Circuit breaker and power equipment

Abstract

A circuit breaker (30) and a power device (20). The circuit breaker includes a housing (31). The shell comprises a front cover (311) and a rear cover assembly (312) which are sequentially arranged in the depth direction of the circuit breaker. And at least one part of the operating handle (32), which is close to the operating mechanism (33), the operating mechanism and the moving contact assembly (341) are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker. The rear cover assembly comprises a first shell (3121) and a second shell (3122) which are sequentially arranged and connected in the height direction of the circuit breaker. The operating mechanism is at least close to a portion of the moving contact assembly, the moving contact assembly and the static contact (342) are located between the first housing and the second housing. The shell of the circuit breaker 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

A circuit breaker and power equipment

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202420701205.1, filed on April 7, 2024, and entitled “A Circuit Breaker and Power Equipment”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of power equipment, and in particular to a circuit breaker and power equipment. BACKGROUND

[0004] With the gradual application of artificial intelligence (AI) technology, 5.5G, autonomous driving and other technologies in people's daily life and work, the demand for computing power of these technologies has also increased substantially. As a key field supporting computing power, data centers require ultra-high capacity and high density. Uninterruptible power supply (UPS) as an indispensable core unit in modern data centers is further miniaturized under the leadership of capacity upgrade and high density trends.

[0005] In the power supply and distribution system of a data center, a circuit breaker is usually used to distribute electrical energy. As a key device in the power supply and distribution system, the circuit breaker not only has the function of controlling the on and off of the circuit, but also has a certain protection function. Specifically, a mechanical switch can be provided in the circuit breaker, and the working personnel can switch the closed or open state of the circuit breaker by operating the mechanical switch, so as to realize the conduction or disconnection of the circuit. In addition, when the circuit has an overload, short circuit or other fault, the circuit breaker can also automatically switch to the open state to disconnect the current in the circuit, thereby realizing its protection function.

[0006] The shell of the existing circuit breaker usually includes multiple layers of housings. When assembling the circuit breaker, the multiple layers of housings need to be assembled in sequence in one direction, and a large number of fasteners need to be used for fixation. However, due to the complex positional relationship between the various components inside the circuit breaker, the single-directional stacking installation of the multiple layers of housings will cause difficulty in assembling the components. SUMMARY

[0007] The present application provides a circuit breaker and power equipment, so that the shell structure of the circuit breaker can be assembled in different directions, thereby simplifying the assembly operation of the circuit breaker.

[0008] In a first aspect, the present application provides a power device. The power device comprises a cabinet and a plurality of circuit breakers and a plurality of power modules located in the cabinet. The plurality of circuit breakers are sequentially arranged in the cabinet along a width direction of the cabinet. The height direction of the circuit breaker is the same as the width direction of the cabinet. The width direction of the circuit breaker is the same as the height direction of the cabinet. The depth direction of the circuit breaker is the same as the depth direction of the cabinet. Specifically, the circuit breaker comprises a housing, an operating handle, an operating mechanism and a through-flow assembly. The operating handle is connected to the operating mechanism. The through-flow assembly comprises a movable contact assembly and a stationary contact. The movable contact assembly comprises a movable contact which is rotatable relative to the housing. The stationary contact is located on the side of the movable 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 movable contact to move so as to make the movable contact contact or separate from the stationary contact. In addition, the housing comprises a front cover and a rear cover assembly which are sequentially arranged along the depth direction of the circuit breaker. The part of the operating handle close to the operating mechanism, the operating mechanism and the movable contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker. The operating handle is close to the front cover. The front cover is provided with an opening. 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 comprises a first housing and a second housing which are sequentially arranged and connected along the height direction of the circuit breaker. The part of the operating mechanism close to the movable contact assembly, the movable contact assembly and the stationary contact are located between the first housing and the second housing.

[0009] The circuit breaker has a circuit breaker operation surface for a worker to perform closing operation and opening operation, view the working state of the circuit breaker and the like. In the plane where the circuit breaker operation surface is located, the size of the circuit breaker along the pushing direction of the operating handle is the height, and the size of the circuit breaker perpendicular to the height direction is the width. The size of the circuit breaker along the direction perpendicular to the circuit breaker operation surface is the depth. The circuit breaker of the present application can be applied to a power supply and distribution system. The circuit breaker can be installed in a cabinet. Similarly, the cabinet has a user operation surface for a worker to perform control operation, installation and disassembly, or maintenance and the like. The circuit breaker operation surface of the circuit breaker and the user operation surface face the same direction. Taking the state that the cabinet is placed on the ground as an example, in the plane where the user operation surface is located, the size of the cabinet parallel to the ground is the width, and the size of the cabinet perpendicular to the ground is the height. The size of the cabinet perpendicular to the user operation surface is the depth. When a plurality of the above-mentioned circuit breakers are installed in the cabinet, the circuit breakers are placed in parallel along the width direction of the cabinet. The circuit breaker operation surface of the circuit breaker and the user operation surface of the cabinet face the same direction. The height direction of each circuit breaker is the same as the width direction of the cabinet. The width direction of each circuit breaker is the same as the height direction of the cabinet. The depth direction of each circuit breaker is the same as the depth direction of the cabinet, that is, each circuit breaker is placed transversely in the cabinet.

