Switching device and power supply system
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LIANGXIN ELECTRICAL CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-16
Smart Images
Figure CN224366713U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of switchgear technology, and more specifically, to a switchgear device and a power supply system. Background Technology
[0002] In the field of switchgear technology, the insufficient breaking capacity of traditional disconnecting switches is a key challenge restricting equipment reliability. In existing technologies, traditional rotary disconnecting switches often fail to meet international standard certifications such as PV2 and UL due to design flaws in their arc-extinguishing structure, leading to continuous arcing during contact breaking. This not only shortens contact life but also makes it difficult to meet high-specification breaking capacity requirements. When abnormal conditions such as overload or short circuit occur, traditional disconnecting switches cannot quickly cut off the circuit, potentially causing safety accidents such as contact welding and insulation breakdown. This problem of insufficient breaking capacity is particularly prominent in scenarios requiring frequent switching of large currents, such as photovoltaic inverters and energy storage systems. Utility Model Content
[0003] The purpose of this application is to provide a switching device and a power supply system that can improve the breaking capacity of the switching device and enhance the safety of the power supply system.
[0004] The embodiments of this application are implemented as follows:
[0005] A first aspect of this application provides a switching device, including a main switching unit and a precharge switching unit tractively connected to the main switching unit. The main switching unit is connected in a main circuit, and the precharge switching unit is connected in a precharge circuit. The main switching unit includes a tripping mechanism. When the tripping mechanism trips, the main switching unit can drive the precharge switching unit to open, thereby disconnecting the main circuit and the precharge circuit. This switching device improves the breaking capacity of the switching device and enhances the safety of the power supply system.
[0006] As one possible implementation, when the tripping mechanism trips, it is driven to re-tighten, and the main switch unit can drive the precharge switch unit to close, so that the precharge circuit is turned on.
[0007] In one possible implementation, the main switch unit is driven to close, thereby driving the precharge switch unit to open, so that the main circuit is turned on and the precharge circuit is disconnected.
[0008] In one possible implementation, the main switch unit is driven to open, thereby driving the precharge switch unit to close, so that the main circuit is disconnected and the precharge circuit is turned on.
[0009] As one possible implementation, a linkage mechanism is also included. The main switch unit is connected to the precharge switch unit through the linkage mechanism, so that the main switch unit can drive the linkage mechanism to move and cause the precharge switch unit to operate.
[0010] As one possible implementation, it also includes a controller and a trip unit, the controller being electrically connected to the trip unit, the controller being used to send a trip signal, and the trip unit being used to remotely trip in response to the trip signal, driving the trip mechanism to trip, so as to disconnect the main circuit.
[0011] In one possible implementation, the main switch unit includes a first housing and a first toggle member. One end of the first toggle member is connected to the tripping mechanism located inside the first housing, and the other end protrudes outside the first housing. The precharge switch unit includes a second housing and a second toggle member. The second toggle member is connected to the contact mechanism located inside the second housing, and the other end protrudes outside the second housing. The first housing and the second housing are arranged side by side, and the rotation center axes of the first toggle member and the second toggle member are parallel.
[0012] In one possible implementation, the tripping mechanism trips, driving the first toggle member to move to a first position, and driving the second toggle member to move to a second position; the first toggle member is driven to move to a third position, driving the tripping mechanism to re-tighten, and driving the second toggle member to move to a fourth position; when the first toggle member is driven to move to a fifth position and drives the second toggle member to move to a second position, the main switch unit closes.
[0013] In one possible implementation, the first actuating member is rotatably mounted on the tripping mechanism. When the first actuating member is in the first position, the third position, and the fifth position, there are three different included angles between the first actuating member and the first housing. The second actuating member is rotatably mounted on the contact mechanism. When the second actuating member is in the second position and the fourth position, there are two different included angles between the second actuating member and the second housing.
[0014] As one possible implementation, when the tripping mechanism is in the re-tightening state, the tripping mechanism is a four-bar linkage; when the tripping mechanism is in the tripping state, the tripping mechanism is a five-bar linkage.
[0015] A second aspect of this application provides a power supply system including an input module, an output module, and the aforementioned switching device connected between the input module and the output module. When the main circuit and the precharge circuit are disconnected, the input module is disconnected from the output module. This switching device enhances the breaking capacity of the switching device, thereby improving the safety of the power supply system.
