Modularized protection switch

Abstract

A modularized protection switch comprises a breaking module and a current-carrying module, the breaking module and the current-carrying module are assembled together to form the modularized protection switch, the breaking module and the current-carrying module are sequentially connected and disconnected with a circuit in a time sequence, and in the process of the breaking module and the current-carrying module are sequentially connected and disconnected with the circuit in a time sequence, the circuit is connected with the current-carrying module in a time sequence. The electric arc is generated at the breaking module, so that the modularized protection switch has high connection and breaking capacity, meanwhile, the breaking module and the current-carrying module can bear larger short-circuit current when the modularized protection switch is switched on, and the modularized protection switch also has high short-time endurance capacity. And through the modularized structure, the corresponding damaged part can be directly replaced once a fault occurs, and the whole protection switch does not need to be detached and replaced, so that the maintenance difficulty is reduced, and the cost is saved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to switch technical field, specifically speaking is related to a protection switch. BACKGROUND

[0002] The renewable clean energy photovoltaic and wind power generation installed capacity continues to improve, the voltage requirement of protection switch gradually improves from 1500V to 3000V, the arc energy produced when the high voltage switch product breaks is extremely high, if the arc cannot be extinguished in time, the high energy borne by the arc extinguishing chamber will burn the moving and static contacts, even the arc extinguishing chamber grid will be burned and fused, and the breaking of short circuit current cannot be completed, thereby causing safety accidents of power generation system;

[0003] In the prior art, the protection switch is mostly a knife switch type plug-in contact, which has high dynamic and thermal stability and can meet higher short time withstand index. However, since the traditional knife switch type plug-in contact is a non-contact structure, the contact cannot resist arc burning when breaking the circuit, so it is difficult to meet the requirement of higher making and breaking capacity. If a contact structure is arranged on the existing traditional knife switch type plug-in contact, it is also difficult to meet the requirement of higher short time withstand index. Moreover, the existing protection switch is a whole, so when maintenance and replacement are needed, the related parts of the whole protection switch need to be disassembled and replaced, thereby increasing the difficulty of maintenance. UTILITY MODEL CONTENTS

[0004] The utility model discloses to the defect that the short time withstand index and higher making and breaking capacity of the existing protection switch cannot be met simultaneously, provide a kind of modularization protection switch, including current-carrying module and breaking module, utilize current-carrying module to guarantee reliable short resistance capacity, simultaneously make arc produce between the contact group of breaking module to guarantee that the protection switch has higher making and breaking capacity, and through the structure of modularization, once meet the failure, can directly replace the corresponding damaged part, need not disassemble and replace the whole protection switch, reduce the difficulty of maintenance, save cost.

[0005] TECHNICAL SCHEME

[0006] In order to realize the above technical purpose, the utility model provides a kind of modularization protection switch, it is characterized by: it includes breaking module and current-carrying module, the breaking module and current-carrying module are assembled together to form modularization protection switch, the breaking module and current-carrying module are in turn time sequence and break circuit, in the process that the breaking module and current-carrying module are in turn time sequence and break circuit, arc produces in breaking module to guarantee that modularization protection switch has higher making and breaking capacity, simultaneously, breaking module and current-carrying module can bear greater short circuit current when closing, so that modularization protection switch also has higher short time withstand capacity.

[0007] In one of the embodiments, the modular protection switch comprises a current-carrying module and a plurality of breaking modules opposite to the current-carrying module, the plurality of breaking modules are located on one side or both sides of the current-carrying module, the plurality of breaking modules are connected in series by a conductive component, and the plurality of breaking modules connected in series by the conductive component are connected in parallel with the current-carrying module.

[0008] In one of the embodiments, the breaking module comprises a breaking housing, a breaking shaft mounting hole is arranged on the breaking housing for mounting a breaking shaft, the breaking shaft is rotatable mounted in the breaking shaft mounting hole, a breaking moving contact group is rotatable mounted in a breaking moving contact group mounting cavity hole on the breaking shaft, contact portions of the breaking moving contact group at both ends of the breaking moving contact group extend out of the breaking moving contact group mounting cavity hole, a breaking stationary contact group is fixedly mounted on the breaking housing corresponding to the contact portions of the breaking moving contact group at both ends, and the contact portions of the breaking moving contact group at both ends can be in contact with and separated from the breaking stationary contact group during rotation of the breaking moving contact group.

