Single-phase quick-break device and control method

Abstract

The invention discloses a single-phase quick-break device and an operation method, and the device comprises a box body which is provided with a unique dynamic sealing hole; a solid-sealed polar pole, wherein the solid-sealed polar pole is fixedly connected with the box body; the magnetic control mechanism is arranged in the box body; the main shaft penetrates through the unique dynamic sealing hole in the box body, and one end of the main shaft is connected with the magnetic control mechanism; the indicating handle is positioned outside the box body and is connected with the other end of the main shaft; the magnetic control mechanism drives the main shaft to rotate and drives the indication handle to rotate so as to indicate the state of the device, and the indication handle is pulled to drive the main shaft to rotate so as to drive the magnetic control mechanism to execute opening operation. The invention aims to reduce the number of dynamic sealing holes on the pole-mounted circuit breaker box body, reduce the risk of water vapor and dust invasion, improve the operation reliability and the service life of equipment, and reduce the workload of field maintenance at the same time.

Description

A single-phase instantaneous trip device and its operating method Technical Field

[0001] This invention belongs to the field of power distribution network technology, specifically relating to a single-phase instantaneous tripping device and its operating method. Background Technology

[0002] In 10kV distribution network construction, pole-mounted circuit breakers are one of the core devices for line segmentation and protection. Currently, the widely used pole-mounted circuit breakers mainly adopt a three-phase common enclosure structure, represented by the ZW20 and ZW32 models. This type of circuit breaker integrates the three-phase arc-extinguishing chamber, operating mechanism, and control unit into a common enclosure, resulting in a relatively compact overall structure.

[0003] To meet the needs of on-site operation and maintenance under outdoor conditions, these circuit breakers typically require multiple external operating and indicating components, including closing / opening indicators for observing equipment status, manual closing / opening handles for manual operation, and energy storage handles for energy storage. These components all need to be led to the outside through openings in the enclosure to achieve their operating or indicating functions. A dynamic sealing structure is required at the connection between each leading component and the enclosure to ensure isolation between the enclosure's interior and the external environment.

[0004] Taking typical ZW20 and ZW32 circuit breakers as examples, their enclosures generally have at least three dynamic sealing holes, corresponding to components such as the closing / opening indicator, manual opening handle, and energy storage handle. Furthermore, some products have additional functional components, further increasing the number of dynamic sealing holes. During actual operation, the dynamic sealing areas are subjected to wear from mechanical movement and the effects of outdoor temperature changes, making them vulnerable to moisture and dust intrusion. The presence of multiple dynamic sealing holes means multiple potential leakage risk points; failure of any seal can lead to water ingress into the enclosure, causing corrosion, reduced insulation performance, and other problems, severely impacting the equipment's operational reliability and service life. Simultaneously, the presence of multiple sealing points increases the workload of on-site maintenance, requiring maintenance personnel to regularly inspect the condition of each sealing component and perform necessary repairs. Summary of the Invention

[0005] To address the problems existing in the prior art, the present invention provides a single-phase instantaneous trip device and operating method, the purpose of which is to reduce the number of dynamic sealing holes on the pole-mounted circuit breaker box, reduce the risk of water vapor and dust intrusion, improve the reliability and service life of the equipment, and at the same time reduce the amount of on-site maintenance work.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: According to a first aspect of the present invention, a single-phase instantaneous trip device is provided, comprising: a housing, wherein the housing is provided with a single dynamic sealing hole; a fixed sealing pole, wherein the fixed sealing pole is fixedly connected to the housing; a magnetic control mechanism, wherein the magnetic control mechanism is disposed inside the housing; a main shaft, wherein the main shaft passes through the single dynamic sealing hole on the housing, and one end of the main shaft is connected to the magnetic control mechanism; and an indicator handle, wherein the indicator handle is located outside the housing and is connected to the other end of the main shaft; the magnetic control mechanism drives the main shaft to rotate, thereby causing the indicator handle to rotate to indicate the state of the device, and pulling the indicator handle can drive the main shaft to rotate, thereby causing the magnetic control mechanism to perform a tripping operation.

[0007] In one possible implementation of the first aspect, an arc-extinguishing chamber is provided inside the solid-sealed pole, and the device further includes an insulating rod, one end of which is connected to the arc-extinguishing chamber, and the other end of which passes through the housing and is connected to the magnetic control mechanism.

[0008] In one possible implementation of the first aspect, the solid-sealed pole is provided with an inlet terminal and an outlet terminal, the inlet terminal and the outlet terminal being electrically connected to the arc-extinguishing chamber inside the solid-sealed pole, respectively.

