Tripping device, tripping switch and photovoltaic inverter system

Abstract

The utility model discloses a release, a release switch and a photovoltaic inverter system, the release comprises an inductor assembly, a push rod and an elastic assembly, the inductor assembly can push the push rod to move from an initial position to a first position and a second position, and the push rod is used for pushing a release sheet to move so as to realize release. Wherein the spacing distance between the first position and the first initial position is smaller than the spacing distance between the second position and the first initial position. According to the release disclosed by the invention, the push rod can be controlled through the first state of the inductance assembly to realize the release of the release sheet in a normal state, and after the push rod completes the action, if the release sheet has an abnormal phenomenon that the release cannot be released, the inductance assembly can be switched to the second state to increase the moving distance of the push rod so as to enable the release sheet to be further released. Therefore, the hidden danger that the tripping piece cannot be tripped is avoided, the operation reliability of the tripper is improved, and the stable tripping performance of the tripping switch is further improved.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and more specifically, to a trip unit, a trip switch, and a photovoltaic inverter system. Background Technology

[0002] In a photovoltaic (PV) power generation system, the inverter is responsible for converting the direct current (DC) generated by the PV modules into alternating current (AC) and transmitting it to the power grid. However, if the inverter malfunctions and cannot be disconnected from the grid and PV modules in a timely manner, it may lead to further damage to the equipment or even a safety accident.

[0003] To address this issue, photovoltaic inverters typically employ DC disconnect switches with remote tripping capabilities, often referred to as trip switches, on their DC input side. Their function is to disconnect the inverter from the photovoltaic modules in the event of a fault, preventing the fault from escalating and thus protecting the system. However, existing trip switches have relatively low structural reliability, posing a risk of unreliable and unstable tripping, which could lead to failure to promptly disconnect the faulty circuit.

[0004] Therefore, how to improve the reliability of the trip unit and thus enhance the stable tripping performance of the trip switch has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a trip unit to improve the reliability of the trip unit operation, thereby enhancing the stable tripping performance of the trip switch.

[0006] Another object of this application is to provide a trip switch including the above-described trip unit.

[0007] Another object of this application is to provide a photovoltaic inverter system including the above-mentioned trip switch.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] A trip unit, comprising:

[0010] The inductor assembly has a mounting chamber;

[0011] A push rod, with a first end disposed within the mounting cavity and a second end extending out of the mounting cavity, wherein the inductor assembly pushes the push rod to move, and the push rod pushes the trip piece to move;

[0012] An elastic component is disposed within the mounting cavity and restricts the travel of the push rod;

[0013] Specifically, when the inductor component is in the initial state, the elastic component is in the initial form, and the push rod is in the first initial position. When the inductor component is in the first state, the elastic component deforms to the first form, and the push rod is in the first position. When the inductor component is in the second state, the elastic component deforms to the second form, and the push rod is in the second position. The distance between the first position and the first initial position is less than the distance between the second position and the first initial position.

[0014] Optionally, in the above-described trip unit, the resilient component includes...

[0015] The first elastic element and the second elastic element are both disposed in the mounting cavity and sleeved on the outside of the push rod;

[0016] Specifically, when the elastic component is in the initial state, the first elastic element is compressed by the inductor component or is in a natural state, and the second elastic element is in a natural state. When the elastic component is deformed to the first state, the first elastic element is compressed by the inductor component, and the second elastic element is in a natural state. When the elastic component is deformed to the second state, both the first elastic element and the second elastic element are compressed by the inductor component.

[0017] Optionally, in the above-described trip unit, the inductor assembly includes:

[0018] The static core is provided with the aforementioned mounting chamber;

[0019] The moving core is movably disposed within the mounting cavity and connected to the push rod;

[0020] An inductor is disposed in the mounting cavity, and the inductor drives the moving core to move the push rod.

[0021] Specifically, when the elastic component is in the initial state, the first elastic element is compressed by the moving core or is in a natural state, and the second elastic element is in a natural state. When the elastic component is deformed to the first state, the first elastic element is compressed by the moving core, and the second elastic element is in a natural state. When the elastic component is deformed to the second state, both the first elastic element and the second elastic element are compressed by the moving core.

