Circuit breaker and power equipment

Abstract

The utility model provides a circuit breaker and power equipment. The circuit breaker comprises a shell, 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 which are rotatably connected with the main shaft. The moving contact is located at one 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 that the moving contact is contacted with or separated from the static contact. The main shaft is provided with a boss, and the boss is used for driving the rotating rod to rotate, so that the moving contact is separated from the static contact. The main shaft is provided with a driving lever, and the driving lever can switch on or switch off the first microswitch. When the circuit breaker is in a closed state, the boss and the rotating rod are arranged in a spaced mode, and the shifting rod presses the first microswitch to enable the first microswitch to be kept on. During opening, the operating mechanism drives the main shaft to rotate, so that the driving lever is far away from the first microswitch and is disconnected before the moving contact is separated from the static contact, and the first microswitch switches a sent signal to adjust the voltage state of the power equipment in advance and ensure the stability of the output voltage.

Description

Technical Field

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

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

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

[0004] The circuit breaker includes a moving contact and a stationary contact. When the circuit breaker is closed, the moving contact contacts the stationary contact, and the circuit breaker sends a closing signal to the power supply and distribution system; when the circuit breaker is opened, the moving contact separates from the stationary contact, and the circuit breaker sends an opening signal to the power supply and distribution system. However, at the moment of opening or closing the circuit breaker, the total voltage of the power supply and distribution system will change instantly, which is easy to overshoot the inverter and load in the system, which is not conducive to the voltage output stability of the system. Utility Model Content

[0005] The present application provides a circuit breaker and an electric power device, so that the circuit breaker switches the signal sent before disconnecting, so as to enable the electric power device to pre-judge the switching of the circuit breaker's opening and closing state, thereby adjusting the output voltage of the electric power device in advance, ensuring the stability of the output voltage, and further improving the voltage overshoot phenomenon of the electric power device.

[0006] In a first aspect, the present application provides a circuit breaker. The circuit breaker includes a housing, an operating handle, an operating mechanism, a moving contact assembly, a static contact, and a first micro switch. Specifically, the operating handle is connected to the operating mechanism, and at least the portion of the operating handle close to the operating mechanism, the operating mechanism, the moving contact assembly, the static contact, and the first micro switch are located in the housing. The moving contact assembly includes a main shaft and a rotating rod, and the main shaft and the rotating rod are respectively connected to the housing for rotation. The operating mechanism is connected to the main shaft by transmission. One end of the rotating rod is arranged close to the main shaft, and the other end extends in a direction away from the operating mechanism and is provided with a moving contact, and the moving contact is used to contact or separate with the static contact. The operating handle is used to control the operating mechanism to drive the main shaft to rotate so that the moving contact is in contact with or separated from the static contact. The main shaft is provided with a boss, and the boss is used to drive the rotating rod to rotate so that the moving contact is separated from the static contact. The main shaft is also provided with a lever, and the lever is used to turn on or off the first micro switch. When the circuit breaker is in the closed state, the boss is spaced a set distance from the rotating rod, and the lever presses the first micro switch, thereby turning on the first micro switch. When the circuit breaker is in the opening operation (i.e., when the circuit breaker is switched from the closed state to the opening state), the operating mechanism can drive the main shaft to rotate in a first direction, so that the lever moves in a direction away from the first micro switch, and the boss moves toward the rotating rod, so that before the boss contacts the rotating rod, the first micro switch is disconnected and switches from sending the first signal to sending the second signal, and the first signal is different from the second signal.

[0007] In the circuit breaker of the present application, during the rotation of the main shaft, the lever gradually moves away from the first micro switch along with the main shaft, and the boss moves toward the rotating rod along with the main shaft. Before the boss contacts the rotating rod, the first micro switch is disconnected and the transmitted signal can be switched. The main shaft continues to rotate, the boss contacts the rotating rod and begins to push the rotating rod to rotate, thereby driving the moving contact to separate from the static contact. In other words, the first micro switch is disconnected before the moving contact is separated from the static contact, and the controller of the power equipment can receive two different signals from the circuit breaker, and can pre-judge the opening operation of the circuit breaker, thereby controlling the switching voltage state of the power supply line in the power equipment in advance to ensure the output voltage stability and improve the voltage overshoot phenomenon of the power equipment.

[0008] When the first micro switch is specifically set, the first micro switch may include a first fixed plate, a first moving contact, a first static contact and a first spring. The first fixed plate is relatively fixed to the housing, the first moving contact is slidably connected to the first fixed plate, the first static contact and the first spring are respectively located on the side of the first moving contact away from the lever, and the first static contact is relatively fixed to the first fixed plate. One end of the first spring is relatively fixed to the first moving contact, and the other end is relatively fixed to the first fixed plate. The lever is used to push the first moving contact so that the first moving contact slides on the first fixed plate in a direction close to the first static contact and contacts the first static contact, thereby turning on the first micro switch. In addition, the lever is also used to separate from the first moving contact so that the first moving contact slides on the first fixed plate in a direction away from the first static contact and separates from the first static contact, thereby turning off the first micro switch. The structure of the first micro switch is simple. The lever pushes the first moving contact in the process of following the rotation of the main shaft, so that the first moving contact contacts the first static contact, so as to achieve accurate conduction of the first micro switch, thereby avoiding misoperation. In addition, the first spring can push the first movable contact away from the first static contact when the lever moves away from the first movable contact. Also, 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 static contact.

