A pole-mounted circuit breaker

Abstract

The application discloses a pole-mounted circuit breaker, comprising a pole, a disconnector and a line side terminal, the pole is provided with an upper outgoing line end; the disconnector is arranged on the upper outgoing line side of the pole, the disconnector comprises an isolation knife, the first end of the isolation knife is rotationally and conductively connected with the upper outgoing line end, the upper outgoing line end constitutes a rotation supporting part of the isolation knife, and the second end of the isolation knife can swing around the rotation supporting part to contact and conduct or separate and disconnect with the line side terminal. The application can solve the problem that in the existing pole-mounted circuit breaker, the operation reaction force transmission path of the disconnector is relatively long, the pole is prone to cracking or damage due to bearing a relatively large bending load.

Description

Technical Field

[0001] This application relates to the field of high-voltage switchgear technology, and in particular to a pole-mounted circuit breaker. Background Technology

[0002] Pole-mounted circuit breakers are widely used in power distribution lines to achieve line switching control, fault protection, and isolation maintenance. Existing pole-mounted circuit breakers typically have the disconnecting switch located at the bottom of the pole. When the disconnecting switch is opened or closed, the operating force must be transmitted to the fixed part of the equipment via a relatively long structural path.

[0003] As the voltage level of the product increases, the insulation distance, contact pressure, and disconnector operating force also increase accordingly. This makes the pole, especially its root, susceptible to large bending loads. Long-term repeated operation may cause the pole to crack or be damaged, affecting the lifespan and operational reliability of the equipment.

[0004] Therefore, optimizing the force application and transmission method of disconnect switches is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this application is to provide a pole-mounted circuit breaker to solve the problems of long operating reaction force transmission path of disconnecting switches and easy cracking or damage of poles due to large bending loads in existing pole-mounted circuit breakers.

[0006] To achieve the above objectives, this application provides a pole-mounted circuit breaker, including a pole, a disconnecting switch, and line-side terminals, wherein the pole is provided with an upper outgoing terminal;

[0007] The disconnecting switch is disposed on the upper outgoing line side of the pole post. The disconnecting switch includes an isolation blade. The first end of the isolation blade is rotatably connected to and electrically connected to the upper outgoing line end. The upper outgoing line end constitutes a rotating support part of the isolation blade. The second end of the isolation blade can swing around the rotating support part to contact and conduct or disconnect with the line side terminal.

[0008] Optionally, the first end of the isolation blade is rotatably connected to the upper outlet end via a pivot structure, the pivot structure being disposed on the rotating support portion.

[0009] Optionally, the first end of the isolation blade and the upper output end are respectively provided with mutually contacting metal conductive surfaces, so that the isolation blade maintains a conductive connection with the upper output end during rotation.

[0010] Optionally, the isolation blade is a long strip-shaped conductive component, and the second end of the isolation blade is provided with a conductive contact for making contact with the line-side terminal.

[0011] Optionally, the isolating blade has a drive hinge portion between the first end and the second end, and the isolating switch further includes an insulating pull rod, the first end of which is hinged to the drive hinge portion.

[0012] Optionally, it also includes an operating shaft and a transmission crank arm fixed to the operating shaft, wherein the second end of the insulating pull rod is hinged to the transmission crank arm to drive the isolation knife to swing through the transmission crank arm and the insulating pull rod when the operating shaft rotates.

[0013] Optionally, it also includes a housing and an operating handle, the operating shaft being rotatably mounted on the housing and the operating handle being connected to the operating shaft.

[0014] Optionally, it also includes a housing and a supporting insulator, the supporting insulator being erected on the upper part of the housing, and the line-side terminal being disposed at the upper end of the supporting insulator.

[0015] Optionally, the line-side terminal is disposed on the swing path of the second end of the isolation blade, and when the second end of the isolation blade is separated from the line-side terminal, a visible air gap is formed between them.