[0022] Optionally, in the above-described trip unit, when the ends of the first elastic element and the second elastic element away from the moving core are aligned, in the natural state, the extension length of the first elastic element is greater than the extension length of the second elastic element.

[0023] Optionally, in the above-mentioned trip unit, the moving core is provided with a positioning groove, and the first end of the push rod is disposed in the positioning groove;

[0024] The second elastic element is sleeved outside the first elastic element. The two ends of the first elastic element abut against the bottom wall of the positioning groove and the inner wall of the mounting chamber, respectively. When the elastic component is deformed to the second form, the two ends of the second elastic element abut against the end face of the moving core and the inner wall of the mounting chamber, respectively.

[0025] A trip switch, comprising:

[0026] Install components;

[0027] A trip piece is movably mounted on the mounting assembly;

[0028] The aforementioned trip unit, wherein the inductor assembly is mounted on the mounting assembly;

[0029] Specifically, when the inductor assembly is in the initial state, the push rod is not in contact with the trip piece, and the trip piece is in the second initial position. When the inductor assembly is in the first state, the push rod pushes the trip piece to the first trip position. When the inductor assembly is in the second state, the push rod pushes the trip piece to the second trip position.

[0030] Optionally, the trip switch described above also includes a locking mechanism, which is disposed on the mounting assembly and is controlled to move between a locked position and an unlocked position by a first manual operating element. The locking mechanism includes a locking surface.

[0031] Specifically, when the trip piece is in the first trip position, the trip piece is arranged to avoid the movement path of the locking mechanism from the locking position to the unlock position. When the trip piece is in the second trip position, the trip piece engages with the locking surface and limits the movement of the locking mechanism from the locking position to the unlock position.

[0032] Optionally, in the trip switch described above, the trip piece is connected to a second manual operating element and is controlled by the second manual operating element to move from the second initial position to the first trip position or the second initial position;

[0033] Alternatively, a reset member may be slidably provided on the mounting assembly. The reset member is controlled by a second manual operating member to move between a third initial position and a working position. When the reset member moves from the third initial position to the working position, the reset member pushes the trip piece from the second initial position to the first trip position or the second initial position.

[0034] Optionally, in the trip switch described above, the inductor assembly is controlled by the control module and is electrically connected to the control module;

[0035] When the control module does not send a signal, the inductor is in the initial state. When the control module sends a first trip signal, the inductor is in the first state. When the control module sends a second trip signal, the inductor is in the second state.

[0036] A photovoltaic inverter system includes the trip switch described above.

[0037] The trip unit provided in this application includes an inductor assembly, a push rod, and a resilient assembly. The inductor assembly has a mounting chamber. The first end of the push rod is disposed in the mounting chamber, and the second end extends out of the mounting chamber. The inductor assembly can push the push rod to move. The push rod is used to push the trip piece to move, thereby achieving tripping. The resilient assembly is disposed in the mounting chamber and is used to limit the travel of the push rod. Specifically, when the inductor assembly is in its initial state, the elastic component is in its initial form, the push rod is in its first initial position and is not in contact with the trip piece, and the trip piece is in its second initial position. At this time, the circuit where the trip piece is located is connected and in a closed state. When the inductor assembly is in its first state, the elastic component deforms to its first form, the push rod is in its first position, and can push the trip piece to its first trip position. At this time, the trip piece is in an open state, that is, the circuit where the trip piece is located is broken and in a tripped open state. When the inductor assembly is in its second state, the elastic component deforms to its second form, the push rod is in its second position, and can push the trip piece to its second trip position. At this time, the trip piece is in an open state, that is, the circuit where the trip piece is located is broken and in a tripped open state. The distance between the first position and the first initial position is smaller than the distance between the second position and the first initial position. That is, compared to the first state, when the inductor assembly is in its second state, the push rod can push the trip piece to a second trip position that is further away from the second initial position, thereby improving the reliability of the tripping action.

