Outdoor pole-mounted vacuum circuit breaker

Abstract

The invention provides an outdoor pole-mounted vacuum circuit breaker, and belongs to the field of switches, the outdoor pole-mounted vacuum circuit breaker comprises a shell, three phases of solid-sealed polar poles which are the same in structure and are all installed on the shell, a first electricity taking polar pole installed on the shell and a first electricity taking power supply installed in the shell, and an integrated current sensor and a voltage dividing type voltage sensor are fixedly sealed in the solid-sealed polar poles; the partial pressure type voltage sensor is connected with a moving end conducting rod or a static end conducting rod of a vacuum arc-extinguishing chamber of the solid-sealed polar pole, and the integrated current sensor is connected with the moving end conducting rod of the vacuum arc-extinguishing chamber of the solid-sealed polar pole; the upper end of the first electricity taking pole is connected with the wire inlet end of one solid-sealed pole, the lower end of the first electricity taking pole is connected with a first electricity taking power supply, and the first electricity taking power supply is an isolated electricity taking power supply. The requirements of power supply stability, installation convenience, power utilization safety, voltage sampling precision and the like can be met during power taking.

Description

Technical Field

[0001] This invention relates to the field of switch technology, and more particularly to an outdoor pole-mounted vacuum circuit breaker. Background Technology

[0002] The ZW32 outdoor pole-mounted vacuum circuit breaker is a core protection device for medium-voltage distribution networks, and its operational stability directly affects the power supply reliability of the distribution network. Key functional components of this circuit breaker, such as its intelligent control unit, require a continuous and stable power supply to achieve intelligent operations such as remote control, fault detection, and automatic reclosing. Therefore, the performance parameters of the power supply module are crucial to ensuring the efficient and reliable operation of the ZW32 outdoor pole-mounted vacuum circuit breaker.

[0003] Currently, the industry mainly uses two methods for powering the ZW32 outdoor pole-mounted vacuum circuit breaker: inductive power from electromagnetic voltage transformers and direct power from resistive-capacitive voltage divider electronic voltage sensors. However, neither of these methods can simultaneously meet the requirements of power supply stability, ease of installation, electrical safety, and voltage sampling accuracy.

[0004] The power extraction method using electromagnetic voltage transformers involves obtaining electrical energy from the high-voltage bus through the transformer coil. The low-voltage output terminal of the transformer is electrically connected to loads such as intelligent control units to supply power to these loads. The power supply stability of this method is strongly correlated with the high-voltage bus voltage and is highly susceptible to fluctuations in the bus voltage. Under constant frequency conditions, when the high-voltage bus is at its rated operating condition, the intelligent control units and other loads can operate normally and stably. However, when under voltage conditions, the operating current of the intelligent control units and other loads will increase significantly, easily causing saturation of the transformer core. Furthermore, since the power extraction lines of the intelligent control units and other loads share the same core as the voltage transformer, abnormal core conditions can further affect the measurement accuracy of the voltage transformer.

[0005] The power supply method of the electronic voltage sensor using the resistor-capacitor voltage divider type draws power directly from the high-voltage bus through a series resistor-capacitor voltage divider circuit. The low-voltage output of the voltage divider circuit is directly connected to the load such as the intelligent control unit. Although it has advantages such as small size, low cost, strong resistance to external electromagnetic interference, and no risk of magnetic core saturation, the core components of this power supply method are mostly exposed, without a closed protective structure, and the on-site assembly process of the sensor is cumbersome, which greatly increases the workload of on-site assembly and reduces construction efficiency. It cannot achieve compact and miniaturized equipment design and is easily affected by external environmental factors. Summary of the Invention

[0006] This invention provides an outdoor pole-mounted vacuum circuit breaker to address the shortcomings of existing outdoor pole-mounted vacuum circuit breakers in that their power supply methods cannot simultaneously meet the requirements of power supply stability, ease of installation, electrical safety, and voltage sampling accuracy. The invention achieves an outdoor pole-mounted vacuum circuit breaker structure that can simultaneously meet the requirements of power supply stability, ease of installation, electrical safety, and voltage sampling accuracy when drawing power.

