All-insulation outgoing line cylindrical three-phase integrated quick circuit breaker

Abstract

The invention relates to the technical field of vacuum circuit breakers, and discloses an all-insulation lead-out wire cylindrical three-phase integrated quick circuit breaker, which comprises a deep fusion solid-sealed polar pole, a rotatable cylindrical box body, a magnetic control mechanism, an all-insulation lead-out wire assembly, a feeder terminal and a base, and a vacuum arc-extinguishing chamber, a flexible connector, a high-precision current sensor, an insulating pull rod and a high-precision voltage sensor are arranged in the deep fusion solid-sealed polar pole. The quick circuit breaker is suitable for three-phase and single-phase systems. In a single-phase operating system, the operating mode is particularly simple and convenient, and a user only needs to rotate the opening and closing valve switch to quickly replace a fault pole with a standby pole. The design ensures that the system can quickly recover normal operation when a fault occurs, so that the reliability and the stability of the system are greatly improved. Besides, the configuration of the standby pole provides a solid guarantee for continuous operation of the system, so that long-time shutdown caused by faults is effectively avoided, and the influence on production and life is reduced to the greatest extent.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breakers, and particularly to a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. Background Art

[0002] In modern power grid systems, with the continuous improvement of automation and intelligence levels, the performance requirements for circuit breakers are also getting higher and higher. Traditional circuit breakers are difficult to meet the needs of modern power grids in terms of structure and function. As the core component of a new type of distribution system, the 10kV vacuum circuit breaker has gradually become the first choice to meet the needs of the new type of distribution system due to its advantages such as compact structure, powerful functions, and easy maintenance.

[0003] Currently, the development trends of 10kV vacuum circuit breakers include miniaturization of the structural form, low power consumption, high measurement accuracy, and the use of electronic sensors with a wide protection range. These technological advancements help support hierarchical protection of the distribution network, achieve state visualization, and rapid self-healing of faults.

[0004] However, there are some problems and challenges in the existing technologies. For example, the spring operating mechanism has a complex structure, a cumbersome manufacturing process, and problems such as long closing time, long opening time, many transmission components, and high mechanical failure rate. The electromagnetic operating mechanism faces problems such as large closing current, high power consumption, the need for a high-power DC operating power supply, and low operating speed. Although the permanent magnet operating mechanism has a relatively large operating power, the control circuit has a high failure rate, and demagnetization may occur in special environments such as high temperature and strong magnetic field.

[0005] In the existing magnetically controlled circuit breakers, the pole column casting method uses silicone rubber coating or epoxy resin casting, resulting in electrical clearances and making it difficult to control partial discharge. In addition, the problems of uneven electromagnetic field distribution and electromagnetic field distortion caused by the parallel arrangement of three-phase support columns also need to be solved urgently.

[0006] The exposed electrical contacts of the circuit breaker's incoming and outgoing terminals and the feeder terminal connection cables are vulnerable to environmental factors, leading to a decline in insulation performance and a short-circuit risk. The cable may generate induced current in the electromagnetic field, interfering with signal transmission, and being exposed to the natural environment for a long time will be affected by factors such as ultraviolet rays, temperature changes, and humidity, affecting the conductive performance.

[0007] In terms of installation, the existing circuit breakers must be placed parallel to successfully connect the cables, which limits the installation angle and increases the installation difficulty. Once an outdoor single-phase circuit breaker fails, the handling method is single, usually only replacement, which not only increases the cost but also may affect the stability and reliability of the power system.

[0008] Therefore, based on the above technical problems, it is necessary for those skilled in the art to develop a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. Summary of the Invention

[0009] The object of the present invention is to provide a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker to solve the problems presented in the above-mentioned background technology.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A technical solution for a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker, comprising:

[0012] Deeply integrating a solid-sealed pole column, a rotatable cylindrical box body, a magnetic control mechanism, a fully insulated lead-out wire assembly, a feeder terminal, and a base. The solid-sealed pole column is internally provided with a vacuum arc extinguishing chamber, a flexible connection, a high-precision current sensor, an insulating pull rod, and a high-precision voltage sensor;

[0013] The rotatable cylindrical box body is arranged outside the solid-sealed pole column, and the rotatable cylindrical box body is provided with opening and closing indications and opening and closing valve switches;

[0014] The magnetic control mechanism includes a static iron core, a moving iron core, opening and closing magnetic control coils, a vertically moving connecting rod, and a tripping spring. The opening and closing magnetic control coils drive the cooperation of the moving iron core and the static iron core to achieve opening and closing actions;

[0015] The fully insulated lead-out wire assembly includes a fully insulated terminal and a fully insulated lead-out wire, and the fully insulated lead-out wire is connected to the feeder terminal;

[0016] The base is provided with a rotating handle, an axial bevel gear, a radial bevel gear, and a ball bearing. The rotating handle drives the rotatable cylindrical box body to rotate through the axial bevel gear and the radial bevel gear.

