CN222600882U - Circuit breaker and power equipment - Google Patents

Abstract

The present application provides a circuit breaker and an electric power device. The circuit breaker includes a housing. The housing includes a front cover and a rear cover assembly sequentially arranged 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 assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker. 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 the 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. The housing of the short-circuit breaker can be assembled in two different directions to improve the single-direction stacking of the housing, which is beneficial to the flexible assembly of the components inside the circuit breaker.

Description

Circuit breaker and power equipment

Technical Field

The application relates to the technical field of power equipment, in particular to a circuit breaker and power equipment.

Background

With the gradual application of artificial intelligence (ARTIFICIAL INTELLIGENCE, AI) technology, 5.5G, autopilot, etc. technology to people's daily lives and works, the demand for computing power has also increased greatly. Data centers are a key area of computing support, requiring ultra-high capacity, high densification. Uninterruptible power supplies (uninterruptible power supply, UPS) are further miniaturized as an indispensable core unit in modern data centers, under the lead of capacity upgrades, high density trends.

In a power supply and distribution system of a data center, it is generally necessary to use circuit breakers to achieve distribution of electric energy. The circuit breaker is used as a key device in a power supply and distribution system, and has a certain protection function besides the on-off control function of a circuit. Specifically, a mechanical switch may be provided in the circuit breaker, and a worker may perform switching of the on or off state of the circuit breaker by operating the mechanical switch, thereby achieving the on or off of the circuit. In addition, after the circuit generates faults such as overload and short circuit, the circuit breaker can be automatically switched to an open state to break the current in the circuit, thereby realizing the protection function.

The housing of the existing circuit breaker generally includes a multi-layered case, which needs to be assembled in sequence in one direction and fixed using more fasteners when the circuit breaker is assembled. However, in the interior of the circuit breaker, the stacked installation of the multi-layered housing in one direction may cause difficulty in assembling the components due to the complicated positional relationship between the components.

Disclosure of utility model

The application provides a circuit breaker and power equipment, so that the shell structure of the circuit breaker can be assembled in different directions, and the assembly operation of the circuit breaker is simplified.

In a first aspect, the present application provides an electrical device. The power equipment comprises a cabinet, a plurality of circuit breakers and a plurality of power modules, wherein the circuit breakers are 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. Specifically, the circuit breaker includes a housing, an operating handle, an operating mechanism, and a through-flow assembly. Wherein, operating handle is connected with operating device. The through-flow assembly comprises a moving contact assembly and a fixed contact, wherein the moving contact assembly comprises a moving contact capable of rotating relative to the shell, and the fixed contact is positioned on one side, far away from the operating mechanism, of the moving contact assembly along the depth direction of the circuit breaker. The operating handle is used for controlling the operating mechanism to drive the moving contact to move so as to enable the moving contact to contact or separate from the fixed contact. In addition, the housing includes a front cover and a rear cover assembly sequentially disposed in a depth direction of the circuit breaker. The operating handle is at least close to the part of the operating mechanism, the operating mechanism and the moving contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is close to the front cover. The front cover is provided with an opening hole, the end of the operating handle away from the operating mechanism passes through the opening and protrudes out of the housing. The rear cover assembly comprises a first shell and a second shell which are sequentially arranged and connected along the height direction of the circuit breaker, and at least a part of the operating mechanism, which is close to the moving contact assembly, the moving contact assembly and the fixed contact are positioned between the first shell and the second shell.

The circuit breaker is provided with a circuit breaker operation surface, and is used for operators to perform operations such as closing operation and opening operation, checking the working state of the circuit breaker and the like. In the plane of the breaker operating face, the dimension of the breaker along the pushing direction of the operating handle is the height, and the dimension of the breaker perpendicular to the height direction is the width. The dimension of the circuit breaker in the direction perpendicular to the operating face of the circuit breaker is the depth. The circuit breaker can be applied to power supply and distribution systems, and can be particularly installed in a cabinet. Similarly, the cabinet has a user operation surface for a worker to perform control operations, installation and removal, or maintenance operations. The breaker operating face of the breaker faces in the same direction as the user operating face. Taking a state that the cabinet is placed on the ground as an example, in a plane where the user operation surface is located, a dimension of the cabinet parallel to the ground is a width, and a dimension of the cabinet perpendicular to the ground is a height. The dimension of the cabinet perpendicular to the user operating face is depth. When a plurality of the circuit breakers are installed in the cabinet, the circuit breakers are placed in parallel along the width direction of the cabinet, wherein the circuit breaker operating surfaces of the circuit breakers face the same direction as the user operating surface of the cabinet, and the height direction of each circuit breaker faces the width direction of the cabinet, the width direction of each circuit breaker faces the height direction of the cabinet, and the depth direction of each circuit breaker faces the depth direction of the cabinet, that is, each circuit breaker is placed in the cabinet transversely.

In the power equipment, the part, the operating mechanism and the moving contact assembly, which are close to the operating mechanism, of the operating handle of the circuit breaker are arranged along the depth direction of the circuit breaker, and the part, the operating mechanism and the moving contact assembly of the operating handle are arranged along the depth direction of the circuit breaker in a layered mode, so that the layout of parts of the circuit breaker along the height direction can be reduced, the height dimension of the circuit breaker is reduced, the occupied space of the circuit breaker is further reduced, and the number of the circuit breakers in a cabinet can be increased. Wherein the circuit breaker comprises a first layer (electrically operated or manually operated layer), a second layer (operating layer) and a third layer (through-flow layer). When the circuit breaker is specifically arranged, the operating handle is located on the first layer, the operating mechanism is located on the second layer, and the through-flow component is located on the third layer. In addition, the front cover and the rear cover assembly of the shell can be assembled along the depth direction of the circuit breaker, and the first shell and the second shell of the rear cover assembly can be assembled along the height direction of the circuit breaker, so that the shell with the open and short circuit can be assembled along two different directions, the stacking of the shell in a single direction is improved, and the flexible assembly of all components inside the circuit breaker is facilitated.