[0007] This invention provides an outdoor pole-mounted vacuum circuit breaker, comprising a housing, three identical solid-sealed poles mounted on the housing, an integrated current sensor, a voltage divider sensor, a first electrode post, and a first power source. The integrated current sensor and the voltage divider sensor are solid-sealed within the solid-sealed poles. The voltage divider sensor is connected to the moving or stationary conductive rod of the solid-sealed pole. The integrated current sensor is connected to the moving conductive rod of the vacuum interrupter chamber of the solid-sealed pole. The first electrode post is mounted on the housing, with its upper end connected to the input terminal of one of the solid-sealed poles. The first power source is mounted inside the housing, with its lower end connected to the first power source. The first power source is an isolated power source.

[0008] In addition, the outdoor pole-mounted vacuum circuit breaker according to the present invention may also have the following additional technical features: In some embodiments of the present invention, an aviation plug and a voltage collection PCB board are also included. The aviation plug is mounted on the side wall of the housing, and the voltage collection PCB board is mounted inside the housing. The integrated current sensor and the voltage divider voltage sensor are both connected to the voltage collection PCB board via wires. The first power source is connected to the aviation plug via wires.

[0009] In some embodiments of the present invention, a second electrode post and a second power supply are also included. The second electrode post is mounted on the housing. The upper end of the second electrode post is connected to the output end of one of the solid-sealed electrode posts. The second power supply is mounted inside the housing. The lower end of the second electrode post is connected to the second power supply. The second power supply is connected to an aviation plug through a wire. The second power supply is an isolated power supply.

[0010] In some embodiments of the present invention, a first full-bridge rectifier bridge, a first-stage voltage-dividing film capacitor, a second full-bridge rectifier bridge, and a second-stage voltage-dividing film capacitor are also included. The first power supply integrates the first full-bridge rectifier bridge and the first-stage voltage-dividing film capacitor, and the second power supply integrates the second full-bridge rectifier bridge and the second-stage voltage-dividing film capacitor.

[0011] In some embodiments of the present invention, the first electrode post includes a first insulating shell and a first voltage-dividing main capacitor, and the second electrode post includes a second insulating shell and a second voltage-dividing main capacitor. The first insulating shell is mounted on the housing, and the first voltage-dividing main capacitor is sealed inside the first insulating shell. The upper end of the first voltage-dividing main capacitor is connected to the input terminal of one of the sealed electrode posts, and the lower end of the first voltage-dividing main capacitor is connected to the first power source. The second insulating shell is mounted on the housing, and the second voltage-dividing main capacitor is sealed inside the second insulating shell. The upper end of the second voltage-dividing main capacitor is connected to the output terminal of one of the sealed electrode posts, and the lower end of the second voltage-dividing main capacitor is connected to the second power source.

[0012] In some embodiments of the present invention, the first voltage divider main capacitor includes a plurality of first capacitors connected in series from beginning to end, and the second voltage divider main capacitor includes a plurality of second capacitors connected in series from beginning to end. The first capacitor at the beginning is connected to the input terminal of the corresponding solid-sealed terminal, the first capacitor at the end is connected to the first power source, the second capacitor at the beginning is connected to the output terminal of the corresponding solid-sealed terminal, and the second capacitor at the end is connected to the second power source.

[0013] In some embodiments of the present invention, a first power-taking copper busbar and a second power-taking copper busbar are also included. The first power-taking electrode post is connected to the inlet terminal of the corresponding solid-sealed electrode post through the first power-taking copper busbar, and the second power-taking electrode post is connected to the outlet terminal of the corresponding solid-sealed electrode post through the second power-taking copper busbar.

[0014] In some embodiments of the present invention, the three-phase solid-sealed terminals are mounted on the housing in a straight line at equal intervals, and the minimum distance between two adjacent solid-sealed terminals is 210 mm.

[0015] In some embodiments of the present invention, the first electrode post, the three-phase solid-sealed electrode post, and the second electrode post are mounted on the housing in a straight line at intervals, with the three-phase solid-sealed electrode post located between the first electrode post and the second electrode post.

[0016] In some embodiments of the present invention, the minimum distance between the first electrode post and the solid-sealed electrode post at the beginning is 110 mm, and the minimum distance between the second electrode post and the solid-sealed electrode post at the end is 110 mm.

