Circuit breaker and electrical device

Abstract

Provided in the present application are a circuit breaker and an electrical device. The circuit breaker comprises a housing, an operating handle, an operating mechanism, a moving contact assembly, and a static contact. The moving contact assembly comprises a main shaft and a rotating rod each rotatably connected to the housing. A moving contact is located at the end of the rotating rod away from the operating mechanism. The operating handle can control the operating mechanism to drive the main shaft to rotate, so as to enable the moving contact to come into contact with or separate from the static contact. The main shaft is provided with a boss for driving the rotating rod to rotate, so as to enable the moving contact to separate from the static contact. The main shaft is provided with a shift lever, and the shift lever can turn on or off a first micro switch. When the circuit breaker is in a closed state, the boss and the rotating rod are spaced apart from each other, and the shift lever presses the first micro switch to keep the first micro switch turned on. During opening, the operating mechanism drives the main shaft to rotate to move the shift lever away from the first micro switch, and the first micro switch is turned off before the moving contact separates from the static contact, and switches the transmitted signal, so as to adjust the voltage state of an electrical device in advance, ensuring the stability of the output voltage.

Description

A circuit breaker and a power device

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese Patent Application No. 202421159245.4, filed on May 25, 2024, and entitled "A Circuit Breaker and a Power Device", the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

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

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

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

[0006] The circuit breaker includes a moving contact and a stationary contact. When the circuit breaker is closed, the moving contact contacts the stationary contact, and at the same time, the circuit breaker sends a closing signal to the power supply and distribution system. When the circuit breaker is opened, the moving contact is separated from the stationary contact, and at the same time, the circuit breaker sends an opening signal to the power supply and distribution system. However, at the moment when the circuit breaker is opened or closed, the total voltage of the power supply and distribution system will change instantaneously, which is easy to cause overshoot of the inverter and the load in the system, and is not conducive to the voltage output stability of the system. SUMMARY

[0007] The application provides a circuit breaker and a power device, so that the circuit breaker switches a signal before being disconnected, so that the power device can judge the switching of the on-off state of the circuit breaker in advance, so that the output voltage of the power device can be adjusted in advance, the stability of the output voltage is ensured, and the voltage overshoot phenomenon of the power device is improved.

[0008] In a first aspect, the application provides a circuit breaker. The circuit breaker comprises a housing, an operating handle, an operating mechanism, a moving contact assembly, a stationary contact and a first micro switch. Specifically, the operating handle is connected to the operating mechanism, and at least a part of the operating handle close to the operating mechanism, the operating mechanism, the moving contact assembly, the stationary contact and the first micro switch are located in the housing. The moving contact assembly comprises a main shaft and a rotating rod, and the main shaft and the rotating rod are respectively rotatably connected to the housing. The operating mechanism is in transmission connection with the main shaft. One end of the rotating rod is arranged close to the main shaft, and the other end extends away from the operating mechanism and is provided with a moving contact, which is used for contacting or separating from the stationary contact. The operating handle is used for controlling the operating mechanism to drive the main shaft to rotate, so that the moving contact contacts or separates from the stationary contact. The main shaft is provided with a boss, which is used for driving the rotating rod to rotate, so that the moving contact separates from the stationary contact. The main shaft is also provided with a lever, which is used for turning on or off the first micro switch. When the circuit breaker is in the closed state, the boss is spaced apart from the rotating rod by a certain distance, and the lever presses the first micro switch, so that the first micro switch is turned on. When the circuit breaker is in the process of switching from the closed state to the open state (i.e. when the circuit breaker is in the process of switching from the closed state to the open state), the operating mechanism can drive the main shaft to rotate in a first direction, so that the lever moves away from the first micro switch, and the boss moves towards the rotating rod, so that before the boss contacts the rotating rod, the first micro switch is turned off and is switched from sending a first signal to sending a second signal, and the first signal is different from the second signal.

[0009] In the circuit breaker of the application, during the rotation of the main shaft, the lever gradually moves away from the first micro switch with the main shaft, and the boss moves towards the rotating rod with the main shaft. Before the boss contacts the rotating rod, the first micro switch is turned off and the signal sent can be switched. The main shaft continues to rotate, the boss contacts the rotating rod and starts to push the rotating rod to rotate, so as to drive the moving contact to separate from the stationary contact. That is, the first micro switch is turned off before the moving contact separates from the stationary contact, and the controller of the power device can receive two different signals of the circuit breaker, so as to judge the opening operation of the circuit breaker in advance, so as to control the power supply line of the power device to switch the voltage state in advance, so as to ensure the stability of the output voltage, and improve the voltage overshoot phenomenon of the power device.

[0010] When the first micro switch is specifically arranged, the first micro switch can include a first fixed plate, a first movable contact, a first stationary contact and a first spring. The first fixed plate is fixed relative to the shell, the first movable contact is in sliding connection with the first fixed plate, the first stationary contact and the first spring are respectively located on a side of the first movable contact away from the lever, and the first stationary contact is fixed relative to the first fixed plate. One end of the first spring is fixed relative to the first movable contact, and the other end is fixed relative to the first fixed plate. The lever is used to push the first movable contact, so that the first movable contact slides on the first fixed plate in a direction close to the first stationary contact and contacts the first stationary contact, thereby making the first micro switch conductive. In addition, the lever is also used to separate from the first movable contact, so that the first movable contact slides on the first fixed plate in a direction away from the first stationary contact and separates from the first stationary contact, thereby the first micro switch is turned off. The first micro switch has a simple structure, and the lever pushes the first movable contact in the process of following the rotation of the main shaft, so that the first movable contact contacts the first stationary contact to realize the accurate conduction of the first micro switch, thereby the misoperation can be avoided. In addition, the first spring can push the first movable contact away from the first stationary contact in the process that the lever is away from the first movable contact. And when the lever pushes the first movable contact, the first spring can play a buffering role to reduce the impact force of the first movable contact on the first stationary contact.

