on the base of the molded case circuit breaker and the molded case circuit breaker provided in this embodiment, in the first direction, the fixing hole is centrally arranged at the extended placement surface, and the connecting hole is centrally arranged on the terminal conductor. The fixing hole is coaxial with the connecting hole. In this way, it is convenient for the standard terminal nose to make wiring in the first direction.

[0020] In a possible design, the wiring gap is in the form of a rectangular slot. Alternatively, at least one of the first side plate and the second side plate is provided with a default wiring end placement surface corresponding to the wiring end placement surface, and the wiring gap is an open gap.

[0021] Based on the base of the molded case circuit breaker and the molded case circuit breaker provided in the embodiment, in some cases, the external connecting wire of the movable contact assembly or the stationary contact is a conductive bar. At this time, the rectangular slot-shaped wiring gap is more easily matched with the conductive bar. The conductive bar can be fixedly connected with the connecting end of the movable contact assembly or the connecting end of the stationary contact at the wiring end placement surface by extending into the wiring end placement surface through the wiring gap. The rectangular slot-shaped wiring gap can position the conductive bar, so as to facilitate the fixed connection of the conductive bar.

[0022] In a possible design, the base of the molded case circuit breaker includes n partitions, where n is an integer less than or equal to 3.

[0023] In the first direction, the n partitions are arranged between the first side plate and the second side plate, and the partitions are connected with the bottom plate.

[0024] Among the first side plate, the partitions, and the second side plate, two adjacent ones and the bottom plate form a mounting area.

[0025] The wiring end placement surfaces in the adjacent mounting areas are separated by the partitions.

[0026] Based on the base of the molded case circuit breaker and the molded case circuit breaker provided in the embodiment, the wiring end placement surfaces in the adjacent mounting areas are separated by the partitions. Thus, when the molded case circuit breaker is working, especially when the loop current in the molded case circuit breaker is large, the wiring end placement surfaces in the adjacent mounting areas are separated by the partitions. Thus, the mutual influence between different phase currents in the molded case circuit breaker is reduced, and the creepage distance is increased. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 shows a structure of a base of a molded case circuit breaker according to an embodiment of the present application.

[0028] Figure 2 FIG. 1 shows a structure of a base of a molded case circuit breaker according to an embodiment of the present application.

[0029] Figure 3 FIG. 1 shows a structure of a base of a molded case circuit breaker according to an embodiment of the present application.

[0030] Figure 4 FIG. 1 shows a structure of a molded case circuit breaker according to an embodiment of the present application.

[0031] Figure 5Another structure schematic view of a molded case circuit breaker provided by the embodiment of the present application is shown.

[0032] Figure 6 A structure schematic view of a first terminal conductor of a moving contact assembly provided by the embodiment of the present application is shown.

[0033] Figure 7 A structure schematic view of a stationary contact provided by the embodiment of the present application is shown.

[0034] Figure 8 Another structure schematic view of a first terminal conductor of a moving contact assembly provided by the embodiment of the present application is shown.

[0035] Figure 9 Another structure schematic view of a first terminal conductor of a moving contact assembly provided by the embodiment of the present application is shown.

[0036] The prior art reference signs are:

[0037] 1', base; 11', bottom plate; 111', terminal placing surface; 12', first side plate; 13', second side plate; 14', partition plate; D1', first direction; D2', second direction;

[0038] The reference signs in the embodiment of the present application are:

[0039] 1, base; 11, bottom plate; 111, terminal placing surface; 112, fixing hole; 12, first side plate; 13, second side plate; 121, terminal notch; 1211, bottom surface of the terminal notch; 14, partition plate;

[0040] 2, moving contact assembly; 21, moving contact; 22, first terminal conductor; 221, first connecting hole;

[0041] 3, stationary contact; 31, second terminal conductor; 311, second connecting hole; D1, first direction; D2, second direction. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. All publications, patent applications, patents, and other references mentioned herein are incorporated by reference in their entirety.

