Intelligent primary and secondary fusion complete column-mounted circuit breaker

Abstract

The utility model discloses an intelligent primary and secondary fusion complete pole-mounted circuit breaker, which relates to the technical field of power grid equipment and comprises a base and a plurality of poles, each pole is provided with a first conductive pole and a third conductive pole, and the first conductive pole and the third conductive pole are provided with contacts in vacuum tubes. An insulating column is fixedly connected to the third conductive column, the operating mechanism is arranged in the base, the operating mechanism serves as a power source for driving the insulating column to move, and the operating mechanism comprises an electromagnetic coil, a driving rod, a linkage mechanism and a locking mechanism; the electromagnetic coil is fixed in the base, the driving rod is supported in the base in a sliding mode, and a movable iron core matched with the electromagnetic coil is arranged on the driving rod. The insulating column in each pole is in transmission connection with the driving rod through a linkage mechanism; the locking mechanism comprises a first locking mechanism and a second locking mechanism, and the pole-mounted circuit breaker can effectively reduce the energy consumption of the pole-mounted circuit breaker during working through optimizing the operating mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of power grid equipment, in particular to an intelligent primary and secondary integrated pole-mounted circuit breaker. Background Art

[0002] As an intelligent device, the intelligent primary and secondary integrated pole-mounted circuit breaker has the characteristics of integrated primary and secondary circuit equipment and functions. It is mainly used to realize the segmentation, control and protection of power lines, and plays an important role in the comprehensive monitoring and management of power systems. The main structure of the intelligent primary and secondary integrated pole-mounted circuit breaker includes a pole and a base. Several poles (usually three) are fixed on the base. The pole is equipped with a vacuum arc chamber. The vacuum arc chamber is equipped with a moving contact and a static contact. The base is provided with an operating mechanism for realizing the opening and closing excitation. When the pole-mounted circuit breaker is opened under the action of the operating mechanism, the arc generated can be quickly extinguished due to the higher vacuum degree in the vacuum arc chamber and the magnetic field in the contact gap, so as to achieve the purpose of breaking. Intelligent primary and secondary integrated pole-mounted circuit breakers usually also include voltage transformers and current transformers, which are used to collect voltage signals and current signals on the line respectively. They also usually include transformer coils, capacitors, etc. (usually installed in feeder terminal units (FTUs)) to draw power from the line as the power supply for the operating mechanism, related control modules, and signal acquisition modules.

[0003] In order to realize the opening or closing operation, the traditional pole-mounted circuit breaker adopts spring energy storage, specifically, the spring on the spring operating mechanism is stretched manually or electrically. When the opening and closing action is triggered by an electromagnet, the moving contact is quickly driven by the spring. In addition, the technical solution provided in the patent document with patent application number CN201510439913.8 provides a technical solution for realizing the opening and closing operation of the circuit breaker based on the opening electromagnetic coil and the closing electromagnetic coil. This solution can effectively simplify the number of transmission parts by eliminating the mechanical operating mechanism.

[0004] In order to make the pole-mounted circuit breaker better adapt to the characteristics of its application environment, it is necessary to further optimize the structure of the pole-mounted circuit breaker to reduce its energy consumption during operation. Utility Model Content

[0005] In view of the above-mentioned problem of further optimizing the structure of the pole-mounted circuit breaker, the utility model provides an intelligent primary-secondary integrated pole-mounted circuit breaker. The pole-mounted circuit breaker can effectively reduce its energy consumption during operation by optimizing its operating mechanism for realizing opening and closing drive.

[0006] In view of the above problems, the utility model provides an intelligent primary and secondary integrated pole-mounted circuit breaker to solve the problems through the following technical points: an intelligent primary and secondary integrated pole-mounted circuit breaker, comprising a base and a plurality of poles mounted on the base, each pole is provided with a first conductive column and a third conductive column, the first conductive column and the third conductive column are both provided with contacts located in a vacuum tube, the third conductive column is fixedly connected with an insulating column for driving the third conductive column to move, and also includes an operating mechanism arranged in the base, the operating mechanism serves as a power source for driving the insulating column to move, and the operating mechanism includes an electromagnetic coil, a driving rod, a linkage mechanism and a locking mechanism;

[0007] The electromagnetic coil is fixed in the base, the driving rod is slidably supported in the base, and a moving iron core matching the electromagnetic coil is arranged on the driving rod;

[0008] The insulating posts in each pole are connected to the driving rod through a linkage mechanism;

[0009] The locking mechanism includes a first locking mechanism and a second locking mechanism. When the electromagnetic coil drives the driving rod to move to the first position through the moving iron core, the contacts in each pole are in a closed state, the first locking mechanism locks the driving rod in the first position, and the second locking mechanism is in a state of releasing the driving rod. When the electromagnetic coil drives the driving rod to move to the second position through the moving iron core, the contacts in each pole are in an open state, the second locking mechanism locks the driving rod in the second position, and the first locking mechanism is in a state of releasing the driving rod.

[0010] When the present solution is in use, the third conductive column is used to be electrically connected to the second conductive column, and a first terminal block and a second terminal block, both of which serve as terminal blocks, are respectively provided on the first conductive column and the second conductive column. After the first terminal block and the second terminal block are connected to the power grid, when the contacts of the first conductive column and the third conductive column are in contact with each other, the column-mounted circuit breaker is in a closed state, and when the contacts of the first conductive column and the third conductive column are separated from each other, the column-mounted circuit breaker is in an open state. In the operating mechanism, by controlling the driving current provided to the electromagnetic coil, an electromagnetic force of a specific direction and magnitude is provided to the moving iron core, thereby forcing the driving rod to move synchronously with the moving iron core. During the movement of the driving rod, the linkage mechanism acts on the insulating column, thereby using the insulating column to change the position of the second conductive column on its axis, thereby achieving the purpose of adjusting the contact state of the contact. The locking mechanism is used to constrain the position of the driving rod so that the contact can be maintained in a contact state and a separated state. The vacuum tube provides a working environment for the contact to accelerate the arc extinction, thereby realizing rapid circuit breaking.

[0011] The structural features of the pole-mounted circuit breaker provided above include the use of the same electromagnetic coil, under the action of the driving rod, the linkage mechanism and the locking mechanism, so that the third conductive column among the plurality of poles can be synchronously actuated, and the closing action and opening action of each pole can be synchronously completed with a simple operating mechanism structure, so that each pole can maintain the same closing state and opening state, which is suitable for synchronous control and maintenance of the conduction state of a multi-phase line.