[0011] In one possible implementation, the first fixed plate is provided with a first limiting rib near one end of the lever. The first limiting rib is used to limit the position of the first movable contact relative to the first fixed plate after the first micro switch is turned off, thereby limiting the maximum distance between the first movable contact and the first stationary contact.

[0012] In a possible implementation, the circuit breaker can further include a second micro switch, and the lever is further configured to turn on or turn off the second micro switch. When the circuit breaker is in the open state, the boss is in contact with the rotating rod, and the lever presses the second micro switch to turn on the second micro switch. When the circuit breaker is in the closing operation, the operating mechanism drives the main shaft to rotate in the second direction, so that the lever moves away from the second micro switch, and the rotating rod rotates towards the static contact, so that the second micro switch is turned off and switched to send the fourth signal different from the third signal before the moving contact is in contact with the static contact. The second direction is opposite to the first direction. When the circuit breaker is in the closing operation (i.e. during the process of switching the circuit breaker from the open state to the closed state), the operating mechanism drives the main shaft to rotate in the second direction. During the rotation of the main shaft, the lever gradually moves away from the second micro switch, and the moving contact moves towards the static contact. Before the moving contact is in contact with the static contact, the second micro switch is turned off and the signal sent is switched. The main shaft continues to rotate, and the moving contact is in contact with the static contact, so that the circuit breaker is closed. That is, the second micro switch is turned off before the moving contact is in contact with the static contact, and the controller of the power device can receive the third signal and the fourth signal of the circuit breaker, so as to judge the closing operation of the circuit breaker in advance, thereby controlling the line in the power device to switch the voltage state in advance to ensure the stability of the output voltage and improve the voltage overshoot phenomenon of the power device.

[0013] In order to prepare for the next opening operation, in a possible implementation, when the circuit breaker is in the closing operation, after the moving contact is in contact with the static contact, the main shaft continues to rotate in the second direction, so that the boss is separated from the rotating rod and is spaced apart by a set distance.

[0014] The second micro switch can include a second fixed plate, a second movable contact, a second stationary contact and a second spring. The second fixed plate is fixed relative to the housing, the second movable contact is in sliding connection with the second fixed plate, the second stationary contact and the second spring are located on a side of the second movable contact away from the lever, and the second stationary contact is fixed relative to the second fixed plate. One end of the second spring is fixed relative to the second movable contact, and the other end is fixed relative to the second fixed plate. The lever is used to push the second movable contact, so that the second movable contact slides on the second fixed plate in a direction close to the second stationary contact and contacts the second stationary contact, so that the second micro switch is turned on. The lever is also used to separate from the second movable contact, so that the second movable contact slides on the second fixed plate in a direction away from the second stationary contact and separates from the second stationary contact, so that the second micro switch is turned off. The second micro switch has a simple structure, and the lever pushes the second movable contact during rotation of the main shaft, so that the second movable contact contacts the second stationary contact to accurately turn on the second micro switch, thereby avoiding misoperation. In addition, the second spring can push the second movable contact away from the second stationary contact during movement of the lever away from the second movable contact. Moreover, the second spring can act as a buffer when the lever pushes the second movable contact, to reduce the impact force of the second movable contact on the second stationary contact.

[0015] In one possible implementation, the second fixed plate is provided with a second limiting rib at an end close to the lever, and the second limiting rib is used to limit the position of the second movable contact relative to the first fixed plate after the second micro switch is turned off, thereby limiting the maximum distance between the second movable contact and the second stationary contact.

[0016] In the circuit breaker of the present application, the movable contact assembly can further include a third spring. One end of the third spring is connected with the rotating lever, and the other end is connected with the main shaft. The third spring is used to keep the rotating lever in contact with the boss, so as to fix the rotating lever relative to the main shaft.

[0017] In one possible implementation, the first micro switch and the second micro switch are arranged relative to each other along the height direction of the circuit breaker, and the first micro switch and the second micro switch are located between the movable contact assembly and the operating mechanism, and the lever extends between the first micro switch and the second micro switch. That is, during the process of switching the movable contact and the stationary contact from the contact state to the separation state, and from the separation state to the contact state, the lever moves between the first micro switch and the second micro switch.

[0018] The positions of the first micro switch and the second micro switch are specifically arranged, and a baffle is arranged in the shell. The baffle is located between the movable contact assembly and the operating mechanism, and extends along the height direction of the circuit breaker. The baffle is provided with an opening, and the push rod passes through the opening. The first micro switch and the second micro switch are located on the side of the baffle close to the operating mechanism, and are arranged opposite to the two sides of the opening. Therefore, the first micro switch and the second micro switch are arranged by using the space between the operating mechanism and the movable contact assembly, which is beneficial to simplify the structure of the circuit breaker.

[0019] In a second aspect, the application also provides an electric power device. The electric power device comprises a cabinet, a power supply, a controller, a plurality of power modules and a plurality of circuit breakers of the first aspect arranged in the cabinet. The power supply is configured to supply power to the plurality of power modules, the plurality of power modules are arranged in one-to-one correspondence with the plurality of circuit breakers and are electrically connected, and the power supply and the plurality of circuit breakers are electrically connected with the controller. The controller is configured to receive the first signal or the second signal of the circuit breaker, and adjust the voltage of the power supply to the plurality of power modules when the first signal is switched to the second signal. In the application, the circuit breaker can send the first signal or the second signal to the controller, and the controller can judge the tripping operation of the circuit breaker in advance according to the switching between the first signal and the second signal, so as to control the voltage state of the power supply line to the power module in advance to ensure the output voltage stability and improve the voltage overshoot phenomenon of the electric power device.

