Circuit breaker device with lightning protection function

Abstract

A circuit breaker device with a lightning protection function belongs to the technical field of circuit breakers and comprises a main body support and a circuit breaker body, one side of the circuit breaker body is provided with a support mechanism, one end of the support mechanism is connected with a circuit breaker cross beam of the circuit breaker body, and the other end of the support mechanism is far away from the circuit breaker cross beam. A current transformer and a lightning arrester are sequentially arranged on the top side of the support mechanism in the direction away from the circuit breaker, the current transformer is connected with the circuit breaker body through a connecting copper bar A, and the lightning arrester is connected with the current transformer through a connecting copper bar B. The circuit breaker device with the lightning protection function is reasonable in design and simple in structure, the current transformer and the lightning arrester can be installed on the circuit breaker together, a site does not need to be independently planned for installation on site, manpower, financial resources, material resources and site space can be effectively saved, safety performance can be effectively improved, and the circuit breaker device with the lightning protection function is suitable for popularization and application. The popularization is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a circuit breaker device with lightning protection function. Background Technology

[0002] A circuit breaker is a switching device that operates to connect and disconnect power distribution circuits, motors, or other electrical equipment according to specified conditions, providing protection. It automatically disconnects the circuit when overloaded, short-circuited, or undervoltage occurs, serving as the primary protective switch for power distribution lines and electrical equipment. Furthermore, it can also infrequently connect and disconnect circuits and control motors under normal conditions.

[0003] Circuit breakers play an irreplaceable role in power systems, and their stability and reliability directly affect the safe operation of the power system. Therefore, when selecting and using circuit breakers, it is necessary to fully understand their working principles, types, functions and applications, as well as selection and parameters.

[0004] At present, with the continuous development of the power system, the reliability requirements of equipment operation are getting higher and higher. Conventional 35 kV circuit breakers do not have surge arresters installed. Surge arresters need to be installed separately on the construction site. This traditional on-site installation method has the following shortcomings: the site needs to be planned separately, the foundation needs to be poured, special installation brackets need to be used, and personnel need to be arranged for installation, which wastes a lot of manpower, financial resources, material resources and site space. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology, which wastes manpower, financial resources, material resources and site space by installing surge arresters separately on site. It provides a circuit breaker device with surge protection function. Its design is reasonable and its structure is simple. The current transformer and surge arrester can be installed together on the circuit breaker. There is no need to plan a separate site for installation. It can not only effectively save manpower, financial resources, material resources and site space, but also effectively improve safety performance and is suitable for promotion.

[0006] This utility model is achieved through the following technical solution: A circuit breaker device with lightning protection function includes a main support and a circuit breaker body. The main support is installed on the ground, and the circuit breaker body is installed on the main support. A support mechanism is provided on one side of the circuit breaker body. One end of the support mechanism is connected to the circuit breaker crossbeam of the circuit breaker body, and the other end of the support mechanism is away from the circuit breaker crossbeam. A current transformer and a surge arrester are arranged sequentially on the top side of the support mechanism in the direction away from the circuit breaker. The current transformer is fixed at a position close to the circuit breaker body, and the surge arrester is fixed at a position close to the current transformer. The current transformer is connected to the circuit breaker body through a connecting copper busbar A, and the surge arrester is connected to the current transformer through a connecting copper busbar B.

[0007] A further improvement of this utility model is that the support mechanism includes two triangular supports with a space between them and the two triangular supports are arranged symmetrically; the top sides of the two triangular supports are connected to the current transformer, and the top sides of the two triangular supports are connected to a fixing plate, and the surge arrester is fixed on the fixing plate.

[0008] A further improvement of this utility model is that an online monitor located outside the surge arrester is provided at the end of the support mechanism away from the circuit breaker beam, and the online monitor is electrically connected to the surge arrester.

[0009] A further improvement of this utility model is that at least three support mechanisms are provided, and the three support mechanisms are evenly spaced.

[0010] A further improvement of this utility model is that the connecting copper busbar A includes an inclined transition portion, one end of which is connected to a horizontal portion A, and the other end of which is connected to a horizontal portion B. The horizontal portion A is connected to the circuit breaker body, and the horizontal portion B is connected to the current transformer. The height of the horizontal portion A is less than the height of the horizontal portion B.

