Switch apparatus and inverter

Abstract

A switch apparatus (30) and an inverter. The switch apparatus comprises a housing (35), an operating handle (31), an operating mechanism (32), a moving contact (331), a static contact, and a first trip device (34). A traction rod (321) and a locking rod (323) separately rotate relative to the housing. The traction rod is transmittingly connected to the operating mechanism. The traction rod has a first surface (S1) and a second surface (S2) adjacent to each other. When the traction rod is located at a first position, a latch lever (322) is engaged with a trip latch (HE). When the traction rod is located at a second position, the latch lever is disengaged from the trip latch. On the basis of a driving signal, the first trip device is used for driving the traction rod to rotate from the first position to the second position, and at the same time, one end of the locking rod slides from the first surface to the second surface to lock the rotation direction of the traction rod, thereby keeping the latch lever disengaged from the trip latch. Thus, the operating handle is disengaged from the operating mechanism, failing to drive the moving contact to move, so that the switch apparatus cannot be closed, thereby improving the stability of the switch apparatus in a tripped state.

Description

A switching device and an inverter

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411049653.9, filed on July 31, 2024, entitled "A Switching Device and Inverter", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of power technology, and in particular to a switching device and an inverter. Background Technology

[0004] With the advent of electricity, switching devices play a vital role in many production processes and technical equipment. In power systems, switching devices are used for the distribution, control, and protection of electrical energy. Taking rotary disconnect switches as an example, rotary disconnect switches are a commonly used switching device in circuits. In the field of photovoltaic power generation, rotary disconnect switches typically consist of an operating mechanism, a multi-pole switching unit, and a remote trip unit.

[0005] In photovoltaic (PV) power generation scenarios, multiple PV panel conductors are connected to the input terminals of multiple controllable DC switches (hereinafter referred to as "switches"). Due to limitations in conductor length, quantity, and site conditions, external faults are unavoidable in practice. Additionally, internal inverter faults may also occur. In such cases, the switch disconnects under the influence of a fault current signal. The controller needs to detect the fault and, upon confirmation, automatically disconnect the switch via a magnetic flux integrated into it to ensure line safety.

[0006] However, in practical applications, users may not be able to determine the reason for the switch tripping, and may perform manual tripping and reclosing operations multiple times while the fault current signal is still present, which can easily lead to switch failure. Summary of the Invention

[0007] This application provides a switching device and an inverter, which keeps the operating handle of the switching device in a disengaged state from the operating mechanism in the event of a fault, so that the switching device cannot be closed, thereby improving the stability of the switching device in the tripping state.

[0008] In a first aspect, this application provides a switching device. The switching device includes a housing, an operating handle, an operating mechanism, a moving contact, a stationary contact, and a first trip unit. Specifically, the operating handle is connected to the operating mechanism. The operating mechanism is connected to the moving contact. At least the portion of the operating handle near the operating mechanism, the operating mechanism, the moving contact, the stationary contact, and the first trip unit are located within the housing. The operating mechanism includes a locking assembly and a transmission assembly. The operating handle and the moving contact are respectively drivenly connected to the transmission assembly. The transmission assembly includes a trip latch and a rocker arm, and the locking assembly includes a pull rod, a locking rod, and a locking rod. The trip latch, rocker arm, pull rod, locking rod, and locking rod rotate relative to the housing. The trip latch is drivenly connected to the rocker arm, and the operating handle and the moving contact are respectively drivenly connected to the rocker arm. One end of the locking rod extends to the outer periphery of the pull rod and is used to contact the pull rod. The outer surface of the pull rod near the locking rod includes adjacent first and second surfaces, and the distance from the first surface to the rotation center of the pull rod is greater than the distance from the second surface to the rotation center of the pull rod. When the traction rod is in the first position, one end of the locking rod contacts the first surface, and the third surface of the traction rod abuts against the locking rod, keeping the locking rod engaged with the jump catch. This allows the operating handle to control the operating mechanism to move the moving contact, thereby causing the moving contact to contact or separate from the stationary contact. When the traction rod is in the second position, one end of the locking rod contacts the second surface, and the fourth surface of the traction rod abuts against the locking rod, disengaging the locking rod from the jump catch. This disengages the operating handle from the transmission assembly, preventing the operating handle from controlling the operating mechanism to move the moving contact, and keeping the moving contact separated from the stationary contact. The first trip unit includes a drive component. The first trip unit is used to drive the traction rod from the first position to the second position according to a drive signal, and to rotate the locking rod in a first rotation direction, so that one end of the locking rod slides from the first surface to the second surface and is confined to the second surface, thereby disengaging the locking rod from the jump catch and keeping it in a disengaged state. The rocker arm is provided with a reset drive unit. The reset drive unit is used to drive the drive component to reset when the operating handle drives the rocker arm to rotate in a direction close to the first trip unit.

[0009] The switching device of this application can be applied in an inverter to connect or disconnect the inverter circuit and the photovoltaic module. When a fault occurs inside or outside the inverter, the inverter controller can send a drive signal to the switching device, causing the switching device to trip. At this time, inside the switching device, the first trip unit drives the traction rod to rotate from the first position to the second position, causing the locking rod to disengage from the trip latch of the transmission assembly, thereby disengaging the transmission assembly from the operating handle and separating the moving contact and the stationary contact. In this way, the switching device remains in the tripped state, and the operating handle cannot control the operating mechanism to drive the moving contact to move, thus keeping the moving contact and the stationary contact separated. Specifically, after the locking rod slides from the first surface to the second surface, since the distance from the first surface to the rotation center of the traction rod is greater than the distance from the second surface to the rotation center, a step is formed between the first surface and the second surface. When the aforementioned end of the locking rod is located on the second surface, if the traction rod rotates from the second position to the first position, the aforementioned end of the locking rod has a relative tendency to move from the second surface toward the first surface relative to the traction rod. However, the step between the first and second surfaces prevents this relative sliding tendency from being realized, thus preventing the traction rod from resetting to the first position and remaining in the second position. As a result, the switchgear remains in a tripped state. Therefore, even if the operating handle is operated when a fault is detected, the first trip unit will still disengage the locking rod from the trip latch, preventing the operating mechanism from moving the moving contact and thus preventing the switchgear from closing, thereby improving the stability of the switchgear in the tripped state. Furthermore, when maintenance personnel require debugging or believe the fault has been resolved, external force can be used to drive the operating handle, causing the rocker arm to reset the first trip unit and rotate the trip latch to engage with the locking rod. During the rotation of the traction rod from the first position to the second position, the locking rod slides from the third surface of the traction rod to the fourth surface.