[0020] In one possible implementation, the circuit breaker can further comprise a second micro switch. The second micro switch is configured to send a third signal or a fourth signal. The controller is configured to receive the third signal or the fourth signal, and adjust the voltage of the power supply to the plurality of power modules when the third signal is switched to the fourth signal. In this way, the controller can judge the closing operation of the circuit breaker in advance according to the switching between the third signal and the fourth signal. The electric power device can realize the pre-closing and pre-tripping operations at the same time. BRIEF DESCRIPTION OF DRAWINGS

[0021] FIG. 1 is a schematic diagram of an application scenario of a circuit breaker provided by an embodiment of the application;

[0022] FIG. 2 is a schematic diagram of an electric power device provided by an embodiment of the application;

[0023] FIG. 3 is a schematic diagram of a circuit breaker provided by an embodiment of the application;

[0024] FIG. 4 is a sectional view of the circuit breaker in FIG. 3 along the A-A direction;

[0025] FIG. 5 is a sectional view of the circuit breaker in FIG. 3 along the A-A direction;

[0026] FIG. 6 is a schematic diagram of a main shaft provided by an embodiment of the application;

[0027] Fig. 7 is another schematic view of the main shaft according to an embodiment of the present application;

[0028] Fig. 8 is a schematic view of the moving contact assembly according to an embodiment of the present application;

[0029] Fig. 9 is another schematic view of the moving contact assembly according to an embodiment of the present application;

[0030] Fig. 10 is an enlarged view of the portion in the dashed line frame in Fig. 5;

[0031] Fig. 11 is a schematic view of the stroke and level of the first micro switch according to an embodiment of the present application;

[0032] Fig. 12 is a sectional view of the circuit breaker along the direction A-A in Fig. 3;

[0033] Fig. 13 is an enlarged view of the portion in the dashed line frame in Fig. 12;

[0034] Fig. 14 is a schematic view of the stroke and level of the second micro switch according to an embodiment of the present application.

[0035] Reference signs: 10 - power supply and distribution system 11 - power supply module 20 - power equipment 21 - cabinet 210 - user operation surface 30 - circuit breaker 31 - housing 32 - operation handle 33 - operation mechanism 34 - through-flow assembly 35 - arc extinguishing chamber 36 - first micro switch 37 - second micro switch 38 - baffle 310 - circuit breaker operation surface 341 - moving contact assembly 342 - stationary contact 361 - first fixed plate 362 - first moving contact 363 - first stationary contact 364 - first spring 371 - second fixed plate 372 - second moving contact 373 - second stationary contact 374 - second spring 381 - opening 3411 - moving contact 3412 - main shaft 3413 - rotating rod 3414 - third spring 3611 - first limiting rib 3711 - second limiting rib 34121 - boss 34122 - lever DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings.

[0037] For the convenience of understanding the circuit breaker and power equipment provided in the embodiments of the present application, the application scenarios thereof are described below. The circuit breaker and power equipment provided in the embodiments of the present application can be widely applied in various power supply and distribution systems. In an example provided in the present application, the circuit breaker can be applied in the power supply and distribution system of a data center, and is used to connect, carry and disconnect the current between the power grid and the data center. FIG. 1 is a schematic diagram of an application scenario of the circuit breaker provided in the embodiments of the present application. As shown in FIG. 1, the power supply and distribution system 10 can include a power supply module 11 (such as the power supply module 11 shown in FIG. 1, which is formed by a plurality of UPSs connected in series) and a plurality of circuit breakers. Taking an example in which three circuits are provided in the power supply and distribution system 10, the three circuits are a first circuit C1, a second circuit C2 and a third circuit C3. The circuit breakers are correspondingly provided in each circuit. The first circuit C1 is connected to the power supply module 11, and the first circuit C1 is provided with a first circuit breaker K1 at the input end of the power supply module 11 and a second circuit breaker K2 at the output end; the second circuit C2 is connected to a bypass module, and the bypass module is provided with a third circuit breaker K3 at one end and connected to the second circuit breaker K2 at the other end; and the third circuit C3 is a standby circuit and is provided with a fourth circuit breaker K4.

[0038] When it is required to connect the circuit between the power grid (or power supply) and the data center, the first circuit breaker K1 and the second circuit breaker K2 can be switched to the closed state; when it is required to disconnect the circuit between the power grid and the data center, the first circuit breaker K1 or the second circuit breaker K2 can be switched to the open state. In this way, the on-off state of the data center is controlled by controlling the closed state and the open state of the circuit breaker. When the power equipment of the data center needs to be overhauled or maintained, the first circuit breaker K1 can be switched to the open state, and the third circuit breaker K3 or the fourth circuit breaker K4 can be switched to the closed state, so as to facilitate the overhauling, maintenance and other work of the power equipment.

[0039] In addition, the circuit breaker of the present application can also be applied in the power supply and distribution system 10 of enterprise power equipment or public power equipment, and is used to connect, carry and disconnect the current between the power grid and the enterprise power equipment or the public power equipment. For example, when the power equipment (such as a 4G base station, a 5G base station, etc.) needs to work normally, the staff can switch the circuit breaker to the closed state, so that the power grid can provide the power required for normal work to the power equipment. When the power equipment needs to be overhauled or maintained, the staff can switch the circuit breaker to the open state, so as to facilitate the overhauling, maintenance and other work of the power equipment.

[0040] The power supply and distribution system 10 can specifically include a plurality of power devices. FIG. 2 is a schematic diagram of a power device according to an embodiment of the present application. As shown in FIG. 2, each power device 20 includes a cabinet 21, and a power supply, a controller, a plurality of power modules (Q1, …, Qn) and a plurality of circuit breakers (K1, …, Km) located in the cabinet 21. The user operation surface 210 of the cabinet 21 is located on the side of the cabinet 21 facing the staff. In the present application, the size of the user operation surface 210 parallel to the ground is the width, the size of the user operation surface 210 perpendicular to the ground is the height, and the size of the cabinet 21 perpendicular to the user operation surface 210 is the depth, in the case that the cabinet 21 is placed on the ground. The plurality of power modules are stacked in the height direction H of the cabinet 21, and the plurality of circuit breakers are placed on one side of the plurality of power modules in the width direction W of the cabinet 21. The power module is used to convert the voltage from the power grid to output an appropriate voltage to the load device. Specifically, the power module can be an AC / AC module or an AC / DC module. The power supply is used to supply power to the plurality of power modules. The plurality of power modules and the plurality of circuit breakers are one-to-one corresponding and electrically connected. The power supply and the plurality of circuit breakers are electrically connected to the controller, respectively.