[0017] In summary, this application includes the following beneficial technical effects: by directly connecting the upper end of the first electrode post to the input end of one of the solid-sealed electrodes and the lower end to the first power source, the first electrode post can directly obtain power from the high-voltage bus and then transmit the power directly to the intelligent control unit and other loads through the first power source. This makes it less susceptible to the influence of bus voltage fluctuations, thereby making the power supply more stable while significantly reducing costs and the use of electromagnetic voltage transformers, thus reducing the probability of ferroresonance in the distribution network.

[0018] By embedding the integrated current sensor and voltage divider sensor within the solid-sealed pole, the superior insulation performance of the solid-sealed pole effectively enhances the anti-interference capability of the integrated current sensor and voltage divider sensor, ensuring sampling and detection accuracy. Furthermore, by embedding the integrated current sensor and voltage divider sensor within the solid-sealed pole, this circuit breaker reduces the need for external voltage and current transformers and other components, resulting in a more compact and rational overall structure. It also reduces on-site installation steps, significantly shortening on-site installation time and making it less susceptible to external environmental factors.

[0019] By setting up the first electrode post and the voltage divider voltage sensor separately, the voltage measurement circuit and the power supply circuit can be decoupled, which facilitates the separate optimization of heat dissipation, withstand voltage, partial discharge, etc. of the voltage measurement circuit and the power supply circuit, thereby reducing the overall manufacturing process requirements of the circuit breaker.

[0020] In summary, this circuit breaker can meet the requirements of power supply stability, ease of installation, safety, and sampling accuracy. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A first perspective view of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown schematically.

[0022] Figure 2 A second perspective view of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown schematically.

[0023] Figure 3 A third perspective view of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown schematically.

[0024] Figure 4 A schematic plan view of the solidified pole of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0025] Figure 5 A perspective view schematically illustrates a first partial structure concealing the solidified pole of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention.

[0026] Figure 6 A schematic plan view of the concealed second partial structure of the solid-sealed pole of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0027] Figure 7 A schematic front view of the first electrode post of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0028] Figure 8 A schematic cross-sectional view of the front view of the first electrode post of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0029] Figure 9 A schematic front view of the first electrode post of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0030] Figure 10 A schematic cross-sectional view of the front view of the first electrode post of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0031] Figure 11 A partial structural diagram of the first power source of an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown schematically.

[0032] Figure 12 A partial structural diagram of the second power source for an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown schematically.

[0033] Figure 13 A schematic diagram of the structure of an aviation plug for an outdoor pole-mounted vacuum circuit breaker according to some embodiments of the present invention is shown.

[0034] Figure label: 1. Housing; 11. Voltage collection PCB board; 12. Aviation plug; 13. First power supply; 131. First full-bridge rectifier bridge; 132. First stage voltage divider film capacitor; 14. Second power supply; 141. Second full-bridge rectifier bridge; 142. Second stage voltage divider film capacitor; 2. Solid-sealed terminal; 21. Integrated current sensor; 22. Voltage divider voltage sensor; 23. Phase A solid-sealed terminal; 24. Phase B solid-sealed terminal; 25. Phase C solid-sealed terminal; 26. Inlet conductor rod; 27. Outlet conductor rod; 28. First connecting copper busbar; 29. ​​Second connecting copper busbar; 3. First power supply terminal; 31. First insulating shell; 32. First capacitor; 4. Second power supply terminal; 41. Second insulating shell; 42. Second capacitor; 5. First power supply copper busbar; 6. Second power supply copper busbar; 7. Handle. Detailed Implementation

[0035] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0036] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” used herein may also refer to the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a specific order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0037] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0038] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may also be rotated 90 degrees or in other orientations, and the spatial relative descriptors used in the text will be interpreted accordingly.