[0038] The trip unit provided in this application can trip the trip piece by controlling the push rod in the first state of the inductor assembly under normal conditions. After the push rod completes its action, if the trip piece fails to trip normally, the inductor assembly can be switched to the second state to increase the movement distance of the push rod and further trip the trip piece, thereby avoiding the hidden danger of the trip piece failing to trip and improving safety. Furthermore, different fault states of the inverter can be matched with the first and second states of the inductor assembly respectively. Specifically, ordinary fault states can be matched with the first state of the inductor assembly, and severe fault states can be matched with the second state of the inductor assembly, so that when a severe fault occurs, the push rod can be directly pushed to move the trip piece to the second trip position, reducing the risk caused by abnormal tripping of the trip piece under severe fault conditions. The trip unit disclosed in this application improves the reliability of the trip unit operation by setting two tripping modes, thereby improving the stable tripping performance of the trip switch.

[0039] The trip switch and photovoltaic inverter system disclosed in this application include the aforementioned trip switch, and therefore also possess the aforementioned structure and beneficial effects. Other structures are described in reference to relevant technologies and will not be repeated here. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the structure of the trip switch disclosed in the embodiments of this application. Figure 1 ;

[0042] Figure 2 This is a schematic diagram of the structure of the trip switch disclosed in the embodiments of this application. Figure 2 ;

[0043] Figure 3 This is a schematic diagram of the structure of the trip switch disclosed in the embodiments of this application. Figure 3 ;

[0044] Figure 4 This is a schematic diagram of the structure of the trip switch disclosed in the embodiments of this application. Figure 4 ;

[0045] Figure 5 This is a schematic diagram of the structure of the trip switch disclosed in the embodiments of this application. Figure 5 ;

[0046] Figure 6 This is a schematic diagram of the structure of the trip switch disclosed in the embodiments of this application. Figure 6;

[0047] Figure 7 This is a simplified circuit diagram of the photovoltaic inverter system disclosed in the embodiments of this application.

[0048] Among them, 100 is the inductor assembly, 101 is the mounting chamber, 110 is the stationary core, 120 is the moving core, 130 is the inductor component, 131 is the positioning groove, 200 is the elastic component, 210 is the first elastic element, 220 is the second elastic element, 300 is the push rod, 400 is the trip piece, 410 is the reset element, 500 is the locking mechanism, 501 is the locking surface, 502 is the pushing surface, and 600 is the control module. Detailed Implementation

[0049] The core of this application is to disclose a trip unit to improve the reliability of the trip unit operation, thereby enhancing the stable tripping performance of the trip switch.

[0050] Another key aspect of this application is the disclosure of a trip switch that includes the aforementioned trip unit.

[0051] Another key aspect of this application is the disclosure of a photovoltaic inverter system including the aforementioned trip switch.

[0052] Hereinafter, embodiments will be described with reference to the accompanying drawings. Furthermore, the embodiments shown below do not limit the scope of the utility model as described in the claims. Additionally, the complete contents of the structures represented in the embodiments below are not limited to those necessary for the solution of the utility model as described in the claims. It should be noted that, for ease of description, only the parts relevant to the utility model are shown in the drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0053] Combination Figure 1 and Figure 2The trip unit disclosed in this application includes an inductor assembly 100, a push rod 300, and an elastic component 200. The inductor assembly 100 is provided with a mounting chamber 101. The first end of the push rod 300 is disposed in the mounting chamber 101, and the second end extends out of the mounting chamber 101. The inductor assembly 100 can push the push rod 300 to move. The push rod 300 is used to push the trip piece 400 to move, thereby realizing tripping. The elastic component 200 is disposed in the mounting chamber 101 and is used to limit the travel of the push rod 300. Specifically, when the inductor assembly 100 is in the initial state, the elastic component 200 is in the initial form, the push rod 300 is in the first initial position and has no contact with the trip piece 400, and the trip piece 400 is in the second initial position. At this time, the circuit where the trip piece 400 is located is connected and in the closed state. When the inductor assembly 100 is in the first state, the elastic component 200 deforms to the first form, the push rod 300 is in the first position, and can push the trip piece 400 to the first trip position. At this time, the trip piece 400 is in the open state, that is, the circuit where the trip piece 400 is located is broken and in the tripped open state. When the inductor assembly 100 is in the second state, the elastic component 200 deforms to the second form, the push rod 300 is in the second position, and can push the trip piece 400 to the second trip position. At this time, the trip piece 400 is in the open state, that is, the circuit where the trip piece 400 is located is broken and in the tripped open state. Wherein, the distance between the first position and the first initial position is smaller than the distance between the second position and the first initial position. That is, compared with the first state, when the inductor assembly 100 is in the second state, the push rod 300 can push the trip piece 400 to the second trip position, which is further away from the second initial position, thereby improving the reliability of the tripping action.

