Circuit breaker and electric power device

Abstract

Provided in the present application are a circuit breaker and an electric power device. The circuit breaker comprises a housing, an operating handle, an operating mechanism and a flow-through assembly which are arranged in sequence in the direction of depth of the circuit breaker. A backup protector comprises a static iron core and a movable iron core assembly, wherein the movable iron core assembly comprises a movable iron core, and the static iron core and the movable iron core are arranged in sequence in the direction of depth. The static iron core and the housing are relatively fixed, and the movable iron core is slidably connected to the housing. The movable iron core is spaced apart from the static iron core. A latching assembly is in transmission connection with the movable iron core assembly. The backup protector is configured so that, when a fault current is detected, the static iron core generates a magnetic acting force on the movable iron core, such that the movable iron core assembly moves in the direction of depth of the circuit breaker so as to control the latching assembly to drive an operating assembly to move, and a movable contact is thus separated from a static contact. The backup protector controls the operating mechanism by means of sliding in the direction of depth of the circuit breaker, thereby facilitating the minimization of the circuit breaker in the direction of height.

Description

Circuit breaker and power equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on March 22, 2024, with application number 202420576108.4 and invention name "A circuit breaker and power equipment", the entire contents of which are incorporated by reference into this application. 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 Art

[0004] As technologies like artificial intelligence (AI), 5.5G, and autonomous driving are increasingly integrated into our daily lives and work, the demand for computing power is increasing significantly. Data centers, as a key area supporting this computing power, require ultra-high capacity and high density. Uninterruptible power supplies (UPS), an indispensable core unit in modern data centers, are being further miniaturized in response to the trend toward increased capacity and higher density.

[0005] In the power supply and distribution system of a 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 a fault such as overload or short circuit, the tripping mechanism in the circuit breaker can also switch the circuit breaker to the open state to disconnect the current in the circuit, thereby realizing its protection function. However, the size of the tripping mechanism in the existing circuit breaker is large, which is not conducive to the miniaturization of the circuit breaker in the height direction, resulting in large limitations on the layout and number of circuit breakers in the cabinet, and it is unable to meet the higher requirements of the operating current. Summary of the Invention

[0006] The present application provides a circuit breaker and an electrical device to adjust the size of a backup protector in the height direction of the circuit breaker, which is conducive to the miniaturization of the circuit breaker, thereby changing the space occupied by the circuit breaker in the cabinet, thereby increasing the number of circuit breakers that can be arranged in the cabinet and improving the safety of the circuit breaker.

[0007] In a first aspect, the present application provides an electric power device. The electric power device includes a cabinet, a plurality of circuit breakers, and a plurality of power modules. The aforementioned plurality of power modules are arranged in the cabinet, and the aforementioned plurality of circuit breakers are arranged in sequence in the cabinet along the width direction of the cabinet, wherein 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 current flow assembly. The operating handle is connected to the operating mechanism. The current flow assembly includes a moving contact and a static contact, the moving contact is rotatable relative to the housing, and the static contact is located on the side of the moving contact away from the operating mechanism along the depth direction of the circuit breaker. At least the portion of the operating handle close to the operating mechanism, the operating mechanism, and the moving contact are arranged in sequence in the housing 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 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 circuit breaker may also include a backup protector, the backup protector includes a static iron core and a moving iron core assembly, the moving iron core assembly includes a moving iron core, and the static iron core and the moving iron core are arranged in sequence along the depth direction of the circuit breaker. The static iron core is relatively fixed to the outer shell, and the moving iron core is slidably connected to the outer shell. The moving iron core and the static iron core are spaced apart so that the moving iron core is electrically isolated from the static iron core. The locking assembly is transmission-connected to the moving iron core assembly. The backup protector is used to generate a magnetic force on the moving iron core by the static iron core when a fault current is detected, so that the moving iron core assembly can move along the depth direction of the circuit breaker, so as to control the locking assembly to drive the operating assembly to move, thereby separating the moving contact from the static contact.

[0008] The above-mentioned circuit breaker has a circuit breaker operating surface for 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 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 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 circuit breakers are installed in a 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.

[0009] In the power equipment of the present application, the portion of the operating handle of the circuit breaker near the operating mechanism, the operating mechanism, and the moving contact are arranged along the depth direction of the circuit breaker. This can be understood as the portion of the operating handle, the operating mechanism, the moving contact, and the arc extinguishing chamber being arranged in a layered manner along the depth direction of the circuit breaker. This can reduce the layout of the components of the circuit breaker along the height direction, thereby reducing the height dimension of the circuit breaker, and further reducing the occupied space of the circuit breaker, thereby increasing the number of circuit breakers that can be arranged in the cabinet. The circuit breaker includes a first layer (electrical 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 current flow assembly is located on the third layer. The moving contact can extend along the depth direction of the circuit breaker, thereby reducing the size of the moving contact in the height direction of the circuit breaker, which can facilitate minimization of the height direction of the circuit breaker. In addition, while achieving miniaturization of the moving contact, the driving force arm for closing the moving contact and the static contact can be larger, thereby reducing the driving force of the operating mechanism and facilitating the operational stability of the operating mechanism. In addition, in the power equipment of the present application, the static iron core and the moving iron core assembly of the backup protector are arranged along the depth direction of the circuit breaker, so that the size of the backup protector in the height direction of the circuit breaker is reduced, which can further contribute to the minimization of the circuit breaker in the height direction. Moreover, when a fault current is detected, the static iron core of the backup protector generates an energized induced electromagnetic field, and the moving iron core assembly can move along the depth direction of the circuit breaker under the magnetic force, thereby controlling the locking assembly to drive the operating assembly to move, thereby separating the moving contact from the static contact. Therefore, in this circuit breaker, the backup protector uses a sliding method along the depth direction of the circuit breaker to control the operating mechanism, which can further contribute to the minimization of the circuit breaker in the height direction.

[0010] The above-mentioned current-carrying 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 relative to each other along the height direction of the circuit breaker, and the first copper bar and the second copper bar extend along the depth direction of the circuit breaker. Among them, the 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. Specifically, in one possible implementation, the static iron core is fixedly connected to the static contact. The moving iron core is electrically isolated from the static contact. In another possible implementation, the static iron core is fixedly connected to the first copper bar and electrically connected to the second copper bar through the first copper bar. The moving iron core is electrically isolated from the first copper bar. In another possible implementation, the static iron core is fixedly connected to the second copper bar and electrically connected to the first copper bar through the second copper bar. The moving iron core is electrically isolated from the second copper bar. In the above technical solution, the static iron core can directly detect the current signal of the current-carrying assembly without the need to additionally set up a current-carrying component for the backup protector, further simplifying the structure of the circuit breaker.

