Insulating partition plate and circuit breaker

Abstract

The utility model relates to the technical field of circuit breakers, in particular to an insulating partition plate and a circuit breaker. The utility model provides an insulation separator plate comprising at least one first plate body; the first plate body comprises a connecting part and an inserting part, and the connecting part is located at the front end of the inserting part; one end of the connecting part facing the circuit breaker is higher than one end of the plugging part facing the circuit breaker. The first plate body is inserted into the end face between the adjacent wiring terminals and the end face between the adjacent exhaust ports on the shell of the circuit breaker through the inserting parts, installation is convenient, the inserting parts are located between the adjacent wiring terminals and the adjacent exhaust ports on the shell of the circuit breaker, interphase breakdown of the circuit breaker can be effectively prevented, and the service life of the circuit breaker is prolonged. Meanwhile, the first plate body is connected with the end face of the front cover of the circuit breaker and the front side face of the shell of the circuit breaker through the connecting parts, the partition range of the first plate body is enlarged, circuit breaker inter-phase breakdown can be further effectively prevented, and therefore the reliability of circuit breaker inter-phase insulation is further guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit breakers, in particular to an insulating partition and a circuit breaker. Background Art

[0002] With the continuous development of power distribution technology, the size and performance requirements of the power distribution system for circuit breakers are gradually increasing, prompting the molded case circuit breaker products to continue to develop in the direction of small size and high performance. At present, the breaking voltage and breaking current of circuit breaker products are getting higher and higher. The arc breaking process will generate huge arc energy. If the phase-to-phase insulation is not done well, it is very easy to cause phase-to-phase breakdown, resulting in product failure. Utility Model Content

[0003] The purpose of the utility model is to provide an insulating partition and a circuit breaker to solve the technical problem that the existing phase-to-phase insulation device cannot meet the demand due to the increasingly higher breaking voltage and breaking current of the circuit breaker products, which is very likely to cause phase breakdown and thus lead to product failure.

[0004] The utility model provides an insulating partition, which is used to be installed at the upper end and / or lower end of a circuit breaker, and along the upper and lower directions of the circuit breaker, the upper and lower ends of the housing of the circuit breaker are higher than the upper and lower ends of the front cover of the circuit breaker, and the insulating partition comprises: at least one first plate body;

[0005] The first plate body includes a connecting portion and a plug-in portion, and along the front-to-back direction of the circuit breaker, the connecting portion is located at the front end of the plug-in portion;

[0006] Along the up-down direction of the circuit breaker, one end of the connecting portion facing the circuit breaker is higher than one end of the plug-in portion facing the circuit breaker;

[0007] The connecting portion is used to be connected to the end face of the front cover of the circuit breaker and the front side face of the housing of the circuit breaker, and the end of the plug-in portion facing the circuit breaker is used to be plugged into the end face between adjacent wiring terminals and between adjacent exhaust ports on the housing of the circuit breaker, so that the plug-in portion is located between adjacent wiring terminals and between adjacent exhaust ports on the housing of the circuit breaker.

[0008] As a further technical solution, the connecting portion is provided with an abutting rib, and the abutting surface width of the abutting rib is greater than the thickness of the first plate body, the abutting rib is used to abut against the end face of the front cover of the circuit breaker and the front side face of the housing of the circuit breaker, or, the abutting rib is used to abut against the end face of the front cover of the circuit breaker, and the end of the connecting portion facing the front side face of the housing of the circuit breaker is inserted into the front side face of the housing of the circuit breaker, or, the abutting rib is used to abut against the front side face of the housing of the circuit breaker, and the end of the connecting portion facing the front cover of the circuit breaker is inserted into the end face of the front cover of the circuit breaker;

[0009] Or, the connecting portion is provided with a first plugging rib, and the first plugging rib is used to be plugged into the limiting fit in the end face of the front cover of the circuit breaker and the limiting fit in the front side face of the housing of the circuit breaker, and the end of the connecting portion facing the front side face of the housing of the circuit breaker is plugged into the front side face of the housing of the circuit breaker;