[0016] Optionally, the electrode post is provided with a vacuum interrupter and a conductor, and the vacuum interrupter is electrically connected to the upper output terminal through the conductor; the electrode post is an epoxy resin casting and sealing structure, and the outside of the electrode post is covered with a silicone insulating layer.

[0017] The beneficial effect of this application is that the disconnecting switch is installed on the upper outgoing line side of the pole post. The first end of the disconnecting blade is rotatably connected to the upper outgoing line end of the pole post, and the disconnecting blade is mechanically supported by the rotating support portion formed by the upper outgoing line end. The second end of the disconnecting blade swings around the rotating support portion, thereby contacting or separating from the line-side terminal. When the disconnecting blade is operated for opening and closing, the operating force acting on the disconnecting blade forms a supporting reaction force at its first end. This supporting reaction force is directly transmitted to the upper outgoing line end of the pole post through the rotating support portion, without needing to transmit it to the fixed position at the bottom of the pole post along the length direction as in the traditional bottom-mounted disconnecting switch structure. Therefore, the transmission path of the operating reaction force is shortened, and the bending moment generated by the long force transmission distance is reduced, thereby reducing the risk of cracking or damage to the root of the pole post due to repeated bending loads.

[0018] Meanwhile, the first end of the isolating blade is electrically connected to the upper outgoing terminal, so that the upper outgoing terminal not only forms the rotating support part of the isolating blade, but is also electrically connected to the isolating blade. That is, the upper outgoing terminal simultaneously undertakes the functions of mechanical support and electrical connection, which helps to reduce unnecessary transition connection structures, shorten the conductive path, and make the overall structure of the isolating switch more compact and the connection relationship simpler. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the pole-mounted circuit breaker structure provided in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the disconnector switch structure in the closed state provided in the embodiments of this application;

[0022] Figure 3 This is a schematic diagram of the disconnecting switch structure in the open state provided in the embodiments of this application.

[0023] In the diagram: 1-Pole post; 2-Upper outlet terminal; 3-Pivot structure; 4-Isolation knife; 5-Drive hinge part; 6-Line side terminal; 7-Support insulator; 8-Insulating pull rod; 9-Operating handle; 10-Transmission crank arm; 11-Housing shell; 12-Operating shaft. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that in this embodiment, the orientation or positional relationship indicated by terms such as "upper," "lower," "front," and "rear" is based on the orientation or positional relationship shown in the accompanying drawings. It is used only for the convenience of describing this application and for simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figures 1 to 3As shown, in this embodiment, a pole-mounted circuit breaker is provided, including a pole 1, a disconnecting switch, and a line-side terminal 6. The pole 1 is vertically disposed on the upper part of the housing 11, and the upper end of the pole 1 is provided with an upper outgoing terminal 2. The upper outgoing terminal 2 is electrically connected to the conductive circuit inside the pole 1 and extends out of the upper part of the pole 1 for the installation of the disconnecting switch 4.

[0028] The disconnecting switch is located on the upper outgoing line side of the pole 1, that is, above or near the upper end of the pole 1. The disconnecting switch includes an isolating blade 4, which has a first end and a second end arranged opposite each other along its length. The first end of the isolating blade 4 is rotatably connected to and electrically connected to the upper outgoing line terminal 2. The upper outgoing line terminal 2 supports the first end of the isolating blade 4 and forms a rotating support portion when the isolating blade 4 swings. The second end of the isolating blade 4 extends from the upper outgoing line terminal 2 towards the line-side terminal 6 and can swing about the rotating support portion where the first end is located.

[0029] When the isolating blade 4 swings towards the line-side terminal 6 to the closed position, the second end of the isolating blade 4 contacts the line-side terminal 6, forming a continuous conductive path between the upper outgoing terminal 2, the isolating blade 4, and the line-side terminal 6. When the isolating blade 4 swings away from the line-side terminal 6 to the open position, the second end of the isolating blade 4 separates from the line-side terminal 6, breaking the conductive path between the upper outgoing terminal 2 and the line-side terminal 6.

