CN117832031A - Protection parameter modularization adjustable circuit breaker - Google Patents

Abstract

The application discloses a protection parameter modularization adjustable circuit breaker, which comprises a shell, an electromagnetic system, an operating mechanism and a main loop conductor, wherein the electromagnetic system, the operating mechanism and the main loop conductor are positioned in the shell, the electromagnetic system comprises a framework, a coil, a movable iron core, a static iron core, a spring and a push rod, the push rod is fixed on the movable iron core or is an integral piece with the movable iron core, and when a circuit to be protected is short-circuited, the static iron core attracts the movable iron core to move so that the push rod drives the operating mechanism to execute a brake separating operation; wherein, a mounting area is arranged in the shell and is arranged on at least one side of the electromagnetic system in the length direction; the installation area can be used for placing a magnetic conduction device, and the magnetic conduction device is magnetized under the action of current flowing through the main loop conductor to generate electromagnetic force on the movable iron core so as to change the short-circuit protection parameters of the circuit breaker; the application has the characteristic of greatly reducing materials.

Description

Protection parameter modularization adjustable circuit breaker

Technical Field

The application relates to the field of low-voltage electricity, in particular to a circuit breaker with modularized adjustable protection parameters.

Background

The miniature circuit breaker is widely applied, and can be applied to the household field and the industrial field. According to the related standards of the circuit breaker, such as related product standards of GB/T14048.2, GB/T10963.1IEC60947-2, IEC60898 and the like, the instantaneous tripping (also called short-circuit protection) of the circuit breaker can be divided into an R-type circuit breaker, a B-type circuit breaker, a C-type circuit breaker, a K-type circuit breaker and a D-type circuit breaker according to the tripping modes. For example, the tripping range of the R-type circuit breaker is 1.5-3.0 times of In, the tripping range of the B-type circuit breaker is 3-5 times of In (containing 5 times), the tripping range of the C-type circuit breaker is 5-10 times of In (containing 10 times), the tripping range of the K-type circuit breaker is 8-14 times of In, and the tripping range of the D-type circuit breaker is 10-20 times of In (containing 20 times).

For small circuit breakers, the instantaneous tripping is completed by means of an electromagnetic system (comprising a framework, a coil, a static iron core, a movable iron core, a magnetic yoke, a spring and a push rod), when a short circuit occurs, the static iron core attracts the movable iron core to act (the principle of an electromagnet), so that the push rod impacts a lock catch of an operating mechanism to enable the operating mechanism to execute a brake separating operation. The specifications of the electromagnetic systems of the different types of circuit breakers are different (there are variations in the dimensions of the components that are embodied in the electromagnetic systems of the different types of circuit breakers). Manufacturers are required to prepare materials of electromagnetic systems of various specifications for various types of circuit breakers, for example, for 4 types of circuit breakers, for example, 9 materials (respectively, a framework, a coil, a static iron core, a moving iron core, a magnetic yoke, a spring and a push rod) are required to prepare the electromagnetic system of one circuit breaker, and then more than 30 materials are required to prepare the 4 types of circuit breakers. The preparation of such a large amount of material for production not only causes an increase in production cost but also causes great influence on material management and production management.

Therefore, how to design a new type of circuit breaker to reduce the material quantity of different types of circuit breaker electromagnetic systems as much as possible is a direction worthy of research.

Disclosure of Invention

In view of this, the object of the present application is to overcome the defects in the prior art, and to provide a circuit breaker with modularized adjustable protection parameters, which can reduce the amount of materials by adjusting the short-circuit protection parameters.

The application provides a circuit breaker with modularized and adjustable protection parameters, which comprises a shell, an electromagnetic system, an operating mechanism and a main loop conductor, wherein the electromagnetic system, the operating mechanism and the main loop conductor are positioned in the shell, the electromagnetic system comprises a framework, a coil, a movable iron core, a static iron core, a spring and a push rod, the push rod is fixed on the movable iron core or is an integral piece with the movable iron core, and when a circuit to be protected is short-circuited, the static iron core attracts the movable iron core to move so that the push rod drives the operating mechanism to execute a brake separating operation; wherein, a mounting area is arranged in the shell and is arranged on at least one side of the electromagnetic system in the length direction; the installation area can be used for placing a magnetic conduction device, and the magnetic conduction device is magnetized under the action of current flowing through the main loop conductor to generate electromagnetic force on the movable iron core so as to change the short-circuit protection parameters of the circuit breaker.