[0010] In this application, the above solution mainly addresses situations where external faults occur in the inverter. Maintenance personnel need to unlock the locking lever to reset the drive component of the first trip unit, and then manually close the circuit breaker via the operating handle. This improves the maintenance personnel's awareness, allowing them to confirm that the fault has been resolved before releasing the locking lever's limit; otherwise, the locking lever will remain disengaged from the trip lever and cannot be closed via the operating handle. In this application, external faults in the inverter may be caused by external environmental faults, such as reverse connection of photovoltaic modules. These external faults can be checked and resolved by the user or the system. Faults caused by external environmental faults may be detected through internal inverter wiring or through external wiring or wiring at the input interface; all are considered external faults in this application.

[0011] Of course, in other possible embodiments, the above implementation method can also be used in the event of an internal inverter fault.

[0012] After user debugging or fault resolution, the first trip unit is reset, and the trip lever re-engages with the locking lever. Specifically, when the locking lever rotates in the second rotation direction, one end of the locking lever disengages from the traction rod, allowing the traction rod to return from the second position to the first position. This enables the reset drive unit to drive the drive component to reset, so that the locking lever engages with the trip lever when the operating handle moves the operating mechanism. The first rotation direction is opposite to the second rotation direction. Therefore, after fault resolution, by driving the locking lever to rotate in the second rotation direction, the traction rod can be reset, and the trip lever can engage with the locking lever, thus switching the switchgear from the tripped state to the open state. The switchgear can then be closed and opened again via the operating handle.

[0013] In the aforementioned switching device, when one end of the locking lever disengages from the traction rod, the operating handle is rotated to drive the rocker arm to rotate, thereby causing the reset drive unit to reset the drive component and causing the trip latch to rotate toward the locking rod and engage with it. In other words, by driving the operating handle to rotate, the reset of the first trip unit and the engagement of the trip latch with the locking rod can be achieved simultaneously.

[0014] In one possible implementation, the locking lever is equipped with a reset button, which drives the locking lever to rotate in a second rotation direction. The housing is provided with a reset hole, and the reset button is positioned opposite the reset hole. When the circuit fault is cleared, the reset button can be manually operated through the reset hole to make the locking lever rotate against the driving force, thereby unlocking the traction lever.

[0015] In one possible implementation, the housing may include a user operating surface, with one end of the operating handle away from the operating mechanism extending into the user operating surface, and a reset hole located on the user operating surface. This technical solution integrates the reset operation and handle operation onto the same operating surface, thereby simplifying the structure and operation of the switching device.

[0016] In one possible implementation, the outer surface of the traction rod further includes a fifth surface, which is adjacent to the first surface and located between the second and fifth surfaces. The rotation radius of the fifth surface is greater than that of the first surface. When the locking rod rotates in the second rotation direction, the fifth surface can be used to confine one end of the locking rod to the first surface, thereby preventing the locking rod from over-resetting and completely disengaging from the traction rod.

[0017] In one possible implementation, to maintain the rotational tendency of the locking lever along the first rotation direction, the locking lever is provided with a first reset member. The first reset member is connected to the locking lever and is used to drive the locking lever to rotate along the first rotation direction.

[0018] The aforementioned first reset component may include elastic elements such as springs or sheet springs, and the use of elastic elements to apply driving force to the locking rod results in a simple structure and low cost.

[0019] In another possible implementation, to maintain the rotational tendency of the traction rod in the fourth rotational direction, the traction rod is provided with a second reset member. The second reset member is connected to the traction rod and is used to drive the traction rod to reset from the second position to the first position, so that the locking lever engages with the jump buckle when the operating handle moves the operating mechanism.

[0020] The aforementioned second reset component may include elastic elements such as springs or sheet springs. Using elastic elements to apply driving force to the traction rod results in a simple structure and low cost.

[0021] The switching device of this application, in addition to manually resetting the locking lever, can also reset the locking lever via a trip unit. In another possible implementation, the switching device further includes a second trip unit, which drives the locking lever to rotate in a second rotation direction according to a reset signal. In this way, both the locking and unlocking operations of the switching device do not require manual operation, which is beneficial for achieving automated control.

[0022] The specific type of switching device in this application is not limited; for example, the switching device may include a circuit breaker or a disconnecting switch.

[0023] The switching device of this application can be applied to multiple branches in a circuit. In one possible implementation, the switching device includes multiple moving contacts and multiple stationary contacts, wherein the number of the multiple moving contacts and the number of the multiple stationary contacts are equal and arranged in a one-to-one correspondence, and the multiple moving contacts are respectively connected to a transmission component. A single moving contact and its corresponding stationary contact can form a contact assembly and be applied to one branch.

[0024] Secondly, this application provides an inverter. The inverter includes an inverter circuit, a controller, and the switching device described in the first aspect. The inverter circuit is electrically connected to a power source via the switching device. The switching device is used to connect or disconnect the electrical connection between the photovoltaic module and the inverter circuit. The controller is electrically connected to the switching device. When a fault occurs in the inverter, the controller sends a drive signal to the switching device. The first trip unit of the switching device is used to disengage the operating handle from the operating mechanism according to the drive signal, thereby preventing the operating handle from controlling the operating mechanism to move the moving contact, thus keeping the moving contact separated from the stationary contact, thereby disconnecting the electrical connection between the photovoltaic module and the inverter circuit.

