Circuit breaker and power equipment

Abstract

The utility model provides a circuit breaker and power equipment. The circuit breaker includes a housing. The shell comprises a front cover and a rear cover assembly which are sequentially arranged in the depth direction of the circuit breaker. And at least one part of the operating handle close to the operating mechanism, the operating mechanism and the moving contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker. The rear cover assembly comprises a first shell and a second shell which are sequentially arranged and connected in the height direction of the circuit breaker. The operating mechanism is at least close to a part of the moving contact assembly, and the moving contact assembly and the static contact are located between the first shell and the second shell. According to the utility model, the short-circuit-breaking shell can be assembled along two different directions, so that the single-direction accumulation of the shell is improved, and the flexible assembly of each component in the circuit breaker is further facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of power equipment, and in particular to a circuit breaker and power equipment. Background Art

[0002] As artificial intelligence (AI), 5.5G, and autonomous driving technologies are gradually applied to people's daily lives and work, the demand for computing power from these technologies has also increased significantly. As a key area of ​​computing power support, data centers require ultra-high capacity and high density. As an indispensable core unit in modern data centers, uninterruptible power supplies (UPS) have been further miniaturized under the guidance of capacity upgrades and high-density trends.

[0003] In the power supply and distribution system of the data center, circuit breakers are usually required to realize the distribution of electric energy. As a key component in the power supply and distribution system, the circuit breaker not only plays the role of controlling the on and off of the circuit, but also has certain protection functions. Specifically, a mechanical switch can be set in the circuit breaker, and the staff can operate the mechanical switch to switch the closed or open state of the circuit breaker, thereby realizing the conduction or disconnection of the circuit. In addition, when the circuit has an overload, short circuit or other faults, the circuit breaker can also switch to the open state automatically to disconnect the current in the circuit, thereby realizing its protection function.

[0004] The housing of an existing circuit breaker usually includes a multi-layer shell. When assembling the circuit breaker, the multi-layer shell needs to be assembled in sequence in one direction and needs to be fixed with a large number of fasteners. However, inside the circuit breaker, due to the complex positional relationship between the various components, the stacking installation of the multi-layer shell in a single direction makes it difficult to assemble the components. Utility Model Content

[0005] The present application provides a circuit breaker and an electric power device, so that a housing structure of the circuit breaker can be assembled along different directions, thereby simplifying the assembly operation of the circuit breaker.

[0006] In a first aspect, the present application provides an electric power device. The electric power device includes a cabinet and a plurality of circuit breakers and a plurality of power modules located in the cabinet, wherein the plurality of circuit breakers are sequentially arranged in the cabinet along the width direction of the cabinet, the height direction of the circuit breaker is in the same direction as the width direction of the cabinet, the width direction of the circuit breaker is in the same direction as the height direction of the cabinet, and the depth direction of the circuit breaker is in the same direction as the depth direction of the cabinet. Specifically, the circuit breaker includes a housing, an operating handle, an operating mechanism and a flow assembly. The operating handle is connected to the operating mechanism. The flow assembly includes a moving contact assembly and a static contact, the moving contact assembly includes a moving contact that can rotate relative to the housing, and the static contact is located on a side of the moving contact assembly away from the operating mechanism along the depth direction of the circuit breaker. The operating handle is used to control the operating mechanism to drive the moving contact to move so that the moving contact contacts or separates from the static contact. In addition, the housing includes a front cover and a rear cover assembly sequentially arranged along the depth direction of the circuit breaker. The operating handle, at least the portion close to the operating mechanism, the operating mechanism and the moving contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is arranged close to the front cover. The front cover is provided with an opening, and the end of the operating handle away from the operating mechanism passes through the opening and extends out of the housing. The rear cover assembly includes a first shell and a second shell that are sequentially arranged and connected along the height direction of the circuit breaker, and the operating mechanism, at least the portion close to the moving contact assembly, the moving contact assembly and the static contact are located between the first shell and the second shell.

[0007] The above-mentioned circuit breaker has a circuit breaker operating surface for the staff to perform closing and opening operations, check the working status of the circuit breaker and other operations. In the plane where the circuit breaker operating surface is located, the dimension of the circuit breaker along the direction in which the operating handle is pushed is the height, and the dimension of the circuit breaker perpendicular to the height direction is the width. The dimension of the circuit breaker along the direction perpendicular to the circuit breaker operating surface is the depth. The circuit breaker of the present application can be applied to a power supply and distribution system, and the circuit breaker can be specifically installed in a cabinet. Similarly, the cabinet has a user operating surface for the staff to perform control operations, installation and removal, or maintenance operations. The circuit breaker operating surface of the circuit breaker faces the same direction as the user operating surface. Taking the state where the cabinet is placed on the ground as an example, in the plane where the user operating surface is located, the dimension of the cabinet parallel to the ground is the width, and the dimension of the cabinet perpendicular to the ground is the height. The dimension of the cabinet perpendicular to the user operating surface is the depth. When multiple of the above-mentioned circuit breakers are installed in the cabinet, these circuit breakers are placed in parallel along the width direction of the cabinet, wherein the circuit breaker operation surface of the circuit breaker and the user operation surface of the cabinet face the same direction, and the height direction of each circuit breaker is in the same direction as the width direction of the cabinet, the width direction of each circuit breaker is in the same direction as the height direction of the cabinet, and the depth direction of each circuit breaker is in the same direction as the depth direction of the cabinet, that is, each circuit breaker is placed horizontally in the cabinet.

[0008] In the electric power equipment of the present application, the part of the operating handle of the circuit breaker close to the operating mechanism, the operating mechanism and the moving contact assembly are arranged along the depth direction of the circuit breaker. It can be understood that the part of the operating handle, the operating mechanism and the moving contact assembly are arranged in a layered form along the depth direction of the circuit breaker, so that the layout of the components of the circuit breaker along the height direction can be reduced, thereby reducing the height size of the circuit breaker, and then reducing the occupied space of the circuit breaker to increase the number of layouts of the circuit breaker in the cabinet. Among them, the circuit breaker includes a first layer (electric or manual operation layer), a second layer (operation layer) and a third layer (current flow layer). When the circuit breaker is specifically set, the operating handle is located on the first layer, the operating mechanism is located on the second layer, and the current flow assembly is located on the third layer. In addition, the front cover and the rear cover assembly of the shell can be assembled along the depth direction of the circuit breaker, and the first shell and the second shell of the rear cover assembly can be assembled along the height direction of the circuit breaker, so that the short-circuit shell can be assembled along two different directions to improve the single-direction stacking of the shell, which is conducive to the flexible assembly of the components inside the circuit breaker.