[0009] In one of the embodiments, the breaking moving contact group comprises at least one moving conductive rod, a breaking moving contact is fixed on the at least one moving conductive rod, and a breaking stationary contact is fixed on a breaking stationary contact of the breaking stationary contact group.

[0010] In one of the embodiments, an arc-extinguishing chamber is arranged between a maximum opening position of the breaking moving contact group and a contact position of the breaking moving contact group with the breaking stationary contact group, an arc-extinguishing grid group of the arc-extinguishing chamber corresponds to the breaking stationary contact of the breaking stationary contact group at one end of the arc-extinguishing grid group, and extends to a rear of the maximum opening position of the breaking moving contact group at the other end, and both ends of the arc-extinguishing grid group are inserted into a pair of side plates.

[0011] In one of the embodiments, a magnetic enhancement block one is wrapped outside the arc-extinguishing chamber, and a magnetic enhancement block two is arranged behind the maximum opening position of the breaking moving contact group and extends to the maximum opening position of the breaking moving contact group so as to wrap the contact portions of the breaking moving contact group at the maximum opening position.

[0012] In one of the embodiments, the current-carrying module comprises a current-carrying housing, a current-carrying shaft mounting hole is arranged on the current-carrying housing for mounting a current-carrying shaft, the current-carrying shaft is rotatable mounted in the current-carrying shaft mounting hole, a current-carrying moving contact group is rotatable mounted in a current-carrying moving contact group mounting cavity hole on the current-carrying shaft, both ends of the current-carrying moving contact group extend out of the current-carrying moving contact group mounting cavity hole, a bent portion of a wiring strip extends into the current-carrying housing corresponding to contact portions of the current-carrying moving contact group, wiring ends of the wiring strip extend to outside of the current-carrying housing, and the current-carrying moving contact group can be plugged or separated from the bent portion of the wiring strip during rotation of the current-carrying moving contact group.

[0013] The current-carrying contact group comprises at least two movable conductive rods.

[0014] In one of the embodiments, the several breaking modules are connected in series through the conductive component one between the corresponding breaking static contact groups, and the breaking static contact groups of the several breaking modules not connected in series through the conductive component one are connected with the conductive part of the busbar through the conductive component two, so that the several breaking modules are connected in parallel with the current-carrying module.

[0015] The conductive component one and the conductive component two are conductive plates or flexible connections.

[0016] In one of the embodiments, during the assembly of the several breaking modules on one side or both sides of the current-carrying module, the side wall of the current-carrying shell opposite to the breaking module is replaced by a side wall of a middle cover shell capable of being assembled, and the side wall of the middle cover shell is provided with a via hole for the conductive component one to pass through.

[0017] In one of the embodiments, when the number of the breaking modules is even and connected in series, the side walls of the breaking shells of the adjacent two breaking modules are replaced by the middle cover shells capable of being assembled, except for the side walls of the outermost two breaking shells.

[0018] Advantages

[0019] The modularized protective switch provided by the utility model, which comprises a breaking module and a current-carrying module, the breaking module and the current-carrying module are assembled together to form a modularized protective switch, the breaking module and the current-carrying module are sequentially connected and disconnected in time sequence, during the process of sequentially connecting and disconnecting in time sequence, arc is generated in the breaking module, so that the modularized protective switch has higher connecting and disconnecting capacity, meanwhile, the breaking module and the current-carrying module can bear greater short-circuit current when closing, so that the modularized protective switch also has higher short-time resistance capacity, and through the modularized structure, once a fault occurs, the corresponding damaged part can be directly replaced, the whole protective switch does not need to be disassembled and replaced, the maintenance difficulty is reduced, and cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as the limitation to the scope, and for the ordinary skilled in the art, other related drawings can also be obtained according to these drawings without the creative labor.

[0021] ATTACHMENT Figure 1 It is the product drawing of the current-carrying shell in the embodiments of the utility model.