[0025] When the inverter detects a fault, the switching device trips. During the tripping process, the first trip unit disengages the locking lever from the trip latch via the traction rod, thereby disengaging the operating mechanism from the operating handle and separating the moving and stationary contacts. Because the locking lever holds the traction rod in the second position, even if the operating handle is operated while the switching device is in the tripped state, the trip unit will still disengage the locking lever from the trip latch, preventing the operating mechanism from moving the moving contact. This prevents the switching device from closing, keeping the electrical connection between the photovoltaic modules and the inverter circuit disconnected, thus improving the inverter's safety. Attached Figure Description

[0026] Figure 1 is a schematic diagram of an application scenario of a power system provided in an embodiment of this application;

[0027] Figure 2 is a partial schematic diagram of a power system in Figure 1 within the dashed box;

[0028] Figure 3 is a schematic diagram of a switching device provided in an embodiment of this application;

[0029] Figure 4 is a schematic diagram of a switching device provided in an embodiment of this application;

[0030] Figure 5 is another schematic diagram of the switching device provided in an embodiment of this application;

[0031] Figure 6 is an exploded view of a switching device provided in an embodiment of this application;

[0032] Figure 7 is a schematic diagram of the engagement of the locking assembly and the jumper provided in an embodiment of this application;

[0033] Figure 8 is an exploded view of the locking assembly and the jump buckle provided in the embodiment of this application;

[0034] Figure 9 is another schematic diagram showing the engagement of the traction rod, locking assembly, and jump buckle provided in an embodiment of this application;

[0035] Figure 10 is a schematic diagram of a traction rod provided in an embodiment of this application;

[0036] Figure 11 is another schematic diagram of the traction rod provided in an embodiment of this application;

[0037] Figure 12 is a schematic cross-sectional view of the traction rod along the AA direction in Figure 10;

[0038] Figure 13 is a schematic diagram of a locking lever provided in an embodiment of this application;

[0039] Figure 14 is a schematic diagram of the engagement of the locking rod and the traction rod provided in an embodiment of this application;

[0040] Figure 15 is another schematic diagram of the cooperation between the locking rod and the traction rod provided in an embodiment of this application;

[0041] Figure 16 is a schematic diagram of the traction rod, locking rod and jump buckle provided in the embodiment of this application when the traction rod is in the first position;

[0042] Figure 17 is a schematic diagram of the traction rod, locking rod and jump buckle provided in the embodiment of this application when the traction rod is in the second position;

[0043] Figure 18 is another schematic diagram of the traction rod, locking rod and transmission mechanism provided in the embodiment of this application;

[0044] Figure 19 is a partial schematic diagram of the switching device in Figure 18;

[0045] Figure 20 is an exploded schematic diagram of the operating mechanism and moving contact provided in an embodiment of this application;

[0046] Figure 21 is a schematic diagram of the switching device provided in the embodiment of this application in the open state;

[0047] Figure 22 is a partial schematic diagram of the switching device in Figure 21;

[0048] Figure 23 is a schematic diagram of the switching device provided in the embodiment of this application in a tripped state;

[0049] Figure 24 is a partial schematic diagram of the switching device in Figure 23;

[0050] Figure 25 is another schematic diagram of the switching device provided in an embodiment of this application;

[0051] Figure 26 is a schematic diagram of the first trip unit provided in an embodiment of this application.

[0052] Reference numerals: 10-Photovoltaic power generation system; 20-Power system; 21-Controller; 30-Switch device; 31-Operating handle; 32-Operating mechanism; 33-Contact assembly; 34-First trip unit; 35-Housing; 36-Second trip unit; 311-Knob; 321-Traction rod; 322-Lock rod; 323-Locking rod; 324-First mounting plate; 325-Second mounting plate; 326-First spring; 327-Drive crank; 328-Reset drive unit; 340-Drive component; 341-Moving iron core; 342-Stationary iron core; 343-First permanent magnet; 344- First coil 345 - Second spring 351 - Reset hole 352 - User operating surface 3211 - Sliding groove 3212 - First step 3213 - Second step 3221 - Groove 3222 - Hook 3231 - Sliding part 3241 - First sliding groove 3251 - Second sliding groove S1 - First surface S2 - Second surface S3 - Third surface S4 - Fourth surface COD - Input crank DF - Input connecting rod FG - Rocker arm HE - Jumper HJ - Upper connecting rod JK - Lower connecting rod KO'L' - Output crank LL' - Output shaft Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. To facilitate understanding of the switching device and inverter provided in the embodiments of this application, their application scenarios are described below. The switching device and inverter provided in the embodiments of this application can be widely used in various power supply and distribution systems. In one example provided in this application, the inverter can be applied to a photovoltaic power generation system, which is a system that uses solar energy to generate electricity, providing people with clean and renewable energy by converting solar energy into electrical energy. Figure 1 is a schematic diagram of an application scenario of the power system provided in the embodiments of this application, and Figure 2 is a partial schematic diagram of a power system in Figure 1 within the dashed box. As shown in Figures 1 and 2, the photovoltaic power generation system 10 includes an energy storage system and photovoltaic modules. The photovoltaic panel strings in the photovoltaic modules convert solar energy into direct current (DC) through the photovoltaic effect, and the inverter converts the DC output from the photovoltaic modules into alternating current (AC) and further transmits the AC to the prefabricated substation. The prefabricated substation converts the low-voltage AC power output from the inverter into medium-voltage AC power, which is then transmitted to a step-up substation, the power grid, or a prefabricated substation corresponding to an energy storage system. The energy storage system stores the unstable electrical energy from the photovoltaic modules. It comprises multiple parallel-connected battery clusters, which, through an energy storage converter and the corresponding prefabricated substation, output stable electrical energy to the power grid. The power system 20 includes photovoltaic modules and an inverter. Taking photovoltaic modules as the power source, in this power system 20, the inverter includes an inverter circuit, a controller 21, and a switching device 30. The inverter circuit is electrically connected to the photovoltaic modules through the switching device 30. The switching device 30 is used to connect or disconnect the electrical connection between the photovoltaic modules and the inverter circuit. When maintenance, repair, or replacement of the battery clusters or photovoltaic panel strings is required, the electrical connection between the photovoltaic modules and the inverter circuit can be disconnected by disconnecting the switching device 30. This ensures that maintenance and repair of the power system 20 will not pose a danger to personnel or the inverter. In addition, the switching device 30 can also be used for the regulation and control of the power system 20. The controller 21 is electrically connected to the switching device 30 and is used to control the switching device 30 to turn on and off.

[0054] The switching device 30 of this application can be applied to multiple circuits. In one embodiment, the switching device 30 includes an operating handle, an operating mechanism, multiple moving contacts, and multiple stationary contacts. The operating handle is drive-connected to the operating mechanism. The number of the multiple moving contacts and the number of the multiple stationary contacts are equal and correspond one-to-one. The multiple moving contacts are drive-connected to the operating mechanism. A single moving contact and its corresponding stationary contact can form a contact assembly and be used to connect or disconnect a circuit. Figure 3 is a schematic diagram of a switching device provided in an embodiment of this application. As shown in Figure 3, in one embodiment, the switching device 30 can be a rotary disconnector, which includes a multi-layer contact assembly. For example, the power system 20 includes 14 strings of photovoltaic panels, which are connected to the rotary disconnector. The rotary disconnector includes at least 12 layers of contact assemblies, each of which includes a pair of moving contacts and a pair of stationary contacts. The stationary contacts of the multi-layer contact assembly are stacked and installed by interlocking with each other through a connecting mechanism. When the operating handle is turned, the operating handle can drive the operating mechanism to move, thereby causing the operating mechanism to drive the moving contacts in each layer of the contact assembly to move and contact or separate from the stationary contacts, achieving the effect of synchronous movement.