With this structure, since the installation area is provided, the magnetic conduction device can be provided in the installation area. When no magnetic conduction device is arranged in the installation area, and short circuit occurs, the static iron core attracts the moving iron core to move to realize tripping, and the electromagnetic system is equivalent to realizing short circuit protection in a first tripping mode. When the magnetic conduction device is placed in the installation area, the main loop is provided with current, and the magnetic conduction device can be magnetized to generate electromagnetic force to the movable iron core under the action of the current, so that the short-circuit protection parameter is changed due to the influence of the electromagnetic force (simply, the short-circuit protection parameter can be understood as being changed by changing the total magnetic force applied to the movable iron core), namely, the type of the circuit breaker is changed. The structure sets up like this, can realize at least that 2 kinds of circuit breakers that trip mode is different possess the electromagnetic system of same material, and the difference between the two is only in magnetic conduction device, compares with prior art, can effectively reduce the material, reduction in production cost is favorable to production and material management.

In some embodiments of the present application, the number of the installation areas is two, and the installation areas are respectively arranged on two sides of the length direction of the electromagnetic system, wherein one installation area is located on one side of the electromagnetic system, which is close to the operating mechanism, and the other installation area is located on one side of the electromagnetic system, which is far away from the operating mechanism; when the magnetic conduction device is arranged in the installation area close to the operating mechanism, the electromagnetic force direction of the magnetic conduction device to the movable iron core is the same as the attractive force direction of the static iron core to the movable iron core, so that the short-circuit protection parameters of the circuit breaker are reduced; when the magnetic conduction device is arranged in the installation area far away from the operating mechanism, the electromagnetic force direction of the magnetic conduction device to the movable iron core is opposite to the attractive force direction of the static iron core to the movable iron core, and the electromagnetic force is smaller than the attractive force, so that the short-circuit protection parameter of the circuit breaker is improved.

By adopting the arrangement of two installation areas, at least three different setting modes of the magnetic conduction device can be presented (actually, a user can set different magnetic conduction devices to realize more setting modes), and at least three different tripping mode circuit breakers (actually, more than three tripping modes can be presented). Assuming that the magnetic conductive devices are unified, the following three ways can be implemented: 1. in the first mode, no magnetic conduction device is arranged, and at the moment, the tripping mode of the circuit breaker is the first mode, for example, the short-circuit protection parameter is X times In (In is the rated current of the circuit breaker, that is, when the current on the main circuit reaches X times In, the attraction force of the static iron core to the movable iron core is larger than the acting force of the spring, and the movable iron core acts, so that the ejector rod impacts the operating mechanism to realize opening. 2. In the second mode, when the magnetic conduction device is disposed In the installation area near the operating mechanism, the tripping mode of the circuit breaker is the second mode, for example, the short-circuit protection parameter is Y times In (Y will be smaller than X because the electromagnetic force of the magnetic conduction device and the attractive force of the static iron core are the same, the electromagnetic force and the attractive force of the static iron core are overlapped, and the spring force is constant, so that the circuit breaker moves under the smaller In times, and the ejector rod impacts the operating mechanism to realize the opening. 3. When the magnetic conduction device is arranged In an installation area far away from the operating mechanism, the tripping mode of the circuit breaker is the third mode, for example, the short-circuit protection parameter is Z times In (Z is larger than X, because the electromagnetic force of the magnetic conduction device and the attractive force of the static iron core are opposite, the spring force is constant, the attractive force of the static iron core to the dynamic iron core needs to overcome the spring force and the electromagnetic force of the magnetic conduction device at the same time, and therefore, the greater In times are needed to move, so that the ejector rod can impact the operating mechanism to realize the switching off.

In some embodiments of the present application, the housing is provided with a placement opening that communicates with the mounting area, and the magnetic conductive device may be installed in the mounting area through the placement opening.

By adopting the structure, the placing port is formed in the shell, the circuit breaker can be produced in the first tripping mode, and when the tripping mode needs to be changed, the tripping mode of the circuit breaker can be changed only by installing the magnetic conduction device, so that the circuit breaker is very convenient to produce and manage and control.

In some embodiments of the present application, the housing is provided with a placement opening communicated with the installation area, and the magnetic conductive device can be installed in the installation area through the placement opening, and further comprises a sealing cover, wherein the sealing cover is detachably fixed with the housing and used for sealing the placement opening.

By adopting the structure, the arrangement of the placing opening is very convenient for production and control, and the arrangement of the sealing cover is favorable for sealing the placing opening and improving the insulating property of the product.

In some embodiments of the present application, an identifier is disposed on the housing at the placement opening, where the identifier is used to refer to a short-circuit protection parameter or a tripping mode of the circuit breaker.

By adopting the structure, the arrangement of the mark is beneficial to the workers to know the positions of the magnetic conduction devices corresponding to the circuit breakers in different tripping modes, thereby facilitating the placement of the magnetic conduction devices by the workers.