[0044] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated in to another embodiment.

[0045] The term "and / or", merely describes association between associated objects, and means that there can be three kinds of relations, for example, A and / or B, can mean that A exists, A and B exist, and B exists. In addition, the character " / " herein generally means that the front and rear associated objects are a "or" relationship.

[0046] In addition, the terms "first", "second", and so on in the description and claims of the application or the above drawings are used to distinguish different objects, and are not used to describe a specific order, and can explicitly or implicitly include one or more of the features.

[0047] In the description of the application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, the "connection" or "connecting" of mechanical structure can mean physical connection, for example, the physical connection can be fixed connection, for example, fixed connection through a spacer, for example, fixed connection through screws, bolts or other spacers. The physical connection can also be detachable connection, for example, mutual clamping or clamping connection. The physical connection can also be integrally connected, for example, welding, bonding or integrally formed connection. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0048] The following will describe the application in detail from the prior art.

[0049] Figure 1 A structure schematic diagram of a base of a three-phase molded case circuit breaker in the prior art is shown, please refer to Figure 1The base 1′ of the molded case circuit breaker includes a base plate 11′, a first side plate 12′, a second side plate 13′, and two partition plates 14′. Along a first direction D1′, the first side plate 12′ and the second side plate 13′ are positioned opposite each other on the base plate 11′. The two partition plates 14′ are located between the first side plate 12′ and the second side plate 13′ and are connected to the base plate 11′. The first side plate 12′, the two partition plates 14′, the second side plate 13′, and the base plate 11′ form three mounting areas arranged along the first direction D1′.

[0050] For each installation area, along the second direction D2′, the base plate 11′ has terminal placement surfaces 111′ at both ends. One terminal placement surface 111′ is used to fix the incoming terminal conductor, and the other terminal placement surface 111′ is used to fix the outgoing terminal conductor.

[0051] Currently, molded case circuit breakers are developing towards smaller sizes. In some molded case circuit breakers, the area of ​​the terminal placement surface 111' on the base 1' is small. The incoming terminal conductor and / or outgoing terminal conductor are also smaller in size due to the influence of the terminal placement surface 111', which can easily lead to insufficient wiring capacity and high temperature rise at the wiring point.

[0052] In view of this, this application provides a base for a molded case circuit breaker. Figure 2 The diagram shown is a structural schematic of the base of a molded case circuit breaker provided in an embodiment of this application. Figure 3 The diagram shown is a schematic diagram of another structure of the base of a molded case circuit breaker provided in an embodiment of this application.

[0053] Please refer to Figure 2 and Figure 3 The base 1 of the molded case circuit breaker provided in this application includes a base plate 11, a first side plate 12, and a second side plate 13. Along a first direction D1, the first side plate 12 and the second side plate 13 are disposed opposite to each other on the base plate 11. Along a second direction D2, at least one end of the base plate 11 is provided with a terminal placement surface 111, and the second direction D2 is perpendicular to the first direction D1.

[0054] Along the first direction D1, the terminal placement surface 111 is located in the area between the first side plate 12 and the second side plate 13. At least one of the first side plate 12 and the second side plate 13 is provided with a wiring notch 121. The bottom surface of the wiring notch 121 is connected to the terminal placement surface 111, and the bottom surface of the wiring notch 121 and the terminal placement surface 111 are located on the same plane. The bottom surface of the wiring notch 121 and the terminal placement surface 111 form an extended placement surface. The extended placement surface is used to fix the terminal conductors of the molded case circuit breaker.

[0055] Based on the same inventive concept, this application also provides a molded case circuit breaker using the aforementioned base 1. Figure 4Fig. 1 shows a structural schematic diagram of a molded case circuit breaker according to an embodiment of the present application, Figure 5 Fig. 2 shows a structural schematic diagram of another molded case circuit breaker according to an embodiment of the present application.

[0056] Please refer to Figure 2 and Figure 4 , or refer to Figure 3 and Figure 5 , the molded case circuit breaker provided by the present application comprises a base 1 and a terminal conductor.