[0039] like Figures 1 to 13 As shown, according to an embodiment of the first aspect of the present invention, an outdoor pole-mounted vacuum circuit breaker is provided, comprising a housing 1, three identical solid-sealed poles 2 all mounted on the housing 1, an integrated current sensor 21, a voltage divider 22, a first power-taking pole 3, and a first power supply 13. The integrated current sensor 21 and the voltage divider 22 are solid-sealed inside the solid-sealed pole 2. The voltage divider 22 is connected to the moving end conductive rod or the stationary end conductive rod of the vacuum interrupter of the solid-sealed pole 2. The integrated current sensor 21 is connected to the moving end conductive rod of the vacuum interrupter of the solid-sealed pole 2. The first power-taking pole 3 is mounted on the housing 1, and the upper end of the first power-taking pole 3 is connected to the input end of one of the solid-sealed poles 2. The first power supply 13 is mounted inside the housing 1, and the lower end of the first power-taking pole 3 is connected to the first power supply 13. The first power supply 13 is an isolated power supply.

[0040] In the above embodiments, it should be noted that the solid-sealed pole 2 includes an insulating cylinder integrally cast with epoxy resin, a vacuum interrupter chamber solidified inside the insulating cylinder, an insulating pull rod connected to the moving contact system of the vacuum interrupter chamber, an inlet conductive rod 26 connected to the stationary contact system of the vacuum interrupter chamber, and an outlet conductive rod 27 connected to the moving contact system of the vacuum interrupter chamber via a flexible connection. The solid-sealed pole 2 contains an integrated current sensor 21 and a voltage divider voltage sensor 22, which means that the integrated current sensor 21 and the voltage divider voltage sensor 22 are solidified inside the insulating cylinder. The inlet end of the solid-sealed pole 2 is connected to the high-voltage busbar through the inlet conductive rod 26. The conductive main circuit of the circuit breaker is cast inside the insulating cylinder of the solid-sealed pole 2. The first power supply 13 is used to provide power to the load. The first power supply 13 adopts an isolated AC-DC converter topology to form an isolated power supply.

[0041] The aforementioned moving contact system includes a moving contact and a moving end conductive rod integrally formed with the moving contact; the stationary contact system includes a stationary contact and a stationary end conductive rod integrally formed with the stationary contact.

[0042] In addition, it also includes a handle 7, with a handle 7 connected to each end of the housing 1 via a pivot for easy handling.

[0043] The technical effects achieved by the above embodiments are as follows: by directly connecting the upper end of the first electrode post 3 to the input end of one of the solid-sealed electrode posts 2 and the lower end to the first power source 13, the first electrode post 3 can directly obtain power from the high-voltage bus and then transmit the power directly to the intelligent control unit and other loads through the first power source 13. It is not easily affected by bus voltage fluctuations, thus making the power supply more stable and significantly reducing costs. At the same time, the use of electromagnetic voltage transformers reduces the probability of ferroresonance in the distribution network.

[0044] By embedding the integrated current sensor 21 and the voltage divider sensor 22 within the solid-enclosed pole 2, the superior insulation performance of the solid-enclosed pole 2 effectively enhances the anti-interference capabilities of the integrated current sensor 21 and the voltage divider sensor 22, ensuring sampling and detection accuracy. Furthermore, by embedding the integrated current sensor 21 and the voltage divider sensor 22 within the solid-enclosed pole 2, the circuit breaker reduces the need for external voltage and current transformers and other components, resulting in a more compact and rational overall structure. This also reduces on-site installation steps, significantly shortening on-site installation time and making it less susceptible to external environmental factors.

[0045] By setting the first electrode post 3 and the voltage divider voltage sensor 22 separately, the voltage measurement circuit and the power supply circuit can be decoupled, which facilitates the separate optimization of heat dissipation, withstand voltage, partial discharge, etc. of the voltage measurement circuit and the power supply circuit, thereby reducing the overall manufacturing process requirements of the circuit breaker.

[0046] In summary, this circuit breaker can meet the requirements of power supply stability, ease of installation, safety, and sampling accuracy.

[0047] Optional, such as Figure 2 , Figure 3 as well as Figure 13 As shown, it also includes an aviation plug 12 and a voltage collection PCB board 11. The aviation plug 12 is installed on the side wall of the housing 1, and the voltage collection PCB board 11 is installed inside the housing 1. The integrated current sensor 21 and the voltage divider voltage sensor 22 are both connected to the voltage collection PCB board 11 by wires. The first power supply 13 is connected to the aviation plug 12 by wires.

