CN219626564U - Base and have its electric leakage circuit breaker, air circuit breaker - Google Patents

Abstract

The embodiment of the utility model provides a base, which comprises a wiring part, an operating mechanism installation part and a preset installation part, wherein the wiring part is used for connecting an external lead; the operating mechanism mounting part is used for mounting an electric leakage operating mechanism or an idle operating mechanism; the preset installation part is positioned between the wiring part and the operating mechanism installation part, and a leakage limiting structure and an idle limiting structure are arranged in the preset installation part; the idle-opening limiting structure is used for limiting the position of the idle-opening tripping mechanism and avoiding interference between the idle-opening tripping mechanism and the electric leakage limiting structure. The base provided by the embodiment of the utility model can be used for the air circuit breaker, can also be used for the electric leakage circuit breaker, avoids independently designing the base for the electric leakage circuit breaker and the air circuit breaker, and can also improve the connection stability of each part of the electric leakage circuit breaker and the air circuit breaker in the base.

Description

Base and have its electric leakage circuit breaker, air circuit breaker

Technical Field

The embodiment of the utility model relates to the technical field of electric components, in particular to a base, and an electric leakage breaker and an air circuit breaker with the base.

Background

The air circuit breaker, also called an air switch, is used for protecting a circuit from being damaged under the conditions of overload, short circuit or undervoltage, and mainly comprises a base, an air-break operating mechanism and an air-break trip component; the leakage circuit breaker is used for providing indirect contact protection for dangerous personal electric shock and preventing disasters such as fire disaster caused by insulation damage of electrical equipment, and mainly comprises a base, a leakage operating mechanism and a leakage tripping mechanism, wherein the leakage tripping mechanism comprises a current transformer, a circuit board with a housing and the like. Because the specific structures of the air circuit breaker and the residual current circuit breaker are different, the bases of the air circuit breaker and the residual current circuit breaker cannot be used commonly, so that the design cost of the circuit breaker is saved, the base is prevented from being designed for the air circuit breaker or the residual current circuit breaker independently, and the base can be used for the air circuit breaker and the residual current circuit breaker.

However, when the conventional base is used in an earth leakage breaker or an air circuit breaker, there is a problem that the connection of parts in the base is unstable, and the usability of the earth leakage breaker or the air circuit breaker is easily affected.

Disclosure of Invention

In view of the above problems, embodiments of the present utility model provide a base, and an electrical leakage breaker and an air circuit breaker with the base, where the base may be used for both an air circuit breaker and an electrical leakage breaker, so as to avoid separately designing the base for the electrical leakage breaker and the air circuit breaker, and reduce the design cost of the electrical leakage breaker and the air circuit breaker.

The first aspect of the embodiment of the utility model provides a base, which comprises a wiring part, an operating mechanism installation part and a preset installation part, wherein the wiring part is used for connecting an external lead; the operating mechanism mounting part is used for mounting an electric leakage operating mechanism or an idle operating mechanism; the preset installation part is positioned between the wiring part and the operating mechanism installation part, and a leakage limiting structure and an idle limiting structure are arranged in the preset installation part; the idle-opening limiting structure is used for limiting the position of the idle-opening tripping mechanism and avoiding interference between the idle-opening tripping mechanism and the electric leakage limiting structure.

Optionally, the electric leakage tripping device comprises a circuit board and a housing, wherein the circuit board is arranged in the housing, an opening of the housing faces to the base, the electric leakage limiting structure comprises a first limiting structure and a second limiting structure, the housing is arranged between the first limiting structure and the second limiting structure, and the positions of the housing are limited by the first limiting structure and the second limiting structure along two opposite sides of the housing.

Optionally, the first limiting structure and/or the second limiting structure are/is arranged as a limiting convex strip or a limiting plate.

Optionally, the electric leakage limiting structure further comprises a third limiting structure, the first limiting structure, the second limiting structure and the third limiting structure are distributed in a triangle shape, and the first limiting structure, the second limiting structure and the third limiting structure are used for placing the housing so as to respectively position the housing along three directions.

Optionally, a chamfer is provided at an end of the side of the first limiting structure and/or the second limiting structure and/or the third limiting structure, which is used for contacting the housing, and is far away from the bottom wall of the base, so as to mount the housing.