[0030] Because the isolating blade 4 is directly mounted on the upper outgoing side of the pole post 1 and supported by the rotating support portion formed by the upper outgoing end 2, the supporting reaction force generated when the isolating blade 4 operates is first transmitted to the upper outgoing end 2 via the first end of the isolating blade 4, instead of being transmitted to the lower part of the pole post 1 via a longer connection path as in the traditional bottom-mounted disconnecting switch structure. This shortens the transmission path of the disconnecting switch's operating reaction force and reduces the bending load formed at the root of the pole post 1 due to the long force transmission distance.

[0031] The first end of the isolation blade 4 is rotatably connected to the upper outlet end 2 via a pivot structure 3, which is disposed on the rotatable support portion formed by the upper outlet end 2. Specifically, the upper outlet end 2 is provided with a connecting portion for mounting the isolation blade 4, and the first end of the isolation blade 4 is provided with a hinge hole corresponding to the connecting portion. The pivot structure 3 passes through the connecting portion of the upper outlet end 2 and the hinge hole at the first end of the isolation blade 4, thereby mounting the isolation blade 4 on the upper outlet end 2. The isolation blade 4 can rotate about the axis of the pivot structure 3, and the pivot structure 3 transmits the load on the first end of the isolation blade 4 to the upper outlet end 2.

[0032] The pivot structure 3 can be a pin, which passes through the isolation blade 4 and the upper cable outlet 2, and is axially limited by a nut, snap ring, or limit pin to prevent the pin from coming out of the installation position during the repeated swinging of the isolation blade 4. The upper cable outlet 2 can also be provided with two oppositely arranged connecting ears, with the first end of the isolation blade 4 located between the two connecting ears. The pivot structure 3 passes through the two connecting ears and the isolation blade 4 in sequence, thereby providing lateral support for the isolation blade 4.

[0033] In a three-phase pole-mounted circuit breaker, the axes of the three pivot structures 3 are parallel to each other, so that the three isolating blades 4 have the same swing direction. Each pivot structure 3 is set at the upper output end 2 of the corresponding pole 1, so there is no need to set a rotation fulcrum of the isolating blade 4 at the lower part of the pole 1.

[0034] The first end of the isolation blade 4 and the upper output end 2 are respectively provided with mutually contacting metal conductive surfaces. The metal conductive surface of the upper output end 2 can be set on the opposite side of the two connecting ears. The metal conductive surface of the first end of the isolation blade 4 is correspondingly set on both sides of the isolation blade 4 and keeps in contact with the opposite side of the two connecting ears respectively.

[0035] In addition to defining the rotation axis of the isolation blade 4, the pivot structure 3 also allows the first end of the isolation blade 4 to press against the upper outlet end 2. The tightness of the end of the pivot structure 3 can be set according to the contact pressure required by the metal conductive surfaces, so that the two metal conductive surfaces can make stable contact without hindering the normal swing of the isolation blade 4.

[0036] With the above structure, the upper output terminal 2 simultaneously serves as the mechanical support position and electrical conduction position of the isolation knife 4, eliminating the need for a long transition conductive component between the upper output terminal 2 and the isolation knife 4, thereby reducing the number of conductive connection points.

[0037] The isolating blade 4 is a long, strip-shaped conductive component. It can be made of a conductive metal plate, extending from the first end to the second end along its length. The isolating blade 4 has a cross-sectional area sufficient to meet the rated current requirements and the mechanical strength necessary to withstand the loads of opening and closing operations.

[0038] The second end of the isolating blade 4 is provided with a conductive contact, which is used to contact the line-side terminal 6. The conductive contact can be integrally manufactured with the isolating blade 4, or it can be separately manufactured and fixed to the second end of the isolating blade 4. The conductive contact and the isolating blade 4 can be connected by bolts, riveting, or welding.