[0009] In a possible implementation, the back cover assembly may also include a first insulating shell and a second insulating shell. The first insulating shell is connected to a side of the first shell away from the second shell, and the second insulating shell is connected to a side of the second shell away from the first shell. That is, the first insulating shell, the first shell, the second shell and the second insulating shell are arranged in sequence along the height direction of the circuit breaker. The circuit breaker also includes an arc extinguishing chamber, which is located on the side of the current-passing assembly away from the operating mechanism along the depth direction of the circuit breaker. The arc extinguishing chamber is used to eliminate the arc generated when the moving contact is separated from the static contact. The current-passing assembly also includes a wire, a first copper bar and a second copper bar. The first copper bar and the second copper bar are arranged opposite to each other along the height direction of the circuit breaker, and the first copper bar and the second copper bar extend to both sides of the arc extinguishing chamber along the depth direction of the circuit breaker. One end of the first copper bar close to the operating mechanism is electrically connected to the moving contact through a wire. The static contact is arranged on the second copper bar and the static contact is electrically connected to the second copper bar. Along the depth direction of the circuit breaker, the first copper bar and the second copper bar are located on both sides of the arc extinguishing chamber. Specifically, the first copper bar can be located between the first insulating shell and the first shell, or the first copper bar can also be located between the second shell and the second insulating shell. The second copper bar is located between the first shell and the second shell. In this technical solution, the current-passing assembly can be assembled along the height direction of the circuit breaker. The spacing between the first copper bar and the second copper bar is large, so that the electrical gap is large. In addition, the first copper bar and the second copper bar are arranged close to the insulating shell of the circuit breaker, and the heat dissipation is better.

[0010] The above-mentioned circuit breaker may also include a backup protector. The backup protector includes a static iron core and a moving iron core. The operating mechanism includes a lock assembly and an operating assembly, the operating assembly is connected to the operating handle and the operating assembly is connected to the moving contact, and the lock assembly is used to lock or unlock the movement of the operating assembly. The backup protector of the present application is used for when a fault current is detected, the static iron core generates a magnetic force on the moving iron core, so that the moving iron core moves along the depth direction of the circuit breaker, so as to control the lock assembly to drive the operating assembly to move, so that the moving contact is separated from the static contact. When the backup protector is specifically set, the backup protector can be set close to the second copper bar. In one possible implementation, the static contact is installed in the second shell. The static iron core is installed on the static contact, and the moving iron core is installed between the second shell and the second insulating shell. In another possible implementation, the static contact is installed in the first shell. The static iron core is installed on the second copper bar, and the moving iron core is installed between the first shell and the first insulating shell. In this technical solution, the backup protector can be limited by two layers of shells, and the moving iron core moves between the two layers of shells along the depth direction of the circuit breaker without the need to set up other additional supporting structures or guide structures, thereby reducing the size of the backup protector along the height direction of the circuit breaker.

[0011] In another possible implementation, the back cover assembly may also include a first insulating shell and a second insulating shell. The first insulating shell is connected to a side of the second shell away from the first shell, and the second insulating shell is connected to a side of the first insulating shell away from the second shell. That is to say, the first shell, the second shell, the first insulating shell and the second insulating shell are arranged in sequence along the height direction of the circuit breaker. The circuit breaker also includes an arc extinguishing chamber, which is located on the side of the current-passing assembly away from the operating mechanism along the depth direction of the circuit breaker. The arc extinguishing chamber is used to eliminate the arc generated when the moving contact is separated from the static contact. The current-passing assembly also includes a wire, a first copper bar and a second copper bar. The first copper bar and the second copper bar are arranged opposite to each other along the height direction of the circuit breaker and are located on the same side of the arc extinguishing chamber, and the first copper bar and the second copper bar extend along the depth direction of the circuit breaker. One end of the first copper bar close to the operating mechanism is electrically connected to the moving contact through a wire, and the static contact is arranged on the second copper bar and electrically connected to the second copper bar. The first copper bar is located between the second shell and the first insulating shell, and the second copper bar is located between the first shell and the second shell.

[0012] The above-mentioned circuit breaker may also include a backup protector. The backup protector includes a static iron core and a moving iron core. The operating mechanism includes a locking assembly and an operating assembly, the operating assembly is connected to the operating handle and the operating assembly is connected to the moving contact, and the locking assembly is used to lock or unlock the movement of the operating assembly. The backup protector of the present application is used for when a fault current is detected, the static iron core generates a magnetic force on the moving iron core, so that the moving iron core moves along the depth direction of the circuit breaker, so as to control the locking assembly to drive the operating assembly to move, so that the moving contact is separated from the static contact. When the backup protector is specifically set, the static iron core is installed on the first copper bar, and the moving iron core is installed between the first insulating shell and the second insulating shell. In this technical solution, the backup protector can be limited by two layers of shells, and the moving iron core moves between the two layers of shells along the depth direction of the circuit breaker without the need to additionally set up other supporting structures or guide structures, thereby reducing the size of the backup protector along the height direction of the circuit breaker.

[0013] In a possible implementation, the rear cover assembly may further include a middle shell. The middle shell is located between the front cover and the first shell in the depth direction of the circuit breaker. In the depth direction of the circuit breaker, one side of the middle shell is connected to the front cover, and the other side is connected to the first shell and the second shell. At least a portion of the operating handle close to the operating mechanism, and at least a portion of the operating mechanism close to the operating handle are located in the middle shell. Therefore, the middle shell can be used to support the operating mechanism, thereby reducing the strength requirements of the first shell and the second shell. In addition, the middle shell and the rear cover assembly can structurally realize the electrical spacing between the operating mechanism and the moving contact assembly.

[0014] In a possible implementation, a first semicircular accommodating cavity is provided at one end of the first housing close to the front cover, and a second semicircular accommodating cavity is provided at one end of the second housing close to the front cover. The first semicircular accommodating cavity and the second semicircular accommodating cavity are arranged opposite to each other along the height direction of the circuit breaker, and together form a circular accommodating cavity. The moving contact assembly includes a rotating housing, the rotating housing has a semicircular surface arranged toward the stationary contact, and the inner surface of the circular accommodating cavity matches the shape of the semicircular surface. The rotating housing is limited in the circular accommodating cavity and can rotate in the circular accommodating cavity. In this way, the rotating housing can rotate in the circular accommodating cavity.

[0015] In a possible implementation, a first accommodating cavity is provided at one end of the first shell away from the front cover, and the first shell has a first protrusion extending toward the second shell. The first protrusion is located between the first accommodating cavity and the first semicircular accommodating cavity, and separates the first accommodating cavity and the first semicircular accommodating cavity. Correspondingly, a second accommodating cavity is provided at one end of the second shell away from the front cover, and the second shell has a second protrusion extending toward the first shell. The second protrusion is located between the second accommodating cavity and the second semicircular accommodating cavity, and separates the second accommodating cavity and the second semicircular accommodating cavity. The first protrusion and the second protrusion are arranged opposite to each other along the height direction of the circuit breaker. The first accommodating cavity and the second accommodating cavity are arranged opposite to each other along the height direction of the circuit breaker, and together form an accommodating cavity for accommodating a static contact. In this way, during the rotation of the rotating shell, the accommodating cavity is always isolated from the above-mentioned circular accommodating cavity by the rotating shell, thereby realizing electrical isolation of the components in the two cavities.

