Magnetic flux tripping device, disconnector and power supply system

Abstract

The application relates to the technical field of low-voltage electrical apparatus, in particular to a magnetic flux tripping device, a disconnecting switch and a power supply system, which comprise a support, an electromagnetic coil and a top rod; the electromagnetic coil is installed on the support, and the top rod is slidably arranged in the electromagnetic coil; at least two moving iron cores are arranged on the top rod in the electromagnetic coil and are axially spaced; when the electromagnetic coil is electrified, at least one moving iron core moves along the top rod in the axial direction and drives the top rod to move. According to the embodiment of the application, at least two moving iron cores are arranged in the magnetic flux tripping device, which is beneficial to realizing differentiated responses for different faults.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 2025204871912, filed on March 18, 2025, entitled "Magnetic Flux Trip Device, Disconnect Switch and Power Supply System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of low-voltage electrical technology, and more specifically, to a flux trip device, a disconnecting switch, and a power supply system. Background Technology

[0004] With technological advancements, traditional disconnect switches in inverters are gradually being replaced by disconnect switches with remote tripping capabilities. When the system detects faults such as overload or short circuit, the disconnect switch with a remote tripping unit can quickly control the moving contact to separate and cut off the current via a flux trip unit, protecting the electrical equipment and lines. After circuit maintenance is completed, the disconnect switch can be manually reset and the switch closed using the handle exposed on the outside of the casing, allowing the inverter to resume operation.

[0005] In practical applications, circuit systems encounter various types of faults, including simple and complex ones. Currently used flux trip units only have a single moving iron core. Regardless of the fault type, the electromagnetic coil can only drive this single core, making it impossible to differentiate between the electrical signals generated by different faults. For example, in overload and short circuit situations, the flux trip unit responds in the same way, leading to unnecessary or delayed power outages, thus affecting system stability and reliability. The lack of a targeted fault handling mechanism results in frequent false triggers or failure to cut off current in a timely manner. This not only increases the frequency of system maintenance but also increases the risk of equipment damage, thereby raising overall operating costs. Utility Model Content

[0006] The purpose of this application is to provide a flux trip unit, a disconnect switch and a power supply system. By setting at least two moving iron cores in the flux trip unit, it is beneficial to achieve differentiated responses for different faults.

[0007] The embodiments of this application are implemented as follows:

[0008] In a first aspect, embodiments of this application provide a magnetic flux trip device, including a bracket, an electromagnetic coil, and a push rod; the electromagnetic coil is mounted on the bracket, and the push rod is slidably inserted into the electromagnetic coil; within the electromagnetic coil, the push rod is provided with at least two moving iron cores arranged axially at intervals; one end of the electromagnetic coil is provided with a magnetic element, and the other end is provided with a driving element; the moving iron core near the magnetic element is magnetically pulled by the magnetic force of the magnetic element; when the electromagnetic coil is energized, at least one of the moving iron cores moves away from the magnetic element along the axial direction of the push rod, and causes the push rod to drive the driving element to move.

[0009] As an optional implementation, there are two moving iron cores; the two moving iron cores are slidably disposed within the electromagnetic coil; the push rod is provided with a protruding structure; when a first electrical signal is applied to the electromagnetic coil, the first moving iron core is driven to abut against the protruding structure and pushes the push rod to move axially; or, when a second electrical signal is applied to the electromagnetic coil, the second moving iron core is driven to abut against the first moving iron core and pushes the push rod to move axially through the protruding structure; wherein, the signal strength of the second electrical signal is greater than the signal strength of the first electrical signal;

[0010] The electromagnetic coil has a first terminal and a second terminal; when the first terminal is used as an input terminal and the second terminal is used as an output terminal, the first electrical signal is generated; when the second terminal is used as an input terminal and the first terminal is used as an output terminal, the second electrical signal is generated.

[0011] As an optional implementation, it also includes a compression spring element, one end of which abuts against a magnetic component and the other end of which abuts against a second moving iron core; the magnetic component attracts the second moving iron core, and the compression spring element compresses and stores elastic potential energy.

[0012] As an optional implementation, a receiving cavity is formed inside the second moving iron core, and the compression spring element is located inside the receiving cavity.

[0013] As an optional implementation, a return spring is also included; one end of the return spring abuts against the end of the bracket away from the magnetic element, and the other end abuts against the protruding structure; the return spring generates a force that pushes the push rod closer to the magnetic element.

[0014] As an optional implementation, it also includes an intermediate spring; one end of the intermediate spring abuts against the first moving iron core and the other end abuts against the second moving iron core; the intermediate spring generates a force that causes the first moving iron core and the second moving iron core to move away from each other.