[0055] As shown in Figure 2, when the inverter malfunctions, the controller 21 generates a drive signal and sends it to the switching device 30. This drive signal can be a tripping command sent by the controller 21 or a change in current parameters. When the switching device 30 receives the drive signal, it trips (i.e., the switching device 30 opens and the operating handle cannot be closed), disconnecting the photovoltaic modules and inverter circuit at both ends of the switching device 30. At this time, the operating mechanism inside the switching device 30 disengages from the operating handle, preventing closure. Since manually driving the operating handle can reconnect the operating handle to the operating mechanism, the switching device 30 will be briefly closed manually until the fault is resolved.

[0056] However, since the fault has not been resolved, the switching device will still trip after a brief closing. Repeated closing can easily damage the switching device, causing it to fail, which is detrimental to the safety and voltage output stability of the inverter.

[0057] In view of this, this application provides a switching device and an inverter to keep the operating handle of the switching device in a disengaged state from the operating mechanism in the event of a fault, so that the switching device cannot be closed, thereby improving the stability of the switching device in the tripping state.

[0058] It should be noted that the terminology used in the following embodiments is for the purpose of describing specific embodiments only and is not intended to be a limitation of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise.

[0059] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0060] Figure 4 is a schematic diagram of a switching device provided in an embodiment of this application, Figure 5 is another schematic diagram of a switching device provided in an embodiment of this application, and Figure 6 is an exploded view of a switching device provided in an embodiment of this application. As shown in Figures 4, 5, and 6, the switching device 30 includes a housing (not shown), an operating handle 31, an operating mechanism 32, a contact assembly 33, and a first trip unit 34, wherein the operating handle 31 is throttle-connected to the operating mechanism 32. The contact assembly 33 includes a moving contact 331 and a stationary contact, and the operating mechanism 32 is connected to the moving contact 331. At least the portion of the operating handle 31 near the operating mechanism 32, the operating mechanism 32, the contact assembly 33, and the trip unit 34 are located within the housing. The operating handle 31 is used to control the operating mechanism 32 to move the moving contact 331, so that the moving contact 331 can contact or separate from the stationary contact. In one embodiment, the end of the operating handle 31 away from the operating mechanism 32 can extend out of the housing, so that the operator can push the operating handle 31 to perform closing and opening operations. As shown in Figure 3, in another embodiment, a knob 311 is provided on the outer surface of the housing to manually operate the switch device 30 to open and close the circuit. Specifically, the end of the operating handle 31 away from the operating mechanism 32 extends out of the housing and connects to the knob 311. When the operator manually operates the knob, rotating the knob 311 can drive the operating handle 31 to move. In another embodiment, the switch device 30 may also include a remote controller and an electric operating device. The electric operating device is connected to the operating handle 31 and the remote controller to electrically operate the switch device 30 to open and close the circuit. When the operator electrically operates the device, a closing command or an opening command is sent to the remote controller. The remote controller can control the electric operating device to drive the operating handle 31 to move. In this embodiment, the operator can issue commands by approaching the switch device 30 or by issuing commands remotely through a communication device.

[0061] It should be noted that, in the embodiments of this application, the switching device 30 can be a disconnecting switch, a circuit breaker, a load switch, or other types of switches.

[0062] As shown in Figure 6, the operating mechanism 32 includes a locking assembly and a transmission assembly. The operating handle 31 and the moving contact 331 are respectively connected to the transmission assembly. The transmission assembly includes a jump buckle HE, and the locking assembly includes a traction rod 321, a locking rod 322, and a locking rod 323. The jump buckle HE, traction rod 321, locking rod 322, and locking rod 323 rotate relative to the housing. Specifically, the traction rod 321 rotates around point A, the locking rod 322 rotates around point B, and the locking rod 323 rotates around point Q. The locking rod 322 is used to engage or disengage with the jump buckle HE.

[0063] Figure 7 is a schematic diagram of the locking assembly and the jump buckle provided in an embodiment of this application; Figure 8 is an exploded view of the locking assembly and the jump buckle provided in an embodiment of this application; and Figure 9 is another schematic diagram of the traction rod, locking assembly, and jump buckle provided in an embodiment of this application. As shown in Figures 7, 8, and 9, the locking rod 322 is provided with a groove 3221. The jump buckle HE is provided with a hook 3222 on the side near the locking rod 322. The hook 3222 can hook into the groove 3221, thereby realizing the engagement of the locking rod 322 and the jump buckle HE. One end of the locking rod 323 extends to the outer periphery of the traction rod 321 and is used to contact the traction rod 321.

[0064] Figure 10 is a schematic diagram of a traction rod provided in an embodiment of this application, Figure 11 is another schematic diagram of a traction rod provided in an embodiment of this application, and Figure 12 is a cross-sectional schematic diagram of the traction rod in Figure 10 along the AA direction. As shown in Figures 10, 11, and 12, the outer surface of the traction rod 321 near the locking rod 323 includes adjacent first surface S1 and second surface S2. The distance from the first surface S1 to the rotation center of the traction rod 321 is greater than the distance from the second surface S2 to the rotation center of the traction rod 321. Specifically, the outer surface of the traction rod 321 is provided with a sliding groove 3211. The bottom wall of the sliding groove 3211 has a first step 3212. The two side surfaces of the first step 3212 are the first surface S1 and the second surface S2, respectively.

[0065] Figure 13 is a schematic diagram of a locking rod provided in an embodiment of this application; Figure 14 is a schematic diagram of a locking rod and a traction rod cooperating in an embodiment of this application; and Figure 15 is another schematic diagram of a locking rod and a traction rod cooperating in an embodiment of this application. As shown in Figures 13, 14, and 15, one end of the locking rod 323 is provided with a sliding part 3231, which is used to slide along the bottom wall of the sliding groove 3211 within the sliding groove 3211. The locking rod 323 is driven to rotate in a first rotation direction, causing the aforementioned end of the locking rod 323 to slide towards the second surface S2 on the first surface S1.