In one possible implementation, the back cover assembly may further include a first insulating housing and a second insulating housing. The first insulating shell is connected to one side of the first shell, which is far away from the second shell, and the second insulating shell is connected to one side of the second shell, which is far away from the first shell. That is, the first insulating housing, the first housing, the second housing, and the second insulating housing are sequentially disposed in the height direction of the circuit breaker. The circuit breaker further comprises an arc extinguishing chamber, and the arc extinguishing chamber is located on one side, far away from the operating mechanism, of the through-flow component along the depth direction of the circuit breaker. The arc extinguishing chamber is used for eliminating the arc generated when the moving contact is separated from the fixed contact. The through-flow assembly further comprises a wire, a first copper bar and a second copper bar. The first copper bar and the second copper bar are oppositely arranged along the height direction of the circuit breaker, and extend to two sides of the arc extinguishing chamber along the depth direction of the circuit breaker. One end of the first copper bar, which is close to the operating mechanism, is electrically connected with the movable contact through a wire. The fixed contact is arranged on the second copper bar and is electrically connected with the second copper bar. Along the depth direction of circuit breaker, first copper bar and second copper bar are located the both sides of explosion chamber. Specifically, the first copper bar may be located between the first insulating housing and the first housing, or the first copper bar may be located between the second housing and the second insulating housing. The second copper bar is located between the first housing and the second housing. In this technical solution, the through-flow assembly can be assembled along the height direction of the circuit breaker. The first copper bar and the second copper bar have larger spacing, so that the electric gap is larger. And the first copper bar and the second copper bar are close to the insulating shell of the circuit breaker, and the heat dissipation is good.

The circuit breaker may further comprise a backup protector. The backup protector comprises a static iron core and a movable iron core. The operating mechanism comprises a lock catch assembly and an operating assembly, the operating assembly is connected with the operating handle, the operating assembly is connected with the moving contact, and the lock catch assembly is used for locking or unlocking the movement of the operating assembly. The backup protector is used for generating magnetic acting force on the movable iron core by the static iron core when fault current is detected, so that the movable iron core moves along the depth direction of the circuit breaker to control the lock catch assembly to drive the operation assembly to move, and therefore the movable contact is separated from the static contact. When the backup protector is specifically set, the backup protector may be set close to the second copper bar. In one possible implementation, the stationary contact is mounted to the second housing. The static iron core is arranged on the static contact, and the movable iron core is arranged between the second shell and the second insulating shell. In another possible implementation, the stationary contact is mounted to the first housing. The static iron core is arranged on the second copper bar, and the movable iron core is arranged between the first shell and the first insulating shell. In this technical scheme, the backup protector can be spacing through two-layer casing to move the iron core and remove along the degree of depth direction of circuit breaker between two-layer casing, and need not additionally set up other bearing structure or guide structure, thereby can reduce the size of backup protector along the direction of height of circuit breaker.

In another possible implementation, the back cover assembly may further include a first insulating housing and a second insulating housing. The first insulating shell is connected to one side, far away from the first shell, of the second shell, and the second insulating shell is connected to one side, far away from the second shell, of the first insulating shell. That is, the first housing, the second housing, the first insulating housing, and the second insulating housing are sequentially disposed in the height direction of the circuit breaker. The circuit breaker further comprises an arc extinguishing chamber, and the arc extinguishing chamber is located on one side, far away from the operating mechanism, of the through-flow component along the depth direction of the circuit breaker. The arc extinguishing chamber is used for eliminating the arc generated when the moving contact is separated from the fixed contact. The through-flow assembly further comprises a wire, a first copper bar and a second copper bar. The first copper bar and the second copper bar are oppositely arranged along the height direction of the circuit breaker and are positioned on the same side of the arc extinguishing chamber, and the first copper bar and the second copper bar extend along the depth direction of the circuit breaker. One end of the first copper bar, which is close to the operating mechanism, is electrically connected with the moving contact through a wire, and the fixed 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.

The circuit breaker may further comprise a backup protector. The backup protector comprises a static iron core and a movable iron core. The operating mechanism comprises a lock catch assembly and an operating assembly, the operating assembly is connected with the operating handle, the operating assembly is connected with the moving contact, and the lock catch assembly is used for locking or unlocking the movement of the operating assembly. The backup protector is used for generating magnetic acting force on the movable iron core by the static iron core when fault current is detected, so that the movable iron core moves along the depth direction of the circuit breaker to control the lock catch assembly to drive the operation assembly to move, and therefore the movable contact is separated from the static contact. When the backup protector is specifically arranged, the static iron core is arranged on the first copper bar, and the movable iron core is arranged between the first insulating shell and the second insulating shell. In this technical scheme, the backup protector can be spacing through two-layer casing to move the iron core and remove along the degree of depth direction of circuit breaker between two-layer casing, and need not additionally set up other bearing structure or guide structure, thereby can reduce the size of backup protector along the direction of height of circuit breaker.

In one possible implementation, the back cover assembly may further include a middle case. The middle case is located between the front cover and the first case in a depth direction of the circuit breaker. Along the depth direction of the breaker, one side of the middle shell is connected with the front cover, and the other side is connected with the first shell and the second shell. The operating handle is located within the middle housing at least proximate to a portion of the operating mechanism and at least proximate to a portion of the operating mechanism. Thus, the middle shell may be used to support the operating mechanism, thereby reducing the strength requirements of the first and second shells. And, the middle shell can realize the electrical interval between operating device and the moving contact subassembly from the structure with the back lid subassembly.

In one possible implementation, the end of the first housing close to the front cover is provided with a first semicircular accommodating cavity, and the end of the second housing close to the front cover is provided with a second semicircular accommodating cavity. The first semicircular accommodating chamber and the second semicircular accommodating chamber are disposed opposite to each other in a height direction of the circuit breaker, and together form a circular accommodating chamber. The movable contact assembly comprises a rotary shell, the rotary shell is provided with a semicircular surface which faces the fixed contact, and the inner surface of the circular accommodating cavity is matched with the semicircular surface in a shape. The rotary shell is limited in the circular accommodating cavity and can rotate in the circular accommodating cavity. In this way, the rotating housing is able to rotate within the circular receiving cavity.

In one possible implementation, the end of the first housing remote from the front cover is provided with a first receiving cavity, the first housing having a first projection extending towards the second housing. The first protrusion is located between the first receiving cavity and the first semicircular receiving cavity and spaces the first receiving cavity and the first semicircular receiving cavity. Correspondingly, one end of the second shell far away from the front cover is provided with a second accommodating cavity, and the second shell is provided with a second protruding part extending towards the first shell. The second protrusion is located between the second receiving cavity and the second semi-circular receiving cavity and spaces the second receiving cavity and the second semi-circular receiving cavity. The first protruding portion and the second protruding portion are disposed opposite to each other in a height direction of the circuit breaker. The first accommodating chamber and the second accommodating chamber are oppositely arranged along the height direction of the circuit breaker, and jointly form an accommodating chamber for accommodating the static contact. In this way, during the rotation of the rotating housing, the accommodating cavity is always isolated from the circular accommodating cavity by the rotating housing, so that the electrical isolation of the components in the two cavities is realized.