[0011] The relative positions of the above-mentioned static iron core and the moving iron core are not limited. In one possible implementation, the moving iron core can be located on the side of the static iron core close to the operating mechanism, and the static iron core generates a magnetic attraction to the moving iron core, so that the moving iron core assembly moves in a direction away from the operating mechanism. In the power equipment of the present application, along the depth direction of the circuit breaker, the moving iron core assembly can move in a direction away from the operating mechanism to drive the locking assembly. Of course, the moving iron core assembly can also move in a direction toward the operating mechanism to drive the locking assembly. In another possible implementation, the moving iron core can be located on the side of the static iron core away from the operating mechanism, and the static iron core generates a magnetic attraction to the moving iron core, so that the moving iron core assembly moves in a direction toward the operating mechanism.

[0012] The above-mentioned static iron core has a first magnetic surface, and the moving iron core has a second magnetic surface. The first magnetic surface is opposite to and parallel to the second magnetic surface, and the first magnetic surface and the second magnetic surface are respectively arranged at an angle to the depth direction of the circuit breaker. For example, in one possible implementation, the angle is 90 degrees, that is, the first magnetic surface and the second magnetic surface are respectively perpendicular to the depth direction of the circuit breaker. The electromagnetic field generated by the static iron core generates a magnetic force on the moving iron core parallel to the depth direction of the circuit breaker, so that the moving iron core can move along the depth direction of the circuit breaker. In another possible implementation, the angle is less than 90 degrees and greater than 0 degrees. The magnetic force generated by the electromagnetic field generated by the static iron core on the moving iron core has a component force parallel to the depth direction of the circuit breaker, so that the moving iron core can move along the depth direction of the circuit breaker.

[0013] In one possible implementation, the movable iron core assembly may further include an insulating rod, one end of which is fixedly connected to the movable iron core and the other end of which is fixed relative to the latch assembly. When the movable iron core moves along the depth direction of the circuit breaker, the insulating rod moves with the movable iron core and drives the latch assembly. The movable iron core is connected to the latch assembly via the insulating rod, thereby electrically isolating the backup protector from the operating mechanism and enabling remote control of the backup protector's operating mechanism along the depth direction of the circuit breaker.

[0014] In one possible implementation, the housing may include a cover, a base, and a bottom plate arranged in sequence along the height direction of the circuit breaker. The static contact and the static iron core are located on a side of the base close to the cover, and the static contact is fixedly connected to the base. The static iron core is fixedly connected to the static contact. The moving iron core and the insulating rod are located on a side of the base close to the bottom plate, and the moving iron core is electrically isolated from the static contact. The base is provided with a guide groove, which extends along the depth direction of the circuit breaker. The moving iron core is partially accommodated in the guide groove and can slide along the guide groove. The moving iron core is slidably connected to the base and can be electrically isolated from the static contact through the base.

[0015] In one possible implementation, the insulating rod is provided with a strip-shaped opening. The strip-shaped opening extends in the depth direction of the circuit breaker, and a reset spring is provided in the strip-shaped opening. A reset stop is provided on the side surface of the base close to the bottom plate, and the reset stop extends into the strip-shaped opening and is located at the end of the strip-shaped opening away from the operating mechanism. One end of the reset spring is relatively fixed to the end of the strip-shaped opening close to the operating mechanism, and the other end is relatively fixed to the reset stop. The reset spring is used to reset the moving iron core assembly to the initial position, and to maintain a set distance between the moving iron core and the static iron core when the moving iron core assembly is in the initial position. Specifically, when the moving iron core assembly is in the initial position, the magnetic force generated by the static iron core on the moving iron core is equal to the elastic force of the reset spring, so that the moving iron core assembly remains in the initial position. When the magnetic force generated by the static iron core on the moving iron core is greater than the elastic force of the reset spring, the magnetic force can cause the moving iron core assembly to move from the initial position along the depth direction of the circuit breaker. When the magnetic force generated by the static iron core on the movable iron core is less than the elastic force of the reset spring, the elastic force can move the movable iron core assembly along the depth direction of the circuit breaker until the movable iron core assembly is reset to the initial position.

[0016] In one possible implementation, the base and bottom plate are each provided with an arcuate groove extending along the depth of the circuit breaker. The arcuate groove of the base and the arcuate groove of the bottom plate are arranged opposite each other, forming a space for accommodating the return spring. Therefore, as the movable iron core moves along the depth of the circuit breaker, the return spring can be compressed or stretched along the arcuate groove, thereby guiding the return spring and preventing it from getting stuck.

[0017] In one possible implementation, the static iron core may be a U-shaped static iron core, which is fixedly connected to the side of the static contact away from the base. The opening of the U-shaped static iron core is arranged toward the bottom plate, and both ends of the opening of the U-shaped static iron core extend into the guide groove. The moving iron core may be a U-shaped moving iron core. The opening of the U-shaped moving iron core is arranged toward the cover body, and both ends of the opening of the U-shaped moving iron core extend into the guide groove. In this technical solution, the static iron core and the moving iron core are respectively arranged on both sides of the static contact along the height direction of the circuit breaker, and partially extend into the guide groove. Therefore, at least in the guide groove, the static iron core has a portion that is arranged opposite to the moving iron core in the depth direction of the circuit breaker, so that the magnetic force applied to the moving iron core has a component force along the depth direction of the circuit breaker, which facilitates the movement of the moving iron core along the depth direction of the circuit breaker.

[0018] To prevent the insulating rod from shifting along the width of the circuit breaker during movement, the base may be provided with a limiting structure. In one possible implementation, the insulating rod may be a T-shaped insulating rod comprising an integral mounting portion and a rod portion, wherein the mounting portion is fixedly connected to the moving iron core. The rod portion is located on a side of the mounting portion close to the operating mechanism and extends in the depth direction of the circuit breaker. A strip-shaped opening is provided in the rod portion. Two guide posts are provided on a side surface of the base close to the bottom plate, and the mounting portion is located on a side of the two guide posts away from the operating mechanism. Each of the two guide posts is configured to abut against the mounting portion and the rod portion to limit the displacement of the insulating rod in the depth direction of the circuit breaker.