[0054] Compared to related technologies, the trip unit disclosed in this application, under normal conditions, can control the push rod 300 to trip the trip piece 400 through the first state of the inductor assembly 100. After the push rod 300 completes its action, if the trip piece 400 fails to trip normally, the inductor assembly 100 can be switched to the second state to increase the movement distance of the push rod 300, causing the trip piece 400 to trip further, thereby avoiding the hidden danger of the trip piece 400 failing to trip and improving safety. Furthermore, different fault states of the inverter can be linked to the inductor assembly 100. The first and second states of 0 are matched respectively. Specifically, the ordinary fault state can be matched with the first state of the inductor component 100, and the severe fault state can be matched with the second state of the inductor component 100. This allows the push rod 300 to directly push the trip piece 400 to the second trip position when a severe fault occurs, reducing the risk of abnormal tripping of the trip piece 400 under severe fault conditions. The trip device disclosed in this application improves the reliability of the trip device operation by setting two tripping modes, thereby improving the stable tripping performance of the trip switch.

[0055] In this application, the movement position of the push rod 300 is controlled by the magnitude of the elastic force generated by the elastic component 200 under different compression states. Specifically, in a specific embodiment disclosed in this application, the elastic component 200 includes a first elastic element 210 and a second elastic element 220. Both the first elastic element 210 and the second elastic element 220 are disposed within the mounting chamber 101 and sleeved on the outside of the push rod 300. The push rod 300 moves axially. When the elastic component 200 is in its initial state, the first elastic element 210 is compressed by the inductor component 100 or is in a free state, while the second elastic element 220 is in a free state. The push rod 300 is maintained in its first initial position by the elastic force of the first elastic element 210. When the elastic component 200 deforms to the first state, the first elastic element 210 is compressed by the inductor component 100, and the second elastic element 220 is in a free state. When the inductor component 100 stops applying force, the push rod 300 is maintained in its first initial position by the elastic force of the first elastic element 210. The inductor 100 can return to its initial position, and the push rod 300 can move to the first initial position along with the inductor 100. When the elastic component 200 deforms to the second form, the first elastic element 210 and the second elastic element 220 are both compressed by the inductor 100. When the inductor 100 stops applying force, under the elastic force of the first elastic element 210 and the second elastic element 220, the inductor 100 can return to its initial position, and the push rod 300 can move to the first initial position along with the inductor 100, effectively avoiding the situation where the push rod 300 cannot be reset due to component abnormality.

[0056] Specifically, the switching between the first and second states of the inductor component 100 can be controlled by controlling the magnitude of the force exerted by the inductor component 100 on the elastic component 200. The magnitude of the force exerted by the inductor component 100 on the elastic component 200 can be controlled by the magnitude of the current flowing through the inductor component 100. The structure is simple and the control is convenient. Figure 1 Let L1 be the initial distance between the inductor assembly 100 and the second elastic member 220 near the end of the inductor assembly 100, and L2 be the initial distance between the inductor assembly 100 and the second elastic member 220 away from the end of the inductor assembly 100. Let L3 be the actual distance the inductor assembly 100 moves during the tripping process. When the elastic member 200 deforms to the first form, only the first elastic member 210 is compressed, and L3 is less than or equal to L1. When the elastic member 200 deforms to the second form, both the first elastic member 210 and the second elastic member 220 are compressed, and L3 is greater than L1 and less than L2. It should be noted that a momentary current is usually passed through the inductor assembly 100, which generates a momentary force that causes the push rod 300 to push the trip piece 400 to trip and open the circuit breaker. After the push rod 300 moves once, it is no longer subject to the pushing force of the inductor assembly 100 and can return to the first initial position under the elastic force of the elastic member 200.