[0066] When the traction rod 321 is in the first position, one end of the locking rod 323 contacts the first surface S1, and the first surface S1 of the traction rod 321 abuts against the locking rod 322, keeping the locking rod 322 engaged with the jump buckle HE. This allows the operating handle 31 to control the operating mechanism 32 to move the moving contact 331, thereby causing the moving contact 331 to contact or separate from the stationary contact. When the traction rod 321 is in the second position, one end of the locking rod 323 contacts the second surface S2, and the second surface S2 of the traction rod 321 abuts against the locking rod 322, disengaging the locking rod 322 from the jump buckle HE. This disengages the operating handle 31 from the transmission assembly, preventing the operating handle 31 from controlling the operating mechanism 32 to move the moving contact 331, and keeping the moving contact 331 separated from the stationary contact.

[0067] The first trip unit 34 includes a drive component 340. The first trip unit 34 is used to drive the drive component 340 to rotate the traction rod 321 from a first position to a second position according to a drive signal, and to rotate the locking rod 323 along a first rotation direction, so that the sliding portion 3231 of the locking rod 323 slides from the first surface S1 to the second surface S2 and is confined to the second surface S2, thereby disengaging the locking rod 322 from the trip lock HE and maintaining it in a disengaged state. After the locking rod 323 slides from the first surface S1 to the second surface S2, since the distance from the first surface S1 to the rotation center of the traction rod 321 is greater than the distance from the second surface S2 to that rotation center, a first step 3212 is formed between the first surface S1 and the second surface S2. When the sliding portion 3231 of the locking rod 323 is located on the second surface S2, if the traction rod 321 rotates from the second position to the first position, the sliding portion 3231 of the locking rod 323 has a relative tendency to move from the second surface S2 towards the first surface S1 relative to the traction rod 321. However, the first step 3212 between the first surface S1 and the second surface S2 prevents this relative sliding tendency from being realized, thus preventing the traction rod 321 from resetting to the first position and remaining in the second position. As a result, the switchgear 30 remains in the tripped state. Therefore, in the event of a fault, even if the operating handle 31 is operated, the first trip unit 34 will still disengage the locking rod 322 from the trip latch HE, preventing the operating mechanism 32 from moving the moving contact 331, thus preventing the switchgear 30 from closing, thereby improving the stability of the switchgear 30 in the tripped state.

[0068] In this application, an external inverter fault may be caused by a fault in the external environment of the inverter. This external environmental fault may occur inside or outside the inverter; both are considered external faults in this application. Once an external inverter fault occurs, it can be inspected and resolved by the user or the system.

[0069] After the drive component 340 of the first trip unit 34 is reset, when the locking lever 323 rotates in the second rotation direction, one end of the locking lever 323 disengages from the traction lever 321, allowing the traction lever 321 to reset from the second position to the first position. This allows the locking lever 322 to engage with the trip lock HE when the operating handle 31 drives the operating mechanism 32. The first rotation direction is opposite to the second rotation direction. Therefore, after the fault is resolved, by driving the locking lever 323 to rotate in the second rotation direction, the traction lever 321 can be reset. Thus, when the operating handle 31 drives the operating mechanism 32, the trip lock HE can engage with the locking lever 322, thereby enabling the closing and opening of the switching device 30 via the operating handle 31.

[0070] Figure 16 is a schematic diagram of the traction rod, locking rod, and jump buckle provided in the embodiment of this application when the traction rod is in the first position. As shown in Figure 16, when the traction rod 321 is in the first position, the third surface S3 of the traction rod 321 abuts against the locking rod 322, so that the locking rod 322 and the jump buckle HE are kept engaged. Figure 17 is a schematic diagram of the traction rod, locking rod, and jump buckle provided in the embodiment of this application when the traction rod is in the second position. As shown in Figure 17, when the traction rod 321 is in the second position, the fourth surface S4 of the traction rod 321 abuts against the locking rod 322, and the locking rod 322 is disengaged from the jump buckle HE. The third surface S3 and the fourth surface S4 of the traction rod 321 are arranged adjacent to each other. The release device 34 drives the traction rod 321 to rotate counterclockwise around point A, so that the traction rod 321 rotates from the first position to the second position. As the traction rod 321 rotates from the first position to the second position, it drives the locking rod 322 to rotate counterclockwise around point B. The locking rod 322 also slides from the third surface S3 to the fourth surface S4 of the traction rod 321, thus separating the locking rod 322 from the jump catch HE. Meanwhile, the locking rod 323 rotates clockwise around point Q.

[0071] Figure 18 is another schematic diagram of the traction rod, locking rod, and transmission mechanism provided in an embodiment of this application, and Figure 19 is a partial schematic diagram of the switching device in Figure 18. As shown in Figures 5, 18, and 19, the operating mechanism 32 also includes a first mounting plate 324 and a second mounting plate 325. The transmission assembly also includes an input crank COD, an input connecting rod DF, a rocker arm FG, an upper connecting rod HJ, a lower connecting rod JK, an output crank KO'L', an output shaft LL', and a first spring 326. The first mounting plate 324 and the second mounting plate 325 are disposed opposite to each other, and the first mounting plate 324 and the second mounting plate 325 are respectively fixed relative to the housing. The operating handle 31 passes through the first mounting plate 324 and the second mounting plate 325, and one end of the operating handle 31 is located on the side of the first mounting plate 324 away from the second mounting plate 325. The input crank COD and the input connecting rod DF are both located on the side of the first mounting plate 324 away from the second mounting plate 325. The jumper HE, rocker arm FG, upper connecting rod HJ, lower connecting rod JK, and output crank KO'L' are all located between the first mounting plate 324 and the second mounting plate 325.

[0072] Specifically, the operating handle 31 can rotate clockwise or counterclockwise relative to the first mounting plate 324. The input crank COD is sleeved on the operating handle 31 and is fixedly connected to the operating handle 31. Thus, when the operating handle 31 rotates, the input crank COD can rotate around point O with the operating handle 31. One end of the input connecting rod DF is rotatably connected to the input crank COD at point D, and the other end of the input connecting rod DF is rotatably connected to the rocker arm FG at point F. The rocker arm FG is rotatably connected to the first mounting plate 323 and the second mounting plate 324 at point G, so that the rocker arm FG can rotate around G relative to the first mounting plate 324 and the second mounting plate 325. The rocker arm FG is provided with a reset drive unit 328. When the traction rod 321 is in the first position and the locking rod 322 is separated from the trip lever, the operating handle 31 is driven to rotate, thereby causing the rocker arm FG to rotate in a direction close to the first trip unit 34, thereby causing the reset drive unit 328 to drive the drive component 340 of the first trip unit 34 to reset.