[0041] The existing circuit breaker sends a signal to the power supply and distribution system at the moment of closing or opening, but at this time the total voltage in the power supply and distribution system has already changed instantaneously, which is easy to cause voltage overshoot of the inverter and the load in the system, and is not conducive to the safety of the system and the stability of the voltage output. In view of this, the present application provides a circuit breaker and a power device, so that the circuit breaker switches the signal sent before the circuit breaker is disconnected, so that the power device can judge the switching of the opening and closing state of the circuit breaker in advance, so as to adjust the output voltage of the power device in advance, ensure the stability of the output voltage, and further improve the voltage overshoot phenomenon of the power device.

[0042] It should be noted that the terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting to the present application. As used in the specification and the appended claims of the present application, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0043] Reference within this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places within specified

[0044] Fig. 3 is a schematic view of a circuit breaker according to an embodiment of the present application, and Fig. 4 is a sectional view of the circuit breaker of Fig. 3 along the direction of A-A. As shown in Figs. 3 and 4, the circuit breaker 30 includes a housing 31, an operating handle 32, an operating mechanism 33, and a through-flow assembly 34. Specifically, the operating handle 32 is connected to the operating mechanism 33. The through-flow assembly 34 includes a moving contact assembly 341 and a stationary contact 342. The moving contact assembly 341 is rotatable relative to the housing 31. The moving contact assembly 341 includes a moving contact 3411. The stationary contact 342 can be disposed on a side of the moving contact assembly 341 away from the operating mechanism 33 along a depth direction of the circuit breaker 30, or the stationary contact 342 can be disposed on a side of the moving contact assembly 341 away from the operating mechanism 33 along a height direction of the circuit breaker 30. In one embodiment, an end of the operating handle 32 away from the operating mechanism 33 can extend out of the housing 31, so that a worker can push the operating handle 32 to perform closing and opening operations. In another embodiment, the housing 31 is provided with a knob, so that the closing and opening of the circuit breaker 30 can be realized by knob operation. Specifically, an end of the operating handle 32 away from the operating mechanism 33 is connected to the knob. When a worker performs knob operation, the knob is rotated and drives the operating handle 32 to be pushed along the height direction h of the circuit breaker 30. In another embodiment, the circuit breaker 30 can further include a remote controller and an electric operating device. The electric operating device is connected to the operating handle 32, and the electric operating device is in communication connection with the remote controller, so that the closing and opening of the circuit breaker 30 can be realized by electric operation. When a worker performs electric operation, a closing instruction or an opening instruction is sent to the remote controller, and the remote controller can control the electric operating device to push the operating handle 32. In this embodiment, the worker can issue the instruction close to the circuit breaker 30, or the worker can issue the instruction remotely through a communication device.

[0045] As shown in FIG. 4, in one embodiment, the operating handle 32, at least the portion of the operating handle 32 close to the operating mechanism 33, the operating mechanism 33 and the movable contact assembly 341 can be arranged in the housing 31 in sequence along the depth direction d of the circuit breaker 30. The operating handle 32 is used to control the operating mechanism 33 to drive the movable contact assembly 341 to move, so as to make the movable contact 3411 contact or separate from the static contact 342. Further, the circuit breaker 30 can further comprise an arc extinguishing chamber 35, which is located on the side of the movable contact assembly 341 away from the operating mechanism 33 along the depth direction d of the circuit breaker 30. The arc extinguishing chamber 35 is used to eliminate the arc generated when the movable contact 3411 separates from the static contact 342. In one embodiment, the static contact 342 is located on one side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30. The movement trajectory of the movable contact 3411 extends from the static contact 342 to the other side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30.

[0046] In the present application, the side of the housing 31 where the operating handle 32 protrudes is the circuit breaker operating surface 310. Taking the circuit breaker operating surface 310 as an example, the dimension of the circuit breaker 30 along the pushing direction of the operating handle 32 is the height, the dimension perpendicular to the height direction h is the width, and the dimension perpendicular to the circuit breaker operating surface 310 is the depth. In other words, the operating handle 32, the operating mechanism 33, the through-flow assembly 34 and the arc extinguishing chamber 35 are arranged in sequence along the depth direction d of the circuit breaker 30. When the circuit breaker 30 is placed in the cabinet 21, in one embodiment, the height direction h of the circuit breaker 30 can be the same as the width direction W of the cabinet 21, the width direction w of the circuit breaker 30 can be the same as the height direction H of the cabinet 21, and the depth direction d of the circuit breaker 30 can be the same as the depth direction D of the cabinet 21. Therefore, when the worker performs the closing operation or the opening operation on the circuit breaker 30, the worker pushes the operating handle 32 along the width direction W of the cabinet 21. When the operating handle 32 is pushed to perform the opening operation or the closing operation, the operating mechanism 33 can move along with the operating handle 32 to drive the movable contact 3411 to separate from or contact the static contact 342. When the movable contact 3411 contacts the static contact 342, the circuit breaker 30 is in the closed state; when the movable contact 3411 separates from the static contact 342, the circuit breaker 30 is in the open state. Of course, in another embodiment, the width direction w of the circuit breaker 30 can be the same as the width direction W of the cabinet 21, the height direction h of the circuit breaker 30 can be the same as the height direction H of the cabinet 21, and the depth direction d of the circuit breaker 30 can be the same as the depth direction D of the cabinet 21, which is not limited in the present application.