[0057] Combination Figure 2 When the ends of the first elastic member 210 and the second elastic member 220 away from the moving core 120 are aligned, in their natural state, the extension lengths of the first elastic member 210 and the second elastic member 220 may be the same or different. Furthermore, this application does not limit the diameters of the first elastic member 210 and the second elastic member 220. For example, Figure 1 and Figure 2 The diagram illustrates a technical solution in which, in its natural state, the extension length of the first elastic member 210 is greater than the extension length of the second elastic member 220, and the second elastic member 220 is sleeved outside the first elastic member 210. During the switching process of the inductor assembly 100 from the initial state to the first state, the inductor assembly 100 drives the push rod 300 to move and compresses the first elastic member 210; during the switching process of the inductor assembly 100 from the initial state to the second state, the inductor assembly 100 drives the push rod 300 to move and first compresses the first elastic member 210, and then simultaneously compresses the first elastic member 210 and the second elastic member 220. The structure is simple and reliable.

[0058] Combination Figure 3 The inductor assembly 100 includes a stationary core 110, a moving core 120, and an inductor component 130. The stationary core 110 is provided with a mounting chamber 101. The moving core 120 is movably disposed within the mounting chamber 101 and connected to a push rod 300. The inductor component 130 is disposed within the mounting chamber 101 and is used to drive the moving core 120 to move within the mounting chamber 101, thereby moving the push rod 300 and compressing the first elastic element 210 and the second elastic element 220. Specifically, when the inductor assembly 100 is in its initial state, the first elastic element 210 is compressed by the moving core 120 or is in its natural state, and the second elastic element 220 is in its natural state. When the inductor assembly 100 is in its first state, the first elastic element 210 is compressed by the moving core 120, and the second elastic element 220 is in its natural state. When the inductor assembly 100 is in its second state, both the first elastic element 210 and the second elastic element 220 are compressed by the moving core 120. The inductor component 130 includes, but is not limited to, electromagnetic coils, electromagnets, solenoids, etc. Figure 3 and Figure 4 The diagram illustrates a technical solution where the inductor component 130 is an electromagnetic coil, with a moving core 120 disposed within the electromagnetic coil and equipped with a boss that positions and engages with the electromagnetic coil. The stationary core 110 is a fixed portion. When the electromagnetic coil is energized, a magnetic field is generated around the stationary core 110. This magnetic field acts on the moving core 120, causing it to move mechanically, thereby moving the push rod 300. The structure is simple, low-cost, and easy to control. The switching of the inductor component 100 from an initial state to a first state and a second state can be achieved using different drive signals.

[0059] In some embodiments, combined with Figure 1The moving core 120 is provided with a positioning groove 131. The first end of the push rod 300 is located in the positioning groove 131. The second elastic element 220 is sleeved outside the first elastic element 210. The two ends of the first elastic element 210 abut against the bottom wall of the positioning groove 131 and the inner wall of the mounting chamber 101, respectively. The second elastic element 220 is sleeved outside the first elastic element 210, and its two ends abut against the end face of the moving core 120 and the inner wall of the mounting chamber 101, respectively. By setting the positioning groove 131, the moving core 120 can be positioned simultaneously and adapted to the different diameters of the first elastic element 210 and the second elastic element 220. The structure is simple and the assembly is convenient.

[0060] Combination Figure 3 and Figure 4 The trip switch disclosed in this application includes a mounting assembly (not shown in the figure), a trip piece 400, and the aforementioned trip unit. The trip piece 400 is movably disposed on the mounting assembly. When the inductor assembly 100 is in the initial state, the push rod 300 is not in contact with the trip piece 400, and the trip piece 400 is in a second initial position. When the inductor assembly 100 is in the first state, the push rod 300 pushes the trip piece 400 to the first trip position. When the inductor assembly 100 is in the second state, the push rod 300 pushes the trip piece 400 to the second trip position. Since it includes the aforementioned trip unit, it also possesses the aforementioned structure and beneficial effects. Other structures refer to related technologies and will not be described in detail here.

[0061] For example, the mounting components may include a housing, a support structure, a bracket, etc., wherein the trip piece 400 and the trip unit are both housed within the housing, which is typically made of metal (such as steel or aluminum alloy) or insulating material (such as plastic or epoxy resin) to provide sufficient mechanical strength and to provide dustproof, waterproof, and corrosion-resistant functions; the support structure is housed within the housing and is used to support and fix key components such as the trip piece 400 and the trip unit; the bracket is used to fix the trip switch to the switch cabinet or wall of the photovoltaic inverter system.