[0009] In a possible implementation, a first limiting rib is disposed at one end of the first fixing plate close to the lever. The first limiting rib is used to limit the position of the first moving contact relative to the first fixing plate after the first micro switch is disconnected, thereby limiting the maximum distance between the first moving contact and the first static contact.

[0010] In a possible implementation, the circuit breaker may further include a second micro switch, and the lever is also used to turn on or off the second micro switch. When the circuit breaker is in the open state, the boss contacts the rotating rod, and the lever presses the second micro switch to turn on the second micro switch. When the circuit breaker performs a closing operation, the operating mechanism drives the main shaft to rotate in the second direction, so that the lever moves in a direction away from the second micro switch, and the rotating rod rotates toward the static contact, so that before the moving contact contacts the static contact, the second micro switch is disconnected and switches from sending the third signal to sending the fourth signal, and the third signal is different from the fourth signal. Wherein, the second direction is opposite to the first direction. When the circuit breaker performs a closing operation (i.e., when the circuit breaker switches 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 toward the static contact. Before the moving contact contacts the static contact, the second micro switch is disconnected and switches the signal to be sent. The main shaft continues to rotate, and the moving contact contacts the static contact, closing the circuit breaker. That is, the second micro switch is disconnected before the moving contact contacts the static contact, and the controller of the power equipment can receive the third signal and the fourth signal of the circuit breaker, and can pre-judge the closing operation of the circuit breaker, thereby controlling the switching voltage state of the power supply line in the power equipment in advance to ensure the output voltage stability and improve the voltage overshoot phenomenon of the power equipment.

[0011] In order to prepare for the next opening operation, in a possible implementation, when the circuit breaker performs a closing operation, after the moving contact contacts the stationary 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 a set distance.

[0012] When the second micro switch is specifically set, the second micro switch may include a second fixed plate, a second moving contact, a second static contact and a second spring. The second fixed plate is relatively fixed to the housing, the second moving contact is slidably connected to the second fixed plate, the second static contact and the second spring are respectively located on the side of the second moving contact away from the lever, and the second static contact is relatively fixed to the second fixed plate. One end of the second spring is relatively fixed to the second moving contact, and the other end is relatively fixed to the second fixed plate. The lever 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 contacts the second static contact, so that the second micro switch is turned on. The lever 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 separates from the second static contact, so that the second micro switch is turned off. The second micro switch has a simple structure. The lever pushes the second moving contact in the process of following the rotation of the main shaft, so that the second moving contact contacts the second static contact, so as to achieve accurate conduction of the second micro switch, thereby avoiding misoperation. In addition, the second spring can push the second movable contact away from the second static contact when the lever moves away from the second movable contact. And when the lever pushes the second movable contact, the second spring can play a buffering role to reduce the impact force of the second movable contact on the second static contact.

[0013] In one possible implementation, a second limiting rib is provided at one end of the second fixed plate close to the lever, and the second limiting rib is used to limit the position of the second moving contact relative to the second fixed plate after the second micro switch is disconnected, thereby limiting the maximum distance between the second moving contact and the second static contact.

[0014] In the circuit breaker of the present application, the moving contact assembly may further include a third spring. One end of the third spring is connected to the rotating rod, and the other end is connected to the main shaft. The third spring is used to keep the rotating rod in contact with the boss so that the rotating rod and the main shaft are relatively fixed.

[0015] In a possible implementation, the first micro switch and the second micro switch are arranged opposite 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 moving contact assembly and the operating mechanism, and the lever extends between the first micro switch and the second micro switch. In other words, when the moving contact and the stationary contact are switched 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.

[0016] The positions of the first micro switch and the second micro switch are specifically set, and a baffle is set in the housing. The baffle is located between the moving contact assembly and the operating mechanism, and the baffle extends along the height direction of the circuit breaker. The baffle is provided with an opening, and the lever passes through the opening. The first micro switch and the second micro switch are located on a side of the baffle close to the operating mechanism, and are relatively arranged on both sides of the opening. Therefore, the technical solution uses the space between the operating mechanism and the moving contact assembly to set the first micro switch and the second micro switch, which is conducive to simplifying the structure of the circuit breaker.

[0017] In the second aspect, the present application also provides an electric power device. The electric power device includes a cabinet, and a power supply, a controller, a plurality of power modules and a plurality of circuit breakers of the first aspect described above, which are located in the cabinet. The power supply is used to supply power to the aforementioned plurality of power modules, and the aforementioned plurality of power modules are arranged one-to-one with the aforementioned plurality of circuit breakers and are electrically connected, and the power supply and the aforementioned plurality of circuit breakers are electrically connected to the controller, respectively. The controller is used to receive a first signal or a second signal from the circuit breaker, and when the first signal is switched to the second signal, adjust the voltage supplied by the power supply to the aforementioned plurality of power modules. In the present application, the circuit breaker can send a first signal or a second signal to the controller, and the controller can pre-judge the opening operation of the circuit breaker according to the switching between the received first signal and the second signal, thereby controlling the voltage adjustment state of the line supplying power to the power module in the electric power device in advance, so as to ensure the stability of the output voltage and improve the voltage overshoot phenomenon of the electric power device.