[0047] As shown in FIG. 4, when the operating handle 32, the operating mechanism 33, the through-flow assembly 34 and the arc-extinguishing chamber 35 are arranged in sequence along the depth direction d of the circuit breaker 30, the housing 31 can include a front cover 311 and a rear cover assembly 312 arranged in sequence along the depth direction d of the circuit breaker 30. The operating handle 32, at least a portion of the operating mechanism 33, the moving contact assembly 341 and the arc-extinguishing chamber 35 are arranged in sequence along the depth direction d of the circuit breaker 30 in the rear cover assembly 312, and the operating handle 32 is arranged close to the front cover 311. Therefore, the operating handle 32, the operating mechanism 33, the moving contact assembly 341 and the arc-extinguishing chamber 35 are arranged in a layered form, so that the height dimension of the circuit breaker 30 can be reduced, the space occupied by the circuit breaker 30 can be reduced, and the number of circuit breakers 30 that can be arranged in the cabinet 21 can be increased. Specifically, the operating handle 32 is located in the first layer (the electric or manual operation layer), the operating mechanism 33 is located in the second layer (the operation layer), a portion of the through-flow assembly 34 is located in the third layer (the through-flow layer), and the arc-extinguishing chamber 35 is located in the fourth layer (the arc-extinguishing layer). The moving contact 3411 can extend along the depth direction d of the circuit breaker 30, so that the dimension of the moving contact 3411 in the height direction h of the circuit breaker 30 is reduced, which is conducive to the minimization of the circuit breaker 30 in the height direction h. Moreover, while the moving contact 3411 is miniaturized, the driving force arm of the moving contact 3411 and the stationary contact 342 during closing can be increased, so that the driving force of the operating mechanism 33 can be reduced, and the operation stability of the operating mechanism 33 can be improved.

[0048] FIG. 5 is a sectional view of the circuit breaker of FIG. 3 along the A-A direction, wherein FIG. 5 omits the operating handle, the operating mechanism and the arc-extinguishing chamber, and the circuit breaker is in the closed state. As shown in FIG. 5, the moving contact assembly 341 includes a main shaft 3412 and a rotating rod 3413, and the main shaft 3412 and the rotating rod 3413 are respectively rotationally connected with the housing 31. One end of the rotating rod 3413 is arranged close to the main shaft 3412, the rotating rod 3413 extends away from the operating mechanism 33, and the moving contact 3411 is arranged at the end of the rotating rod 3413 away from the operating mechanism 33. The operating mechanism 33 is in transmission connection with the main shaft 3412, and the operating handle 32 is used to control the operating mechanism 33 to drive the main shaft 3412 to rotate, so that the moving contact 3411 is in contact with or separated from the stationary contact 342.

[0049] Fig. 6 is a schematic view of the main shaft according to an embodiment of the present application, and Fig. 7 is another schematic view of the main shaft according to an embodiment of the present application, wherein Fig. 7 shows a sectional view of the main shaft along the direction of B-B in Fig. 6. As shown in Figs. 6 and 7, the main shaft 3412 is provided with a boss 34121, which is used to contact and drive the rotating rod 3413 to rotate, so as to separate the movable contact 3411 from the static contact 342. The circuit breaker 30 further comprises a first micro switch 36, which is electrically connected with the controller. The main shaft 3412 is provided with a lever 34122, which is used to turn on or turn off the first micro switch 36. When the circuit breaker 30 is in the closed state, the boss 34121 is spaced apart from the rotating rod 3413 by a certain distance, and the lever 34122 presses the first micro switch 36, so that the first micro switch 36 is turned on.

[0050] Fig. 8 is a schematic view of the moving contact assembly according to an embodiment of the present application, and Fig. 9 is another schematic view of the moving contact assembly according to an embodiment of the present application, wherein Fig. 9 shows a sectional view of the main shaft along the direction C-C in Fig. 8. As shown in Figs. 8 and 9, when the circuit breaker 30 is in the process of switching from the closed state to the open state (i.e. not yet completely in the open state, but in the process of switching from the closed state to the open state), the operating mechanism 33 drives the main shaft 3412 to rotate in the first direction (e.g. the clockwise direction in Fig. 5), so that the lever 34122 gradually moves away from the first micro switch 36, and the boss 34121 moves towards the rotating rod 3413, so that the first micro switch 36 is switched off and sends a second signal to the controller before the boss 34121 contacts the rotating rod 3413. In this way, during the rotation of the main shaft 3412, the lever 34122 gradually moves away from the first micro switch 36, and the boss 34121 moves towards the rotating rod 3413. And before the boss 34121 contacts the rotating rod 3413, the first micro switch 36 is switched off and the signal sent to the controller is switched. Subsequently, the boss 34121 contacts the rotating rod 3413 and pushes the rotating rod 3413 to rotate, so that the moving contact 3411 is separated from the static contact 342. That is, the first micro switch 36 is switched off before the moving contact 3411 is separated from the static contact 342, and the controller of the power device 20 can receive the first signal and the second signal of the circuit breaker 30, and switch according to the two signals (i.e. when the first signal is switched to the second signal), so as to pre-judge the opening operation of the circuit breaker 30, so as to control the power supply line of the power device 20 to switch the voltage state in advance, so as to ensure the stability of the output voltage, and improve the voltage overshoot phenomenon of the power device 20, and ensure the smoother parallel current sharing control of the power supply system 10. In this embodiment, the first micro switch 36 only sends one signal to the controller, i.e. the first signal or the second signal. When the first signal is switched to the second signal, the controller switches according to the two signals, and adjusts the voltage.

[0051] Figure 10 is a partial enlarged view of the dashed box in Figure 5. As shown in Figure 10, when the first micro switch 36 is specifically arranged, the first micro switch 36 includes a first fixed plate 361, a first movable contact 362, a first stationary contact 363, and a first spring 364. The first fixed plate 361 is fixed relative to the housing 31. The first movable contact 362 is in sliding connection with the first fixed plate 361. The first stationary contact 363 and the first spring 364 are located on a side of the first movable contact 362 away from the lever 34122. The first stationary contact 363 is fixed relative to the first fixed plate 361. One end of the first spring 364 is fixed relative to the first movable contact 362, and the other end of the first spring 364 is fixed relative to the first fixed plate 361. The lever 34122 is used to push the first movable contact 362, so that the first movable contact 362 slides on the first fixed plate 361 in a direction close to the first stationary contact 363 and contacts the first stationary contact 363, so that the first micro switch 36 is turned on. The lever 34122 is also used to separate from the first movable contact 362, so that the first movable contact 362 slides on the first fixed plate 361 in a direction away from the first stationary contact 363 and separates from the first stationary contact 363, so that the first micro switch 36 is turned off. The structure of the first micro switch 36 is simple, the lever 34122 pushes the first movable contact 362 in the process of following the rotation of the main shaft 3412, so that the first movable contact 362 contacts the first stationary contact 363 to realize the first micro switch 36 being turned on, thereby avoiding misoperation. In addition, the first spring 364 can push the first movable contact 362 away from the first stationary contact 363 in the process of the lever 34122 moving away from the first movable contact 362. And when the lever 34122 pushes the first movable contact 362, the first spring 364 can play a buffering role to reduce the impact force of the first movable contact 362 on the first stationary contact 363.