[0015] As an optional implementation, the central axis of the push rod coincides with the central axis of the electromagnetic coil; the first moving iron core is provided with a first through hole, the second moving iron core is provided with a second through hole, and one end of the push rod passes through the first through hole and the second through hole in sequence.

[0016] Secondly, embodiments of this application provide a disconnecting switch, including the aforementioned magnetic flux trip device and operating mechanism;

[0017] The operating mechanism includes a tripping lever; the driving component of the magnetic flux trip unit abuts against the tripping lever so that the driving component can drive the operating mechanism to move synchronously, for controlling the separation of the moving and stationary contacts of the disconnecting switch;

[0018] When the first electrical signal is applied, the driving component drives the moving and stationary contacts to separate through the operating mechanism. After the first electrical signal is disconnected, the reset spring releases its elastic potential energy, causing the push rod to move axially toward the magnetic component, thereby resetting the driving component.

[0019] Alternatively, a second electrical signal is applied, and the driving component drives the moving and stationary contacts to separate via the operating mechanism. After the two electrical signals are disconnected, the push rod remains in its original position to maintain the separation state of the moving and stationary contacts.

[0020] As an optional implementation, it also includes a housing, on which a reset hole is formed; the end of the push rod away from the magnetic element extends toward the reset hole.

[0021] Thirdly, embodiments of this application provide a power supply system, including a power conversion unit and the aforementioned disconnecting switch, wherein the power conversion unit has a DC output terminal electrically connected to the disconnecting switch;

[0022] The power conversion unit includes a fault detection module for detecting faults and sending fault signals;

[0023] The power conversion unit further includes a signal conversion module, which is used to receive the fault signal and send a first electrical signal or a second electrical signal to the flux trip unit through the DC output terminal.

[0024] The beneficial effects of the embodiments of this application include:

[0025] The flux trip unit provided in this application can achieve fault differentiation capability. By employing a design with at least two moving iron cores, the specific moving iron core being driven can be adjusted according to different current signals, such as overload and short circuit, thereby achieving more accurate identification and response to different types of faults. The improvements in the embodiments of this application enable the flux trip unit to take the most appropriate countermeasures for specific types of faults, improving the reliability and stability of the system.

[0026] The disconnecting switch provided in this application embodiment can select between automatic and manual reset based on different electrical signal strengths, offering greater flexibility and adaptability. Minor faults can be quickly and automatically recovered, while severe faults require manual intervention, ensuring the safety and reliability of the system. The disconnecting switch in this application embodiment has remote control capability; through a flux trip unit, it can be opened without direct contact with the disconnecting switch. This application embodiment allows operators to operate from a safe location away from high-voltage equipment, avoiding the risks associated with direct contact with high-voltage equipment. Furthermore, the precise fault detection and response mechanism ensures rapid power cut-off in emergencies, protecting equipment and personnel safety.

[0027] The power supply system of this application embodiment features a precise fault identification and response mechanism, reducing the risk of misoperation and enhancing system stability and security. The power supply system of this application embodiment has a real-time monitoring and rapid tripping mechanism, which effectively prevents fault propagation and protects equipment and personnel safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is one of the structural schematic diagrams of the magnetic flux trip device according to an embodiment of this application;

[0030] Figure 2 This is a second schematic diagram of the magnetic flux trip device according to an embodiment of this application;

[0031] Figure 3 This is the third schematic diagram of the magnetic flux trip device according to an embodiment of this application;

[0032] Figure 4 This is the fourth schematic diagram of the magnetic flux trip device according to an embodiment of this application;

[0033] Figure 5 This is one of the structural schematic diagrams of the disconnecting switch according to an embodiment of this application;

[0034] Figure 6 This is a second schematic diagram of the structure of the disconnecting switch according to an embodiment of this application;

[0035] Figure 7 This is the third schematic diagram of the disconnecting switch in the embodiments of this application.

[0036] icon:

[0037] 100-Magnetic flux trip unit; 101-Bracket; 102-Electromagnetic coil; 103-Push rod; 104-Protruding structure; 105-First moving iron core; 106-Second moving iron core; 107-Magnetic component; 108-Compression spring element; 109-Accommodation cavity; 110-Reset spring; 111-Intermediate spring; 112-First through hole; 113-Second through hole; 114-Drive component; 115-Operating mechanism; 1150-Trip lever; 116-Housing; 117-Reset hole; 10-Handle; 22-Action mechanism; 24-Slide plate; 241-Push part; 243-Second transmission part; 26-Transmission plate; 261-First transmission part; 30-Switch unit. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0042] In practical applications, circuit systems encounter various types of faults, including simple and complex ones. Currently, the flux trip unit 100 only has one moving iron core. Regardless of the fault type, the electromagnetic coil 102 can only drive this single moving iron core, making it impossible to differentiate and respond to the electrical signals generated by different faults. For example, in cases of overload or short circuit, the flux trip unit 100 responds in the same way, leading to unnecessary or delayed power outages, thus affecting system stability and reliability. The lack of a targeted fault handling mechanism results in frequent false triggering or failure to cut off current in a timely manner. This not only increases the frequency of system maintenance but also increases the risk of equipment damage, thereby raising overall operating costs.