[0048] In the above optional embodiments, it should be noted that the aviation plug 12 is installed on the side wall of the housing 1 by means of snap-fit ​​or adhesive, and the voltage collection PCB board 11 is installed inside the housing 1 by means of snap-fit, adhesive or screw.

[0049] The advantages of the above optional embodiments are as follows: by setting the voltage collection PCB board, the detection signals of the integrated current sensor 21 and the voltage divider voltage sensor 22 can be integrated, thereby simplifying the wiring structure inside the housing 1, reducing signal interference caused by messy wire arrangement, and improving the stability and accuracy of detection data transmission.

[0050] Optional, such as Figures 1 to 3 as well as Figures 7 to 10 As shown, it also includes a second electrode post 4 and a second power supply 14. The second electrode post 4 is mounted on the housing 1. The upper end of the second electrode post 4 is connected to the output terminal of one of the solid-sealed electrode posts 2. The second power supply 14 is mounted inside the housing 1. The lower end of the second electrode post 4 is connected to the second power supply 14. The second power supply 14 is connected to the aviation plug 12 through a wire. The second power supply 14 is an isolated power supply.

[0051] In the above optional embodiments, it should be noted that the first power source 13 and the second power source 14 are respectively installed at both ends of the housing 1 by bolts and are located inside the housing 1. The first power source 13 and the second power source 14 are both connected to the voltage collection PCB board 11 by wires. The voltage collection PCB board 11 is installed in the middle of the housing 1 by bolts and is located inside the housing 1. The second power source 14 is used to provide power to the load. The second power source 14 adopts an isolated AC-DC converter topology to form an isolated power source.

[0052] The advantages of the above optional embodiments are as follows: by setting the second electrode post 4, it can form a one-for-one standby configuration with the first electrode post 3. When the incoming end of the solid-sealed electrode post 2 becomes the outgoing end and the outgoing end becomes the incoming end, the second electrode post 4 can obtain electrical energy to supply power to other loads. When the circuit breaker trips, either the first electrode post 3 or the second electrode post 4 can still obtain electrical energy from the bus to supply power to the load, thereby ensuring the reliability of power supply.

[0053] Optional, such as Figure 3 , Figure 11 as well as Figure 12 As shown, it also includes a first full-bridge rectifier bridge 131, a first-stage voltage divider film capacitor 132, a second full-bridge rectifier bridge 141, and a second-stage voltage divider film capacitor 142. The first power supply 13 integrates the first full-bridge rectifier bridge 131 and the first-stage voltage divider film capacitor 132, and the second power supply 14 integrates the second full-bridge rectifier bridge 141 and the second-stage voltage divider film capacitor 142.

[0054] In the above optional embodiments, it should be noted that the structure of the first power supply 13, except for the first full-bridge rectifier bridge 131 and the first primary voltage divider film capacitor 132, is a conventional structure, and the connection method of each component of the first power supply 13 is a conventional connection method, which will not be discussed in detail here.

[0055] Except for the second full-bridge rectifier bridge 141 and the second stage voltage divider film capacitor 142, the structure of the second power supply 14 is the existing structure. The connection method of each component of the second power supply 14 is the existing connection method, which will not be discussed in detail here.

[0056] Both the first-stage voltage divider film capacitor 132 and the second-stage voltage divider film capacitor 142 are composed of multiple rectangular block-shaped capacitors connected in series.

[0057] The advantages of the above optional embodiments are as follows: by setting the first-stage voltage divider film capacitor 132, the high voltage from the first electrode post 3 can be converted into a low voltage. By setting the first full-bridge rectifier bridge 131, the AC voltage of the first-stage voltage divider film capacitor 132 can be converted into a DC voltage, thereby enabling the first power supply 13 to achieve effective electrical isolation at the topology level, ensuring the stability, reliability and safety of power supply to other load components.

[0058] The high voltage from the second voltage-dividing film capacitor 142 can be converted to a low voltage by setting the second voltage-dividing post 4. The AC voltage from the second voltage-dividing film capacitor 142 can be converted to DC voltage by setting the second full-bridge rectifier bridge 141, so that the second power supply 14 can achieve effective electrical isolation at the topology level, ensuring the stability, reliability and safety of power supply to other load components.