[0010] In the power device of the present application, the part of the operating handle of the circuit breaker close to the operating mechanism, the operating mechanism and the movable contact assembly are arranged along the depth direction of the circuit breaker, which can be understood as that the part of the operating handle, the operating mechanism and the movable contact assembly are arranged in a layered form along the depth direction of the circuit breaker, so as to reduce the layout of the components along the height direction of the circuit breaker, thereby reducing the height size of the circuit breaker, and further reducing the occupied space of the circuit breaker, so as to increase the layout quantity of the circuit breakers in the cabinet. The circuit breaker includes a first layer (an electric operation or manual operation layer), a second layer (an operation layer) and a third layer (a through-flow layer). When the circuit breaker is specifically arranged, the operating handle is located in the first layer, the operating mechanism is located in the second layer, and the through-flow assembly is located in 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 shell of the circuit breaker can be assembled along two different directions, so as to improve the single direction stacking of the shell, and further facilitate the flexible assembly of the components in the circuit breaker.

[0011] In one possible implementation, the rear cover assembly can further include a first insulating shell and a second insulating shell. The first insulating shell is connected to the side of the first shell away from the second shell, and the second insulating shell is connected to the 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 further includes an arc-extinguishing chamber, which is located on the side of the through-flow 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 movable contact separates from the static contact. The through-flow assembly further 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 movable contact through the wire. The static contact is arranged on the second copper bar and 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 through-flow assembly can be assembled along the height direction of the circuit breaker. The distance 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, so that the heat dissipation is good.

[0012] The circuit breaker can further include a backup protector. The backup protector includes a static iron core and a dynamic iron core. The operating mechanism includes a lock catch assembly and an operating assembly, the operating assembly being connected with the operating handle and the operating assembly being connected with the movable contact, and the lock catch assembly being used for locking or unlocking the movement of the operating assembly. The backup protector of the present application is used for generating a magnetic force on the dynamic iron core by the static iron core when a fault current is detected, so as to move the dynamic iron core in the depth direction of the circuit breaker, to control the lock catch assembly to drive the operating assembly to move, so as to separate the movable contact from the static contact. When the backup protector is specifically arranged, the backup protector can be arranged close to the second copper bar. In one possible implementation, the static contact is mounted on the second shell. The static iron core is mounted on the static contact, and the dynamic iron core is mounted between the second shell and the second insulating shell. In another possible implementation, the static contact is mounted on the first shell. The static iron core is mounted on the second copper bar, and the dynamic iron core is mounted between the first shell and the first insulating shell. In the technical solution, the backup protector can be limited by two layers of shells, and the dynamic iron core moves in the depth direction of the circuit breaker between the two layers of shells, without the need for additionally arranging other supporting structures or guiding structures, so that the size of the backup protector in the height direction of the circuit breaker can be reduced.

[0013] In another possible implementation, the back cover assembly can further include a first insulating shell and a second insulating shell. The first insulating shell is connected to the second shell away from the first shell, and the second insulating shell is connected to the first insulating shell away from the second shell. That is, the first shell, the second shell, the first insulating shell, and the second insulating shell are arranged in sequence in the height direction of the circuit breaker. The circuit breaker further includes an arc extinguishing chamber, which is located on the side of the through-flow assembly away from the operating mechanism in the depth direction of the circuit breaker. The arc extinguishing chamber is used for eliminating the arc generated when the movable contact is separated from the static contact. The through-flow assembly further includes a wire, a first copper bar, and a second copper bar. The first copper bar and the second copper bar are oppositely arranged on the same side of the arc extinguishing chamber in the height direction of the circuit breaker and extend in the depth direction of the circuit breaker. One end of the first copper bar close to the operating mechanism is electrically connected with the movable contact through the wire, and the static contact is arranged on the second copper bar and is electrically connected with 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.

[0014] The circuit breaker can further comprise a backup protector. The backup protector comprises a static iron core and a dynamic iron core. The operating mechanism comprises a lock catch assembly and an operating assembly, the operating assembly is connected with the operating handle and the operating assembly is connected with the movable contact, and the lock catch assembly is used for locking or unlocking the movement of the operating assembly. The backup protector of the present application is used for generating a magnetic force on the dynamic iron core by the static iron core when a fault current is detected, so as to move the dynamic iron core along the depth direction of the circuit breaker, control the lock catch assembly to drive the operating assembly to move, and thus separate the movable contact from the static contact. When the backup protector is specifically arranged, the static iron core is mounted on the first copper bar, and the dynamic iron core is mounted between the first insulating shell and the second insulating shell. In the technical solution, the backup protector can be limited by two layers of shells, and the dynamic iron core moves along the depth direction of the circuit breaker between the two layers of shells, without the need for additional support structures or guide structures, so that the size of the backup protector in the height direction of the circuit breaker can be reduced.

[0015] In one possible implementation, the rear cover assembly can further comprise a middle shell. The middle shell is located between the front cover and the first shell along the depth direction of the circuit breaker. One side of the middle shell is connected with the front cover, and the other side of the middle shell is connected with the first shell and the second shell along the depth direction of the circuit breaker. The part of the operating handle close to the operating mechanism and the part 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, so as to reduce the strength requirement of the first shell and the second shell. Moreover, the middle shell and the rear cover assembly can achieve electrical spacing between the operating mechanism and the movable contact assembly in structure.