[0016] The beneficial effects of the embodiments of this application include:
[0017] This switching device includes a main switching unit and a pre-charge switching unit driven by the main switching unit. The main switching unit is connected in the main circuit, and the pre-charge switching unit is connected in the pre-charge circuit. The main switching unit contains a tripping mechanism. When the tripping mechanism trips, the main switching unit drives the pre-charge switching unit to open, thus disconnecting the main circuit and the pre-charge circuit. This switching device, through the coordinated breaking design of the main switching unit and the pre-charge switching unit, utilizes the triggering logic of the tripping mechanism to simultaneously disconnect the main circuit and the pre-charge circuit. This improves the ability to interrupt large currents and complex faults, and enhances the safety and reliability of the power supply system through rapid response and structural simplification. It is suitable for power electronic equipment and power supply scenarios with high breaking performance requirements. Attached Figure Description
[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is one of the state diagrams of the switching device provided in the embodiments of this application;
[0020] Figure 2 for Figure 1 The corresponding circuit diagram;
[0021] Figure 3 This is a second schematic diagram of the state of the switching device provided in the embodiments of this application;
[0022] Figure 4 for Figure 3 The corresponding circuit diagram;
[0023] Figure 5 This is the third schematic diagram of the state of the switching device provided in the embodiments of this application;
[0024] Figure 6 for Figure 5 The corresponding circuit diagram.
[0025] Icons: 100-Switch device; 10-Main switch unit; 11-First housing; 12-First toggle element; 20-Pre-charge switch unit; 21-Second housing; 22-Second toggle element; 30-Linkage mechanism. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0028] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0029] Please refer to the reference. Figures 1 to 6This application provides a switching device 100, including a main switching unit 10 and a precharge switching unit 20 drivenly connected to the main switching unit 10. The main switching unit 10 is connected in the main circuit, and the precharge switching unit 20 is connected in the precharge circuit. The main switching unit 10 is provided with a tripping mechanism. When the tripping mechanism trips, the main switching unit 10 can drive the precharge switching unit 20 to open, thereby disconnecting the main circuit and the precharge circuit. This switching device 100 can improve the breaking capacity of the switching device 100 and enhance the safety of the power supply system.
[0030] It should be noted that, as Figure 1 and Figure 2 As shown, the switching device 100 includes a main switching unit 10 and a pre-charge switching unit 20. The main switching unit 10 is connected in the main circuit and is used to control the on / off state of the main circuit. The pre-charge switching unit 20 is drivenly connected to the main switching unit 10 to ensure that the action of the main switching unit 10 can directly drive the action of the pre-charge switching unit 20. The pre-charge switching unit 20 is connected in the pre-charge circuit and is used to control the on / off state of the pre-charge circuit. The pre-charge circuit is used to pre-charge energy storage components such as capacitors before the main circuit is turned on, so as to avoid generating excessive inrush current when the main circuit is turned on.
[0031] A tripping mechanism is provided within the main switch unit 10. When the tripping mechanism trips (e.g., due to overload, short circuit, or other faults causing the current to exceed a threshold), the main switch unit 10 first trips to disconnect the main circuit. Simultaneously, the tripping action of the main switch unit 10 drives the pre-charge switch unit 20 to trip, thus disconnecting the pre-charge circuit as well. The switchgear 100 provided in this application, through the coordinated tripping of the main switch unit 10 and the pre-charge switch unit 20, can simultaneously disconnect the main circuit and the pre-charge circuit, avoiding arc reignition or energy residue caused by incomplete disconnection of a single circuit during a fault. For example, when a short circuit occurs in the main circuit, the tripping mechanism trips first, the main switch unit 10 disconnects the large current in the main circuit, and the pre-charge switch unit 20 simultaneously disconnects the pre-charge circuit. This avoids the pre-charge circuit remaining connected when the main circuit is disconnected, preventing energy storage components (such as capacitors) from reversing charge into the main circuit, reducing the current surge at the moment of disconnection, further reducing the difficulty of disconnection, improving the overall disconnection capacity, thereby protecting the switch contacts and circuit components, and effectively extending the equipment life.