[0009] In one possible implementation of the first aspect, the insulating rod is provided with a self-locking nut, and the insulating rod is connected to the magnetic control mechanism through the self-locking nut.

[0010] In one possible implementation of the first aspect, the solid-sealed pole is provided with an input-side power harvesting capacitor and an output-side power harvesting capacitor, the housing is provided with a power harvesting device, and the input-side power harvesting capacitor and the output-side power harvesting capacitor are respectively electrically connected to the power harvesting device.

[0011] In one possible implementation of the first aspect, the solid-sealed pole is provided with an incoming voltage sensor, an outgoing voltage sensor and a current sensor, the current sensor is provided with a current sensor secondary terminal, the housing is provided with a voltage and current acquisition box, and the incoming voltage sensor, the outgoing voltage sensor and the current sensor secondary terminal are respectively electrically connected to the voltage and current acquisition box.

[0012] In one possible implementation of the first aspect, a terminal sealing ring is provided at the connection between the solid-sealed terminal and the housing.

[0013] According to a second aspect of the present invention, an operating method for a single-phase instantaneous trip device is provided, applied to the single-phase instantaneous trip device, comprising the following steps: driving the main shaft to rotate via the magnetic control mechanism, the main shaft driving the indicator handle to rotate to a corresponding position to indicate whether the device is in a closed or open state; when manual tripping is required, pulling the indicator handle, the indicator handle driving the main shaft to rotate in the opposite direction, the main shaft driving the magnetic control mechanism to perform the tripping operation.

[0014] In one possible implementation of the second aspect, the steps further include: fixing the single-phase instantaneous trip device to the mounting hardware through the mounting hole of the housing; and electrically connecting the incoming and outgoing terminals of the single-phase instantaneous trip device to the primary circuit respectively.

[0015] In one possible implementation of the second aspect, when applied to a single-phase two-wire circuit, the two single-phase quick-break devices are connected to the live wire and the neutral or ground wire respectively; when applied to a three-phase circuit, the three single-phase quick-break devices are connected to phase A, phase B, and phase C respectively, and the phase spacing between the three phases is adjusted by adjusting the fixed position of each single-phase quick-break device on the mounting hardware.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: The single-phase instantaneous trip device provided by the present invention has only one dynamic sealing hole on its housing. The fixed sealing pole is fixedly connected to the housing, and the magnetic control mechanism is located inside the housing. The main shaft passes through this single dynamic sealing hole. One end of the main shaft is connected to the magnetic control mechanism, and the other end is connected to an indicator handle located outside the housing. When the magnetic control mechanism drives the main shaft to rotate, it can drive the indicator handle to rotate and indicate the status of the device. Pulling the indicator handle can also drive the main shaft to rotate, thereby driving the magnetic control mechanism to perform the tripping operation. With this structure, the status indication function and the manual tripping function are realized through the same main shaft and the same handle. The two functions that originally needed to be led out of the housing separately are integrated into one. This means that only one dynamic sealing hole is needed on the housing to meet the lead-out requirements of the two functions. Compared with the structure of the prior art that requires more than three dynamic sealing holes, the number of dynamic sealing holes is greatly reduced. The dynamic sealing part is the weak link of the housing's sealing performance. It is subject to mechanical wear and temperature changes over a long period of time and is easily made into a channel for moisture and dust intrusion. Reducing the number of dynamic sealing holes reduces potential leakage points, effectively lowering the likelihood of external moisture and dust entering the enclosure, making the device's seal more reliable and ensuring stable long-term operation. Simultaneously, the improved sealing performance allows the device to meet IP67 protection requirements, enabling maintenance-free operation and reducing the workload of maintenance personnel in periodically inspecting the sealing components. Furthermore, integrating indication and manual operation functions into a single handle eliminates the need to locate multiple different parts, making manual tripping more intuitive and convenient, thus improving on-site operational efficiency.

[0017] This invention provides an operation method for a single-phase instantaneous trip device. The method involves a magnetic control mechanism driving a main shaft to rotate, which in turn rotates an indicator handle to a corresponding position to indicate the device's status. When manual tripping is required, pulling the indicator handle drives the main shaft to rotate in the opposite direction, which in turn drives the magnetic control mechanism to perform the tripping operation. Based on these steps, automatic status indication and manual tripping are completed using the same handle, sharing a common transmission path. This method allows operators to directly determine the device's status by observing the current position of the indicator handle during manual tripping, and then pull the same handle to complete the tripping. The operation is seamless and natural, eliminating the need to switch between different components. Furthermore, since the indication and operation functions are integrated into a single handle, the number of external operating components is reduced, resulting in a simpler and clearer interface and reducing the possibility of misoperation. For on-site maintenance personnel, especially in emergency situations, this simplified operation facilitates quick and accurate tripping, improving fault handling efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 is an overall isometric view of a single-phase instantaneous tripping device of the present invention from a certain perspective.