[0057] The base 1 comprises a bottom plate 11, a first side plate 12 and a second side plate 13. Along a first direction D1, the first side plate 12 and the second side plate 13 are oppositely arranged on the bottom plate 11. Along a second direction D2, at least one end of the bottom plate 11 is provided with a terminal placement surface 111, and the second direction D2 is perpendicular to the first direction D1.

[0058] Along the first direction D1, the terminal placement surface 111 is located in the region between the first side plate 12 and the second side plate 13, and at least one of the first side plate 12 and the second side plate 13 is provided with a terminal gap 121, the bottom surface of the terminal gap 121 is connected with the terminal placement surface 111, and the bottom surface of the terminal gap 121 and the terminal placement surface 111 are located in the same plane, and the bottom surface of the terminal gap 121 and the terminal placement surface 111 form an extended placement surface. The terminal conductor is fixed at the extended placement surface, and the size of the terminal conductor is adapted to the area of the extended placement surface.

[0059] Specifically, please continue to refer to Figure 4 and Figure 5 , in some embodiments of the present application, the molded case circuit breaker is a three-phase molded case circuit breaker, and the base 1 of the molded case circuit breaker comprises three mounting areas, each mounting area is provided with a group of contact structures, each group of contact structures comprises a movable contact assembly 2 and a static contact 3 which can be contacted and separated with each other, wherein the movable contact assembly 2 comprises a movable contact 21 and a first terminal conductor 22, and the static contact 3 comprises a second terminal conductor 31. In some embodiments of the present application, when the molded case circuit breaker is powered on, the first terminal conductor 22 is a line-in terminal conductor, and the second terminal conductor 31 is a line-out terminal conductor. When the molded case circuit breaker is closed, the current flows into the contact structure from the first terminal conductor 22 and flows out of the contact structure from the second terminal conductor 31.

[0060] Generally, the first terminal conductor 22 and the second terminal conductor 31 are electrically connected with external connecting wires, thereby forming a current loop.

[0061] In the present application, the terminal conductor can refer to the first terminal conductor 22 in the movable contact assembly 2, or refer to the second terminal conductor 31 in the static contact 3.

[0062] In the present application, the terminal placement surface 111 refers to the mounting surface on the bottom plate 11 of the base 1 for placing the terminal conductor.

[0063] Please continue to combine Figure 2 With Figure 4 , or Figure 3 With Figure 5 , one of the innovations of the present application is that the structure of the base 1 is changed, specifically by providing a wiring gap 121 at the first side plate 12 of the base 1, or providing a wiring gap 121 at the second side plate 13 of the base 1, or providing a wiring gap 121 at both the first side plate 12 and the second side plate 13 of the base 1, and the bottom surface of the wiring gap 121 is connected with the terminal placement surface 111 and located in the same plane, so as to expand the area of the terminal placement surface 111 and form an expanded placement surface.

[0064] In order to adapt to the innovative structure of the base 1, the terminal conductor of the present application also has corresponding changes, which is that the terminal conductor is adapted to the expanded placement surface.

[0065] Please continue to refer to Figure 4 With Figure 5 In the present application, the intuitive manifestation that the terminal conductor is adapted to the expanded placement surface is that along the first direction D1, the terminal conductor extends towards the first side plate 12 or the second side plate 13, and the size of the terminal conductor in the first direction D1 increases.

[0066] Please continue to refer to Figure 4 With Figure 5 When the base 1 provided by the present application is used for a molded case circuit breaker, in some embodiments, the first terminal conductor 22 of the movable contact assembly 2 is connected at the terminal placement surface 111 at one end of the bottom plate 11, and the shape of the first terminal conductor 22 is adapted to the expanded placement surface. Then, when the area of the terminal placement surface 111 increases, correspondingly, the size of the connection between the first terminal conductor 22 and the terminal placement surface 111 can also be set to be larger. Similarly, the size of the terminal of the external connecting wire of the movable contact assembly 2 can also be enlarged correspondingly. In this way, the contact area between the first terminal conductor 22 and the external connecting wire at the terminal placement surface 111 will increase correspondingly, which helps to reduce the contact resistance between the first terminal conductor 22 and the external connecting wire, and further reduces the temperature rise at the connection between the first terminal conductor 22 and the external connecting wire.