Optionally, the electric leakage limit structure further comprises a first boss arranged on the bottom wall of the base and a first mounting hole arranged on the first boss, the first boss is arranged avoiding the empty limit structure, and the housing is connected with the base through the first mounting hole.

Optionally, the electric leakage tripping mechanism further comprises a current transformer, the electric leakage limiting structure further comprises a second boss arranged on the bottom wall of the base and a second mounting hole arranged on the second boss, the second boss avoids the space-open limiting structure and the area between the first limiting structure and the second limiting structure, and the current transformer is connected with the base through the second mounting hole.

Optionally, the idle-opening limiting structure comprises a mounting groove, the mounting groove is used for plugging a partition plate, and the partition plate is used for separating and limiting two adjacent idle-opening tripping mechanisms.

The base provided by the embodiment of the utility model is provided with the electric leakage limiting structure and the idle limiting structure in the preset installation part, the electric leakage limiting structure and the idle limiting structure do not interfere with each other, and when the base is used for an electric leakage breaker, the position of the electric leakage tripping mechanism is limited through the electric leakage limiting structure so as to ensure the connection stability between the electric leakage tripping mechanism and the base, and further ensure the working stability and reliability of the electric leakage breaker; when the base is used for an air circuit breaker, the air release tripping mechanism is limited through the air release limiting structure, so that the working stability and reliability of the air circuit breaker are ensured.

According to a second aspect of the embodiment of the present utility model, there is provided an earth leakage breaker including an earth leakage operation mechanism, an earth leakage trip mechanism, and the base of any of the above embodiments, the earth leakage operation mechanism being mounted in an operation mechanism mounting portion in the base, the earth leakage trip mechanism being provided in a preset mounting portion in the base.

According to the leakage breaker provided by the embodiment of the utility model, the base provided by any one of the embodiments is used, so that the design and manufacture of the base for the leakage breaker are avoided, the design cost of the leakage breaker is saved, and the working stability and reliability of the leakage breaker can be ensured due to the fact that the leakage limiting structure is arranged in the preset installation part of the base.

According to a third aspect of the embodiment of the present utility model, there is provided an air circuit breaker including an air-break operating mechanism, an air-break trip mechanism, and the base of any of the above embodiments, the air-break operating mechanism being mounted on an operating mechanism mounting portion in the base, the air-break trip mechanism being provided on a preset mounting portion in the base.

According to the air-break circuit breaker provided by the embodiment of the utility model, the base provided by any one of the embodiments is used, the base is prevented from being designed and manufactured for the air-break circuit breaker, the design cost of the air-break circuit breaker is saved, and the working stability and reliability of the air-break circuit breaker can be ensured due to the air-break limiting structure arranged in the preset installation part of the base.

The foregoing description is only an overview of the technical solutions of the embodiments of the present utility model, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present utility model can be more clearly understood, and the following specific embodiments of the present utility model are given for clarity and understanding.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a base according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a base with another view angle according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of an internal structure of an electrical leakage breaker according to an embodiment of the present utility model;

fig. 4 is a schematic diagram of an internal structure of an air circuit breaker according to an embodiment of the present utility model.

Reference numerals illustrate:

101. a wiring section; 102. presetting an installation part; 120. a first boss; 121. a first limit structure; 122. a second limit structure; 123. a third limit structure; 124. a second boss; 125. a second mounting hole; 126. a first mounting hole; 127. a mounting groove; 103. an operating mechanism mounting portion; 104. a third boss; 201. a housing; 202. a current transformer; 203. a first connection plate; 204. a leakage operation mechanism; 301. a partition plate; 302. a second connecting plate; 303. and an idle operation mechanism.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Unless defined otherwise, 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 utility model belongs; the terminology used in the description of the applications herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description and claims of the utility model and in the description of the drawings are intended to cover a non-exclusive inclusion.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: there are three cases, a, B, a and B simultaneously. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The directional terms appearing in the following description are all directions shown in the drawings and do not limit the specific structure of the socket of the present utility model. For example, in the description of the present utility model, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not for describing a particular sequential order, and may be used to improve one or more of these features either explicitly or implicitly.