[0039] The line-side terminal 6 is provided with a contact portion that mates with the conductive contact. When the isolating blade 4 swings to the closed position, the conductive contact at the second end of the isolating blade 4 makes tight contact with the contact portion of the line-side terminal 6. The contact portion of the line-side terminal 6 can adopt a clamping structure. After the second end of the isolating blade 4 enters the clamping structure, the oppositely arranged contact pieces apply a clamping force to the isolating blade 4 to ensure a stable contact pressure between the conductive contact and the line-side terminal 6.

[0040] Please refer to Figure 2 When the isolating knife 4 is in the closed position, the current passes through the pole 1, the upper outgoing terminal 2, the first end of the isolating knife 4, the body of the isolating knife 4, the conductive contact of the second end of the isolating knife 4, and the line-side terminal 6 in sequence, and is then transmitted to the external line by the line-side terminal 6.

[0041] The isolation blade 4 has a drive hinge part 5 between the first end and the second end. The drive hinge part 5 is located in the middle region of the isolation blade 4 and is spaced apart from the pivot structure 3. The drive hinge part 5 may include a hinge hole provided on the isolation blade 4 and a connecting pin passing through the hinge hole.

[0042] The disconnecting switch also includes an insulating rod 8, the first end of which is hinged to the drive hinge part 5. The insulating rod 8 can rotate relative to the isolating blade 4 to adapt to the change of the included angle between the insulating rod 8 and the isolating blade 4 during the swinging process of the isolating blade 4.

[0043] The main body of the insulating rod 8 is made of insulating material, and the first end of the insulating rod 8 is connected to the drive hinge part 5 through a connecting pin. The outer periphery of the insulating rod 8 is provided with multiple spaced insulating skirts to increase the creepage distance on the surface of the insulating rod 8, so as to keep the isolation knife 4 insulated from the transmission component located in the housing 11.

[0044] The insulating rod 8 extends between the isolating blade 4 and the housing 11. When the insulating rod 8 moves in one direction, it pushes the isolating blade 4 to swing around the pivot structure 3 toward the line-side terminal 6 via the drive hinge part 5. When the insulating rod 8 moves in the opposite direction, it pulls the isolating blade 4 away from the line-side terminal 6 via the drive hinge part 5.

[0045] There is a certain distance between the drive hinge 5 and the pivot structure 3, which constitutes the force arm for driving the isolation blade 4 to rotate. The drive hinge 5 is located between the first end and the second end of the isolation blade 4, which can reduce the required stroke of the insulating rod 8 while satisfying the swing angle of the isolation blade 4, and make the force applied by the insulating rod 8 to the isolation blade 4 directly act on the body of the isolation blade 4.

[0046] The pole-mounted circuit breaker also includes an operating shaft 12 and a transmission crank arm 10. The operating shaft 12 extends along the arrangement direction of the three-phase poles 1 and is rotatably mounted on the housing 11. The three disconnecting switches can share one operating shaft 12 to achieve three-phase synchronous operation.

[0047] Each phase disconnector is equipped with a corresponding transmission crank arm 10, which is fixed on the operating shaft 12. One end of the transmission crank arm 10 is connected to the operating shaft 12, and the other end of the transmission crank arm 10 is hinged to the second end of the insulating pull rod 8. The transmission crank arm 10 and the insulating pull rod 8 can be rotatably connected by a connecting pin.

[0048] When the operating shaft 12 rotates around its own axis, the transmission crank arm 10 fixed on the operating shaft 12 swings with the operating shaft 12. The end of the transmission crank arm 10 connected to the insulating pull rod 8 moves around the axis of the operating shaft 12, thereby driving the insulating pull rod 8 to move upward or downward. The insulating pull rod 8 then drives the isolation knife 4 to swing around the pivot structure 3 through the drive hinge part 5.

[0049] Three transmission crank arms 10 are arranged at intervals along the axial direction of the operating shaft 12 and are respectively connected to three insulating tie rods 8. When the operating shaft 12 rotates, the three transmission crank arms 10 swing synchronously, so that the three isolating switches 4 reach the closed or open position at the same time, avoiding asynchronous operation of the three-phase isolating switches.