[0019] To prevent the moving iron core from deflecting along the height of the circuit breaker and getting stuck during movement, the base and bottom plate may each be provided with a retaining structure. In one possible implementation, at least one first rib is provided on a side surface of the base proximal to the bottom plate, and at least one second rib is provided on a side surface of the bottom plate proximal to the base. The at least one first rib and the at least one second rib are disposed opposite each other and extend along the depth of the circuit breaker. The moving iron core is located between the at least one first rib and the at least one second rib. Similarly, to prevent the insulating rod from deflecting along the height of the circuit breaker and getting stuck during movement, the base and bottom plate may each be provided with another retaining structure. At least one third rib is provided on a side surface of the base proximal to the bottom plate, and at least one fourth rib is provided on a side surface of the bottom plate proximal to the base. The at least one third rib and the at least one fourth rib are disposed opposite each other and extend along the width of the circuit breaker. The insulating rod is located between the at least one third rib and the at least one fourth rib.

[0020] In one possible implementation, the latch assembly includes a rotating half-shaft that is rotatable relative to the housing and is in transmission connection with the operating assembly. A slot is provided on the end of the insulating rod proximate the operating mechanism, and a lever is provided on the circumferential surface of the rotating half-shaft, which is secured within the slot. When the movable iron core moves along the depth of the circuit breaker, the insulating rod drives the rotating half-shaft, thereby converting the linear movement of the backup protector into rotation of the rotating half-shaft, thereby driving movement of the operating assembly.

[0021] 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 current-passing assembly. The operating handle is connected to the operating mechanism. The current-passing assembly includes a moving contact and a stationary contact. The moving contact is rotatable relative to the housing, with the stationary contact located on the side of the moving contact away from the operating mechanism along the depth direction of the circuit breaker. The operating handle, at least the portion proximal to the operating mechanism, the operating mechanism, and the moving contact are sequentially arranged within the housing along the depth direction of the circuit breaker. The operating handle is used to control the movement of the moving contact by the operating mechanism, thereby causing the moving contact to contact or separate from the stationary contact. Furthermore, the operating mechanism includes a locking assembly and an operating assembly. The operating assembly is connected to the operating handle and to the moving contact. The locking assembly is used to lock or unlock the movement of the operating assembly. The circuit breaker may also include a backup protector. The backup protector includes a static iron core and a moving iron core assembly. The moving iron core assembly includes a moving iron core. The static iron core and the moving iron core are sequentially arranged along the depth direction of the circuit breaker. The static iron core is fixed relative to the housing, and the moving iron core is slidably connected to the housing. The moving iron core is spaced apart from the stationary iron core, electrically isolating them. A latch assembly is drivingly connected to the moving iron core assembly. When a fault current is detected, the backup protector generates a magnetic force on the moving iron core, causing the moving iron core assembly to move along the depth of the circuit breaker. This controls the latch assembly to move the operating assembly, thereby separating the moving and stationary contacts.

[0022] The above-mentioned circuit breaker has a circuit breaker operating surface for 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 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 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 circuit breakers are installed in a 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.

[0023] In the circuit breaker of the present application, the portion of the operating handle proximal to the operating mechanism, the operating mechanism, and the moving contact are arranged along the depth direction of the circuit breaker. This can be understood as the portion of the operating handle, the operating mechanism, and the moving contact being arranged in layers along the depth direction of the circuit breaker. This reduces the number of components required for the circuit breaker to be arranged along the height direction, thereby reducing the height dimension of the circuit breaker and, in turn, reducing the space occupied by the circuit breaker, thereby increasing the number of circuit breakers that can be arranged within the cabinet. The circuit breaker comprises a first layer (electrical or manual operation layer), a second layer (operation layer), and a third layer (current flow layer). Specifically, when the circuit breaker is arranged, 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. The moving contact can extend along the depth direction of the circuit breaker, thereby reducing its height dimension, which can facilitate minimization of the circuit breaker's height. Furthermore, while miniaturizing the moving contact, the driving force arm for closing the moving contact and the static contact can be increased, thereby reducing the driving force of the operating mechanism and facilitating operational stability of the operating mechanism. In addition, the static iron core and moving iron core assembly of the backup protector are arranged along the depth direction of the circuit breaker, which reduces the size of the backup protector in the height direction of the circuit breaker, further facilitating the minimization of the circuit breaker in the height direction. Furthermore, when a fault current is detected, the static iron core of the backup protector generates an induced electromagnetic field, and the moving iron core assembly can move along the depth direction of the circuit breaker under the magnetic force, thereby controlling the locking assembly to drive the operating assembly to move, thereby separating the moving contact from the static contact. Therefore, in this circuit breaker, the backup protector uses a sliding method along the depth direction of the circuit breaker to control the operating mechanism, which further facilitates the minimization of the circuit breaker in the height direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic diagram of an application scenario of a circuit breaker provided in an embodiment of the present application;

[0025] FIG2 is a schematic diagram of an electric power device provided in an embodiment of the present application;

[0026] FIG3 is a schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0027] FIG4 is another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0028] FIG5 is another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0029] FIG6 is another schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0030] FIG7 is a schematic diagram of a backup protector provided in an embodiment of the present application;

[0031] FIG8 is another schematic diagram of a backup protector provided in an embodiment of the present application;

[0032] FIG9 is another schematic diagram of a backup protector provided in an embodiment of the present application;

[0033] FIG10 is another schematic diagram of a backup protector provided in an embodiment of the present application;

[0034] FIG11 is a schematic structural diagram of a backup protector, a static contact, and a lock assembly provided in an embodiment of the present application;

[0035] FIG12 is a schematic structural diagram of a housing provided in an embodiment of the present application;

[0036] FIG13 is a partial schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0037] FIG14 is a schematic diagram of the base and the static contact in FIG13;

[0038] FIG15 is a schematic diagram of a base provided in an embodiment of the present application;

[0039] FIG16 is a schematic diagram of a base and a moving iron core assembly provided in an embodiment of the present application;

[0040] FIG17 is a schematic diagram of a moving iron core assembly provided in an embodiment of the present application;

[0041] FIG18 is a schematic diagram of a base and a moving iron core assembly provided in an embodiment of the present application;

[0042] FIG19 is a schematic diagram of a backup protector and a static contact provided in an embodiment of the present application;

[0043] FIG20 is another schematic diagram of a backup protector and a static contact provided in an embodiment of the present application;

[0044] FIG21 is a schematic diagram of a moving iron core assembly provided in an embodiment of the present application;

[0045] FIG22 is a schematic diagram of a base plate provided in an embodiment of the present application;

[0046] FIG23 is another partial schematic diagram of the circuit breaker provided in an embodiment of the present application.