[0062] Further optimizing the solution, the trip switch disclosed in this application also includes a locking mechanism 500. The locking mechanism 500 is mounted on the mounting assembly and its movement between the locked and unlocked positions is controlled by a first manual operating element, and in conjunction with... Figure 3 and Figure 4The locking mechanism 500 includes a locking surface 501. When the trip piece 400 is in the first tripping position, it is arranged to avoid the movement path of the locking mechanism 500 from the locked position to the unlocked position; that is, the trip piece 400 does not affect the first manual operating member's operation of the locking mechanism 500's movement from the locked position to the unlocked position. When the trip piece 400 is in the second tripping position, it engages with the locking surface 501 and limits the movement of the locking mechanism 500 from the locked position to the unlocked position. In this case, manual operation is required to move the trip piece 400 to a position other than the second tripping position to release its limitation on the locking mechanism 500. The locking mechanism 500 can be, but is not limited to, a transmission rack, a moving rod, a moving plate, etc. The first manual operating member can be an operating handle, and its transmission method with the locking mechanism 500 includes, but is not limited to, gear transmission, translational pushing, etc.

[0063] In some embodiments, the trip piece 400 is connected to a second manual operating member and can be operated by the second manual operating member to move from a second initial position to a first trip position or a second initial position. For example, in combination with... Figure 4 and Figure 5 A reset element 410 is slidably mounted on the mounting assembly. The reset element 410 is controlled by a second manual operating element and can move between a third initial position and a working position. When the reset element 410 moves from the third initial position to the working position, it can push the trip piece 400 from the second initial position to the first trip position or the second initial position to unlock its locking limit on the locking mechanism 500. The second manual operating element can be a handle, button, or other manual operating component.

[0064] The trip switch disclosed in this application has two tripping modes. In the first tripping mode, the inductor component 100 is in the first state. At this time, the locking mechanism 500 can be moved normally by the first manual operating component. The movement of the locking mechanism 500 can drive the trip piece 400 to reset, thereby resetting the trip switch and closing it. After the trip piece 400 is reset, the photovoltaic inverter system continues to conduct and resumes normal operation. The first tripping mode is usually used for protection under light load or non-emergency conditions. For example, when the photovoltaic inverter system detects a slight overload or a brief abnormality, the electrical connection between the circuit breaker and the photovoltaic module can be temporarily disconnected, and then the circuit can be directly restored by operating the handle, thereby achieving rapid power supply restoration.

[0065] In the second tripping mode, the trip piece 400 engages with the locking mechanism 500, preventing the first manual operating component from closing the circuit breaker by pushing the locking mechanism 500. In this case, manual operation of the second manual operating component is required to release the lock of the trip piece 400 onto the locking mechanism 500 before the circuit breaker can be closed again. The second tripping mode is typically used for protection in severe faults or emergencies. For example, when a short circuit or severe overload is detected in a photovoltaic inverter system, the electrical connection between the circuit breaker and the photovoltaic modules needs to be quickly disconnected, and the trip piece 400 locks the locking mechanism 500 to prevent misoperation. This mode is suitable for scenarios where power supply can only be restored after manual confirmation of fault resolution, ensuring the safety of personnel and equipment. Compared to related technologies, the tripping switch disclosed in this application, through the setting of two tripping modes, enables different protection measures to be taken according to the severity of the circuit breaker fault, ensuring both the continuity of power supply and the safety of the system. Furthermore, since switching between the two tripping modes only requires changing the travel of the push rod 300, the structure is simple and the cost is low.

[0066] For example, in combination Figures 3-5 The invention illustrates a locking mechanism 500 positioned in the locking position, which is a transmission rack with a locking surface 501. When the trip piece 400 is in the first tripping position, the trip piece 400 is arranged to avoid the locking surface 501 and has a gap or contact with the pushing surface 502. During the process of the locking mechanism 500 moving to the left to the unlocking position, the pushing surface 502 can remain in a state of no contact with the trip piece 400 or contact the trip piece 400 and press the trip piece 400 down a certain distance. When the limit switch or other devices detect that the locking mechanism 500 has moved to the unlocking position, the corresponding operating mechanism of the trip switch closes and stores energy. When the trip piece 400 is in the second trip position, the trip piece 400 is engaged with the locking surface 501. At this time, the locking mechanism 500 is limited by the trip piece 400 and cannot move to the left to the unlock position. The second manual operating component must be manually operated to move the trip piece 400 to a position other than the second trip position before the first manual operating component can be operated to move the locking mechanism 500 to close the circuit.