[0010] Or, the connecting portion is provided with an abutting rib and a first plugging rib, and the abutting surface width of the abutting rib is greater than the thickness of the first plate body, the abutting rib is used to abut against the front side of the housing of the circuit breaker, and the first plugging rib is used to be plugged into the end face of the front cover of the circuit breaker for limiting fit;

[0011] Alternatively, the end of the connecting portion facing the front side of the housing of the circuit breaker is inserted into the front side of the housing of the circuit breaker, and the end of the connecting portion facing the front cover of the circuit breaker is inserted into the end surface of the front cover of the circuit breaker.

[0012] As a further technical solution, a second plug-in rib is provided on the plug-in portion;

[0013] The second plug-in rib is used for being plugged into the end surface of the housing of the circuit breaker for limiting engagement.

[0014] As a further technical solution, the connecting portion and the plug-in portion form an L-shaped structure.

[0015] As a further technical solution, it further includes a second plate body, and the second plate body is used to be arranged on the rear side of the housing of the circuit breaker;

[0016] Along the front-to-rear direction of the circuit breaker, the second plate body is arranged at the rear end of the first plate body, and the second plate body and the first plate body are perpendicular to each other.

[0017] As a further technical solution, a mounting slot is provided on a side of the second plate body facing the first plate body, and a rear end of the first plate body is plugged into the mounting slot.

[0018] The utility model provides a circuit breaker, comprising a shell, a front cover and the insulating partition, wherein the front cover is arranged on the front side of the shell, and the upper and lower ends of the shell are higher than the upper and lower ends of the front cover;

[0019] The upper end of the shell is provided with a connection terminal and an exhaust port communicating with the interior of the shell, and the insulating partition is located at the upper ends of the shell and the front cover, and / or the lower end of the shell is provided with a connection terminal and an exhaust port communicating with the interior of the shell, and the insulating partition is located at the lower ends of the shell and the front cover;

[0020] The connecting portion is connected to the end surface of the front cover and the front side surface of the shell, the plug-in portion is plugged into the end surface of the shell, and the plug-in portion is located between adjacent connecting terminals and between adjacent exhaust ports.

[0021] As a further technical solution, the housing comprises a middle cover and a base arranged in sequence from front to back, and the front cover is arranged on the middle cover;

[0022] The connecting portion is connected to the front side of the middle cover.

[0023] As a further technical solution, the connection terminal is located at the rear side of the exhaust port.

[0024] As a further technical solution, a second plugging rib groove is provided on the end surface of the shell, a second plugging rib is provided on the plug-in portion, and the second plugging rib is plugged into the second plugging rib groove.

[0025] Compared with the prior art, the insulating partition and circuit breaker provided by the utility model have the following technical advantages:

[0026] The utility model provides an insulating partition, which is used to be installed at the upper end and / or the lower end of a circuit breaker, and along the up-down direction of the circuit breaker, the upper and lower ends of the housing of the circuit breaker are higher than the upper and lower ends of the front cover of the circuit breaker, and the insulating partition comprises: at least one first plate body; the first plate body comprises a connecting portion and a plug-in portion, and along the front-back direction of the circuit breaker, the connecting portion is located at the front end of the plug-in portion; along the up-down direction of the circuit breaker, one end of the connecting portion facing the circuit breaker is higher than one end of the plug-in portion facing the circuit breaker; the connecting portion is used to be connected to the end face of the front cover of the circuit breaker and the front side face of the housing of the circuit breaker, and one end of the plug-in portion facing the circuit breaker is used to be plugged into the end face between adjacent wiring terminals and between adjacent exhaust ports on the housing of the circuit breaker, so that the plug-in portion is located between adjacent wiring terminals and between adjacent exhaust ports on the housing of the circuit breaker.

