A circuit breaker performance enhancement device

Abstract

The utility model discloses a kind of circuit breaker performance reinforcement device, it is related to circuit breaker technical field, specifically a kind of circuit breaker performance reinforcement device, including bottom plate, zero sequence current transformer, multiple power supply side components, multiple moving knife components, multiple load side components;The utility model has optimized design to moving knife component, increased heat conduction piece and overtravel spring and the structure such as etc..Heat conduction piece is made of high thermal conductivity metal material, can quickly conduct heat generated in the through-flow process of moving knife to go out, avoid moving knife local overheating.Moving knife will generate a lot of heat in the closing and breaking process, especially in the case of frequent operation, heat accumulation can cause the mechanical properties and electrical properties of moving knife to decline.Through setting heat conduction piece, the heat generated by moving knife can be directly transmitted to heat conduction piece through metal contact, and heat conduction piece quickly disperses heat through its good heat conduction performance, thereby effectively reducing the temperature of moving knife, maintaining its good performance.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker performance enhancement device. Background Technology

[0002] In the field of circuit breaker technology, there are many problems in the existing technology that urgently need to be solved. For example, patent application number 202321785376.9 discloses an arc-isolating structure that can improve breaking capacity. It integrates the phase conductors by setting up a rectangular cover and isolation components, and uses insulating material to wrap the phase conductors and the coils on them to block the phase-to-phase voltage generated by short circuits, thereby protecting the internal components and circuit boards of the circuit breaker. However, this existing technology still has some shortcomings.

[0003] Firstly, although existing technologies isolate phase-to-phase arcs using isolation components and integrated instrument transformers, in practical applications, the arc energy generated by the circuit breaker during a short circuit is still substantial. Isolation components and instrument transformers alone cannot completely prevent damage to the internal components of the circuit breaker from the arc. Especially under complex operating conditions of high voltage and high current, the arc may break down the isolation components or instrument transformers, thereby damaging the circuit board and other critical components, shortening the circuit breaker's lifespan, and even causing safety accidents.

[0004] Secondly, the design of the moving blade assembly in existing technologies is relatively simple, lacking effective heat dissipation and buffering mechanisms. The moving blade generates a significant amount of heat during closing and opening, especially under frequent operation. Heat accumulation can lead to localized overheating of the moving blade, affecting its mechanical and electrical performance. Furthermore, the moving blade is subjected to considerable impact force during opening; without effective buffering measures, this can cause mechanical damage to the moving blade, reducing the reliability of the circuit breaker.

[0005] To address the problems existing in the prior art, this utility model proposes a circuit breaker performance enhancement device. It aims to improve the breaking capacity, service life and safety of the circuit breaker by optimizing the structure of the moving blade assembly, load-side assembly and other components, thereby solving the problems of poor arc isolation effect and insufficient heat dissipation and buffering of the moving blade in the prior art. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a circuit breaker performance enhancement device, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a circuit breaker performance enhancement device, comprising a base plate, a zero-sequence current transformer, multiple power supply side components, multiple moving blade components, and multiple load side components. The power supply side components are arranged sequentially and fixedly mounted on the base plate. The moving blade components are also arranged sequentially and fixedly mounted on the base plate. The load side components are located between the power supply side components and the load side components, and when closed, they form a conductive path between the power supply side components and the load side components. Each load side component includes a first connecting plate. The zero-sequence current transformer is mounted on the first connecting plate of each load side component and is fixedly mounted to the base plate. An arc-blocking component is wrapped around and fixedly mounted on the first connecting plate. Each moving blade component includes a copper clip, a phase conductor, and a heat-conducting component. The copper clip is fixedly mounted on the base plate, the heat-conducting component is fixedly mounted inside the copper clip, and the phase conductor is fixedly mounted on the heat-conducting component, with the phase conductor abutting against the copper clip. The phase conductor is fixedly connected to the first connecting plate.

[0008] Optionally, the moving blade assembly further includes a moving blade and a pin. The upper part of the copper clip and the heat-conducting component forms an upward arc-shaped protrusion. One end of the moving blade is inserted into the copper clip and the heat-conducting component respectively. The pin passes through the copper clip, the moving blade, and the heat-conducting component in sequence. The moving blade is rotatably mounted to the copper clip and the heat-conducting component through the pin.

[0009] Optionally, an isolation blade sleeve is installed on the moving blade assembly. The isolation blade sleeve has an installation groove and a spring groove inside. The isolation blade sleeve has a blade hole. The pin is located in the installation groove and is rotatably installed with the isolation blade sleeve. The moving blade passes through the blade hole.