[0047] Reference numerals: 10 - power supply and distribution system 11 - power module 20 - power equipment 21 - cabinet 210 - user operation panel 30 - circuit breaker 31 - housing 32 - operating handle 33 - operating mechanism 34 - current flow assembly 35 - arc extinguishing chamber 36 - backup protector 37 - arc extinguishing module 311 - cover 312 - base 313 - bottom plate 331 - operating assembly 332 - locking assembly 341 - moving contact 342 - static contact 343 - first copper busbar 344 - second copper busbar 345 - wire 361 - static iron core 362 - Moving iron core assembly 3121 - Guide groove 3122 - Reset stop 3123 - First arc-shaped groove 3124 - Guide column 3125 - First rib 3126 - Third rib 3131 - Second arc-shaped groove 3132 - Second rib 3133 - Fourth rib 3321 - Rotating half shaft 3322 - Deflector lever 3621 - Moving iron core 3622 - Insulating rod 3623 - Strip opening 3624 - Reset spring 36221 - Mounting portion 36222 - Rod 36223 - Slot DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0049] In order to facilitate understanding of the circuit breaker and power equipment provided in the embodiment of the present application, the application scenario thereof is 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 a data center to connect, carry, and disconnect the current between the power supply network and the data center. Figure 1 is a schematic diagram of an application scenario of the circuit breaker provided in the embodiment of the present application. As shown in Figure 1, the power supply and distribution system 10 may include a power module 11 (as shown in Figure 1 by a plurality of UPSs connected in parallel and in series) and a plurality of circuit breakers. Taking the power supply and distribution system 10 as an example, three circuits are provided, namely a first circuit C1, a second circuit C2, and a third circuit C3. Each circuit is equipped with a corresponding circuit breaker. 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 is equipped with a fourth circuit breaker K4.

[0050] When the circuit between the power grid (or power source) and the data center needs to be connected, the first and second circuit breakers K1, K2, can be switched to the closed state. When the circuit between the power grid and the data center needs to be disconnected, either the first or second circuit breaker K1, K2, can be switched to the open state. In this way, the power on and off state of the data center is controlled by controlling the closed and open states of the circuit breakers. When the data center's electrical equipment requires repair or maintenance, the first and second circuit breakers K1, K2, can be switched to the open state, and the third or fourth circuit breaker K3, K4, can be switched to the closed state to facilitate repair and maintenance of the electrical equipment.

[0051] 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 required for normal operation to the power equipment. When the power equipment needs to be inspected or maintained, the staff can switch the circuit breaker to the open state to facilitate the inspection, maintenance, etc. of the power equipment.

[0052] The above-mentioned power supply and distribution system 10 may specifically include multiple power equipment. Figure 2 is a schematic diagram of the power equipment provided in an embodiment of the present application. As shown in Figure 2, each power equipment 20 includes a cabinet 21, and multiple power modules (Q1, ...., Qn) and multiple circuit breakers (K1, ...., Km) located in the cabinet 21. Among them, the side of the cabinet 21 facing the staff is the user operation surface 210. In this application, taking the state of the cabinet 21 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.

[0053] In existing power equipment, the backup protector of the circuit breaker includes a static iron core, a moving iron core, a trip rod and a current-passing assembly, wherein the trip rod is transmission-connected to the moving iron core, and the current-passing assembly is electrically connected to the static iron core. When a fault current is detected, the static iron core generates an electromagnetic field and magnetically attracts the moving iron core, causing the moving iron core to rotate, thereby driving the trip rod to rotate, and then pushing the operating mechanism to complete the tripping protection. However, since the rotation path of the moving iron core is increased, the height dimension of the circuit breaker will increase, and the miniaturization of the circuit breaker cannot be achieved; and the additional provision of a current-passing assembly electrically connected to the static iron core has a high manufacturing cost. Therefore, the present application provides a circuit breaker and power equipment to adjust the size of the backup protector in the height direction of the circuit breaker, which is conducive to the miniaturization of the circuit breaker, thereby changing the space occupied by the circuit breaker in the cabinet, thereby increasing the number of circuit breakers that can be arranged in the cabinet, and improving the safety of the circuit breaker.

[0054] 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 limit the present application. As used in the specification and claims of this application, the singular expressions "a," "an," "said," "above," "the," and "this" are intended to include expressions such as "one or more," unless the context clearly indicates otherwise.

[0055] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0056] Figure 3 is a schematic diagram of a circuit breaker provided in an embodiment of the present application, and Figure 4 is another schematic diagram of a circuit breaker provided in an embodiment of the present application, wherein Figure 4 shows a cross-sectional view of the circuit breaker shown in Figure 3 along the AA direction. As shown in Figures 3 and 4, the circuit breaker 30 includes a housing 31, an operating handle 32, an operating mechanism 33, and a flow assembly 34. It may further include an arc extinguishing chamber 35. Specifically, the operating handle 32 is connected to the operating mechanism 33. The flow assembly 34 includes a moving contact 341 and a stationary contact 342, and the moving contact 341 is rotatable relative to the housing 31. In one embodiment, the end of the operating handle 32 remote from the operating mechanism 33 can extend out of the housing 31, allowing a worker to push the operating handle 32 to close and open the circuit breaker. In another embodiment, the housing 31 is provided with a knob to manually open and close the circuit breaker 30. Specifically, the end of the operating handle 32 remote from the operating mechanism 33 is connected to the knob. When a worker manually operates the knob, they turn the knob, which in turn pushes the operating handle 32 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 is in communication with the remote controller to electrically open and close the circuit breaker 30. When a worker operates the circuit breaker 30 electrically, they send a closing or opening command to the remote controller, which controls the electric operating device to push the operating handle 32. In this embodiment, the worker can issue commands from close proximity to the circuit breaker 30 or remotely via a communication device. Furthermore, at least the portion of the operating handle 32 proximal to the operating mechanism 33, the operating mechanism 33, the moving contact 341, and the arc extinguishing chamber 35 are sequentially arranged within the housing 31 along the depth direction d of the circuit breaker 30. The stationary contact 342 is located on the side of the moving contact 341 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 move the moving contact 341, thereby causing it to contact or separate from the stationary contact 342. The arc extinguishing chamber 35 is used to extinguish the arc generated when the moving contact 341 and the stationary contact 342 separate. In one embodiment, the stationary 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 341 extends from the stationary contact 342 to the other side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30.