[0067] Based on similar reasons, when the base 1 is used for the molded case circuit breaker, in some embodiments, the second terminal conductor 31 of the static contact 3 is connected to the terminal placement surface 111 at the other end of the base 1, and the shape of the second terminal conductor 31 is adapted to the extended placement surface, so that when the area of the terminal placement surface 111 is increased, the size of the connection between the second terminal conductor 31 and the terminal placement surface 111 can also be set to be larger. Similarly, the size of the terminal of the external connecting line of the static contact 3 can also be enlarged accordingly. In this way, the contact area between the second terminal conductor 31 and the external connecting line at the terminal placement surface 111 is increased accordingly, which helps to reduce the contact resistance between the static contact 3 and the external connecting line, and further reduces the temperature rise at the connection between the static contact 3 and the external connecting line.

[0068] In summary, based on the base 1 provided by the embodiment, since the bottom surface 1211 of the terminal gap and the terminal placement surface 111 are located in the same plane, the area of the terminal placement surface 111 is equivalent to being extended. When the base 1 of this structure is used for the molded case circuit breaker, it can help to reduce the temperature rise at the terminal placement surface 111.

[0069] In addition, since the area of the terminal placement surface 111 is increased, the size of the first terminal conductor 22 and the second terminal conductor 31 can also be increased accordingly, which helps to improve the current carrying capacity of the first terminal conductor 22 and the second terminal conductor 31.

[0070] Generally speaking, the larger the working current of the molded case circuit breaker, the larger the volume of the molded case circuit breaker. The base 1 and the molded case circuit breaker provided by the application help to improve the current carrying capacity of the first terminal conductor 22 and the second terminal conductor 31, and further help to reduce the volume of the molded case circuit breaker.

[0071] In addition, the base 1 provided by the application has a gap on the first side plate 12 and / or the second side plate 13 leading to the terminal placement surface 111, so that when the external wiring of the molded case circuit breaker is performed, the external connecting line can be connected to the molded case circuit breaker from one end of the first direction D1 of the base 1 or from one side of the second direction D2 of the base 1, which improves the flexibility of the external wiring of the molded case circuit breaker, facilitates the installation of the molded case circuit breaker, and also saves materials.

[0072] It should be noted that, Figure 2 and Figure 3 the base 1 shown in Figs. 1 to 5 is only two specific embodiments of the base 1 of the molded case circuit breaker of the application, Figure 4 and Figure 5 the molded case circuit breaker shown in Figs. 6 to 10 is also only two specific embodiments of the molded case circuit breaker of the application, Figures 2 to 5The structure shown is only to illustrate the innovations of the present application and does not limit the protection scope of the present application.

[0073] It can be understood that, in some embodiments of the present application, along the second direction D2, only one end of the bottom plate 11 is provided with the terminal placing surface 111, and the external connecting wires of the movable contact assembly 2 and the movable contact 21 can be connected at the terminal placing surface 111.

[0074] It can be understood that, in some embodiments of the present application, along the second direction D2, only the other end of the bottom plate 11 is provided with the terminal placing surface 111, and the external connecting wires of the static contact 3 and the static contact 3 can be connected at the terminal placing surface 111.

[0075] It can be understood that, in some embodiments of the present application, along the second direction D2, both ends of the bottom plate 11 are provided with the terminal placing surface 111, and the external connecting wires of the movable contact assembly 2 and the movable contact 21 can be connected at the terminal placing surface 111 of one end of the bottom plate 11, and the external connecting wires of the static contact 3 and the static contact 3 can be connected at the terminal placing surface 111 of the other end of the bottom plate 11.