[0067] Further optimize the plan, combined with Figure 6 The pushing surface 502 is arranged at a certain angle to the moving direction of the locking mechanism 500. When the trip piece 400 is in the first trip position, as the locking mechanism 500 moves from the locked position to the unlocked position, the trip piece 400 is gradually pressed down to the second initial position.

[0068] In addition, the trip piece 400 is hinged on the mounting assembly. In order to prevent the trip piece 400 from rotating too much and failing to reset, the reset member 410 located in the third initial position can also limit the maximum angle of the trip piece 400's rotational deviation from the second initial position.

[0069] Combination Figure 7 The inductor assembly 100 is controlled by the control module 600, which is electrically connected to the inductor assembly 100. The control module 600 controls the state switching of the inductor assembly 100, thereby controlling the position of the push rod 300. Specifically, the control module 600 can issue a first trip signal and a second trip signal. When the control module 600 does not issue a signal, the inductor assembly 100 is in the initial state. When the control module 600 issues the first trip signal, the inductor assembly 100 is in the first state. When the control module 600 issues the second trip signal, the inductor assembly 100 is in the second state. Specifically, the first switch S1 and the second switch S2 are connected in series with the inductor assembly 100 of the trip unit. The first switch S1 is controlled by a first trip signal, and the second switch S2 is controlled by a second trip signal. When neither the first switch S1 nor the second switch S2 receives a trip signal, both remain open, and the inductor assembly 100 is in its initial state. When the control module 600 sends the first trip signal, the first switch S1 closes and the second switch S2 remains open, and the inductor assembly 100 is in its first state. When the control module 600 sends the second trip signal, the second switch S2 closes, and the inductor assembly 100 is in its second state. To achieve reliable tripping, if the first trip signal output by the control module 600 fails to trip the trip piece 400, the control module 600 will continue to output the second trip signal to ensure that the trip switch operates. The first trip signal and the second trip signal can be from different signal sources and / or two different power ranges of the same signal source.

[0070] The trip unit disclosed in this application enables the photovoltaic inverter system to complete the tripping action to drive the trip switch to disconnect under different fault types, and the different operating strokes of the trip unit can be controlled by the drive signal of the photovoltaic inverter system. In addition, in the event of a serious fault in the photovoltaic inverter system, the trip unit cannot be directly manually closed and reset, which improves the reliability of the trip unit's operation and enhances the safety and reliability of the photovoltaic inverter system and the photovoltaic power generation system.

[0071] The photovoltaic inverter system disclosed in this application includes the aforementioned trip switch, and therefore also possesses the aforementioned structure and beneficial effects. Other structures are described in reference to relevant technologies and will not be repeated here.

[0072] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units may include steps or units not listed, but rather steps or units not listed.

[0073] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Specific technical means in some embodiments may be incorporated, in whole or in part, into another embodiment unless explicitly excluded by another embodiment. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A trip unit, characterized in that, include: The inductor assembly (100) is provided with a mounting chamber (101); A push rod (300) has a first end disposed in the mounting chamber (101) and a second end extending out of the mounting chamber (101). The inductor assembly (100) pushes the push rod (300) to move, and the push rod (300) pushes the trip piece (400) to move. An elastic component (200) is disposed within the mounting chamber (101) and restricts the travel of the push rod (300); When the inductor assembly (100) is in the initial state, the elastic assembly (200) is in the initial form and the push rod (300) is in the first initial position. When the inductor assembly (100) is in the first state, the elastic assembly (200) deforms to the first form and the push rod (300) is in the first position. When the inductor assembly (100) is in the second state, the elastic assembly (200) deforms to the second form and the push rod (300) is in the second position. The distance between the first position and the first initial position is less than the distance between the second position and the first initial position.