[0057] Continuing with Figure 4, the operating mechanism 33 includes an operating assembly 331 and a latch assembly 332. The operating assembly 331 is connected to the operating handle 32 and to the movable contact 341. The latch assembly 332 is used to lock or unlock the movement of the operating assembly 331. The circuit breaker 30 also includes a backup protector 36, which includes a stationary iron core 361 and a movable iron core assembly 362. The movable iron core assembly 362 includes a movable iron core 3621. The stationary iron core 361 and the movable iron core 3621 are arranged sequentially along the depth direction d of the circuit breaker 30. The stationary iron core 361 is fixed relative to the housing 31, while the movable iron core 3621 is slidably connected to the housing 31. The movable iron core 3621 is spaced apart from the stationary iron core 361, thereby electrically isolating the movable iron core 3621 from the stationary iron core 361. The latch assembly 332 is in driving connection with the movable iron core assembly 362. The backup protector 36 is used to generate an induced electromagnetic field on the static iron core 361 when a fault current is detected, and to generate a magnetic force on the moving iron core 3621, so that the moving iron core assembly 362 can move along the depth direction d of the circuit breaker 30, so as to control the locking assembly 332 to drive the operating assembly 331 to move, thereby separating the moving contact 341 from the static contact 342.

[0058] In this application, the side of the operating handle 32 extending from 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 direction in which the operating handle 32 is pushed 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, operating mechanism 33, current-passing assembly 34, and 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 a worker performs a closing or 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 an opening or closing operation, the operating mechanism 33 can follow the movement of the operating handle 32 to drive the moving contact 341 to separate from or contact the static contact 342. When the moving contact 341 is in contact with the static contact 342, the circuit breaker 30 is in the closed state; when the moving contact 341 is separated from the static contact 342, the circuit breaker 30 is in the open state. In the circuit breaker 30 of the present application, at least the portion of the operating handle 32 close to the operating mechanism 33, the operating mechanism 33, the moving contact 341, and the arc extinguishing chamber 35 are arranged along the depth direction d of the circuit breaker 30, and can be regarded as being arranged in a layered manner, thereby reducing the height h of the circuit breaker 30 and reducing the space occupied by the circuit breaker 30, thereby increasing 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 or manual operation layer), the operating mechanism 33 is located on the second layer (operation layer), a portion of the current-carrying assembly 34 is located on the third layer (current-carrying layer), and the arc-extinguishing chamber 35 is located on the fourth layer (arc-extinguishing layer). The movable contact 341 can extend along the depth direction d of the circuit breaker 30, thereby reducing the size of the movable contact 341 in the height direction h of the circuit breaker 30, which can facilitate minimization of the height direction h of the circuit breaker 30. Furthermore, while miniaturizing the movable contact 341, it can also increase the driving force arm for closing the movable contact 341 and the static contact 342, thereby reducing the driving force of the operating mechanism 33 and facilitating the operational stability of the operating mechanism 33. Furthermore, in the power device 20 of the present application, the static iron core 361 and the movable iron core assembly 362 of the backup protector 36 are arranged along the depth direction d of the circuit breaker 30, thereby reducing the size of the backup protector 36 in the height direction h of the circuit breaker 30, further facilitating minimization of the height direction h of the circuit breaker 30. Furthermore, when a fault current is detected, the static iron core 361 of the backup protector 36 generates an electromagnetic field, causing the movable iron core assembly 362 to move along the depth direction d of the circuit breaker 30 under the magnetic force. This, in turn, controls the latch assembly 332 to drive the operating assembly 331 to move, thereby separating the movable contact 341 from the static contact 342.Therefore, in the circuit breaker 30 , the backup protector 36 controls the operating mechanism 33 in a sliding manner along the depth direction d of the circuit breaker 30 , which can further facilitate minimization of the circuit breaker 30 in the height direction h.

[0059] Please continue to refer to Figure 4. The current-carrying component 34 also includes a first copper bar 343, a second copper bar 344 and a wire 345. The first copper bar 343 and the second copper bar 344 are arranged relatively to each other along the height direction h of the circuit breaker 30, and the first copper bar 343 and the second copper bar 344 extend along the depth direction d of the circuit breaker 30. Among them, the end of the first copper bar 343 close to the operating mechanism 33 is electrically connected to the moving contact 341 through the wire 345, and the static contact 342 is arranged on the second copper bar 344 and electrically connected to the second copper bar 344. Specifically, in one embodiment, the static iron core 361 is fixedly connected to the static contact 342, and the static iron core 362 is electrically connected to the static contact 362. The moving iron core 3621 is electrically isolated from the static contact 342. Figure 5 is another schematic diagram of the circuit breaker provided in an embodiment of the present application. As shown in Figures 4 and 5, in another embodiment, the static iron core 361 is fixedly connected to the second copper bar 344, and when the moving contact 341 and the static contact 342 are in contact, the static iron core 361 is electrically connected to the first copper bar 343 through the second copper bar 344. The moving iron core 3621 is electrically isolated from the second copper bar 344. Figure 6 is another schematic diagram of the circuit breaker provided in an embodiment of the present application. As shown in Figure 6, in another embodiment, the static iron core 361 is fixedly connected to the first copper bar 343, and when the moving contact 341 and the static contact 342 are in contact, the static iron core 361 is electrically connected to the second copper bar 344 through the first copper bar 343. The moving iron core 3621 is electrically isolated from the first copper bar 343. In the above technical solution, the static iron core 362 can directly detect the flow current signal of the flow component 34 without the need to additionally set up a flow component for the backup protector 36, thereby further simplifying the structure of the circuit breaker 30.

[0060] The relative positions of the above-mentioned static iron core 361 and the movable iron core 3621 are not limited. Figure 7 is a schematic diagram of the backup protector provided in an embodiment of the present application, and Figure 8 is another schematic diagram of the backup protector provided in an embodiment of the present application. As shown in Figures 7 and 8, in one embodiment, along the depth direction d of the circuit breaker 30, the movable iron core 3621 can be located on the side of the static iron core 361 close to the operating mechanism 33, and the static iron core 361 generates a magnetic attraction force on the movable iron core 3621, causing the movable iron core assembly 362 to move in a direction away from the operating mechanism 33. Figure 9 is another schematic diagram of the backup protector provided in an embodiment of the present application, and Figure 10 is another schematic diagram of the backup protector provided in an embodiment of the present application. As shown in Figures 9 and 10, in another embodiment, along the depth direction d of the circuit breaker 30, the movable iron core 3621 can be located on the side of the static iron core 361 away from the operating mechanism 33, and the static iron core 361 generates a magnetic attraction force on the movable iron core 3621, causing the movable iron core assembly 362 to move in a direction toward the operating mechanism 33. In the above embodiment, the backup protector 36 drives the lock assembly 332 to move by moving the movable iron core assembly 362 in a direction away from or toward the operating mechanism 33 .