In the description of the present utility model, unless otherwise indicated, the meaning of "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two).

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, e.g., as a "connected" or "coupled" of a mechanical structure may refer to a physical connection, e.g., as a fixed connection, e.g., via a fastener, such as a screw, bolt, or other fastener; the physical connection may also be a detachable connection, such as a snap-fit or snap-fit connection; the physical connection may also be an integral connection, such as a welded, glued or integrally formed connection. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In order to make the person skilled in the art better understand the solution of the present utility model, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

The embodiment of the utility model discloses a base, as shown in fig. 1 and 2, fig. 1 is a schematic structural diagram of the base provided by the embodiment of the utility model; FIG. 2 is a schematic view of a base with another view angle according to an embodiment of the present utility model; the base comprises a wiring part 101, an operating mechanism mounting part 103 and a preset mounting part 102, wherein the wiring part 101 is used for connecting an external lead; the operating mechanism mounting portion 103 is used for mounting the electric leakage operating mechanism 204 or the idle operating mechanism 303; the preset installation part 102 is positioned between the wiring part 101 and the operating mechanism installation part 103, and a leakage limiting structure and an idle limiting structure are arranged in the preset installation part 102, wherein the leakage limiting structure is used for limiting the position of the leakage tripping mechanism and avoiding interference between the leakage tripping mechanism and the idle limiting structure; the idle-opening limiting structure is used for limiting the position of the idle-opening tripping mechanism and avoiding interference between the idle-opening tripping mechanism and the electric leakage limiting structure.

In the embodiment of the present utility model, the wiring portion 101 may specifically include a wire inlet portion and a wire outlet portion, where the wire inlet portion and the wire outlet portion are connected with an external connection wire through a terminal or other components, so as to implement electrical connection between the leakage circuit breaker or the air circuit breaker and the external connection component, so that the leakage circuit breaker or the air circuit breaker is conveniently connected in the circuit system, and when the circuit system is abnormal, the circuit system is protected.

When the base is used for the earth leakage breaker, the earth leakage operating mechanism 204 may have one or more, the operating mechanism mounting portions 103 are correspondingly provided in correspondence with the number of the earth leakage operating mechanisms 204, for example, when there is only one earth leakage operating mechanism 204, the operating mechanism mounting portions 103 are correspondingly provided with one, and when there are three earth leakage operating mechanisms 204, the operating mechanism mounting portions 103 are correspondingly provided with three.

The electric leakage operating mechanism 204 comprises a first traction rod, a tripping coil and other parts, the electric leakage tripping mechanism at least comprises a first connecting plate 203, a current transformer 202 and a circuit board, wherein the current transformer 202 is used for detecting the current state in a protected circuit, when electric leakage or human body electric shock occurs in the protected circuit, signals are sent to the circuit board, the circuit board rectifies and amplifies the received signals, when the current in the circuit reaches the limit value of the electric leakage breaker, working voltage is provided for the tripping coil, and then other parts of the electric leakage operating mechanism 204 are driven to act, so that the electric leakage breaker is in an open circuit state, and the circuit is protected.

Similarly, when the base is used for an air circuit breaker, there may be one or more of the air-opening operators 303, the operator mounting portions 103 may be provided corresponding to the number of the air-opening operators 303, for example, when there is only one air-opening operator 303, the operator mounting portions 103 may be provided corresponding to one, and when there are three air-opening operators 303, the operator mounting portions 103 may be provided corresponding to three.

The idle opening operation mechanism 303 at least comprises a second traction rod, the idle opening trip mechanism comprises a second connecting plate 302, a magnetic trip component, a thermal trip component and other parts, when a circuit is short-circuited, overloaded or undervoltage, the idle opening trip mechanism acts to push the idle opening operation mechanism 303 to act, and then the main contacts of the air circuit breaker are separated, and the current in the circuit is cut off so as to protect the circuit.