[0022] Figure 2 is a product diagram of the load current contact group in the embodiment of the present application; Figure 2 Figure 3 is a wiring panel installation schematic diagram of the load current contact group in the embodiment of the present application;

[0023] Figure 4 is a product diagram of the disconnecting shell in the embodiment of the present application; Figure 3 Figure 5 is a disconnecting moving contact group and disconnecting stationary contact group installation schematic diagram in the embodiment of the present application;

[0024] Figure 4 Figure 6 is a product diagram of the arc extinguishing chamber in the embodiment of the present application;

[0025] Figure 7 is a product diagram of the modularized protective switch in the embodiment of the present application; Figure 5 Figure 8 is a structure schematic diagram of the modularized protective switch in the embodiment of the present application;

[0026] Figure 6 Figure 9 is a product diagram of the load current module and the disconnecting module in the embodiment of the present application;

[0027] Figure 10 is a product diagram of the load current module and the disconnecting module in the embodiment of the present application; Figure 7 Figure 11 is a product diagram of the load current module and the disconnecting module in the embodiment of the present application;

[0028] Figure 8 Figure 12 is a relative position schematic diagram of the load current module and the disconnecting module in the embodiment of the present application; Figure 1

[0029] Figure 13 is a relative position schematic diagram of the load current module and the disconnecting module in the embodiment of the present application; Figure 9 Figure 2 Figure 14 is a relative position schematic diagram of the load current module and the disconnecting module in the embodiment of the present application;

[0030] Figure 15 is a relative position schematic diagram of the load current module and the disconnecting module in the embodiment of the present application; Figure 10 Figure 3

[0031] Figure 11 Figure 16 is a relative position schematic diagram of the load current module and the disconnecting module in the embodiment of the present application; Figure 1

[0032] Figure 17 is a relative position schematic diagram of the load current module and the disconnecting module in the embodiment of the present application; Figure 12 Figure 2 DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely explained below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0034] ​​​​​​​​​​​It is to be noted that when a component is referred to as being "on" or "disposed on" another component, it can be directly on the other component or intervening components can also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar terms as used in the description of the specification are for the purpose of illustration only and do not indicate or imply absolute positions of elements.

[0035] In addition, the terms "first", "second", etc. are used herein only to describe various elements, and do not imply or connote relative importance or a quantity of the specified elements. Thus, features with a "first", "second", etc. designation can include at least one of such features unless otherwise specified or limited. The term "plurality" means at least two, for example, two, three, etc., unless otherwise specified or limited.

[0036] In this application, unless otherwise specifically noted or limited, the terms "on", "under", "above", and "on top of" as used in the specification can mean that the first element is directly in contact with the second element, or indirectly in contact with the second element through an intermediate medium. Also, the terms "on", "above", and "on top of" as used in the specification can mean that the first element is directly above or diagonally above the second element, or simply means that the first element is horizontally higher than the second element. The terms "under", "below", and "underneath" as used in the specification can mean that the first element is directly below or diagonally below the second element, or simply means that the first element is horizontally lower than the second element.

[0037] Unless otherwise defined, all technical and scientific terms used in the specification are intended to have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the specification of the present application is for the purpose of describing only specific embodiments and is not intended to be limiting of the application. The term "and / or" as used in the specification of the present application encompasses all of the possible combinations of one or more of the associated listed items.

[0038] Embodiments

[0039] In the prior art, the protective switch is mostly a knife switch type plug-in contact, which has high dynamic and thermal stability and can meet the higher short-time withstand index. However, since the traditional knife switch type plug-in contact is a non-contact structure, the contact cannot resist arc burning when breaking the circuit, so it is difficult to meet the requirements of higher making and breaking capacity. If a contact structure is provided on the existing traditional knife switch type plug-in contact, it is also difficult to meet the requirements of higher short-time withstand index. Moreover, the existing protective switch is a whole, and when it needs to be repaired and replaced, the related components of the whole protective switch need to be disassembled and replaced, which increases the difficulty of maintenance.

[0040] To solve this problem, as shown in the accompanying Figure 7 The embodiment provides a modular protection switch, which comprises a breaking module a and a current-carrying module b, the breaking module a and the current-carrying module b are assembled together to form the modular protection switch, the breaking module a and the current-carrying module b are sequentially connected and disconnected in time, and during the process of sequentially connecting and disconnecting the circuit, arc is generated in the breaking module a, so that the modular protection switch has high on-off and breaking capacity, and meanwhile, the breaking module a and the current-carrying module b can withstand greater short-circuit current when closing, so that the modular protection switch also has high short-time withstand capability.