[0016] In a possible implementation, a first joint is provided at one end of the first copper bar away from the operating mechanism. A second joint is provided at one end of the second copper bar away from the operating mechanism. The housing further comprises a terminal cover, which is connected to one end of the rear cover assembly away from the front cover, that is, the front cover, the rear cover assembly and the terminal cover are sequentially arranged along the depth direction of the circuit breaker. The first joint and the second joint are respectively located in the terminal cover. In this way, the front cover and the terminal cover can be installed from both sides of the rear cover assembly along the depth direction of the circuit breaker, making the overall installation method of the circuit breaker simpler and more flexible.

[0017] The circuit breaker further includes an arc extinguishing module. The arc extinguishing module is used to purify the gas ejected from the arc extinguishing chamber. The arc extinguishing module is located on the side of the arc extinguishing chamber away from the moving contact assembly along the depth direction of the circuit breaker, the part of the arc extinguishing module close to the arc extinguishing chamber is located in the rear cover assembly, and the part of the arc extinguishing module away from the arc extinguishing chamber is located in the terminal cover.

[0018] In a second aspect, the present application provides a circuit breaker. The circuit breaker includes a housing, an operating handle, an operating mechanism and a flow assembly. Specifically, the operating handle is connected to the operating mechanism. The flow assembly includes a moving contact assembly and a static contact, the moving contact assembly includes a moving contact that can rotate relative to the housing, and the static contact is located on the side of the moving contact assembly away from the operating mechanism along the depth direction of the circuit breaker. The operating handle is used to control the operating mechanism to drive the moving contact to move so that the moving contact contacts or separates from the static contact. In addition, the housing includes a front cover and a rear cover assembly arranged in sequence along the depth direction of the circuit breaker. At least a portion of the operating handle close to the operating mechanism, the operating mechanism and the moving contact assembly are arranged in sequence in the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is arranged close to the front cover. The front cover is provided with an opening, and one end of the operating handle away from the operating mechanism passes through the opening and extends out of the housing. The rear cover assembly includes a first shell and a second shell arranged and connected in sequence along the height direction of the circuit breaker, and at least a portion of the operating mechanism close to the moving contact assembly, the moving contact assembly and the static contact are located between the first shell and the second shell.

[0019] The above-mentioned circuit breaker has a circuit breaker operating surface, which is used for the staff to perform closing and opening operations, check the working status of the circuit breaker, etc. In the plane where the circuit breaker operating surface is located, the dimension of the circuit breaker along the pushing direction of the operating handle is the height, and the dimension of the circuit breaker perpendicular to the height direction is the width. The dimension of the circuit breaker along the direction perpendicular to the circuit breaker operating surface is the depth. The circuit breaker of the present application can be applied to the power supply and distribution system, and the circuit breaker can be specifically installed in the cabinet. In the power equipment of the present application, the part of the operating handle of the circuit breaker close to the operating mechanism, the operating mechanism and the moving contact assembly are arranged along the depth direction of the circuit breaker, which can be understood as the part of the operating handle, the operating mechanism and the moving contact assembly are arranged in the depth direction of the circuit breaker in a layered form, so that the layout of the components of the circuit breaker along the height direction can be reduced, thereby reducing the height size of the circuit breaker, and then reducing the occupied space of the circuit breaker, so as to increase the number of circuit breakers that can be laid out in the cabinet. Among them, the circuit breaker includes a first layer (electrical operation or manual operation layer), a second layer (operation layer) and a third layer (current flow layer). When the circuit breaker is specifically arranged, the operating handle is located on the first layer, the operating mechanism is located on the second layer, and the through-current assembly is located on the third layer. In addition, the front cover and rear cover assembly of the housing can be assembled along the depth direction of the circuit breaker, and the first shell and the second shell of the rear cover assembly can be assembled along the height direction of the circuit breaker, so that the housing of the short-circuit breaker can be assembled along two different directions to improve the single-direction stacking of the housing, which is conducive to the flexible assembly of the components inside the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of an application scenario of a circuit breaker provided in an embodiment of the present application;

[0021] Figure 2A schematic diagram of an electric power device provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0023] Figure 4 for Figure 3 Explosion diagram of the circuit breaker;

[0024] Figure 5 for Figure 3 A cross-sectional view of the circuit breaker along the AA direction;

[0025] Figure 6 A schematic diagram of a first shell and a second shell provided in an embodiment of the present application;

[0026] Figure 7 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0027] Figure 8 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0028] Fig. 9 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0029] Fig.10 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0030] Fig.11 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0031] Fig.12 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0032] Fig.13 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0033] Fig.14 for Fig.13 Explosion diagram of the circuit breaker;

[0034] Fig.15 for Fig.13 A cross-sectional view of the circuit breaker along the BB direction;

[0035] Fig.16 Another schematic diagram of the first shell and the second shell provided in an embodiment of the present application;

[0036] Fig.17 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0037] Fig.18 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0038] Fig.19 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0039] Fig. 20 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0040] Fig.21 Another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0041] Fig. 22 Another schematic diagram of a circuit breaker provided in an embodiment of the present application.

[0042] Reference numerals:

[0043] 10-Power supply and distribution system

[0044] 11-Power module

[0045] 20-Electrical equipment

[0046] 21-Cabinet

[0047] 210-User Operation Panel

[0048] 30-Circuit Breaker

[0049] 31- Shell

[0050] 32-Operation handle

[0051] 33-Operating mechanism

[0052] 34-Flow Components

[0053] 35-Interrupter

[0054] 36-Backup protector

[0055] 37-Arc extinguishing module

[0056] 38-Mutual inductor

[0057] 39-Controller

[0058] 310-Circuit breaker operation panel

[0059] 311-Front cover

[0060] 312-Rear cover assembly

[0061] 313-Terminal cover

[0062] 331-Lock assembly

[0063] 332-Operation Components

[0064] 341-Moving contact assembly

[0065] 342-static contact

[0066] 343-Wire

[0067] 344-First copper bar

[0068] 345-Second copper bar

[0069] 346-First connector

[0070] 347-Second connector

[0071] 3411-Moving contact

[0072] 3412-Rotating housing

[0073] 3121-First Shell

[0074] 3122-Second shell

[0075] 3123-First insulation shell

[0076] 3124-Second insulation shell

[0077] 3125-Middle Shell

[0078] 31211-First semicircular accommodation cavity

[0079] 31212-First accommodating chamber

[0080] 31213-First protrusion

[0081] 31214-Mounting cavity

[0082] 31221-Second semicircular accommodation cavity

[0083] 31222-Second accommodating chamber

[0084] 31223-Second protrusion DETAILED DESCRIPTION

[0085] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0086] In order to facilitate understanding of the circuit breaker and power equipment provided in the embodiment of the present application, the application scenarios are described below. The circuit breaker and power equipment provided in the embodiment of the present application can be widely used in various power supply and distribution systems. In an example provided in the present application, the circuit breaker can be used in the power supply and distribution system of the data center to connect, carry, and disconnect the current between the power supply network and the data center. Figure 1 Schematic diagram of application scenarios of the circuit breaker provided in the embodiment of the present application. Figure 1As shown, the power supply and distribution system 10 may include a power module 11 (such as Figure 1 As shown in the figure, there are a power module 11 composed of multiple UPS connected in series) and multiple circuit breakers. Take the power supply and distribution system 10 as an example, which is provided with three circuits, namely the first circuit C1, the second circuit C2, and the third circuit C3. A circuit breaker is provided in each circuit, wherein the first circuit C1 is connected to the power module 11, and a first circuit breaker K1 is provided at the input end of the power module 11, and a second circuit breaker K2 is provided at the output end; the second circuit C2 is connected to the bypass module, and a third circuit breaker K3 is provided at one end of the bypass module, and the other end is connected to the second circuit breaker K2; the third circuit C3 is a backup circuit, and a fourth circuit breaker K4 is provided.