In a specific embodiment, as shown in fig. 1 and fig. 3, fig. 3 is a schematic diagram of an internal structure of an earth leakage breaker according to an embodiment of the present utility model; the electric leakage tripping mechanism comprises a circuit board and a housing 201, the circuit board is arranged in the housing 201, an opening of the housing 201 faces to a base, the electric leakage limiting structure comprises a first limiting structure 121 and a second limiting structure 122, the housing 201 is arranged between the first limiting structure 121 and the second limiting structure 122, so that the first limiting structure 121 and the second limiting structure 122 limit the movable space of the housing 201 along two opposite sides of the housing 201, and the possibility that the housing 201 shakes between the first limiting structure 121 and the second limiting structure 122 is reduced.

In the embodiment of the utility model, the circuit board is arranged in the housing 201 to protect the circuit board, so that the circuit board is prevented from being short-circuited due to the fact that foreign matters such as liquid or dust enter the circuit board in the installation or working process of the leakage circuit breaker, and the working stability and reliability of the leakage circuit breaker are further affected.

The housing 201 is arranged between the first limiting structure 121 and the second limiting structure 122, and the movable space of the housing 201 can be limited along the arrangement direction of the first limiting structure 121 and the second limiting structure 122 through the contact between the housing 201 and the first limiting structure 121 and the second limiting structure 122. The first limiting structure 121 and the second limiting structure 122 may be provided as protrusions or grooves, and when the first limiting structure 121 and the second limiting structure 122 are provided as protrusions, the housing 201 may be limited by arranging the housing 201 between the first limiting structure 121 and the second limiting structure 122; when the first limiting structure 121 and the second limiting structure 122 are configured as grooves, the cover 201 is provided with protrusions corresponding to the grooves, and the protrusions are clamped with the grooves to limit the cover 201. The cover 201 may contact with the first limiting structure 121 and the second limiting structure 122 at the same time, or may contact with only one of the first limiting structure 121 and the second limiting structure 122, which is not limited in the embodiment of the present utility model, and only the first limiting structure 121 and the second limiting structure 122 are needed to limit the cover 201.

In an alternative embodiment, the first limiting structure 121 and/or the second limiting structure 122 are configured as limiting ribs or limiting plates. The limiting raised strips and the limiting plates are raised out of the bottom of the base, and the contact area between the housing 201 and the first limiting structure 121 and/or the second limiting structure 122 can be increased by setting the first limiting structure 121 and/or the second limiting structure 122 as the limiting raised strips or the limiting plates, so that the reliability of the first limiting structure 121 and/or the second limiting structure 122 to the housing 201 is ensured.

In a specific embodiment, as shown in fig. 1 and 3, the leakage limiting structure further includes a third limiting structure 123, where the first limiting structure 121, the second limiting structure 122, and the third limiting structure 123 are distributed in a triangle, and the housing 201 is placed between the first limiting structure 121, the second limiting structure 122, and the third limiting structure 123, so as to limit the position of the housing 201 along three directions respectively.

In the embodiment of the present utility model, the third limiting structure 123 may be a protrusion-shaped object parallel to the arrangement direction of the first limiting structure 121 and the second limiting structure and keeping a gap with the side wall of the base, or may be a protrusion-shaped object contacting with the side wall of the base and perpendicular to the arrangement direction, and the protrusion-shaped object may be a protrusion-shaped object or a plate-shaped object, or may be a structure with other shapes, as long as the movement direction of the casing 201 can be limited in the direction perpendicular to the first limiting structure 121 and the second limiting structure 122.

Through setting up the relative both sides of housing 201 and contacting with first limit structure 121 and second limit structure 122 respectively, limit the activity space of housing 201 along the range direction of first limit structure 121 and second limit structure 122, on this basis, set up the third limit structure 123 that is triangle-shaped with first limit structure 121 and second limit structure 122 and distribute, with the range direction and the contact of housing 201 of perpendicular to first limit structure 121 and second limit structure 122, limit the activity space of housing 201, further improve the activity space of housing 201 in the base, in order to guarantee the connection reliability between electric leakage tripping device and the base, and then guarantee the stability in use and the reliability of electric leakage circuit breaker.

In an embodiment, the first limiting structure 121 and/or the second limiting structure 122 and/or the third limiting structure 123 are/is configured with a chamfer at an end far from the bottom wall of the base on a side contacting the housing 201, so as to facilitate installation and replacement of the housing 201.