[0018] In a possible implementation, the circuit breaker may further include a second micro switch. The second micro switch is used to send a third signal or a fourth signal. The controller is used to receive the third signal or the fourth signal, and when the third signal is switched to the fourth signal, adjust the voltage of the power supply to the aforementioned multiple power modules. In this way, the controller can pre-determine the closing operation of the circuit breaker according to the switching between the third signal and the fourth signal received. The power equipment can simultaneously implement the pre-closing and pre-opening operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of an application scenario of a circuit breaker provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of an electric power device provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of a circuit breaker provided in an embodiment of the present application;

[0022] Figure 4 for Figure 3 A cross-sectional view of the circuit breaker along the AA direction;

[0023] Figure 5 for Figure 3The cross-section of the circuit breaker along the AA direction;

[0024] Figure 6 A schematic diagram of a main shaft provided in an embodiment of the present application;

[0025] Figure 7 Another schematic diagram of the main shaft provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of a moving contact assembly provided in an embodiment of the present application;

[0027] Fig. 9 Another schematic diagram of a moving contact assembly provided in an embodiment of the present application;

[0028] Fig.10 for Figure 5 The enlarged view of the part in the middle dotted box;

[0029] Fig.11 A schematic diagram of the stroke and level of the first micro switch provided in an embodiment of the present application;

[0030] Fig.12 for Figure 3 The cross-section of the circuit breaker along the AA direction;

[0031] Fig.13 for Fig.12 The enlarged view of the part in the middle dotted box;

[0032] Fig.14 A schematic diagram of the travel and level of the second micro switch provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 10-Power supply and distribution system

[0035] 11-Power module

[0036] 20-Electrical equipment

[0037] 21-Cabinet

[0038] 210-User Operation Panel

[0039] 30-Circuit Breaker

[0040] 31- Shell

[0041] 32-Operation handle

[0042] 33-Operating mechanism

[0043] 34-Flow Components

[0044] 35-Interrupter

[0045] 36-First micro switch

[0046] 37-Second micro switch

[0047] 38-Baffle

[0048] 310-Circuit breaker operation panel

[0049] 341-Moving contact assembly

[0050] 342-static contact

[0051] 361-First fixed plate

[0052] 362-First moving contact

[0053] 363-First static contact

[0054] 364-First Spring

[0055] 371-Second fixed plate

[0056] 372-Second moving contact

[0057] 373-Second static contact

[0058] 374-Second spring

[0059] 381-Opening

[0060] 3411-Moving contact

[0061] 3412-Spindle

[0062] 3413-Rotation rod

[0063] 3414-Third spring

[0064] 3611-First limiting rib

[0065] 3711-Second limiting rib

[0066] 34121-Boss

[0067] 34122-Lever DETAILED DESCRIPTION

[0068] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0069] In order to facilitate understanding of the circuit breaker and power equipment provided in the embodiment of the present application, the application scenarios are described below. The circuit breaker and power equipment provided in the embodiment of the present application can be widely used in various power supply and distribution systems. In an example provided in the present application, the circuit breaker can be used in the power supply and distribution system of the data center to connect, carry, and disconnect the current between the power supply network and the data center. Figure 1 A schematic diagram of an application scenario of a circuit breaker provided in an embodiment of the present application. Figure 1 As shown, the power supply and distribution system 10 may include a power module 11 (such as Figure 1 As shown in the figure, there are a power module 11 composed of multiple UPS connected in series) and multiple circuit breakers. Take the power supply and distribution system 10 as an example, which is provided with three circuits, namely the first circuit C1, the second circuit C2, and the third circuit C3. A circuit breaker is provided in each circuit, wherein the first circuit C1 is connected to the power module 11, and a first circuit breaker K1 is provided at the input end of the power module 11, and a second circuit breaker K2 is provided at the output end; the second circuit C2 is connected to the bypass module, and a third circuit breaker K3 is provided at one end of the bypass module, and the other end is connected to the second circuit breaker K2; the third circuit C3 is a backup circuit, and a fourth circuit breaker K4 is provided.

[0070] When it is necessary to connect the circuit between the power supply network (or power supply) and the data center, the first circuit breaker K1 and the second circuit breaker K2 can be switched to the closed state; when it is necessary to disconnect the circuit between the power supply network and the data center, the first circuit breaker K1 or the second circuit breaker K2 can be switched to the open state. In this way, the power-on and power-off states of the data center are controlled by controlling the closed state and the open state of the circuit breaker. When the electrical equipment in the data center needs to be inspected and maintained, the first circuit breaker K1 can be switched to the open state, and the third circuit breaker K3 or the fourth circuit breaker K4 can be switched to the closed state, so as to facilitate the inspection and maintenance of the electrical equipment.

[0071] In addition, the circuit breaker of the present application can also be used in the power supply and distribution system 10 of enterprise power equipment or public power equipment to connect, carry, and disconnect the current between the power supply network and the enterprise power equipment or public power equipment. For example, when the power equipment (such as 4G base stations, 5G base stations, etc.) needs to work normally, the staff can switch the circuit breaker to the closed state so that the power supply network can provide the power equipment with the power required for normal operation. When the power equipment needs to be inspected and maintained, the staff can switch the circuit breaker to the open state to facilitate the inspection and maintenance of the power equipment.