[0052] In one embodiment, the first fixed plate 361 is provided with a first limiting rib 3611 close to one end of the lever 34122. The first limiting rib 3611 is used to limit the position of the first movable contact 362 relative to the first fixed plate after the first micro switch 36 is turned off, thereby defining the maximum distance between the first movable contact 362 and the first stationary contact 363, and making the lever 34122 start to move away from the first movable contact 362 when the main shaft 3412 starts to rotate in the first direction. In other words, when the first movable contact 362 slides towards the first limiting rib 3611 and contacts the first limiting rib 3611, the first movable contact 362 is disconnected from the first stationary contact 363. And in the process of closing the circuit breaker 30, the lever 34122 is close to the first movable contact 362 and pushes the first movable contact 362 to slide towards the first stationary contact 363, so that the first movable contact 362 and the first stationary contact 363 are in contact after closing, making the first micro switch 36 turned on.

[0053] Figure 11 is a schematic diagram of the stroke and level of the first micro switch according to an embodiment of the present application. As shown in Figure 11, when the main shaft 3412 is at stroke 1, the circuit breaker 30 is in the closed state, and the moving contact 3411 and the stationary contact 342 are in contact. When the main shaft 3412 starts to rotate in the first direction, at stroke 2, the first moving contact 362 and the first stationary contact 363 are separated, at this time, the level signal of the first micro switch 36 changes and is switched from the first level signal to the second level signal. Here, the first signal corresponds to the first level signal of the first micro switch 36, and the second signal corresponds to the second level signal of the first micro switch 36. The main shaft 3412 continues to rotate from stroke 2 to stroke 3, and the first moving contact 362 moves away from the first stationary contact 363, at this time, the level signal of the first micro switch 36 does not change. At point A, the first moving contact 362 is at the maximum stroke, that is, the distance between the first moving contact 362 and the first stationary contact 363 is the largest, and then the first moving contact 362 stops moving. At stroke 3, the boss 34121 contacts the rotating rod 3413. When the main shaft 3412 continues to rotate from stroke 3, the boss 34121 starts to rotate the rotating rod 3413.

[0054] Fig. 12 is a sectional view of the circuit breaker of Fig. 3 along the direction of A-A, and Fig. 13 is an enlarged view of the dashed box in Fig. 12, wherein Fig. 12 omits the operating handle, the operating mechanism and the arc extinguishing chamber, and the circuit breaker is in the open state. As shown in Figs. 12 and 13, the circuit breaker 30 can further include a second micro switch 37 disposed near the lever 34 122. The lever 34 122 is also used to turn on or off the second micro switch 37. When the circuit breaker 30 is in the open state, the boss 34 121 is in contact with the rotating lever 34 13, and the lever 34 122 presses the second micro switch 37 to turn on the second micro switch 37. When the circuit breaker 30 performs the closing operation, the operating mechanism 33 drives the main shaft 34 12 to rotate in the second direction (the second direction is opposite to the first direction), so that the lever 34 122 gradually moves away from the second micro switch 37, and the rotating lever 34 13 rotates towards the static contact 34 2, so that the second micro switch 37 is turned off and switched to send the fourth signal to the controller before the moving contact 34 11 contacts the static contact 34 2. When the circuit breaker 30 performs the closing operation, i.e. in the process of switching from the open state to the closed state (i.e. the dynamic process of switching from the open state to the closed state, which has not yet completely reached the closed state, but is in the process of switching from the open state to the closed state), the operating mechanism 33 drives the main shaft 34 12 to rotate in the second direction. During the rotation of the main shaft 34 12, the lever 34 122 gradually moves away from the second micro switch 37, while the moving contact 34 11 moves towards the static contact 34 2. Before the moving contact 34 11 contacts the static contact 34 2, the second micro switch 37 is turned off and the signal sent to the controller is switched. Subsequently, the moving contact 34 11 contacts the static contact 34 2, and the circuit breaker 30 is closed. That is, the second micro switch 37 is turned off before the moving contact 34 11 contacts the static contact 34 2, and the controller of the power supply device 20 can receive the third signal and the fourth signal of the circuit breaker 30, and switch according to the two signals (i.e. when the third signal is switched to the fourth signal), so as to judge in advance the closing operation of the circuit breaker 30, thereby controlling the voltage state of the power supply line in the power supply device 20 in advance to ensure the stability of the output voltage and improve the voltage overshoot phenomenon of the power supply device 20, and ensure the smoother parallel current sharing control of the power supply and distribution system 10. In this embodiment, the second micro switch 37 only sends one signal to the controller, i.e. the third signal or the fourth signal. When the third signal is switched to the fourth signal, the controller switches according to the two signals to adjust the voltage.

[0055] In some embodiments, the circuit breaker 30 comprises the first micro switch 36 and the second micro switch 37, and four signals, i.e., the first signal, the second signal, the third signal and the fourth signal, can be sent to the controller to predict the switching between the closing state and the opening state of the circuit breaker 30, so that the voltage state of the power supply line in the power device 20 can be controlled in advance to ensure the output voltage stability and improve the voltage overshoot phenomenon of the power device 20, and the parallel current sharing control of the power supply and distribution system 10 is more smooth. Of course, in some embodiments, the circuit breaker 30 can only be provided with the second micro switch 37, so that only the third signal or the fourth signal is sent to the controller, and the controller only adjusts the voltage according to the closing operation of the circuit breaker 30.

[0056] In order to prepare for the next opening operation, during the closing operation of the circuit breaker 30, after the moving contact 3411 contacts the static contact 342, the main shaft 3412 continues to rotate in the second direction, so that the boss 34121 is separated from the rotating rod 3413 and spaced by a certain distance.