In some embodiments of the present application, the magnetic conductive device is a magnetic conductive sheet, the number of the magnetic conductive sheets is at least one, the magnetic conductive sheet is disposed in the mounting area in such a manner that the thickness direction of the magnetic conductive sheet is parallel to the length direction of the mounting area, and the thickness dimension of the magnetic conductive sheet is smaller than the dimension of the mounting area in the length direction.

By adopting the structure, the magnetic conduction sheet is arranged in the thickness direction, so that the acting direction of electromagnetic force generated by the magnetic conduction sheet is more close to the attractive force direction of the static iron core, and the design is convenient. Meanwhile, by the stacking mode, huo Mli and Lorentz magnetic force technology principles are fully utilized, the effect of current limiting coefficient can be improved, electromagnetic force can act on arcs of the movable contact and the fixed contact more easily, the arc is prolonged, and the arc extinguishing speed is improved.

In some embodiments of the present application, the number of magnetic conductive sheets is greater than two, and the magnetic conductive device further includes an insulating spacer disposed between adjacent magnetic conductive sheets.

The arrangement of the insulating partition plate can ensure that a certain insulating gap exists between adjacent magnetic conducting sheets, can compensate for roughness precision errors in the punching process, and can reduce vortex as much as possible. The heating of the product is reduced, and the reliability of the product is improved.

In some embodiments of the present application, the insulating spacer is secured to the housing.

In some embodiments of the present application, the insulating barrier is part of the housing.

In some embodiments of the present application, the insulating spacer is connected to the magnetically permeable sheet.

The insulating partition plate is arranged in a plurality of modes, can be manufactured independently and then fixed on the shell, can be integrally formed with the shell, can be directly assembled with the magnetic conductive sheets, can realize the purpose of ensuring the existence of insulating gaps between adjacent magnetic conductive sheets in any mode, and can reduce vortex as far as possible.

In some embodiments of the present application, the thickness of the insulating barrier is 0.1mm to 1.2mm.

The insulating partition board can effectively reduce eddy current by adopting 0.1mm-1.2mm.

In some embodiments of the present application, the magnetic conductive sheet is one or two, and the installation area further includes a space portion not placed by the magnetic conductive device, and the space portion is filled with the insulating filling member.

By adopting the structure, when a small number of magnetic conducting sheets are adopted (one or two magnetic conducting sheets) and the mounting area is not fully filled with the magnetic conducting sheets, the insulating filling piece can be utilized to fill the spare part, so that the mounting stability of the magnetic conducting sheets is improved.

In some embodiments of the present application, the magnetic conductive sheet is three or more sheets, and the size of the magnetic conductive device is consistent with the size of the mounting area.

By adopting the structure, when the number of the magnetic conduction sheets is three or more, the size of the magnetic conduction device is matched with the size of the installation area, that is to say, the magnetic conduction device can be filled in the installation area, so that the magnetic conduction device has better stability.

In some embodiments of the present application, the thickness of the magnetic conductive sheet is 1mm to 3mm.

The thickness of the magnetic conduction sheet is 1mm-3mm, and the magnetic conduction sheet in the interval has better magnetic conductivity, better magnetic induction intensity and lower magnetic flux loss.

In some embodiments of the present application, the magnetic conductive sheet is made of a soft magnetic material.

Soft magnetic materials are typically ferrous metals, alloys, such as carbon steel, ferrite, silicon steel, and the like.

The magnetic conducting sheet is made of soft magnetic material, and the soft magnetic material can be carbon steel or silicon steel.

In some embodiments of the present application, the shape of the magnetic conductive sheet is a regular pattern or an irregular pattern.

With this structure, the shape of the magnetic conductive sheet can be varied as long as it can be installed in the installation area, and it can be either regular or irregular.

In some embodiments of the present application, the magnetic conduction device is provided with a through hole, an axial direction of the through hole is parallel to a moving direction of the moving iron core, a cross-sectional area of the through hole is larger than a cross-sectional area of the moving iron core, and the moving iron core is surrounded by the through hole when seen from a direction perpendicular to the moving direction of the moving iron core.

The through hole arrangement with the structure has an avoidance effect, for example, when the magnetic conduction device is arranged close to the operating mechanism, the ejector rod (the cross section area of the ejector rod is necessarily smaller than that of the movable iron core, which is common knowledge in the field) can penetrate through the magnetic conduction device to trigger the operating mechanism.

In some embodiments of the present application, the magnetic conduction device is provided with a through hole, the axis direction of the through hole is parallel to the moving direction of the moving iron core, the cross-sectional area of the through hole is larger than the cross-sectional area of the ejector rod, and the ejector rod is surrounded by the through hole when seen from the direction perpendicular to the moving direction of the moving iron core.