[0012] The structural features of the pole-mounted circuit breaker provided above include the use of an electromagnetic coil as a driving source and a locking mechanism as a line conduction state maintaining mechanism. During operation, the electromagnetic coil is powered when opening and closing switching is required. When the required opening and closing states are reached, the locking mechanism can be used to maintain the current line conduction state. The electromagnetic coil can remain in a de-energized state during the conduction state. When this solution is used in a commonly used 6 to 20KV distribution network system, its normal operation does not require excessive energy consumption. The use of an energy-taking transformer can meet the electromagnetic coil's demand for electrical energy. The pole-mounted circuit breaker can effectively reduce its energy consumption and convenience of electrical energy supply during operation by optimizing its operating mechanism for realizing opening and closing drive.

[0013] The operating mechanism of the pole-mounted circuit breaker provided above also has the characteristics of simple structure. In conjunction with the control module for controlling the electromagnetic coil, it can be well adapted to the disconnection trigger signal from the voltage transformer on the pole-mounted circuit breaker, the disconnection trigger signal from the current transformer on the pole-mounted circuit breaker, the disconnection trigger signal from the feeder terminal equipment, etc., and is suitable for and can effectively serve the smart grid.

[0014] As a person skilled in the art, during the movement of the driving rod, the third conductive column is driven to move through the linkage mechanism and the insulating column, thereby changing the contact state of the contact, and the first position and the second position are the positions that the driving rod can reach when it moves under the action of the electromagnetic coil. The linkage mechanism includes but is not limited to the following linkage mechanism using a connecting rod, such as a linkage mechanism including a gear and a toothed plate, for example, a toothed plate structure is provided on the driving rod and the insulating column, and the toothed plate structure on the driving rod and the insulating column establishes a transmission relationship through a gear installed on the base, and the linkage mechanism can also adopt a linkage mechanism including a driving plate with a slide groove, for example, the driving plate is fixed on the driving rod, and in the axial direction of the driving rod, the slide grooves at different positions have different distances from the axis of the driving rod, and the lower end of the insulating column is engaged in the slide groove through a pulley / slide rod. When the driving rod moves, the operation of the slide groove acts on the pulley / slide rod, thereby driving the third conductive column to move up and down. The locking mechanism includes but is not limited to the following structure using a first permanent magnet and a second permanent magnet, such as an annular groove coaxial with the driving rod is set on the driving rod, the locking mechanism includes a locking ring sleeved on the outside of the driving rod, the locking ring is supported by a spring with a steel ball, as the driving rod moves, when the annular groove moves to the same position as the steel ball, the steel ball is embedded in the annular groove under the support of the spring, so that the position of the driving rod is locked after the electromagnetic coil is powered off, when the position of the driving rod needs to be adjusted, the electromagnetic force provided by the electromagnetic coil to the driving rod forces the spring to slide out of the annular groove under the action of the steel ball, so that the driving rod can move to the next required position, the locking ring, the spring and the steel ball can also be replaced by an elastic claw connected to the base at one end, that is, the driving rod is locked when the teeth of the elastic claw are embedded in the annular groove.

[0015] As a further technical solution for the intelligent primary and secondary integrated pole-mounted circuit breaker:

[0016] A connecting column is provided at the bottom of each insulating column, and the linkage mechanism comprises a connecting rod, the upper end of the connecting rod is hingedly connected to the connecting column, and the lower end of the connecting rod is hingedly connected to the driving rod;

[0017] The driving rod is slidably supported in the base through a supporting frame fixed on the base.

[0018] The above provides a specific linkage mechanism implementation method and a driving rod support form. Specifically, when the driving rod moves linearly along its axis under the constraint of the base, the connecting rod flips to drive the connecting column to move up and down, thereby achieving the purpose of linking the third conductive column with the driving rod. The support frame is used to maintain the movement accuracy of the driving rod and the matching accuracy of the moving iron core and the electromagnetic coil. The preferred implementation method is that the base forms a closed shell structure, and the support frame is set to have at least two. Compared with other implementation methods, the above linkage mechanism has the characteristics of simple structure, low failure rate and small size. By supporting the driving rod with the support frame, the base can be set as a closed shell structure on the premise of a small base size to ensure the performance reliability of this solution.

[0019] The connecting rod is hingedly connected to the bottom of the connecting column through a hinge shaft, and a limiting groove is arranged on the base shell of the base, and the limiting groove is a vertically arranged strip groove, and the end of the hinge shaft is slidably matched in the limiting groove;

[0020] The driving rod or the supporting frame is provided with a wear-resistant ring, and the surface of the wear-resistant ring serves as the contact surface between the driving rod and the supporting frame.

[0021] In the above scheme, the base provides support for the connecting column by the side contact between the hinge shaft and the limit groove. Compared with the side of the insulating column directly pressed on the top plate of the base, it can not only reduce the requirements on the electromagnetic force of the electromagnetic coil, but also reduce the wear rate on the corresponding friction pair. Preferably, a smooth wear-resistant layer is provided on the contact surface where each of the hinge shaft and the strip groove contacts the other, and the wear-resistant ring has the same function as the wear-resistant layer. It is used to reduce the wear rate on the corresponding friction pair during the movement of the drive rod relative to the support frame.

[0022] The first locking mechanism and the second locking mechanism both include a first permanent magnet, a flexible pad and a second permanent magnet, wherein the second permanent magnet is fixed to a base shell of the base, and the flexible pad is fixed to the first permanent magnet or the second permanent magnet;

[0023] The states of locking the driving rod by the first locking mechanism and the second locking mechanism are both: the first permanent magnet and the second permanent magnet are in an attracted state, and the flexible pad is clamped between the first permanent magnet and the second permanent magnet and undergoes elastic compression deformation;

[0024] The states of the first locking mechanism and the second locking mechanism releasing the driving rod are both: relative to the attraction state, the first permanent magnet and the second permanent magnet are in a state of being away from each other.