[0057] As shown in FIG. 13, when the second micro switch 37 is specifically provided, the second micro switch 37 comprises a second fixed plate 371, a second moving contact 372, a second static contact 373 and a second spring 374. The second fixed plate 371 is fixed relative to the housing 31. The second moving contact 372 is in sliding connection with the second fixed plate 371, and the second static contact 373 and the second spring 374 are located on the side of the second moving contact 372 away from the lever 34122. The second static contact 373 is fixed relative to the second fixed plate 371. One end of the second spring 374 is fixed relative to the second moving contact 372, and the other end of the second spring 374 is fixed relative to the second fixed plate 371. The lever 34122 is used to push the second moving contact 372, so that the second moving contact 372 slides on the second fixed plate 371 in the direction close to the second static contact 373 and contacts the second static contact 373, so that the second micro switch 37 is turned on. The lever 34122 is also used to separate from the second moving contact 372, so that the second moving contact 372 slides on the second fixed plate 371 in the direction away from the second static contact 373 and separates from the second static contact 373, so that the second micro switch 37 is turned off. The structure of the second micro switch 37 is simple, the lever 34122 rotates with the main shaft 3412 and pushes the second moving contact 372, so that the second moving contact 372 contacts the second static contact 373 to turn on the second micro switch 37, thereby avoiding misoperation. In addition, the second spring 374 can push the second moving contact 372 away from the second static contact 373 during the process that the lever 34122 moves away from the second moving contact 372. Moreover, the second spring 374 can play a buffering role when the lever 34122 pushes the second moving contact 372, so as to reduce the impact force of the second moving contact 372 on the second static contact 373.

[0058] In one embodiment, the second fixed plate 371 is provided with a second limiting rib 3711 near one end of the dial lever 34122. The second limiting rib 3711 is used to limit the position of the second movable contact 372 relative to the second fixed plate 371 when the second micro switch 37 is disconnected, thereby defining the maximum distance between the second movable contact 372 and the second fixed contact 373, and causing the dial lever 34122 to start moving away from the second movable contact 372 when the main shaft 3412 starts rotating in the second direction. In other words, when the second movable contact 372 slides towards the second limiting rib 3711 and contacts the second limiting rib 3711, the second movable contact 372 is disconnected from the second fixed contact 373. And during the opening process of the circuit breaker 30, the dial lever 34122 approaches the second movable contact 372 and pushes the second movable contact 372 to slide towards the second fixed contact 373, so that the second movable contact 372 and the second fixed contact 373 are in contact after closing, causing the second micro switch 37 to be turned on.

[0059] Figure 14 is a schematic diagram of the travel and level of the second micro switch according to an embodiment of the present application. As shown in Figure 14, when the main shaft 3412 is at travel 1, the circuit breaker 30 is in an open state, and the movable contact 3411 and the fixed contact 342 are separated. After the main shaft 3412 starts rotating in the second direction, at travel 2, the second movable contact 372 and the second fixed contact 373 are separated, at which time the level signal of the second micro switch 37 changes and is switched from the first level signal to the second level signal. Here, the third signal corresponds to the first level signal of the second micro switch 37, and the fourth signal corresponds to the second level signal of the second micro switch 37. The main shaft 3412 continues to rotate from travel 2 to travel 3, and the second movable contact 372 moves away from the second fixed contact 373, at which time the level signal of the second micro switch 37 does not change. At point B, the second movable contact 372 is at the maximum travel, that is, the distance between the second movable contact 372 and the second fixed contact 373 is maximum, and thereafter the second movable contact 372 stops moving.

[0060] In the circuit breaker 30 of the present application, the movable contact assembly 341 can further include a third spring 3414. One end of the third spring 3414 is connected to the rotating lever 3413, and the other end is connected to the main shaft 3412. The third spring 3414 is used to keep the rotating lever 3413 in contact with the boss 34121, so that the rotating lever 3413 is relatively fixed with the main shaft 3412. That is, when the rotating lever 3413 is in contact with the boss 34121, the third spring 3414 can relatively fix the rotating lever 3413 with the main shaft 3412.

[0061] As shown in FIG. 5 and FIG. 12, in one embodiment, the first micro switch 36 and the second micro switch 37 are oppositely arranged along the height direction h of the circuit breaker 30, and the first micro switch 36 and the second micro switch 37 are located between the movable contact assembly 341 and the operating mechanism 33, and the toggle lever 34122 extends between the first micro switch 36 and the second micro switch 37. That is, during the process that the movable contact 3411 and the stationary contact 342 switch from the contact state to the separation state, and switch from the separation state to the contact state, the toggle lever 34122 moves between the first micro switch 36 and the second micro switch 37.

[0062] The first micro switch 36 and the second micro switch 37 are specifically arranged at the position, and the baffle 38 is arranged in the housing 31. The baffle 38 is located between the movable contact assembly 341 and the operating mechanism 33, and the baffle 38 extends along the height direction h of the circuit breaker 30. The baffle 38 is provided with an opening 381, and the toggle lever 34122 passes through the opening 381. The first micro switch 36 and the second micro switch 37 are located at the side of the baffle 38 close to the operating mechanism 33, and the first micro switch 36 and the second micro switch 37 are oppositely arranged at two sides of the opening 381. Therefore, this embodiment arranges the first micro switch 36 and the second micro switch 37 by using the space between the operating mechanism 33 and the movable contact assembly 341, which is beneficial to simplify the structure of the circuit breaker 30. In one embodiment, the first fixed plate 361 and the second fixed plate 371 can be fixedly connected with the housing 31. In another embodiment, the first fixed plate 361 and the second fixed plate 371 can be part of the housing 31, and jointly constitute the baffle 38.