[0020] Figure 2 is an overall isometric view of a single-phase instantaneous tripping device of the present invention from another perspective.

[0021] Figure 3 is an isometric view of the solid-sealed pole structure in a single-phase instantaneous tripping device of the present invention from one perspective.

[0022] Figure 4 is an isometric view of the solid-sealed pole structure in a single-phase instantaneous tripping device of the present invention from another perspective.

[0023] Figure 5 is an isometric view of the lifting ring in a single-phase quick-break device of the present invention.

[0024] Figure 6 is an isometric view of the relevant structure of the housing in a single-phase instantaneous tripping device of the present invention from one perspective.

[0025] Figure 7 is an isometric view of the relevant structure of the housing in a single-phase instantaneous tripping device of the present invention from another perspective.

[0026] Figure 8 is a plan view of a single-phase instantaneous tripping device of the present invention from a certain perspective.

[0027] Figure 9 is a plan view of a single-phase instantaneous tripping device of the present invention from a certain perspective.

[0028] Figure 10 is an isometric view of a single-phase instantaneous tripping device of the present invention from a certain perspective.

[0029] Figure 11 is a plan view of the housing in a single-phase instantaneous tripping device of the present invention from a certain perspective.

[0030] In the diagram: 1. Solid-sealed pole; 2. Housing; 3. M8 socket head cap screw kit; 4. Magnetic control mechanism; 5. Mechanism bolt kit; 6. Self-locking nut; 7. Voltage and current acquisition box; 8. Power supply device; 10. Spindle bushing; 11. Spindle; 12. Position signal assembly; 13. Indicator handle; 101. Inlet terminal; 102. Outlet terminal; 103. Lifting ring; 1031. Stainless steel threaded sleeve; 10311. Positioning hole; 1032. Stainless steel ring; 104. Outlet side voltage sensor; 105. 106. Line-side voltage sensor; 107. Outgoing line-side energy harvesting capacitor; 108. Incoming line-side energy harvesting capacitor; 109. Current sensor secondary terminal; 110. Insulating pull rod; 111. Pole seal ring; 201. First pole mounting hole; 202. Second pole mounting hole; 203. Open / close indicator; 204. Manual open / close indicator; 205. Copper sleeve; 206. Insulating pull rod bushing; 207. Lifting handle; 208. Nameplate mounting plate; 209. Grounding bushing; 210. Aviation plug mounting flange; 210. Housing mounting hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Referring to Figures 1, 2, 3, and 4, this embodiment provides a single-phase instantaneous trip device. The device mainly includes a fixed-seal pole 1, a housing 2, a magnetic control mechanism 4, a main shaft 11, and an indicating handle 13. The housing 2 has a single dynamic sealing hole. The fixed-seal pole 1 is fixedly connected to the housing 2. The magnetic control mechanism 4 is installed inside the housing 2. The main shaft 11 passes through the single dynamic sealing hole on the housing 2. One end of the main shaft 11 is connected to the magnetic control mechanism 4, and the other end is located outside the housing 2 and connected to the indicating handle 13. When the magnetic control mechanism 4 drives the main shaft 11 to rotate, the main shaft 11 drives the indicating handle 13 to rotate. The indicating handle 13 pointing to different positions indicates whether the device is currently in the closed or open state.

[0033] When manual tripping is required, the operator simply pulls down the indicator handle 13. The indicator handle 13 drives the main shaft 11 to rotate in the opposite direction, and the main shaft 11 drives the magnetic control mechanism 4 to perform the tripping operation. The device integrates energy harvesting and sampling functions, eliminating the need for an externally powered voltage transformer. Its internal transmission achieves the opening and closing of the arc-extinguishing chamber through the opening and closing motion of the magnetic control mechanism 4. At the same time, the transmission of the magnetic control mechanism 4 is linked to the main shaft 11, which has both indication and manual tripping functions. Therefore, the entire device has only one dynamic sealing hole, achieving high integration and structural simplification.