[0011] A further improvement of this utility model is that the connecting copper busbar B includes an arc transition portion, one end of which is connected to a horizontal portion C, and the other end of which is connected to a vertical portion. The bottom end of the vertical portion is connected to a horizontal portion D located on its outer side. The horizontal portion C is connected to a current transformer, and the horizontal portion D is connected to a surge arrester.

[0012] As can be seen from the above technical solutions, the beneficial effects of this utility model are:

[0013] 1. This device does not require a separate surge arrester to be installed on site, saving manpower, material resources and site space required for on-site installation; at the same time, this circuit breaker device can also be used when there is insufficient site space to install a separate surge arrester.

[0014] 2. By mounting the surge arrester and current transformer simultaneously on the circuit breaker body through a support mechanism, the operating overvoltage caused by changes in circuit state during the opening and closing operations of the circuit breaker body can be limited.

[0015] 3. When lightning strikes and breaks the circuit breaker body, it generates an extremely high instantaneous voltage. The surge arrester can divert the lightning current to the ground, thereby limiting the voltage amplitude across the circuit breaker body and preventing lightning overvoltage from damaging the insulation of the circuit breaker body and other related equipment, thus ensuring the safe operation of the power system during thunderstorms.

[0016] 4. The insulation performance of a circuit breaker body will gradually decline over a long period of time. A surge arrester can effectively limit various overvoltages, reduce the voltage stress on the circuit breaker body, reduce the risk of insulation aging and damage, extend the service life of the equipment, and improve the reliability and stability of the circuit breaker body operation. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the support mechanism according to a specific embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the connecting copper busbar A in a specific embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting copper busbar B in a specific embodiment of this utility model.

[0022] In the diagram: 1. Main support; 2. Circuit breaker body; 201. Circuit breaker beam; 3. Triangular support; 4. Current transformer; 5. Surge arrester; 501. Fixing plate; 6. Connecting copper busbar A; 601. Inclined transition section; 602. Horizontal section A; 603. Horizontal section B; 7. Connecting copper busbar B; 701. Arc transition section; 702. Horizontal section C; 703. Vertical section; 704. Horizontal section D; 8. Online monitor. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] Please refer to the attached document. Figure 1-4The following is a description of a specific embodiment: The circuit breaker device with lightning protection function described in this utility model includes a main support 1 and a circuit breaker body 2. In conjunction with an existing 35 kV circuit breaker, the main support 1 is installed on the ground, and the circuit breaker body 2 is installed on the main support 1.

[0025] At least three support mechanisms are provided on one side of the circuit breaker body 2, and the three support mechanisms are evenly spaced. One end of the support mechanism is connected to the circuit breaker crossbeam 201 of the circuit breaker body 2, and the other end of the support mechanism is away from the circuit breaker crossbeam 201. A current transformer 4 and a surge arrester 5 are arranged sequentially on the top side of the support mechanism in the direction away from the circuit breaker. The current transformer 4 is fixed at a position close to the circuit breaker body 2, and the surge arrester 5 is fixed at a position close to the current transformer 4. The current transformer 4 is connected to the circuit breaker body 2 through a connecting copper busbar A6, and the surge arrester 5 is connected to the current transformer 4 through a connecting copper busbar B7.

[0026] The support mechanism includes two triangular supports 3 with a gap between them and the two triangular supports 3 are arranged symmetrically. The top sides of the two triangular supports 3 are connected to the current transformer 4 by bolt assembly, and the top sides of the two triangular supports 3 are connected to the fixing plate 501 by bolt assembly. The surge arrester 5 is fixed to the fixing plate 501 by bolt assembly.

[0027] Specifically, the connecting copper busbar A6 includes an inclined transition section 601, one end of which is connected to a horizontal section A602, and the other end of which is connected to a horizontal section B603. The horizontal section A602 is connected to the circuit breaker body 2 by a bolt assembly, and the horizontal section B603 is connected to the current transformer 4 by a bolt assembly. The height of the horizontal section A602 is less than the height of the horizontal section B603.