[0061] In the backup protector 36, the static iron core 361 has a first magnetic surface, and the movable iron core 3621 has a second magnetic surface. The first magnetic surface is opposite to and parallel to the second magnetic surface. Specifically, the first magnetic surface and the second magnetic surface are arranged at an angle to the depth direction d of the circuit breaker 30, that is, the first magnetic surface and the second magnetic surface are not parallel to the depth direction d of the circuit breaker 30. As shown in Figures 7 and 9, in one embodiment, the above angle can be greater than 0 degrees and less than 90 degrees. Specifically, the magnetic force generated by the electromagnetic field generated by the static iron core 361 on the movable iron core 3621 has a component parallel to the depth direction d of the circuit breaker 30, allowing the movable iron core 3621 to move along the depth direction d of the circuit breaker 30. As shown in Figures 8 and 10, in another embodiment, the above angle can be equal to 90 degrees, that is, the first magnetic surface and the second magnetic surface are respectively perpendicular to the depth direction d of the circuit breaker 30. Specifically, the electromagnetic field generated by the static iron core 361 generates a magnetic force on the movable iron core 3621 parallel to the depth direction d of the circuit breaker 30 , so that the movable iron core 3621 can move along the depth direction d of the circuit breaker 30 .

[0062] Figure 11 is a structural schematic diagram of the backup protector, static contact and lock assembly provided in an embodiment of the present application. As shown in Figure 11, the static iron core 361 is fixedly connected to the static contact 342, and the movable iron core 3621 can slide relative to the static contact 342. The movable iron core assembly 362 may also include an insulating rod 3622. One end of the insulating rod 3622 is fixedly connected to the movable iron core 3621, and the other end is relatively fixed to the lock assembly 332. When the movable iron core 3621 moves along the depth direction d of the circuit breaker 30, the insulating rod 3622 moves with the movable iron core 3621 and drives the lock assembly 332 to move. The movable iron core 3621 is transmission-connected to the lock assembly 332 through the insulating rod 3622, which can achieve electrical isolation between the backup protector 36 and the operating mechanism 33, and in the depth direction d of the circuit breaker 30, the backup protector 36 can remotely control the operating mechanism 33.

[0063] Figure 12 is a schematic diagram of the structure of a housing provided in an embodiment of the present application. As shown in Figure 12, in one embodiment, the housing 31 may include a cover 311, a base 312, and a bottom plate 313, which are arranged in sequence along the height direction h of the circuit breaker 30. The cover 311, base 312, and bottom plate 313 can be sequentially snapped together. Figure 13 is a partial schematic diagram of a circuit breaker provided in an embodiment of the present application, and Figure 14 is a schematic diagram of the base and static contact in Figure 13. As shown in Figures 13 and 14, the static contact 342 and the static iron core 361 are located on the side of the base 312 near the cover 311, and the static contact 342 is fixedly connected to the base 312. The static iron core 361 is fixedly connected to the static contact 342. The moving iron core 3621 and the insulating rod 3622 are located on the side of the base 312 near the bottom plate 313, and the moving iron core 3621 is electrically isolated from the static contact 342. Figure 15 is a schematic diagram of a base provided in an embodiment of the present application, and Figure 16 is a schematic diagram of a base and movable iron core assembly provided in an embodiment of the present application, wherein Figures 15 and 16 show the side of the base facing the base plate. As shown in Figures 15 and 16, the base 312 is provided with a guide groove 3121, which extends along the depth direction d of the circuit breaker 30. The movable iron core 3621 is partially accommodated in the guide groove 3121 and can slide along the guide groove 3121. The movable iron core 3621 is slidably connected to the base 312 and can be electrically isolated from the static contact 342 through the base 312.

[0064] Figure 17 is a schematic diagram of a movable iron core assembly according to an embodiment of the present application, and Figure 18 is a schematic diagram of a base and movable iron core assembly according to an embodiment of the present application. As shown in Figures 17 and 18, the insulating rod 3622 is provided with a strip-shaped opening 3623. The strip-shaped opening 3623 extends along the depth direction d of the circuit breaker 30, and a return spring 3624 is disposed within the strip-shaped opening 3623. A return stop 3122 is provided on one side of the base 312 near the bottom plate 313. The return stop 3122 extends into the strip-shaped opening 3623 and is located at the end of the strip-shaped opening 3623 facing away from the operating mechanism 33. One end of the return spring 3624 is fixed relative to the end of the strip-shaped opening 3623 near the operating mechanism 33, and the other end is fixed relative to the return stop 3122. As shown in Figure 7, during normal operation of the circuit breaker 30, the movable iron core 3621 is in its initial position. At this time, the return spring 3624 applies a force to the movable iron core 3621 toward the operating mechanism 33, and the stationary iron core 361 generates a magnetic attraction force on the movable iron core 3621 away from the operating mechanism 33. The force of the return spring 3624 is equal in magnitude and opposite in direction to the magnetic attraction force of the stationary iron core 361. This maintains a set distance between the movable iron core 3621 and the stationary iron core 361, achieving electrical and physical isolation. When the backup protector 36 detects a fault current, the magnetic attraction force exerted by the stationary iron core 361 on the movable iron core 3621 increases instantaneously and becomes greater than the magnetic attraction force, causing the movable iron core 3621 to move away from the operating mechanism 33 under the influence of the magnetic attraction force. This controls the latch assembly 332 to drive the operating assembly 331 to move, causing the movable contact 341 to separate from the stationary contact 342. After the movable contact 341 is separated from the stationary contact 342, the movable iron core assembly 362 moves toward the operating mechanism 33 under the force of the return spring 3624, so that the movable iron core assembly 362 is restored to its initial position. In the embodiment of the present application, in addition to the return spring 3624, the strip-shaped opening 3623 can also be provided with a spring or other elastic element to achieve reset.

[0065] As shown in FIG14 , a first arcuate groove 3123 is provided on one side of the base 312 facing the bottom plate 313, and a second arcuate groove 3131 is provided on one side of the bottom plate 313 facing the base 312. The first arcuate groove 3123 and the second arcuate groove 3131 extend along the depth direction d of the circuit breaker 30. The first arcuate groove 3123 of the base 312 and the second arcuate groove 3131 of the bottom plate 313 are arranged opposite each other and form a space for accommodating the return spring 3624. Therefore, when the movable iron core 3621 moves along the depth direction d of the circuit breaker 30, the return spring 3624 can be compressed or stretched along the first arcuate groove 3123 and the second arcuate groove 3131, thereby guiding the return spring 3624 and preventing it from getting stuck.