[0087] When it is necessary to connect the circuit between the power supply network (or power supply) and the data center, the first circuit breaker K1 and the second circuit breaker K2 can be switched to the closed state; when it is necessary to disconnect the circuit between the power supply network and the data center, the first circuit breaker K1 or the second circuit breaker K2 can be switched to the open state. In this way, the power-on and power-off states of the data center are controlled by controlling the closed state and the open state of the circuit breaker. When the electrical equipment in the data center needs to be inspected and maintained, the first circuit breaker K1 can be switched to the open state, and the third circuit breaker K3 or the fourth circuit breaker K4 can be switched to the closed state, so as to facilitate the inspection and maintenance of the electrical equipment.

[0088] In addition, the circuit breaker of the present application can also be used in the power supply and distribution system 10 of enterprise power equipment or public power equipment to connect, carry, and disconnect the current between the power supply network and the enterprise power equipment or public power equipment. For example, when the power equipment (such as 4G base stations, 5G base stations, etc.) needs to work normally, the staff can switch the circuit breaker to the closed state so that the power supply network can provide the power equipment with the power required for normal operation. When the power equipment needs to be inspected and maintained, the staff can switch the circuit breaker to the open state to facilitate the inspection and maintenance of the power equipment.

[0089] The power supply and distribution system 10 may specifically include a plurality of power equipment. Figure 2 This is a schematic diagram of the power equipment provided in the embodiment of the present application. Figure 2As shown, each power device 20 includes a cabinet 21, and a plurality of power modules (Q1, ..., Qn) and a plurality of circuit breakers (K1, ..., Km) located in the cabinet 21. Among them, the side of the cabinet 21 facing the staff is a user operation surface 210. In the present application, taking the state where the cabinet 21 is placed on the ground as an example, the dimension of the user operation surface 210 parallel to the ground is the width, the dimension of the user operation surface 210 perpendicular to the ground is the height, and the dimension of the cabinet 21 perpendicular to the user operation surface 210 is the depth. The aforementioned multiple power modules are stacked in sequence along the height direction H of the cabinet 21, and the aforementioned multiple circuit breakers are placed in sequence on one side of the aforementioned multiple power modules along the width direction W of the cabinet 21. Among them, the power module is used to convert the voltage from the power grid to output an adapted voltage to the load device. Specifically, the power module may be an AC / AC module or an AC / DC module.

[0090] In existing power equipment, the outer shell of the circuit breaker is a multi-layer structure and is stacked and installed in one direction. However, this installation method is relatively simple and inconvenient for installing the internal components of the circuit breaker. In view of this, the present application provides a circuit breaker and power equipment, so that the outer shell structure of the circuit breaker can be assembled in different directions, thereby simplifying the assembly operation of the circuit breaker.

[0091] It should be noted that the terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context.

[0092] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0093] Figure 3 A schematic diagram of a circuit breaker provided in an embodiment of the present application, Figure 4 for Figure 3 Explosion diagram of the circuit breaker. Figure 3 and Figure 4As shown, the circuit breaker 30 includes a housing 31, an operating handle 32, an operating mechanism 33, and a flow assembly 34. Specifically, the operating handle 32 is connected to the operating mechanism 33. The flow assembly 34 includes a moving contact assembly 341 and a static contact 342. The moving contact assembly 341 includes a moving contact 3411 that can rotate relative to the housing 31, and the static contact 342 is located on the side of the moving contact assembly 341 away from the operating mechanism 33 along the depth direction of the circuit breaker 30. In one embodiment, one end of the operating handle 32 away from the operating mechanism 33 can extend out of the housing 31 so that the staff can push the operating handle 32 to perform closing and opening operations. In another embodiment, the housing 31 is provided with a knob to realize the opening and closing of the circuit breaker 30 by manual operation of the knob. Specifically, one end of the operating handle 32 away from the operating mechanism 33 is connected to the knob. When the staff performs manual operation of the knob, the knob is turned and the operating handle 32 is driven to push along the height direction h of the circuit breaker 30. In another embodiment, the circuit breaker 30 may further include a remote controller and an electric operating device, the electric operating device is connected to the operating handle 32, and the electric operating device is connected to the remote controller in communication, so as to realize the opening and closing of the circuit breaker 30 by electric operation. When the staff performs electric operation, a closing command or an opening command is sent to the remote controller, and the remote controller can control the electric operating device to push the operating handle 32. In this embodiment, the staff can approach the circuit breaker 30 to issue a command, or can also issue a command remotely through a communication device. In addition, at least the part of the operating handle 32 close to the operating mechanism 33, the operating mechanism 33 and the moving contact assembly 341 are sequentially arranged in the housing 31 along the depth direction d of the circuit breaker 30, and the static contact 342 is located on the side of the moving contact 3411 away from the operating mechanism 33 along the depth direction d of the circuit breaker 30. The operating handle 32 is used to control the operating mechanism 33 to drive the moving contact 3411 to move, so that the moving contact 3411 contacts or separates from the static contact 342. Further, the circuit breaker 30 may also include an arc extinguishing chamber 35, which is located on a side of the moving contact assembly 341 away from the operating mechanism 33 along the depth direction d of the circuit breaker 30. The arc extinguishing chamber 35 is used to eliminate the arc generated when the moving contact 3411 is separated from the static contact 342. In one embodiment, the static contact 342 is located on one side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30. The movement trajectory of the moving contact 3411 extends from the static contact 342 to the other side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30.

[0094] In the present application, the side of the operating handle 32 extending out of the housing 31 is the circuit breaker operating surface 310. Taking the circuit breaker operating surface 310 as an example, the dimension of the circuit breaker 30 along the pushing direction of the operating handle 32 is the height, the dimension perpendicular to the height direction h is the width, and the dimension perpendicular to the circuit breaker operating surface 310 is the depth. In other words, the operating handle 32, the operating mechanism 33, the current-passing assembly 34 and the arc extinguishing chamber 35 are sequentially arranged along the depth direction d of the circuit breaker 30. When the circuit breaker 30 is placed in the cabinet 21, the height direction h of the circuit breaker 30 is in the same direction as the width direction W of the cabinet 21, the width direction w of the circuit breaker 30 is in the same direction as the height direction H of the cabinet 21, and the depth direction d of the circuit breaker 30 is in the same direction as the depth direction D of the cabinet 21. Therefore, when the staff performs the closing operation or the opening operation on the circuit breaker 30, the staff pushes the operating handle 32 along the width direction W of the cabinet 21. When the operating handle 32 is pushed to perform an opening operation or a closing operation, the operating mechanism 33 can move with the operating handle 32 to drive the moving contact 3411 to separate from or contact the stationary contact 342. When the moving contact 3411 is in contact with the stationary contact 342, the circuit breaker 30 is in a closed state; when the moving contact 3411 is separated from the stationary contact 342, the circuit breaker 30 is in an opening state.