The through hole arrangement with the structure has an avoidance effect, for example, when the magnetic conduction device is arranged close to the operating mechanism, the ejector rod can penetrate through the magnetic conduction device to trigger the operating mechanism.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows an exploded view of a circuit breaker according to an embodiment of the present application;

fig. 2 shows an internal schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 3 shows a schematic structural diagram of a main loop conductor of a circuit breaker according to an embodiment of the present application;

fig. 4 shows a schematic structural diagram of an electromagnetic system of a circuit breaker according to an embodiment of the present application;

fig. 5 shows a schematic structural view of one embodiment of the magnetic conduction device (three magnetic conduction sheets) of the present application;

FIG. 6 illustrates a force diagram of the electromagnetic system when the magnetic flux device of the circuit breaker of the embodiments of the present application is placed near the operating mechanism side;

FIG. 7 illustrates a force diagram of the electromagnetic system when the magnetic flux device of the circuit breaker of the embodiments of the present application is positioned away from the operating mechanism side;

fig. 8 is a schematic view showing a position of a circuit breaker according to an embodiment of the present application, in which a sheet of magnetic conductive sheet and an insulating filler are placed;

fig. 9 shows a schematic structural diagram of a circuit breaker according to an embodiment of the present application (initially a C-type circuit breaker) without a magnetic device;

fig. 10 is a schematic diagram showing a structure of a circuit breaker according to an embodiment of the present application, in which a placement magnetic device is converted into a B-type circuit breaker;

fig. 11 is a schematic structural diagram of a circuit breaker according to an embodiment of the present application, in which a placement magnetic device of the circuit breaker is converted into a K-type circuit breaker;

fig. 12 shows a schematic structural diagram of a circuit breaker according to an embodiment of the present application, in which a placement magnetic device is converted into a D-type circuit breaker.

Description of the embodiments

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that 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 orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Examples

As shown in fig. 1-12, an embodiment of the present application is a circuit breaker with modularly adjustable protection parameters, which includes a connection terminal 100, a main loop conductor, an operating mechanism 200, an arc extinguishing structure 300, an electromagnetic system 400, and a housing.

The terminal 100 includes a first terminal and a second terminal, and in this embodiment, the screw type terminal 100 is used as the terminal 100. The terminal 100 may be a cage terminal 100, or a clip-type structure, in addition to the screw-type terminal 100, as long as the circuit breaker can be connected to the circuit to be protected, regardless of the type of terminal 100.

The main loop conductor includes, in the present embodiment, a first wiring board 101, a stationary contact 102, a movable contact 103, and a second wiring board 104. One end of the first wiring board 101 is electrically connected with the first terminal, the other end of the first wiring board 101 is electrically connected with one end of the coil 402, and the other end of the coil 402 is electrically connected with the fixed contact 102. The movable contact 103 is connected with one end of the bimetallic strip 500 through flexible connection, the bimetallic strip 500 is electrically connected with one end of the second wiring board 104, and the second wiring board 104 is electrically connected with the second terminal. When the operating mechanism 200 is in the closing state, the moving contact 103 contacts the fixed contact 102, and at this time, the main circuit is turned on, and current flows in the main circuit. When the operating mechanism 200 is in the opening state, the moving contact 103 is separated from the fixed contact 102, and at this time, the main circuit is opened, so that no current flows in the main circuit.

The operating mechanism 200 in this embodiment includes a handle, a U-shaped rod, a trip button, a lock catch 201, a mechanism spring, a contact support, and other components to form a four-bar mechanism, and when the operating mechanism 200 is in a closed state, the lock catch 201 and the trip button are engaged to form a stable state, so that the operating mechanism 200 is kept in the closed state. When the state between the lock catch 201 and the jump buckle is broken (the breaking can be the breaking of the manual control handle rotation, the breaking of the double-gold bending driving the lock catch 201 to move when overload occurs, or the breaking of the push rod 406 of the electromagnetic system 400 driving the lock catch 201 to move when short circuit occurs), the operating mechanism 200 is restored to the opening state. When reclosing is needed after the fault is removed, the handle is only required to be pulled to enable the lock catch 201 and the jump buckle to be meshed to form a stable state. Of course, although the example is described here with a trip, the invention is not limited to this type of operation, but is intended to include an operation without a trip.

The arc extinguishing structure 300, including arc extinguishing bars, is distributed near the moving and stationary contacts 102 for extinguishing an arc.

Electromagnetic system 400 includes armature 401, coil 402, moving core 403, stationary core 404, spring 405, and plunger 406. The coil 402 is wound outside the framework 401, the movable iron core 404 and the static iron core 404 are arranged inside the framework 401, the ejector rod 406 is fixed with the movable iron core 403, and one end of the ejector rod 406 penetrates through the static iron core 404 and can extend out of the static iron core 404. The spring 405 is disposed between the moving core 403 and the static core 404 to provide a spring force, when the main circuit is shorted, the attractive force of the static core 404 to the moving core 403 is greater than the spring force, and the ejector rod 406 slides to trigger the lock catch 201, so that the operating mechanism 200 performs the opening operation. Here, the ejector rod 406 may be integrally formed, in addition to being fixed to the movable core 403.