[0043] To address the aforementioned technical problems, this application provides a flux trip unit 100, a disconnecting switch, and a power supply system.

[0044] Reference Figure 1 , Figure 2 As shown, the magnetic flux trip device 100 provided in this embodiment includes a bracket 101, an electromagnetic coil 102, and a push rod 103. The electromagnetic coil 102 is mounted on the bracket 101, and the push rod 103 is slidably inserted into the electromagnetic coil 102. Inside the electromagnetic coil 102, the push rod 103 is provided with at least two moving iron cores arranged axially at intervals. One end of the electromagnetic coil is provided with a magnetic element 107, and the other end is provided with a driving element 114. The moving iron core near the magnetic element is magnetically pulled by the magnetic force of the magnetic element 107. When the electromagnetic coil 102 is energized, at least one moving iron core moves away from the magnetic element 107 along the axial direction of the push rod 103, and causes the push rod 103 to drive the driving element 114 to move.

[0045] It should be noted that the number of moving iron cores can be two or three, and those skilled in the art can set it as needed.

[0046] It should be noted that the embodiments of this application employ a multi-moving iron core design. Unlike traditional designs that only contain one moving iron core, the magnetic flux trip device 100 in this embodiment has at least two moving iron cores arranged axially spaced on the push rod 103. This design allows for the selective actuation of one or more moving iron cores based on different electrical signal strengths and characteristics.

[0047] It should be noted that in this embodiment, the push rod 103 is slidably inserted into the electromagnetic coil 102, and the push rod 103 can slide freely within the electromagnetic coil 102. When the electromagnetic coil 102 is energized, the electromagnetic coil 102 can drive the moving iron core and the push rod 103 to move axially.

[0048] It should be noted that, in this embodiment, the magnetic element 107 can restrict the moving iron core that is close to the magnetic element. The magnetic force generated by the magnetic element 107 pulls the moving iron core, which can keep the moving iron core in position by following the movement tendency of the magnetic element 107. When the electromagnetic coil 102 is energized after a simple fault, the magnetic element 107 can prevent the moving iron core from moving.

[0049] The technical effects that the embodiments of this application can produce are as follows:

[0050] The embodiments of this application enable fault differentiation. By employing a design with at least two moving iron cores, the specific moving iron core being driven can be adjusted according to different current signals, such as overload or short circuit, thereby achieving more accurate identification and response to different types of faults. The improvements in the embodiments of this application allow the flux trip unit 100 to take the most appropriate countermeasures for specific types of faults, improving the reliability and stability of the system.

[0051] The embodiments of this application can reduce the risk of false triggering. Because the embodiments of this application can more accurately distinguish different types of faults and handle them accordingly, unnecessary power outages are reduced, and the risk of unnecessary system shutdown due to misjudgment is effectively reduced.

[0052] The embodiments of this application can improve the maintenance efficiency of the system. The accurate fault response mechanism reduces the possibility of equipment damage, thereby reducing the maintenance frequency and cost, and helping to reduce the overall operating cost.

[0053] Reference Figure 2 , Figure 3 As shown, in one optional implementation, there are two moving iron cores; the two moving iron cores are slidably disposed within the electromagnetic coil 102; the push rod 103 is provided with a protruding structure 104; when a first electrical signal is supplied to the electromagnetic coil 102, the first moving iron core 105 is driven to abut against the protruding structure 104 and push the push rod 103 to move axially; or, when a second electrical signal is supplied to the electromagnetic coil 102, the second moving iron core 106 is driven to abut against the first moving iron core 105 and pushes the push rod 103 to move axially through the protruding structure 104; wherein, the signal strength of the second electrical signal is greater than the signal strength of the first electrical signal;

[0054] The electromagnetic coil 102 has a first terminal and a second terminal; when the circuit is connected in the correct direction, that is, when the first terminal is used as the input terminal and the second terminal is used as the output terminal, a first electrical signal is generated; when the circuit is connected in the reverse direction, that is, when the second terminal is used as the input terminal and the first terminal is used as the output terminal, a second electrical signal is generated.