In one possible implementation, the end of the first copper bar remote from the operating mechanism is provided with a first joint. One end of the second copper bar, which is far away from the operating mechanism, is provided with a second connector. The housing further includes a terminal cover connected to one end of the rear cover assembly away from the front cover, that is, the front cover, the rear cover assembly and the terminal cover are sequentially disposed along a depth direction of the circuit breaker. The first connector and the second connector are respectively positioned in the terminal cover. Thus, the front cover and the terminal cover can be installed from the two sides of the rear cover assembly along the depth direction of the circuit breaker, so that the whole installation mode of the circuit breaker is simpler and more flexible.

The circuit breaker further comprises an arc extinction module. The arc extinction module is used for purifying gas sprayed out of the arc extinction chamber. The arc extinction module is located one side that the moving contact subassembly was kept away from to the explosion chamber along the depth direction of circuit breaker, and the arc extinction module is close to the part of explosion chamber and is located back lid subassembly, and the arc extinction module is kept away from the part of explosion chamber and is located the terminal lid.

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 through-flow assembly. Specifically, the operating handle is connected with the operating mechanism. The through-flow assembly comprises a moving contact assembly and a fixed contact, wherein the moving contact assembly comprises a moving contact capable of rotating relative to the shell, and the fixed contact is positioned on one side, far away from the operating mechanism, of the moving contact assembly along the depth direction of the circuit breaker. The operating handle is used for controlling the operating mechanism to drive the moving contact to move so as to enable the moving contact to contact or separate from the fixed contact. In addition, the housing includes a front cover and a rear cover assembly sequentially disposed in a depth direction of the circuit breaker. The operating handle is at least close to the part of the operating mechanism, the operating mechanism and the moving contact assembly are sequentially arranged in the rear cover assembly along the depth direction of the circuit breaker, and the operating handle is close to the front cover. The front cover is provided with an opening hole, the end of the operating handle away from the operating mechanism passes through the opening and protrudes out of the housing. The rear cover assembly comprises a first shell and a second shell which are sequentially arranged and connected along the height direction of the circuit breaker, and at least a part of the operating mechanism, which is close to the moving contact assembly, the moving contact assembly and the fixed contact are positioned between the first shell and the second shell.

The circuit breaker is provided with a circuit breaker operation surface, and is used for operators to perform operations such as closing operation and opening operation, checking the working state of the circuit breaker and the like. In the plane of the breaker operating face, the dimension of the breaker along the pushing direction of the operating handle is the height, and the dimension of the breaker perpendicular to the height direction is the width. The dimension of the circuit breaker in the direction perpendicular to the operating face of the circuit breaker is the depth. The circuit breaker can be applied to power supply and distribution systems, and can be particularly installed in a cabinet. In the power equipment, the part, the operating mechanism and the moving contact assembly, which are close to the operating mechanism, of the operating handle of the circuit breaker are arranged along the depth direction of the circuit breaker, and the part, the operating mechanism and the moving contact assembly of the operating handle are arranged along the depth direction of the circuit breaker in a layered mode, so that the layout of parts of the circuit breaker along the height direction can be reduced, the height dimension of the circuit breaker is reduced, the occupied space of the circuit breaker is further reduced, and the number of the circuit breakers in a cabinet can be increased. Wherein the circuit breaker comprises a first layer (electrically operated or manually operated layer), a second layer (operating layer) and a third layer (through-flow layer). When the circuit breaker is specifically arranged, the operating handle is located on the first layer, the operating mechanism is located on the second layer, and the through-flow component is located on the third layer. In addition, the front cover and the rear cover assembly of the shell can be assembled along the depth direction of the circuit breaker, and the first shell and the second shell of the rear cover assembly can be assembled along the height direction of the circuit breaker, so that the shell with the open and short circuit can be assembled along two different directions, the stacking of the shell in a single direction is improved, and the flexible assembly of all components inside the circuit breaker is facilitated.

Drawings

Fig. 1 is a schematic diagram of an application scenario of a circuit breaker according to an embodiment of the present application;

Fig. 2 is a schematic diagram of an electrical device according to an embodiment of the present application;

fig. 3 is a schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 4 is an exploded view of the circuit breaker of fig. 3;

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

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

Fig. 7 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 8 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 9 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

Fig. 10 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 11 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 12 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 13 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

Fig. 14 is an exploded view of the circuit breaker of fig. 13;

fig. 15 is a cross-sectional view of the circuit breaker of fig. 13 taken along the direction B-B;

FIG. 16 is another schematic view of the first housing and the second housing according to the embodiment of the present application;

fig. 17 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

Fig. 18 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 19 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 20 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 21 is another schematic diagram of a circuit breaker according to an embodiment of the present application;

fig. 22 is another schematic diagram of a circuit breaker according to an embodiment of the present application.

Reference numerals:

10-power supply and distribution system

11-Power supply module

20-Electric power equipment

21-Cabinet

210-User operation surface

30-Circuit breaker

31-Outer shell

32-Operating handle

33-Operating mechanism

34-Pass flow assembly

35-Arc-extinguishing chamber

36-Backup protector

37-Arc extinction module

38-Mutual inductor

39-Controller

310-Circuit breaker operating face

311-Front cover

312-Rear cover assembly

313-Terminal cover

331-Latch assembly

332-Operating Assembly

341-Moving contact assembly

342-Static contact

343-Wire

344-First copper bar

345-Second copper bar

346-First joint

347-Second joint

3411 Moving contact

3412-Rotating housing

3121-First housing

3122-Second housing

3123-First insulating housing

3124-Second insulating housing

3125 Middle shell

31211-First semi-circular receiving chamber

31212 First receiving chamber

31213 First protrusion

31214 Installation cavity

31221-Second semi-circular receiving chamber

31222-Second receiving chamber

31223-Second protrusion

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings.