[0076] It can be understood that, in some embodiments of the present application, only the first side plate 12 is provided with the terminal placing surface 111.

[0077] It can be understood that, in some embodiments of the present application, only the second side plate 13 is provided with the terminal placing surface 111.

[0078] It can be understood that, in some embodiments of the present application, both the first side plate 12 and the second side plate 13 are provided with the terminal placing surface 111.

[0079] It can also be understood that, Figures 2 to 5 The related structure of the three-phase molded case circuit breaker is shown, but the base 1 and the molded case circuit breaker claimed in the present application are not only suitable for the three-phase molded case circuit breaker, but also suitable for the four-phase molded case circuit breaker, the two-phase molded case circuit breaker and the single-phase molded case circuit breaker, and the present application is not limited thereto.

[0080] It can also be understood that, for the single-phase molded case circuit breaker, the base is provided with an extended placing surface at the incoming wire end and / or the outgoing wire end.

[0081] For two-phase, three-phase or four-phase molded case circuit breaker, the molded case circuit breaker has two or more line-in terminals and two or more line-out terminals, then the base can be provided with an extended placement surface at one or more line-in terminals, or the base can be provided with an extended placement surface at one or more line-in terminals. Or the base can be provided with an extended placement surface at one or more line-in terminals, and the base can be provided with an extended placement surface at one or more line-in terminals.

[0082] Please refer to Figure 2 In some embodiments of the present application, the fixed hole 112 is provided at the extended placement surface, and the fixed hole 112 is centrally arranged at the extended placement surface along the first direction D1.

[0083] Figure 6 A structure diagram of a first wiring terminal conductor of a movable contact assembly provided by an embodiment of the present application is shown in Figure 2 and Figure 6 In some embodiments of the present application, when the base 1 of this structure is used for a molded case circuit breaker, the first wiring terminal conductor 22 is provided with a first connecting hole 221, the first connecting hole 221 is matched with the fixed hole 112, and the first connecting hole 221 is centrally arranged at the first wiring terminal conductor 22 along the first direction D1.

[0084] Figure 7 A structure diagram of a static contact provided by an embodiment of the present application is shown in Figure 2 and Figure 7 In some embodiments of the present application, when the base 1 of this structure is used for a molded case circuit breaker, the second wiring terminal conductor 31 of the static contact 3 is provided with a second connecting hole 311, the second connecting hole 311 is matched with the fixed hole 112, and the second connecting hole 311 is centrally arranged at the second wiring terminal conductor 31 along the first direction D1.

[0085] Please continue to refer to Figure 2 In some embodiments of the present application, the fixed hole 112 is arranged offset at the extended placement surface along the first direction D1.

[0086] Figure 8 Another structure diagram of a first wiring terminal conductor of a movable contact assembly provided by an embodiment of the present application is shown in Figure 2 and Figure 8 In some embodiments of the present application, when the base 1 of this structure is used for a molded case circuit breaker, the first wiring terminal conductor 22 is provided with a first connecting hole 221, the first connecting hole 221 is matched with the fixed hole 112, and the first connecting hole 221 is arranged offset at the first wiring terminal conductor 22 along the first direction D1.

[0087] Figure 9Another structure diagram of the first terminal conductor of the moving contact assembly provided in the embodiments of the present application is shown in FIG. 2B. As shown in FIG. 2B, the first terminal conductor of the moving contact assembly is provided with a first connecting hole 221 and a second connecting hole 311. The first connecting hole 221 is adapted to the fixed hole 112 and is arranged at the first terminal conductor 22 in the first direction D1. The second connecting hole 311 is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 2 In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 9 In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1.