[0027] The insulating partition can be selectively installed on at least one of the upper end and the lower end of the circuit breaker. The first plate body is plugged into the end surface between adjacent wiring terminals and adjacent exhaust ports on the housing of the circuit breaker through the plug-in part, which is easy to install. The plug-in part is located between adjacent wiring terminals and adjacent exhaust ports on the housing of the circuit breaker, which can effectively prevent phase breakdown of the circuit breaker, thereby ensuring the reliability of phase insulation of the circuit breaker. At the same time, the first plate body is connected to the end surface of the front cover of the circuit breaker and the front side surface of the housing of the circuit breaker through the connecting part located at the front end of the plug-in part, which increases the partition range of the first plate body, can further effectively prevent phase breakdown of the circuit breaker, thereby further ensuring the reliability of phase insulation of the circuit breaker.

[0028] The circuit breaker provided by the utility model includes a shell, a front cover and the above-mentioned insulating partition, the front cover is arranged on the front side of the shell, and the upper and lower ends of the shell are higher than the upper and lower ends of the front cover; the upper end of the shell is provided with a wiring terminal and an exhaust port connected to the inside of the shell, and the insulating partition is located at the upper end of the shell and the front cover; and / or; the lower end of the shell is provided with a wiring terminal and an exhaust port connected to the inside of the shell, and the insulating partition is located at the lower end of the shell and the front cover; the connecting part is connected to the end face of the front cover and the front side face of the shell, the plug-in part is plugged into the end face of the shell, and the plug-in part is located between adjacent wiring terminals and between adjacent exhaust ports. Therefore, the technical advantages and effects achieved include the technical advantages and effects achieved by the above-mentioned insulating partition, which will not be elaborated here.

[0029] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the circuit breaker structure when an insulating partition is installed provided in an embodiment of the utility model;

[0032] Figure 2 A schematic diagram of the first plate structure provided in an embodiment of the utility model;

[0033] Figure 3 A schematic diagram of the second plate structure provided in an embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the circuit breaker structure when no insulating partition is installed, provided in an embodiment of the utility model.

[0035] Icons: 1-insulating partition; 2-circuit breaker; 3-housing; 4-front cover; 5-first plate; 6-connecting part; 7-plug-in part; 8-connecting terminal; 9-exhaust port; 10-abutting rib; 11-second plug-in rib; 12-second plate; 13-installation slot; 14-middle cover; 15-base; 16-second plug-in rib slot. DETAILED DESCRIPTION

[0036] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0040] The present invention will be further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0041] Specific structure such as Figures 1 to 4 shown.

[0042] The present embodiment provides an insulating partition 1, which is used to be installed at the upper end and / or lower end of the circuit breaker 2, and along the up-down direction of the circuit breaker 2, the upper and lower ends of the housing 3 of the circuit breaker 2 are higher than the upper and lower ends of the front cover 4 of the circuit breaker 2, and the insulating partition 1 includes: at least one first plate body 5; the first plate body 5 includes a connecting portion 6 and a plug-in portion 7, and along the front-to-back direction of the circuit breaker 2, the connecting portion 6 is located at the front end of the plug-in portion 7; along the up-to-down direction of the circuit breaker 2, one end of the connecting portion 6 facing the circuit breaker 2 is higher than one end of the plug-in portion 7 facing the circuit breaker 2; the connecting portion 6 is used to be connected to the end face of the front cover 4 of the circuit breaker 2 and the front side face of the housing 3 of the circuit breaker 2, and the end of the plug-in portion 7 facing the circuit breaker 2 is used to be plugged into the end face between adjacent wiring terminals 8 and adjacent exhaust ports 9 on the housing 3 of the circuit breaker 2, so that the plug-in portion 7 is located between adjacent wiring terminals 8 and adjacent exhaust ports 9 on the housing 3 of the circuit breaker 2.