[0010] Optionally, a fixing block is fixedly installed on the side wall of the moving blade, and an overtravel spring is fixedly installed on the fixing block. The end of the overtravel spring away from the fixing block is inserted into the spring groove of the isolation blade sleeve.

[0011] Optionally, the power supply side assembly includes a power supply side conductive plate and a power supply side terminal. The power supply side conductive plate is fixedly mounted on the base plate, and the power supply side terminal is threaded onto the power supply side conductive plate. After the moving blade rotates partially around the pin shaft, the end of the moving blade abuts against the power supply side conductive plate.

[0012] Optionally, the load-side assembly further includes a load-side terminal, a load-side conductive plate, and a second connecting plate. The load-side conductive plate is fixedly mounted on the base plate, and the load-side terminal is threaded onto the load-side conductive plate. One end of the second connecting plate is fixedly connected to the first connecting plate, and the other end of the second connecting plate is fixedly connected to the phase conductor.

[0013] Optionally, the arc-blocking component is made of arc-resistant insulating material.

[0014] Optionally, the heat-conducting element is made of a high thermal conductivity metal material.

[0015] This utility model provides a circuit breaker performance enhancement device, which has the following beneficial effects: 1. This utility model effectively blocks phase-to-phase voltage generated during a short circuit by incorporating an arc-blocking component in the load-side assembly, protecting the internal components and circuit board of the circuit breaker. Compared with existing technologies, the arc-blocking component of this utility model not only covers the first connecting plate but also enhances the arc isolation effect through optimized design. When a short circuit occurs in the circuit breaker, the arc first contacts the arc-blocking component. Due to the arc-resistant insulation characteristics of the arc-blocking component, it effectively prevents the arc from breaking down the component, thereby avoiding damage to the circuit board and other critical components. Furthermore, this utility model further improves the arc isolation effect by optimizing the installation position of the zero-sequence current transformer, enabling it to work synergistically with the arc-blocking component. This dual protection mechanism significantly improves the safety of the circuit breaker during short circuits, extends its service life, and reduces maintenance costs.

[0016] 2. This utility model optimizes the design of the moving blade assembly by adding a heat-conducting component and an overtravel spring. The heat-conducting component is made of a high thermal conductivity metal material, which can quickly conduct away the heat generated by the moving blade during the flow process, preventing local overheating of the moving blade. The moving blade generates a large amount of heat during closing and opening, especially under frequent operation, and heat accumulation may lead to a decline in the mechanical and electrical performance of the moving blade. By setting up the heat-conducting component, the heat generated by the moving blade can be directly transferred to the heat-conducting component through metal contact. The heat-conducting component then quickly disperses the heat through its excellent thermal conductivity, thereby effectively reducing the temperature of the moving blade and maintaining its good performance. In addition, this utility model also sets up an overtravel spring in the moving blade assembly. One end of the overtravel spring is fixed to the side wall of the moving blade, and the other end is inserted into the spring groove of the isolation blade sleeve. When the moving blade breaks, the overtravel spring can provide a buffering effect, absorbing the impact force on the moving blade and reducing mechanical damage to the moving blade. This buffering mechanism not only improves the service life of the moving blades, but also enhances the overall reliability of the circuit breaker, enabling it to operate stably under complex conditions of high voltage and high current. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the zero-sequence current transformer in this utility model; Figure 3 This is a three-dimensional structural diagram of the first connecting plate in this utility model; Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle; Figure 5 This is a top view of the structure of this utility model; Figure 6 This is a three-dimensional structural diagram of the isolation blade sleeve in this utility model; Figure 7 This is a three-dimensional structural diagram of the copper clip in this utility model.

[0019] In the diagram: 1. Base plate; 2. Side plate; 3. Load-side terminal; 4. Load-side conductive plate; 5. First connecting plate; 6. Arc isolation component; 7. Zero-sequence current transformer; 8. Second connecting plate; 9. Phase conductor; 10. Heat-conducting component; 11. Copper clip; 12. Overtravel spring; 13. Moving knife; 14. Isolation knife sleeve; 1401. Knife hole; 1402. Spring groove; 15. Power supply side conductive plate; 16. Power supply side terminal; 17. Pin; 18. Fixing block. Detailed Implementation

[0020] The technical solution of this utility model will now be clearly and completely described in conjunction with the accompanying drawings. In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying anything.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0022] Please see Figures 1 to 7 This utility model provides a technical solution: a circuit breaker performance enhancement device, comprising a base plate 1, a zero-sequence current transformer 7, multiple power supply side components, multiple moving blade components, and multiple load side components. Side plates 2 are fixedly installed around the base plate 1. The power supply side components are arranged sequentially and fixedly installed on the base plate 1, the moving blade components are arranged sequentially and fixedly installed on the base plate 1, and the load side components are arranged sequentially and fixedly installed on the base plate 1.