[0016] In one possible implementation, the first shell is provided with a first semicircular accommodating cavity at one end close to the front cover, and the second shell is provided with a second semicircular accommodating cavity at one end close to the front cover. The first semicircular accommodating cavity and the second semicircular accommodating cavity are oppositely arranged along the height direction of the circuit breaker, and together form a circular accommodating cavity. The movable contact assembly comprises a rotating shell, and the rotating shell has a semicircular surface arranged towards the static contact, and the inner surface of the circular accommodating cavity is matched with the shape of the semicircular surface. The rotating shell is limited in the circular accommodating cavity and can rotate in the circular accommodating cavity. In this way, the rotating shell can rotate in the circular accommodating cavity.

[0017] In one possible implementation, the first housing is provided with a first accommodating cavity at an end away from the front cover, and the first housing has a first protruding part extending towards the second housing. The first protruding part is located between and separates the first accommodating cavity and the first semicircular accommodating cavity. Correspondingly, the second housing is provided with a second accommodating cavity at an end away from the front cover, and the second housing has a second protruding part extending towards the first housing. The second protruding part is located between and separates the second accommodating cavity and the second semicircular accommodating cavity. The first protruding part and the second protruding part are oppositely arranged along the height direction of the circuit breaker. The first accommodating cavity and the second accommodating cavity are oppositely arranged along the height direction of the circuit breaker, and together form an accommodating cavity for accommodating the stationary contact. In this way, during rotation of the rotating housing, the accommodating cavity is always isolated from the circular accommodating cavity by the rotating housing, thereby achieving electrical isolation of the components in the two cavities.

[0018] In one possible implementation, the first copper bar is provided with a first connector at an end away from the operating mechanism. The second copper bar is provided with a second connector at an end away from the operating mechanism. The housing further includes a terminal cover connected to an 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 connector and the second connector are respectively located in the terminal cover. In this way, the front cover and the terminal cover can be mounted from both sides of the rear cover assembly along the depth direction of the circuit breaker, making the overall installation of the circuit breaker simpler and more flexible.

[0019] The circuit breaker described above further includes an arc extinguishing module. The arc extinguishing module is used to purify the gas sprayed by the arc extinguishing chamber. The arc extinguishing module is located at a side of the arc extinguishing chamber away from the movable contact assembly along the depth direction of the circuit breaker, and a part of the arc extinguishing module close to the arc extinguishing chamber is located in the rear cover assembly, and a part of the arc extinguishing module away from the arc extinguishing chamber is located in the terminal cover.

[0020] In a second aspect, the present application provides a circuit breaker. The circuit breaker comprises a housing, an operating handle, an operating mechanism and a through-flow assembly. Specifically, the operating handle is connected with the operating mechanism. The through-flow assembly comprises a moving contact assembly and a stationary contact, the moving contact assembly comprises a moving contact rotatable relative to the housing, and the stationary contact is located on a side of the moving contact assembly away from the operating mechanism along a 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. In addition, the housing comprises a front cover and a rear cover assembly arranged in sequence along the depth direction of the circuit breaker. The operating handle at least near the operating mechanism, the operating mechanism and the moving contact assembly are arranged in sequence along the depth direction of the circuit breaker in the rear cover assembly, and the operating handle is arranged near 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 comprises a first shell and a second shell arranged in sequence and connected along a height direction of the circuit breaker, and the operating mechanism at least near the moving contact assembly, the moving contact assembly and the stationary contact are located between the first shell and the second shell.

[0021] The circuit breaker has a circuit breaker operation surface for an operator to perform closing operation and opening operation, view the working state of the circuit breaker and the like. In a plane where the circuit breaker operation surface is located, the size of the circuit breaker along the pushing direction of the operating handle is the height, and the size of the circuit breaker perpendicular to the height direction is the width. The size of the circuit breaker along the direction perpendicular to the circuit breaker operation surface is the depth. The circuit breaker of the present application can be applied to a power distribution system, and the circuit breaker can be installed in a cabinet. In the power equipment of the present application, the part of the operating handle near the operating mechanism, the operating mechanism and the moving contact assembly of the circuit breaker are arranged along the depth direction of the circuit breaker, which can be understood as 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 along the height direction of the circuit breaker can be reduced, the height size of the circuit breaker is reduced, and the occupied space of the circuit breaker is reduced, so that the layout number of the circuit breaker in the cabinet is increased. The circuit breaker comprises a first layer (electric operation or manual operation layer), a second layer (operation layer) and a third layer (through-flow layer). Specifically, the operating handle is located in the first layer, the operating mechanism is located in the second layer, and the through-flow assembly is located in the third layer. In addition, the front cover and the 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 circuit breaker can be assembled along two different directions, the single direction stacking of the housing is improved, and the flexible assembly of the components in the circuit breaker is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0022] FIG. 1 is a schematic diagram of an application scenario of a circuit breaker provided by an embodiment of the present application;

[0023] FIG. 2 is a schematic diagram of a power equipment provided by an embodiment of the present application;

[0024] FIG. 3 is a schematic diagram of a circuit breaker according to an embodiment of the present application;

[0025] FIG. 4 is an exploded schematic diagram of the circuit breaker of FIG. 3;

[0026] FIG. 5 is a cross-sectional view of the circuit breaker of FIG. 3 along the A-A direction;