[0043] In this embodiment, the insulating partition 1 can be selectively installed at least one of the upper end and the lower end of the circuit breaker 2. The following description is based on the example that the insulating partition 1 is installed at the upper end of the circuit breaker 2. The first plate body 5 is plugged into the end surface between the adjacent wiring terminals 8 and the adjacent exhaust ports 9 at the upper end of the housing 3 of the circuit breaker 2 through the plug-in portion 7, which is convenient for installation. The plug-in portion 7 is located between the adjacent wiring terminals 8 and the adjacent exhaust ports 9 at the upper end of the housing 3 of the circuit breaker 2, which can effectively prevent the upper end of the circuit breaker 2 from being broken through, thereby ensuring the reliability of the upper end of the circuit breaker 2. At the same time, the first plate body 5 is connected to the upper end surface of the front cover 4 of the circuit breaker 2 and the front side surface of the housing 3 of the circuit breaker 2 through the connecting portion 6 located at the front end of the plug-in portion 7, which increases the isolation range of the first plate body 5, can further effectively prevent the upper end of the circuit breaker 2 from being broken through, thereby further ensuring the reliability of the upper end of the circuit breaker 2.

[0044] It should be noted that, in this embodiment, the front, rear, upper and lower directions are set based on the circuit breaker 2, wherein the front direction of the circuit breaker 2 is the front direction of the circuit breaker 2, the back direction of the circuit breaker 2 is the back direction of the circuit breaker 2, the upper end direction of the circuit breaker 2 is the upper direction of the circuit breaker 2, and the lower end direction of the circuit breaker 2 is the lower direction of the circuit breaker 2.

[0045] In this embodiment, the number of first plates 5 is determined according to specific needs. Preferably, the number of first plates 5 is determined according to the number of phases of the circuit breaker 2, that is, the number of first plates 5 corresponding to the number of phases is set to ensure the reliability of insulation between all phases.

[0046] In the optional technical solution of this embodiment, the connection part 6 is provided with abutting ribs 10, and the width of the abutting surface of the abutting ribs 10 is greater than the thickness of the first plate body 5. The abutting surface of the abutting ribs 10 abuts against the upper end surface of the front cover 4 of the circuit breaker 2 and the front side surface of the housing 3 of the circuit breaker 2 in a fitted state, and the abutting area is large, thereby ensuring the partition effect and enhancing the insulation effect, thereby ensuring the reliability of the phase-to-phase insulation of the upper end of the circuit breaker 2. Another implementation method is that only the end surface of the front cover 4 of the circuit breaker 2 of the connection part 6 abuts against the upper end surface of the front cover 4 of the circuit breaker 2 through the abutting surface of the abutting ribs 10. At this time, a slot is provided on the front side surface of the housing 3 of the circuit breaker 2, and the end of the connection part 6 facing the front side surface of the housing 3 of the circuit breaker 2 is directly inserted into the slot on the front side surface of the housing 3 of the circuit breaker 2.

[0047] The present embodiment is not limited thereto, and a first plug-in rib may be provided on the connecting portion 6. In this case, a first plug-in rib groove is provided on the upper end surface of the front cover 4 of the circuit breaker 2. The first plug-in rib can be inserted into the first plug-in rib groove to limit the position, thereby ensuring the stability of the insertion and thus ensuring the reliability of the phase-to-phase insulation. In this case, a slot may be provided on the front side of the housing 3 of the circuit breaker 2, and the connecting portion 6 is directly inserted into the slot on the front side of the housing 3 of the circuit breaker 2. Alternatively, no slot may be provided on the front side of the housing 3 of the circuit breaker 2, and the connecting portion 6 may directly abut against the front side of the housing 3 of the circuit breaker 2.