In a specific embodiment, as shown in fig. 2 and 3, the leakage limiting structure further includes a first boss 120 disposed on the bottom wall of the base, and a first mounting hole 126 disposed on the first boss 120, where the first boss 120 is disposed avoiding the space limiting structure, and the housing 201 is connected to the base through the first mounting hole 126.

Through setting up first boss 120 in order to avoid sky to open stop gear and electric leakage stop gear and interfere each other, and through setting up first mounting hole 126 on first boss 120, first mounting hole 126 sets up in the one side that is close to the base lateral wall to avoid interfering with sky to open limit structure, realize simultaneously that being connected between housing 201 and the base, specifically can realize being connected between housing 201 and the base through riveting or threaded connection's mode, further avoid housing 201 to take place relative displacement for first limit structure 121 and second limit structure 122.

In a specific embodiment, as shown in fig. 1 and 3, the leakage tripping mechanism further includes a current transformer 202, the leakage limiting structure further includes a second boss 124 disposed on the bottom wall of the base, and a second mounting hole 125 disposed on the second boss 124, the second boss 124 is set up avoiding the space-saving limiting structure and the area between the first limiting structure 121 and the second limiting structure 122, and the current transformer 202 is connected with the base through the second mounting hole 125.

In order to ensure that the installation of the current transformer 202 does not interfere with the open limiting structure, the second boss 124 is set avoiding the open limiting structure, and the second boss 124 is provided with the second mounting hole 125, the current transformer 202 is connected with the base through the second mounting hole 125 and fixed on the base, and the current transformer 202 and the second mounting hole 125 can be connected through riveting, threaded connection or other connection modes, which is not limited in the embodiment of the utility model.

In order to reduce the injury to operating personnel and the possibility of damaging the second boss 124, the corner angle of the second boss 124 can be subjected to chamfering treatment, so that the second boss 124 is prevented from being damaged due to collision with other parts, or other parts are prevented from being damaged due to the existence of the corner angle, and meanwhile, the probability of injury to the operating personnel due to touching the corner angle of the second boss 124 in the installation process between the housing 201 and the base is reduced due to the chamfering treatment of the corner angle of the second boss 124.

In a specific embodiment, the electric leakage breaker includes a first connection plate 203, which is disposed between the connection portion 101 and the operation mechanism mounting portion 103, and is used for connecting the connection portion 101 and the electric leakage operation mechanism 204 so as to conduct the current inside the electric leakage breaker, where the first connection plate 203 is fixed on the base through the third boss 104, specifically, a threaded hole may be disposed on the third boss 104, so that the connection between the first connection plate 203 and the base is achieved through a threaded connection member, and the connection between the first connection plate 203 and the third boss 104 may also be achieved through a rivet or other connection member.

In a specific embodiment, as shown in fig. 1 and fig. 4, fig. 4 is a schematic diagram of an internal structure of an air circuit breaker according to an embodiment of the present utility model, where the space-open limiting structure includes a mounting groove 127, the mounting groove 127 is used for plugging a spacer 301, and the spacer 301 is used for separating and limiting two adjacent space-open tripping mechanisms.

The connection between the partition plate 301 and the base is realized through the mounting groove 127, the partition plate 301 is used for separating two adjacent air-break tripping mechanisms so as to improve interphase insulation between the air-break tripping mechanisms, ensure the use reliability and stability of the air circuit breaker, two adjacent second connecting plates 302 are distributed on two sides of the partition plate 301, the second connecting plates 302 are connected in the base through the wiring part 101 and the air-break operating mechanism 303, and the second connecting plates 302 are arranged between the wiring part 101 and the air-break operating mechanism 303, so that the current conduction inside the air-break circuit breaker can be realized.

In order to facilitate the insertion of the spacer 301 into the mounting groove 127, a chamfer is provided at the opening of the mounting groove 127, and by providing the chamfer, the assembly of the spacer and the base is facilitated for an operator, and the working efficiency of the operator for completing the assembly of the spacer and the base is improved.

According to a second aspect of the embodiment of the present utility model, there is provided an electrical leakage breaker, including an electrical leakage operation mechanism 204, an electrical leakage trip mechanism and a base according to any of the foregoing embodiments, wherein the electrical leakage operation mechanism 204 is mounted on an operation mechanism mounting portion 103 in the base, and the electrical leakage trip mechanism is disposed on a preset mounting portion 102 in the base and is limited by an electrical leakage limit structure to avoid an idle limit structure.