[0059] Optional, such as Figures 7 to 10 As shown, the first electrode post 3 includes a first insulating shell 31 and a first voltage-dividing main capacitor, and the second electrode post 4 includes a second insulating shell 41 and a second voltage-dividing main capacitor. The first insulating shell 31 is mounted on the housing 1, and the first voltage-dividing main capacitor is sealed inside the first insulating shell 31. The upper end of the first voltage-dividing main capacitor is connected to the input terminal of one of the sealed electrode posts 2, and the lower end of the first voltage-dividing main capacitor is connected to the first power source 13. The second insulating shell 41 is mounted on the housing 1, and the second voltage-dividing main capacitor is sealed inside the second insulating shell 41. The upper end of the second voltage-dividing main capacitor is connected to the output terminal of one of the sealed electrode posts 2, and the lower end of the second voltage-dividing main capacitor is connected to the second power source 14.

[0060] In the above optional embodiments, it should be noted that the first insulating shell 31 is made of epoxy resin and the outer periphery of the first insulating shell 31 is coated with silicone rubber; the second insulating shell 41 is made of epoxy resin and the outer periphery of the second insulating shell 41 is coated with silicone rubber.

[0061] Optional, such as Figures 7 to 10 As shown, the first voltage divider main capacitor includes multiple first capacitors 32 connected in series from beginning to end, and the second voltage divider main capacitor includes multiple second capacitors 42 connected in series from beginning to end. The first capacitor 32 at the beginning is connected to the input terminal of the corresponding solid-sealed terminal 2, the first capacitor 32 at the end is connected to the first power supply 13, the second capacitor 42 at the beginning is connected to the output terminal of the corresponding solid-sealed terminal 2, and the second capacitor 42 at the end is connected to the second power supply 14.

[0062] In the above optional embodiments, it should be noted that the second capacitor 42 located at the first end is connected to the output terminal of the corresponding solid-sealed post 2 by a wire, and the first capacitor 32 located at the tail end is connected to the second power source 14 by a wire.

[0063] The advantages of the above optional embodiments are: the configuration of forming a large capacitor by connecting multiple capacitors in series is lower in cost than a single large capacitor; therefore, the configuration of the first voltage divider main capacitor including multiple first capacitors 32 connected in series from beginning to end and the second voltage divider main capacitor including multiple second capacitors 42 connected in series from beginning to end can effectively reduce costs.

[0064] Optional, such as Figures 1 to 3 As shown, it also includes a first power-taking copper busbar 5 and a second power-taking copper busbar 6. The first power-taking electrode post 3 is connected to the inlet terminal of the corresponding solid-sealed electrode post 2 through the first power-taking copper busbar 5, and the second power-taking electrode post 4 is connected to the outlet terminal of the corresponding solid-sealed electrode post 2 through the second power-taking copper busbar 6.

[0065] In the above optional embodiments, it should be noted that the first connecting copper busbar 28 is connected to the inlet conductive rod 26 of the solidified pole 2 by bolts, the second connecting copper busbar 29 is connected to the outlet conductive rod 27 of the solidified pole 2 by bolts, the first electrode post 3 is connected to the first connecting copper busbar 28 of the corresponding solidified pole 2 by the first power taking copper busbar 5, and the second electrode post 4 is connected to the second connecting copper busbar 29 of the corresponding solidified pole 2 by the second power taking copper busbar 6.

[0066] Optional, such as Figures 1 to 3 As shown, the three-phase solid-sealed terminals 2 are installed on the housing 1 in a straight line at equal intervals, and the minimum distance between two adjacent solid-sealed terminals 2 is 210mm.

[0067] In the above optional embodiments, it should be noted that the three-phase solid-sealed terminals 2 are A-phase solid-sealed terminals 23, B-phase solid-sealed terminals 24 and C-phase solid-sealed terminals 25. A-phase solid-sealed terminals 23, B-phase solid-sealed terminals 24 and C-phase solid-sealed terminals 25 are all mounted on the housing 1. An integrated current sensor 21 and a voltage divider type voltage sensor 22 are solid-sealed inside A-phase solid-sealed terminals 23, B-phase solid-sealed terminals 24 and C-phase solid-sealed terminals 25. The minimum spacing of 210mm between two adjacent phase solid-sealed terminals 2 here means that the phase spacing between A-phase solid-sealed terminals 23 and B-phase solid-sealed terminals 24 and the phase spacing between B-phase solid-sealed terminals 24 and C-phase solid-sealed terminals 25 are both 210mm.