The housing comprises a base 601 and an upper cover 602, wherein the base 601 and the upper cover 602 cooperate to form a space for installing the wiring terminal 100, the main circuit conductor, the operating mechanism 200, the arc extinguishing structure 300, the electromagnetic system 400 and other components. Here, the upper cover 602 and the base 601 are fixed by riveting, in addition to the above, the upper cover and the base 601 may be fastened by a snap or screw, or even fastened by a screw and fastened by a snap, and fastened by a screw and fastened by a snap, so long as the housing can be ensured to form a stable assembly structure.

Here, when the electromagnetic system 400 is only installed in the circuit breaker, the trip mode thereof is the first trip mode (for example, the trip mode may be a trip mode of a C-type circuit breaker, which is not necessarily the trip mode of the C-type circuit breaker, but the trip mode of the C-type circuit breaker is taken as an example, and the following description of the B-type circuit breaker, the K-type circuit breaker, and the D-type circuit breaker is not merely a simple example, for the sake of understanding the inventive concept of the present application).

In order to realize that more types (more types herein do not mean very much, but only that they satisfy at least two types of circuit breakers) of the same specification can use the electromagnetic system 400, a mounting region S1 is provided in the housing, the mounting region S1 is provided on at least one side in the length direction L of the electromagnetic system 400, and by using the mounting region S1 for placing the magnetic conductive device 700, the electromagnetic force to the moving core 403 can be generated by magnetization of the magnetic conductive device 700 (under the action of the current flowing through the main loop conductor), thereby changing the short-circuit protection parameters of the circuit breaker (also referred to as changing the type of the circuit breaker). The magnetic conduction device 700 may be directly or indirectly connected to the housing, for example, the magnetic conduction device 700 may be naturally restricted and stably fixed after the base 601 and the upper cover 602 are assembled, or the magnetic conduction device 700 may be separately fixed to the base 601 or fixed to the upper cover 602. The indirect connection means that the magnetic conduction device 700 is mounted on a mounting bracket, for example, and the mounting bracket is fastened to the housing.

How the type of the circuit breaker is changed here can be classified into the following three cases according to the position of the installation area S1:

in the first case, the number of the installation areas S1 is one, the installation areas S1 are disposed on the side of the electromagnetic system 400 close to the operating mechanism 200, after the magnetic conduction device 700 is placed, the magnetic conduction device 700 generates electromagnetic force, where the direction of the electromagnetic force F2 is consistent with the direction of the attractive force F1 of the static iron core 404 to the moving iron core 403, and the spring force is constant (the specification of the spring 405 is unchanged, and the acting force of the spring 405 is unchanged), at this time, the force (including the electromagnetic force F2 and the attractive force F1) attracting the moving iron core 403 is changed, which is equivalent to that the moving iron core 403 acts under a smaller In multiple, and thus the short-circuit protection parameter (for example, the tripping mode of the original C-type circuit breaker can be changed into the tripping mode of the B-type circuit breaker).

In the second case, the number of the installation areas S1 is also one, the installation areas S1 are disposed on the side of the electromagnetic system 400 away from the operating mechanism 200, after the magnetic conduction device 700 is placed, the magnetic conduction device 700 generates electromagnetic force, where the direction of the electromagnetic force is opposite to the direction of the attractive force F1 of the static iron core 404 to the moving iron core 403, and the spring force is constant (the specification of the spring 405 is unchanged, and the acting force of the spring 405 is unchanged), so that the moving iron core 403 needs to move, and the electromagnetic force F2 and the spring force need to be overcome at the same time, which is equivalent to that the moving iron core 403 can only act under a larger In multiple, so that the short-circuit protection parameter (for example, the tripping mode of the original C-type circuit breaker can be changed into the tripping mode of the D-type circuit breaker).

In case three, as shown in fig. 2,6-7, the number of mounting areas S1 is two, one being disposed on the side of the electromagnetic system 400 remote from the operating mechanism 200 and the other being disposed on the side of the electromagnetic system 400 close to the operating mechanism 200. When the user places the magnetic conducting device 700 on the side close to the operating mechanism 200, this is equivalent to reducing the short-circuit protection parameter (see case one for specific principles); when the user places the magnetic conduction device 700 at a side far away from the operating mechanism 200, the short-circuit protection parameter is improved (see the second principle of the specific principle) and the third situation is the embodiment shown in fig. 2 and 6-7, and the first and second situations can be understood by referring to two setting manners of the magnetic conduction device 700 of the third situation.