[0050] The transmission crank arm 10 and the operating shaft 12 can be connected by welding, keying, or bolting. The installation angle of each transmission crank arm 10 on the operating shaft 12 should be consistent to ensure that the travel stroke of each phase insulating tie rod 8 is basically the same.

[0051] The pole-mounted circuit breaker also includes a housing 11 and an operating handle 9. The housing 11 is located below the pole post 1 and the supporting insulator 7, and is used to install and support the various components of the pole-mounted circuit breaker. The lower ends of the pole post 1 and the supporting insulator 7 are respectively fixed to the upper part of the housing 11.

[0052] The operating shaft 12 is rotatably mounted on the housing 11 via a bushing or bearing seat. Support holes may be provided on opposite sides of the housing 11, through which the operating shaft 12 passes and can rotate relative to the housing 11. A limiting element may be provided between the operating shaft 12 and the housing 11 to limit the maximum rotation angle of the operating shaft 12 in the closing and opening directions.

[0053] The operating handle 9 is connected to the operating shaft 12 and extends outward from the housing 11. The operating handle 9 is fixed to the operating shaft 12, and a hook-on part or snap-fit ​​groove for easy operation can be provided on the operating handle 9. The operator can use the insulated operating rod to act on the operating handle 9, so that the operating handle 9 drives the operating shaft 12 to rotate.

[0054] The operating handle 9 can be a long strip-shaped metal component to increase the lever arm during manual operation. The operating handle 9 and the operating shaft 12 can be connected by welding or detachment. The housing 11 can also be provided with a tripping limit part and a closing limit part that cooperate with the operating handle 9, so that the operating handle 9 stops rotating after reaching the predetermined position, thereby keeping the isolating knife 4 in the corresponding tripping or closing position.

[0055] The pole-mounted circuit breaker also includes a support insulator 7, which is erected on the upper part of the housing 11 and spaced apart from the pole post 1. Each phase pole post 1 is provided with a corresponding support insulator 7, and the line side terminal 6 is located at the upper end of the support insulator 7.

[0056] The lower end of the support insulator 7 is fixed to the housing 11, and the upper end of the support insulator 7 is provided with a connecting seat for installing the line-side terminal 6. The line-side terminal 6 is fixed to the connecting seat by bolts. The support insulator 7 is used to bear the contact load generated when the line-side terminal 6, the external conductor, and the isolating switch 4 are closed, while keeping the line-side terminal 6 and the housing 11 insulated.

[0057] The distance between the pole post 1 and the supporting insulator 7 is set according to the length of the isolating blade 4 and the air insulation distance required in the open state. The height of the supporting insulator 7 matches the installation height of the upper outgoing terminal 2, so that the isolating blade 4 can accurately contact the line-side terminal 6 when it is in the closed state.

[0058] The line-side terminal 6 is located on the swing path of the second end of the isolating blade 4. The isolating blade 4 swings around the pivot structure 3 as the rotation center. The second end of the isolating blade 4 moves along the arc-shaped path. The line-side terminal 6 is located at the closing end position of the arc-shaped path.

[0059] like Figure 2 As shown, when the isolating blade 4 swings to the closed position, the conductive contact at the second end of the isolating blade 4 contacts the line-side terminal 6, and the second end of the isolating blade 4 is clamped or abutted by the line-side terminal 6, thereby forming a stable conductive connection.

[0060] like Figure 3 As shown, when the isolating switch 4 swings from the closed position to the open position, the second end of the isolating switch 4 gradually separates from the line-side terminal 6. When the isolating switch 4 reaches the open position, a visible air gap is formed between the second end of the isolating switch 4 and the line-side terminal 6. This air gap is located outside the pole-mounted circuit breaker, and on-site personnel can directly observe the separation state between the isolating switch 4 and the line-side terminal 6.

[0061] The opening angle of isolating switch 4 and the distance between the second end of isolating switch 4 and the line-side terminal 6 are determined according to the rated voltage and air insulation requirements of the pole-mounted circuit breaker. When isolating switch 4 is in the open position, its second end does not contact the line-side terminal 6 or other live parts, thus forming a clear air isolation gap, which makes it easy for maintenance personnel to determine whether the line has been isolated.