[0072] The power supply and distribution system 10 may specifically include a plurality of power equipment. Figure 2 A schematic diagram of an electric power device provided in an embodiment of the present application. Figure 2As shown, 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. Among them, the side of the cabinet 21 facing the staff is a user operation surface 210. In the present application, taking the state where the cabinet 21 is placed on the ground as an example, the dimension of the user operation surface 210 parallel to the ground is the width, the dimension of the user operation surface 210 perpendicular to the ground is the height, and the dimension of the cabinet 21 perpendicular to the user operation surface 210 is the depth. The aforementioned multiple power modules are stacked in sequence along the height direction H of the cabinet 21, and the aforementioned multiple circuit breakers are placed in sequence on one side of the aforementioned multiple power modules along the width direction W of the cabinet 21. Among them, the power module is used to convert the voltage from the power grid to output an adapted voltage to the load device. Specifically, the power module may be an AC / AC module or an AC / DC module. The power supply is used to supply power to the aforementioned multiple power modules. The aforementioned multiple power modules are arranged one by one with the aforementioned multiple circuit breakers and are electrically connected. The power supply and the plurality of circuit breakers are electrically connected to the controller respectively.

[0073] The existing circuit breaker sends a signal to the power supply and distribution system at the moment of closing or opening. However, at this time, the total voltage in the power supply and distribution system has changed instantly, which is easy to cause voltage overshoot to the inverter and load in the system, which is not conducive to the safety of the system and the stability of 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 disconnecting, so as to pre-judge the switching of the circuit breaker's opening and closing state for the power device, so that the output voltage of the power device can be adjusted in advance to ensure the stability of the output voltage, thereby improving the voltage overshoot phenomenon of the power device.

[0074] It should be noted that the terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to be limiting of the present application. As used in the specification and appended claims of the present application, the singular expressions "a", "an", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context.

[0075] References to "one embodiment" or "some embodiments" etc. described in this specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in one or more embodiments of the present application. Thus, the phrases "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear at different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0076] Figure 3 A schematic diagram of a circuit breaker provided in an embodiment of the present application, Figure 4 for Figure 3 The cross-sectional view of the circuit breaker along the AA direction. Figure 3 and Figure 4 As shown, the circuit breaker 30 includes a housing 31, an operating handle 32, an operating mechanism 33 and a flow assembly 34. Specifically, the operating handle 32 is connected to the operating mechanism 33. The flow assembly 34 includes a moving contact assembly 341 and a stationary contact 342, and the moving contact assembly 341 can rotate relative to the housing 31. The moving contact assembly 341 includes a moving contact 3411, and the stationary contact 342 can be arranged on a side of the moving contact assembly 341 away from the operating mechanism 33 along the depth direction of the circuit breaker 30, or the stationary contact 342 can also be arranged on a side of the moving contact assembly 341 away from the operating mechanism 33 along the height direction of the circuit breaker 30. In one embodiment, one end of the operating handle 32 away from the operating mechanism 33 can extend out of the housing 31, so that the staff can push the operating handle 32 to perform closing and opening operations. In another embodiment, the housing 31 is provided with a knob to realize the opening and closing of the circuit breaker 30 by manual operation of the knob. Specifically, one end of the operating handle 32 away from the operating mechanism 33 is connected to the knob. When the staff performs manual operation of the knob, the knob is turned to drive the operating handle 32 to be pushed along the height direction h of the circuit breaker 30. In another embodiment, the circuit breaker 30 may also include a remote controller and an electric operating device, the electric operating device is connected to the operating handle 32, and the electric operating device is connected to the remote controller in communication, so as to realize the opening and closing of the circuit breaker 30 through electric operation. When the staff performs electric operation, a closing command or an opening command is sent to the remote controller, and the remote controller can control the electric operating device to push the operating handle 32. In this embodiment, the staff can approach the circuit breaker 30 to issue a command, or can also issue a command remotely through a communication device.

[0077] like Figure 4As shown, in one embodiment, at least the portion of the operating handle 32 close to the operating mechanism 33, the operating mechanism 33 and the moving contact assembly 341 can be sequentially arranged in the housing 31 along the depth direction d of the circuit breaker 30. The operating handle 32 is used to control the operating mechanism 33 to drive the moving contact assembly 341 to move, so that the moving contact 3411 is in contact with or separated from the static contact 342. Further, the circuit breaker 30 may also include an arc extinguishing chamber 35, which is located on the side of the moving contact assembly 341 away from the operating mechanism 33 along the depth direction d of the circuit breaker 30. The arc extinguishing chamber 35 is used to eliminate the arc generated when the moving contact 3411 is separated from the static contact 342. In one embodiment, the static contact 342 is located on one side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30. The movement trajectory of the moving contact 3411 extends from the static contact 342 to the other side of the arc extinguishing chamber 35 along the height direction h of the circuit breaker 30.

[0078] In the present application, the side of the operating handle 32 extending out of the housing 31 is the circuit breaker operating surface 310. Taking the circuit breaker operating surface 310 as an example, the dimension of the circuit breaker 30 along the pushing direction of the operating handle 32 is the height, the dimension perpendicular to the height direction h is the width, and the dimension perpendicular to the circuit breaker operating surface 310 is the depth. In other words, the operating handle 32, the operating mechanism 33, the current-passing assembly 34 and the arc extinguishing chamber 35 are sequentially arranged along the depth direction d of the circuit breaker 30. When the circuit breaker 30 is placed in the cabinet 21, in one embodiment, the height direction h of the circuit breaker 30 can be in the same direction as the width direction W of the cabinet 21, the width direction w of the circuit breaker 30 can be in the same direction as the height direction H of the cabinet 21, and the depth direction d of the circuit breaker 30 can be in the same direction as the depth direction D of the cabinet 21. Therefore, when the staff performs the closing operation or the opening operation on the circuit breaker 30, the staff pushes the operating handle 32 along the width direction W of the cabinet 21. When the operating handle 32 is pushed to perform an opening operation or a closing operation, the operating mechanism 33 can move with the operating handle 32 to drive the moving contact 3411 to separate from or contact the static contact 342. When the moving contact 3411 is in contact with the static contact 342, the circuit breaker 30 is in a closed state; when the moving contact 3411 is separated from the static contact 342, the circuit breaker 30 is in an opening state. Of course, in another embodiment, the width direction w of the circuit breaker 30 can be in the same direction as the width direction W of the cabinet 21, the height direction h of the circuit breaker 30 can be in the same direction as the height direction H of the cabinet 21, and the depth direction d of the circuit breaker 30 can be in the same direction as the depth direction D of the cabinet 21, and this application does not make specific restrictions.