Through the arrangement of the installation area S1 and the magnetic conduction device 700, at least two different types of circuit breakers (the first case and the second case are at least two, the third case is multiple, for example, the types of 4 types of circuit breakers) can be realized, the same electromagnetic system 400 can be adopted, and only the differences of the magnetic conduction device 700 are arranged among the different types of circuit breakers, so that the universality of materials can be greatly improved, the types of materials are reduced, and the production is facilitated.

To facilitate the assembly of the circuit breaker by a worker, the type of the circuit breaker is changed, a placement port 604 is opened in the housing, and the placement port 604 is positioned corresponding to the installation area S1. That is, in the first and second cases, the number of the placement ports 604 is one, corresponding to the position of the mounting area S1. In case three, the number of the placement ports 604 will be two, corresponding to the positions of the two mounting areas S1, respectively. The placement ports 604 may be formed in the upper cover 602 or in the base 601, and in this embodiment, two placement ports 604 are formed in the upper cover 602. The design of the placement opening 604 allows a worker to directly install the first type of circuit breaker, and the type of circuit breaker can be changed by directly using the magnetic conduction device 700 from the placement opening 604, so that the production and the assembly are very convenient. As a preferred solution of the placement opening 604, a cover 605 is further disposed at the placement opening 604, the cover 605 is used for closing the placement opening 604, and the cover 605 is detachably fixed with the housing, where the detachable fixation may be a snap connection, an adhesive, a screw fastening, or the like, so long as the cover can be removed to expose the placement opening 604. As a preferred solution that can facilitate the worker to identify the type of the circuit breaker, a mark 606 is provided on the housing, where the mark 606 is located beside the placement opening 604, and is used to refer to a short-circuit protection parameter or a tripping mode of the circuit breaker. The indicia 606 here may be laser marked or decal or injection molded. The logo 606 may be letters, words, icons. For example, the letter B at the placement port 604 indicates that the circuit breaker will be a B-type circuit breaker when the magnetic device 700 is installed. For example, the identifier 606 at the placement port 604 is 10ln, and then the short-circuit protection parameter of the circuit breaker after the magnetic conduction device 700 is placed is 10ln (ln is the rated current of the circuit breaker).

The magnetic conduction device 700 can be in the form of a magnetic conduction sheet 701 or a magnetic conduction block. Taking the form of the magnetic conductive plates 701 as an example, the number of the magnetic conductive plates 701 is at least one, the electromagnetic force generated by the magnetic conductive plates 701 is different according to the number of the magnetic conductive plates 701, and the change of the short-circuit protection parameter, that is, the change of the breaker type, is also different. Here, the magnetic conductive sheet 701 is disposed in the mounting region S1 in such a manner that its thickness direction is parallel to the length direction L of the mounting region S1, and the thickness dimension of the magnetic conductive sheet 701 is smaller than the dimension in the length direction L of the mounting region S1. The magnetic conductive sheet 701 is arranged in this way, which can achieve the current limiting effect, because the magnetic field generated by the magnetic conductive sheet 701 is beneficial to the elongation of the electric arc and the rapid extinction of the electric arc.

The thickness of the magnetic sheet 701 is selected to be large, for example, 1mm, 1.2mm, 1.5mm, 1.9mm, 2mm, 2.3mm, 2.5mm, 2.7mm, 2.9mm, 3mm. As long as it is satisfied that for example 1mm-3mm,

the magnetic conductive sheet 701 in such a thickness range has a preferable magnetic permeability, a preferable magnetic induction intensity, and a lower magnetic flux loss.

The magnetic conductive sheet 701 is made of a soft magnetic material, and the soft magnetic material refers to a metal or an alloy containing iron, such as carbon steel (e.g., Q235A, 10#, 45 #), ferrite, silicon steel, etc., and in this embodiment, Q235A carbon steel is used.

The shape of the magnetic sheet 701 is also various, and may be regular or irregular as long as it is stably mounted in the mounting region S1. In this embodiment, the magnetic conductive sheet 701 has a shape resembling a "convex" shape.

In the present embodiment, when the number of magnetic conductive sheets 701 is greater than two, the insulating separator 702 is provided between the adjacent magnetic conductive sheets 701, and the insulating separator 702 is provided to reduce eddy current as much as possible. The thickness of the insulating spacer 702 is selected to be a large number, for example, 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.44mm, 0.56mm, 0.75mm, 0.8mm, 0.89mm, 0.98mm, 1.1mm, 1.2mm, or the like, as long as it is 0.1mm to 1.2mm.