[0028] Specifically, the connecting copper busbar B7 includes an arc transition section 701, one end of which is connected to a horizontal section C702, and the other end of which is connected to a vertical section 703. The bottom end of the vertical section 703 is connected to a horizontal section D704 located on its outer side. The horizontal section C702 is connected to the current transformer 4 via a bolt assembly, and the horizontal section D704 is connected to the surge arrester 5 via a bolt assembly.

[0029] The working principle of this utility model is as follows: This circuit breaker device integrates the surge arrester 5 and the current transformer 4 onto the circuit breaker body 2 via a support mechanism. This limits the operational overvoltage generated by changes in circuit state during the opening and closing operations of the circuit breaker body 2. When lightning strikes the circuit breaker body 2, it generates an extremely high instantaneous voltage. The surge arrester 5 can divert the lightning current to the ground, thus limiting the voltage amplitude across the circuit breaker body 2. This prevents lightning overvoltage from damaging the insulation of the circuit breaker body 2 and other related equipment, ensuring the safety of the power system during thunderstorms. Furthermore, the insulation performance of the circuit breaker body 2 gradually declines over long-term operation. The surge arrester 5 effectively limits various overvoltages, reduces the voltage stress borne by the circuit breaker body 2, reduces the risk of insulation aging and damage, extends the service life of the equipment, and improves the reliability and stability of the circuit breaker body 2.

[0030] In one embodiment, an online monitor 8 is installed on the outside of the surge arrester 5 via an angle steel at the end of the support mechanism away from the circuit breaker beam 201. The online monitor 8 is electrically connected to the surge arrester 5. Through the above design, the online monitor 8 can detect the voltage of the surge arrester 5. When an overvoltage flows into the surge arrester 5 from the circuit breaker body 2, the online monitor 8 can detect it in time and simultaneously divert this overvoltage to the ground through the surge arrester 5, thereby preventing the overvoltage from damaging the circuit breaker body.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A circuit breaker device with lightning protection function, comprising a main support (1) and a circuit breaker body (2), the main support (1) is installed on the ground, and the circuit breaker body (2) is installed on the main support (1), characterized in that, A support mechanism is provided on one side of the circuit breaker body (2). One end of the support mechanism is connected to the circuit breaker crossbeam (201) of the circuit breaker body (2), and the other end of the support mechanism is away from the circuit breaker crossbeam (201). A current transformer (4) and a surge arrester (5) are arranged sequentially on the top side of the support mechanism in the direction away from the circuit breaker. The current transformer (4) is fixed at a position close to the circuit breaker body (2), and the surge arrester (5) is fixed at a position close to the current transformer (4). The current transformer (4) is connected to the circuit breaker body (2) through a connecting copper busbar A (6), and the surge arrester (5) is connected to the current transformer (4) through a connecting copper busbar B (7). The connecting copper busbar A (6) includes an inclined transition part (601), one end of which is connected to The horizontal part A (602) is connected to the other end of the inclined transition part (601), and the horizontal part B (603) is connected to the other end of the horizontal part A (602). The horizontal part A (602) is connected to the circuit breaker body (2), and the horizontal part B (603) is connected to the current transformer (4). The height of the horizontal part A (602) is less than the height of the horizontal part B (603). The connecting copper busbar B (7) includes an arc transition part (701). One end of the arc transition part (701) is connected to the horizontal part C (702), and the other end of the arc transition part (701) is connected to the vertical part (703). The bottom end of the vertical part (703) is connected to the horizontal part D (704) located outside it. The horizontal part C (702) is connected to the current transformer (4), and the horizontal part D (704) is connected to the surge arrester (5).

2. The circuit breaker device with lightning protection function according to claim 1, characterized in that, The support structure includes two triangular supports (3), with a space between the two triangular supports (3) and the two triangular supports (3) are arranged symmetrically; the top sides of the two triangular supports (3) are connected to the current transformer (4), and the top sides of the two triangular supports (3) are connected to a fixing plate (501), and the surge arrester (5) is fixed on the fixing plate (501).

3. A circuit breaker device with lightning protection function according to claim 1 or 2, characterized in that, An online monitor (8) is installed at the end of the support structure away from the circuit breaker beam (201) and located outside the surge arrester (5). The online monitor (8) is electrically connected to the surge arrester (5).

4. The circuit breaker device with lightning protection function according to claim 3, characterized in that, There are at least three support structures, which are evenly spaced apart.

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