In order to facilitate understanding of the circuit breaker and the power equipment provided by the embodiment of the application, application scenarios thereof are described below. The circuit breaker and the power equipment provided by the embodiment of the application can be widely applied to various power supply and distribution systems. In one example provided by the application, the circuit breaker can be applied to a power supply and distribution system of a data center and used for switching on, carrying and breaking current between a power supply network and the data center. Fig. 1 is a schematic diagram of an application scenario of a circuit breaker according to an embodiment of the present application. As shown in fig. 1, a power supply and distribution system 10 may include a power module 11 (shown as a power module 11 of a plurality of UPS connected in parallel and in series as shown in fig. 1) and a plurality of circuit breakers. Three circuits, for example, a first circuit C1, a second circuit C2, and a third circuit C3 are provided in the power supply and distribution system 10. Each circuit is correspondingly provided with a circuit breaker, wherein the first circuit C1 is connected with the power supply module 11, the input end of the power supply module 11 is provided with the first circuit breaker K1, the output end of the power supply module 11 is provided with the second circuit breaker K2, the second circuit C2 is connected with the bypass module, one end of the bypass module is provided with the third circuit breaker K3, the other end of the bypass module is connected with the second circuit breaker K2, the third circuit C3 is a standby circuit, and the fourth circuit breaker K4 is arranged.

When the circuit between the power supply network (or the power supply) and the data center is required to be connected, the first circuit breaker K1 and the second circuit breaker K2 can be switched to a closing state, and when the circuit between the power supply network and the data center is required to be disconnected, the first circuit breaker K1 or the second circuit breaker K2 can be switched to a breaking state. Thus, the on-off state of the data center is controlled by controlling the on-state and the off-state of the circuit breaker. When the electric equipment of the data center needs to be overhauled and maintained, the first breaker K1 can be switched to a switching-off state, and the third breaker K3 or the fourth breaker K4 can be switched to a switching-on state, so that the electric equipment can be overhauled, maintained and other works.

In addition, the circuit breaker of the application can be applied to the power supply and distribution system 10 of the enterprise electric equipment or the public electric equipment and is used for switching on, carrying and breaking the current between the power supply network and the enterprise electric equipment or the public electric equipment. For example, when the electric equipment (such as the 4G base station, the 5G base station, etc.) needs to work normally, the working personnel can switch the circuit breaker into a closing state, so that the power supply network can provide the electric energy required by the normal work for the electric equipment. When the electric equipment needs to be overhauled and maintained, a worker can switch the breaker into a breaking state so as to conveniently overhaul, maintain and the like the electric equipment.

The power supply and distribution system 10 may include a plurality of electrical devices. Fig. 2 is a schematic diagram of an electrical device according to an embodiment of the present application. As shown in fig. 2, each power device 20 includes a cabinet 21, and a plurality of power modules (Q1, qn) and a plurality of circuit breakers (K1, km) located within the cabinet 21. The side of the cabinet 21 facing the staff member is a user operation surface 210. In the present application, taking a state in which the cabinet 21 is placed on the ground as an example, the dimension of the user operation surface 210 parallel to the ground is a width, the dimension of the user operation surface 210 perpendicular to the ground is a height, and the dimension of the cabinet 21 perpendicular to the user operation surface 210 is a depth. The power modules are stacked in sequence along the height direction H of the cabinet 21, and the circuit breakers are placed on one side of the power modules in sequence along the width direction W of the cabinet 21. The power module is used for performing power conversion on the voltage from the power grid so as to output the adaptive voltage to the load equipment. Specifically, the power module may be an AC/AC module or an AC/DC module.

In the existing power equipment, the case of the circuit breaker is of a multi-layer structure and is installed in a stacked manner in one direction. However, this type of installation is relatively single and inconvenient for the installation of the internal components of the circuit breaker. In view of this, the present application provides a circuit breaker and an electric power apparatus such that a case structure of the circuit breaker can be assembled in different directions, thereby simplifying an assembling operation of the circuit breaker.

It is noted that the terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of the application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Fig. 3 is a schematic diagram of a circuit breaker according to an embodiment of the present application, and fig. 4 is an exploded schematic diagram of the circuit breaker in fig. 3. As shown in fig. 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 operation handle 32 is connected to the operation mechanism 33. The through-flow assembly 34 includes a moving contact assembly 341 and a fixed contact 342, the moving contact assembly 341 includes a moving contact 3411 rotatable with respect to the housing 31, and the fixed contact 342 is located on a side of the moving contact assembly 341 away from the operating mechanism 33 in a depth direction of the circuit breaker 30. In one embodiment, an end of the operating handle 32 remote from the operating mechanism 33 may extend out of the housing 31 so that a worker pushes the operating handle 32 to perform a closing operation and a opening operation. In another embodiment, the housing 31 is provided with a knob to manually open and close the circuit breaker 30 by means of the knob. Specifically, the end of the operating handle 32 remote from the operating mechanism 33 is connected to a knob. When the operator performs the knob manual operation, the knob is turned and the operating handle 32 is driven to push in the height direction h of the circuit breaker 30. In another embodiment, the circuit breaker 30 may further include a remote controller and an electrical operating device connected to the operating handle 32, and the electrical operating device is communicatively connected to the remote controller to effect opening and closing of the circuit breaker 30 by electrical operation. When the operator performs an electric operation, a closing command or an opening command is sent to the remote controller, and the remote controller may control the electric operation device to push the operation handle 32, and in this embodiment, the operator may send a command close to the circuit breaker 30 or may send a command remotely through the communication device. Further, at least a portion of the operating handle 32 near the operating mechanism 33, and the moving contact assembly 341 are sequentially disposed in the housing 31 in 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 in the depth direction d of the circuit breaker 30. The operating handle 32 is used for controlling the operating mechanism 33 to drive the moving contact 3411 to move so as to make the moving contact 3411 contact with or separate from the fixed contact 342. Further, the circuit breaker 30 may further include an arc extinguishing chamber 35, and the arc extinguishing chamber 35 is located at a side of the moving contact assembly 341 away from the operating mechanism 33 in the depth direction d of the circuit breaker 30. The arc extinguishing chamber 35 is used for eliminating an arc generated when the moving contact 3411 is separated from the fixed contact 342. In one embodiment, the stationary contact 342 is located at one side of the arc chute 35 in the height direction h of the circuit breaker 30. The moving trace of the moving contact 3411 extends from the stationary contact 342 to the other side of the arc extinguishing chamber 35 in the height direction h of the circuit breaker 30.

In the present application, the side of the operating handle 32 extending out of the housing 31 is a circuit breaker operating surface 310. Taking the circuit breaker operating surface 310 as an example, the dimension of the circuit breaker 30 in the pushing direction of the operating handle 32 is the height, the dimension perpendicular to the height direction h is the width, and the dimension perpendicular to the circuit breaker operating surface 310 is the depth. In other words, the operating handle 32, the operating mechanism 33, the through-current assembly 34, and the arc extinguishing chamber 35 are sequentially disposed in 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 of the circuit breaker 30, the worker pushes the operation handle 32 in 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 drive the moving contact 3411 to separate from or contact with the fixed contact 342. When the moving contact 3411 is in contact with the fixed contact 342, the circuit breaker 30 is in a closing state, and when the moving contact 3411 is separated from the fixed contact 342, the circuit breaker 30 is in a breaking state.