[0032] After the tripping mechanism is triggered, the main switch unit 10 and the precharge switch unit 20 operate synchronously, with a short breaking time (typically in the millisecond range). This allows for rapid isolation of the fault source, reducing the duration of the fault and minimizing the impact on other equipment in the power supply system. For example, in power electronic equipment, when a short-circuit fault occurs, the synchronized breaking can effectively prevent overheating or insulation damage. Furthermore, for systems that simultaneously include a main circuit and a precharge circuit (such as frequency converters and new energy power sources), this design ensures that the main circuit and the precharge circuit disconnect synchronously during a fault, preventing the main switch unit 10 from failing to break due to the precharge circuit not being disconnected. For example, in a battery energy storage system, the main switch unit 10 controls the battery pack's connection to the grid, and the precharge switch unit 20 controls the precharge resistor's connection. Synchronized breaking during a fault can prevent continuous release of battery energy through the precharge circuit, improving system reliability.
[0033] As one possible implementation, when the tripping mechanism trips, it is driven to re-tighten, and the main switch unit 10 can drive the precharge switch unit 20 to close, so that the precharge circuit is turned on.
[0034] It should be noted that, as Figure 3 and Figure 4 As shown, when the tripping mechanism is triggered to trip due to a fault, if the fault is cleared, the tripping mechanism can be manually or electrically driven to "re-trigger" (i.e., return to the initial ready-to-close state). At this time, the tripping mechanism releases the lock on the main switch unit 10, allowing the main switch unit 10 to perform a closing operation. When the tripping mechanism is driven to re-trigger, the main switch unit 10 can drive the pre-charge switch unit 20 to close synchronously. After the pre-charge switch unit 20 closes, the pre-charge circuit is turned on, and pre-charging of the energy storage element (such as a capacitor) begins, preparing for the subsequent closing of the main circuit.
[0035] Before the main switch unit 10 closes, the pre-charge switch unit 20 first conducts the pre-charge circuit. This avoids the surge current generated by the energy storage components (such as the large current impact caused by the instantaneous charging of the capacitor) when the main circuit is directly closed. For example, when the frequency converter starts, the pre-charge circuit first charges the DC bus capacitor through a small resistor. After the capacitor voltage stabilizes, the main switch unit 10 closes the main power supply. This significantly reduces the current surge experienced by the contacts of the main switch unit 10 when closing (because the energy storage components have completed pre-charging, and the main circuit current tends to stabilize). This reduces arc erosion and heat loss at the contacts, thereby preventing damage to power devices (such as IGBTs) from large currents and extending the service life of the main switch unit 10 and the pre-charge switch unit 20. After the tripping mechanism re-clamps, the linkage closing logic of the main switch unit 10 and the pre-charge switch unit 20 ensures that the system restarts following the standard procedure of the pre-charge circuit being connected first and the main circuit being connected later. This avoids equipment damage caused by human error or chaotic control logic and improves the reliability of system restart.
[0036] As one possible implementation, under certain operating conditions, the main switch unit 10 is driven to close, driving the precharge switch unit 20 to open, thereby connecting the main circuit and disconnecting the precharge circuit. For example, when the tripping mechanism re-clamps, the main switch unit 10 is driven to close, driving the precharge switch unit 20 to open, thereby connecting the main circuit and disconnecting the precharge circuit.
[0037] It should be noted that, as Figure 5 and Figure 6 As shown, when the tripping mechanism is triggered by a fault and the fault is cleared, it can be manually or electrically driven to "re-trigger" (i.e., return to the initial ready-to-close state). At this time, the main switch unit 10 is driven to close (e.g., manually or electrically), the main circuit is connected, and the system enters normal operation. When the main switch unit 10 is driven to close, it can drive the pre-charge switch unit 20 to open synchronously. After the pre-charge switch unit 20 opens, the pre-charge circuit is disconnected, and the energy storage element (e.g., capacitor) is no longer charged through the pre-charge circuit. The main circuit independently undertakes the current transmission function.
[0038] The precharge circuit typically includes a current-limiting resistor (used to suppress inrush current). If it remains continuously connected, it will cause power loss (such as resistor heating). Synchronously disconnecting the precharge circuit after the main switch unit 10 closes eliminates the energy consumption of the precharge resistor, improving system operating efficiency. For example, in a battery energy storage system, continuous operation of the precharge circuit resistor leads to energy waste. After the precharge switch unit 20 is disconnected, the precharge circuit is completely isolated from the main circuit, solving the above problem. Simultaneously, it prevents precharge circuit components (such as resistors and contacts) from aging or being damaged due to prolonged energization, reducing the risk of system failure. For example, if the precharge resistor is continuously connected to the main circuit, it may experience insulation breakdown due to overheating. Disconnecting the precharge circuit ensures the independence and safety of the main circuit.
