Compact vacuum circuit breaker

Abstract

The utility model provides a compact vacuum circuit breaker, including vacuum circuit breaker body, be provided with three vacuum interrupter of interval distribution from left to right on vacuum circuit breaker body, three vacuum interrupter correspond to the A phase, B phase and C phase of vacuum circuit breaker body respectively, the vacuum interrupter of intermediate position is set from top to bottom to make three vacuum interrupter arrange and form the structure of the character of Chinese character pin, the utility model makes the vacuum circuit breaker of rated voltage 40.5kV, rated current 630-3150A, rated short circuit breaking current 40kA can be applied in 600mm width's high voltage switch cabinet, satisfy the use demand.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum circuit breakers, and particularly to a compact vacuum circuit breaker. Background Art

[0002] A vacuum circuit breaker is an electrical device used to control the on-off of a circuit in an electrical system. Currently, the outer diameter of the vacuum arc extinguishing chamber of a vacuum circuit breaker with a rated voltage of 40.5 kV, a rated current of 630 - 3150 A, and a rated short-circuit breaking current of 40 kA on the market is relatively large. Moreover, the arrangement of the three vacuum arc extinguishing chambers corresponding to the A phase, B phase, and C phase in the existing vacuum circuit breaker is in a linear arrangement, and the axial center distance between adjacent two vacuum arc extinguishing chambers is at least 210 mm. As a result, this type of vacuum circuit breaker can only be applied to high-voltage switch cabinets with a width of at least 800 mm. That is, when using a high-voltage switch cabinet with a width of 600 mm, only a small-sized vacuum circuit breaker can be used, but the fault current parameters are difficult to meet the usage requirements. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a compact vacuum circuit breaker, which enables a vacuum circuit breaker with a rated voltage of 40.5 kV, a rated current of 630 - 3150 A, and a rated short-circuit breaking current of 40 kA to be applied to a high-voltage switch cabinet with a width of 600 mm to meet the usage requirements.

[0004] The utility model provides a compact vacuum circuit breaker, including a vacuum circuit breaker body. There are three vacuum arc extinguishing chambers arranged at intervals from left to right on the vacuum circuit breaker body, and the three vacuum arc extinguishing chambers respectively correspond to the A phase, B phase, and C phase of the vacuum circuit breaker body; the vacuum arc extinguishing chamber in the middle position is offset from top to bottom so that the three vacuum arc extinguishing chambers are arranged in a "pin" shape structure.

[0005] After adopting the above structure, since the vacuum arc extinguishing chamber in the middle position is offset from top to bottom so that the three vacuum arc extinguishing chambers are arranged in a "pin" shape structure, on the premise of ensuring the insulation requirements of each phase of the A phase, B phase, and C phase, the axial center distance between every two adjacent vacuum arc extinguishing chambers in the left-right direction can be reduced, and further the width of the vacuum circuit breaker can be reduced. That is, a vacuum circuit breaker with a rated voltage of 40.5 kV, a rated current of 630 - 3150 A, and a rated short-circuit breaking current of 40 kA can be applied to a high-voltage switch cabinet with a width of 600 mm to meet the usage requirements.

[0006] In one possible implementation, the outer diameter of each vacuum interrupter is 135mm, the center-to-center distance W between any two adjacent vacuum interrupters in the left-right direction is 160mm, and the center-to-center distance L between any two adjacent vacuum interrupters in the up-down direction is 100mm. By adopting these dimensional parameters, while ensuring the insulation requirements of phases A, B, and C, the width of a vacuum circuit breaker with a rated voltage of 40.5kV, a rated current of 630-3150A, and a rated short-circuit breaking current of 40kA can be reduced. This allows the vacuum circuit breaker with these parameters to be used in a 600mm wide high-voltage switchgear to meet the application requirements. Attached Figure Description

[0007] Figure 1 A three-dimensional structural diagram of a vacuum circuit breaker;

[0008] Figure 2 This is a rear view schematic diagram of a vacuum circuit breaker. Detailed Implementation

[0009] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0010] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0011] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0012] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0013] See Figure 1-2As shown in the figure, an embodiment of the present application discloses a compact vacuum circuit breaker, which includes a vacuum circuit breaker body 1. There are three vacuum interrupters 2 arranged at intervals from left to right on the vacuum circuit breaker body 1. The three vacuum interrupters 2 respectively correspond to the A phase, B phase and C phase of the vacuum circuit breaker body 1. The vacuum interrupter 2 located in the middle position is offset from top to bottom so that the three vacuum interrupters 2 are arranged to form a "pin" - shaped structure.

[0014] The outer diameter of each vacuum interrupter 2 is 135 mm. The axial center distance W in the left - right direction between every two adjacent vacuum interrupters 2 is 160 mm, and the axial center distance L in the up - down direction between every two adjacent vacuum interrupters 2 is 100 mm. By adopting such dimensional parameters, on the premise of ensuring the insulation requirements of each phase of the A phase, B phase and C phase, the width of the vacuum circuit breaker with a rated voltage of 40.5 kV, a rated current of 630 - 3150 A and a rated short - circuit breaking current of 40 kA can be made smaller. Thus, the vacuum circuit breaker with such parameters can be applied in a high - voltage switchgear cabinet with a width of 600 mm to meet the usage requirements.

[0015] As described above, the above is only the specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A compact vacuum circuit breaker, comprising a vacuum circuit breaker body (1), wherein the vacuum circuit breaker body (1) is provided with three vacuum interrupting chambers (2) spaced apart from left to right, the three vacuum interrupting chambers (2) respectively corresponding to phase A, phase B and phase C of the vacuum circuit breaker body (1); characterized in that: The vacuum interrupter (2) located in the middle position is offset from top to bottom so that the three vacuum interrupters (2) are arranged to form a "pin" - shaped structure.

2. The compact vacuum circuit breaker according to claim 1, characterized in that: The outer diameter of each of the vacuum interrupters (2) is 135 mm. The axial center distance W in the left - right direction between every two adjacent vacuum interrupters (2) is 160 mm, and the axial center distance L in the up - down direction between every two adjacent vacuum interrupters (2) is 100 mm.

Images