[0023] The moving blade assembly is located between the power supply side assembly and the load side assembly. After the moving blade assembly is closed, it forms a conductive path between the power supply side assembly and the load side assembly.

[0024] The device uses a base plate 1 as its core supporting structure, with side plates 2 forming a stable protective space. Through a modular integrated layout, the power supply side components, moving blade assembly, and load side components are systematically mounted on the base plate 1. A zero-sequence current transformer 7 works in conjunction to achieve precise monitoring. The moving blade assembly, as the core switching hub, is located between the power supply and load side components. When closed, it establishes a reliable conductive path, ensuring efficient power transmission. The overall structure optimizes the current path, enhances installation stability, and improves the circuit breaker's switching response accuracy and operational reliability.

[0025] The load-side assembly includes a first connecting plate 5. A zero-sequence current transformer 7 is mounted on the first connecting plate 5 in each load-side assembly, and the zero-sequence current transformer 7 is fixedly installed to the base plate 1. An arc-damping component 6 is wrapped around and fixedly installed on the first connecting plate 5.

[0026] The load-side component uses the first connecting plate 5 as its conductive core, with the zero-sequence current transformer 7 mounted on it and fixed to the base plate 1 for precise current monitoring. The first connecting plate 5 is covered with an arc-isolating component 6 to form a reliable arc isolation barrier, which not only ensures stable current transmission but also significantly improves the circuit breaker's operational safety and fault response accuracy through dual protection of arc constraint and leakage current monitoring.

[0027] The moving blade assembly includes a copper clip 11, a phase conductor 9, and a heat-conducting component 10. The copper clip 11 is fixedly mounted on the base plate 1, the heat-conducting component 10 is fixedly mounted inside the copper clip 11, and the phase conductor 9 is fixedly mounted on the heat-conducting component 10, with the phase conductor 9 abutting against the copper clip 11. The phase conductor 9 is fixedly connected to the first connecting plate 5.

[0028] The moving blade assembly is fixed to the base plate 1 using a copper clip 11 as the mounting base. The heat-conducting component 10 is embedded in it to form an efficient heat conduction path. The phase conductor 9 abuts against the copper clip 11 (rigid connection), forming a double conductivity guarantee. The phase conductor 9 connects to the first connecting plate 5 to achieve stable current transmission. The heat conduction and conductivity are optimized in synergy, improving the reliability and heat load capacity of the assembly.

[0029] Specifically, the moving blade assembly also includes a moving blade 13, a pin 17, and the upper part of the copper clip 11 and the heat-conducting component 10 forms an upward arc-shaped protrusion. One end of the moving blade 13 is inserted into the copper clip 11 and the heat-conducting component 10 respectively. The pin 17 passes through the copper clip 11, the moving blade 13 and the heat-conducting component 10 in sequence. The moving blade 13 is rotatably mounted to the copper clip 11 and the heat-conducting component 10 through the pin 17.

[0030] The moving blade assembly features enhanced performance through structural optimization. The copper clip 11 and the heat-conducting component 10 have upward-curving protrusions on their upper parts, providing a mounting reference for the moving blade 13. One end of the moving blade 13 is precisely inserted between the two components. A pin 17 passes sequentially through the copper clip 11, the moving blade 13, and the heat-conducting component 10, ensuring stable rotation and assembly of the moving blade 13. This guarantees flexible and precise switching action, improving the response efficiency and conductivity stability of current switching. Simultaneously, an effective rigid connection is achieved between the three components, enhancing conductivity.

[0031] More specifically, an isolation sleeve 14 is installed on the moving blade assembly. The isolation sleeve 14 has an internal mounting groove and a spring groove 1402. The isolation sleeve 14 has a blade hole 1401. The pin 17 is located in the mounting groove and is rotatably mounted with the isolation sleeve 14. The moving blade 13 passes through the blade hole 1401. A fixing block 18 is fixedly installed on the side wall of the moving blade 13. An overtravel spring 12 is fixedly installed on the fixing block 18. The end of the overtravel spring 12 away from the fixing block 18 is inserted into the spring groove 1402 of the isolation sleeve 14.