[0066] Figure 19 is a schematic diagram of a backup protector and a static contact provided in an embodiment of the present application, and Figure 20 is another schematic diagram of a backup protector and a static contact provided in an embodiment of the present application. As shown in Figures 19 and 20, the static iron core 361 can be a U-shaped static iron core, fixedly connected to the side of the static contact 342 away from the base 312. The opening of the U-shaped static iron core is arranged toward the bottom plate 313, and the two ends of the opening of the U-shaped static iron core extend into the guide groove 3121. The movable iron core 3621 can be a U-shaped movable iron core. The opening of the U-shaped movable iron core is arranged toward the cover 311, and the two ends of the opening of the U-shaped movable iron core extend into the guide groove 3121. In this embodiment, the static iron core 361 and the movable iron core 3621 are respectively arranged on either side of the static contact 342 along the height direction h of the circuit breaker 30, and partially extend into the guide groove 3121. Therefore, at least in the guide groove 3121, the static iron core 361 has a part that is arranged opposite to the moving iron core 3621 in the depth direction d of the circuit breaker 30, so that the magnetic force applied to the moving iron core 3621 has a component force along the depth direction d of the circuit breaker 30, thereby facilitating the movement of the moving iron core 3621 along the depth direction d of the circuit breaker 30.

[0067] To prevent the insulating rod 3622 from deflecting along the width direction w of the circuit breaker 30 during movement, the base 312 may be provided with a limiting structure. FIG21 is a schematic diagram of a movable iron core assembly provided in an embodiment of the present application. As shown in FIG21 , in one embodiment, the insulating rod 3622 may be a T-shaped insulating rod comprising an integral mounting portion 36221 and a rod portion 36222, wherein the mounting portion 36221 is fixedly connected to the movable iron core 3621. The rod portion 36222 is located on the side of the mounting portion 36221 close to the operating mechanism 33 and extends along the depth direction d of the circuit breaker 30. A strip-shaped opening 3623 is provided in the rod portion 36222. As shown in Figure 16, two guide columns 3124 are provided on the side surface of the base 312 close to the bottom plate 313, and the mounting portion 36221 is located on the side of the two guide columns 3124 away from the operating mechanism 33. Each of the two guide columns 3124 is used to abut against the mounting portion 36221 and the rod portion 36222 to limit the displacement of the insulating rod 3622 along the depth direction d of the circuit breaker 30.

[0068] To prevent the movable iron core 3621 from deflecting along the height direction h of the circuit breaker 30 and becoming stuck during movement, the base 312 and the bottom plate 313 may each be provided with a limit structure. Figure 22 is a schematic diagram of a bottom plate provided in an embodiment of the present application. As shown in Figures 16 and 22, in one embodiment, at least one first rib 3125 is provided on a side surface of the base 312 proximate to the bottom plate 313, and at least one second rib 3132 is provided on a side surface of the bottom plate 313 proximate to the base 312. The at least one first rib 3125 and the at least one second rib 3132 are disposed opposite each other and extend along the depth direction d of the circuit breaker 30. The movable iron core 3621 is positioned between the at least one first rib 3125 and the at least one second rib 3132. Similarly, to prevent the insulating rod 3622 from deflecting and becoming stuck along the height direction h of the circuit breaker 30 during movement, the base 312 and bottom plate 313 may each be provided with another retaining structure. At least one third rib 3126 is provided on a side surface of the base 312 proximate to the bottom plate 313, and at least one fourth rib 3133 is provided on a side surface of the bottom plate 313 proximate to the base 312. The at least one third rib 3126 and the at least one fourth rib 3133 are disposed opposite each other and extend along the width direction w of the circuit breaker 30. The insulating rod 3622 is positioned between the at least one third rib 3126 and the at least one fourth rib 3133.

[0069] FIG23 is another partial schematic diagram of a circuit breaker provided in an embodiment of the present application. As shown in FIG21 and FIG23 , in one embodiment, the latch assembly 332 includes a rotating half-shaft 3321 that is rotatable relative to the housing 31 and is in transmission connection with the operating assembly 331. A slot 36223 is provided on the end of the insulating rod 3622 proximal to the operating mechanism 33. A lever 3322 is provided on the circumferential surface of the rotating half-shaft 3321 and is secured within the slot 36223. When the movable iron core 3621 moves along the depth direction d of the circuit breaker 30, the insulating rod 3622 drives the rotating half-shaft 3321 to rotate, thereby converting the linear movement of the backup protector 36 into rotation of the rotating half-shaft 3321, thereby driving the movement of the operating assembly 331.

[0070] As shown in Figures 4, 5, and 6, in one embodiment, the circuit breaker 30 further includes an arc extinguishing module 37, which 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 operating mechanism 33 along the depth direction d of the circuit breaker 30, that is, the arc extinguishing module 37 is located in the fifth layer (the arc extinguishing layer). An arc ejection port is provided between the arc extinguishing chamber 35 and the arc extinguishing module 37, which is used to connect the arc extinguishing chamber 35 and the arc extinguishing module 37. The power equipment 20 also includes a circuit board located within the cabinet 21. The circuit board and the multiple circuit breakers 30 are arranged in sequence along the depth direction D of the cabinet 21, and the circuit board is positioned near the arc extinguishing module 37. The arc extinguishing module 37 can absorb the charged ions ejected from the arc extinguishing chamber 35, ensuring that the gas ejected from the circuit breaker 30 through the arc extinguishing module 37 is completely arc-free, thus avoiding adverse effects on the circuit boards of the power equipment 20.

[0071] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection 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 and a static contact, the moving contact being rotatable relative to the housing, the static contact being located on a side of the moving contact away from the operating mechanism 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 are sequentially disposed within the housing 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 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 moving iron core assembly, the moving iron core assembly including a moving iron core, the static iron core and the moving iron core being arranged in sequence along the depth direction of the circuit breaker; the static iron core being relatively fixed to the housing, the moving iron core being slidably connected to the housing and spaced apart from the static iron core; The locking assembly is in transmission connection with the moving iron core assembly; the backup protector is used to generate a magnetic force on the moving iron core by the static iron core when a fault current is detected, so that the moving iron core assembly moves along the depth direction of the circuit breaker, so as to control the locking assembly to drive the operating assembly to move, thereby separating the moving contact from the static contact.