Fig. 5 is a cross-sectional view of the circuit breaker of fig. 3 taken along A-A. As shown in fig. 3, 4 and 5, in the circuit breaker 30 of the present application, the case 31 includes a front cover 311 and a rear cover assembly 312 sequentially disposed in a depth direction d of the circuit breaker 30. At least a portion of the operating handle 32 near the operating mechanism 33, the moving contact assembly 341, and the arc extinguishing chamber 35 are sequentially disposed in the rear cover assembly 312 in the depth direction d of the circuit breaker 30, and the operating handle 32 is disposed near the front cover 311. Accordingly, the operating handle 32, the operating mechanism 33, the moving contact assembly 341, and the arc extinguishing chamber 35 are regarded as being disposed in a layered form, so that the height size of the circuit breaker 30 can be reduced, the occupied space of the circuit breaker 30 can be reduced, and the number of the circuit breakers 30 that can be laid out in the cabinet 21 can be increased. Specifically, the operating handle 32 is located at a first layer (electric or manual layer), the operating mechanism 33 is located at a second layer (operating layer), a part of the through-flow assembly 34 is located at a third layer (through-flow layer), and the arc extinguishing chamber 35 is located at a fourth layer (arc extinguishing layer). Wherein, the moving contact 3411 may extend along the depth direction d of the circuit breaker 30, so that the size of the moving contact 3411 in the height direction h of the circuit breaker 30 is reduced, which may be advantageous for the miniaturization of the circuit breaker 30 in the height direction h. In addition, the moving contact 3411 is miniaturized in size, and the driving force arm for closing the moving contact 3411 and the fixed contact 342 can be made larger, so that the driving force of the operating mechanism 33 can be reduced, and the operating stability of the operating mechanism 33 is facilitated.

The rear cover assembly 312 includes a first housing 3121 and a second housing 3122 that are sequentially disposed and connected along a height direction h of the circuit breaker 30. At least a portion of the operating mechanism 33 near the moving contact assembly 341, the stationary contact 342, and the arc extinguishing chamber 35 are located between the first housing 3121 and the second housing 3122. Accordingly, the front cover 311 and the rear cover assembly 312 of the case 31 may be assembled in the depth direction d of the circuit breaker 30, and the first case 3121 and the second case 3122 of the rear cover assembly 312 may be assembled in 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 may be performed by means of bonding, welding, riveting, clamping or screw coupling, etc., to facilitate the operation. When the housing 31 is assembled, the assembly can be performed along two different directions, so that the problem of unidirectional stacking can be solved, and the flexible assembly of each component inside the circuit breaker 30 is facilitated.

In the above-described embodiment, the first housing 3121 and the second housing 3122 are respectively provided with the accommodation chamber to accommodate at least a portion of the operating mechanism 33 near the moving contact assembly 341, the stationary contact 342, and the arc extinguishing chamber 35, and to support the foregoing components. Fig. 6 is a schematic diagram of the first housing and the second housing according to the embodiment of the application. As shown in fig. 5 and 6, the first housing 3121 is provided with a first semicircular receiving cavity 31211 at an end thereof adjacent to the front cover 311, and the second housing 3122 is provided with a second semicircular receiving cavity 31221 at an end thereof adjacent to the front cover 311. The first and second semi-circular receiving cavities 31211 and 31221 are oppositely disposed in a height direction h of the circuit breaker 30, and together form a circular receiving cavity. The movable contact assembly 341 includes a rotary housing 3412, the rotary housing 3412 having a semicircular surface disposed toward the stationary contact 342, and an inner surface of the circular receiving chamber being in shape-fit with the semicircular surface. The rotary housing 3412 is confined in the circular receiving chamber and is rotatable therein. In this way, the rotary housing 3412 can rotate within the circular receiving cavity.

In addition, the first housing 3121 is provided with a first receiving cavity 31212 at an end thereof remote from the front cover 311, and the first housing 3121 has a first protrusion 31213 extending toward the second housing 3122. The first protrusion 31213 is located between the first accommodating chamber 31212 and the first semicircular accommodating chamber 31211, and spaces the first accommodating chamber 31212 and the first semicircular accommodating chamber 31211. Accordingly, the end of the second housing 3122 remote from the front cover 311 is provided with a second receiving cavity 31222, and the second housing 3122 has a second protrusion 31223 extending toward the first housing 3121. The second protrusion 31223 is located between the second accommodating chamber 31222 and the second semicircular accommodating chamber 31221, and spaces the second accommodating chamber 31222 and the second semicircular accommodating chamber 31221. The first protrusion 31213 and the second protrusion 31223 are disposed opposite to each other in the height direction h of the circuit breaker 30. The first and second accommodating chambers 31212 and 31222 are disposed opposite to each other in the height direction h of the circuit breaker 30, and together form an accommodating chamber for accommodating the arc extinguishing chamber 35 and the stationary contact 342. Thus, during rotation of rotating housing 3412, the receiving cavity is isolated from the circular receiving cavity by rotating housing 3412 at all times, thereby providing electrical isolation of the components within the two cavities.

Fig. 7 is another schematic diagram of a circuit breaker according to an embodiment of the present application. As shown in fig. 7, the rear cover assembly 312 may further include a first insulating housing 3123 and a second insulating housing 3124. The first insulating housing 3123 is provided at a side of the first housing 3121 remote from the second housing 3122, and the first insulating housing 3123 and the first housing 3121 are connected. The second insulating housing 3124 is provided at a side of the second housing 3122 remote from the first housing 3121, and the second insulating housing 3124 and the second housing 3122 are connected. That is, the first insulating housing 3123, the first housing 3121, the second housing 3122, and the second insulating housing 3124 are sequentially disposed along the height direction h of the circuit breaker 30.

With continued reference to fig. 7, the current assembly 34 further includes a conductive line 343, a first copper bar 344, and a second copper bar 345. The first copper bar 344 and the second copper bar 345 are disposed opposite to each other in 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 in the depth direction d of the circuit breaker 30. One end of the first copper bar 344 near the operating mechanism 33 is electrically connected to the moving contact 3411 through a wire 343. The stationary contact 342 is disposed on the second copper bar 345 and the stationary contact 342 is electrically connected to the second copper bar 345. Along the depth direction d of the circuit breaker 30, the first copper bar 344 and the second copper bar 345 are located at both sides of the arc extinguishing chamber 35.