[0017] As a preferred technical solution, the solid-sealed pole column adopts a three-phase integrated structure, and the three-phase vacuum arc extinguishing chambers are distributed at a 120° phase.

[0018] As a preferred technical solution, the tripping spring of the magnetic control mechanism is coaxially arranged with the vertically moving connecting rod, and the vertically moving connecting rod is connected to the moving contact of the vacuum arc extinguishing chamber through an insulating pull rod.

[0019] As a preferred technical solution, the opening and closing magnetic control coils are of a double-coil structure, respectively controlling the closing and opening actions, and the current signal is monitored in real time through a high-precision current sensor.

[0020] As a preferred technical solution, the rotatable cylindrical box body is connected to the base through a ball bearing, and the rotating handle drives the axial bevel gear and the radial bevel gear to achieve 360° free rotation of the rotatable cylindrical box body.

[0021] As a preferred technical solution, the full-insulation terminal of the full-insulation lead-out wire assembly is coated with a silicone rubber composite insulation material and connected to the feeder terminal through a fully-sealed plug-in structure.

[0022] As a preferred technical solution, the closing and opening indication is a mechanical pointer structure, which is linked with the closing and opening valve switch to display the closing and opening states of the circuit breaker in real time.

[0023] As a preferred technical solution, an electromagnetic shielding layer is provided inside the base to eliminate electromagnetic interference caused by uneven distribution of three-phase electromagnetic fields.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] (1) The present invention relates to a fully-insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. In the mechanism design of this fast circuit breaker, a semi-hard magnetic memory alloy material is selected. This material has a unique magnetic memory effect and can maintain its magnetic state under specific conditions. Its material properties are stable and the structure is reliable, ensuring that the mechanical operation life of the switch exceeds 30,000 times. In addition, the circuit breaker is relatively light in weight, not exceeding 65 kg, meeting the high-quality development direction of low-carbon emission reduction. By adopting the DC voltage excitation method, the overall driving power is significantly reduced, the number of risk components in the electrical control circuit is reduced, and the failure probability drops significantly. This design also helps to improve the closing and opening speeds of the circuit breaker, shortening the closing time to within 30 ms and the opening time to within 10 ms, thus supporting five-level differential in-situ feeder automation protection and realizing fine adjustment of the line protection range.

[0026] (2) The present invention relates to a fully-insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. It adopts a three-phase integrated cylindrical design, and the spacing and phase sector distribution between the three-phase solid-sealed pole columns are uniform and symmetrical, without the need to distinguish between the edge phase and the center phase. The uniform electromagnetic field distribution effectively reduces the influence of electromagnetic field distortion on the accuracy of each voltage and current sensor, and at the same time realizes the minimization design of the overall circuit breaker.

[0027] (3) The present invention relates to a fully-insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. Through high-performance outdoor epoxy resin, key components such as high-precision voltage and current sensors, vacuum arc extinguishing chambers, flexible connections, and insulating tie rods are integrally designed and solid-sealed. This design effectively solves problems such as concentrated electromagnetic fields, discharges, magnetic field interference, heating, and difficult pouring processes. The partial discharge amount of the whole machine is less than 10 pC, greatly reducing the breakdown risk. At the same time, the number of detachable parts is small and the integration degree is high, which is beneficial to the assembly and debugging of subsequent robot automated production lines and ensures the long-term stable operation of the product.

[0028] (4) The present invention is a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. The use of fully insulated lead-out wires has multiple advantages. Firstly, it has excellent weather resistance and can operate stably under various harsh climate conditions, such as high temperature, low temperature, humidity, pollution, and ultraviolet radiation. Its insulation performance will not be reduced due to external factors. Secondly, it has excellent anti-aging performance, effectively extending the service life of the lead-out wire, ensuring that the circuit breaker always maintains reliable electrical insulation performance during long-term use, thus greatly improving the use safety.

[0029] (5) The present invention is a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. The circuit breaker and the feeder terminal are integrated, effectively reducing the fault points caused by the connection lines. At the same time, this design has a self-diagnosis function, which can detect potential abnormalities in advance and perform maintenance in a timely manner. In addition, this integrated solution not only saves installation space, improves space utilization, but also reduces the overall cost of equipment procurement, installation, and the entire life cycle.