[0041] Specifically, as shown in the accompanying Figure 11 and 12 The modular protection switch comprises the current-carrying module b and a plurality of breaking modules a opposite to each other, the plurality of breaking modules a are located on one side or both sides of the current-carrying module b, the plurality of breaking modules a are connected in series through the conductive component a09, and the plurality of breaking modules a connected in series through the conductive component a09 are connected in parallel with the current-carrying module b. Specifically, as shown in the accompanying Figure 8 ,9,10, the plurality of breaking modules a are connected in series through the conductive component a09 between the corresponding breaking static contact groups a04, the breaking static contact groups a04 not connected in series through the conductive component a09 in the plurality of breaking modules a are connected with the conductive part b0402 of the wiring panel b04 through the conductive component a10, so that the plurality of breaking modules a are connected in parallel with the current-carrying module b; wherein the conductive component a09 and the conductive component a10 are conductive plates or soft connections.

[0042] As shown in the accompanying Figure 3 and 4As shown, the breaking module a includes a breaking housing a01, a breaking shaft installation hole a0101 is arranged on the breaking housing a01 for installing a breaking shaft a02, the breaking shaft a02 is installed in the breaking shaft installation hole a0101 and can rotate, a breaking moving contact group a03 is installed in a breaking moving contact group installation cavity hole a0101 on the breaking shaft a02 and can rotate with the breaking shaft a02, a contact part one a at both ends of the breaking moving contact group a03 extends out of the breaking moving contact group installation cavity hole a0101, a breaking stationary contact group a04 is fixedly installed on the breaking housing a01 and corresponds to the contact part one a0301 at both ends of the breaking moving contact group a03, in the rotating process of the breaking moving contact group a03, the contact part one a0301 at both ends of the breaking moving contact group a03 can contact and separate from the breaking stationary contact group a04. In the embodiment, the breaking moving contact group a03 includes at least one moving conductive rod a03a, the at least one moving conductive rod a03a is fixed with a breaking moving contact a0302, and the breaking stationary contact a04a of the breaking stationary contact group a04 is fixed with a breaking stationary contact a0401.

[0043] In order to extinguish the arc, as shown in the attached Figure 5 As shown, an arc extinguishing chamber a05 is arranged between the maximum opening position of the breaking moving contact group a03 and the contact position of the breaking moving contact group a03 and the breaking stationary contact group a04, one end of an arc extinguishing grid group a0501 of the arc extinguishing chamber a05 corresponds to the breaking stationary contact a04a of the breaking stationary contact group a04 fixed with the breaking stationary contact a0401, and the other end extends to the rear of the maximum opening position of the breaking moving contact group a03, and the arc extinguishing grid group a0501 is inserted on a pair of side plates a06 at both ends. In order to increase the magnetic blowing force, a magnetic enhancement block one a07 is wrapped outside the arc extinguishing chamber a05, and a magnetic enhancement block two a08 is arranged behind the maximum opening position of the breaking moving contact group a03 and extends to the maximum opening position of the breaking moving contact group a03 so as to wrap the contact part one a0301 of the breaking moving contact group a03 at the maximum opening position.

[0044] As shown in the attached Figure 1 and 2As shown, the current-carrying module b includes a current-carrying shell b01, a current-carrying rotating shaft b02 is arranged on the current-carrying shell b01 and can rotate in a current-carrying rotating shaft mounting hole b0101, a current-carrying moving contact group b03 is arranged in a current-carrying moving contact group mounting cavity hole b0201 on the current-carrying rotating shaft b02 and can rotate with the current-carrying rotating shaft b02, both ends of the current-carrying moving contact group b03 extend out of the current-carrying moving contact group mounting cavity hole b0201, a bent part b0401 of a wiring strip b04 extends into the current-carrying shell b01 and corresponds to a contact part b0301 of the current-carrying moving contact group b03, wiring ends b0402 of the wiring strip b04 extend to the outside of the current-carrying shell b01, and the current-carrying moving contact group b03 can be plugged with or separated from the bent part b0401 of the wiring strip b04 during rotation. The current-carrying moving contact group b03 includes at least two moving conductive rods b03a.