[0039] After the pre-charge circuit is disconnected, the main circuit current is not affected by the pre-charge circuit components (such as capacitors and resistors), resulting in more stable current transmission characteristics. For example, in a frequency converter, if the pre-charge circuit is not disconnected after the main circuit is turned on, the charging and discharging of the capacitor may cause fluctuations in the main circuit current. After disconnection, the stability of the frequency converter's output current can be guaranteed. In addition, when the main circuit is operating normally, the pre-charge circuit is in an open state. If a fault occurs in the pre-charge circuit (such as a resistor short circuit), it will not affect the normal operation of the main circuit, facilitating rapid fault location and isolation, and improving system reliability.
[0040] As one possible implementation, under certain operating conditions, the main switch unit 10 is driven to open, driving the precharge switch unit 20 to close, thereby disconnecting the main circuit and connecting the precharge circuit. For example, when the main switch unit 10 closes, the main switch unit 10 is driven to open, driving the precharge switch unit 20 to close, thereby disconnecting the main circuit and connecting the precharge circuit.
[0041] It should be noted that, as Figure 3 and Figure 4 As shown, when the main switch unit 10 is in the closed state (main circuit is conducting), if it is triggered by a control command (such as normal shutdown or maintenance requirements) or a fault signal to open due to a driving force (such as manual operation or electric operating mechanism), the main switch unit 10 begins to disconnect the main circuit. At the same time, the opening action of the main switch can drive the pre-charge switch unit 20 to close, making the pre-charge circuit conduct, and the energy storage element (such as a capacitor) begins to charge through the pre-charge resistor, preparing for the subsequent closing of the main circuit.
[0042] After the main circuit is disconnected, the pre-charge circuit is activated, keeping the energy storage elements in a pre-charge state. This maintains the voltage of the energy storage elements (such as capacitors), preventing energy waste caused by rapid capacitor discharge or the impact of high current during equipment restart. For example, when the inverter is shut down, keeping the pre-charge circuit active allows the DC bus capacitor to maintain a certain voltage. When the equipment restarts shortly, there is no need to recharge before closing the main switch unit 10, shortening the startup time. If the system requires maintenance, the pre-charge circuit, activated after the main circuit is disconnected, can dissipate the residual energy of the energy storage elements (or maintain a low-power charging state) through the pre-charge resistor, preventing the risk of electric shock to maintenance personnel from residual high voltage in the capacitors. For example, before maintenance of power electronic equipment, the activation of the pre-charge circuit allows the capacitor voltage to slowly decrease to a safe range, improving maintenance safety.
[0043] As one possible implementation, the switching device 100 also includes a linkage mechanism 30. The main switching unit 10 is connected to the precharge switching unit 20 through the linkage mechanism 30, so that the main switching unit 10 can drive the linkage mechanism 30 to move and drive the precharge switching unit 20 to operate.
[0044] It should be noted that the linkage mechanism 30 is the mechanical transmission bridge between the main switch unit 10 and the precharge switch unit 20, and is typically composed of mechanical components such as connecting rods, gears, cams, and levers. The linkage mechanism 30 can be flexibly designed according to the installation position and direction of movement (e.g., direct-acting or rotary) of the main switch unit 10 and the precharge switch unit 20. For example, when the main switch unit 10 has a direct-acting contact and the precharge switch unit 20 has a rotary contact, the motion conversion can be achieved through a cam-lever mechanism; or, when the main switch unit 10 has a direct-acting contact and the precharge switch unit 20 has a direct-acting contact, the motion conversion can be achieved through a rack and pinion mechanism.