The insulating spacer 702 may be provided in a number of forms, and may be integrally formed with (i.e., part of) the housing, or may be separately formed and then secured to the housing or attached to the magnetic sheet 701. In the present embodiment, the insulating spacer 702 is connected to the magnetic conductive sheet 701, and the insulating spacer 702 and the magnetic conductive sheet 701 may be provided with through holes 703, which may be attached by other means. Of course, the insulating separator 702 may be connected to the magnetic conductive sheet 701 in other manners, for example, one of the magnetic conductive sheet 701 and the insulating separator 702 is provided with a convex hull, the other is provided with a concave, and the magnetic conductive sheet 701 and the insulating separator 702 are connected to the concave through the convex hull, or an insulating frame is provided to cover the magnetic conductive sheet 701 and the insulating separator 702, so long as the insulating separator 702 and the magnetic conductive sheet 701 can be connected in any manner.

In the present embodiment, the dimension in the longitudinal direction L of the mounting region S1 is exactly equal to the thickness of the three magnetic conductive sheets 701 and the two insulating spacers 702, that is, exactly fills the mounting region S1. As shown in fig. 7, when only one magnetic conductive sheet 701 or two magnetic conductive sheets 701 are provided in the mounting region S1, the mounting region S1 has a free portion not filled with the magnetic conductive sheets 701, and the insulating filler 800 may be inserted to fill the free portion. The insulating filler 800 may be made of any insulating material, such as rubber, plastic, or the like. The shape of the insulating filler 800 is also various, for example, a rectangular parallelepiped, a column shape, etc., as long as filling of the vacant part can be satisfied. Of course, the dimension of the mounting region S1 in the longitudinal direction L may be larger, for example, three or more magnetic conductive sheets 701 may be provided to fill the mounting region S1.

The magnetic conduction device 700 (i.e., the magnetic conduction sheet 701) is further provided with a through hole 704, wherein the axial direction of the through hole 704 is parallel to the moving direction of the moving core 403, and the cross-sectional area of the through hole 704 is larger than the cross-sectional areas of the ejector rod 406 and the moving core 403, and the ejector rod 406 is surrounded by the through hole 704 when seen from the direction perpendicular to the moving direction of the moving core 403. That is, when the magnetic conduction device 700 is disposed on a side close to the operating mechanism 200, the ejector rod 406 can pass through the through hole 704 to drive the operating mechanism 200, where the through hole 704 can have an avoidance effect. Of course, the cross-sectional area of the through hole 704 may be larger than the cross-sectional area of the moving core 403, because the cross-sectional area of the ejector rod 406 is necessarily larger than the cross-sectional area of the moving core 403, so that the ejector rod 406 can pass through.

The following illustrates the manner in which the four types of circuit breakers share the same electromagnetic system 400 to enhance the understanding of the present application.

As shown In fig. 9, when the circuit breaker is initially a C-type circuit breaker, the electromagnetic system 400 satisfies the tripping mode of the C-type circuit breaker, that is, the tripping range is 5-10 times In (10 times In).

When it is necessary to change to a B-type circuit breaker, as shown In fig. 10, three pieces (not necessarily three pieces, but a specific number may be actually selected according to the parameters of the magnetic conductive pieces 701, and the following description of the number of the magnetic conductive pieces 701 will be understood In the same manner) are provided In the installation area S1 near the operating mechanism 200, and at this time, the electromagnetic force is In the same direction as the attraction force of the static iron core 404 to the moving iron core 403, so that the C-type circuit breaker is modified to the B-type circuit breaker, that is, the trip range is 3-5 times In (including 5 times In).

When it is necessary to change to a K-type circuit breaker, as shown In fig. 11, two magnetic conductive sheets 701 (the actual number of which can be selected according to the parameters of the magnetic conductive sheets 701) are disposed In the installation area S1 far from the operating mechanism 200, and at this time, the electromagnetic force is opposite to the attraction force of the static iron core 404 to the moving iron core 403, so that the C-type circuit breaker is modified to the K-type circuit breaker, that is, the trip range is 8-14 times In.

When it is necessary to change to a D-type circuit breaker, as shown In fig. 12, three magnetic conductive sheets 701 (the actual number of which can be selected according to the parameters of the magnetic conductive sheets 701) are provided In the installation area S1 away from the operating mechanism 200, and at this time, the electromagnetic force is opposite to the attraction force of the static iron core 404 to the moving iron core 403, so that the C-type circuit breaker is modified to the D-type circuit breaker, that is, the trip range is 10-20 times In (including 20 times).