[0034] This embodiment integrates the status indication function and the manual tripping function onto the same spindle 11 and the same indicator handle 13, so that only one dynamic sealing hole is needed on the housing 2 to simultaneously meet the requirements of both functions. Compared with the prior art which requires more than three dynamic sealing holes, this embodiment significantly reduces the number of dynamic sealing holes. The fewer the number of dynamic sealing holes, the lower the risk of moisture and dust intrusion, the higher the sealing reliability and operational stability of the equipment, and the less on-site maintenance workload is required.

[0035] In one possible implementation, referring to Figures 3 and 4, an arc-extinguishing chamber is provided inside the solid-sealed pole 1. The device also includes an insulating rod 109, one end of which is connected to the arc-extinguishing chamber, and the other end passes through the housing 2 and is connected to the magnetic control mechanism 4. When the magnetic control mechanism 4 performs a closing or opening operation, the insulating rod 109 moves up and down with the magnetic control mechanism 4, thereby driving the arc-extinguishing chamber to perform a closing or opening operation.

[0036] In this embodiment, the power transmission between the magnetic control mechanism 4 and the arc-extinguishing chamber is achieved through the insulating pull rod 109. The structure is simple and reliable, and the movement is smooth.

[0037] In one possible implementation, referring to Figures 3 and 4, the solid-sealed pole 1 is provided with an inlet terminal 101 and an outlet terminal 102. The inlet terminal 101 and the outlet terminal 102 are electrically connected to the arc-extinguishing chamber inside the solid-sealed pole 1, respectively, for connecting to an external primary circuit.

[0038] In one possible implementation, referring to Figures 8 and 9, a self-locking nut 6 is provided on the insulating rod 109, and the insulating rod 109 is connected to the magnetic control mechanism 4 through the self-locking nut 6. Using the self-locking nut 6 ensures that the connection will not loosen during long-term operation, improving transmission reliability.

[0039] In one possible implementation, referring to Figures 4 and 9, the solid-sealed terminal 1 is equipped with an input-side power extraction capacitor 107 and an output-side power extraction capacitor 106, and the housing 2 is equipped with a power extraction device 8. The input-side power extraction capacitor 107 and the output-side power extraction capacitor 106 are electrically connected to the power extraction device 8. The input-side power extraction capacitor 107 and the output-side power extraction capacitor 106 are connected to the input and output lines of the solid-sealed terminal 1, respectively, for connection to the power extraction device 8 installed inside the housing 2, thereby realizing capacitor power extraction output.

[0040] This embodiment utilizes a capacitor to directly draw power from the primary circuit, providing operating power to the internal control unit, communication module, etc., without the need for an additional voltage transformer (PT), simplifying on-site installation and reducing material costs.

[0041] In one possible implementation, referring to Figures 4 and 9, the solid-enclosed pole 1 is equipped with an incoming-side voltage sensor 105, an outgoing-side voltage sensor 104, and a current sensor. The current sensor has a secondary terminal 108. A voltage and current acquisition box 7 is installed inside the enclosure 2. The incoming-side voltage sensor 105, the outgoing-side voltage sensor 104, and the secondary terminal 108 of the current sensor are electrically connected to the voltage and current acquisition box 7. The voltage and current acquisition box 7 has high-precision phase voltage, phase current, zero-sequence voltage, and zero-sequence current acquisition functions, enabling it to perform small-current grounding fault detection and line loss calculation. The incoming-side voltage sensor 105 and the outgoing-side voltage sensor 104 are connected to the incoming and outgoing lines of the solid-enclosed pole 1, respectively, for connection to the voltage and current acquisition box 7 installed inside the enclosure 2, thereby realizing the secondary signal return of the primary line.

[0042] During installation, the installation sequence is as follows: first fix the voltage and current acquisition box 7, and then connect the leads of the voltage and current acquisition box 7 to the input voltage sensor 105, the output voltage sensor 104, and the secondary terminal 108 of the current sensor.

[0043] This embodiment adopts a built-in sensor design, which realizes deep primary and secondary fusion without the need for external current transformers and acquisition terminals, thus improving the accuracy of signal acquisition and anti-interference capability.

[0044] In one possible implementation, referring to Figure 4, a terminal sealing ring 110 is provided at the connection between the sealed terminal 1 and the housing 2. The terminal sealing ring 110 achieves a sealing effect when the sealed terminal 1 and the housing 2 are fixed together, preventing moisture and dust from entering from the connection.

[0045] In one possible implementation, referring to Figures 3 and 5, a lifting ring 103 is fixedly mounted on the inlet terminal 101. The lifting ring 103 is composed of a stainless steel threaded sleeve 1031 and a stainless steel ring 1032 welded together. The stainless steel threaded sleeve 1031 is threadedly connected to the inlet terminal 101, and positioning holes 10311 are provided on both sides of the stainless steel threaded sleeve 1031 for positioning the lifting ring 103 when it is fixed to the inlet end of the sealed pole 1, preventing it from rotating out during the lifting process.