[0095] Figure 5 for Figure 3 The cross-sectional view of the circuit breaker along the AA direction. Figure 3 , Figure 4 and Figure 5 As shown, in the circuit breaker 30 of the present application, the housing 31 includes a front cover 311 and a rear cover assembly 312 which are sequentially arranged along the depth direction d of the circuit breaker 30. The operating handle 32, at least the part close to the operating mechanism 33, the operating mechanism 33, the moving contact assembly 341 and the arc extinguishing chamber 35 are sequentially arranged in the rear cover assembly 312 along the depth direction d of the circuit breaker 30, and the operating handle 32 is arranged close to the front cover 311. Therefore, the operating handle 32, the operating mechanism 33, the moving contact assembly 341 and the arc extinguishing chamber 35 are considered to be arranged in a layered form, so as to reduce the height size of the circuit breaker 30, reduce the occupied space of the circuit breaker 30, and increase the number of circuit breakers 30 that can be arranged in the cabinet 21. Specifically, the operating handle 32 is located on the first layer (electrical operation or manual operation layer), the operating mechanism 33 is located on the second layer (operation layer), a part of the current-passing assembly 34 is located on the third layer (current-passing layer), and the arc extinguishing chamber 35 is located on the fourth layer (arc extinguishing layer). The movable contact 3411 can extend along the depth direction d of the circuit breaker 30, so that the size of the movable contact 3411 in the height direction h of the circuit breaker 30 is reduced, which is conducive to minimizing the height direction h of the circuit breaker 30. In addition, while the movable contact 3411 is miniaturized, the driving force arm of the closing of the movable contact 3411 and the static contact 342 can be larger, thereby reducing the driving force of the operating mechanism 33, which is conducive to the operation stability of the operating mechanism 33.

[0096] The rear cover assembly 312 includes a first housing 3121 and a second housing 3122 which are sequentially arranged and connected along the height direction h of the circuit breaker 30. At least the part of the operating mechanism 33 close to the moving contact assembly 341, the moving contact assembly 341, the static contact 342 and the arc extinguishing chamber 35 are located between the first housing 3121 and the second housing 3122. Therefore, the front cover 311 and the rear cover assembly 312 of the housing 31 can be assembled along the depth direction d of the circuit breaker 30, and the first housing 3121 and the second housing 3122 of the rear cover assembly 312 can be assembled along the height direction h of the circuit breaker 30. The structure of the housing 31 is simple, and each part of the housing 31 can be fixed by bonding, welding, riveting, clamping or threaded connection, etc., so as to facilitate operation. When assembling the housing 31, it can be assembled in two different directions, so as to improve the problem of stacking in a single direction, and then facilitate the flexible assembly of various components inside the circuit breaker 30.

[0097] In the above embodiment, the first shell 3121 and the second shell 3122 are respectively provided with a receiving cavity to accommodate at least the portion of the operating mechanism 33 close to the moving contact assembly 341, the moving contact assembly 341, the stationary contact 342 and the arc extinguishing chamber 35, and support the aforementioned components. Figure 6 A schematic diagram of a first shell and a second shell provided in an embodiment of the present application. Figure 5 and Figure 6 As shown, a first semicircular accommodating chamber 31211 is provided at one end of the first housing 3121 close to the front cover 311, and a second semicircular accommodating chamber 31221 is provided at one end of the second housing 3122 close to the front cover 311. The first semicircular accommodating chamber 31211 and the second semicircular accommodating chamber 31221 are arranged opposite to each other along the height direction h of the circuit breaker 30, and together form a circular accommodating chamber. The moving contact assembly 341 includes a rotating housing 3412, and the rotating housing 3412 has a semicircular surface arranged toward the static contact 342, and the inner surface of the circular accommodating chamber matches the shape of the semicircular surface. The rotating housing 3412 is limited in the circular accommodating chamber and can rotate in the circular accommodating chamber. In this way, the rotating housing 3412 can rotate in the circular accommodating chamber.

[0098] In addition, a first housing cavity 31212 is provided at one end of the first housing 3121 away from the front cover 311, and the first housing 3121 has a first protrusion 31213 extending toward the second housing 3122. The first protrusion 31213 is located between the first housing cavity 31212 and the first semicircular housing cavity 31211, and separates the first housing cavity 31212 and the first semicircular housing cavity 31211. Correspondingly, a second housing cavity 31222 is provided at one end of the second housing 3122 away from the front cover 311, and the second housing 3122 has a second protrusion 31223 extending toward the first housing 3121. The second protrusion 31223 is located between the second housing cavity 31222 and the second semicircular housing cavity 31221, and separates the second housing cavity 31222 and the second semicircular housing cavity 31221. The first protrusion 31213 and the second protrusion 31223 are arranged opposite to each other along the height direction h of the circuit breaker 30. The first accommodating chamber 31212 and the second accommodating chamber 31222 are arranged opposite to each other along the height direction h of the circuit breaker 30, and together form an accommodating chamber for accommodating the arc extinguishing chamber 35 and the static contact 342. In this way, during the rotation of the rotating housing 3412, the accommodating chamber is always isolated from the circular accommodating chamber by the rotating housing 3412, thereby achieving electrical isolation of the components in the two chambers.

[0099] Figure 7 Another schematic diagram of a circuit breaker provided in an embodiment of the present application. Figure 7 As shown, the rear cover assembly 312 may further include a first insulating housing 3123 and a second insulating housing 3124. The first insulating housing 3123 is disposed on a side of the first housing 3121 away from the second housing 3122, and the first insulating housing 3123 and the first housing 3121 are connected. The second insulating housing 3124 is disposed on a side of the second housing 3122 away from the first housing 3121, and the second insulating housing 3124 and the second housing 3122 are connected. That is, the first insulating housing 3123, the first housing 3121, the second housing 3122, and the second insulating housing 3124 are sequentially disposed along the height direction h of the circuit breaker 30.

[0100] Please continue reading Figure 7 , the current-carrying assembly 34 further includes a wire 343, a first copper bar 344 and a second copper bar 345. The first copper bar 344 and the second copper bar 345 are arranged opposite to each other along the height direction h of the circuit breaker 30, and the first copper bar 344 and the second copper bar 345 extend to both sides of the arc extinguishing chamber 35 along the depth direction d of the circuit breaker 30. One end of the first copper bar 344 close to the operating mechanism 33 is electrically connected to the moving contact 3411 through the wire 343. The static contact 342 is arranged on the second copper bar 345 and the static contact 342 is electrically connected to the second copper bar 345. Along the depth direction d of the circuit breaker 30, the first copper bar 344 and the second copper bar 345 are located on both sides of the arc extinguishing chamber 35.