[0055] It should be noted that when the first electrical signal is applied, after the driving component 114 drives the moving and stationary contacts to separate through the operating mechanism 115, that is, after the first electrical signal is disconnected, the first reset spring 110 releases elastic potential energy to make the push rod 103 move axially towards the magnetic component 107 and drive the driving component 114 to reset, so that the magnetic flux trip device can be automatically reset.

[0056] Specifically, the first moving iron core 105 drives the push rod 103 to move axially away from the magnetic component 107, while the second moving iron core 106 remains stationary. The drive component 114 drives the operating mechanism 115 to trip, thus opening the disconnecting switch. After the first electrical signal is disconnected, the reset spring 110 drives the push rod 103, the drive component 114, and the first moving iron core 105 back to their initial positions. The tripping rod 1150 returns to its initial position under the action of the spring force, completing the re-tethering. At this time, the operating mechanism 115 can be driven by the handle assembly to achieve the closing operation of the disconnecting switch.

[0057] When a second electrical signal is applied, the driving component 114 drives the moving and stationary contacts to separate via the operating mechanism 115. The elastic thrust generated by the return spring 110 is less than the electromagnetic force exerted by the electromagnetic coil 102 on the moving iron core, so as to maintain the separation state of the moving and stationary contacts.

[0058] After the second electrical signal is disconnected, automatic reset cannot be achieved, and manual reset by staff is required.

[0059] Specifically, the attraction of the reset spring 110 and the magnetic component 107 cannot overcome the reaction force of the compression spring component 108 to drive the push rod 103, the drive component 114, the first moving iron core 105, and the second moving iron core 106 back to their initial positions. The tripping rod 1150 cannot return to its initial position, and the disconnecting switch cannot be re-clamped. At this time, the operating mechanism 115 cannot be driven by the handle assembly to achieve the closing operation of the disconnecting switch. External force is required to push the drive component 114 through the push rod 103 to make the operating mechanism 115 re-clamp.

[0060] It should be noted that the embodiments of this application employ a dual-moving iron core design, with two moving iron cores within the flux trip unit 100. These two moving iron cores can slide axially within the electromagnetic coil 102. This design allows for the selective activation of different moving iron cores to perform actions based on different input electrical signals.

[0061] In this embodiment of the application, a protruding structure 104 is provided on the push rod 103. This structure is used to cooperate with the moving iron core to achieve precise motion transmission.

[0062] The embodiments of this application are based on selective operation according to the electrical signal strength:

[0063] When a first electrical signal with a relatively low signal strength is applied to the electromagnetic coil 102, the first moving iron core 105 is activated and comes into contact with the protrusion structure 104 on the push rod 103, thereby pushing the push rod 103 to move axially.

[0064] When a second electrical signal with a relatively high signal strength is applied to the electromagnetic coil 102, the second moving iron core 106 is activated and first contacts the first moving iron core 105. Then, through the first moving iron core 105, it indirectly acts on the protruding structure 104, thereby pushing the push rod 103 to move axially.

[0065] It should be noted that when a first electrical signal with a relatively weak signal strength is applied to the electromagnetic coil 102, the magnetic field generated by the electromagnetic coil 102 cannot completely cancel the magnetic field of the magnetic component 107. That is to say, the magnetic component 107 still maintains magnetic traction on the second moving iron core 106, keeping the second moving iron core 106 in its original position without moving. When a second electrical signal with a relatively strong signal strength is applied to the electromagnetic coil 102, the magnetic field generated by the electromagnetic coil 102 completely cancels the magnetic field of the magnetic component 107, balancing the magnetic force of the magnetic component 107. Combined with the thrust generated by the elastic potential energy released by the compression spring element 108, the second moving iron core 106 moves and pushes the first moving iron core 105.

[0066] This application's embodiments, by distinguishing electrical signals of varying strengths, can more accurately differentiate between different types of faults in a circuit. For example, a weaker first electrical signal may correspond to a small current fluctuation or a minor overload, while a stronger second electrical signal may indicate a serious short circuit or other emergency. This application's embodiments enable the system to take the most appropriate countermeasures for specific fault types, improving the accuracy and timeliness of the response.

[0067] It should be noted that, because it can more precisely distinguish and handle different fault states, it avoids unnecessary or delayed power outages caused by a single response mode. This is crucial for protecting electrical equipment from damage and maintaining the stable operation of the power system.

[0068] In addition, the embodiments of this application can reduce false triggering and maintenance costs. The more accurate fault detection and response mechanism reduces the number of unnecessary system downtimes, lowers maintenance frequency and costs, and reduces the risk of production interruption due to erroneous power cut-off.