[0062] The pole post 1 contains a vacuum interrupter and a conductor. The vacuum interrupter is used to interrupt and connect the current of the pole-mounted circuit breaker, and the conductor is used to connect the vacuum interrupter to the upper output terminal 2. One end of the vacuum interrupter is electrically connected to the upper output terminal 2 through the conductor, and the other end is electrically connected to the lower output terminal of the pole post 1.

[0063] The pole 1 adopts an epoxy resin casting and sealing structure. During manufacturing, the vacuum interrupter, conductor, and upper lead-out terminal 2 are installed in the casting mold according to the predetermined positions, and then epoxy resin is injected into the mold. After the epoxy resin cures, it fixes the vacuum interrupter and conductor into one piece and forms an insulating layer between the internal conductive components and the outside.

[0064] The outer surface of the pole post 1 is covered with a silicone insulating layer, and multiple insulating skirts are formed around the outer periphery of the silicone insulating layer. The silicone insulating layer is used to improve the external insulation performance of the pole post 1 and reduce the impact of rainwater, dust and dirt on the insulation performance of the pole post 1. The upper lead-out terminal 2 extends from the upper part of the epoxy resin casting and sealing structure and is connected to the conductor inside the pole post 1.

[0065] When closing the circuit breaker, the operator moves the operating handle 9 in the closing direction. The operating handle 9 drives the operating shaft 12 to rotate, and the operating shaft 12 drives the three transmission crank arms 10 to swing synchronously. Each transmission crank arm 10 pulls the corresponding insulating rod 8 downward, and the insulating rod 8 pulls the isolating blade 4 through the drive hinge part 5. The isolating blade 4 swings around the pivot structure 3 toward the line-side terminal 6 until the conductive contact at the second end of the isolating blade 4 makes tight contact with the line-side terminal 6. At this time, the current flows sequentially to the line side through the conductor inside the pole 1, the upper outlet terminal 2, the isolating blade 4, and the line-side terminal 6.

[0066] When opening the circuit breaker, the operator moves the operating handle 9 in the opposite direction to the closing direction, causing the operating shaft 12 to rotate in the opposite direction. The transmission crank arm 10 pushes the isolating blade 4 through the insulating pull rod 8. The isolating blade 4 swings away from the line-side terminal 6 around the pivot structure 3, causing the conductive contact at the second end of the isolating blade 4 to disengage from the line-side terminal 6. After the isolating blade 4 reaches the open position, a visible air gap is formed between the second end of the isolating blade 4 and the line-side terminal 6.

[0067] When the isolating switch 4 is opened or closed, the operating force applied by the insulating pull rod 8 to the drive hinge part 5 causes the isolating switch 4 to rotate around the pivot structure 3. The support reaction force generated at the first end of the isolating switch 4 is directly transmitted to the upper outgoing terminal 2 through the pivot structure 3. Since both the pivot structure 3 and the rotating support part are located at the upper outgoing terminal 2 of the pole post 1, the support reaction force of the isolating switch 4 can be transmitted nearby at the upper end of the pole post 1, avoiding the long-distance force transmission structure when the isolating switch is located below the pole post 1.

[0068] Meanwhile, the upper outgoing terminal 2 serves as both the rotational support position for the isolating switch 4 and the conductive connection position for the isolating switch 4, allowing the mechanical connection structure and the conductive connection structure to be centrally located, reducing the need for independent incoming terminals and transition conductive components. After the isolating switch is installed above the pole 1, it is not necessary to encapsulate the isolating switch and the circuit breaker together in a sealed air box. The air isolation gap formed after the isolating switch 4 is opened can be directly observed, facilitating on-site inspection, status confirmation, and maintenance.