[0101] In one embodiment, the first copper bar 344 may be located between the first insulating housing 3123 and the first housing 3121, and the second copper bar 345 may be located between the first housing 3121 and the second housing 3122. In other words, the first copper bar 344 is installed on a side of the first housing 3121 close to the first insulating housing 3123, and the first insulating housing 3123 covers the first housing 3121. The second copper bar 345 is installed on a side of the second housing 3122 close to the first housing 3121, and the first housing 3121 covers the second housing 3122. Figure 8 Another schematic diagram of a circuit breaker provided in an embodiment of the present application. Figure 8 As shown, in another embodiment, the first copper bar 344 may also be located between the second housing 3122 and the second insulating housing 3124. The second copper bar 345 is located between the first housing 3121 and the second housing 3122. In other words, the first copper bar 344 is installed on a side of the second housing 3122 close to the second insulating housing 3124, and the second insulating housing 3124 covers the second housing 3122. The second copper bar 345 is installed on a side of the second housing 3122 close to the first housing 3121, and the first housing 3121 covers the second housing 3122.

[0102] In the above embodiment, the flow assembly 34 can be assembled along the height direction h of the circuit breaker 30. The first copper bar 344 and the second copper bar 345 are spaced relatively large, so that a relatively large electrical gap can be achieved, thereby improving the safety of the circuit breaker 30. In addition, the first copper bar 344 and the second copper bar 345 are respectively arranged close to the insulating housing of the circuit breaker 30 and close to the surface of the circuit breaker 30, thereby improving the heat dissipation of the flow assembly 34.

[0103] Please continue reading Figure 7 and Figure 8, the circuit breaker 30 may further include a backup protector 36. The backup protector 36 includes a static iron core 361 and a moving iron core 362. The operating mechanism 33 includes a lock assembly 331 and an operating assembly 332, the operating assembly 332 is connected to the operating handle 32 and the operating assembly 332 is connected to the moving contact 3411, and the lock assembly 331 is used to lock or unlock the movement of the operating assembly 332. The backup protector 36 of the present application is used to generate a magnetic force on the moving iron core 362 by the static iron core 361 when a fault current is detected, so that the moving iron core 362 moves along the depth direction d of the circuit breaker 30, so as to control the lock assembly 331 to drive the operating assembly 332 to move, so as to separate the moving contact 3411 from the static contact 342. When the backup protector 36 is specifically set, the backup protector 36 can be set close to the second copper busbar 345. In one embodiment, the static contact 342 is installed on the second housing 3122. The static iron core 361 is installed on the static contact 342, and the moving iron core 362 is installed between the second shell 3122 and the second insulating shell 3124. In another embodiment, the static contact 342 is installed on the first shell 3121. The static iron core 361 is installed on the second copper bar 345, and the moving iron core 362 is installed between the first shell 3121 and the first insulating shell 3123. In this embodiment, the backup protector 36 can be limited by two layers of shells, and the backup protector 36 controls the operating mechanism 33 by sliding along the depth direction d of the circuit breaker 30, without the need to additionally set up other supporting structures or guiding structures, thereby reducing the size of the backup protector 36 along the height direction h of the circuit breaker 30.

[0104] Fig. 9 Another schematic diagram of a circuit breaker provided in an embodiment of the present application. Fig. 9As shown, in another embodiment, the first insulating housing 3123 is located on a side of the second housing 3122 away from the first housing 3121, and the first insulating housing 3123 is connected to the second housing 3122. The second insulating housing 3124 is located on a side of the first insulating housing 3123 away from the second housing 3122, and the second insulating housing 3124 is connected to the first insulating housing 3123. That is, the first housing 3121, the second housing 3122, the first insulating housing 3123 and the second insulating housing 3124 are sequentially arranged along the height direction h of the circuit breaker 30. In this embodiment, the first copper bar 344 and the second copper bar 345 are relatively arranged along the height direction h of the circuit breaker d, and the first copper bar 344 and the second copper bar 345 are located on the same side of the arc extinguishing chamber 35, and the first copper bar 344 and the second copper bar 345 extend along the depth direction d of the circuit breaker 30. The first copper bar 344 is located between the second housing 3122 and the first insulating housing 3123, and the second copper bar 345 is located between the first housing 3121 and the second housing 3122. In other words, the first copper bar 344 is installed on a side of the second housing 3122 close to the first insulating housing 3123, and the first insulating housing 3123 covers the second housing 3122. The second copper bar 345 is installed on a side of the second housing 3122 close to the first housing 3121, and the first housing 3121 covers the second housing 3122.

[0105] In the above embodiment, when the backup protector 36 is specifically provided, the static iron core 361 is installed on the first copper bar 344, and the moving iron core 362 is installed between the first insulating shell 3123 and the second insulating shell 3124. In this embodiment, the backup protector 36 can be limited by two layers of shells, and the moving iron core 362 moves between the two layers of shells along the depth direction d of the circuit breaker 30 without additionally providing other supporting structures or guiding structures, thereby reducing the size of the backup protector 36 along the height direction h of the circuit breaker 30.

[0106] In the above embodiment, the first insulating housing 3123 and the second insulating housing 3124 do not need to be used to support the through-current assembly 34 and the arc extinguishing chamber 35, and the first insulating housing 3123 and the second insulating housing 3124 can be made of insulating materials. Therefore, the selection of materials for the first insulating housing 3123 and the second insulating housing 3124 does not require high strength requirements, which can improve the versatility of materials and reduce the manufacturing cost of the circuit breaker 30. In another embodiment, the first insulating housing 3123 and the second insulating housing 3124 can also be used to support the through-current assembly 34 and the arc extinguishing chamber 35.

[0107] Fig.10 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig.11 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig.12Another schematic diagram of a circuit breaker provided in an embodiment of the present application. Fig.10 , Fig.11 and Fig.12 As shown, a first connector 346 is provided at one end of the first copper bar 344 away from the operating mechanism 33. A second connector 347 is provided at one end of the second copper bar 345 away from the operating mechanism 33. The housing 31 further comprises a terminal cover 313, and the terminal cover 313 is connected to one end of the rear cover assembly 312 away from the front cover 311, that is, the front cover 311, the rear cover assembly 312 and the terminal cover 313 are sequentially arranged along the depth direction d of the circuit breaker 30. The first connector 346 and the second connector 347 are located in the terminal cover 313, and the first connector 346 is fixedly connected to the first copper bar 344, and the second connector 347 is fixedly connected to the second copper bar 345. In this way, the front cover 311 and the terminal cover 313 can be installed from both sides of the rear cover assembly 312 along the depth direction d of the circuit breaker 30, so that the overall installation method of the circuit breaker 30 is simpler and more flexible.