2. The trip unit as described in claim 1, characterized in that, The elastic component (200) includes The first elastic element (210) and the second elastic element (220) are both disposed in the mounting chamber (101) and sleeved on the push rod (300); When the elastic component (200) is in the initial state, the first elastic element (210) is compressed by the inductor component (100) or is in a natural state, and the second elastic element (220) is in a natural state. When the elastic component (200) is deformed to the first state, the first elastic element (210) is compressed by the inductor component (100), and the second elastic element (220) is in a natural state. When the elastic component (200) is deformed to the second state, both the first elastic element (210) and the second elastic element (220) are compressed by the inductor component (100).

3. The trip unit as described in claim 2, characterized in that, The inductor assembly (100) includes: The stationary core (110) is provided with the mounting chamber (101); The moving core (120) is movably disposed within the mounting chamber (101) and connected to the push rod (300); An inductor (130) is disposed in the mounting chamber (101), and the inductor (130) drives the moving core (120) to move the push rod (300); When the elastic component (200) is in the initial state, the first elastic element (210) is compressed by the moving core (120) or is in a natural state, and the second elastic element (220) is in a natural state. When the elastic component (200) is deformed to the first state, the first elastic element (210) is compressed by the moving core (120), and the second elastic element (220) is in a natural state. When the elastic component (200) is deformed to the second state, both the first elastic element (210) and the second elastic element (220) are compressed by the moving core (120).

4. The trip unit as described in claim 3, characterized in that, When the ends of the first elastic member (210) and the second elastic member (220) are aligned away from the moving core (120), in the natural state, the extension length of the first elastic member (210) is greater than the extension length of the second elastic member (220).

5. The trip unit as described in claim 4, characterized in that, The moving core (120) is provided with a positioning groove (131), and the first end of the push rod (300) is located in the positioning groove (131); The second elastic element (220) is sleeved outside the first elastic element (210). The two ends of the first elastic element (210) abut against the bottom wall of the positioning groove (131) and the inner wall of the mounting chamber (101), respectively. When the elastic component (200) is deformed to the second form, the two ends of the second elastic element (220) abut against the end face of the moving core (120) and the inner wall of the mounting chamber (101), respectively.

6. A trip switch, characterized in that, include: Install components; A trip piece (400) is movably disposed on the mounting assembly; The trip unit as claimed in any one of claims 1-5, wherein the inductor assembly (100) is disposed on the mounting assembly; When the inductor assembly (100) is in the initial state, the push rod (300) is not in contact with the trip piece (400), and the trip piece (400) is in the second initial position. When the inductor assembly (100) is in the first state, the push rod (300) pushes the trip piece (400) to the first trip position. When the inductor assembly (100) is in the second state, the push rod (300) pushes the trip piece (400) to the second trip position.

7. The trip switch as described in claim 6, characterized in that, It also includes a locking mechanism (500), which is disposed on the mounting assembly and is controlled by a first manual operating element to move between a locked position and an unlocked position. The locking mechanism (500) includes a locking surface (501). When the trip piece (400) is in the first trip position, the trip piece (400) is arranged to avoid the movement path of the locking mechanism (500) from the locking position to the unlock position. When the trip piece (400) is in the second trip position, the trip piece (400) engages with the locking surface (501) and limits the movement of the locking mechanism (500) from the locking position to the unlock position.

8. The trip switch as described in claim 6, characterized in that, The trip piece (400) is connected to the second manual operating component and is controlled by the second manual operating component to move from the second initial position to the first trip position or the second initial position; Alternatively, a reset member (410) may be slidably provided on the mounting assembly. The reset member (410) is controlled by a second manual operating member to move between a third initial position and a working position. When the reset member (410) moves from the third initial position to the working position, the reset member (410) pushes the trip piece (400) from the second initial position to the first trip position or the second initial position.

9. The trip switch as described in claim 6, characterized in that, The inductor assembly (100) is controlled by the control module (600) and is electrically connected to the control module (600); When the control module (600) does not send a signal, the inductor component (100) is in the initial state. When the control module (600) sends a first trip signal, the inductor component (100) is in the first state. When the control module (600) sends a second trip signal, the inductor component (100) is in the second state.

10. A photovoltaic inverter system, characterized in that, Including the trip switch as described in any one of claims 6-9.

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