According to the leakage breaker provided by the embodiment of the utility model, the base provided by any one of the embodiments is used, so that the design and manufacture of the base for the leakage breaker are avoided, the design cost of the leakage breaker is saved, and the working stability and reliability of the leakage breaker can be ensured due to the fact that the leakage limiting structure is arranged in the preset installation part 102 of the base.

According to a third aspect of the embodiment of the present utility model, there is provided an air circuit breaker including an air-break operating mechanism 303, an air-break trip mechanism, and the base of any of the above embodiments, wherein the air-break operating mechanism 303 is mounted on an operating mechanism mounting portion 103 in the base, and the air-break trip mechanism is disposed on a preset mounting portion 102 in the base and is limited by an air-break limit structure to avoid the air-break limit structure.

According to the air-break circuit breaker provided by the embodiment of the utility model, the base provided by any one of the embodiments is used, so that the base is prevented from being designed and manufactured for the air-break circuit breaker, the design cost of the air-break circuit breaker is saved, and the working stability and reliability of the air-break circuit breaker can be ensured due to the air-break limiting structure arranged in the preset mounting part 102 of the base.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps other than those listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The utility model may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of first, second, third, etc. does not denote any order, and the words are to be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specifically stated.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A base, the base comprising:

a wiring part for connecting an external wire;

an operating mechanism mounting part for mounting an electric leakage operating mechanism or an idle operating mechanism;

the electric leakage limiting structure is used for limiting the position of the electric leakage tripping mechanism and avoiding interference between the electric leakage tripping mechanism and the idle limiting structure; the idle release limiting structure is used for limiting the position of the idle release tripping mechanism and avoiding interference between the idle release tripping mechanism and the electric leakage limiting structure.

2. The base of claim 1, wherein the leakage tripping mechanism comprises a circuit board and a housing, the circuit board is disposed in the housing, an opening of the housing faces the base, the leakage limiting structure comprises a first limiting structure and a second limiting structure,

the housing is placed between the first limiting structure and the second limiting structure, so that the first limiting structure and the second limiting structure limit the position of the housing along two opposite sides of the housing.

3. The base of claim 2, wherein the first and/or second limit structures are provided as limit ribs or limit plates.

4. The base of claim 3, wherein the leakage limiting structure further comprises a third limiting structure, the first limiting structure, the second limiting structure and the third limiting structure are distributed in a triangle shape, and the housing is placed between the first limiting structure, the second limiting structure and the third limiting structure so as to limit the position of the housing in three directions respectively.

5. The base according to claim 4, characterized in that the first and/or the second and/or the third limit structure is/are provided with a chamfer at the end remote from the base bottom wall on the side contacting the housing.

6. The base of any one of claims 2 to 5, wherein the leakage limiting structure further comprises a first boss provided on the base bottom wall, and a first mounting hole provided on the first boss, the first boss being provided avoiding the open limiting structure, the housing being connected to the base through the first mounting hole.

7. The base of claim 6, wherein the leakage tripping mechanism further comprises a current transformer, the leakage limiting structure further comprises a second boss arranged on the bottom wall of the base, and a second mounting hole arranged on the second boss, the second boss is arranged avoiding the space-saving limiting structure and the area between the first limiting structure and the second limiting structure, and the current transformer is connected with the base through the second mounting hole.

8. The base of claim 1, wherein the open-stop structure comprises a mounting slot for plugging a spacer plate for separating and spacing adjacent two open-stop trip mechanisms.

9. An earth leakage breaker, characterized by comprising an earth leakage operation mechanism, an earth leakage trip mechanism and the base of any one of claims 1-8, wherein the earth leakage operation mechanism is mounted on the operation mechanism mounting portion in the base, and the earth leakage trip mechanism is provided on the preset mounting portion in the base.

10. An air circuit breaker characterized by comprising an air-break operating mechanism, an air-break trip mechanism and the base of any one of claims 1-8, wherein the air-break operating mechanism is mounted on the operating mechanism mounting portion in the base, and the air-break trip mechanism is disposed on the preset mounting portion in the base.