In one embodiment, the first copper bar 344 may be located between the first insulating housing 3123 and the first housing 3121, and the second copper bar 345 is located between the first housing 3121 and the second housing 3122. In other words, the first copper bar 344 is mounted on a side of the first housing 3121 close to the first insulating housing 3123, and the first insulating housing 3123 is covered with the first housing 3121. The second copper bar 345 is installed at a side of the second housing 3122 close to the first housing 3121, and the first housing 3121 is covered with the second housing 3122. Fig. 8 is another schematic diagram of a circuit breaker according to an embodiment of the present application. As shown in fig. 8, in another embodiment, the first copper bar 344 may also be located between the second housing 3122 and the second insulating housing 3124. The second copper bar 345 is located between the first housing 3121 and the second housing 3122. In other words, the first copper bar 344 is mounted on a side of the second housing 3122 close to the second insulating housing 3124, and the second insulating housing 3124 is covered with the second housing 3122. The second copper bar 345 is installed at a side of the second housing 3122 close to the first housing 3121, and the first housing 3121 is covered with the second housing 3122.

In the above embodiment, the through-current assembly 34 may be assembled in the height direction h of the circuit breaker 30. Wherein, the interval between the first copper bar 344 and the second copper bar 345 is larger, a larger electric gap can be realized, thereby improving the safety of the circuit breaker 30. Further, the first copper bar 344 and the second copper bar 345 are disposed close to the insulating case of the circuit breaker 30, respectively, and close to the surface of the circuit breaker 30, so that the heat dissipation of the through-current assembly 34 can be improved.

With continued reference to fig. 7 and 8, the circuit breaker 30 may also include a backup protector 36. The backup protector 36 includes a stationary core 361 and a movable core 362. The operating mechanism 33 includes a latch assembly 331 and an operating assembly 332, the operating assembly 332 is connected to the operating handle 32 and the operating assembly 332 is connected to the moving contact 3411, the latch assembly 331 being used to lock or unlock the movement of the operating assembly 332. The backup protector 36 of the present application is used for generating a magnetic force to the moving iron core 362 by the static iron core 361 when a fault current is detected, so that the moving iron core 362 moves along the depth direction d of the circuit breaker 30 to control the latch assembly 331 to drive the operation assembly 332 to move, thereby separating the moving contact 3411 from the static contact 342. In particular, the backup protector 36 may be disposed proximate to the second copper bar 345. In one embodiment, the stationary contact 342 is mounted to the second housing 3122. The stationary core 361 is mounted to the stationary contact 342, and the movable core 362 is mounted between the second housing 3122 and the second insulating housing 3124. In another embodiment, the stationary contact 342 is mounted to the first housing 3121. The stationary core 361 is mounted to the second copper bar 345, and the movable core 362 is mounted between the first housing 3121 and the first insulating housing 3123. In this embodiment, the backup protector 36 may be limited by a two-layer housing, and the backup protector 36 controls the operating mechanism 33 in a sliding manner along the depth direction d of the circuit breaker 30 without providing additional supporting structures or guiding structures, so that the size of the backup protector 36 along the height direction h of the circuit breaker 30 may be reduced.

Fig. 9 is another schematic diagram of a circuit breaker according to an embodiment of the present application. As shown in fig. 9, in another embodiment, the first insulating housing 3123 is located at a side of the second housing 3122 remote from the first housing 3121, and the first insulating housing 3123 is connected with the second housing 3122. The second insulating housing 3124 is located at a side of the first insulating housing 3123 remote from the second housing 3122, and the second insulating housing 3124 is connected to the first insulating housing 3123. That is, the first housing 3121, the second housing 3122, the first insulating housing 3123, and the second insulating housing 3124 are sequentially disposed 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 disposed opposite to each other in the height direction h of the circuit breaker d, and the first copper bar 344 and the second copper bar 345 are located at the same side of the arc extinguishing chamber 35, and the first copper bar 344 and the second copper bar 345 extend in the depth direction d of the circuit breaker 30. The first copper bar 344 is located between the second housing 3122 and the first insulating housing 3123, and the second copper bar 345 is located between the first housing 3121 and the second housing 3122. In other words, the first copper bar 344 is mounted on the side of the second housing 3122 close to the first insulating housing 3123, and the first insulating housing 3123 is covered with the second housing 3122. The second copper bar 345 is installed at a side of the second housing 3122 close to the first housing 3121, and the first housing 3121 is covered with the second housing 3122.

In the above embodiment, when the backup protector 36 is specifically provided, the stationary core 361 is mounted to the first copper bar 344, and the movable core 362 is mounted between the first insulating housing 3123 and the second insulating housing 3124. In this embodiment, the backup protector 36 may be limited by the two-layered housing, and the movable iron core 362 moves between the two-layered housing along the depth direction d of the circuit breaker 30 without providing additional supporting structures or guiding structures, so that the size of the backup protector 36 along the height direction h of the circuit breaker 30 may be reduced.

In the above embodiment, the first and second insulating housings 3123 and 3124 do not need to support the through-current assembly 34 and the arc extinguishing chamber 35, and the first and second insulating housings 3123 and 3124 may employ an insulating material. Therefore, the materials of the first insulating housing 3123 and the second insulating housing 3124 do not need to have high strength requirements, and the versatility of the materials can be improved to reduce the manufacturing cost of the circuit breaker 30. In another embodiment, the first and second insulating housings 3123 and 3124 may also be used to support the current assembly 34 and the arc chute 35.

Fig. 10 is another schematic diagram of a circuit breaker according to an embodiment of the present application, fig. 11 is another schematic diagram of a circuit breaker according to an embodiment of the present application, and fig. 12 is another schematic diagram of a circuit breaker according to an embodiment of the present application. As shown in fig. 10, 11 and 12, the end of the first copper bar 344 remote from the operating mechanism 33 is provided with a first joint 346. The end of the second copper bar 345 remote from the operating mechanism 33 is provided with a second joint 347. The housing 31 further includes a terminal cover 313, and the terminal cover 313 is connected to an end of the rear cover assembly 312 remote from the front cover 311, that is, the front cover 311, the rear cover assembly 312, and the terminal cover 313 are sequentially disposed in the depth direction d of the circuit breaker 30. The first joint 346 and the second joint 347 are located in the terminal cover 313, and the first joint 346 is fixedly connected with the first copper bar 344, and the second joint 347 is fixedly connected with the second copper bar 345. In this way, the front cover 311 and the terminal cover 313 can be installed from both sides of the rear cover assembly 312 in the depth direction d of the circuit breaker 30, so that the overall installation manner of the circuit breaker 30 is simpler and more flexible.