[0068] The advantages of the above optional embodiments are: by setting the minimum spacing of 210mm between adjacent two-phase solid-sealed poles 2, the circuit breaker has better electrical insulation and safety reliability.

[0069] Optional, such as Figure 2 and Figure 3 As shown, the first electrode post 3, the three-phase solid-sealed electrode post 2, and the second electrode post 4 are installed on the housing 1 in a straight line at intervals, with the three-phase solid-sealed electrode post 2 located between the first electrode post 3 and the second electrode post 4.

[0070] Optional, such as Figures 1 to 3 As shown, the minimum distance between the first electrode post 3 and the solid-sealed electrode post 2 located at the beginning is 110mm, and the minimum distance between the second electrode post 4 and the solid-sealed electrode post 2 located at the end is 110mm.

[0071] In the above optional embodiments, it should be noted that the minimum distance of 110mm between the first electrode post 3 and the solid-sealed electrode post 2 located at the first end refers to the minimum distance of 110mm between the first electrode post 3 and the A-phase solid-sealed electrode post 23; the minimum distance of 110mm between the second electrode post 4 and the solid-sealed electrode post 2 located at the tail end refers to the minimum distance of 110mm between the second electrode post 4 and the C-phase solid-sealed electrode post 25.

[0072] Specifically, the A-phase solid-sealed terminal 23, the B-phase solid-sealed terminal 24, and the C-phase solid-sealed terminal 25 are all fixed to the housing 1 by an M10×30 socket head cap screw assembly. The first electrode post 3 and the second electrode post 4 are both fixed to the housing 1 by an M6×20 socket head cap screw assembly. The first power-taking copper busbar 5 and the second power-taking copper busbar 6 are both 12mm chrome-plated copper busbars. The first power-taking copper busbar 5 is connected to the first electrode post 3 by an M8×35 stainless steel external hexagonal bolt assembly. The first power-taking copper busbar 5 is connected to the first connecting copper busbar 28 by an M8×35 stainless steel external hexagonal bolt assembly. The second power-taking copper busbar 6 and the second power-taking electrode post 4 are connected by an M8×35 stainless steel hexagonal bolt assembly. The second power-taking copper busbar 6 and the second connecting copper busbar 29 are connected by an M8×35 stainless steel hexagonal bolt assembly. The bolt assembly is composed of an internal hexagonal bolt, a flat washer, and a spring washer.

[0073] The advantages of the above optional embodiments are that the minimum spacing of 110mm ensures both electrical insulation performance and structural compactness.

[0074] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. An outdoor pole-mounted vacuum circuit breaker, characterized in that, The device includes a housing (1), three identical solid-sealed terminals (2) mounted on the housing (1), an integrated current sensor (21), a voltage divider sensor (22), a first electrode post (3), and a first power source (13). The integrated current sensor (21) and the voltage divider sensor (22) are solid-sealed inside the solid-sealed terminal post (2). The voltage divider sensor (22) is connected to the moving end conductive rod or the stationary end conductive rod of the vacuum interrupter chamber of the solid-sealed terminal post (2). The integrated current sensor (21) is connected to the moving end conductive rod of the vacuum interrupter of the solid-sealed pole (2); the first electrode post (3) is installed on the housing (1), the upper end of the first electrode post (3) is connected to the inlet end of one of the solid-sealed poles (2), the first power supply (13) is installed inside the housing (1), the lower end of the first electrode post (3) is connected to the first power supply (13), and the first power supply (13) is an isolated power supply.

2. The outdoor pole-mounted vacuum circuit breaker according to claim 1, characterized in that, It also includes an aviation plug (12) and a voltage collection PCB board (11). The aviation plug (12) is installed on the side wall of the housing (1). The voltage collection PCB board (11) is installed inside the housing (1). The integrated current sensor (21) and the voltage divider voltage sensor (22) are both connected to the voltage collection PCB board (11) by wires. The first power source (13) is connected to the aviation plug (12) by wires.