[0027] FIG. 6 is a schematic diagram of a first housing and a second housing according to an embodiment of the present application;

[0028] FIG. 7 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0029] FIG. 8 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0030] FIG. 9 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0031] FIG. 10 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0032] FIG. 11 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0033] FIG. 12 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0034] FIG. 13 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0035] FIG. 14 is an exploded schematic diagram of the circuit breaker of FIG. 13;

[0036] FIG. 15 is a cross-sectional view of the circuit breaker of FIG. 13 along the B-B direction;

[0037] FIG. 16 is another schematic diagram of a first housing and a second housing according to an embodiment of the present application;

[0038] FIG. 17 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0039] FIG. 18 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0040] FIG. 19 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0041] FIG. 20 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0042] FIG. 21 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

[0043] FIG. 22 is another schematic diagram of a circuit breaker according to an embodiment of the present application.

[0044] 10 - power supply and distribution system 11 - power supply module 20 - power equipment 21 - cabinet 210 - user operation surface 30 - circuit breaker 31 - housing 32 - operation handle 33 - operation mechanism 34 - through-flow assembly 35 - arc extinguishing chamber 36 - backup protector 37 - arc suppression module 38 - transformer 39 - controller 310 - circuit breaker operation surface 311 - front cover 312 - rear cover assembly 313 - terminal cover 331 - lock catch assembly 332 - operation assembly 341 - movable contact assembly 342 - stationary contact 343 - wire 344 - first copper bar 345 - second copper bar 346 - first joint 347 - second joint 3411 - movable contact 3412 - rotating housing 3121 - first housing 3122 - second housing 3123 - first insulating housing 3124 - second insulating housing 3125 - middle housing 31211 - first semicircular receiving cavity 31212 - first receiving cavity 31213 - first protrusion 31214 - mounting cavity 31221 - second semicircular receiving cavity 31222 - second receiving cavity 31223 - second protrusion DETAILED DESCRIPTION

[0045] In order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0046] In order to facilitate the understanding of the circuit breaker and the power equipment provided by the embodiments of the present application, the application scenarios thereof will be described below. The circuit breaker and the power equipment provided by the embodiments of the present application can be widely applied in various power supply and distribution systems. In an example provided by the present application, the circuit breaker can be applied in the power supply and distribution system of a data center, and is used to turn on, carry and break the current between the power supply network and the data center. FIG. 1 is a schematic diagram of the application scenario of the circuit breaker provided by the embodiments of the present application. As shown in FIG. 1, the power supply and distribution system 10 can include a power supply module 11 (such as the power supply module 11 shown in FIG. 1 which is composed of a plurality of UPSs in series) and a plurality of circuit breakers. Taking an example of three circuits in the power supply and distribution system 10, they are a first circuit C1, a second circuit C2 and a third circuit C3. Corresponding circuit breakers are arranged in each circuit, wherein the first circuit C1 is connected with the power supply module 11, and a first circuit breaker K1 is arranged at the input end of the power supply module 11, and a second circuit breaker K2 is arranged at the output end; the second circuit C2 is connected with a bypass module, one end of the bypass module is provided with a third circuit breaker K3, and the other end is connected with the second circuit breaker K2; the third circuit C3 is a standby circuit, and is provided with a fourth circuit breaker K4.

[0047] When it is needed 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 needed 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 on-off state of the data center is controlled by controlling the closed state and the open state of the circuit breaker. When the power equipment of the data center needs to be overhauled or 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 overhauling, maintenance and other work of the power equipment.

[0048] In addition, the circuit breaker of the present application can also be applied to the power supply and distribution system 10 of enterprise power equipment or public power equipment, for connecting, carrying and disconnecting the current between the power supply network and the enterprise power equipment or the public power equipment. For example, when the power equipment (such as a 4G base station, a 5G base station, 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 required for normal work to the power equipment. When the power equipment needs to be overhauled or maintained, the staff can switch the circuit breaker to the open state, so as to facilitate the overhauling, maintenance and other work of the power equipment.

[0049] The above-mentioned power supply and distribution system 10 can specifically include a plurality of power equipment. FIG. 2 is a schematic diagram of the power equipment provided by the embodiment of the present application. As shown in FIG. 2, each power equipment 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. Wherein, the side of the cabinet 21 facing the staff is a user operation surface 210. In the present application, taking the state that 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 above-mentioned plurality of power modules are stacked in sequence along the height direction H of the cabinet 21, and the above-mentioned plurality of circuit breakers are placed on one side of the plurality of power modules along the width direction W of the cabinet 21. Wherein, the power module is used to convert the voltage from the power grid to output an adapted voltage to the load equipment. Specifically, the power module can be an AC / AC module or an AC / DC module.

[0050] In the existing power equipment, the shell of the circuit breaker is a multi-layer structure and is installed in a stacked manner along one direction. However, this installation method is relatively single and is not convenient for the installation of the internal components of the circuit breaker. In view of this, the present application provides a circuit breaker and a power equipment, so that the shell structure of the circuit breaker can be assembled in different directions, thereby simplifying the assembly operation of the circuit breaker.

[0051] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used in this specification and the appended claims, the singular forms "a," "an" and "the" include plural referents unless the context clearly dictates otherwise. The following examples are presented to more fully illustrate the application and are not intended to limit the scope of the application. The examples are presented by way of example only and are not intended to limit the scope of the application.