[0073] The jumper HE is rotatably connected at point E to the first mounting plate 323 and the second mounting plate 324, allowing it to rotate relative to the first mounting plate 324 and the second mounting plate 325 around point E. One end of the jumper HE is rotatably connected to the upper connecting rod HJ at point H. The other end of the upper connecting rod HJ is rotatably connected to one end of the lower connecting rod JK at point J. The other end of the lower connecting rod JK is rotatably connected to the output crank KO'L' at point K. The output crank KO'L' is coaxially arranged with the operating handle 31 and can rotate relative to the second mounting plate 325 around point O'. The output shaft LL' is fixedly connected to the output crank KO'L' at point L. The first mounting plate 324 has a first sliding groove 3241, and the second mounting plate 325 has a second sliding groove 3251. The output shaft LL' passes through the first sliding groove 3241 and the second sliding groove 3251, and can slide simultaneously within both the first sliding groove 3241 and the second sliding groove 3251. One end of the first spring 326 is fixed relative to the rocker arm FG at point P. The upper connecting rod HJ and the lower connecting rod JK are rotatably connected at point J via a rotating shaft, and the other end of the first spring 326 can be fixed relative to this rotating shaft at point J.

[0074] Figure 20 is an exploded view of the operating mechanism and moving contact provided in an embodiment of this application. As shown in Figure 20, the operating mechanism 32 further includes a drive crank 327, which is located on the side of the second mounting plate 325 opposite to the first mounting plate 324. The drive crank 327 is coaxially arranged with the operating handle 31, and the drive crank 327 can rotate relative to the second mounting plate 325 about point O'. One end of the output shaft LL' passes through the second slide groove 3251 and is fixedly connected to the drive crank 327, so that when the output shaft LL' slides in the second slide groove 3251, the drive crank 327 follows the output shaft LL' to rotate about point O'. The drive crank 327 is fixedly connected to the moving contact 331, so that the drive crank 327 can drive the moving contact 331 to move.

[0075] In one embodiment, the traction rod 321 is provided with a reset member, which drives the traction rod 321 to rotate from a second position to a first position, so that the locking rod 322 engages with the traction rod 321 when the operating handle 31 drives the operating mechanism 32 to move. In this way, after the trip unit 34 disengages from the traction rod 321, the traction rod 321 can be reset to the first position under the action of the reset member, thereby waiting for the locking rod 322 to re-engage with the trip latch, so that the switching device 30 can close and open.

[0076] The closing, opening, and tripping of the switching device 30 are described in detail below.

[0077] As shown in Figures 18 and 19, the switch device 30 is in the closed state, with the moving contact 331 in contact with the stationary contact. At this time, the traction rod 321 is in the first position, and the hook 3222 hooks the groove 3221, causing the locking rod 322 to engage with the trip latch HE. Thus, the trip latch HE remains stationary. One end of the first spring 326 is located at point P, and point P is located to the right of the upper connecting rod HJ. The other end of the first spring 326 is located at point J, causing the first spring 326 to exert a rightward force on the rotation axis of point J. If the rocker arm FG continues to rotate clockwise around point G from the position in Figure 19, point P can continue to move to the right. In this case, the lower connecting rod JK has a tendency to move clockwise under the action of the first spring 326, that is, point K has a tendency to move clockwise around O', causing the output crank KO'L' to have a tendency to rotate clockwise around point O'. However, the first slide 3241 and the second slide 3251 limit the rotation of the output shaft LL', thereby sequentially limiting the movement of the output crank KO'L', the lower connecting rod JK, the upper connecting rod HJ, and the rocker arm FG, so that the rocker arm FG is kept in the position shown in Figure 19, and the switch device 30 is kept in the closed state.

[0078] Figure 21 is a schematic diagram of the switching device provided in the embodiment of this application in the open state, and Figure 22 is a partial schematic diagram of the switching device in Figure 21. As shown in Figures 21 and 22, the switching device 30 is in the open state, and the moving contact 331 and the stationary contact are separated. At this time, the traction rod 321 is in the first position, and the hook 3222 hooks the groove 3221, so that the locking rod 322 is engaged with the trip latch HE. In this way, the trip latch HE remains stationary.

[0079] When the switching device 30 switches from the closed state to the open state, the operating handle 31 rotates counterclockwise around point O, thereby causing the input crank COD to rotate counterclockwise around point O in tandem with the operating handle 31. During the counterclockwise rotation of the input crank COD, point D moves to the right and causes point F to move to the upper right, which in turn causes the rocker arm FG to rotate counterclockwise around point G. During the counterclockwise rotation of the rocker arm FG around point G, point P of the first spring 326 moves from the right side of the upper connecting rod HJ to the left side of the upper connecting rod HJ. When point P is located on the left side of the upper connecting rod HJ, the first spring 326 applies a leftward force to the rotation axis of point J, thereby causing point J to move to the upper left, which in turn causes the lower connecting rod JK to move counterclockwise. During the counterclockwise movement of the lower connecting rod JK, the output crank KO'L' rotates clockwise around point O', causing the moving contact 331 to rotate clockwise and separate from the stationary contact.

[0080] When the switching device 30 switches from the open state to the closed state, the operating handle 31 rotates clockwise around point O, thereby causing the input crank COD to rotate clockwise around point O in tandem with the operating handle 31. During the clockwise rotation of the input crank COD, point D moves to the left and causes point F to move to the lower left, which in turn causes the rocker arm FG to rotate clockwise around point G. During the clockwise rotation of the rocker arm FG around point G, point P of the first spring 326 moves from the left side of the upper connecting rod HJ to the right side of the upper connecting rod HJ. When point P is located on the right side of the upper connecting rod HJ, the first spring 326 applies a rightward force to the rotation axis of point J, thereby causing point J to move to the lower right, which in turn causes the lower connecting rod JK to move clockwise. During the clockwise movement of the lower connecting rod JK, the output crank KO'L' rotates counterclockwise around point O', causing the moving contact 331 to rotate counterclockwise and contact the stationary contact.