[0046] The lifting ring 103 in this embodiment can be used for mechanical lifting or manual handling, adapting to the needs of different installation scenarios. The design of the positioning hole 10311 ensures safety and reliability during the lifting process.

[0047] In one possible implementation, referring to Figures 4 and 6, the fixed-end post 1 is provided with a first post mounting hole 111, and the housing 2 is correspondingly provided with a second post mounting hole 201. The fixed-end post 1 and the housing 2 are fixedly connected by fasteners passing through the first post mounting hole 111 and the second post mounting hole 201. In this embodiment, an M8 socket head cap screw kit 3 is used for fixing, and a total of four M8 socket head cap screw kits are used.

[0048] In one possible implementation, referring to Figures 1 and 6, the only dynamic sealing hole includes a spindle hole and a copper sleeve 204 disposed within the spindle hole, with the spindle 11 passing through the copper sleeve 204. The copper sleeve 204 serves a wear-resistant and guiding function, ensuring that the spindle 11 rotates flexibly and reliably over a long period of time.

[0049] In one possible implementation, referring to Figures 6 and 11, the housing 2 is provided with an open / close indicator 202. When the indicator handle 13 is rotated, it points to the corresponding position of the open / close indicator 202, and the user can intuitively determine whether the device is in the closed or open state.

[0050] In one possible implementation, referring to Figure 6, a manual trip indicator 203 is provided on the housing 2. The manual trip indicator 203 is used to prompt the user to manually trip the circuit breaker by pulling the indicator handle 13.

[0051] In one possible implementation, referring to Figures 6 and 7, an insulating pull rod bushing 205 is provided inside the housing 2, and the insulating pull rod 109 passes through the insulating pull rod bushing 205. The insulating pull rod bushing 205 is used to position the insulating pull rod 109, ensure its coaxiality of movement, and reduce friction and wear.

[0052] In one possible implementation, referring to Figure 6, lifting handles 206 are provided on both sides of the box 2 to facilitate manual handling.

[0053] In one possible implementation, referring to Figure 6, a nameplate mounting plate 207 is provided on the housing 2 for mounting a nameplate, which indicates the device model, technical parameters, manufacturer and other information.

[0054] In one possible implementation, referring to Figure 7, a grounding bushing 208 is provided on the housing 2 for installing a grounding indicator or connecting a grounding wire.

[0055] In one possible implementation, referring to Figure 7, the housing 2 is provided with an aviation plug mounting flange 209 for mounting an aviation plug, through which signal transmission and control signal reception are performed with the outside.

[0056] In one possible implementation, referring to Figure 7, the housing 2 is provided with housing mounting holes 210 for fixing the device to mounting hardware or other support structures.

[0057] In one possible implementation, referring to Figures 4 and 9, the power extraction device 8 includes two units, which are electrically connected to the input-side power extraction capacitor 107 and the output-side power extraction capacitor 106 respectively. The installation sequence is as follows: first, connect the leads of the voltage and current acquisition box 7 to the input-side voltage sensor 105, the output-side voltage sensor 104, and the secondary terminal 108 of the current sensor; then, connect the leads of the two power extraction devices 8 to the input-side power extraction capacitor 107 and the output-side power extraction capacitor 106; and finally, fix the two power extraction devices 8 in place.

[0058] In one possible implementation, referring to Figures 8 and 9, the magnetic control mechanism 4 is fixed to the housing 2 by a set of mechanism bolts 5. In this embodiment, four sets of mechanism bolts 5 are used to fix the magnetic control mechanism 4 to the second pole post mounting hole 201.

[0059] In one possible implementation, referring to Figure 10, spindle sleeves 10 are respectively fitted at both ends of the spindle 11, and the spindle sleeves 10 are fixed to the housing 2. The spindle sleeves 10 provide support and positioning for the spindle 11, ensuring smooth rotation of the spindle 11.

[0060] In one possible implementation, referring to Figure 10, a position signal component 12 is provided on the magnetic control mechanism 4. When the magnetic control mechanism 4 moves, it triggers a change in the normally open or normally closed contact of the position signal component 12, thereby transmitting a position signal to the control unit and realizing remote status monitoring. The magnetic control mechanism 4 moves by triggering a change in the normally open or normally closed contact of the position signal component 12 to transmit a position signal.