[0045] The moving contact or operating mechanism of the main switch unit 10 is rigidly fixed to the linkage mechanism 30, and the moving contact or operating lever of the precharge switch unit 20 is also connected to the other end of the linkage mechanism 30. When the main switch unit 10 operates (opens or closes), the driving force is transmitted to the precharge switch unit 20 through the linkage mechanism 30. The rigid connection of the mechanical transmission can control the time difference between the operation of the main switch unit 10 and the precharge switch unit 20 to the millisecond level, avoiding asynchronous operation caused by electrical signal transmission delay. For example, if the precharge switch unit 20 delays closing when the main switch unit 10 opens, it may cause the energy storage element to be reverse-charged. The mechanical linkage can ensure that the two operate almost synchronously, eliminating this risk.
[0046] The mechanical transmission enables synchronized disconnection, eliminating the need for additional control circuits or sensors, thus reducing the number of components and costs. It also lowers the risk of failure due to electronic control malfunctions, improving system compatibility and maintenance convenience. Similarly, the mechanical transmission enables synchronized closing, eliminating the need for additional control buttons or circuits for the pre-charge switch. Operators only need to control the opening and closing of the main switch unit 10 to automatically switch the pre-charge circuit on and off, simplifying the operation process. For example, in a distribution cabinet, maintenance personnel only need to operate the handle or push rod of the main switch unit 10, and the pre-charge switch unit 20 will operate synchronously, reducing operational complexity.
[0047] In one possible implementation, the switching device 100 further includes a controller and a trip unit. The controller is electrically connected to the trip unit. The controller is used to send a trip signal, and the trip unit is used to remotely trip in response to the trip signal, driving the trip mechanism to trip so that the main circuit is disconnected.
[0048] It should be noted that the controller and the trip unit are connected via electrical wiring (such as cables or terminals). The controller's built-in logic circuits or processor can monitor the system status (such as parameters like current, voltage, and temperature) in real time. When a fault signal (such as short-circuit current, overload current, or overtemperature) is detected or a remote control command (such as a trip signal from a host computer or PLC) is received, the controller sends an electrical signal (i.e., a trip signal) to the trip unit, driving the trip mechanism to complete the tripping action.
[0049] For example, when the tripping mechanism is in the re-tethered state, the tripping and locking parts of the tripping mechanism are engaged. At this time, the tripping mechanism is a four-bar linkage mechanism, and the moving and stationary contacts of the main switch unit 10 can open and close. When the trip unit receives the tripping signal, it can push the tripping and locking parts of the tripping mechanism to unlock, and the tripping mechanism is in the disengaged state. At this time, the tripping mechanism is a five-bar linkage mechanism, and the moving and stationary contacts of the main switch unit 10 are open, and closing operation is not possible.
[0050] The controller can receive remote communication signals to achieve remote tripping control of the switchgear 100. For example, in substations and new energy power plants, maintenance personnel can remotely operate the tripping mechanism through the monitoring system, eliminating the need for manual on-site tripping and improving management efficiency and safety. Furthermore, the controller can monitor electrical parameters in real time. When the current exceeds a set threshold (e.g., a short-circuit current of 10 times the rated current), it automatically issues a tripping signal without manual intervention. The tripping time is down to the millisecond level, quickly isolating the fault source and preventing the fault from escalating. For example, in industrial production lines, when a short-circuit fault occurs, the controller triggering tripping can prevent equipment damage and production stoppage losses. In addition, the controller can integrate multiple protection logics such as overcurrent protection, short-circuit protection, undervoltage protection, and overtemperature protection, with different protection thresholds and delay times set via software. For example, for motor loads, long-delay overload tripping (e.g., tripping after 10 minutes at 1.2 times the rated current) and instantaneous short-circuit tripping (e.g., immediate tripping at 10 times the rated current) can be set to achieve precise protection.
[0051] As one possible implementation method, such as Figures 1 to 6 As shown, the main switch unit 10 includes a first housing 11 and a first toggle member 12. One end of the first toggle member 12 is connected to a tripping mechanism located inside the first housing 11, and the other end protrudes outside the first housing 11. The precharge switch unit 20 includes a second housing 21 and a second toggle member 22. The second toggle member 22 is connected to a contact mechanism located inside the second housing 21, and the other end protrudes outside the second housing 21. The first housing 11 and the second housing 21 are arranged side by side, and the rotation center axes of the first toggle member 12 and the second toggle member 22 are parallel.