[0048] Alternatively, the connection portion 6 is provided with abutting ribs 10 and first plugging ribs, and the width of the abutting surface of the abutting ribs 10 is greater than the thickness of the first plate 5, and the abutting surface of the abutting ribs 10 is in abutting state with the front side surface of the housing 3 of the circuit breaker 2, and the abutting area is large, which ensures the partition effect and enhances the insulation effect, thereby ensuring the reliability of the phase-to-phase insulation of the upper end of the circuit breaker 2; the first plugging rib is used to be inserted into the end surface of the front cover 4 of the circuit breaker 2 for limited fit, at this time, the upper end surface of the front cover 4 of the circuit breaker 2 is provided with a first plugging rib groove, and the first plugging rib can be inserted into the first plugging rib groove to limit the position, ensuring the stability of the plug-in, thereby ensuring the reliability of the phase-to-phase insulation. This embodiment is not limited to this, and the upper end surface of the front cover 4 of the circuit breaker 2 can also be directly provided with a slot, and the end of the connection portion 6 facing the circuit breaker 2 is directly plugged into the slot, which has a simple structure and is easy to manufacture.

[0049] There are many possible combinations, which I will not go into detail here.

[0050] In the optional technical solution of this embodiment, a second plugging rib 11 is provided on the plug-in portion 7; the second plugging rib 11 is used to be plugged into the end face of the housing 3 of the circuit breaker 2 for limited fit. At this time, a second plugging rib groove 16 is provided on the upper end face of the housing 3 of the circuit breaker 2, and the second plugging rib 11 can be plugged into the second plugging rib groove 16 to limit the position, thereby ensuring the stability of the plug-in, thereby ensuring the reliability of the phase-to-phase insulation.

[0051] The present embodiment is not limited thereto, and a slot may be directly provided on the upper end surface of the housing 3 of the circuit breaker 2, and the end of the plug-in portion 7 facing the circuit breaker 2 is directly plugged into the slot, which has a simple structure and is easy to manufacture.

[0052] In the optional technical solution of this embodiment, the connecting portion 6 and the plug-in portion 7 form an L-shaped structure. Since the front side and the upper end surface of the housing 3 of the circuit breaker 2 are L-shaped, the connecting portion 6 and the plug-in portion 7 form an L-shaped structure, which is more convenient to connect with the housing 3 and avoids leaving a gap. However, it is not limited to this. The shape formed by the connecting portion 6 and the plug-in portion 7 can be specifically determined according to the shape between the front side and the upper end surface of the housing 3 of the circuit breaker 2, as long as they can match each other.

[0053] The optional technical solution of this embodiment also includes a second plate body 12, and the second plate body 12 is used to be arranged on the rear side of the housing 3 of the circuit breaker 2; along the front and rear direction of the circuit breaker 2, the second plate body 12 is arranged at the rear end of the first plate body 5, and the second plate body 12 and the first plate body 5 are perpendicular to each other.

[0054] In this embodiment, after the circuit breaker 2 is installed on the installation surface of the circuit breaker 2, the second plate 12 can block the arc spray energy from entering the rear side of the circuit breaker 2, thereby improving safety.

[0055] In this embodiment, the second plate body 12 can be connected to the rear side of the housing 3 of the circuit breaker 2, but is not limited to this. The second plate body 12 and the circuit breaker 2 may not be connected. When the circuit breaker 2 is installed on the mounting surface of the circuit breaker 2, the second plate body 12 is clamped between the rear side of the housing 3 of the circuit breaker 2 and the mounting surface of the circuit breaker 2 to achieve fixation. The structure is simple and the installation is convenient.

[0056] In the optional technical solution of this embodiment, a mounting slot 13 is provided on the side of the second plate body 12 facing the first plate body 5, and the rear end of the first plate body 5 is plugged into the mounting slot 13. The installation is stable and convenient, and a gap is avoided between the rear end of the first plate body 5 and the side of the second plate body 12 facing the first plate body 5, thereby ensuring the reliability of phase-to-phase insulation.

[0057] In this embodiment, the second plate body 12 is made of a hard insulating material, which has high strength and avoids deformation.