The circuit breaker 30 also includes an arc suppression module 37. The arc extinction module 37 is used for purifying the gas sprayed from the arc extinction chamber 35. The arc extinguishing module 37 is located on a side of the arc extinguishing chamber 35 remote from the moving contact assembly 341 in the depth direction d of the circuit breaker 30. In one embodiment, the portion of the arc suppression module 37 that is proximate to the arc chute 35 is located within the rear cover assembly 312 and the portion of the arc suppression module 37 that is distal from the arc chute 35 is located within the terminal cover 313. In another embodiment, the arc suppression module 37 is located within the rear cover assembly 312. In this way, the arc extinguishing module 37 and the arc extinguishing chamber 35 are commonly accommodated between the first housing 3121 and the second housing 3122, thereby hermetically connecting the first housing 3121 and the second housing 3122 such that the gas discharged from the rear cover assembly 312 has been filtered of the ions.

Fig. 13 is another schematic diagram of a circuit breaker according to an embodiment of the present application, fig. 14 is an exploded schematic diagram of the circuit breaker in fig. 13, fig. 15 is a cross-sectional view of the circuit breaker in fig. 13 along a direction B-B, and fig. 16 is another schematic diagram of a first housing and a second housing according to an embodiment of the present application. As shown in fig. 13 to 16, the rear cover assembly 312 may further include a middle case 3125. The middle case 3125 is located between the front cover 311 and the first housing 3121 in the depth direction d of the circuit breaker 30. Fig. 17 is another schematic diagram of a circuit breaker according to an embodiment of the present application, fig. 18 is another schematic diagram of a circuit breaker according to an embodiment of the present application, and fig. 19 is another schematic diagram of a circuit breaker according to an embodiment of the present application. As shown in fig. 17, 18 and 19, in the depth direction d of the circuit breaker 30, one side of the middle case 3125 is connected to the front cover 311, and the other side is connected to the first case 3121 and the second case 3122. At least a portion of the operating handle 32 adjacent to the operating mechanism 33, and at least a portion of the operating mechanism 33 adjacent to the operating handle 32 are located within the middle housing 3125. Thus, the middle housing 3125 can be used to support the operating mechanism 33, thereby reducing the strength requirements of the first housing 3121 and the second housing 3122. Also, the middle case 3125 and the rear cover assembly 312 may structurally implement an electrical separation between the operating mechanism 33 and the movable contact assembly 341.

Fig. 20 is another schematic diagram of a circuit breaker according to an embodiment of the present application, fig. 21 is another schematic diagram of a circuit breaker according to an embodiment of the present application, and fig. 22 is another schematic diagram of a circuit breaker according to an embodiment of the present application. As shown in fig. 20, 21 and 22, in one embodiment, the housing 31 includes a front cover 311, a rear cover assembly 312 and a terminal cover 313 connected in sequence in a depth direction d of the circuit breaker 30. The rear cover assembly 312 includes a middle case 3125, and first, second, and second housings 3121, 3122, 3123, and 3124 located at a side of the middle case 3125 remote from the front cover 311, the first, second, and second housings 3121, 3122, 3123, 3124 being disposed along a height direction h of the circuit breaker 30. In this embodiment, the front cover 311 and the terminal cover 313 may be assembled with the rear cover assembly 312 from both sides of the rear cover assembly 312, and the first housing 3121, the second housing 3122, the first insulating housing 3123, and the second insulating housing 3124 of the rear cover assembly 312 may be assembled in the height direction h of the circuit breaker 30 and then assembled with the middle housing 3125 in the depth direction d of the circuit breaker 30. Thus, assembling the housing 31 of the circuit breaker 30 from two different directions facilitates the assembly between the parts of the housing 31 and the assembly between the components (the operating handle 32, the operating mechanism 33, the moving contact assembly 341, the arc extinguishing chamber 35, the backup protector 36 and the arc extinguishing module 37) and the parts of the housing 31 during the assembly of the housing 31.

In one embodiment, the circuit breaker 30 further includes a transformer 38 and a controller 39. The controller 39 is provided on one side of the operating mechanism 33 in the width d direction of the circuit breaker 20. The transformer 38 is electrically connected to a controller 39. The transformer 38 is disposed at one side of the moving contact 3411 along the height h direction of the circuit breaker 30, and may specifically be located at one end of the second copper bar 345 near the operating mechanism 33. The transformer 38 is used to send a fault current signal to the controller 39 through the transformer line when a fault current is detected. Specifically, in one embodiment, either the first housing 3121 or the second housing 3122 may be provided with a mounting cavity 31214 with the transformer 38 located within the mounting cavity 31214. In another embodiment, the first housing 3121 or the second housing 3122 may be provided with a recess, with which the middle housing 3125 forms a mounting cavity 31214 and the transformer 38 is located within the mounting cavity 31214.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims (11)

1. The power equipment is characterized by comprising a cabinet, a plurality of circuit breakers and a plurality of power modules, wherein the circuit breakers and the power modules are positioned in the cabinet, the 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 comprises a shell, an operating handle, an operating mechanism and a through-flow component, wherein the operating handle is connected with the operating mechanism, the through-flow component comprises a moving contact component and a fixed contact, the moving contact component comprises a moving contact capable of rotating relative to the shell, the fixed contact is located at one side, far away from the operating mechanism, of the moving contact component along the depth direction of the circuit breaker, the operating handle is used for controlling the operating mechanism to drive the moving contact to move so as to enable the moving contact to contact or separate from the fixed contact, the shell comprises a front cover and a rear cover component which are sequentially arranged along the depth direction of the circuit breaker, at least a part, close to the operating mechanism, of the operating handle and the moving contact component are sequentially arranged in the rear cover component along the depth direction of the circuit breaker, and the operating handle is close to the front cover;

the front cover is provided with an opening, and one end of the operating handle, which is far away from the operating mechanism, passes through the opening and extends out of the shell;

The rear cover assembly comprises a first shell and a second shell which are sequentially arranged and connected in the height direction of the circuit breaker, and the operating mechanism is at least close to the moving contact assembly, and the moving contact assembly and the static contact are positioned between the first shell and the second shell.