[0052] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" or "in other embodiments" or "in still other embodiments" in various places throughout this specification are not necessarily all referring to the same embodiment, but can refer to different embodiments. The terms "including," "comprising," "having" and "with" and variations thereof are meant to be inclusive and are intended to be taken exclusively or expansively and not limitatively, unless otherwise expressly specified and / or limited by context. The terms "coupled" and "connected," along with derivatives thereof, mean to be directly or indirectly connected or coupled.

[0053] Fig. 3 is a schematic view of a circuit breaker according to an embodiment of the present application, and Fig. 4 is an exploded schematic view of the circuit breaker of Fig. 3. As shown in Figs. 3 and 4, the circuit breaker 30 includes a housing 31, an operating handle 32, an operating mechanism 33, and a through-flow assembly 34. Specifically, the operating handle 32 is connected to the operating mechanism 33. The through-flow assembly 34 includes a moving contact assembly 341 and a stationary contact 342. The moving contact assembly 341 includes a moving contact 3411 rotatable relative to the housing 31. The stationary contact 342 is located on a side of the moving contact assembly 341 away from the operating mechanism 33 along a depth direction d of the circuit breaker 30. In one embodiment, an end of the operating handle 32 away from the operating mechanism 33 can extend out of the housing 31, so that a worker can push the operating handle 32 to perform closing and opening operations. In another embodiment, the housing 31 is provided with a knob, so that the closing and opening of the circuit breaker 30 can be achieved by knob operation. Specifically, an end of the operating handle 32 away from the operating mechanism 33 is connected to the knob. When a worker performs knob operation, the knob is rotated and drives the operating handle 32 to move along a height direction h of the circuit breaker 30. In another embodiment, the circuit breaker 30 can 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 in communication with the remote controller, so that the closing and opening of the circuit breaker 30 can be achieved by electric operation. When a worker performs electric operation, the worker sends a closing instruction or an opening instruction to the remote controller. The remote controller can control the electric operating device to drive the operating handle 32. In this embodiment, the worker can issue the instruction close to the circuit breaker 30, or the worker can issue the instruction remotely through a communication device. In addition, at least a 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 stationary contact 342 is located on a 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 stationary contact 342. Further, the circuit breaker 30 can further include an arc-extinguishing chamber 35 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 electric arc generated when the moving contact 3411 separates from the stationary contact 342. In one embodiment, the stationary contact 342 is located on a side of the arc-extinguishing chamber 35 along the height direction h of the circuit breaker 30. The moving track of the moving contact 3411 extends from the stationary contact 342 to another side of the arc-extinguishing chamber 35 along the height direction h of the circuit breaker 30.

[0054] In the present application, the side of the operating handle 32 extending out of the shell 31 is the circuit breaker operating face 310. Taking the circuit breaker operating face 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 face 310 is the depth. In other words, the operating handle 32, the operating mechanism 33, the through-flow 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 worker performs the closing operation or the opening operation on the circuit breaker 30, the worker pushes the operating handle 32 along the width direction W of the cabinet 21. When the operating handle 32 is pushed to perform the opening operation or the closing operation, the operating mechanism 33 can move along with the operating handle 32 to separate or contact the moving contact 3411 and the static contact 342. When the moving contact 3411 and the static contact 342 are in contact, the circuit breaker 30 is in the closed state; when the moving contact 3411 and the static contact 342 are separated, the circuit breaker 30 is in the open state.

[0055] FIG. 5 is a sectional view of the circuit breaker in FIG. 3 along the A-A direction. As shown in FIGS. 3, 4, and 5, in the circuit breaker 30 of the present application, the shell 31 includes a front cover 311 and a rear cover assembly 312 sequentially arranged along the depth direction d of the circuit breaker 30. The operating handle 32 at least near 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 near 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 that the height dimension of the circuit breaker 30 can be reduced, the occupied space of the circuit breaker 30 can be reduced, and the layout number of the circuit breaker 30 in the cabinet 21 can be increased. Specifically, the operating handle 32 is located in the first layer (the electric or manual operation layer), the operating mechanism 33 is located in the second layer (the operation layer), a part of the through-flow assembly 34 is located in the third layer (the through-flow layer), and the arc extinguishing chamber 35 is located in the fourth layer (the arc extinguishing layer). Among them, the moving contact 3411 can extend along the depth direction d of the circuit breaker 30, so that the dimension of the moving contact 3411 in the height direction h of the circuit breaker 30 is reduced, which can be beneficial to the minimization of the circuit breaker 30 in the height direction h. Moreover, while the moving contact 3411 is miniaturized, the driving force arm of the moving contact 3411 and the static contact 342 in the closed state can be larger, so that the driving force of the operating mechanism 33 can be reduced, and the operation stability of the operating mechanism 33 can be improved.

[0056] The rear cover assembly 312 includes a first housing 3121 and a second housing 3122 arranged and connected in sequence along the height direction h of the circuit breaker 30. The operating mechanism 33 at least near the portion of the movable contact assembly 341, the movable 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 the fixing of each part of the housing 31 can be fixed by bonding, welding, riveting, clamping or threaded coupling, etc., so as to facilitate the operation. When assembling the housing 31, assembly can be performed in two different directions, so that the problem of single direction stacking can be improved, thereby facilitating the flexible assembly of the components inside the circuit breaker 30.