[0081] Figure 23 is a schematic diagram of the switching device provided in the embodiment of this application in a tripped state, and Figure 24 is a partial schematic diagram of the switching device in Figure 23. As shown in Figures 23 and 24, the switching device 30 is in a tripped state, with the moving contact 331 and the stationary contact separated. At this time, the traction rod 321 is in the second position, and the hook 3222 disengages from the groove 3221, causing the locking rod 322 to disengage from the trip latch HE. When the switching device 30 switches from the closed state to the tripped state, the trip unit 34 drives the traction rod 321 to rotate counterclockwise around point A, thereby reducing the force of the traction rod 321 against the locking rod 322, causing the locking rod 322 to rotate counterclockwise around point B, and thus disengaging the locking rod 322 from the trip latch HE. At the instant the trip latch HE disengages from the locking rod 322, the trip latch HE rotates clockwise around point E, causing point H to move to the right. During the clockwise rotation of the trip button HE, the upper connecting rod HJ is driven to move clockwise, causing point J to move to the upper left, which in turn drives the lower connecting rod JK to move counterclockwise. During the counterclockwise movement of the lower connecting rod JK, the output crank KO'L' rotates clockwise around point O', causing the moving contact 331 to rotate clockwise and separate from the stationary contact, thus tripping the switching device 30.

[0082] When the switching device 30 switches from the tripped state to the open state, rotating the operating handle 31 simultaneously resets the drive component 340 and engages the locking lever 322 with the trip latch HE. Specifically, the drive operating handle 31 rotates counterclockwise around point O, causing the input crank COD to follow the operating handle 31 and rotate counterclockwise around point O. During the counterclockwise rotation of the input crank COD, point D moves to the right and causes point F to move to the upper right, thereby causing the rocker arm FG to rotate counterclockwise around point G. During the counterclockwise rotation of the rocker arm FG, the reset drive unit 328 drives the drive component 340 of the first trip unit 34 to reset; simultaneously, the rocker arm FG, through the first spring 326, causes the trip latch HE to rotate counterclockwise around point E, causing the hook 3222 to hook the groove 3221, thus engaging the locking lever 322 with the trip latch HE. In this way, the switching device 30 switches from the tripped state to the open state.

[0083] As shown in Figures 12 and 14, in another embodiment, the outer surface of the traction rod 321 further includes a fifth surface S5. The fifth surface S5 is disposed adjacent to the first surface S1, and the first surface S1 is located between the second surface S2 and the fifth surface S5. The rotation radius of the fifth surface S5 is greater than that of the first surface S1, and the fifth surface S5 and the first surface S1 form a second step 3213. When the power system 10 is operating normally, this second step 3213 can limit the locking rod 323 to the first surface S1, thereby preventing the locking rod 323 from over-resetting and completely disengaging from the traction rod 321.

[0084] The aforementioned locking lever 323 is driven to rotate along a first rotation direction. In one embodiment, to maintain the rotational tendency of the locking lever 323 along the first rotation direction, the operating mechanism 32 may further include a first reset member. The first reset member is connected to the locking lever 323 and is used to drive the locking lever 323 to rotate along the first rotation direction. In this embodiment, the first reset member may include an elastic element such as a spring or a sheet spring. Using an elastic element to apply a driving force to the locking lever 323 can simplify the structure of the switching device 30 and reduce manufacturing costs.

[0085] In another embodiment, to enable the traction rod 321 to reset from the second position to the first position, the switching device 30 may further include a second reset member. The second reset member is connected to the traction rod 321 and is used to drive the traction rod 321 to rotate from the second position to the first position. In this embodiment, the second reset member may include an elastic element such as a spring or a sheet spring. Using an elastic element to apply a driving force to the traction rod 321 simplifies the structure of the switching device 30 and reduces manufacturing costs.

[0086] Figure 25 is another schematic diagram of the switching device provided in an embodiment of this application. As shown in Figures 8 and 25, the locking lever 323 is provided with a reset key 3223, which is used to drive the locking lever 323 to rotate against the driving force of the reset member. The housing 35 is provided with a reset hole 351, and the reset key 3223 is positioned facing the reset hole 351. When the power system 20 generates an unlocking signal, the locking lever 323 can be rotated in the second rotation direction by manually operating the reset key 3223, thereby unlocking the traction lever 321.

[0087] The aforementioned housing 35 includes a user operating surface 352, an operating handle 31 extending to the user operating surface 352, and a reset hole 351 located on the user operating surface 352. This embodiment integrates the reset operation and handle operation onto the same operating surface, simplifying the structure and operation steps of the switching device 30.

[0088] In addition to manually resetting the locking lever 323, the locking lever 323 can also be reset via the second trip unit 36. As shown in Figures 4 and 5, in another embodiment, the switching device 30 further includes a second trip unit 36. When the fault disappears, the controller 21 sends a reset signal to the switching device 30. The second trip unit 36 ​​is used to drive the locking lever 323 to rotate in a second rotation direction according to the reset signal. In this way, both the locking and unlocking operations of the switching device 30 do not require manual operation, which is beneficial for achieving automatic control.

[0089] In the embodiments of this application, the first trip unit 34 can be an electromagnetic trip unit. Figure 26 is a schematic diagram of the first trip unit provided in an embodiment of this application. As shown in Figure 26, specifically, the first trip unit 34 may include a moving iron core 341, a stationary iron core 342, a first permanent magnet 343, a first coil 344, and a second spring 345. The stationary iron core 342 has a first receiving space. One end of the moving iron core 341, the first permanent magnet 343, and the first coil 344 are located within the first receiving space. The first permanent magnet 343 is located at one end of the moving iron core 341, and the first coil 344 is sleeved on the moving iron core 341. The other end of the moving iron core 341 extends out of the first receiving space and is positioned towards the traction rod 321. The second spring 345 is sleeved on the other end of the moving iron core 341. One end of the second spring 345 is fixed relative to the stationary iron core 342, and the other end of the second spring 345 is fixed relative to the other end of the moving iron core 341. The first trip unit 34 is used to energize the first coil 344 according to the first drive signal and / or the second drive signal, generating a first induced magnetic field opposite to the magnetic field direction of the first permanent magnet 343, so that the moving iron core 341 moves toward the traction rod 321 (vertically upward in Figure 26) under the action of the second spring 345, and drives the traction rod 321 to rotate from the first position to the second position. When the first trip unit 34 is in the initial state (as shown in the left side of Figure 26), the first permanent magnet 343 magnetically attracts the moving iron core 341 and compresses the second spring 345. When the first coil 344 is energized, the first induced magnetic field generated by the first coil 344 cancels out the magnetic field of the first permanent magnet 343. Therefore, the second spring 345 drives the other end of the moving iron core 341 to move away from the stationary iron core 342, thereby causing the moving iron core 341 to move toward the traction rod 321 (as shown in the right side of Figure 26). When the first drive signal or the second drive signal disappears, the first coil 344 is not energized, and the moving iron core 341 remains in the position abutting against the traction rod 321. In one embodiment, the moving iron core 341 can be a drive component 340. In another embodiment, the moving iron core 341 is connected to the drive component 340. When the moving iron core 341 moves away from the stationary iron core 342, the moving iron core 341 drives the drive component 340 to move towards the traction rod 321. When the first trip unit 34 is reset, the moving iron core 341 is driven to move in the opposite direction by the reset drive unit 328, so that the first permanent magnet 343 magnetically attracts the moving iron core 341 and compresses the second spring 345.