[0030] (6) The present invention is a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. The controllable rotating mechanism provides great convenience for the installation and use of the circuit breaker, especially in an environment with limited space, and the role of this mechanism is particularly significant. By rotating the circuit breaker, the line connection and maintenance operations become more convenient, and at the same time, the overall layout flexibility of the electrical system is improved.

[0031] (7) The present invention is a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker. The fast circuit breaker is applicable to three-phase and single-phase systems. In a single-phase application system, its operation method is particularly simple. The user only needs to rotate the opening and closing valve switch. After opening, remove the corresponding faulty pole column and reinstall the spare pole column, and the faulty pole column can be quickly replaced with the spare pole column. This design ensures that the system can quickly return to normal operation when a fault occurs, thus greatly improving the reliability and stability of the system. In addition, the configuration of the spare pole column provides a solid guarantee for the continuous operation of the system, effectively avoiding long-term downtime caused by faults and minimizing the impact on production and life. Description of the Drawings

[0032] Figure 1 Schematic diagram of the rotating structure of a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker;

[0033] Figure 2 Schematic diagram of the operation and indication structure of a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker;

[0034] Figure 3 Schematic diagram of the electromagnetic field distribution of a traditional three-phase pillar circuit breaker;

[0035] Figure 4 Schematic diagram of the electromagnetic field with a 120° phase distribution according to the present invention;

[0036] Figure 5 Schematic diagram of a sectional view of one phase of a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker;

[0037] Figure 6 Schematic diagram of a sectional view of the magnetic control mechanism of a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker;

[0038] Figure 7 Schematic diagram of the internal structure of the base of a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker.

[0039] In the attached drawings: 1, deeply integrated solid-sealed pole column; 11, vacuum arc extinguishing chamber; 12, flexible connection; 13, high-precision current sensor; 14, insulating pull rod; 15, high-precision voltage sensor; 2, rotatable cylindrical box body; 21, opening and closing indication; 22, opening and closing valve switch; 3, magnetic control mechanism; 31, static iron core; 32, moving iron core; 33, opening and closing magnetic control coil; 34, vertical moving connecting rod; 35, opening spring; 4, fully insulated lead-out wire assembly; 41, fully insulated terminal; 42, fully insulated lead-out wire; 5, feeder terminal; 6, base; 61, rotating handle; 62, axial bevel gear; 63, radial bevel gear; 64, ball bearing. Detailed implementation manners

[0040] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the attached drawings and specific embodiments. For those skilled in the art, the present invention can be implemented without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

[0041] As Figures 1-7As shown in the figure, the present invention provides a technical solution for a fully insulated lead-out wire cylindrical three-phase integrated fast circuit breaker: The present invention relates to a circuit breaker, which includes a deeply integrated solid-sealed pole column 1, a rotatable cylindrical box body 2, a magnetic control mechanism 3, a fully insulated lead-out wire assembly 4, a feeder terminal 5, and a base 6. Inside the deeply integrated solid-sealed pole column 1, there are a vacuum interrupter 11, a flexible connection 12, a high-precision current sensor 13, an insulating pull rod 14, and a high-precision voltage sensor 15. Specifically, the high-precision voltage sensor 15 uses ceramic capacitor voltage division. The ceramic capacitor has the advantages of low loss, high voltage resistance, strong anti-interference ability, small volume, and small ground leakage current. The high-precision current sensor 13 uses the LPCT method and has the advantages of high output sensitivity, not easy to saturate, and stable performance. The vacuum interrupter 11 is responsible for cutting off the current in the circuit, and the flexible connection 12 is used to connect different components. The high-precision current sensor 13 and the high-precision voltage sensor 15 are respectively used to monitor the current and voltage, and the insulating pull rod 14 ensures electrical isolation. The rotatable cylindrical box body 2 is arranged outside the deeply integrated solid-sealed pole column 1. Specifically, the shell of the rotatable cylindrical box body 2 is integrally composed of 304 or 314 or 314L stainless steel material, or cast aluminum material, or high-strength non-metallic material. It is provided with a closing and opening indication 21 and a closing and opening valve switch 22, which is convenient for the operator to understand and control the state of the circuit breaker. The magnetic control mechanism 3 includes a static iron core 31, a moving iron core 32, a closing and opening magnetic control coil 33, a vertical moving connecting rod 34, and a tripping spring 35. The closing and opening magnetic control coil 33 drives the moving iron core 32 to cooperate with the static iron core 31 to realize the closing and opening actions. The fully insulated lead-out wire assembly 4 includes a fully insulated terminal 41 and a fully insulated lead-out wire 42. The fully insulated lead-out wire 42 is connected to the feeder terminal 5, ensuring the safety of current transmission. The base 6 is provided with a rotating handle 61, an axial bevel gear 62, a radial bevel gear 63, and a ball bearing 64. The rotating handle 61 drives the rotatable cylindrical box body 2 to rotate through the axial bevel gear 62 and the radial bevel gear 63, so as to realize the rapid installation and maintenance of the circuit breaker.