[0069] Reference Figure 2 As shown, as an optional implementation, it also includes a compression spring element 108, one end of which abuts against the magnetic element 107 and the other end of which abuts against the second moving iron core 106; the magnetic element 107 attracts the second moving iron core 106, and the compression spring element 108 compresses and stores elastic potential energy.

[0070] It should be noted that, in this embodiment, the magnetic element 107 is located at one end of the electromagnetic coil 102, and its function is to magnetically attract the second moving iron core 106, thereby enabling the second moving iron core 106 to be activated under specific conditions. In this embodiment, one end of the compression spring element 108 abuts against the magnetic element 107, and the other end abuts against the second moving iron core 106. When the magnetic element 107 attracts the second moving iron core 106, the compression spring element 108 is compressed, storing elastic potential energy.

[0071] It should be noted that the design of the spring element 108 in this embodiment allows the second moving iron core 106 to quickly return to its original position after power failure or the disappearance of the electrical signal, achieving rapid reset. It should also be noted that, combined with the aforementioned dual-moving iron core design, the addition of the magnetic component 107 and the spring element 108 means that the movement of the second moving iron core 106 depends not only on the electrical signal but also on the mechanical energy stored, i.e., the elastic potential energy of the spring element 108.

[0072] Specifically, the compression spring element 108 stores elastic potential energy to drive the second moving iron core 106, the first moving iron core 105, the push rod 103, and the drive component 114 to activate the jumping operation mechanism, so that the second moving iron core 106 cannot automatically reset and can only be reset by manually pushing the push rod 103.

[0073] It should be noted that the magnetic component 107 can be a permanent magnet or other magnetic modules.

[0074] The embodiments of this application can improve the response speed and stability of the action. Specifically, in the embodiments of this application, the compression spring element 108 is compressed and stores energy when the magnetic element 107 attracts the second moving iron core 106. When it is necessary to release the second moving iron core 106, the compression spring element 108 quickly returns to its original state, pushing the second moving iron core 106 back to its initial position. This method can significantly improve the response speed of the moving iron core and ensure the stability and repeatability of its action.

[0075] In this embodiment, by introducing a compression spring element 108, the second moving iron core 106 can be quickly reset even in the event of a power outage, thus avoiding the risk of system failure due to loss of electrical signal.

[0076] Reference Figure 2 As shown, in one optional implementation, a receiving cavity 109 is formed in the second moving iron core 106, and the compression spring element 108 is located in the receiving cavity 109.

[0077] It should be noted that a receiving cavity 109 is formed inside the second moving iron core 106 to accommodate the compression spring element 108. The design of the receiving cavity 109 allows the compression spring element 108 to be more tightly integrated inside the second moving iron core 106, making the entire device more compact, reducing the space occupied, and reducing the complexity of the external structure. The compact design of the embodiments of this application helps to improve the integration and stability of the system.

[0078] Reference Figure 2 As shown, as an optional embodiment, it also includes a return spring 110; one end of the return spring 110 abuts against the end of the bracket 101 away from the magnetic member 107, and the other end abuts against the protrusion structure 104; the return spring 110 generates a force to push the push rod 103 closer to the magnetic member 107.

[0079] It should be noted that one end of the return spring 110 abuts against the end of the bracket 101 away from the magnetic component 107, and the other end abuts against the protruding structure 104 on the push rod 103. In this embodiment, the return spring 110 generates a force that pushes the push rod 103 towards the magnetic component 107. When the electromagnetic coil 102 is not energized, the return spring 110 uses its elastic potential energy to push the push rod 103 towards the magnetic component 107, restoring the system to its initial state. When the electromagnetic coil 102 is energized, the movement of the moving iron core overcomes the force of the return spring 110, pushing the push rod 103 axially to complete a specific functional action.

[0080] This embodiment of the application improves the system's reset capability. The presence of the reset spring 110 ensures that the push rod 103 can quickly return to its initial position after the electromagnetic coil 102 is de-energized, thereby achieving rapid system reset. In application scenarios requiring frequent state switching, this embodiment of the application can significantly improve the system's response speed and stability.

[0081] In addition, the reset spring 110 of this application embodiment provides a continuous pushing force, which helps to reduce the vibration and impact of the moving iron core and the push rod 103 during operation, and improves the working stability and life of the entire device.

[0082] Reference Figure 2 as well as Figure 4 As shown, as an optional implementation, it also includes an intermediate spring 111; one end of the intermediate spring 111 abuts against the first moving iron core 105 and the other end abuts against the second moving iron core 106; the intermediate spring 111 generates a force that pushes the first moving iron core 105 and the second moving iron core 106 away from each other.