[0058] The present embodiment is not limited thereto, and the side of the second plate body 12 facing the first plate body 5 may also directly abut against the rear end of the first plate body 5 , which has a simple structure and is easy to manufacture.

[0059] It should be noted that, in this embodiment, the plugging direction of the plug-in portion 7 is from the front side to the rear side of the circuit breaker 2 , which is convenient for plugging and avoids interference between the connecting portion 6 and the housing 3 of the circuit breaker 2 .

[0060] A circuit breaker 2 provided in this embodiment includes a housing 3, a front cover 4 and the above-mentioned insulating partition 1, wherein the front cover 4 is provided on the front side of the housing 3, and the upper and lower ends of the housing 3 are higher than the upper and lower ends of the front cover 4; the upper end of the housing 3 is provided with a wiring terminal 8 and an exhaust port 9 connected to the inside of the housing 3, and the insulating partition 1 is located at the upper end of the housing 3 and the front cover 4; and / or; the lower end of the housing 3 is provided with a wiring terminal 8 and an exhaust port 9 connected to the inside of the housing 3; the insulating partition 1 is located at the lower end of the housing 3 and the front cover 4; the connecting portion 6 is connected to the end face of the front cover 4 and the front side face of the housing 3, the plug-in portion 7 is plugged into the end face of the housing 3, and the plug-in portion 7 is located between adjacent wiring terminals 8 and adjacent exhaust ports 9. Therefore, the technical advantages and effects achieved by the circuit breaker 2 include the technical advantages and effects achieved by the above-mentioned insulating partition 1, which will not be repeated here.

[0061] In the optional technical solution of this embodiment, the housing 3 includes a middle cover 14 and a base 15 arranged in sequence from front to back, the front cover 4 is covered on the middle cover 14, and the connecting portion 6 is connected to the front side of the middle cover 14. The housing 3 has a simple structure and is easy to assemble.

[0062] In an optional technical solution of this embodiment, the connection terminal 8 is located at the rear side of the exhaust port 9 . However, the present invention is not limited thereto, and the connection terminal 8 may also be located at the front side of the exhaust port 9 .

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. An insulating partition, used for installation at the upper end and / or lower end of a circuit breaker (2), wherein along the up and down direction of the circuit breaker (2), the upper and lower ends of the housing (3) of the circuit breaker (2) are higher than the upper and lower ends of the front cover (4) of the circuit breaker (2), characterized in that: The insulating partition (1) comprises: at least one first plate body (5); The first plate body (5) comprises a connecting portion (6) and an inserting portion (7), and along the front-to-back direction of the circuit breaker (2), the connecting portion (6) is located at the front end of the inserting portion (7); Along the up-down direction of the circuit breaker (2), one end of the connecting portion (6) facing the circuit breaker (2) is higher than one end of the plug-in portion (7) facing the circuit breaker (2); The connecting portion (6) is used to connect to the end face of the front cover (4) of the circuit breaker (2) and the front side face of the housing (3) of the circuit breaker (2); the end of the plug-in portion (7) facing the circuit breaker (2) is used to plug into the end face between adjacent wiring terminals (8) and between adjacent exhaust ports (9) on the housing (3) of the circuit breaker (2), so that the plug-in portion (7) is located between adjacent wiring terminals (8) and between adjacent exhaust ports (9) on the housing (3) of the circuit breaker (2).