2. The electrical power apparatus of claim 1, wherein the rear cover assembly further comprises a first insulating housing and a second insulating housing, the first insulating housing being connected to a side of the first housing remote from the second housing, the second insulating housing being connected to a side of the second housing remote from the first housing;

the circuit breaker further comprises an arc extinguishing chamber, wherein the arc extinguishing chamber is positioned at one side of the through-flow component, which is far away from the operating mechanism, along the depth direction of the circuit breaker, and is used for eliminating an arc generated when the moving contact is separated from the fixed contact;

The through-flow assembly further comprises a wire, and a first copper bar and a second copper bar which are oppositely arranged along the height direction of the circuit breaker, wherein the first copper bar and the second copper bar extend to two sides of the arc extinguishing chamber along the depth direction of the circuit breaker; one end of the first copper bar, which is close to the operating mechanism, is electrically connected with the moving contact through the lead, and the fixed 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 first insulating shell and the first shell or between the second shell and the second insulating shell, and the second copper bar is located between the first shell and the second shell.

3. The electrical power apparatus of claim 2, wherein the operating mechanism includes a latch assembly and an operating assembly, the operating assembly being connected to the operating handle and the operating assembly being connected to the moving contact, the latch assembly being for locking or unlocking movement of the operating assembly;

The circuit breaker further comprises a backup protector, wherein the backup protector comprises a static iron core and a movable iron core, the lock catch assembly is in transmission connection with the movable iron core, and the backup protector is used for generating magnetic acting force on the movable iron core when fault current is detected, so that the movable iron core moves along the depth direction of the circuit breaker to control the lock catch assembly to drive the operation assembly to move, and therefore the movable contact is separated from the static contact;

The static contact is arranged on the second shell, the static iron core is arranged on the static contact, and the movable iron core is arranged between the second shell and the second insulating shell, or

The static contact is installed in the first shell, the static iron core is installed in the second copper bar, and the movable iron core is installed between the first shell and the first insulating shell.

4. The electrical power apparatus of claim 1, wherein the rear cover assembly further comprises a first insulating housing and a second insulating housing, the first insulating housing being connected to a side of the second housing remote from the first housing, the second insulating housing being connected to a side of the first insulating housing remote from the second housing;

the circuit breaker further comprises an arc extinguishing chamber, wherein the arc extinguishing chamber is positioned at one side of the through-flow component, which is far away from the operating mechanism, along the depth direction of the circuit breaker, and is used for eliminating an arc generated when the moving contact is separated from the fixed contact;

The through-flow assembly further comprises a wire, a first copper bar and a second copper bar, wherein the first copper bar and the second copper bar are oppositely arranged along the height direction of the circuit breaker and are positioned on the same side of the arc extinguishing chamber, and the first copper bar and the second copper bar extend along the depth direction of the circuit breaker;

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 electrical power apparatus of claim 4, wherein the operating mechanism comprises a latch assembly and an operating assembly, the operating assembly being connected to the operating handle and the operating assembly being connected to the moving contact, the latch assembly being for locking or unlocking movement of the operating assembly;

The circuit breaker further comprises a backup protector, wherein the backup protector comprises a static iron core and a movable iron core, the lock catch assembly is in transmission connection with the movable iron core, and the backup protector is used for generating magnetic acting force on the movable iron core when fault current is detected, so that the movable iron core moves along the depth direction of the circuit breaker to control the lock catch assembly to drive the operation assembly to move, and therefore the movable contact is separated from the static contact;

The static iron core is installed in the first copper bar, and the movable iron core is installed between the first insulating shell and the second insulating shell.

6. The power device according to any one of claims 1 to 5, wherein the rear cover assembly further comprises a middle case located between the front cover and the first case in a depth direction of the circuit breaker, one side of the middle case is connected to the front cover, the other side is connected to the first case and the second case in the depth direction of the circuit breaker, and the operating handle is located in the middle case at least at a portion near the operating mechanism and at least at a portion near the operating handle.

7. The power equipment according to any one of claims 1 to 5, wherein a first semicircular accommodating chamber is provided at an end of the first housing close to the front cover, a second semicircular accommodating chamber is provided at an end of the second housing close to the front cover, and the first semicircular accommodating chamber and the second semicircular accommodating chamber are disposed opposite to each other in a height direction of the circuit breaker and together form a circular accommodating chamber;

The movable contact assembly comprises a rotary shell, the rotary shell is provided with a semicircular surface which faces the fixed contact, the semicircular surface is matched with the inner surface of the circular accommodating cavity in a shape, and the rotary shell is limited in the circular accommodating cavity and can rotate in the circular accommodating cavity.

8. The power device of claim 7, wherein an end of the first housing remote from the front cover is provided with a first receiving cavity, the first housing having a first projection extending toward the second housing, the first projection being located between and spacing the first receiving cavity and the first semicircular receiving cavity;

The second shell is provided with a second accommodating cavity at one end far away from the front cover, the second shell is provided with a second protruding part extending towards the first shell, the second protruding part 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 protruding part and the second protruding part are oppositely arranged along the height direction of the circuit breaker, and the first accommodating cavity and the second accommodating cavity are oppositely arranged along the height direction of the circuit breaker and jointly form an accommodating cavity for accommodating the static contact.

9. The electrical device of any one of claims 2 to 5, wherein the end of the first copper bar remote from the operating mechanism is provided with a first joint;

The housing further includes a terminal cover connected to an end of the rear cover assembly remote from the front cover, the first and second connectors being located within the terminal cover, respectively.

10. The power equipment according to claim 9, wherein the circuit breaker further comprises an arc extinction module for purifying gas ejected from the arc extinction chamber, the arc extinction module is located on one side of the arc extinction chamber away from the moving contact assembly in a depth direction of the circuit breaker, a portion of the arc extinction module close to the arc extinction chamber is located in the rear cover assembly, and a portion of the arc extinction module away from the arc extinction chamber is located in the terminal cover.

11. A circuit breaker, characterized in that the circuit breaker comprises a housing, an operating handle, an operating mechanism and a through-flow assembly, wherein:

The operating handle is used for controlling the operating mechanism to drive the moving contact to move so as to enable the moving contact to contact or separate from the fixed contact, the shell comprises a front cover and a rear cover component which are sequentially arranged along the depth direction of the circuit breaker, the operating handle at least comprises a part close to the operating mechanism, the operating mechanism and the moving contact component are sequentially arranged in the rear cover component along the depth direction of the circuit breaker, and the operating handle is arranged close to the front cover;

the front cover is provided with an opening, and one end of the operating handle, which is far away from the operating mechanism, passes through the opening and extends out of the shell;

The rear cover assembly comprises a first shell and a second shell which are sequentially arranged and connected in the height direction of the circuit breaker, and the operating mechanism is at least close to the moving contact assembly, and the moving contact assembly and the static contact are positioned between the first shell and the second shell.