[0079] like Figure 4As shown, when the operating handle 32, the operating mechanism 33, the current-passing assembly 34 and the arc-extinguishing chamber 35 are sequentially arranged along the depth direction d of the circuit breaker 30, the housing 31 may include a front cover 311 and a rear cover assembly 312 sequentially arranged along the depth direction d of the circuit breaker 30. At least the portion of the operating handle 32 close to the operating mechanism 33, the operating mechanism 33, the moving contact assembly 341 and the arc-extinguishing chamber 35 are sequentially arranged in the rear cover assembly 312 along the depth direction d of the circuit breaker 30, and the operating handle 32 is arranged close to the front cover 311. Therefore, the operating handle 32, the operating mechanism 33, the moving contact assembly 341 and the arc-extinguishing chamber 35 are considered to be arranged in a layered form, thereby reducing the height dimension of the circuit breaker 30 and reducing the occupied space of the circuit breaker 30, so as to increase the number of circuit breakers 30 that can be arranged in the cabinet 21. Specifically, the operating handle 32 is located at the first layer (electrical or manual operation layer), the operating mechanism 33 is located at the second layer (operating layer), a part of the current-passing assembly 34 is located at the third layer (current-passing layer), and the arc extinguishing chamber 35 is located at the fourth layer (arc extinguishing layer). Among them, the moving contact 3411 can 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 can be beneficial to minimizing the height direction h of the circuit breaker 30. In addition, while the moving contact 3411 is miniaturized, the driving force arm of the moving contact 3411 and the static contact 342 for closing the switch can be larger, thereby reducing the driving force of the operating mechanism 33, which is beneficial to the operational stability of the operating mechanism 33.

[0080] Figure 5 for Figure 3 The cross-sectional view of the circuit breaker along the AA direction, where: Figure 5 The operating handle, operating mechanism and arc extinguishing chamber are omitted, and the circuit breaker is in the closed state. Figure 5 As shown, 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 rotatably connected to the housing 31. One end of the rotating rod 3413 is arranged close to the main shaft 3412, and the rotating rod 3413 extends in a direction away from the operating mechanism 33, and the moving contact 3411 is arranged at one end of the rotating rod 3413 away from the operating mechanism 33. The operating mechanism 33 is transmission-connected to 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 static contact 342.

[0081] Figure 6 A schematic diagram of a main shaft provided in an embodiment of the present application, Figure 7 Another schematic diagram of the main shaft provided in the embodiment of the present application, wherein: Figure 7 Show Figure 6 The cross-sectional view of the central axis along the BB direction. Figure 6 and Figure 7As shown, the main shaft 3412 is provided with a boss 34121, and the boss 34121 is used to contact the rotating rod 3413 and drive the rotating rod 3413 to rotate, so that the moving contact 3411 is separated from the static contact 342. The circuit breaker 30 also includes a first micro switch 36, and the first micro switch 36 is electrically connected to the controller. The main shaft 3412 is provided with a lever 34122, and the lever 34122 is used to turn on or off the first micro switch 36. When the circuit breaker 30 is in a closed state, the boss 34121 is spaced from the rotating rod 3413 by a set distance, and the lever 34122 presses the first micro switch 36 to turn on the first micro switch 36.

[0082] Figure 8 A schematic diagram of a moving contact assembly provided in an embodiment of the present application, Fig. 9 Another schematic diagram of a moving contact assembly provided in an embodiment of the present application, wherein: Fig. 9 Show Figure 8 The cross-sectional view of the central axis along the CC direction. Figure 8 and Fig. 9 As shown, when the circuit breaker 30 is opening, that is, in the process of switching from the closed state to the open state (that is, it has not yet completely reached the open state, but is in the dynamic process of switching from the closed state to the open state), the operating mechanism 33 drives the main shaft 3412 along the first direction (such as Figure 5The first micro switch 36 is rotated in the clockwise direction (in the middle), so that the lever 34122 gradually moves away from the first micro switch 36, and the boss 34121 moves toward the rotating rod 3413, so that before the boss 34121 contacts the rotating rod 3413, the first micro switch 36 is disconnected and the first signal sent to the controller is switched to the second signal. 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 toward the rotating rod 3413. And before the boss 34121 contacts the rotating rod 3413, the first micro switch 36 is disconnected 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 to say, the first micro switch 36 is disconnected before the moving contact 3411 is separated from the static contact 342, and the controller of the power equipment 20 can receive the first signal and the second signal of the circuit breaker 30, and switch according to the two signals (that is, when the first signal is switched to the second signal), and pre-judge the opening operation of the circuit breaker 30, so as to control the switching voltage state of the power supply line in the power equipment 20 in advance to ensure the output voltage stability, and improve the voltage overshoot phenomenon of the power equipment 20, so as to ensure that the parallel current sharing control of the power supply and distribution system 10 is smoother. In this embodiment, the first micro switch 36 only sends one signal when sending a signal to the controller, that is, 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 to adjust the voltage.