[0025] The above scheme provides a specific implementation form of the first locking mechanism and the second locking mechanism. When the first permanent magnet and the second permanent magnet are in a relatively close position, the larger magnetic force between the first permanent magnet and the second permanent magnet is used to maintain the position of the driving rod in the base, thereby maintaining the relative position of the third conductive column and the first conductive column. When the first permanent magnet and the second permanent magnet are forced to have a larger position under the action of the electromagnetic coil, there is a smaller magnetic force between the first permanent magnet and the second permanent magnet. Therefore, in the process of changing the position of the driving rod, when the first locking mechanism is in a state of locking the driving rod, the second locking mechanism is in a state of releasing the driving rod. When the second contraction mechanism is in a state of locking the driving rod, the first locking mechanism is in a state of releasing the driving rod. The flexible pad serves as an elastic cushion layer between the first permanent magnet and the second permanent magnet on each locking mechanism, and is used to avoid direct collision between the first permanent magnet and the second permanent magnet during the process of approaching each other, thereby achieving the purpose of protecting the first permanent magnet and the second permanent magnet.

[0026] The flexible pad is fixed on the second permanent magnet, and the flexible pad comprises a rubber layer, and a cloth fabric layer is fixed on a side of the rubber layer close to the first permanent magnet.

[0027] In the above scheme, the rubber layer serves as the elastic layer of the flexible pad, and the cloth fabric layer serves as the contact layer between the flexible pad and the first permanent magnet, so as to prevent the first permanent magnet from adhering to the flexible pad during long-term compression of the flexible pad with the first permanent magnet.

[0028] The vacuum tube comprises a vacuum tube body and a bellows, the vacuum tube body and the bellows form a vacuum chamber of the vacuum tube, and the contact is located in the vacuum chamber;

[0029] The vacuum tube body is located on the upper side of the bellows, the first conductive column is fixed to the end plate on the upper side of the vacuum tube body, a cylindrical boss is provided on the end plate on the lower side of the vacuum tube body, and the upper end of the bellows is sleeved on the outer side of the boss and is sealed and connected to the boss;

[0030] An annular insulating ring is sleeved on the third conductive column. The insulating ring is a ceramic ring. The insulating ring is fixedly connected and sealed to the third conductive column. The lower end of the bellows is sleeved on the outer side of the insulating ring and is sealed to the insulating ring.

[0031] The above scheme provides a specific implementation form of the vacuum tube. Specifically, the first conductive column is fixedly connected to the upper end of the vacuum tube body, and the third conductive column is movably connected to the vacuum tube body through a bellows. The bellows is located on the lower outer side of the vacuum tube body. The boss and the insulating ring provided above serve as a connecting structure and a heat-insulating structure. With this structure, under the heat of the arc generated during the contact breaking process, the bellows located outside the vacuum tube body not only has a good heat dissipation capacity, but also has a long distance from the arc. Under the action of the heat-insulating structure, the thermal resistance between the bellows and the third conductive column can be effectively increased, and the influence of the heat generated by the arc on the bellows can be reduced, thereby achieving the purpose of ensuring the life of the bellows.

[0032] The upper end of the bellows is connected to the boss through a first bayonet assembly, the first bayonet assembly includes a slot and a convex, one of the slot and the convex of the first bayonet assembly is arranged on the outer side of the convex, and the other is arranged on the inner side of the bellows, and the slot and the convex are engaged with each other;

[0033] The lower end of the bellows is connected to the insulating ring through a second bayonet assembly, and the second bayonet assembly includes a slot and a protrusion. One of the slot and the protrusion of the second bayonet assembly is arranged on the outer side of the insulating ring, and the other is arranged on the inner side of the bellows, and the slot and the protrusion are engaged with each other.

[0034] In the above scheme, the thrust and tension between the bellows and the boss, and between the bellows and the insulating ring are transmitted through the first bayonet assembly and the second bayonet assembly, thereby ensuring the connection reliability of the bellows and the sealing of the vacuum chamber.

[0035] The insulating column comprises a first insulating column fixedly connected to the lower end of the third conductive column and coaxially, and the insulating column also comprises a second insulating column located at the lower end of the first insulating column and plugged into the first insulating column, and the linkage mechanism is connected to the insulating column through the second insulating column;

[0036] It also includes a coil spring with an upper end fixedly connected to the first insulating column and a lower end fixedly connected to the second insulating column. When the drive rod is in the first position, the coil spring is in a compressed state, and when the drive rod is in the second position, the coil spring is in a stretched state.

[0037] The above scheme provides a split structure scheme in which the insulating column includes a first insulating column and a second insulating column. The first insulating column and the second insulating column have a plug-in relationship to maintain the coaxiality of the two. When the driving rod moves to the first position, the coil spring is used to provide a stable and continuous thrust to the first insulating column by storing energy to ensure that there is a stable contact force between the contacts. When the driving rod moves to the second position, the first insulating column is pulled by the coil spring so that the third conductive column moves downward until the circuit breaker on the column is in the open state. A better application is that the first insulating column and the second insulating column form a plug-in connection relationship through a plug rod and a socket. The plug rod is coaxial with the coil spring, and the socket serves as a mounting hole for the coil spring.

[0038] It also includes a first mounting frame and a second mounting frame, and the base is fixed on the first mounting frame;

[0039] The base is fixed to one end of the first mounting frame, and the other end of the first mounting frame and the second mounting frame are both provided with a hoop with adjustable size;

[0040] It also includes a support rod, one end of which is rotatably connected to one end of a first mounting frame provided with a base through a first latch, and the other end of the support rod is rotatably connected to a second mounting frame through a second latch.

[0041] In the above scheme, the first mounting frame and the second mounting frame are used to install the pole-mounted circuit breaker on the tower pole. The preferred application is that the second mounting frame is used as the bottom mounting frame and the first mounting frame is used as the top mounting frame. In specific applications, the first mounting frame and the second mounting frame are clamped on the tower pole by the hoops on each of them, and the second mounting frame provides bottom support for the cantilever end of the first mounting frame through the support rod. The two ends of the support rod are rotatably connected to the first mounting frame and the second mounting frame through the first latch and the second latch respectively to achieve: in the process of installing the pole-mounted circuit breaker on the tower pole, the structure formed by the first mounting frame, the support rod and the second mounting frame is a variable structure, which facilitates the pole-mounted circuit breaker operation. Preferably, the first latch and the second latch are both detachable, so that the pole-mounted circuit breaker can be disassembled into multiple structures before being mounted on the pole, so as to further facilitate its installation on the tower pole.