[0061] In one feasible implementation, the device weighs only 30kg. An average adult can lift it with both hands, offering a significant advantage in mountainous and forested areas inaccessible to engineering vehicles, as well as in post-disaster emergency repair sites. The device's weight of just 30kg, easily lifted by an average adult, is particularly advantageous in complex installation environments, such as mountainous forests inaccessible to engineering vehicles, or sites urgently requiring power restoration after natural disasters like heavy rain or other incidents.

[0062] This invention also provides an operating method for a single-phase instantaneous trip device, applied to the aforementioned single-phase instantaneous trip device. The method includes the following steps: The main shaft 11 is driven to rotate by the magnetic control mechanism 4, and the main shaft 11 drives the indicating handle 13 to rotate to the corresponding position, indicating whether the device is in a closed or open state. When manual tripping is required, the indicating handle 13 is pulled, causing the indicating handle 13 to drive the main shaft 11 to rotate in the opposite direction, and the main shaft 11 drives the magnetic control mechanism 4 to perform the tripping operation. The indicating handle 13 has both indicating and manual tripping functions and is designed to prevent damage from pulling.

[0063] This embodiment integrates automatic indication and manual tripping operation into the same handle, making operation simple and intuitive, eliminating the need to locate multiple operating parts, and improving operational efficiency and safety.

[0064] In one possible implementation, the method further includes the following steps: fixing the single-phase instantaneous trip device to the mounting hardware through the housing mounting hole 210, and then electrically connecting the incoming terminal 101 and outgoing terminal 102 of the single-phase instantaneous trip device to the primary circuit respectively. During installation, mechanical lifting can be performed using the lifting ring 103, or manual handling can be performed using the lifting handle 206.

[0065] In one feasible implementation, when applied to a single-phase two-wire circuit, two single-phase quick-break devices are used. The incoming terminal 101 and outgoing terminal 102 of one device are connected to the live wire, and the incoming terminal 101 and outgoing terminal 102 of the other device are connected to the neutral or ground wire. When applied to a three-phase circuit, three single-phase quick-break devices are used. The incoming terminal 101 and outgoing terminal 102 of each device are connected to phase A, phase B, and phase C, respectively. The phase spacing between the three phases is adjusted by adjusting the fixed position of each single-phase quick-break device on the mounting hardware.

[0066] In 10kV distribution networks, a two-wire design with one live phase and one neutral or ground wire is sometimes used to meet the requirements of single-phase AC power transmission. This design reduces material costs, simplifies construction, and helps reduce mutual interference between lines, improving transmission stability. In this application scenario, only two single-phase instantaneous trip devices are needed to open and close one branch line, reducing material and construction costs, and multiple branch lines can be opened as needed. In addition to the above functions, three single-phase instantaneous trip devices can also be used together as conventional circuit breakers, and their mechanical and electrical performance meet the current technical specifications of the State Grid and Southern Power Grid. When used as circuit breakers, the phase spacing can be flexibly adjusted according to the installation hardware, allowing for live installation and maintenance.

[0067] The modular application approach of this embodiment allows the device to flexibly adapt to different line types, reducing material and construction costs. Only two devices are needed in single-phase two-wire lines, while in three-phase lines, the phase spacing can be flexibly adjusted as needed to accommodate the diverse requirements of different tower structures and installation hardware.

[0068] In addition, single-phase instantaneous trip devices have the ability to interrupt short-circuit currents, as well as the ability to restore transient faults and isolate permanent faults. Therefore, they do not need to be frequently sent to the field for maintenance like fuses. Furthermore, single-phase instantaneous trip devices have a variety of configuration options, including traveling wave ranging.

[0069] Based on the above embodiments, the specific assembly process and working principle of the device will be further explained below.

[0070] Referring to Figures 1 to 4, the solid-sealed terminal 1 is manufactured using an epoxy resin vacuum casting process. Internally, it integrates an arc-extinguishing chamber, an input-side energy harvesting capacitor 107, an output-side energy harvesting capacitor 106, an input-side voltage sensor 105, an output-side voltage sensor 104, and a current sensor. This integrated casting structure completely encapsulates the high-voltage primary components with solid insulation material, eliminating internal air gaps, improving insulation reliability, and reducing the impact of the external environment on internal components. The input terminal 101 and the output terminal 102 are made of copper with a silver-plated surface, providing excellent conductivity and oxidation resistance.