[0083] Fig.10 for Figure 5 The enlarged view of the part in the dotted box. Fig.10As shown, when the first micro switch 36 is specifically arranged, the first micro switch 36 includes a first fixed plate 361, a first moving contact 362, a first static contact 363 and a first spring 364. The first fixed plate 361 is relatively fixed to the housing 31. The first moving contact 362 is slidably connected to the first fixed plate 361. The first static contact 363 and the first spring 364 are respectively located on the side of the first moving contact 362 away from the lever 34122. The first static contact 363 is relatively fixed to the first fixed plate 361. One end of the first spring 364 is relatively fixed to the first moving contact 362, and the other end of the first spring 364 is relatively fixed to the first fixed plate 361. The lever 34122 is used to push the first moving contact 362, so that the first moving contact 362 slides on the first fixed plate 361 in a direction close to the first static contact 363 and contacts the first static contact 363, so that the first micro switch 36 is turned on. The lever 34122 is also used to separate from the first moving contact 362, so that the first moving contact 362 slides on the first fixed plate 361 in a direction away from the first static contact 363 and separates from the first static contact 363, so that the first micro switch 36 is disconnected. The structure of the first micro switch 36 is simple. The lever 34122 pushes the first moving contact 362 in the process of following the rotation of the main shaft 3412, so that the first moving contact 362 contacts the first static contact 363, so as to realize the conduction of the first micro switch 36, thereby avoiding misoperation. In addition, the first spring 364 can push the first moving contact 362 away from the first static contact 363 in the process of the lever 34122 moving away from the first moving contact 362. And when the lever 34122 pushes the first moving contact 362, the first spring 364 can play a buffering role to reduce the impact force of the first moving contact 362 on the first static contact 363.

[0084] In one embodiment, a first limiting rib 3611 is provided at one end of the first fixing plate 361 close to the lever 34122. The first limiting rib 3611 is used to limit the position of the first moving contact 362 relative to the first fixing plate after the first micro switch 36 is disconnected, thereby defining the maximum distance between the first moving contact 362 and the first static contact 363, and making the lever 34122 start to move away from the first moving contact 362 when the main shaft 3412 starts to rotate along the first direction. In other words, when the first moving contact 362 slides toward the first limiting rib 3611 and contacts the first limiting rib 3611, the first moving contact 362 is disconnected from the first static contact 363. In addition, during the closing process of the circuit breaker 30, the lever 34122 approaches the first moving contact 362 and pushes the first moving contact 362 to slide toward the first static contact 363, so that after closing, the first moving contact 362 and the first static contact 363 contact, and the first micro switch 36 is turned on.

[0085] Fig.11This is a schematic diagram of the stroke and level of the first micro switch provided in the embodiment of the present application. Fig.11 As shown, when the main shaft 3412 is at stroke 1, the circuit breaker 30 is in the closed state, and the moving contact 3411 is in contact with the static contact 342. After the main shaft 3412 starts to rotate in the first direction, at stroke 2, the first moving contact 362 and the first static contact 363 are separated, and at this time, the level signal of the first micro switch 36 changes and switches from the first level signal to the second level signal, where 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 in a direction away from the first static contact 363, and at this time, the level signal of the first micro switch 36 remains unchanged. 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 static contact 363 is the maximum, 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 drive the rotating rod 3413 to rotate.

[0086] Fig.12 for Figure 3 The cross-section of the circuit breaker along the AA direction, Fig.13 for Fig.12 The enlarged view of the part in the dashed box, where Fig.12 The operating handle, operating mechanism and arc extinguishing chamber are omitted, and the circuit breaker is in the open state. Fig.12 and Fig.13As shown, the circuit breaker 30 may further include a second micro switch 37 disposed near the lever 34122. The lever 34122 is also used to turn on or off the second micro switch 37. When the circuit breaker 30 is in the opening state, the boss 34121 contacts the rotating rod 3413, and the lever 34122 presses the second micro switch 37 to turn on the second micro switch 37. When the circuit breaker 30 performs a closing operation, the operating mechanism 33 drives the main shaft 3412 to rotate in a second direction (the second direction is opposite to the first direction), so that the lever 34122 gradually moves away from the second micro switch 37, and the rotating rod 3413 rotates toward the static contact 342, so that before the moving contact 3411 contacts the static contact 342, the second micro switch 37 is turned off and switches from sending the third signal to the controller to sending the fourth signal. When the circuit breaker 30 performs a closing operation, that is, in the process of switching from the open state to the closed state (that is, it has not yet completely reached the closed state, but is in the dynamic process of switching from the open state to the closed state), the operating mechanism 33 drives the main shaft 3412 to rotate in the second direction. During the rotation of the main shaft 3412, the lever 34122 gradually moves away from the second micro switch 37, and the moving contact 3411 moves toward the static contact 342. Before the moving contact 3411 contacts the static contact 342, the second micro switch 37 is disconnected and switches the signal sent to the controller. Subsequently, the moving contact 3411 contacts the static contact 342, closing the circuit breaker 30. That is to say, the second micro switch 37 is disconnected before the moving contact 3411 contacts the static contact 342, and the controller of the power equipment 20 can receive the third signal and the fourth signal of the circuit breaker 30, and switch according to these two signals (that is, when the third signal is switched to the fourth signal), and pre-judge the closing operation of the circuit breaker 30, so as to control the switching voltage state of the power supply line in the power equipment 20 in advance to ensure the output voltage stability, and improve the voltage overshoot phenomenon of the power equipment 20, so as to ensure that the parallel current sharing control of the power supply and distribution system 10 is smoother. In this embodiment, the second micro switch 37 only sends one signal when sending a signal to the controller, that is, the third signal or the fourth signal. When the third signal is switched to the fourth signal, the controller switches according to these two signals to adjust the voltage.