[0088] In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 2 、 Figure 8 In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 9 When the external connecting wire connected at the terminal placement surface 111 of the molded case circuit breaker is connected from the second direction D2, the offset fixed hole 112 matches the offset first connecting hole 221 or the offset second connecting hole 311. Under certain conditions, both can meet the connection requirements of the external connecting wire. However, when the external connecting wire connected at the terminal placement surface 111 of the molded case circuit breaker is connected from the first direction D1, the offset fixed hole 112 may have an impact on the arrangement of the external connecting wire, especially when the terminal of the external connecting wire is a standard terminal nose.

[0089] In some embodiments of the present application, the fixed hole 112 is arranged centrally at the extended placement surface in the first direction D1. The first connecting hole 221 is arranged centrally at the first terminal conductor 22 in the first direction D1. The second connecting hole 311 is arranged centrally at the second terminal conductor 31 in the first direction D1. In this way, the standard terminal nose can be connected in the first direction D1.

[0090] In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 3 In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 5 In some embodiments of the present application, the terminal gap 121 is in the shape of a rectangular slot.

[0091] Specifically, in some cases, the external connecting wire of the moving contact assembly 2 or the stationary contact 3 is a conductive row. At this time, the terminal gap 121 in the shape of a rectangular slot is more easily adapted to the conductive row. The conductive row can extend into the terminal placement surface 111 through the terminal gap 121 and be fixedly connected to the connection end of the moving contact assembly 2 or the connection end of the stationary contact 3 at the terminal placement surface 111. The terminal gap 121 in the shape of a slot can position the conductive row. In this way, the fixed connection of the conductive row is facilitated.

[0092] It should be noted that in some other embodiments of the present application, the terminal gap 121 can also have other shapes, such as a circular shape, a waist shape, or other special shapes.

[0093] In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 2 In some embodiments of the present application, the base 1 of the structure is used for a molded case circuit breaker. The second terminal conductor 31 is provided with the second connecting hole 311 which is adapted to the fixed hole 112 and is arranged at the second terminal conductor 31 in the first direction D1. Figure 4In some embodiments of the application, at least one of the first side plate 12 and the second side plate 13 is absent at the position corresponding to the terminal placement surface 111, and the terminal gap 121 is an open gap.

[0094] Based on the base 1 provided by the embodiments, when the terminal gap 121 is an open gap, the blocking at the terminal placement surface 111 is less, so as to facilitate the wiring at the terminal placement surface 111.

[0095] Please continue to refer to Figure 2 With Figure 3 In some embodiments of the application, the base 1 includes n partitions 14, and n is an integer less than or equal to 3.

[0096] In the first direction D1, the n partitions 14 are arranged in sequence between the first side plate 12 and the second side plate 13, and the partitions 14 are connected to the bottom plate 11.

[0097] Among the first side plate 12, the partitions 14, and the second side plate 13, two adjacent ones and the bottom plate 11 form a mounting area.

[0098] The terminal placement surfaces 111 in adjacent mounting areas are separated by the partitions 14.

[0099] Specifically, the base 1 of the application can be a base of a single-phase molded case circuit breaker, a base of a two-phase molded case circuit breaker, a base of a three-phase molded case circuit breaker, or a base of a four-phase molded case circuit breaker.

[0100] When the base 1 of the application is used for a single-phase molded case circuit breaker, the number of partitions 14 in the base 1 is zero, and there is only one mounting area in the base 1.

[0101] When the base 1 of the application is used for a two-phase molded case circuit breaker, the number of partitions 14 in the base 1 is one, and two mounting areas are formed between the first side plate 12, the partition 14, the second side plate 13, and the bottom plate 11. The terminal placement surfaces 111 in the two mounting areas are separated by the partition 14.

[0102] When the base 1 of the application is used for a three-phase molded case circuit breaker, the number of partitions 14 in the base 1 is two, and three mounting areas are formed between the first side plate 12, the two partitions 14, and the second side plate 13. The terminal placement surfaces 111 in two adjacent mounting areas are separated by the partition 14.

[0103] When the base 1 of the application is used for a four-phase molded case circuit breaker, the number of partitions 14 in the base 1 is three, and four mounting areas are formed between the first side plate 12, the three partitions 14, and the second side plate 13. The terminal placement surfaces 111 in two adjacent mounting areas are separated by the partition 14.