[0042] A second conductive column is fixed on each pole, and the second conductive column is electrically connected to the third conductive column through a flexible cable;

[0043] It also includes a coupling module for applying pulses to the line through the pole-mounted circuit breaker, a current transformer for detecting the magnitude of the current passing through the pole-mounted circuit breaker, and an energy-taking transformer for taking energy from the pole-mounted circuit breaker;

[0044] A first coil and a second coil are fixed on each pole. The first coil is arranged in the pole shell of the pole, and the second coil is arranged outside the pole shell. One of the first coil and the second coil serves as the coil of the current transformer, and the other serves as the coil of the energy transformer and the coupling coil of the coupling module.

[0045] In the above scheme, the second conductive column and the first conductive column are used to install the second terminal block and the first terminal block respectively, such as using the first terminal block as the terminal side of the incoming line and the second terminal block as the terminal side of the outgoing line. The flexible cable is used to adapt to the position change of the third conductive column relative to the second conductive column through flexible deformation. One of the first coil and the second coil is used as the coil of the current transformer, and the other is used as the coil of the energy transformer and the coupling coil of the coupling module. This setting method can not only effectively utilize the space of the pole shell, but also enable the scheme to have the ability to detect the current size passing through the pole-mounted circuit breaker and the ability to supply energy to electrical devices. At the same time, it can be used to use the coupling coil to send pulses to the line, that is, a pulse trigger module is connected to the coupling coil. Through active pulse transmission and reception, it is determined whether the line has a fault and the specific location of the fault, so that the line fault detection method based on pulse detection is not affected by whether a valid signal is collected at the time of the fault, thereby improving the accuracy and reliability of fault detection.

[0046] The utility model has the following beneficial effects:

[0047] This solution can synchronously complete the closing and opening actions of each pole, so that each pole maintains the same closing and opening state, and is suitable for synchronous control and maintenance of the conduction state of multi-phase lines;

[0048] When this solution is used in the commonly used 6 to 20KV distribution network system, its normal operation does not require too much energy consumption. The use of energy transformers can meet the demand for electric energy of the electromagnetic coil. This pole-mounted circuit breaker can effectively reduce its energy consumption and convenience of power supply during operation by optimizing its operating mechanism for opening and closing drive;

[0049] The operating mechanism of the pole-mounted circuit breaker provided above also has the characteristics of simple structure. In conjunction with the control module for controlling the electromagnetic coil, it can be well adapted to the disconnection trigger signal from the voltage transformer on the pole-mounted circuit breaker, the disconnection trigger signal from the current transformer on the pole-mounted circuit breaker, the disconnection trigger signal from the feeder terminal equipment, etc., and is suitable for and can effectively serve the smart grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a structural schematic diagram of a specific embodiment of an intelligent primary and secondary integrated pole-mounted circuit breaker described in this solution, which is a main view;

[0051] Figure 2 A structural cross-sectional view of a pole part in a specific embodiment of an intelligent primary-secondary integrated pole-mounted circuit breaker described in this solution;

[0052] Figure 3 for Figure 2 A partial enlarged view of the middle A part;

[0053] Figure 4 This is a structural sectional view of the base portion in a specific embodiment of an intelligent primary-secondary integrated pole-mounted circuit breaker described in this solution, and the sectional view is a partial sectional view.

[0054] The reference numerals in the accompanying drawings are respectively: 1, current transformer, 2, pole, 21, first terminal block, 22, first conductive column, 23, first coil, 24, pole shell, 25, contact, 26, vacuum tube body, 27, bellows, 28, flexible cable, 29, second coil, 210, second conductive column, 211, first insulating column, 212, coil spring, 213, second insulating column, 214, connecting column, 215, third conductive column, 216, boss, 217, insulating ring, 218, second terminal block, 3, base, 31, base shell, 32, connecting rod, 33, support frame, 34, driving rod, 35, moving iron core, 36, electromagnetic coil, 37, first permanent magnet, 38, flexible pad, 39, second permanent magnet, 310, wear-resistant ring, 311, limiting groove, 4, second mounting frame, 41, support rod, 5, first mounting frame. DETAILED DESCRIPTION

[0055] The present invention is further described in detail below in conjunction with the embodiments, but the present invention is not limited to the following embodiments:

[0056] Embodiment 1:

[0057] like Figures 1 to 4 As shown, an intelligent primary-secondary integrated pole-mounted circuit breaker includes a base 3 and a plurality of poles 2 mounted on the base 3, each pole 2 is provided with a first conductive column 22 and a third conductive column 215, each of the first conductive column 22 and the third conductive column 215 is provided with a contact 25 located in a vacuum tube, the third conductive column 215 is fixedly connected with an insulating column for driving the third conductive column 215 to move, and also includes an operating mechanism arranged in the base 3, the operating mechanism serves as a power source for driving the insulating column to move, and the operating mechanism includes an electromagnetic coil 36, a driving rod 34, a linkage mechanism and a locking mechanism;

[0058] The electromagnetic coil 36 is fixed in the base 3, the driving rod 34 is slidably supported in the base 3, and a moving iron core 35 adapted to the electromagnetic coil 36 is arranged on the driving rod 34;

[0059] The insulating column in each pole 2 is connected to the driving rod 34 through a linkage mechanism;

[0060] The locking mechanism includes a first locking mechanism and a second locking mechanism. When the electromagnetic coil 36 drives the driving rod 34 to move to the first position through the moving iron core 35, the contact 25 in each pole 2 is in a closed state, the first locking mechanism locks the driving rod 34 in the first position, and the second locking mechanism is in a state of releasing the driving rod 34. When the electromagnetic coil 36 drives the driving rod 34 to move to the second position through the moving iron core 35, the contact 25 in each pole 2 is in an open state, the second locking mechanism locks the driving rod 34 in the second position, and the first locking mechanism is in a state of releasing the driving rod 34.

[0061] When the present solution is used, the third conductive column 215 is used to be electrically connected to the second conductive column 210, and the first conductive column 22 and the second conductive column 210 are respectively provided with a first terminal block 21 and a second terminal block 218, both of which are terminal blocks. After the first terminal block 21 and the second terminal block 218 are connected to the power grid, when the contacts 25 of the first conductive column 22 and the third conductive column 215 are in contact with each other, the column-mounted circuit breaker is in a closed state, and when the contacts 25 of the first conductive column 22 and the third conductive column 215 are separated from each other, the column-mounted circuit breaker is in an open state. In the operating mechanism, by controlling The driving current provided by the electromagnetic coil 36 provides an electromagnetic force of a specific direction and magnitude to the moving iron core 35, thereby forcing the driving rod 34 to move synchronously with the moving iron core 35. During the movement of the driving rod 34, the linkage mechanism acts on the insulating column, so that the insulating column is used to change the position of the second conductive column 210 on its axis, thereby achieving the purpose of adjusting the contact state of the contact 25. The locking mechanism is used to constrain the position of the driving rod 34 so that the contact 25 can be maintained in a contact state and a separation state. The vacuum tube provides a working environment for the contact 25 to accelerate the extinction of the arc, thereby realizing rapid disconnection of the line.