[0057] In the above embodiment, the first housing 3121 and the second housing 3122 are respectively provided with accommodating cavities to accommodate the operating mechanism 33 at least near the portion of the movable contact assembly 341, the movable contact assembly 341, the static contact 342 and the arc extinguishing chamber 35, and support the aforementioned components. FIG. 6 is a schematic view of the first housing and the second housing provided in the embodiment of the present application. As shown in FIGS. 5 and 6, the first housing 3121 is provided with a first semicircular accommodating cavity 31211 at one end near the front cover 311, and the second housing 3122 is provided with a second semicircular accommodating cavity 31221 at one end near the front cover 311. The first semicircular accommodating cavity 31211 and the second semicircular accommodating cavity 31221 are oppositely arranged along the height direction h of the circuit breaker 30, and together form a circular accommodating cavity. The movable contact assembly 341 includes a rotating housing 3412 having a semicircular surface facing the static contact 342, and the inner surface of the circular accommodating cavity cooperates with the semicircular surface in shape. The rotating housing 3412 is limited in the circular accommodating cavity and can rotate in the circular accommodating cavity. In this way, the rotating housing 3412 can rotate in the circular accommodating cavity.

[0058] In addition, the first shell 3121 is provided with a first accommodating cavity 31212 at an end away from the front cover 311, and the first shell 3121 has a first protruding part 31213 extending towards the second shell 3122. The first protruding part 31213 is located between and separates the first accommodating cavity 31212 and the first semicircular accommodating cavity 31211. Correspondingly, the second shell 3122 is provided with a second accommodating cavity 31222 at an end away from the front cover 311, and the second shell 3122 has a second protruding part 31223 extending towards the first shell 3121. The second protruding part 31223 is located between and separates the second accommodating cavity 31222 and the second semicircular accommodating cavity 31221. The first protruding part 31213 and the second protruding part 31223 are oppositely arranged along the height direction h of the circuit breaker 30. The first accommodating cavity 31212 and the second accommodating cavity 31222 are oppositely arranged along the height direction h of the circuit breaker 30, and together form an accommodating cavity for accommodating the arc extinguishing chamber 35 and the static contact 342. In this way, during rotation of the rotating shell 3412, the accommodating cavity is always isolated from the circular accommodating cavity by the rotating shell 3412, thereby achieving electrical isolation of the components in the two cavities.

[0059] FIG. 7 is another schematic view of the circuit breaker provided in the embodiments of the present application. As shown in FIG. 7, the rear cover assembly 312 can further include a first insulating shell 3123 and a second insulating shell 3124. The first insulating shell 3123 is arranged at a side of the first shell 3121 away from the second shell 3122, and the first insulating shell 3123 is connected with the first shell 3121. The second insulating shell 3124 is arranged at a side of the second shell 3122 away from the first shell 3121, and the second insulating shell 3124 is connected with the second shell 3122. That is, the first insulating shell 3123, the first shell 3121, the second shell 3122, and the second insulating shell 3124 are sequentially arranged along the height direction h of the circuit breaker 30.

[0060] Please continue to refer to FIG. 7, the through-flow 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 oppositely arranged 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. An end of the first copper bar 344 close to the operating mechanism 33 is electrically connected with the movable contact 3411 through the wire 343. The static contact 342 is arranged on the second copper bar 345 and is electrically connected with 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 at both sides of the arc extinguishing chamber 35.

[0061] In one embodiment, the first copper bar 344 is located between the first insulating shell 3123 and the first shell 3121, and the second copper bar 345 is located between the first shell 3121 and the second shell 3122. In other words, the first copper bar 344 is mounted on the side of the first shell 3121 close to the first insulating shell 3123, and the first insulating shell 3123 is covered with the first shell 3121. The second copper bar 345 is mounted on the side of the second shell 3122 close to the first shell 3121, and the first shell 3121 is covered with the second shell 3122. FIG. 8 is another schematic view of the circuit breaker provided in the embodiments of the present application. As shown in FIG. 8, in another embodiment, the first copper bar 344 can also be located between the second shell 3122 and the second insulating shell 3124. The second copper bar 345 is located between the first shell 3121 and the second shell 3122. In other words, the first copper bar 344 is mounted on the side of the second shell 3122 close to the second insulating shell 3124, and the second insulating shell 3124 is covered with the second shell 3122. The second copper bar 345 is mounted on the side of the second shell 3122 close to the first shell 3121, and the first shell 3121 is covered with the second shell 3122.

[0062] In the above embodiment, the through-flow assembly 34 can be assembled along the height direction h of the circuit breaker 30. In this way, the first copper bar 344 and the second copper bar 345 have a large spacing, which can achieve a large electrical gap, thereby improving the safety of the circuit breaker 30. Moreover, the first copper bar 344 and the second copper bar 345 are respectively arranged close to the insulating shell of the circuit breaker 30, close to the surface of the circuit breaker 30, thereby improving the heat dissipation of the through-flow assembly 34.