2. The electric power equipment according to claim 1, characterized in that The current-passing 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 each other in the height direction of the circuit breaker and 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 a wire, and the static contact is arranged on and electrically connected to the second copper bar; The static iron core is fixedly connected to the static contact, and the moving iron core is electrically isolated from the static contact; or, the static iron core is fixedly connected to the first copper bar and electrically connected to the second copper bar through the first copper bar, and the moving iron core is electrically isolated from the first copper bar; or, the static iron core is fixedly connected to the second copper bar and electrically connected to the first copper bar through the second copper bar, and the moving iron core is electrically isolated from the second copper bar.

3. The power equipment according to claim 1 or 2, characterized in that: The moving iron core is located on a side of the static iron core close to the operating mechanism; the static iron core generates a magnetic attraction to the moving iron core, causing the moving iron core assembly to move in a direction away from the operating mechanism; or, The moving iron core is located on a side of the static iron core away from the operating mechanism; the static iron core generates a magnetic attraction force on the moving iron core, so that the moving iron core assembly moves in a direction toward the operating mechanism.

4. The electric power equipment according to claim 3, characterized in that The static iron core has a first magnetic surface, and the movable iron core has a second magnetic surface. The first magnetic surface and the second magnetic surface are arranged opposite to and parallel to each other, and the first magnetic surface and the second magnetic surface are respectively arranged at an angle to the depth direction of the circuit breaker.

5. The electric power equipment according to any one of claims 1 to 4, characterized in that: The movable iron core assembly also includes an insulating rod, one end of which is fixedly connected to the movable iron core, and the other end is relatively fixed to the locking assembly; when the movable iron core moves along the depth direction of the circuit breaker, the insulating rod moves with the movable iron core and drives the locking assembly to move.

6. The electric power equipment according to claim 5, characterized in that The housing includes a cover, a base, and a bottom plate arranged in sequence along the height direction of the circuit breaker; the static contact and the static iron core are located on a side of the base close to the cover, the static contact is fixedly connected to the base, and the static iron core is fixedly connected to the static contact; the movable iron core and the insulating rod are located on a side of the base close to the bottom plate, and the movable iron core is electrically isolated from the static contact; The base is provided with a guide groove, which extends along the depth direction of the circuit breaker. The movable iron core is partially accommodated in the guide groove and can slide along the guide groove.

7. The electric power equipment according to claim 6, characterized in that The insulating rod is provided with a strip-shaped opening, which extends along the depth direction of the circuit breaker, and a reset spring is provided in the strip-shaped opening; a reset stop is provided on the side surface of the base close to the bottom plate, and the reset stop extends into the strip-shaped opening and is located at the end of the strip-shaped opening away from the operating mechanism; one end of the reset spring is relatively fixed to the end of the strip-shaped opening close to the operating mechanism, and the other end is relatively fixed to the reset stop; the reset spring is used to reset the moving iron core assembly to the initial position, and is used to keep the moving iron core and the static iron core at a set distance when the moving iron core assembly is in the initial position.

8. The electric power equipment according to claim 7, characterized in that The base and the bottom plate are respectively provided with an arc-shaped groove, and the arc-shaped groove extends along the depth direction of the circuit breaker; the arc-shaped groove of the base and the arc-shaped groove of the bottom plate are arranged opposite to each other and form a space for accommodating the reset spring.

9. The electric power equipment according to any one of claims 6 to 8, characterized in that: The static iron core is a U-shaped static iron core, which is fixedly connected to a side of the static contact away from the base, with an opening of the U-shaped static iron core disposed toward the bottom plate, and both ends of the opening of the U-shaped static iron core extending into the guide groove; The movable iron core is a U-shaped movable iron core, and the opening of the U-shaped movable iron core is arranged toward the cover body, and both ends of the opening of the U-shaped movable iron core extend into the guide groove.

10. The electric power equipment according to any one of claims 6 to 9, characterized in that: The insulating rod is a T-shaped insulating rod, comprising an integral mounting portion and a rod portion, wherein the mounting portion is fixedly connected to the movable iron core, and the rod portion is located on a side of the mounting portion close to the operating mechanism and extends along the depth direction of the circuit breaker; the strip-shaped opening is provided on the rod portion; Two guide columns are provided on a side surface of the base close to the bottom plate, and the mounting portion is located on a side of the two guide columns away from the operating mechanism. Each of the two guide columns is used to abut against the mounting portion and the rod portion to limit the displacement of the insulating rod along the depth direction of the circuit breaker.

11. The electric power equipment according to any one of claims 6 to 10, characterized in that: At least one first rib is provided on a side surface of the base close to the bottom plate, and at least one second rib is provided on a side surface of the bottom plate close to the base, wherein the at least one first rib and the at least one second rib are arranged opposite to each other and extend in a depth direction of the circuit breaker; the movable iron core is located between the at least one first rib and the at least one second rib; At least one third rib is provided on a side surface of the base close to the bottom plate, and at least one fourth rib is provided on a side surface of the bottom plate close to the base. The at least one third rib and the at least one fourth rib are arranged opposite to each other and extend along the width direction of the circuit breaker; the insulating rod is located between the at least one third rib and the at least one fourth rib.

12. The electric power equipment according to any one of claims 1 to 11, characterized in that: The lock assembly includes a rotating half-shaft, which can rotate relative to the housing and is in transmission connection with the operating assembly; a slot is provided at one end of the insulating rod close to the operating mechanism, and a shift rod is provided on the circumferential surface of the rotating half-shaft, which is fixed in the slot; when the moving iron core moves along the depth direction of the circuit breaker, the insulating rod drives the rotating half-shaft to rotate, thereby driving the operating assembly to move.

13. 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 movable contact and a stationary contact, the movable contact being rotatable relative to the housing, and the stationary contact being located on a side of the movable contact away from the operating mechanism 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 movable contact are sequentially disposed within the housing 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 that the movable contact contacts or separates from the stationary contact; 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 moving iron core assembly, the moving iron core assembly including a moving iron core, the static iron core and the moving iron core being arranged in sequence along the depth direction of the circuit breaker; the static iron core being relatively fixed to the housing, the moving iron core being slidably connected to the housing and spaced apart from the static iron core; The locking assembly is in transmission connection with the moving iron core assembly; the backup protector is used to generate a magnetic force on the moving iron core by the static iron core when a fault current is detected, so that the moving iron core assembly moves along the depth direction of the circuit breaker, so as to control the locking assembly to drive the operating assembly to move, thereby separating the moving contact from the static contact.

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