[0032] The moving blade assembly incorporates an isolation sleeve 14 to form an integrated protective structure, which includes a mounting groove, a spring groove 1402, and a through-hole 1401. A pin 17 is fitted into the mounting groove for rotational adaptation, and the moving blade 13 passes through the through-hole 1401 to ensure precise operation. A fixing block 18 of the moving blade 13 securely mounts an overtravel spring 12, with the other end of the spring inserted into the spring groove 1402. This forms an arc isolation barrier and provides elastic pressure and cushioning, enhancing the contact reliability and operational stability of the moving blade.

[0033] More specifically, the power supply side assembly includes a power supply side conductive plate 15 and a power supply side terminal 16. The power supply side conductive plate 15 is fixedly mounted on the base plate 1, and the power supply side terminal 16 is threaded onto the power supply side conductive plate 15. After the moving blade 13 rotates partially around the pin 17, the end of the moving blade 13 abuts against the power supply side conductive plate 15.

[0034] The power supply side assembly is fixed to the base plate 1 with the power supply side conductive plate 15 as the core, and the power supply side terminals 16 are reliably connected by threaded assembly. The moving knife 13, which serves as the switching hub, rotates precisely around the pin 17, and its end is tightly abutted against the power supply side conductive plate 15 to form a stable conductive path, ensuring efficient power transmission and enhancing the accuracy and reliability of the circuit breaker's switching response.

[0035] Specifically, the load-side assembly also includes a load-side terminal 3, a load-side conductive plate 4, and a second connecting plate 8. The load-side conductive plate 4 is fixedly mounted on the base plate 1, and the load-side terminal 3 is threaded onto the load-side conductive plate 4. One end of the second connecting plate 8 is fixedly connected to the first connecting plate 5, and the other end of the second connecting plate 8 is fixedly connected to the phase conductor 9.

[0036] The load-side assembly is fixed to the base plate 1 with the load-side conductive plate 4 as the core, and the load-side terminals 3 are threaded together to ensure stable wiring. The second connecting plate 8 forms a key conductive bridge, with one end fixed to the first connecting plate 5 and the other end connected to the phase conductor 9, forming a complete conductive link to ensure efficient transmission of electrical energy from the moving blade assembly to the load and enhance the stability and reliability of current conduction.

[0037] Specifically, the arc-blocking component 6 is made of arc-resistant insulating material. The arc-blocking component 6 is made of arc-resistant plastic, but may also be made of ceramic material. An arc-extinguishing grid is embedded inside the arc-blocking component 6 to enhance the arc-extinguishing effect.

[0038] Among them, the arc isolation component 6, as a core arc protection component, adopts a diversified selection of arc-resistant insulation materials, covering high-performance materials such as arc-resistant plastics and ceramics, to build a solid insulation barrier. Its internal embedded integrated arc-extinguishing grid enhances the arc-extinguishing efficiency through the dual effects of physical segmentation and cooling, effectively suppressing arc propagation, providing reliable protection for circuit breaking, and significantly improving the operational safety of the circuit breaker.

[0039] Specifically, the heat-conducting component 10 is made of a high thermal conductivity metal material. The heat-conducting component 10 may be made of, but is not limited to, one of the following materials: pure copper, aluminum alloy, etc. Copper has a high thermal conductivity (approximately 401 W / (m·K)), excellent electrical and thermal conductivity, and is suitable for high-current circuit breakers; aluminum alloy has a thermal conductivity of approximately 237 W / (m·K), is lightweight and low-cost, and is commonly used in medium and low-voltage conventional circuit breakers. The heat-conducting component 10 is rigidly connected to the moving blade 13 via a pin 17. The Joule heat generated when current flows through the moving blade 13 is directly transferred to the heat-conducting component 10 through metal-to-metal contact, quickly dissipating heat and preventing localized overheating of the moving blade 13. (Reference) Figure 7 The heat-conducting component 10 has a hollowed-out wall design to facilitate heat dissipation.

[0040] The heat-conducting component 10 is made of high thermal conductivity metals such as copper (401W / (m·K)) and aluminum alloy (237W / (m·K)) to meet the requirements of different circuit breakers. Its pin shaft 17 is rigidly connected to the moving blade 13. The Joule heat of the moving blade 13 is directly conducted to the heat-conducting component 10 through the metal contact. The hollow design of the wall accelerates heat dissipation, quickly and evenly dissipates heat energy, avoids local overheating of the moving blade 13, and ensures stable operation under high current conditions.