[0052] It should be noted that the main switch unit 10 includes a first housing 11, which integrates core components such as a tripping mechanism, moving contact, stationary contact, and arc extinguishing system. One end of the first actuating member 12 is connected to the tripping mechanism located inside the first housing 11, and the other end protrudes outside the first housing 11. It is used to manually operate the opening and closing of the main switch (such as a handle or knob). Its movement trajectory can be designed according to actual needs, and no specific restrictions are imposed here. The precharge switch unit 20 includes a second housing 21, which usually contains a simple contact mechanism (without a tripping mechanism). The second actuating member 22 is connected to the contact mechanism located inside the second housing 21, and the other end protrudes outside the second housing 21. It is used to manually operate the opening and closing of the precharge switch unit 20. The structure of the second actuating member 22 can be similar to that of the first actuating member 12.
[0053] The first housing 11 and the second housing 21 are arranged side-by-side in a horizontal or vertical direction, with their axes or main planes parallel to each other, forming a compact overall structure. For example, defining the closing direction as upward, the second housing 21 can be located to the left, right, front, rear, or below the first housing 11. The side-by-side arrangement of the first housing 11 and the second housing 21 saves installation space in the horizontal or vertical direction, making it particularly suitable for scenarios where installation dimensions are sensitive, such as distribution boxes and control cabinets. Furthermore, the first housing 11 and the second housing 21 can be produced as independent modules, and can be quickly assembled using fasteners (such as guide rails and bolts), facilitating mass production and on-site installation.
[0054] The rotational axes of the first actuating element 12 and the second actuating element 22 are parallel to each other. For example, if the first actuating element 12 is a handle that moves back and forth in the horizontal direction, the second actuating element 22 also moves back and forth in the horizontal direction, and their rotational axes are parallel. The operator only needs to move the actuating element in the same direction (such as horizontally back and forth) to complete the operation of the main switch unit 10 and the precharge switch unit 20, without having to adapt to different directional movements, thus reducing the risk of misoperation.
[0055] Since the first housing 11 and the second housing 21 are arranged side by side, and the rotation center axes of the first actuating member 12 and the second actuating member 22 are parallel, the linkage mechanism 30 can be designed as a linear or simple parallel transmission structure, eliminating the need for complex steering or speed-changing mechanisms. For example, the motion of the first actuating member 12 can be transmitted to the second actuating member 22 through a connecting rod parallel to the actuation direction, resulting in high transmission efficiency and low wear. The short transmission path reduces the number of mechanical parts (such as reducing couplings and steering gears), lowering the risk of linkage failure due to component wear or loosening. For example, traditional cross-drive may cause action delays due to gear backlash, while the linkage structure of parallel drive has smaller backlash and better action synchronization.
[0056] As one possible implementation method, such as Figures 1 to 6 As shown, the tripping mechanism triggers the tripping, driving the first actuating member 12 to move to the first position, and driving the second actuating member 22 to move to the second position. At this time, the main switch unit 10 cuts off the main circuit, and the precharge switch unit 20 trips simultaneously. The first actuating member 12 is driven to move to the third position, driving the tripping mechanism to re-tighten, preparing for the subsequent closing of the main switch unit 10. At the same time, it also drives the second actuating member 22 to move to the fourth position, so that the precharge circuit is turned on first. When the first actuating member 12 is driven to move to the fifth position and drives the second actuating member 22 to move to the second position, the main switch unit 10 closes, the main circuit is turned on, and the precharge switch unit 20 trips simultaneously, cutting off the precharge circuit.
[0057] The different positions of the first actuating element 12 (i.e., the first position, the third position, and the fifth position) and the different positions of the second actuating element 22 (i.e., the second position and the fourth position) can intuitively display the status of the tripping mechanism through scales, colors, or text markings. Operators can determine whether the switch device 100 is in a closeable state without opening the housing, reducing misjudgments. Operators can switch between the different states of tripping, re-tripping, and closing simply by switching the position of the first actuating element 12, without the need for additional tools or complicated procedures.
[0058] As one possible implementation method, such as Figures 1 to 6 As shown, the first actuating member 12 is rotatably mounted on the tripping mechanism. When the first actuating member 12 is in the first position, the third position, and the fifth position, there are three different included angles between the first actuating member 12 and the first housing 11. The second actuating member 22 is rotatably mounted on the contact mechanism. When the second actuating member 22 is in the second position and the fourth position, there are two different included angles between the second actuating member 22 and the second housing 21.