[0069] Furthermore, the three-phase disconnecting switch and its supporting structure are located on the upper part of the housing 11, while the operating shaft 12 and operating handle 9 are located near the housing 11, thus centrally arranging the transmission components of the disconnecting switch along the housing 11. The operating shaft 12 simultaneously drives the three transmission cranks 10, which reduces the time difference between the three-phase opening and closing actions and simplifies the three-phase linkage structure. The overall arrangement also allows for a more balanced mass distribution of the pole-mounted circuit breaker, improving the stress state when the equipment is installed on a pole or overhead support.

[0070] The pole-mounted circuit breaker in this embodiment adopts a three-phase structure, with three poles 1 spaced apart along the length of the outer casing 11. Each pole 1 is respectively equipped with a set of disconnecting switches, line-side terminals 6, supporting insulators 7, and insulating rods 8. In other embodiments, single-phase or two-phase structures can also be set according to the line configuration, which will not be described in detail here, but all fall within the protection scope of this application.

[0071] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0072] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A pole-mounted circuit breaker, characterized in that, It includes a pole (1), a disconnecting switch and a line-side terminal (6), wherein the pole (1) is provided with an upper outgoing terminal (2); The disconnecting switch is located on the upper outgoing side of the pole (1). The disconnecting switch includes an isolation blade (4). The first end of the isolation blade (4) is rotatably connected to the upper outgoing end (2) and electrically connected. The upper outgoing end (2) constitutes the rotating support part of the isolation blade (4). The second end of the isolation blade (4) can swing around the rotating support part to contact and conduct or separate from the line side terminal (6).

2. The pole-mounted circuit breaker according to claim 1, characterized in that, The first end of the isolation knife (4) is rotatably connected to the upper outlet end (2) through a pivot structure (3), and the pivot structure (3) is disposed on the rotating support part.

3. The pole-mounted circuit breaker according to claim 2, characterized in that, The first end of the isolation blade (4) and the upper output terminal (2) are respectively provided with metal conductive surfaces that are in contact with each other, so that the isolation blade (4) maintains a conductive connection with the upper output terminal (2) during rotation.

4. The pole-mounted circuit breaker according to claim 1, characterized in that, The isolation blade (4) is a long strip-shaped conductive component, and the second end of the isolation blade (4) is provided with a conductive contact for making contact with the line-side terminal (6) to conduct electricity.

5. The pole-mounted circuit breaker according to claim 4, characterized in that, The isolating blade (4) has a drive hinge part (5) between the first end and the second end. The isolating switch also includes an insulating pull rod (8), the first end of which is hinged to the drive hinge part (5).

6. The pole-mounted circuit breaker according to claim 5, characterized in that, It also includes an operating shaft (12) and a transmission crank arm (10) fixed to the operating shaft (12), the second end of the insulating rod (8) being hinged to the transmission crank arm (10) to drive the isolation knife (4) to swing through the transmission crank arm (10) and the insulating rod (8) when the operating shaft (12) rotates.

7. The pole-mounted circuit breaker according to claim 6, characterized in that, It also includes a housing (11) and an operating handle (9), the operating shaft (12) being rotatably mounted on the housing (11), and the operating handle (9) being connected to the operating shaft (12).

8. The pole-mounted circuit breaker according to claim 1, characterized in that, It also includes a housing (11) and a supporting insulator (7), the supporting insulator (7) being erected on the upper part of the housing (11), and the line-side terminal (6) being disposed on the upper end of the supporting insulator (7).

9. The pole-mounted circuit breaker according to claim 8, characterized in that, The line-side terminal (6) is located on the swing path of the second end of the isolation blade (4). When the second end of the isolation blade (4) is separated from the line-side terminal (6), a visible air gap is formed between them.

10. The pole-mounted circuit breaker according to claim 1, characterized in that, The pole post (1) is provided with a vacuum interrupter and a conductor. The vacuum interrupter is electrically connected to the upper output terminal (2) through the conductor. The pole post (1) is an epoxy resin casting and sealing structure, and the outside of the pole post (1) is covered with a silicone insulating layer.

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