[0104] In the present application, the terminal placing surfaces 111 in the adjacent installation areas are separated by the partition 14, so that when the molded case circuit breaker is working, especially when the loop current in the molded case circuit breaker is large, the terminal placing surfaces 111 in the adjacent installation areas are separated by the partition 14, so that the mutual influence between the different phase currents in the molded case circuit breaker is reduced, and the creepage distance is increased.

[0105] Those skilled in the art will appreciate that a combination of features of different embodiments means that it is within the scope of the present application and forms a different embodiment, even though some embodiments herein include certain features and not others. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0106] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some technical features. The modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A base for a molded case circuit breaker, comprising: The base comprises a bottom plate, a first side plate and a second side plate; along a first direction, the first side plate and the second side plate are oppositely arranged on the bottom plate; along a second direction, at least one end of the bottom plate is provided with a terminal placing surface, and the second direction is perpendicular to the first direction; Along the first direction, the terminal placing surface is located in the region between the first side plate and the second side plate, and at least one of the first side plate and the second side plate is provided with a terminal gap, the bottom surface of the terminal gap is connected with the terminal placing surface, and the bottom surface of the terminal gap and the terminal placing surface are located in the same plane, and the bottom surface of the terminal gap and the terminal placing surface form an extended placing surface; the extended placing surface is used for fixing the terminal conductor of the molded case circuit breaker.

2. The molded case circuit breaker base of claim 1, wherein, The extended placing surface is provided with a fixing hole, and along the first direction, the fixing hole is centrally arranged at the extended placing surface.

3. The base of a molded case circuit breaker according to claim 1 or 2, wherein The terminal gap is in the shape of a rectangular slot.

4. The molded case circuit breaker base of claim 1 or 2, wherein, At least one of the first side plate and the second side plate is absent at the corresponding position of the terminal placing surface, and the terminal gap is an open gap.

5. The base of a molded case circuit breaker of claims 1 or 2, wherein, The base of the molded case circuit breaker comprises n partitions, and n is an integer less than or equal to 3; Along the first direction, n partitions are arranged between the first side plate and the second side plate, and the partitions are connected with the bottom plate; Among the first side plate, the partitions and the second side plate, two adjacent ones and the bottom plate form a mounting area; The terminal placing surfaces in adjacent mounting areas are separated by the partitions.

6. A molded case circuit breaker characterized by, The base and the terminal conductor are included; The base comprises a bottom plate, a first side plate and a second side plate; along a first direction, the first side plate and the second side plate are oppositely arranged on the bottom plate; Along a second direction, at least one end of the bottom plate is provided with a terminal placing surface, and the second direction is perpendicular to the first direction; Along the first direction, the terminal placing surface is located in the region between the first side plate and the second side plate, and at least one of the first side plate and the second side plate is provided with a terminal gap, the bottom surface of the terminal gap is connected with the terminal placing surface, and the bottom surface of the terminal gap and the terminal placing surface are located in the same plane, and the bottom surface of the terminal gap and the terminal placing surface form an extended placing surface; The terminal conductor is fixed at the extended placing surface, and the size of the terminal conductor is adapted to the area of the extended placing surface.

7. The molded case circuit breaker of claim 6, wherein, The extended placing surface is provided with a fixing hole, and along the first direction, the fixing hole is centrally arranged at the extended placing surface; The terminal conductor is provided with a connecting hole, and along the first direction, the connecting hole is centrally arranged on the terminal conductor; The fixing hole and the connecting hole are coaxial.

8. The molded case circuit breaker of claim 6 or 7, wherein, The terminal gap is in the shape of a rectangular slot.

9. The molded case circuit breaker of claim 6 or 7, wherein, At least one of the first side plate and the second side plate is absent at the corresponding position of the terminal placing surface, and the terminal gap is an open gap.

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