[0108] The above-mentioned circuit breaker 30 also includes an arc extinguishing module 37. The arc extinguishing module 37 is used to purify the gas ejected from the arc extinguishing chamber 35. The arc extinguishing module 37 is located on the side of the arc extinguishing chamber 35 away from the moving contact assembly 341 along the depth direction d of the circuit breaker 30. In one embodiment, the part of the arc extinguishing module 37 close to the arc extinguishing chamber 35 is located in the rear cover assembly 312, and the part of the arc extinguishing module 37 away from the arc extinguishing chamber 35 is located in the terminal cover 313. In another embodiment, the arc extinguishing module 37 is located in the rear cover assembly 312. In this way, the arc extinguishing module 37 and the arc extinguishing chamber 35 are jointly accommodated between the first shell 3121 and the second shell 3122, so that the first shell 3121 and the second shell 3122 are connected in an airtight manner, so that the gas discharged from the rear cover assembly 312 has been filtered of the ions.

[0109] Fig.13 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig.14 for Fig.13 Schematic diagram of the explosion of the circuit breaker. Fig.15 for Fig.13 The cross-sectional view of the circuit breaker along the BB direction, Fig.16 Another schematic diagram of the first shell and the second shell provided in the embodiment of the present application. Figures 13 to 16 As shown, the rear cover assembly 312 may further include a middle shell 3125. The middle shell 3125 is located between the front cover 311 and the first housing 3121 along the depth direction d of the circuit breaker 30. Fig.17 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig.18 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig.19 Another schematic diagram of a circuit breaker provided in an embodiment of the present application. Fig.17 , Fig.18 and Fig.19 As shown, along the depth direction d of the circuit breaker 30, one side of the middle shell 3125 is connected to the front cover 311, and the other side is connected to the first shell 3121 and the second shell 3122. At least the part of the operating handle 32 close to the operating mechanism 33, and at least the part of the operating mechanism 33 close to the operating handle 32 are located in the middle shell 3125. Therefore, the middle shell 3125 can be used to support the operating mechanism 33, thereby reducing the strength requirements of the first shell 3121 and the second shell 3122. In addition, the middle shell 3125 and the rear cover assembly 312 can achieve the electrical spacing between the operating mechanism 33 and the moving contact assembly 341 from the structural point of view.

[0110] Fig. 20 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig.21 Another schematic diagram of a circuit breaker provided in an embodiment of the present application, Fig. 22 Another schematic diagram of a circuit breaker provided in an embodiment of the present application. Fig. 20 , Fig.21 and Fig. 22 As shown, in one embodiment, the housing 31 includes a front cover 311, a rear cover assembly 312, and a terminal cover 313 which are sequentially connected along the depth direction d of the circuit breaker 30. The rear cover assembly 312 includes a middle shell 3125, and a first shell 3121, a second shell 3122, a first insulating shell 3123, and a second insulating shell 3124 which are located on a side of the middle shell 3125 away from the front cover 311, and the first shell 3121, the second shell 3122, the first insulating shell 3123, and the second insulating shell 3124 are arranged along the height direction h of the circuit breaker 30. In this embodiment, the front cover 311 and the terminal cover 313 can be assembled with the rear cover assembly 312 from both sides of the rear cover assembly 312, and the first shell 3121, the second shell 3122, the first insulating shell 3123, and the second insulating shell 3124 of the rear cover assembly 312 can be assembled along the height direction h of the circuit breaker 30, and then assembled with the middle shell 3125 along the depth direction d of the circuit breaker 30. Therefore, assembling the casing 31 of the circuit breaker 30 from two different directions facilitates the assembly of the various parts of the casing 31, and in the process of assembling the casing 31, it is also convenient to assemble the various components (operating handle 32, operating mechanism 33, moving contact assembly 341, arc extinguishing chamber 35, backup protector 36 and arc extinguishing module 37) with the various parts of the casing 31.

[0111] In one embodiment, the circuit breaker 30 further includes a mutual inductor 38 and a controller 39. The controller 39 is disposed on one side of the operating mechanism 33 along the width d direction of the circuit breaker 20. The mutual inductor 38 is electrically connected to the controller 39. The mutual inductor 38 is disposed on one side of the moving contact 3411 along the height h direction of the circuit breaker 30, and can be specifically located at one end of the second copper bar 345 close to the operating mechanism 33. The mutual inductor 38 is used to send a fault current signal to the controller 39 through the mutual inductor line when a fault current is detected. Specifically, in one embodiment, the first housing 3121 or the second housing 3122 can be provided with an installation cavity 31214, and the mutual inductor 38 is located in the installation cavity 31214. In another embodiment, the first housing 3121 or the second housing 3122 can be provided with a groove, and the middle housing 3125 and the groove form an installation cavity 31214, and the mutual inductor 38 is located in the installation cavity 31214.

[0112] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An electric power device, characterized in that: The invention comprises a cabinet and a plurality of circuit breakers and a plurality of power modules located in the cabinet, wherein the plurality of circuit breakers are sequentially arranged in the cabinet along the width direction of the cabinet, the height direction of the circuit breaker is in the same direction as the width direction of the cabinet, the width direction of the circuit breaker is in the same direction as the height direction of the cabinet, and the depth direction of the circuit breaker is in the same direction as the depth direction of the cabinet; The circuit breaker comprises a housing, an operating handle, an operating mechanism and a flow assembly; the operating handle is connected to the operating mechanism, the flow assembly comprises a moving contact assembly and a stationary contact, the moving contact assembly comprises a moving contact rotatable relative to the housing, the stationary contact is located on a side of the moving contact assembly away from the operating mechanism along the depth direction of the circuit breaker; the operating handle is used to control the operating mechanism to drive the moving contact to move so that the moving contact contacts or separates from the stationary contact; the housing comprises a front cover and a rear cover assembly sequentially arranged along the depth direction of the circuit breaker; at least a portion of the operating handle close to the operating mechanism, the operating mechanism and the moving contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is arranged close to the front cover; The front cover is provided with an opening, and one end of the operating handle away from the operating mechanism passes through the opening and extends out of the housing; The rear cover assembly includes a first shell and a second shell which are sequentially arranged and connected along the height direction of the circuit breaker, and at least a portion of the operating mechanism close to the moving contact assembly, the moving contact assembly and the stationary contact are located between the first shell and the second shell.

2. The electric power equipment according to claim 1, characterized in that: The back cover assembly further includes a first insulating shell and a second insulating shell, wherein the first insulating shell is connected to a side of the first shell away from the second shell, and the second insulating shell is connected to a side of the second shell away from the first shell; The circuit breaker further comprises an arc extinguishing chamber, which is located on a side of the current-carrying assembly away from the operating mechanism along the depth direction of the circuit breaker; the arc extinguishing chamber is used to eliminate the arc generated when the moving contact is separated from the static contact; The current-carrying assembly further includes a conductor, and a first copper bar and a second copper bar arranged opposite to each other along the height direction of the circuit breaker, wherein the first copper bar and the second copper bar extend to both sides of the arc extinguishing chamber along the depth direction of the circuit breaker; an end of the first copper bar close to the operating mechanism is electrically connected to the moving contact through the conductor, and the static contact is arranged on the second copper bar and electrically connected to the second copper bar; along the depth direction of the circuit breaker, the first copper bar and the second copper bar are located on both sides of the arc extinguishing chamber; The first copper bar is located between the first insulating shell and the first shell, or the first copper bar is located between the second shell and the second insulating shell; the second copper bar is located between the first shell and the second shell.