[0063] Please continue to refer to FIG. 7 and FIG. 8, the circuit breaker 30 can further include a backup protector 36. The backup protector 36 includes a static core 361 and a dynamic core 362. The operating mechanism 33 includes a lock catch assembly 331 and an operating assembly 332, the operating assembly 332 is connected with the operating handle 32 and the operating assembly 332 is connected with the movable contact 3411, and the lock catch 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 dynamic core 362 by the static core 361 when a fault current is detected, so as to move the dynamic core 362 along the depth direction d of the circuit breaker 30, to control the lock catch assembly 331 to drive the operating assembly 332 to move, so as to separate the movable contact 3411 from the static contact 342. When the backup protector 36 is specifically arranged, the backup protector 36 can be arranged close to the second copper bar 345. In an embodiment, the static contact 342 is mounted on the second housing 3122. The static core 361 is mounted on the static contact 342, and the dynamic core 362 is mounted between the second housing 3122 and the second insulating housing 3124. In another embodiment, the static contact 342 is mounted on the first housing 3121. The static core 361 is mounted on the second copper bar 345, and the dynamic core 362 is mounted between the first housing 3121 and the first insulating housing 3123. In this embodiment, the backup protector 36 can be limited by two layers of housings, and the backup protector 36 controls the operating mechanism 33 in a sliding mode along the depth direction d of the circuit breaker 30, without the need to additionally arrange other supporting structures or guiding structures, so as to reduce the size of the backup protector 36 along the height direction h of the circuit breaker 30.

[0064] FIG. 9 is another schematic view of the circuit breaker according to an embodiment of the present application. As shown in FIG. 9, in another embodiment, the first insulating shell 3123 is located on the side of the second shell 3122 away from the first shell 3121, and the first insulating shell 3123 is connected with the second shell 3122. The second insulating shell 3124 is located on the side of the first insulating shell 3123 away from the second shell 3122, and the second insulating shell 3124 is connected with the first insulating shell 3123. That is, the first shell 3121, the second shell 3122, the first insulating shell 3123 and the second insulating shell 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 oppositely 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 shell 3122 and the first insulating shell 3123, and the second copper bar 345 is located between the first shell 3121 and the second shell 3122. In other words, the first copper bar 344 is mounted on the side of the second shell 3122 close to the first insulating shell 3123, and the first insulating shell 3123 covers the second shell 3122. The second copper bar 345 is mounted on the side of the second shell 3122 close to the first shell 3121, and the first shell 3121 covers the second shell 3122.

[0065] In the above embodiment, when the backup protector 36 is specifically arranged, the static iron core 361 is mounted on the first copper bar 344, and the dynamic iron core 362 is mounted 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 dynamic iron core 362 moves between the two layers of shells along the depth direction d of the circuit breaker 30, without the need for additional support structures or guide structures, thereby reducing the size of the backup protector 36 along the height direction h of the circuit breaker 30.

[0066] In the above embodiment, the first insulating shell 3123 and the second insulating shell 3124 do not need to be used to support the through-flow assembly 34 and the arc extinguishing chamber 35, and the first insulating shell 3123 and the second insulating shell 3124 can be made of insulating materials. Therefore, the selection of the first insulating shell 3123 and the second insulating shell 3124 does not require high strength requirements, which can improve the material universality, thereby reducing the manufacturing cost of the circuit breaker 30. In another embodiment, the first insulating shell 3123 and the second insulating shell 3124 can also be used to support the through-flow assembly 34 and the arc extinguishing chamber 35.

[0067] FIG. 10 is another schematic view of the circuit breaker according to an embodiment of the present application, FIG. 11 is another schematic view of the circuit breaker according to an embodiment of the present application, and FIG. 12 is another schematic view of the circuit breaker according to an embodiment of the present application. As shown in FIGS. 10, 11 and 12, the first copper bar 344 is provided with a first connector 346 at an end away from the operating mechanism 33. The second copper bar 345 is provided with a second connector 347 at an end away from the operating mechanism 33. The housing 31 further comprises a terminal cover 313 connected to an end of the back cover assembly 312 away from the front cover 311, that is, the front cover 311, the back 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 mounted from both sides of the back cover assembly 312 along the depth direction d of the circuit breaker 30, so that the overall installation of the circuit breaker 30 is simpler and more flexible.

[0068] The circuit breaker 30 described above further comprises an arc extinguishing module 37. The arc extinguishing module 37 is used to purify the gas sprayed 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 movable 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 back 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 back 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, thereby connecting the first shell 3121 and the second shell 3122 in a gas-tight manner, so that the gas discharged from the back cover assembly 312 has been filtered electrically ionized.

[0069] Figure 13 is another schematic view of the circuit breaker provided in the embodiments of the present application, Figure 14 is an exploded schematic view of the circuit breaker in Figure 13, Figure 15 is a sectional view of the circuit breaker in Figure 13 along the direction of B-B, and Figure 16 is another schematic view of the first shell and the second shell provided in the embodiments of the present application. As shown in Figures 13 to 16, the rear cover assembly 312 can further include a middle shell 3125. The middle shell 3125 is located between the front cover 311 and the first shell 3121 along the depth direction d of the circuit breaker 30. Figure 17 is another schematic view of the circuit breaker provided in the embodiments of the present application, Figure 18 is another schematic view of the circuit breaker provided in the embodiments of the present application, and Figure 19 is another schematic view of the circuit breaker provided in the embodiments of the present application. As shown in Figures 17, 18 and 19, along the depth direction d of the circuit breaker 30, one side of the middle shell 3125 is connected with the front cover 311, and the other side is connected with the first shell 3121 and the second shell 3122. The part of the operating handle 32 close to the operating mechanism 33 and 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 requirement of the first shell 3121 and the second shell 3122. Moreover, the middle shell 3125 and the rear cover assembly 312 can achieve the electrical spacing between the operating mechanism 33 and the movable contact assembly 341 in structure.