[0071] During assembly, first, the insulating pull rod 109 is passed through the insulating pull rod bushing 205 on the housing 2. One end of the insulating pull rod 109 is connected to the magnetic control mechanism 4 via a self-locking nut 6, and the other end is connected to the arc-extinguishing chamber inside the solidified pole post 1. The self-locking nut 6 adopts a nylon anti-loosening structure, which will not loosen on its own under vibration, ensuring reliable transmission connection. Then, the solidified pole post 1 is aligned with the housing 2, so that the first pole post mounting hole 111 is aligned with the second pole post mounting hole 201. After installing the pole post sealing ring 110, the two are fixed with a set of four M8 socket head cap bolts 3. The pole post sealing ring 110 is made of nitrile rubber material, which has good oil resistance and aging resistance, and forms a reliable static seal after compression.

[0072] During spindle 11 assembly, spindle sleeves 10 are first fitted onto both ends of spindle 11, and then spindle 11 is passed through the spindle hole on housing 2 and the copper sleeve 204. The copper sleeve 204 is made of tin bronze and has an oil reservoir machined on its inner wall. After adding grease, it can ensure that spindle 11 rotates flexibly for a long time. One end of spindle 11 is connected to the output shaft of magnetic control mechanism 4, and the other end is connected to indicator handle 13. Position signal component 12 is installed on magnetic control mechanism 4 and adopts a micro switch structure. When magnetic control mechanism 4 moves, it triggers the normally open and normally closed contacts of the switch to switch, outputting a position signal to control unit.

[0073] The power extraction device 8 and the voltage and current acquisition box 7 are installed inside the housing 2. The installation sequence is as follows: First, fix the voltage and current acquisition box 7, and connect its leads to the input voltage sensor 105, the output voltage sensor 104, and the secondary terminal 108 of the current sensor; then, connect the leads of the two power extraction devices 8 to the input energy harvesting capacitor 107 and the output energy harvesting capacitor 106 respectively; finally, fix the two power extraction devices 8 with screws. The power extraction device 8 uses high-frequency switching power supply technology to convert the electrical energy collected by the capacitors into a stable DC voltage to power the control unit, communication module, and other loads.

[0074] During operation, the primary line current flows into the input terminal 101, passes through the arc-extinguishing chamber, and flows out from the output terminal 102. The input-side energy extraction capacitor 107 and the output-side energy extraction capacitor 106 couple electrical energy from the input and output sides respectively, and the output power is processed by the power extraction device 8. The input-side voltage sensor 105 and the output-side voltage sensor 104 use the capacitive voltage divider principle to convert high voltage into low voltage signals; the current sensor uses the Rogowski coil principle to convert primary current into voltage signals. After processing by the voltage and current acquisition box 7, high-precision phase voltage, phase current, zero-sequence voltage, and zero-sequence current data are obtained for protection judgment and line loss calculation.

[0075] When a line fault occurs, the control unit determines the fault type based on the data collected by the voltage and current acquisition box 7. If it is a transient fault, the control unit issues a closing command, the magnetic control mechanism 4 activates, and the arc-extinguishing chamber closes via the insulating pull rod 109 to restore power. If it is a permanent fault, the control unit issues a tripping command and maintains the tripped state, isolating the faulty line. When the magnetic control mechanism 4 activates, it drives the main shaft 11 to rotate, which in turn drives the indicator handle 13 to the corresponding position of the open / closed indicator 202, indicating the device status. Simultaneously, the position signal component 12 outputs a position signal to the control unit for remote monitoring.

[0076] When manual tripping is required, the operator pulls down the indicator handle 13. The indicator handle 13 drives the main shaft 11 to rotate in the opposite direction, and the main shaft 11 drives the magnetic control mechanism 4 to perform the tripping operation. The indicator handle 13 adopts an anti-pull-damage design, and its internal torque limiting structure is set. When the operating force exceeds the set value, the handle slips between the handle and the main shaft, preventing damage to the internal mechanism due to excessive operation. The manual tripping indicator 203 is used to indicate to the operator that the handle has a manual tripping function, and the tripping indicator 202 is used to observe the current status.

[0077] The entire device weighs only 30kg, and the two sides of the housing 2 are equipped with lifting handles 206, allowing two ordinary adults to easily lift it. For complex terrains such as mountainous areas and forests that are inaccessible by engineering vehicles, or for emergency repair sites after disasters where roads have been damaged, the lightweight design allows the device to be transported by manpower, greatly improving the flexibility of installation and repair. The lifting ring 103 on the incoming terminal 101 is also suitable for mechanical lifting, and the positioning holes 10311 on both sides of the stainless steel threaded sleeve 1031 are used for positioning during installation to prevent rotation and dislodgement during lifting, ensuring lifting safety.