[0062] The structural features of the pole-mounted circuit breaker provided above include the use of the same electromagnetic coil 36, under the action of the driving rod 34, the linkage mechanism and the locking mechanism, so that the third conductive column 215 in the plurality of poles 2 can be synchronously actuated, and the closing action and opening action of each pole 2 can be synchronously completed in the case of a simple operating mechanism structure, so that each pole 2 can maintain the same closing state and opening state, which is suitable for synchronous control and maintenance of the conduction state of a multi-phase line.

[0063] The structural features of the pole-mounted circuit breaker provided above include using an electromagnetic coil 36 as a driving source and using a locking mechanism as a line conduction state maintaining mechanism. During operation, when opening and closing switching is required, power is supplied to the electromagnetic coil 36. When the required opening and closing states are reached, the locking mechanism can be used to maintain the current line conduction state. During the conduction state maintenance period, the electromagnetic coil 36 can remain in a de-energized state. When this solution is applied to a commonly used 6 to 20KV distribution network system, its normal operation does not require excessive energy consumption. The use of an energy-taking transformer can meet the demand for electric energy of the electromagnetic coil 36. The pole-mounted circuit breaker can effectively reduce its energy consumption and convenience of electric energy supply during operation by optimizing its operating mechanism for realizing opening and closing drive.

[0064] The operating mechanism of the pole-mounted circuit breaker provided above also has the characteristics of simple structure. In conjunction with the control module for controlling the electromagnetic coil 36, it can be well adapted to the disconnection trigger signal from the voltage transformer on the pole-mounted circuit breaker, the disconnection trigger signal from the current transformer 1 on the pole-mounted circuit breaker, the disconnection trigger signal of the feeder terminal equipment, etc., and is suitable for and can effectively serve the smart grid.

[0065] As a person skilled in the art, during the movement of the driving rod 34, the third conductive column 215 is driven to move through the linkage mechanism and the insulating column, thereby changing the contact state of the contact 25, and the first position and the second position are the positions that the driving rod 34 can reach when it moves under the action of the electromagnetic coil 36. The linkage mechanism includes but is not limited to the following linkage mechanism using the connecting rod 32, such as a linkage mechanism including gears and toothed plates, for example, the driving rod 34 and the insulating column are both provided with toothed plate structures, and the toothed plate structures on the driving rod 34 and the insulating column establish a transmission relationship through the gears installed on the base 3, and the linkage mechanism can also adopt a linkage mechanism including a driving plate with a slide groove, for example, the driving plate is fixed on the driving rod 34, and in the axial direction of the driving rod 34, the slide grooves at different positions have different distances from the axis of the driving rod 34, and the lower end of the insulating column is engaged in the slide groove through a pulley / slide rod, and when the driving rod 34 moves, the operation of the slide groove acts on the pulley / slide rod, thereby driving the third conductive column 215 to move up and down. The locking mechanism includes but is not limited to the following structure using the first permanent magnet 37 and the second permanent magnet 39, such as an annular groove coaxial with the driving rod 34 is set on the driving rod 34, the locking mechanism includes a locking ring sleeved on the outside of the driving rod 34, the locking ring is supported by a spring with a steel ball, as the driving rod 34 moves, when the annular groove moves to the same position as the steel ball, the steel ball is embedded in the annular groove under the support of the spring, so that the position of the driving rod 34 is locked after the electromagnetic coil 36 is powered off, when the position of the driving rod 34 needs to be adjusted, the electromagnetic force provided by the electromagnetic coil 36 to the driving rod 34 forces the spring to slide out of the annular groove under the action of the steel ball, so that the driving rod 34 can move to the next required position, the locking ring, the spring and the steel ball can also be replaced by an elastic claw connected to the base 3 at one end, that is, the driving rod 34 is locked when the teeth of the elastic claw are embedded in the annular groove.

[0066] Embodiment 2:

[0067] This embodiment is further refined on the basis of embodiment 1:

[0068] A connecting column 214 is provided at the bottom of each insulating column, and the linkage mechanism includes a connecting rod 32, the upper end of the connecting rod 32 is hingedly connected to the connecting column 214, and the lower end of the connecting rod 32 is hingedly connected to the driving rod 34;

[0069] The driving rod 34 is slidably supported in the base 3 through a supporting frame 33 fixed on the base 3 .

[0070] The above provides a specific linkage mechanism implementation method and a support form for the drive rod 34. Specifically, when the drive rod 34 moves linearly along its axis under the constraint of the base 3, the connecting rod 32 is turned to drive the connecting column 214 to move up and down, thereby achieving the purpose of linking the third conductive column 215 with the drive rod 34. The support frame 33 is used to maintain the movement accuracy of the drive rod 34 and the matching accuracy of the moving iron core 35 and the electromagnetic coil 36. The preferred implementation method is that the base 3 forms a closed shell structure, and the support frame 33 is set to have at least two. Compared with other implementation methods, the above linkage mechanism has the characteristics of simple structure, low failure rate and small size. By supporting the drive rod 34 with the support frame 33, the base 3 can be set as a closed shell structure to ensure the performance reliability of this solution under the premise that the base 3 is small in size.

[0071] Embodiment 3:

[0072] This embodiment is further refined on the basis of Embodiment 2:

[0073] The connecting rod 32 is hingedly connected to the bottom of the connecting column 214 through a hinge shaft. A limiting groove 311 is provided on the base shell 31 of the base 3. The limiting groove 311 is a vertically arranged strip groove. The end of the hinge shaft is slidably fitted in the limiting groove 311.

[0074] The driving rod 34 or the supporting frame 33 is provided with a wear-resistant ring 310 , and the surface of the wear-resistant ring 310 serves as a contact surface between the driving rod 34 and the supporting frame 33 .