[0087] In some embodiments, the circuit breaker 30 includes a first micro switch 36 and a second micro switch 37, which can send four signals, namely, a first signal, a second signal, a third signal and a fourth signal, to the controller to pre-determine the switching between the closing state and the opening state of the circuit breaker 30, so as to control the switching voltage state of the line supplied by the power equipment 20 in advance, so as to ensure the stability of the output voltage, improve the voltage overshoot phenomenon of the power equipment 20, and ensure that the parallel current sharing control of the power supply and distribution system 10 is smoother. Of course, in some embodiments, the circuit breaker 30 can only be provided with the second micro switch 37, so as to only send the third signal or the fourth signal to the controller, and the controller only pre-adjusts the voltage according to the closing operation of the circuit breaker 30.

[0088] 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 stationary 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 apart by a set distance.

[0089] like Fig.13 As shown, when the second micro switch 37 is specifically provided, the second micro switch 37 includes 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 relatively fixed to the housing 31. The second moving contact 372 is slidably connected to the second fixed plate 371, and the second static contact 373 and the second spring 374 are respectively located on the side of the second moving contact 372 away from the lever 34122. The second static contact 373 is relatively fixed to the second fixed plate 371. One end of the second spring 374 is relatively fixed to the second moving contact 372, and the other end of the second spring 374 is relatively fixed 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 a 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 a direction away from the second static contact 373 and separates from the second static contact 373, so that the second micro switch 37 is disconnected. 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, so as to realize the conduction of 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 of the lever 34122 moving away from the second moving contact 372. And when the lever 34122 pushes the second moving contact 372, the second spring 374 can play a buffering role to reduce the impact force of the second moving contact 372 on the second static contact 373.

[0090] In one embodiment, a second limiting rib 3711 is provided at one end of the second fixing plate 371 close to the lever 34122. The second limiting rib 3711 is used to limit the position of the second moving contact 372 relative to the second fixing plate 371 when the second micro switch 37 is disconnected, thereby defining the maximum distance between the second moving contact 372 and the second static contact 373, and making the lever 34122 start to move away from the second moving contact 372 when the main shaft 3412 starts to rotate in the second direction. In other words, when the second moving contact 372 slides toward the second limiting rib 3711 and contacts the second limiting rib 3711, the second moving contact 372 is disconnected from the second static contact 373. Furthermore, when the circuit breaker 30 is opening, the lever 34122 approaches the second moving contact 372 and pushes the second moving contact 372 to slide toward the second static contact 373, so that after closing, the second moving contact 372 and the second static contact 373 are in contact, making the second micro switch 37 turned on.

[0091] Fig.14 This is a schematic diagram of the stroke and level of the second micro switch provided in the embodiment of the present application. Fig.14 As shown, when the main shaft 3412 is at stroke 1, the circuit breaker 30 is in the open state, and the moving contact 3411 and the static contact 342 are separated. When the main shaft 3412 starts to rotate in the second direction, at stroke 2, the second moving contact 372 and the second static contact 373 are separated, and at this time, the level signal of the second micro switch 37 changes and switches from the first level signal to the second level signal, where 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 stroke 2 to stroke 3, and the second moving contact 372 moves in a direction away from the second static contact 373, and at this time, the level signal of the second micro switch 37 remains unchanged. At point B, the second moving contact 372 is at the maximum stroke, that is, the distance between the second moving contact 372 and the second static contact 373 is the largest, and then the second moving contact 372 stops moving.

[0092] In the circuit breaker 30 of the present application, the moving contact assembly 341 may further include a third spring 3414. One end of the third spring 3414 is connected to the rotating rod 3413, and the other end is connected to the main shaft 3412. The third spring 3414 is used to keep the rotating rod 3413 in contact with the boss 34121, so that the rotating rod 3413 and the main shaft 3412 are relatively fixed. That is, when the rotating rod 3413 is in contact with the boss 34121, the third spring 3414 can make the rotating rod 3413 and the main shaft 3412 relatively fixed.

[0093] like Figure 5 and Fig.12As shown, in one embodiment, the first micro switch 36 and the second micro switch 37 are arranged opposite to each other 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 moving contact assembly 341 and the operating mechanism 33, and the lever 34122 extends between the first micro switch 36 and the second micro switch 37. That is, in the process of the moving contact 3411 and the static contact 342 switching from the contact state to the separation state and from the separation state to the contact state, the lever 34122 moves between the first micro switch 36 and the second micro switch 37.

[0094] Specifically, the positions of the first micro switch 36 and the second micro switch 37 are arranged, and a baffle 38 is arranged in the housing 31. The baffle 38 is located between the moving 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 lever 34122 passes through the opening 381. The first micro switch 36 and the second micro switch 37 are located on a side of the baffle 38 close to the operating mechanism 33, and the first micro switch 36 and the second micro switch 37 are relatively arranged on both sides of the opening 381. Therefore, this embodiment uses the space between the operating mechanism 33 and the moving contact assembly 341 to arrange the first micro switch 36 and the second micro switch 37, which is conducive to simplifying the structure of the circuit breaker 30. In one embodiment, the first fixing plate 361 and the second fixing plate 371 can be fixedly connected to the housing 31. In another embodiment, the first fixing plate 361 and the second fixing plate 371 can be part of the housing 31, and together constitute the baffle 38.