[0042] The deeply integrated solid-sealed pole column 1 adopts a three-phase integrated structure, and the three-phase vacuum interrupters 11 are distributed at a 120° phase angle to achieve a uniform electromagnetic field distribution. This design not only improves the arc extinguishing efficiency but also reduces electromagnetic interference, thereby enhancing the performance of the entire circuit breaker.

[0043] The tripping spring 35 of the magnetic control mechanism 3 is coaxially arranged with the vertical moving connecting rod 34. The vertical moving connecting rod 34 is connected to the moving contact of the vacuum interrupter 11 through the insulating pull rod 14 to ensure the accuracy and reliability of the action. This structural design enables the circuit breaker to be more stable and reliable during closing and opening.

[0044] When a positive current is applied to the magnetic control mechanism 3, a magnetic force is generated between the static iron core 31 and the moving iron core 32, causing the fast circuit breaker to close quickly and, under the action of the magnetic memory effect, maintaining the closed state; when a reverse current is applied, the closing and opening magnetic control coil 33 demagnetizes quickly. When the magnetic force is less than the repulsive force of the opening spring 35, the vertically moving connecting rod 34 will drive the moving iron core 32, causing the circuit breaker to open quickly. When the magnetic force disappears, the fast circuit breaker maintains the open state under the repulsive force of the opening spring 35. At the same time, the magnetic control mechanism 3 can also be linked to the vacuum interrupter 11 of the circuit breaker to manually open the circuit through the closing and opening valve switch 22.

[0045] Specifically, the moving iron core 32 and the precision iron core 31 are processed from semi-hard magnetic memory alloy materials. The semi-hard magnetic memory alloy materials do not refer to a specific alloy material, but a class of alloy materials with semi-hard magnetic properties and memory characteristics, specifically iron-nickel-based alloys: mainly composed of iron and nickel. By adjusting the content of each element in the alloy, different magnetic properties and memory properties can be obtained. This type of alloy has a high magnetic permeability and a low coercive force, and at the same time has a certain shape memory effect.

[0046] The closing and opening magnetic control coil 33 has a double-coil structure, which controls the closing and opening actions respectively, and the current signal is monitored in real time through the high-precision current sensor 13 to achieve precise control. This design enables the circuit breaker to respond quickly according to the current change, improving the accuracy and safety of the operation.

[0047] The rotatable cylindrical box body 2 is connected to the base 6 through the ball bearing 64. The rotating handle 61 drives the axial bevel gear 62 and the radial bevel gear 63 to realize the 360° free rotation of the rotatable cylindrical box body 2, thus facilitating the installation and maintenance of the circuit breaker. This design greatly simplifies the installation process of the circuit breaker and reduces the maintenance cost.

[0048] The full-insulation terminal 41 of the full-insulation lead-out line assembly 4 is coated with a silicone rubber composite insulation material and is connected to the feeder terminal 5 through a fully sealed plug-in structure to ensure good insulation performance and weather resistance. This design enables the circuit breaker to maintain stable performance in various environments and improves its application range.

[0049] The closing and opening indicator 21 has a mechanical pointer structure, which is linked to the closing and opening valve switch and displays the closing and opening state of the circuit breaker in real time to provide intuitive operation feedback. This design enables the operator to clearly understand the working state of the circuit breaker and improves the convenience and safety of the operation.

[0050] The base 6 is internally provided with an electromagnetic shielding layer to eliminate the electromagnetic interference caused by the uneven distribution of the three-phase electromagnetic field, so as to ensure the stable operation of the electrical system. This design effectively reduces the influence of electromagnetic interference on the electrical system and ensures the stability and reliability of the entire system.

[0051] The feeder terminal 5 collects analog quantities such as voltage and current in real time, as well as the states of switches and fault indicators, realizes remote and local control, has communication functions and supports multiple protocols. It can detect and locate faults, quickly cut off the faulty line when the line current exceeds the rated value, and can also achieve ground fault protection in an ungrounded neutral system, improving the automation level of the distribution network, shortening the fault finding time, and ensuring the safe operation of equipment and the stable operation of the power grid.