[0075] In the above scheme, the base 3 provides support for the connecting column 214 through the side contact between the hinge shaft and the limit groove 311. Compared with the side of the insulating column directly pressed on the top plate of the base 3, it can not only reduce the requirements on the electromagnetic force of the electromagnetic coil 36, but also reduce the wear rate on the corresponding friction pair. Preferably, a smooth wear-resistant layer is provided on the contact surface where each of the hinge shaft and the strip groove contacts the other. The wear-resistant ring 310 has the same function as the wear-resistant layer and is used to reduce the wear rate on the corresponding friction pair during the movement of the drive rod 34 relative to the support frame 33.

[0076] Embodiment 4:

[0077] This embodiment is further refined on the basis of embodiment 1:

[0078] The first locking mechanism and the second locking mechanism both include a first permanent magnet 37, a flexible pad 38 and a second permanent magnet 39, wherein the second permanent magnet 39 is fixed on the base housing 31 of the base 3, and the flexible pad 38 is fixed on the first permanent magnet 37 or the second permanent magnet 39;

[0079] The states of the first locking mechanism and the second locking mechanism locking the driving rod 34 are both: the first permanent magnet 37 and the second permanent magnet 39 are in an attracted state, and the flexible pad 38 is clamped between the first permanent magnet 37 and the second permanent magnet 39 and undergoes elastic compression deformation;

[0080] The states of the first locking mechanism and the second locking mechanism releasing the driving rod 34 are both: relative to the attracted state, the first permanent magnet 37 and the second permanent magnet 39 are in a state of being away from each other.

[0081] The above scheme provides a specific implementation form of the first locking mechanism and the second locking mechanism. When the first permanent magnet 37 and the second permanent magnet 39 are in a relatively close position, the larger magnetic force between the first permanent magnet 37 and the second permanent magnet 39 is used to maintain the position of the driving rod 34 in the base 3, thereby maintaining the relative position of the third conductive column 215 and the first conductive column 22. When the electromagnetic coil 36 forces the first permanent magnet 37 and the second permanent magnet 39 to have a larger position, the first permanent magnet 37 and the second permanent magnet 39 have a smaller magnetic force, so During the process of changing the position of the driving rod 34, when the first locking mechanism is in a state of locking the driving rod 34, the second locking mechanism is in a state of releasing the driving rod 34; when the second contraction mechanism is in a state of locking the driving rod 34, the first locking mechanism is in a state of releasing the driving rod 34. The flexible pad 38 serves as an elastic cushion layer between the first permanent magnet 37 and the second permanent magnet 39 on each locking mechanism, and is used to avoid direct collision between the first permanent magnet 37 and the second permanent magnet 39 when they approach each other, thereby achieving the purpose of protecting the first permanent magnet 37 and the second permanent magnet 39.

[0082] Embodiment 5:

[0083] This embodiment is further refined on the basis of Embodiment 4:

[0084] The flexible pad 38 is fixed on the second permanent magnet 39 , and the flexible pad 38 includes a rubber layer, and a cloth fabric layer is fixed on one side of the rubber layer close to the first permanent magnet 37 .

[0085] In the above scheme, the rubber layer serves as the elastic layer of the flexible pad 38, and the cloth fabric layer serves as the contact layer between the flexible pad 38 and the first permanent magnet 37, so as to prevent the first permanent magnet 37 from adhering to the flexible pad 38 during the long-term compression between the flexible pad 38 and the first permanent magnet 37.

[0086] Embodiment 6:

[0087] This embodiment is further refined on the basis of embodiment 1:

[0088] The vacuum tube comprises a vacuum tube body 26 and a bellows 27. The vacuum tube body 26 and the bellows 27 form a vacuum chamber of the vacuum tube. The contact 25 is located in the vacuum chamber.

[0089] The vacuum tube body 26 is located on the upper side of the bellows 27, the first conductive column 22 is fixed to the end plate on the upper side of the vacuum tube body 26, a cylindrical boss 216 is provided on the end plate on the lower side of the vacuum tube body 26, and the upper end of the bellows 27 is sleeved on the outer side of the boss 216 and is sealed and connected to the boss 216;

[0090] An annular insulating ring 217 is sleeved on the third conductive column 215 . The insulating ring 217 is a ceramic ring. The insulating ring 217 is fixedly connected and sealed to the third conductive column 215 . The lower end of the bellows 27 is sleeved on the outer surface of the insulating ring 217 and is sealed to the insulating ring 217 .

[0091] The above scheme provides a specific implementation form of the vacuum tube. Specifically, the first conductive column 22 is fixedly connected to the upper end of the vacuum tube body 26, and the third conductive column 215 is movably connected to the vacuum tube body 26 through the bellows 27. The bellows 27 is located at the lower outer side of the vacuum tube body 26. The boss 216 and the insulating ring 217 provided above serve as a connecting structure and a heat insulation structure. With this structure, under the heat of the arc generated during the disconnection process of the contact 25, the bellows 27 located outside the vacuum tube body 26 not only has a good heat dissipation ability, but also has a long distance from the arc. Under the action of the heat insulation structure, the thermal resistance between the bellows 27 and the third conductive column 215 can be effectively increased, and the influence of the heat generated by the arc on the bellows 27 can be reduced, thereby achieving the purpose of ensuring the life of the bellows 27.

[0092] Embodiment 7:

[0093] This embodiment is further refined on the basis of Embodiment 6:

[0094] The upper end of the bellows 27 is connected to the boss 216 via a first bayonet assembly, wherein the first bayonet assembly includes a slot and a convex portion, one of which is disposed on the outer side of the boss 216 and the other is disposed on the inner side of the bellows 27, and the slot and the convex portion are engaged with each other;

[0095] The lower end of the bellows 27 is connected to the insulating ring 217 through a second bayonet assembly, and the second bayonet assembly includes a slot and a protrusion. One of the slot and the protrusion of the second bayonet assembly is arranged on the outer side of the insulating ring 217, and the other is arranged on the inner side of the bellows 27, and the slot and the protrusion are engaged with each other.

[0096] In the above scheme, the thrust and tension between the bellows 27 and the boss 216, and between the bellows 27 and the insulating ring 217 are transmitted through the first bayonet assembly and the second bayonet assembly, thereby ensuring the connection reliability of the bellows 27 and the sealing of the vacuum chamber.