[0041] In use, after the device is assembled, the power supply is connected to the power supply side conductive plate 15 via the power supply side terminal 16. The moving blade 13 rotates and closes around the pin 17, and the overtravel spring 12 ensures that it is in tight contact with the power supply side conductive plate 15. The current is transmitted through the moving blade 13, copper clip 11, phase conductor 9, and second connecting plate 8 to the first connecting plate 5, and finally output from the load side terminal 3. During operation, the heat-conducting component 10 efficiently dissipates heat. In case of a fault, the zero-sequence current transformer 7 is triggered to disconnect, and the arc-blocking component 6 and the isolation blade sleeve 14 block the arc. After the fault is cleared, the moving blade resets and operation resumes.

[0042] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A circuit breaker performance enhancement device, characterized in that: Includes a base plate (1), a zero-sequence current transformer (7), multiple power supply side components, multiple moving knife components, and multiple load side components. Each of the power supply side components is arranged in sequence and fixedly installed on the base plate (1), each of the moving blade components is arranged in sequence and fixedly installed on the base plate (1), and each of the load side components is arranged in sequence and fixedly installed on the base plate (1); The moving blade assembly is located between the power supply side assembly and the load side assembly. After the moving blade assembly is closed, the power supply side assembly and the load side assembly form a conductive path. The load-side assembly includes a first connecting plate (5), and the zero-sequence current transformer (7) is mounted on the first connecting plate (5) of each load-side assembly, and the zero-sequence current transformer (7) is fixedly installed with the base plate (1); an arc-blocking component (6) is wrapped and fixedly installed on the first connecting plate (5). The moving blade assembly includes a copper clip (11), a phase conductor (9), and a heat-conducting component (10). The copper clip (11) is fixedly installed on the base plate (1), the heat-conducting component (10) is fixedly installed inside the copper clip (11), and the phase conductor (9) is fixedly installed on the heat-conducting component (10), with the phase conductor (9) abutting against the copper clip (11). The phase conductor (9) is fixedly connected to the first connecting plate (5).

2. The circuit breaker performance enhancement device according to claim 1, characterized in that: The moving blade assembly also includes a moving blade (13) and a pin (17). The upper part of the copper clip (11) and the heat-conducting component (10) forms an upward arc-shaped protrusion. One end of the moving blade (13) is inserted into the copper clip (11) and the heat-conducting component (10) respectively. The pin (17) passes through the copper clip (11), the moving blade (13), and the heat-conducting component (10) in sequence. The moving blade (13) is rotatably installed with the copper clip (11) and the heat-conducting component (10) through the pin (17).

3. The circuit breaker performance enhancement device according to claim 2, characterized in that: An isolation blade sleeve (14) is installed on the moving blade assembly. The isolation blade sleeve (14) has an installation groove and a spring groove (1402) inside. A blade hole (1401) is opened on the isolation blade sleeve (14). The pin (17) is located in the installation groove and is rotatably installed with the isolation blade sleeve (14). The moving blade (13) passes through the blade hole (1401).

4. The circuit breaker performance enhancement device according to claim 3, characterized in that: A fixing block (18) is fixedly installed on the side wall of the moving blade (13), and an overtravel spring (12) is fixedly installed on the fixing block (18). The end of the overtravel spring (12) away from the fixing block (18) is inserted into the spring groove (1402) of the isolation blade sleeve (14).

5. The circuit breaker performance enhancement device according to claim 2, characterized in that: The power supply side assembly includes a power supply side conductive plate (15) and a power supply side terminal (16). The power supply side conductive plate (15) is fixedly installed on the base plate (1), and the power supply side terminal (16) is threaded onto the power supply side conductive plate (15). After the moving blade (13) rotates partially around the pin (17) as the axis, the end of the moving blade (13) abuts against the power supply side conductive plate (15).

6. The circuit breaker performance enhancement device according to claim 1, characterized in that: The load-side assembly also includes a load-side terminal (3), a load-side conductive plate (4), and a second connecting plate (8). The load-side conductive plate (4) is fixedly mounted on the base plate (1), and the load-side terminal (3) is threaded onto the load-side conductive plate (4). One end of the second connecting plate (8) is fixedly connected to the first connecting plate (5), and the other end of the second connecting plate (8) is fixedly connected to the phase conductor (9).

7. The circuit breaker performance enhancement device according to claim 1, characterized in that: The arc-blocking component (6) is made of arc-resistant insulating material.

8. The circuit breaker performance enhancement device according to claim 1, characterized in that: The heat-conducting component (10) is made of a high thermal conductivity metal material.

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