[0070] Figure 20 is another schematic view of the circuit breaker provided in the embodiments of the present application, Figure 21 is another schematic view of the circuit breaker provided in the embodiments of the present application, and Figure 22 is another schematic view of the circuit breaker provided in the embodiments of the present application. As shown in Figures 20, 21 and 22, in one embodiment, the housing 31 includes the front cover 311, the rear cover assembly 312 and the terminal cover 313 connected in sequence along the depth direction d of the circuit breaker 30. The rear cover assembly 312 includes the middle shell 3125, and the first shell 3121, the second shell 3122, the first insulating shell 3123 and the second insulating shell 3124 located on the 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 the two 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, the housing 31 of the circuit breaker 30 is assembled from two different directions, which facilitates the assembly between the parts of the housing 31, and facilitates the assembly between the components (the operating handle 32, the operating mechanism 33, the movable contact assembly 341, the arc extinguishing chamber 35, the backup protector 36 and the arc elimination module 37) and the parts of the housing 31 in the process of assembling the housing 31.

[0071] In one embodiment, the circuit breaker 30 further comprises a current transformer 38 and a controller 39. The controller 39 is arranged at one side of the operating mechanism 33 along the width d of the circuit breaker 20. The current transformer 38 is electrically connected with the controller 39. The current transformer 38 is arranged at one side of the movable contact 3411 along the height h of the circuit breaker 30, and specifically can be located at one end of the second copper bar 345 close to the operating mechanism 33. The current transformer 38 is used to send a fault current signal to the controller 39 through a current transformer line when a fault current is detected. Specifically, in one embodiment, the first shell 3121 or the second shell 3122 can be provided with a mounting cavity 31214, and the current transformer 38 is located in the mounting cavity 31214. In another embodiment, the first shell 3121 or the second shell 3122 can be provided with a recess, and the middle shell 3125 forms a mounting cavity 31214 with the recess, and the current transformer 38 is located in the mounting cavity 31214.

[0072] The above merely describes a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, and all of them shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to 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 breakers is in the same direction as the width direction of the cabinet, the width direction of the circuit breakers is in the same direction as the height direction of the cabinet, and the depth direction of the circuit breakers is in the same direction as the depth direction of the cabinet; 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 rotatable relative to the housing, the static contact being 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; 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 proximate to the operating mechanism, the operating mechanism, and the moving contact assembly are sequentially arranged within the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is arranged proximate to the front cover; The front cover is provided with an opening, and an 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. 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.

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 includes an arc extinguishing chamber, which is located on a 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 and the static contact are separated; The current-carrying assembly further includes a conductor, and a first copper bar and a second copper bar disposed opposite each other along the height direction of the circuit breaker. 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 near the operating mechanism is electrically connected to the moving contact via the conductor, and the static contact is disposed on and electrically connected to the second copper bar. The first copper bar and the second copper bar are located on both sides of the arc extinguishing chamber along the depth direction of the circuit breaker. 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 includes 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 includes a backup protector, the backup protector including a static iron core and a movable iron core, the locking assembly being in driving connection with the movable iron core; the backup protector is configured to, when a fault current is detected, cause the static iron core to generate a magnetic force on the movable iron core, causing the movable iron core to move in a depth direction of the circuit breaker, thereby controlling the locking assembly to drive the operating assembly to move, thereby separating the movable contact from the static contact; The static contact is mounted on the second housing, the static iron core is mounted on the static contact, and the movable 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, wherein: 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 includes an arc extinguishing chamber, which is located on a 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 and the static contact are separated; The current-carrying assembly further includes a conductor, a first copper bar, and a second copper bar. The first copper bar and the second copper bar are arranged opposite each other in the height direction of the circuit breaker and are located on the same side of the arc extinguishing chamber. The first copper bar and the second copper bar extend in the depth direction of the circuit breaker. An end of the first copper bar near the operating mechanism is electrically connected to the moving contact via the conductor. The static contact is arranged on 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 includes 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 includes a backup protector, the backup protector including a static iron core and a movable iron core, the locking assembly being in driving connection with the movable iron core; the backup protector is configured to, when a fault current is detected, cause the static iron core to generate a magnetic force on the movable iron core, causing the movable iron core to move in a depth direction of the circuit breaker, thereby controlling the locking assembly to drive the operating assembly to move, thereby separating the movable contact from the static contact; The static iron core is installed on the first copper busbar, 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 the portion of the operating handle close to the operating mechanism and at least the portion of the operating mechanism close to the operating handle are located within 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 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 shell, which has a semicircular surface arranged toward the static contact, the semicircular surface is matched with 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 provided 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 together 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 connector is provided at one end of the first copper bar away from the operating mechanism; a second connector is provided at one end of the second copper bar away from the operating mechanism; The housing further comprises a terminal cover 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 equipment 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 includes 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 is rotatable relative to the housing; 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; 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 proximate to the operating mechanism, the operating mechanism, and the moving contact assembly are sequentially arranged within the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is arranged proximate to the front cover; The front cover is provided with an opening, and an 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. 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.

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