[0063] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A circuit breaker characterized by, The circuit breaker comprises a housing, an operating handle, an operating mechanism, a movable contact assembly, a stationary contact and a first micro switch. The operating handle is connected to the operating mechanism, and at least a part of the operating handle close to the operating mechanism, the operating mechanism, the movable contact assembly, the stationary contact and the first micro switch are located in the housing. The movable contact assembly comprises a main shaft and a rotating rod, and the main shaft and the rotating rod are rotatably connected to the housing respectively; the operating mechanism is in transmission connection with the main shaft; one end of the rotating rod is arranged close to the main shaft, and the other end extends away from the operating mechanism and is provided with a movable contact for contacting or separating from the stationary contact. The operating handle is used to control the operating mechanism to drive the main shaft to rotate, and the main shaft is provided with a boss for driving the rotating rod to rotate so as to separate the movable contact from the stationary contact. The main shaft is further provided with a push rod for turning on or off the first micro switch. When the circuit breaker is in a closed state, the boss is spaced apart from the rotating rod by a certain distance, and the push rod presses the first micro switch so as to turn on the first micro switch; during the process of switching the circuit breaker from the closed state to an open state, the operating mechanism drives the main shaft to rotate in a first direction, so that the push rod moves away from the first micro switch, and the boss moves towards the rotating rod, so that before the boss contacts the rotating rod, the first micro switch is turned off and switched from sending a first signal to sending a second signal, the first signal being different from the second signal; when the circuit breaker is in the closed state, the movable contact contacts the stationary contact; when the circuit breaker is in the open state, the movable contact separates from the stationary contact.

2. The circuit breaker of claim 1, wherein, The first micro switch comprises a first fixed plate, a first movable contact, a first stationary contact and a first spring; the first fixed plate is fixed relative to the housing, the first movable contact is in sliding connection with the first fixed plate, the first stationary contact and the first spring are located on a side of the first movable contact away from the push rod, and the first stationary contact is fixed relative to the first fixed plate; one end of the first spring is fixed relative to the first movable contact, and the other end is fixed relative to the first fixed plate. The push rod is used to push the first movable contact so that the first movable contact slides on the first fixed plate in a direction close to the first stationary contact and contacts the first stationary contact, so as to turn on the first micro switch; the push rod is also used to separate from the first movable contact, so that the first movable contact slides on the first fixed plate in a direction away from the first stationary contact and separates from the first stationary contact, so as to turn off the first micro switch.

3. The circuit breaker of claim 2, wherein, The first fixed plate is provided with a first limiting rib at an end close to the push rod, and the first limiting rib is used to limit the position of the first movable contact relative to the first fixed plate after the first micro switch is turned off.

4. The circuit breaker of claim 1, wherein, The circuit breaker further comprises a second micro switch, and the push rod is also used to turn on or off the second micro switch. When the circuit breaker is in the open state, the boss is in contact with the rotating rod, and the push rod presses the second micro switch to make the second micro switch conductive; when the circuit breaker is switched from the open state to the closed state, the operating mechanism drives the main shaft to rotate in the second direction, so that the push rod moves away from the second micro switch, and the rotating rod rotates towards the static contact, so that the second micro switch is disconnected and switched to send a fourth signal before the moving contact is in contact with the static contact, the third signal being different from the fourth signal; wherein the second direction is opposite to the first direction.

5. The circuit breaker of claim 4, wherein, When the circuit breaker is switched from the open state to the closed state, after the moving contact is in contact with the static contact, the main shaft continues to rotate in the second direction, so that the boss is separated from the rotating rod and spaced apart by the set distance.

6. The circuit breaker of claim 4 or 5, wherein, The second micro switch comprises a second fixed plate, a second moving contact, a second static contact and a second spring; the second fixed plate is fixed relative to the shell, the second moving contact is in sliding connection with the second fixed plate, the second static contact and the second spring are located on the side of the second moving contact away from the push rod, the second static contact is fixed relative to the second fixed plate, one end of the second spring is fixed relative to the second moving contact, and the other end is fixed relative to the second fixed plate; The push rod is used to push the second moving contact, so that the second moving contact slides on the second fixed plate in a direction close to the second static contact and is in contact with the second static contact, so that the second micro switch is conductive; the push rod is also used to separate from the second moving contact, so that the second moving contact slides on the second fixed plate in a direction away from the second static contact and is separated from the second static contact, so that the second micro switch is disconnected.

7. The circuit breaker of claim 6, wherein The second fixed plate is provided with a second limiting rib at one end close to the push rod, the second limiting rib being used to limit the position of the second moving contact relative to the first fixed plate after the second micro switch is disconnected.

8. The circuit breaker of claim 4, wherein, The moving contact assembly further comprises a third spring, one end of the third spring being connected with the rotating rod, and the other end being connected with the main shaft; the third spring is used to keep the rotating rod in contact with the boss, so that the rotating rod is fixed relative to the main shaft.

9. The circuit breaker of claim 4, wherein, The first micro switch and the second micro switch are arranged opposite to each other in the height direction of the circuit breaker and located between the moving contact assembly and the operating mechanism, and the push rod extends between the first micro switch and the second micro switch.

10. The circuit breaker of claim 9, wherein, The shell is provided with a baffle between the moving contact assembly and the operating mechanism and extending in the height direction of the circuit breaker; the baffle is provided with an opening, the push rod passes through the opening, and the first micro switch and the second micro switch are located on the side of the baffle close to the operating mechanism and arranged opposite to each other on both sides of the opening.

11. An electrical power device, characterized by The circuit breaker comprises a cabinet, a power supply, a controller, a plurality of power modules and a plurality of circuit breakers as claimed in any one of claims 1 to 10, the power supply is used to supply power to the plurality of power modules, the plurality of power modules are arranged one by one with the plurality of circuit breakers and are electrically connected, and the power supply and the plurality of circuit breakers are electrically connected with the controller respectively; the controller is used to receive the first signal or the second signal of the circuit breaker, and adjust the voltage of the power supply to the plurality of power modules when the first signal is switched to the second signal.

12. The power device of claim 11, wherein, The circuit breaker further comprises a second micro switch for sending a third signal or a fourth signal; the controller is used to receive the third signal or the fourth signal of the circuit breaker, and adjust the voltage of the power supply to the plurality of power modules when the third signal is switched to the fourth signal.

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