3. The electric power equipment according to claim 2, characterized in that: The operating mechanism comprises a locking assembly and an operating assembly, wherein the operating assembly is connected to the operating handle and the operating assembly is connected to the moving contact, and the locking assembly is used to lock or unlock the movement of the operating assembly; The circuit breaker further comprises a backup protector, the backup protector comprises a static iron core and a moving iron core, the locking assembly is in transmission connection with the moving iron core; the backup protector is used for, when a fault current is detected, the static iron core generates a magnetic force on the moving iron core, so that the moving iron core moves along the depth direction of the circuit breaker, so as to control the locking assembly to drive the operating assembly to move, so as to separate the moving contact from the static contact; The stationary contact is mounted on the second housing, the stationary iron core is mounted on the stationary contact, and the moving iron core is mounted between the second housing and the second insulating housing; or, The static contact is installed on the first housing, the static iron core is installed on the second copper bar, and the moving iron core is installed between the first housing and the first insulating housing.

4. The electric power equipment according to claim 1, characterized in that: The back cover assembly further includes a first insulating shell and a second insulating shell, wherein the first insulating shell is connected to a side of the second shell away from the first shell, and the second insulating shell is connected to a side of the first insulating shell away from the second shell; The circuit breaker further comprises an arc extinguishing chamber, which is located on a side of the current-carrying assembly away from the operating mechanism along the depth direction of the circuit breaker; the arc extinguishing chamber is used to eliminate the arc generated when the moving contact is separated from the static contact; The current-carrying assembly further includes a wire, a first copper bar and a second copper bar, wherein the first copper bar and the second copper bar are arranged opposite to each other along the height direction of the circuit breaker and are located on the same side of the arc extinguishing chamber, and the first copper bar and the second copper bar extend along the depth direction of the circuit breaker; an end of the first copper bar close to the operating mechanism is electrically connected to the moving contact through the wire, and the static contact is arranged on the second copper bar and electrically connected to the second copper bar; The first copper bar is located between the second shell and the first insulating shell, and the second copper bar is located between the first shell and the second shell.

5. The electric power equipment according to claim 4, characterized in that: The operating mechanism comprises a locking assembly and an operating assembly, wherein the operating assembly is connected to the operating handle and the operating assembly is connected to the moving contact, and the locking assembly is used to lock or unlock the movement of the operating assembly; The circuit breaker further comprises a backup protector, the backup protector comprises a static iron core and a moving iron core, the locking assembly is in transmission connection with the moving iron core; the backup protector is used for, when a fault current is detected, the static iron core generates a magnetic force on the moving iron core, so that the moving iron core moves along the depth direction of the circuit breaker, so as to control the locking assembly to drive the operating assembly to move, so as to separate the moving contact from the static contact; The static iron core is installed on the first copper bar, and the moving iron core is installed between the first insulating shell and the second insulating shell.

6. The electric power equipment according to any one of claims 1 to 5, characterized in that: The rear cover assembly also includes a middle shell, which is located between the front cover and the first shell along the depth direction of the circuit breaker; along the depth direction of the circuit breaker, one side of the middle shell is connected to the front cover, and the other side is connected to the first shell and the second shell, and at least a part of the operating handle close to the operating mechanism and at least a part of the operating mechanism close to the operating handle are located in the middle shell.

7. The electric power equipment according to any one of claims 1 to 5, characterized in that: A first semicircular accommodating cavity is disposed at one end of the first shell body close to the front cover, and a second semicircular accommodating cavity is disposed at one end of the second shell body close to the front cover. The first semicircular accommodating cavity and the second semicircular accommodating cavity are arranged opposite to each other along the height direction of the circuit breaker and together form a circular accommodating cavity. The moving contact assembly includes a rotating shell having a semicircular surface arranged toward the stationary contact, the semicircular surface matches the inner surface shape of the circular accommodating cavity, and the rotating shell is confined in the circular accommodating cavity and can rotate in the circular accommodating cavity.

8. The electric power equipment according to claim 7, characterized in that: A first accommodating cavity is disposed at one end of the first shell away from the front cover, the first shell has a first protrusion extending toward the second shell, the first protrusion is located between the first accommodating cavity and the first semicircular accommodating cavity, and separates the first accommodating cavity and the first semicircular accommodating cavity; A second accommodating cavity is provided at one end of the second shell away from the front cover, and the second shell has a second protrusion extending toward the first shell, the second protrusion is located between the second accommodating cavity and the second semicircular accommodating cavity, and separates the second accommodating cavity and the second semicircular accommodating cavity; the first protrusion and the second protrusion are arranged opposite to each other along the height direction of the circuit breaker; the first accommodating cavity and the second accommodating cavity are arranged opposite to each other along the height direction of the circuit breaker, and jointly form an accommodating cavity for accommodating the static contact.

9. The electric power equipment according to any one of claims 2 to 5, characterized in that: A first joint is provided at one end of the first copper bar away from the operating mechanism; a second joint is provided at one end of the second copper bar away from the operating mechanism; The housing further comprises a terminal cover, wherein the terminal cover is connected to an end of the rear cover assembly away from the front cover, and the first connector and the second connector are respectively located in the terminal cover.

10. The electric power device according to claim 9, characterized in that: The circuit breaker also includes an arc extinguishing module, which is used to purify the gas ejected from the arc extinguishing chamber; the arc extinguishing module is located on the side of the arc extinguishing chamber away from the moving contact assembly along the depth direction of the circuit breaker, the part of the arc extinguishing module close to the arc extinguishing chamber is located in the rear cover assembly, and the part of the arc extinguishing module away from the arc extinguishing chamber is located in the terminal cover.

11. A circuit breaker, characterized in that: The circuit breaker comprises a housing, an operating handle, an operating mechanism and a flow assembly, wherein: The operating handle is connected to the operating mechanism, the flow assembly includes a moving contact assembly and a static contact, the moving contact assembly includes a moving contact that can rotate relative to the housing, and the static contact is located on a side of the moving contact assembly away from the operating mechanism along the depth direction of the circuit breaker; the operating handle is used to control the operating mechanism to drive the moving contact to move, so that the moving contact is in contact with or separated from the static contact; the housing includes a front cover and a rear cover assembly sequentially arranged along the depth direction of the circuit breaker; at least a portion of the operating handle close to the operating mechanism, the operating mechanism and the moving contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is arranged close to the front cover; The front cover is provided with an opening, and one end of the operating handle away from the operating mechanism passes through the opening and extends out of the housing; The rear cover assembly includes a first shell and a second shell which are sequentially arranged and connected along the height direction of the circuit breaker, and at least a portion of the operating mechanism close to the moving contact assembly, the moving contact assembly and the stationary contact are located between the first shell and the second shell.

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