3. The outdoor pole-mounted vacuum circuit breaker according to claim 2, characterized in that, It also includes a second electrode post (4) and a second power supply (14). The second electrode post (4) is mounted on the housing (1). The upper end of the second electrode post (4) is connected to the output end of one of the solid-sealed electrode posts (2). The second power supply (14) is mounted inside the housing (1). The lower end of the second electrode post (4) is connected to the second power supply (14). The second power supply (14) is connected to the aviation plug (12) through a wire. The second power supply (14) is an isolated power supply.

4. The outdoor pole-mounted vacuum circuit breaker according to claim 3, characterized in that, It also includes a first full-bridge rectifier bridge (131), a first-stage voltage divider film capacitor (132), a second full-bridge rectifier bridge (141) and a second-stage voltage divider film capacitor (142). The first power supply (13) integrates the first full-bridge rectifier bridge (131) and the first-stage voltage divider film capacitor (132), and the second power supply (14) integrates the second full-bridge rectifier bridge (141) and the second-stage voltage divider film capacitor (142).

5. The outdoor pole-mounted vacuum circuit breaker according to claim 3, characterized in that, The first electrode post (3) includes a first insulating shell (31) and a first voltage-dividing main capacitor. The second electrode post (4) includes a second insulating shell (41) and a second voltage-dividing main capacitor. The first insulating shell (31) is mounted on the housing (1). The first voltage-dividing main capacitor is sealed inside the first insulating shell (31). The upper end of the first voltage-dividing main capacitor is connected to the inlet end of one of the sealed electrode posts (2). The lower end of the first voltage-dividing main capacitor is connected to the first power source (13). The second insulating shell (41) is mounted on the housing (1). The second voltage-dividing main capacitor is sealed inside the second insulating shell (41). The upper end of the second voltage-dividing main capacitor is connected to the outlet end of one of the sealed electrode posts (2). The lower end of the second voltage-dividing main capacitor is connected to the second power source (14).

6. The outdoor pole-mounted vacuum circuit breaker according to claim 5, characterized in that, The first voltage divider main capacitor includes a plurality of first capacitors (32) connected in series from beginning to end. The second voltage divider main capacitor includes a plurality of second capacitors (42) connected in series from beginning to end. The first capacitor (32) at the beginning is connected to the input terminal of the corresponding solid-sealed terminal (2). The first capacitor (32) at the end is connected to the first power source (13). The second capacitor (42) at the beginning is connected to the output terminal of the corresponding solid-sealed terminal (2). The second capacitor (42) at the end is connected to the second power source (14).

7. The outdoor pole-mounted vacuum circuit breaker according to claim 3, characterized in that, It also includes a first power-taking copper busbar (5) and a second power-taking copper busbar (6). The first power-taking electrode post (3) is connected to the inlet end of the corresponding solid-sealed electrode post (2) through the first power-taking copper busbar (5), and the second power-taking electrode post (4) is connected to the outlet end of the corresponding solid-sealed electrode post (2) through the second power-taking copper busbar (6).

8. The outdoor pole-mounted vacuum circuit breaker according to claim 1, characterized in that, The three-phase solid-sealed poles (2) are installed on the housing (1) in a straight line at equal intervals, with the minimum distance between two adjacent solid-sealed poles (2) being 210 mm.

9. The outdoor pole-mounted vacuum circuit breaker according to claim 3, characterized in that, The first electrode post (3), the three-phase solid-sealed electrode post (2) and the second electrode post (4) are installed on the housing (1) in a straight line at intervals, and the three-phase solid-sealed electrode post (2) is located between the first electrode post (3) and the second electrode post (4).

10. The outdoor pole-mounted vacuum circuit breaker according to claim 9, characterized in that, The minimum distance between the first electrode post (3) and the solid-sealed electrode post (2) located at the beginning is 110 mm, and the minimum distance between the second electrode post (4) and the solid-sealed electrode post (2) located at the end is 110 mm.

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