[0097] Embodiment 8:

[0098] This embodiment is further refined on the basis of embodiment 1:

[0099] The insulating column includes a first insulating column 211 fixedly connected to the lower end of the third conductive column 215 and coaxially, and the insulating column also includes a second insulating column 213 located at the lower end of the first insulating column 211 and plugged into the first insulating column 211, and the linkage mechanism is connected to the insulating column through the second insulating column 213;

[0100] It also includes a coil spring 212 whose upper end is fixedly connected to the first insulating column 211 and whose lower end is fixedly connected to the second insulating column 213. When the drive rod 34 is in the first position, the coil spring 212 is in a compressed state, and when the drive rod 34 is in the second position, the coil spring 212 is in a stretched state.

[0101] The above scheme provides a split-type structural scheme in which the insulating column includes a first insulating column 211 and a second insulating column 213. The first insulating column 211 and the second insulating column 213 have a plug-in relationship to maintain the coaxiality of the two. When the driving rod 34 moves to the first position, the coil spring 212 is used to provide a stable and continuous thrust to the first insulating column 211 by storing energy, so as to ensure a stable contact force between the contacts 25. When the driving rod 34 moves to the second position, the first insulating column 211 is pulled by the coil spring 212, so that the third conductive column 215 moves downward until the circuit breaker on the column is in the open state. A preferred application is that the first insulating column 211 and the second insulating column 213 form a plug-in connection relationship through a plug rod and a socket, the plug rod is coaxial with the coil spring 212, and the socket serves as a mounting hole for the coil spring 212.

[0102] Embodiment 9:

[0103] This embodiment is further refined on the basis of embodiment 1:

[0104] It also includes a first mounting frame 5 and a second mounting frame 4, and the base 3 is fixed on the first mounting frame 5;

[0105] The base 3 is fixed to one end of the first mounting frame 5, and the other end of the first mounting frame 5 and the second mounting frame 4 are both provided with a hoop with adjustable size;

[0106] It also includes a support rod 41, one end of which is rotatably connected to one end of the first mounting frame 5 provided with the base 3 through a first latch, and the other end of the support rod 41 is rotatably connected to the second mounting frame 4 through a second latch.

[0107] In the above scheme, the first mounting frame 5 and the second mounting frame 4 are used to install the pole-mounted circuit breaker on the tower pole. The preferred application is that the second mounting frame 4 is used as the bottom mounting frame and the first mounting frame 5 is used as the top mounting frame. In specific applications, the first mounting frame 5 and the second mounting frame 4 are clamped on the tower pole by the hoops on them. The second mounting frame 4 provides bottom support for the cantilever end of the first mounting frame 5 through the support rod 41. The two ends of the support rod 41 are rotatably connected to the first mounting frame 5 and the second mounting frame 4 through the first latch and the second latch respectively to achieve: in the process of installing the pole-mounted circuit breaker on the tower pole, the structure formed by the first mounting frame 5, the support rod 41 and the second mounting frame 4 is a variable structure, which is convenient for completing the pole-mounted circuit breaker pole-mounting operation. Preferably, the first latch and the second latch are both detachable, so that the pole-mounted circuit breaker can be disassembled into multiple structures before being mounted on the pole, so as to further facilitate its installation on the tower pole.

[0108] Embodiment 10:

[0109] This embodiment is further refined on the basis of embodiment 1:

[0110] A second conductive column 210 is fixed on each pole 2, and the second conductive column 210 is electrically connected to the third conductive column 215 via a flexible cable 28;

[0111] It also includes a coupling module for applying pulses to the line through the pole-mounted circuit breaker, a current transformer for detecting the magnitude of the current passing through the pole-mounted circuit breaker, and an energy-taking transformer for taking energy from the pole-mounted circuit breaker;

[0112] A first coil 23 and a second coil 29 are fixed on each pole 2. The first coil 23 is arranged in the pole shell 24 of the pole 2, and the second coil 29 is arranged outside the pole shell 24. One of the first coil 23 and the second coil 29 serves as the coil of the current transformer, and the other serves as the coil of the energy transformer and the coupling coil of the coupling module.

[0113] In the above scheme, the second conductive column 210 and the first conductive column 22 are used to install the second terminal block 218 and the first terminal block 21 respectively. For example, the first terminal block 21 is used as the wiring side of the incoming line, and the second terminal block 218 is used as the wiring side of the outgoing line. The flexible cable 28 is used to adapt to the position change of the third conductive column 215 relative to the second conductive column 210 through flexible deformation. One of the first coil 23 and the second coil 29 is used as the coil of the current transformer 1, and the other is used as the coil of the energy transformer and the coupling coil of the coupling module. This setting method can not only effectively utilize the space of the pole housing 24, but also enable the present scheme to have the ability to detect the current size passed by the pole-mounted circuit breaker and the ability to supply energy to electrical devices. At the same time, it can be used to use the coupling coil to send pulses to the line, that is, the coupling coil is connected to a pulse trigger module, and through active pulse transmission and reception, it is determined whether the line has a fault and the specific location of the fault, so that the line fault detection method based on pulse detection is not affected by whether a valid signal is collected at the time of the fault, thereby improving the accuracy and reliability of fault detection.

[0114] In a specific embodiment, the current transformer 1 adopts a Rogowski coil current transformer. In this embodiment, the pole-mounted circuit breaker also includes a voltage transformer (which is a prior art and not shown in the figure). In order to reduce the structural volume of this solution, the voltage transformer adopts a capacitor voltage divider voltage transformer.

[0115] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, other embodiments derived without departing from the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent primary-secondary integrated pole-mounted circuit breaker, comprising a base (3) and a plurality of poles (2) mounted on the base (3), each pole (2) being provided with a first conductive column (22) and a third conductive column (215), each of the first conductive column (22) and the third conductive column (215) being provided with a contact (25) located in a vacuum tube, an insulating column for driving the third conductive column (215) to move being fixedly connected to the third conductive column (215), and also comprising an operating mechanism arranged in the base (3), the operating mechanism being a power source for driving the insulating column to move, characterized in that: The operating mechanism comprises an electromagnetic coil (36), a driving rod (34), a linkage mechanism and a locking mechanism; The electromagnetic coil (36) is fixed in the base (3), the driving rod (34) is slidably supported in the base (3), and a moving iron core (35) matching the electromagnetic coil (36) is provided on the driving rod (34); The insulating columns in each pole (2) are drivingly connected to the driving rod (34) via a linkage mechanism; The locking mechanism comprises a first locking mechanism and a second locking mechanism. When the electromagnetic coil (36) drives the driving rod (34) to move to a first position via the moving iron core (35), the contact (25) in each pole (2) is in a closed state, the first locking mechanism locks the driving rod (34) in the first position, and the second locking mechanism is in a state of releasing the driving rod (34). When the electromagnetic coil (36) drives the driving rod (34) to move to a second position via the moving iron core (35), the contact (25) in each pole (2) is in an open state, the second locking mechanism locks the driving rod (34) in the second position, and the first locking mechanism is in a state of releasing the driving rod (34).

2. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 1 is characterized in that: A connecting column (214) is provided at the bottom of each insulating column, and the linkage mechanism comprises a connecting rod (32), the upper end of the connecting rod (32) is hingedly connected to the connecting column (214), and the lower end of the connecting rod (32) is hingedly connected to the driving rod (34); The driving rod (34) is slidably supported in the base (3) via a support frame (33) fixed on the base (3).

3. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 2 is characterized in that: The connecting rod (32) is hingedly connected to the bottom of the connecting column (214) via a hinge shaft, and a limiting groove (311) is provided on the base shell (31) of the base (3), wherein the limiting groove (311) is a vertically arranged strip groove, and the end of the hinge shaft is slidably fitted in the limiting groove (311); The driving rod (34) or the supporting frame (33) is provided with a wear-resistant ring (310), and the surface of the wear-resistant ring (310) serves as a contact surface between the driving rod (34) and the supporting frame (33).

4. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 1 is characterized in that: The first locking mechanism and the second locking mechanism both comprise a first permanent magnet (37), a flexible pad (38) and a second permanent magnet (39), wherein the second permanent magnet (39) is fixed to a base housing (31) of the base (3), and the flexible pad (38) is fixed to the first permanent magnet (37) or the second permanent magnet (39); The first locking mechanism and the second locking mechanism lock the driving rod (34) in the following states: the first permanent magnet (37) and the second permanent magnet (39) are in an attracted state, and the flexible pad (38) is clamped between the first permanent magnet (37) and the second permanent magnet (39) and undergoes elastic compression deformation; The states of the first locking mechanism and the second locking mechanism releasing the driving rod (34) are both such that, relative to the attracted state, the first permanent magnet (37) and the second permanent magnet (39) are in a state of being away from each other.

5. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 4 is characterized in that: The flexible pad (38) is fixed on the second permanent magnet (39), and the flexible pad (38) comprises a rubber layer, and a cloth fabric layer is fixed on a side of the rubber layer close to the first permanent magnet (37).

6. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 1 is characterized in that: The vacuum tube comprises a vacuum tube body (26) and a bellows (27), the vacuum tube body (26) and the bellows (27) forming a vacuum chamber of the vacuum tube, and the contact (25) is located in the vacuum chamber; The vacuum tube body (26) is located on the upper side of the bellows (27); the first conductive column (22) is fixed to the end plate on the upper side of the vacuum tube body (26); a cylindrical boss (216) is provided on the end plate on the lower side of the vacuum tube body (26); the upper end of the bellows (27) is sleeved on the outer side of the boss (216) and is sealed and connected to the boss (216); An annular insulating ring (217) is sleeved on the third conductive column (215); the insulating ring (217) is a ceramic ring; the insulating ring (217) is fixedly connected and sealed to the third conductive column (215); the lower end of the bellows (27) is sleeved on the outer surface of the insulating ring (217) and is sealed to the insulating ring (217).

7. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 6, characterized in that: The upper end of the bellows (27) is connected to the boss (216) via a first bayonet assembly, the first bayonet assembly comprising a slot and a convex portion, one of the slot and the convex portion of the first bayonet assembly being arranged on the outer side surface of the convex portion (216) and the other being arranged on the inner side surface of the bellows (27), the slot and the convex portion being engaged with each other; The lower end of the bellows (27) is connected to the insulating ring (217) via a second bayonet assembly, the second bayonet assembly comprising a bayonet slot and a bayonet protrusion, one of the bayonet slot and the bayonet protrusion of the second bayonet assembly being arranged on the outer side surface of the insulating ring (217) and the other being arranged on the inner side surface of the bellows (27), the bayonet slot and the bayonet protrusion being engaged with each other.

8. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 1 is characterized in that: The insulating column comprises a first insulating column (211) fixedly connected to the lower end of the third conductive column (215) and coaxially connected thereto, the insulating column further comprising a second insulating column (213) located at the lower end of the first insulating column (211) and plug-connected to the first insulating column (211), the linkage mechanism being connected to the insulating column via the second insulating column (213); It also includes a coil spring (212) whose upper end is fixedly connected to the first insulating column (211) and whose lower end is fixedly connected to the second insulating column (213); when the drive rod (34) is in the first position, the coil spring (212) is in a compressed state; and when the drive rod (34) is in the second position, the coil spring (212) is in a stretched state.

9. The intelligent primary and secondary integrated pole mounted circuit breaker according to claim 1, characterized in that: It also comprises a first mounting frame (5) and a second mounting frame (4), wherein the base (3) is fixed on the first mounting frame (5); The base (3) is fixed to one end of the first mounting frame (5), and the other end of the first mounting frame (5) and the second mounting frame (4) are both provided with a hoop with adjustable size; It also comprises a support rod (41), one end of the support rod (41) being rotatably connected to one end of a first mounting frame (5) provided with a base (3) via a first latch, and the other end of the support rod (41) being rotatably connected to a second mounting frame (4) via a second latch.

10. An intelligent primary and secondary integrated pole mounted circuit breaker according to any one of claims 1 to 9, characterized in that: A second conductive column (210) is fixed on each pole (2), and the second conductive column (210) is electrically connected to a third conductive column (215) via a flexible cable (28); It also includes a coupling module for applying pulses to the line through the pole-mounted circuit breaker, a current transformer for detecting the magnitude of the current passing through the pole-mounted circuit breaker, and an energy-taking transformer for taking energy from the pole-mounted circuit breaker; A first coil (23) and a second coil (29) are fixed on each pole (2); the first coil (23) is arranged in a pole shell (24) of the pole (2); the second coil (29) is arranged outside the pole shell (24); one of the first coil (23) and the second coil (29) serves as a coil of a current transformer, and the other serves as a coil of an energy transformer and a coupling coil of a coupling module.

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