2. The insulating spacer according to claim 1, characterized in that: The connecting portion (6) is provided with an abutting rib (10), and the abutting surface width of the abutting rib (10) is greater than the thickness of the first plate (5), and the abutting rib (10) is used to abut against the end face of the front cover (4) of the circuit breaker (2) and the front side face of the housing (3) of the circuit breaker (2), or, the abutting rib (10) is used to abut against the end face of the front cover (4) of the circuit breaker (2), and the end of the connecting portion facing the front side face of the housing (3) of the circuit breaker (2) is inserted into the front side face of the housing (3) of the circuit breaker (2), or, the abutting rib (10) is used to abut against the front side face of the housing (3) of the circuit breaker (2), and the end of the connecting portion (6) facing the front cover (4) of the circuit breaker (2) is inserted into the end face of the front cover (4) of the circuit breaker (2); Alternatively, a first plug-in rib is provided on the connecting portion (6), and the first plug-in rib is used to be plugged into the end face of the front cover (4) of the circuit breaker (2) for limited engagement, and the end of the connecting portion (6) facing the front side face of the housing (3) of the circuit breaker (2) is plugged into the front side face of the housing (3) of the circuit breaker (2); Alternatively, the connecting portion (6) is provided with an abutment rib (10) and a first plug-in rib, and the abutment surface width of the abutment rib (10) is greater than the thickness of the first plate (5), the abutment rib (10) is used to abut against the front side surface of the housing (3) of the circuit breaker (2), and the first plug-in rib is used to be plugged into the end surface of the front cover (4) of the circuit breaker (2) for limited engagement; Alternatively, the end of the connecting portion (6) facing the front side of the housing (3) of the circuit breaker (2) is inserted into the front side of the housing (3) of the circuit breaker (2), and the end of the connecting portion (6) facing the front cover (4) of the circuit breaker (2) is inserted into the end face of the front cover (4) of the circuit breaker (2).

3. The insulating spacer according to claim 1, characterized in that: The plug-in portion (7) is provided with a second plug-in rib (11); The second plug-in rib (11) is used for being plugged into the end surface of the housing (3) of the circuit breaker (2) for position-limiting engagement.

4. The insulating spacer according to claim 1, characterized in that: The connecting portion (6) and the plug-in portion (7) form an L-shaped structure.

5. The insulating spacer according to any one of claims 1 to 4, characterized in that: It also includes a second plate body (12), and the second plate body (12) is used to be arranged on the rear side of the housing (3) of the circuit breaker (2); Along the front-to-rear direction of the circuit breaker (2), the second plate body (12) is arranged at the rear end of the first plate body (5), and the second plate body (12) and the first plate body (5) are perpendicular to each other.

6. The insulating spacer according to claim 5, characterized in that: A mounting slot (13) is provided on a side of the second plate body (12) facing the first plate body (5), and a rear end of the first plate body (5) is plugged into the mounting slot (13).

7. A circuit breaker, characterized in that: It comprises a shell (3), a front cover (4) and an insulating partition (1) according to any one of claims 1 to 6, wherein the front cover (4) is arranged on the front side of the shell (3), and the upper and lower ends of the shell (3) are higher than the upper and lower ends of the front cover (4); The upper end of the shell (3) is provided with a connection terminal (8) and an exhaust port (9) communicating with the interior of the shell (3), and the insulating partition (1) is located at the upper end of the shell (3) and the front cover (4), and / or the lower end of the shell (3) is provided with a connection terminal (8) and an exhaust port (9) communicating with the interior of the shell (3), and the insulating partition (1) is located at the lower end of the shell (3) and the front cover (4); The connecting portion (6) is connected to the end surface of the front cover (4) and the front side surface of the shell (3), the plug-in portion (7) is plugged into the end surface of the shell (3), and the plug-in portion (7) is located between adjacent connecting terminals (8) and between adjacent exhaust ports (9).

8. The circuit breaker according to claim 7, characterized in that: The housing (3) comprises a middle cover (14) and a base (15) which are arranged in sequence from front to back, and the front cover (4) is covered on the middle cover (14); The connecting portion (6) is connected to the front side of the middle cover (14).

9. The circuit breaker according to claim 7, characterized in that: The connection terminal (8) is located at the rear side of the exhaust port (9).

10. The circuit breaker according to claim 7, characterized in that: The end surface of the housing (3) is provided with a second plugging rib groove (16), the plug-in portion (7) is provided with a second plugging rib (11), and the second plugging rib (11) is plugged into the second plugging rib groove (16).

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