[0078] In terms of application, this device can be flexibly configured according to the type of line. For single-phase two-wire lines, two devices connected to the live and neutral wires respectively can meet the protection requirements, eliminating the need for the wasteful use of three-phase equipment as in traditional solutions. For three-phase lines, three devices are used, connected to phases A, B, and C respectively. During installation, the phase spacing can be flexibly changed by adjusting the fixed positions of each device on the mounting hardware according to the pole structure and hardware dimensions, adapting to different installation conditions. The device can also replace traditional fuses, possessing the ability to interrupt short-circuit current and reclosing function. It can automatically restore power supply after transient faults, reducing the workload of manual line inspection and fuse replacement.

[0079] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A single-phase instantaneous tripping device, characterized in that, include: The enclosure (2) has a single dynamic sealing hole; the solid sealing pole (1) is fixedly connected to the enclosure (2); the magnetic control mechanism (4) is located inside the enclosure (2); the main shaft (11) passes through the single dynamic sealing hole on the enclosure (2), and one end of the main shaft (11) is connected to the magnetic control mechanism (4); the indicator handle (13) is located outside the enclosure (2) and is connected to the other end of the main shaft (11); the magnetic control mechanism (4) drives the main shaft (11) to rotate, thereby driving the indicator handle (13) to rotate to indicate the status of the device, and pulling the indicator handle (13) can drive the main shaft (11) to rotate, thereby driving the magnetic control mechanism (4) to perform the circuit breaker operation.

2. The single-phase instantaneous tripping device according to claim 1, characterized in that, An arc-extinguishing chamber is provided inside the solid-sealed pole (1). The device also includes an insulating pull rod (109). One end of the insulating pull rod (109) is connected to the arc-extinguishing chamber, and the other end passes through the housing (2) and is connected to the magnetic control mechanism (4).

3. The single-phase instantaneous tripping device according to claim 2, characterized in that, The solid-sealed pole (1) is provided with an inlet terminal (101) and an outlet terminal (102), and the inlet terminal (101) and the outlet terminal (102) are electrically connected to the arc-extinguishing chamber inside the solid-sealed pole (1).

4. The single-phase instantaneous tripping device according to claim 2, characterized in that, The insulating pull rod (109) is provided with a self-locking nut (6), and the insulating pull rod (109) is connected to the magnetic control mechanism (4) through the self-locking nut (6).

5. The single-phase instantaneous tripping device according to claim 1, characterized in that, The solid-sealed pole (1) is provided with an input-side energy harvesting capacitor (107) and an output-side energy harvesting capacitor (106). The housing (2) is provided with a power harvesting device (8). The input-side energy harvesting capacitor (107) and the output-side energy harvesting capacitor (106) are electrically connected to the power harvesting device (8).

6. The single-phase instantaneous tripping device according to claim 1, characterized in that, The solid-sealed pole (1) is equipped with an incoming voltage sensor (105), an outgoing voltage sensor (104) and a current sensor. The current sensor is equipped with a secondary terminal (108). The housing (2) is equipped with a voltage and current acquisition box (7). The incoming voltage sensor (105), the outgoing voltage sensor (104) and the secondary terminal (108) of the current sensor are electrically connected to the voltage and current acquisition box (7).

7. The single-phase instantaneous tripping device according to claim 1, characterized in that, A sealing ring (110) is provided at the connection between the solid sealing pole (1) and the housing (2).

8. A method for operating a single-phase instantaneous trip device, applied to the single-phase instantaneous trip device according to any one of claims 1 to 7, characterized in that, Includes the following steps: The magnetic control mechanism (4) drives the main shaft (11) to rotate, and the main shaft (11) drives the indicator handle (13) to rotate to the corresponding position to indicate whether the device is in the closed or open state. When manual opening is required, the indicator handle (13) is pulled, and the indicator handle (13) drives the main shaft (11) to rotate in the opposite direction. The main shaft (11) drives the magnetic control mechanism (4) to perform the opening operation.

9. The operating method according to claim 8, characterized in that, It also includes the following steps: The single-phase quick-break device is fixed to the mounting hardware through the mounting hole (210) of the housing; the incoming terminal (101) and outgoing terminal (102) of the single-phase quick-break device are respectively connected to the primary circuit.

10. The operating method according to claim 9, characterized in that, When applied to a single-phase two-wire circuit, the two single-phase quick-break devices are connected to the live wire and the neutral or ground wire respectively; when applied to a three-phase circuit, the three single-phase quick-break devices are connected to phase A, phase B, and phase C respectively, and the phase spacing between the three phases is adjusted by adjusting the fixed position of each single-phase quick-break device on the mounting hardware.

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