[0090] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A switching device, characterized by The circuit breaker comprises a housing, an operating handle, an operating mechanism, a movable contact, a static contact and a first tripping device, wherein: the operating handle is connected with the operating mechanism, and the operating mechanism is connected with the movable contact; at least a part of the operating handle close to the operating mechanism, the operating mechanism, the movable contact, the static contact and the first tripping device are located in the housing; the operating mechanism comprises a lock assembly and a transmission assembly; the operating handle and the movable contact are respectively in transmission connection with the transmission assembly; the transmission assembly comprises a jumper and a rocker, the lock assembly comprises a traction rod, a lock rod and a locking rod, and the jumper, the rocker, the traction rod, the lock rod and the locking rod are respectively relatively rotatable with the housing; the jumper is in transmission connection with the rocker; the operating handle and the movable contact are respectively in transmission connection with the rocker; one end of the locking rod extends to the outer periphery of the traction rod and is used for contacting the traction rod; the outer surface of the traction rod close to the locking rod comprises adjacent first and second surfaces, and the distance from the first surface to the rotation center of the traction rod is greater than the distance from the second surface to the rotation center of the traction rod; when the traction rod is located at a first position, the one end of the locking rod is in contact with the first surface, a third surface of the traction rod abuts against the lock rod, and the lock rod and the jumper are kept in a buckled state, so that the operating handle can control the operating mechanism to drive the movable contact to move, thereby making the movable contact contact or separate from the static contact; when the traction rod is located at a second position, the one end of the locking rod is in contact with the second surface, a fourth surface of the traction rod abuts against the lock rod, and the lock rod and the jumper are separated, so that the operating handle is tripped from the transmission assembly, so that the operating handle cannot control the operating mechanism to drive the movable contact to move, and the movable contact is kept in a separated state from the static contact; the first tripping device comprises a driving component; the first tripping device is used for driving the driving component to drive the traction rod to rotate from the first position to the second position and to rotate the locking rod in a first rotation direction, so that the one end of the locking rod slides from the first surface to the second surface and is limited on the second surface, thereby making the lock rod and the jumper separate and keep in a separated state; the rocker is provided with a reset driving part, and the reset driving part is used for driving the driving component to reset when the operating handle drives the rocker to rotate in a direction close to the first tripping device.

2. The switching device of claim 1, wherein when the locking rod rotates in a second rotation direction, the one end of the locking rod is separated from the traction rod, so that the reset driving part can drive the driving component to reset, and the traction rod can reset from the second position to the first position, so that the lock rod and the jumper are buckled when the operating handle drives the operating mechanism to move; wherein the first rotation direction is opposite to the second rotation direction.

3. The switching device of claim 2, wherein When the one end of the locking rod is disengaged from the traction rod, the operation handle is driven to rotate to drive the rocker arm to rotate, so that the reset driving part drives the driving part to reset, and the jump buckle is driven to rotate towards the lock catch rod and engage with the lock catch rod.

4. A switching device as claimed in claim 2 or 3, characterized in that The locking rod is provided with a reset key for driving the locking rod to rotate in the second rotation direction; the shell is provided with a reset hole, and the reset key is arranged opposite to the reset hole.

5. The switching device of claim 4, wherein The shell comprises a user operation surface, and the operation handle extends to the user operation surface away from the one end of the operation mechanism; and the reset hole is located on the user operation surface.

6. The switch device according to any one of claims 1 to 5, wherein The outer surface of the traction rod further comprises a fifth surface, the fifth surface is arranged adjacent to the first surface, and the first surface is located between the second surface and the fifth surface; the rotation radius of the fifth surface is greater than that of the first surface. When the locking rod rotates in the second rotation direction, the fifth surface is used to limit the one end of the locking rod to the first surface.

7. The switch device according to any one of claims 1 to 6, wherein The locking rod is provided with a first reset part for driving the locking rod to rotate in the first rotation direction.

8. The switch device according to any one of claims 1 to 7, wherein The traction rod is provided with a second reset part for driving the traction rod to reset from the second position to the first position, so that the lock catch rod engages with the jump buckle when the operation handle drives the operation mechanism to move.

9. The switch device according to any one of claims 1 to 8, wherein The switch device further comprises a second tripper for driving the locking rod to rotate in the second rotation direction according to a reset signal.

10. The switch device according to any one of claims 1 to 9, wherein The switch device comprises a circuit breaker or a disconnecting switch.

11. The switch device according to any one of claims 1 to 10, wherein The switch device comprises a plurality of moving contacts and a plurality of static contacts, the number of the plurality of moving contacts and the number of the plurality of static contacts are equal and one-to-one corresponding, and the plurality of moving contacts are respectively in transmission connection with the transmission assembly.

12. An inverter, characterized by comprising: The switch device comprises an inverter circuit, a controller and a switch device as claimed in any one of claims 1 to 11. The inverter circuit is electrically connected with a photovoltaic module through the switch device, the switch device is used to turn on or turn off the electrical connection between the photovoltaic module and the inverter circuit; and the controller is electrically connected with the switch device. The controller is used to send the driving signal to the switch device when an external fault occurs in the inverter, and the first tripper of the switch device is used to make the operation handle and the operation mechanism trip according to the driving signal, so that the operation handle cannot control the operation mechanism to drive the moving contact to move, so that the moving contact and the static contact remain separated, and the electrical connection between the photovoltaic module and the inverter circuit is disconnected.

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