[0083] The central axis of the push rod 103 coincides with the central axis of the electromagnetic coil 102; the first moving iron core 105 is provided with a first through hole 112, and the second moving iron core 106 is provided with a second through hole 113. One end of the push rod 103 passes through the first through hole 112 and the second through hole 113 in sequence.

[0084] It should be noted that in this embodiment, one end of the intermediate spring 111 abuts against the first moving iron core 105, and the other end abuts against the second moving iron core 106. This allows the intermediate spring 111 to generate a force that pushes the two moving iron cores away from each other. When the electromagnetic coil 102 is not energized, the intermediate spring 111 uses its elastic potential energy to push the first moving iron core 105 and the second moving iron core 106 away from each other, maintaining their initial distance. When the electromagnetic coil 102 is energized, depending on the strength of the input electrical signal, the moving iron cores are activated and overcome the force of the intermediate spring 111, pushing the push rod 103 to move.

[0085] Reference Figure 1 , Figure 6 As shown, the disconnecting switch provided in this application embodiment includes the above-mentioned magnetic flux trip unit 100 and operating mechanism 115;

[0086] The operating mechanism 115 includes a tripping lever 1150; the driving member 114 of the magnetic flux trip unit 100 abuts against the tripping lever 1150 so that the driving member 114 can drive the operating mechanism 115 to move synchronously, for controlling the separation of the moving and stationary contacts of the disconnecting switch.

[0087] When the first electrical signal is applied, the driving component 114 drives the moving and stationary contacts to separate through the operating mechanism 115. After the first electrical signal is disconnected, the reset spring 110 releases its elastic potential energy, causing the push rod 103 to move axially toward the magnetic component 107 and drive the driving component 114 to reset, so that the operating mechanism can drive the moving and stationary contacts to contact.

[0088] Alternatively, a second electrical signal is applied, and the driving member 114 drives the moving and stationary contacts to separate through the operating mechanism 115. The elastic thrust generated by the return spring 110 is less than the electromagnetic force exerted by the electromagnetic coil 102 on the moving iron core, so as to maintain the separation state of the moving and stationary contacts.

[0089] After the second electrical signal is disconnected, the attraction of the reset spring 110 and the magnetic component 107 cannot overcome the reaction force of the compression spring component 108 to drive the push rod 103, the drive component 114, the first moving iron core 105, and the second moving iron core 106 back to their initial positions. The tripping rod 1150 cannot return to its initial position, and the push rod 103 remains in its original position.

[0090] It should be noted that the top rod 103 of the magnetic flux trip device 100 is provided with a driving member 114. The driving member 114 is directly linked with the operating mechanism 115 of the disconnecting switch, so that when the magnetic flux trip device 100 is activated, the operating mechanism 115 of the disconnecting switch can be driven to perform corresponding actions through the driving member 114.

[0091] Furthermore, refer to Figure 5 , Figure 7 As shown, the operating mechanism 115 provided in this application embodiment includes an action mechanism 22; the handle 10 is driven to the moving contact of the switch unit 30 of the disconnecting switch through the action mechanism 22, and the handle 10 can be driven to manually open and close the switch unit 30 through the action mechanism 22.

[0092] Reference Figure 6 As shown, the drive member 114 abuts against the trip rod 1150 of the actuating mechanism. When the magnetic flux trip device 100 receives the trip signal from the power supply system, the drive member 114 can slide out relative to the bracket 101. At this time, the drive member 114 can drive the trip rod 1150 to move, thereby enabling the actuating mechanism to unlock and the disconnecting switch to open.

[0093] In some embodiments, the aforementioned actuating mechanism may include an unlocking element, a locking plate, and a tripping element; or, in other embodiments, the aforementioned operating mechanism 115 may include a lever, a spring, and a pawl. The actuating mechanisms shown in the accompanying drawings are for illustrative purposes only and are not intended to limit the actual structure of the actuating mechanism. The specific principles and working process of the actuating mechanism moving relative to the housing in a preset direction to unlock and thereby causing the switch unit 30 to change from closed to open should be understood by those skilled in the art by referring to the tripping process of disconnecting switches in the prior art, and will not be described in detail here.

[0094] For example, refer to Figure 7 As shown, the operating mechanism 115 also includes a transmission plate 26 connected to the shaft hole of the handle 10. The transmission plate 26 is provided with a first transmission part 261. The reset member includes a sliding plate 24, on which a second transmission part 243 and a pushing part 241 are provided. The first transmission part 261 and the second transmission part 243 cooperate with each other to drive the handle 10 to the reset member. The pushing part 241 abuts against the striking part on the drive member 114, and the pushing part 241 is used to drive the drive member 114 to reset.