[0045] In practice, as shown in the accompanying drawings, the current-carrying module b includes a current-carrying shell b01, a current-carrying rotating shaft b02 is arranged on the current-carrying shell b01 and can rotate in a current-carrying rotating shaft mounting hole b0101, a current-carrying moving contact group b03 is arranged in a current-carrying moving contact group mounting cavity hole b0201 on the current-carrying rotating shaft b02 and can rotate with the current-carrying rotating shaft b02, both ends of the current-carrying moving contact group b03 extend out of the current-carrying moving contact group mounting cavity hole b0201, a bent part b0401 of a wiring strip b04 extends into the current-carrying shell b01 and corresponds to a contact part b0301 of the current-carrying moving contact group b03, wiring ends b0402 of the wiring strip b04 extend to the outside of the current-carrying shell b01, and the current-carrying moving contact group b03 can be plugged with or separated from the bent part b0401 of the wiring strip b04 during rotation. The current-carrying moving contact group b03 includes at least two moving conductive rods b03a. Figure 6 As shown, during assembly of the plurality of breaking modules a on one side or both sides of the current-carrying module b, a side wall of the current-carrying shell b01 opposite to the breaking module a is replaced by a side wall of a middle cover c shell c01 capable of being assembled, and a through hole c02 for passing through the conductive part a09 is arranged on the side wall of the middle cover c shell c01.

[0046] In addition, when the number of breaking modules a is even and connected in series, the side wall of the breaking shell a02 of the remaining adjacent two breaking modules a is replaced by a middle cover c shell c02 capable of being assembled, except for the side wall of the outermost two breaking shells a01.

[0047] It should be noted that the contact form of the breaking moving contact group a03 and the breaking stationary contact group a04 of the breaking module a can be plug-in type or snap type.

[0048] When the contact form of the breaking moving contact group a03 and the breaking stationary contact group a04 of the breaking module a is plug-in type, the moving conductive rod a03a of the breaking moving contact group a03 can be welded with a silver contact or can be a copper conductive rod without a silver contact. If the moving conductive rod a03a of the breaking moving contact group a03 is not welded with a silver contact, the copper contact of the breaking stationary contact group a04 is also not welded with a silver contact.

[0049] The embodiment provides a modular protection switch including a current-carrying module and a breaking module, reliable short-circuit resistance is ensured by using the current-carrying module, and an arc is generated between contact groups of the breaking module, so that the protection switch has high on and off capacity, and through the modular structure, once a fault occurs, the corresponding damaged part can be directly replaced, the entire protection switch does not need to be disassembled and replaced, maintenance difficulty is reduced, and cost is saved.

[0050] Each technical feature of the above-described embodiments can be combined with any other technical feature, and for the sake of brevity, not all possible combinations are described, but it is understood that the scope of the present disclosure encompasses all such possible combinations.

[0051] The above-described embodiments are merely illustrative of several embodiments of the present application, and the description is relatively specific and detailed, but should not be understood as limiting the scope of the patent of the present application. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A modular protective switch, characterized by: It comprises a breaking module (a) and a current-carrying module (b), which are assembled together to form a modular protective switch, and the breaking module (a) and the current-carrying module (b) are sequentially connected and disconnected in time to turn on and off the circuit, and during the process of sequentially connecting and disconnecting the circuit, arc is generated in the breaking module (a), so as to ensure that the modular protective switch has high on-off capacity, and at the same time, the breaking module (a) and the current-carrying module (b) can withstand greater short-circuit current when closing, so that the modular protective switch also has high short-time withstand capacity.

2. A modular protective switch according to claim 1, characterized in that: The modular protective switch comprises a current-carrying module (b) and a plurality of breaking modules (a) opposite to the current-carrying module (b), the plurality of breaking modules (a) are located on one side or both sides of the current-carrying module (b), the plurality of breaking modules (a) are electrically connected in series through a conductive component (a09), and the plurality of breaking modules (a) connected in series through the conductive component (a09) are electrically connected in parallel with the current-carrying module (b).