By the mode, the electromagnetic system 400 universal for the four types of circuit breakers can be realized, and the material quantity, the production cost and the management cost are greatly reduced.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. The circuit breaker with the modularized adjustable protection parameters comprises a shell, an electromagnetic system, an operating mechanism and a main loop conductor, wherein the electromagnetic system, the operating mechanism and the main loop conductor are positioned in the shell, the electromagnetic system comprises a framework, a coil, a movable iron core, a static iron core, a spring and a push rod, the push rod is fixed on the movable iron core or is integrated with the movable iron core, and when a circuit to be protected is short-circuited, the static iron core attracts the movable iron core, so that the push rod drives the operating mechanism to execute a brake separating operation; the method is characterized in that: a mounting area is arranged in the shell and is arranged on at least one side of the electromagnetic system in the length direction; the installation area can be used for placing a magnetic conduction device, and the magnetic conduction device is magnetized under the action of current flowing through the main loop conductor to generate electromagnetic force on the movable iron core so as to change the short-circuit protection parameters of the circuit breaker.

2. A circuit breaker with modularly adjustable protection parameters according to claim 1, characterized in that: the two mounting areas are respectively arranged on two sides of the length direction of the electromagnetic system, one of the two mounting areas is positioned on one side of the electromagnetic system, which is close to the operating mechanism, and the other mounting area is positioned on one side of the electromagnetic system, which is far away from the operating mechanism; when the magnetic conduction device is arranged in the installation area close to the operating mechanism, the electromagnetic force direction of the magnetic conduction device to the movable iron core is the same as the attractive force direction of the static iron core to the movable iron core, so that the short-circuit protection parameters of the circuit breaker are reduced; when the magnetic conduction device is arranged in the installation area far away from the operating mechanism, the electromagnetic force direction of the magnetic conduction device to the movable iron core is opposite to the attractive force direction of the static iron core to the movable iron core, and the electromagnetic force is smaller than the attractive force, so that the short-circuit protection parameter of the circuit breaker is improved.

3. A circuit breaker with modularly adjustable protection parameters according to claim 1 or 2, characterized in that: the shell is provided with a placement opening communicated with the installation area, and the magnetic conduction device can be installed in the installation area through the placement opening;

or, set up on the casing with the installation region intercommunication place the mouth, magnetic conduction device can be installed in the installation region by placing the mouth, still includes the closing cap, and the closing cap is the detachable fixed mouth of placing that is used for sealing with the casing.

4. A circuit breaker with modularly adjustable protection parameters according to claim 3, characterized in that: the shell is provided with a mark at the place opening, and the mark is used for indicating a short-circuit protection parameter or a tripping mode of the circuit breaker.

5. A circuit breaker with modularly adjustable protection parameters according to claim 1 or 2, characterized in that: the magnetic conduction device is magnetic conduction pieces, the number of the magnetic conduction pieces is at least one, the magnetic conduction pieces are arranged in the installation area in a mode that the thickness direction of the magnetic conduction pieces is parallel to the length direction of the installation area, and the thickness dimension of the magnetic conduction pieces is smaller than the dimension of the installation area in the length direction.

6. A circuit breaker with modularly adjustable protection parameters according to claim 5, characterized in that: the number of the magnetic conducting sheets is greater than two, and the magnetic conducting device further comprises an insulating partition plate arranged between the adjacent magnetic conducting sheets.

7. The protection parameter modularly adjustable circuit breaker according to claim 6, wherein: the insulating partition board is fixed on the shell;

or, the insulating barrier is part of the housing;

or the insulating partition plate is connected with the magnetic conduction sheet;

or the thickness of the insulating separator is 0.1mm-1.2mm.

8. A circuit breaker with modularly adjustable protection parameters according to claim 5, characterized in that: the magnetic conduction sheet is one or two, and the installation area is provided with a vacant part which is not placed by the magnetic conduction device and also comprises an insulating filling piece, wherein the vacant part is filled with the insulating filling piece;

or the number of the magnetic conduction sheets is three or more, and the size of the magnetic conduction device is matched with the size of the installation area.

9. A circuit breaker with modularly adjustable protection parameters according to claim 5, characterized in that: the thickness of the magnetic conductive sheet is 1mm-3mm;

or, the magnetic conduction sheet is made of soft magnetic material;

or, the shape of the magnetic conductive sheet is regular or irregular.

10. A circuit breaker with modularly adjustable protection parameters according to claim 1, characterized in that: the magnetic conduction device is provided with a through hole, the axial direction of the through hole is parallel to the moving direction of the movable iron core, the cross section area of the through hole is larger than that of the movable iron core, and the movable iron core is surrounded by the through hole when seen from the direction perpendicular to the moving direction of the movable iron core;

or, the magnetic conduction device is provided with a through hole, the axial direction of the through hole is parallel to the moving direction of the movable iron core, the cross section area of the through hole is larger than that of the ejector rod, and the ejector rod is surrounded by the through hole when seen from the direction perpendicular to the moving direction of the movable iron core;

or, the magnetic conduction device is directly or indirectly connected with the shell.