[0095] It should be noted that when the magnetic flux trip unit 100 receives an electrical signal and activates the corresponding moving iron core, the push rod 103 will move axially, and push the operating mechanism 115 of the disconnecting switch through the driving component 114, so that the disconnecting switch is opened.

[0096] The disconnecting switch provided in this application has remote control capability, allowing for tripping control without direct contact with the switch. This application allows operators to operate from a safe location away from high-voltage equipment, avoiding the risks associated with direct contact. Furthermore, a precise fault detection and response mechanism ensures rapid power cut-off in emergencies, protecting equipment and personnel safety.

[0097] It should be noted that the magnetic flux trip unit 100 receives the first electrical signal, which drives the operating mechanism 115 of the disconnect switch via the driving component 114, causing the moving and stationary contacts to separate. Since the first electrical signal indicates a simple fault, such as overload, this embodiment requires no maintenance by personnel. Once the voltage stabilizes and the overload fault is eliminated, the first electrical signal is eliminated, and the electromagnetic coil 102 no longer generates electromagnetic force. The elastic force generated by the reset spring 110 then resets the push rod 103.

[0098] In this process, the electromagnetic coil 102 activates the first moving iron core 105, which pushes the push rod 103 to separate the moving contact of the disconnecting switch via the drive component 114. After the power is cut off, the reset spring 110 uses its stored elastic potential energy to automatically push the push rod 103 back to its initial position, completing the reset process without requiring manual reset by personnel.

[0099] When the magnetic flux trip unit 100 receives the second electrical signal and drives the moving contact to separate through the driving component 114, since the second electrical signal indicates a complex fault, the disconnecting switch needs to be tripped by the staff to troubleshoot the fault. Finally, the staff manually pushes the push rod 103 to reset it.

[0100] When the magnetic flux trip unit 100 receives the second electrical signal, the electromagnetic coil 102 activates the second moving iron core 106. The second moving iron core 106 indirectly pushes the push rod 103 through the first moving iron core 105, and drives the moving contact of the disconnecting switch to separate via the driving component 114. In this case, the elastic force of the reset spring 110 cannot reset the second moving iron core 106, and the reset process requires manual operation by the operator to push the push rod 103 back to its initial position. This application embodiment provides a safety measure to ensure that after a serious fault occurs, the operator can check the equipment status and confirm that everything is correct before performing the reset operation. This avoids the potential risks caused by automatic reset, especially in cases where further maintenance or inspection is required.

[0101] Once the fault is cleared, staff can manually reset the device.

[0102] As an optional implementation, this embodiment of the application provides a reset hole 117 on the side wall of the housing 116, wherein the end of the push rod away from the magnetic component extends toward the reset hole 117.

[0103] It should be noted that, referring to Figure 5 as well as Figure 6 As shown, the push rod 103 can be accessed through the reset hole 117 to manually reset the push rod 103. If necessary, the central axis of the push rod 103 can be aligned with the central axis of the reset hole 117 to facilitate pressing the end of the push rod 103.

[0104] The disconnect switch provided in this application embodiment can select between automatic and manual reset based on different electrical signal strengths, offering greater flexibility and adaptability. Minor faults can be quickly and automatically recovered, while severe faults require manual intervention, ensuring the safety and reliability of the system.

[0105] For serious faults, the manual reset mechanism ensures that staff have the opportunity to conduct a comprehensive inspection before resetting, avoiding secondary faults or safety hazards that may be caused by automatic reset. For minor faults, the automatic reset mechanism reduces the need for manual intervention, simplifies the operation process, and improves the system's response speed and efficiency.

[0106] The power supply system provided in this application embodiment includes a power conversion unit and the aforementioned disconnecting switch. The power conversion unit has a DC output terminal that is electrically connected to the disconnecting switch.

[0107] The power conversion unit includes a fault detection module for detecting faults and sending fault signals;

[0108] The power conversion unit also includes a signal conversion module, which is used to receive fault signals and send a first electrical signal or a second electrical signal to the flux trip unit 100 through the DC output terminal.

[0109] The power supply system of this application embodiment features a precise fault identification and response mechanism, reducing the risk of misoperation and enhancing system stability and security. The power supply system of this application embodiment has a real-time monitoring and rapid tripping mechanism, which effectively prevents fault propagation and protects equipment and personnel safety.