[0095] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A circuit breaker, characterized in that: It includes a housing, an operating handle, an operating mechanism, a moving contact assembly, a stationary contact and a first micro switch, wherein: The operating handle is connected to the operating mechanism, and at least a portion 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, wherein the main shaft and the rotating rod are respectively connected to the housing for rotation; the operating mechanism is connected to the main shaft for transmission; one end of the rotating rod is arranged close to the main shaft, and the other end of the rotating rod extends in a direction away from the operating mechanism and is provided with a moving contact, and the moving contact is used to contact or separate with the stationary contact; The operating handle is used to control the operating mechanism to drive the main shaft to rotate, the main shaft is provided with a boss, and the boss is used to drive the rotating rod to rotate so as to separate the moving contact from the static contact; The main shaft is also provided with a lever, and the lever is used to turn on or off the first micro switch; When the circuit breaker is in a closed state, the boss is spaced a set distance from the rotating rod, and the lever presses the first microswitch to turn on the first microswitch; when the circuit breaker is switched from a closed state to an open state, the operating mechanism drives the main shaft to rotate in a first direction, so that the lever moves in a direction away from the first microswitch, and the boss moves toward the rotating rod, so that before the boss contacts the rotating rod, the first microswitch is disconnected and switches from sending a first signal to sending a second signal, and the first signal is different from the second signal; wherein, when the circuit breaker is in a closed state, the moving contact contacts the static contact; when the circuit breaker is in an open state, the moving contact is separated from the static contact.

2. The circuit breaker according to claim 1, characterized in that The first micro switch comprises a first fixed plate, a first moving contact, a first static contact and a first spring; the first fixed plate is relatively fixed to the housing, the first moving contact is slidably connected to the first fixed plate, the first static contact and the first spring are respectively located on a side of the first moving contact away from the lever, and the first static contact is relatively fixed to the first fixed plate; one end of the first spring is relatively fixed to the first moving contact, and the other end is relatively fixed to the first fixed plate; The lever is used to push the first moving contact, so that the first moving contact slides on the first fixed plate in a direction close to the first static contact and contacts the first static contact, so that the first micro switch is turned on; the lever is also used to separate from the first moving contact, so that the first moving contact slides on the first fixed plate in a direction away from the first static contact and separates from the first static contact, so that the first micro switch is turned off.

3. The circuit breaker according to claim 2, characterized in that A first limiting rib is disposed at one end of the first fixing plate close to the shifting rod, and the first limiting rib is used to limit the position of the first moving contact relative to the first fixing plate after the first micro switch is disconnected.

4. The circuit breaker according to claim 1, characterized in that The circuit breaker further comprises a second micro switch, and the lever is further used to turn on or off the second micro switch; When the circuit breaker is in an open state, the boss contacts the rotating rod, and the lever presses the second microswitch to turn on the second microswitch; when the circuit breaker is switched from an open state to a closed state, the operating mechanism drives the main shaft to rotate in a second direction, so that the lever moves in a direction away from the second microswitch, and the rotating rod rotates toward the static contact, so that before the moving contact contacts the static contact, the second microswitch is disconnected and switches from sending a third signal to sending a fourth signal, and the third signal is different from the fourth signal; wherein the second direction is opposite to the first direction.

5. The circuit breaker according to claim 4, characterized in that When the circuit breaker switches from an open state to a closed state, after the moving contact contacts the stationary contact, the main shaft continues to rotate along the second direction, so that the boss is separated from the rotating rod and spaced apart by the set distance.

6. The circuit breaker according to claim 4 or 5, characterized in that: 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 relatively fixed to the housing, the second moving contact is slidably connected to the second fixed plate, the second static contact and the second spring are respectively located on a side of the second moving contact away from the lever, the second static contact is relatively fixed to the second fixed plate, one end of the second spring is relatively fixed to the second moving contact, and the other end is relatively fixed to the second fixed plate; The lever 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 contacts the second static contact, so that the second micro switch is turned on; the lever 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 separates from the second static contact, so that the second micro switch is turned off.

7. The circuit breaker according to claim 6, characterized in that A second limiting rib is disposed at one end of the second fixing plate close to the shifting rod, and the second limiting rib is used to limit the position of the second moving contact relative to the second fixing plate after the second micro switch is disconnected.

8. The circuit breaker according to claim 4, characterized in that The moving contact assembly also includes a third spring, one end of which is connected to the rotating rod, and the other end of which is connected to the main shaft; the third spring is used to keep the rotating rod in contact with the boss so that the rotating rod and the main shaft are relatively fixed.

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

10. The circuit breaker according to claim 9, characterized in that A baffle is provided in the housing, the baffle is located between the moving contact assembly and the operating mechanism, and extends along the height direction of the circuit breaker; the baffle is provided with an opening, the lever passes through the opening, the first micro switch and the second micro switch are located on a side of the baffle close to the operating mechanism, and are relatively arranged on both sides of the opening.

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

12. The electric power device according to claim 11, characterized in that The circuit breaker also includes a second micro switch, which is used to send 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 when the third signal is switched to the fourth signal, adjust the voltage of the power supply supplied to the multiple power modules by the power supply.

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