3. A modular protective switch according to claim 1, wherein: The breaking module (a) comprises a breaking shell (a01), a breaking shaft mounting hole (a0101) for mounting a breaking shaft (a02) is arranged on the breaking shell (a01), the breaking shaft (a02) is rotatably mounted in the breaking shaft mounting hole (a0101), a breaking moving contact group (a03) is rotatably mounted in a breaking moving contact group mounting cavity hole (a0201) on the breaking shaft (a02), contact portions (a0301) at both ends of the breaking moving contact group (a03) extend out of the breaking moving contact group mounting cavity hole (a0201), and a breaking stationary contact group (a04) is fixedly mounted on the breaking shell (a01) and corresponds to the contact portions (a0301) at both ends of the breaking moving contact group (a03).

4. A modular protective switch according to claim 3, wherein: The breaking moving contact group (a03) comprises at least one moving conductive rod (a03a), and a breaking moving contact (a0302) is fixed on the at least one moving conductive rod (a03a).

5. A modular protective switch according to claim 3, wherein: An arc-extinguishing chamber (a05) is arranged between the maximum opening position of the breaking moving contact group (a03) and the contact position of the breaking moving contact group (a03) and the breaking stationary contact group (a04), one end of an arc-extinguishing grid group (a0501) of the arc-extinguishing chamber (a05) corresponds to the breaking stationary contact (a04a) of the breaking stationary contact group (a04) on which the breaking stationary contact (a0401) is fixed, and the other end extends to the rear of the maximum opening position of the breaking moving contact group (a03), and the arc-extinguishing grid group (a0501) is inserted on a pair of side plates (a06) at both ends.

6. A modular protective switch according to claim 5, wherein: The magnetic block one (a07) is wrapped outside the arc extinguishing chamber (a05), and the magnetic block two (a08) is arranged behind the maximum opening position of the breaking moving contact group (a03) and extends to the maximum opening position of the breaking moving contact group (a03), so that the contact part one (a0301) of the breaking moving contact group (a03) at the maximum opening position can be wrapped.

7. A modular protective switch according to claim 1, wherein: The current-carrying module (b) comprises a current-carrying shell (b01), wherein a current-carrying rotating shaft mounting hole (b0101) for mounting a current-carrying rotating shaft (b02) is arranged on the current-carrying shell (b01), the current-carrying rotating shaft (b02) is rotatable in the current-carrying rotating shaft mounting hole (b0101), a current-carrying moving contact group (b03) is rotatable together with the current-carrying rotating shaft (b02) in a current-carrying moving contact group mounting cavity hole (b0201) on the current-carrying rotating shaft (b02), both ends of the current-carrying moving contact group (b03) extend out of the current-carrying moving contact group mounting cavity hole (b0201), a bending part (b0401) of a busbar (b04) extends into the current-carrying shell (b01) and corresponds to a contact part two (b0301) of the current-carrying moving contact group (b03), a wiring end (b0402) of the busbar (b04) extends to the outside of the current-carrying shell (b01), the current-carrying moving contact group (b03) can be plugged with or separated from the bending part (b0401) of the busbar (b04) during rotation, and the current-carrying moving contact group (b03) comprises at least two moving guide rods two (b03a).

8. A modular protective switch according to claim 2, wherein: The breaking static contact groups (a04) of the plurality of breaking modules (a) are connected in series through the conductive part one (a09), and the breaking static contact groups (a04) of the plurality of breaking modules (a) that are not connected in series through the conductive part one (a09) are connected to the conductive part (b0403) of the busbar (b04) through the conductive part two (a10), so that the plurality of breaking modules (a) and the current-carrying module (b) are connected in parallel. The conductive part one (a09) and / or the conductive part two (a10) are conductive plates or soft connections.

9. A modular protective switch as claimed in claim 2, characterized in that: During assembly of the plurality of breaking modules (a) on one side or both sides of the current-carrying module (b), a side wall of the current-carrying shell (b01) opposite to the breaking module (a) is replaced by a side wall of a middle cover (c) shell (c01) that can be used for assembly, and a through hole (c02) for the conductive part one (a09) to pass through is arranged on the side wall of the middle cover (c) shell (c01).

10. A modular protective switch as claimed in claim 1, characterized in that: When the number of the breaking modules (a) connected in series is even, the side walls of the breaking shells (a01) of the adjacent two breaking modules (a) except the side walls of the outermost two breaking shells (a01) are replaced by the middle cover (c) shell (c01) that can be used for assembly.

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