[0059] By defining the position state through the rotation angle of the actuating element, mechanical motion is transformed into quantifiable angular parameters, optimizing operational precision, space efficiency, and ergonomics. The rotary actuating element only needs to rotate around its axis, occupying less radial space. Compared to linear actuating elements, it is more suitable for scenarios requiring compact installation and high operational precision (such as compact distribution cabinets and marine electrical equipment). Through angle limiting and transmission ratio design, reliable switching actions for tripping, re-tripping, and closing are ensured.
[0060] This application also provides a power supply system, including an input module, an output module, and the aforementioned switching device 100 connected between the input module and the output module. When the main circuit and the precharge circuit are disconnected, the input module is disconnected from the output module. Since the structure and beneficial effects of the switching device 100 have been described in detail in the foregoing embodiments, they will not be repeated here.
[0061] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
[0062] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.
Claims
1. A switching device, characterized in that, It includes a main switch unit (10) and a precharge switch unit (20) that is drivenly connected to the main switch unit (10). The main switch unit (10) is connected in the main circuit, and the precharge switch unit (20) is connected in the precharge circuit. The main switch unit (10) is provided with a tripping mechanism. When the tripping mechanism trips, the main switch unit (10) can drive the precharge switch unit (20) to open, so that the main circuit and the precharge circuit are disconnected.
2. The switching device according to claim 1, characterized in that, When the tripping mechanism trips, it is driven to re-trap, and the main switch unit (10) can drive the precharge switch unit (20) to close, so that the precharge circuit is turned on.
3. The switching device according to claim 1, characterized in that, The main switch unit (10) is driven to close, driving the precharge switch unit (20) to open, so that the main circuit is turned on and the precharge circuit is turned off.
4. The switching device according to claim 1, characterized in that, The main switch unit (10) is driven to open, driving the precharge switch unit (20) to close, so that the main circuit is disconnected and the precharge circuit is turned on.
5. The switching device according to claim 1, characterized in that, It also includes a linkage mechanism (30), through which the main switch unit (10) is connected to the precharge switch unit (20) so that the main switch unit (10) can drive the linkage mechanism (30) to move and drive the precharge switch unit (20) to move.
6. The switching device according to any one of claims 1 to 5, characterized in that, It also includes a controller and a trip unit, the controller being electrically connected to the trip unit, the controller being used to send a trip signal, and the trip unit being used to remotely trip in response to the trip signal, driving the trip mechanism to trip, so as to disconnect the main circuit.
7. The switching device according to claim 1, characterized in that, The main switch unit (10) includes a first housing (11) and a first toggle member (12). One end of the first toggle member (12) is connected to the tripping mechanism located in the first housing (11). The precharge switch unit (20) includes a second housing (21) and a second toggle member (22). The second toggle member (22) is connected to the contact mechanism located in the second housing (21). The first housing (11) and the second housing (21) are arranged side by side. The rotation center axes of the first toggle member (12) and the second toggle member (22) are parallel.
8. The switching device according to claim 7, characterized in that, The tripping mechanism trips, driving the first toggle member (12) to move to the first position, and driving the second toggle member (22) to move to the second position; the first toggle member (12) is driven to move to the third position, driving the tripping mechanism to re-tighten, and driving the second toggle member (22) to move to the fourth position; when the first toggle member (12) is driven to move to the fifth position and drives the second toggle member (22) to move to the second position, the main switch unit (10) closes.
9. The switching device according to claim 8, characterized in that, The first actuating member (12) is rotatably mounted on the tripping mechanism. When the first actuating member (12) is in the first position, the third position, and the fifth position, there are three different included angles between the first actuating member (12) and the first housing (11). The second actuating member (22) is rotatably mounted on the contact mechanism. When the second actuating member (22) is in the second position and the fourth position, there are two different included angles between the second actuating member (22) and the second housing (21).
10. The switching device according to claim 1, characterized in that, When the release mechanism is in the re-locked state, the release mechanism is a four-bar linkage; when the release mechanism is in the released state, the release mechanism is a five-bar linkage.
11. A power supply system, characterized in that, The device includes an input module, an output module, and a switching device (100) according to any one of claims 1 to 10 connected between the input module and the output module. When the main circuit and the precharge circuit are disconnected, the input module is disconnected from the output module.