[0052] Through the above technical solutions, the fully insulated outgoing line cylindrical three-phase integrated fast circuit breaker of the present invention has significant innovations and advantages in both structural design and function realization, can meet the high requirements of modern power grid systems for the performance of circuit breakers, and at the same time has the characteristics of simple operation, convenient maintenance, high reliability, and strong weather resistance.

[0053] The working principle and usage process of the present invention: First, the operator drives the axial bevel gear and the radial bevel gear through the rotating handle to realize the 360° free rotation of the rotatable cylindrical box body, and adjusts the circuit breaker to a suitable installation position. Then, the operator can control the opening and closing actions of the circuit breaker through the opening and closing valve switches. The opening and closing magneto-controlled coils drive the moving iron core to cooperate with the static iron core, and drive the moving contact of the vacuum arc extinguishing chamber to complete the opening and closing operations through the vertical moving connecting rod and the insulating pull rod. At the same time, the high-precision current sensor and the high-precision voltage sensor monitor the current and voltage signals in real time to ensure the precise control and safe operation of the circuit breaker. During the operation of the circuit breaker, the opening and closing indication provides intuitive operation feedback and real-time displays the opening and closing states of the circuit breaker. If a fault occurs in the circuit breaker, its self-diagnosis function can timely detect potential abnormalities and remind the operator to perform maintenance. In addition, the configuration of the spare pole column enables users to quickly replace the faulty pole column with the spare pole column in a single-phase application system by simply rotating the opening and closing valve switch, ensuring the continuous and stable operation of the system.

[0054] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

[0055] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0056] In the present invention, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to only the specific embodiments. Obviously, according to the above description, many modifications and variations can be made. The present specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and its modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker, characterized in that: include: A deep fusion sealed pole (1), a rotatable cylindrical box (2), a magnetron mechanism (3), a fully insulated lead-out wire assembly (4), a feeder terminal (5) and a base (6), wherein the deep fusion sealed pole (1) is provided with a vacuum arc extinguishing chamber (11), a flexible connection (12), a high-precision current sensor (13), an insulating pull rod (14) and a high-precision voltage sensor (15); The rotatable cylindrical box (2) is arranged outside the deep fusion sealed pole (1), and the rotatable cylindrical box (2) is provided with an opening and closing indicator (21) and an opening and closing valve switch (22); The magnetic control mechanism (3) comprises a static iron core (31), a moving iron core (32), a switch-on and switch-off magnetic control coil (33), a vertically movable connecting rod (34) and a switch-off spring (35); the switch-on and switch-off magnetic control coil (33) drives the moving iron core (32) to cooperate with the static iron core (31) to realize the switch-on and switch-off actions; The fully insulated lead wire assembly (4) comprises a fully insulated terminal (41) and a fully insulated lead wire (42), and the fully insulated lead wire (42) is connected to the feeder terminal (5); The base (6) is provided with a rotating handle (61), an axial bevel gear (62), a radial bevel gear (63) and a ball bearing (64); the rotating handle (61) drives the rotatable cylindrical housing (2) to rotate via the axial bevel gear (62) and the radial bevel gear (63).

2. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 1, characterized in that: The deep fusion sealed pole (1) adopts a three-phase integrated structure, and the three-phase vacuum interrupter (11) is distributed in phase at 120°.

3. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 1, characterized in that: The opening spring (35) of the magnetic control mechanism (3) is coaxially arranged with the vertical movable connecting rod (34), and the vertical movable connecting rod (34) is connected to the moving contact of the vacuum interrupter (11) via an insulating pull rod (14).

4. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 3, characterized in that: The closing and opening magnetic control coil (33) is a double-coil structure, which controls the closing and opening actions respectively, and monitors the current signal in real time through a high-precision current sensor (13).

5. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 1, characterized in that: The rotatable cylindrical housing (2) is connected to the base (6) via a ball bearing (64), and the rotating handle (61) drives the axial bevel gear (62) and the radial bevel gear (63) to achieve 360° free rotation of the rotatable cylindrical housing (2).

6. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 1, characterized in that: The fully insulated terminal (41) of the fully insulated lead-out wire assembly (4) is coated with a silicone rubber composite insulating material and is connected to the feeder terminal (5) via a fully sealed plug-in structure.

7. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 1, characterized in that: The opening and closing indicator (21) is a mechanical pointer structure, which is linked with the opening and closing valve switch (22) to display the opening and closing status of the circuit breaker in real time.

8. A fully insulated lead-out cylindrical three-phase integrated fast circuit breaker according to claim 1, characterized in that: An electromagnetic shielding layer is provided inside the base (6) to eliminate electromagnetic interference caused by uneven distribution of the three-phase electromagnetic field.

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