[0110] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A magnetic flux tripping device (100), characterized in that, The device includes a support (101), an electromagnetic coil (102), and a push rod (103). The electromagnetic coil (102) is mounted on the support (101), and the push rod (103) is slidably inserted into the electromagnetic coil (102). Inside the electromagnetic coil (102), the push rod (103) is provided with at least two moving iron cores arranged axially at intervals. One end of the electromagnetic coil is provided with a magnetic element (107), and the other end is provided with a driving element (114). The moving iron core near the magnetic element is pulled by the magnetic force of the magnetic element (107). When the electromagnetic coil (102) is energized, at least one of the moving iron cores moves away from the magnetic element (107) along the axial direction of the push rod (103), and causes the push rod (103) to drive the driving element (114) to move.

2. The magnetic flux trip unit (100) according to claim 1, characterized in that There are two moving iron cores; the two moving iron cores are slidably disposed within the electromagnetic coil (102); the push rod (103) is provided with a protruding structure (104); when a first electrical signal is supplied to the electromagnetic coil (102), the first moving iron core (105) is driven to abut against the protruding structure (104) and push the push rod (103) to move axially; or, when a second electrical signal is supplied to the electromagnetic coil (102), the second moving iron core (106) is driven to abut against the first moving iron core (105) and pushes the push rod (103) to move axially through the protruding structure (104); wherein, the signal strength of the second electrical signal is greater than the signal strength of the first electrical signal; The electromagnetic coil (102) has a first terminal and a second terminal; when the first terminal is used as an input terminal and the second terminal is used as an output terminal, the first electrical signal is generated; when the second terminal is used as an input terminal and the first terminal is used as an output terminal, the second electrical signal is generated.

3. The magnetic flux trip unit (100) according to claim 2, characterized in that It also includes a compression spring element (108), one end of which abuts against a magnetic element (107) and the other end of which abuts against a second moving iron core (106); the magnetic element (107) attracts the second moving iron core (106), and the compression spring element (108) compresses and stores elastic potential energy.

4. The magnetic flux trip unit (100) according to claim 3, characterized in that A receiving cavity (109) is formed inside the second moving iron core (106), and the compression spring element (108) is located inside the receiving cavity (109).

5. The magnetic flux trip unit (100) according to any one of claims 2-4, characterized in that, It also includes a return spring (110); one end of the return spring (110) abuts against the end of the bracket (101) away from the magnetic element (107), and the other end abuts against the protruding structure (104); the return spring (110) generates a force that pushes the push rod (103) closer to the magnetic element (107).

6. The magnetic flux trip unit (100) according to any one of claims 2-4, characterized in that, It also includes an intermediate spring (111); one end of the intermediate spring (111) abuts against the first moving iron core (105) and the other end abuts against the second moving iron core (106); the intermediate spring (111) generates a force that causes the first moving iron core (105) and the second moving iron core (106) to move away from each other.

7. The magnetic flux trip unit (100) according to any one of claims 2-4, characterized in that, The central axis of the push rod (103) coincides with the central axis of the electromagnetic coil (102); the first moving iron core (105) is provided with a first through hole (112), and the second moving iron core (106) is provided with a second through hole (113). One end of the push rod (103) passes through the first through hole (112) and the second through hole (113) in sequence.

8. A disconnector, characterized in that Includes the magnetic flux trip unit (100) and operating mechanism (115) as described in any one of claims 2-7; The operating mechanism (115) includes a tripping lever (1150); the driving member (114) of the magnetic flux trip device (100) abuts against the tripping lever (1150) so that the driving member (114) can drive the operating mechanism (115) to move synchronously, for controlling the separation of the moving and stationary contacts of the disconnecting switch; When the first electrical signal is applied, the driving member (114) drives the moving and stationary contacts to separate through the operating mechanism (115). After the first electrical signal is disconnected, the push rod (103) is pushed along the axial direction by the elastic force and moves closer to the magnetic member (107) and drives the driving member (114) to reset, so that the operating mechanism can drive the moving and stationary contacts to contact. Alternatively, a second electrical signal is applied, and the driving member (114) drives the moving and stationary contacts to separate through the operating mechanism (115). After the second electrical signal is disconnected, the push rod (103) remains in its original position so that the moving and stationary contacts are kept in the separated state.

9. The disconnector according to claim 8, characterized in that It also includes a housing (116), on which a reset hole (117) is provided; the end of the push rod away from the magnetic component (107) extends toward the reset hole (117).

10. A power supply system characterized by comprising: Includes a power conversion unit and the disconnecting switch as described in claim 8 or 9, wherein the power conversion unit has a DC output terminal electrically connected to the disconnecting switch; The power conversion unit includes a fault detection module for detecting faults and sending fault signals; The power conversion unit further includes a signal conversion module for receiving the fault signal and sending a first electrical signal or a second electrical signal to the flux trip unit (100) through the DC output terminal.

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