CN221239576U - DC special combined switch - Google Patents

Abstract

The utility model provides a special combination switch of direct current, it includes 2 utmost point isolator and 1 utmost point at least fuses, 2 utmost point isolator and 1 utmost point at least fuses make up into a whole dress in direct current power system, control direct current power system's break-make. According to the combined switch, the isolating switch and the fuse are combined into a whole, so that the volume of the whole occupied space of the switch is reduced, the applicable scene of the switch is enlarged, meanwhile, the consumption of connecting copper bars is reduced between the isolating switch and the fuse, the product cost is saved, the fuse fusing indication can be integrated to the secondary terminal of the isolating switch, the wiring is convenient, and the wiring difficulty is reduced; on the other hand, the isolating switch and the fuse are combined into a whole, so that the current protection matching degree is improved, the protection of the full current section of the direct current power system is realized, the model selection construction is not needed, the fuse can be detached and maintained from the front, and the maintenance difficulty is reduced.

Description

DC special combined switch

Technical Field

The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a special direct-current combined switch.

Background

The term switch is interpreted as on and off. It refers to an element that can open a circuit, interrupt a current, or cause it to flow to other circuits. The most common switch is a human operated electromechanical device in which there is one or several contacts. "closed" of the contact means that the contact is conductive, allowing current to flow; an "open" switch indicates that the contact is not conducting to form an open circuit and no current is allowed to flow. The development history of the switch is developed from the original knife switch needing manual operation to the current intelligent switch applied to various large-scale electrical control equipment, the functions of the switch are more and more, and the safety is higher and higher.

Along with the development of direct current power systems such as photovoltaic, energy storage, rail traffic, data centers and the like, the application of the switch in the direct current systems is becoming wider and wider. In order to improve the working voltage and breaking capacity of a switch in a direct current power system, in the prior art, a conventional isolating switch and a conventional fuse commonly used in an alternating current power system are commonly combined to control the switching function of the direct current power system. However, in this way, the operation voltage and breaking capacity of the switch in the dc power system can be improved, but the following disadvantages exist:

(1) The existing combination of the isolating switch and the fuse adopts a mode of a 4-pole isolating switch and a two-pole fuse, so that the space occupation is large, and the isolating switch and the fuse cannot be suitable for a scene in a narrow space;

(2) The existing combined wiring of the isolating switch and the fuse is complex, more materials are required to be consumed, and the product cost is increased;

(3) In the prior art, the isolating switch and the fuse are required to be purchased independently, so that the isolating switch and the fuse are required to be matched, the difficulty in model selection is increased, and the installation and use cost is also increased.

(4) The combination of the prior isolating switch and the fuse adopts a mode of a 4-pole isolating switch and a two-pole fuse, so that the maintenance is difficult to be carried out from the front, and the difficulty of replacement and maintenance is increased.

Disclosure of utility model

The utility model aims to provide a special DC combined switch aiming at the defects of the combined use of the isolating switch and the fuse in the prior DC power system, and combines the isolating switch and the fuse into a whole, thereby effectively solving the defects of the combined use of the isolating switch and the fuse in the prior art and ensuring the working voltage and breaking capacity of the switch in the DC power system.

Technical proposal

In order to achieve the purpose, the utility model provides a special combined switch for direct current, which is characterized by comprising at least 2-pole isolating switches and at least 1-pole fuses, wherein the at least 2-pole isolating switches and the at least 1-pole fuses are combined into a whole and are arranged in a direct current power system to control the on-off of the direct current power system, when small fault current flows in the direct current power system, the at least 2-pole isolating switches are used for controlling the on-off of the direct current power system, and when large short circuit current flows in the direct current power system, the at least 1-pole fuses can automatically disconnect a circuit to protect the whole direct current power system.

In one embodiment, the at least 1 pole fuse and the at least 2 pole isolating switch are integrally or integrally assembled.

In one embodiment, the at least 1 pole fuse is mounted on either the left or right side or both sides of the at least 2 pole disconnector.

In one embodiment, the at least 1 pole fuse is assembled on the left side or the right side or both sides of the left side and the right side of the whole at least 2 pole isolating switch through screw connection or clamping structures.

In one embodiment, the at least 1 pole fuse and the at least 2 pole isolating switch are integrally mounted on the splice tray.

In one embodiment, the at least 1-pole fuse is provided with a fusing indicating device, and the fusing indicating device is connected to the secondary terminal of the at least 2-pole isolating switch through a wire.

In one embodiment, the connection wire row of the at least 2-pole isolating switch is connected with the corresponding connection wire row of the at least 1-pole fuse, so that the at least 2-pole isolating switch and the at least 1-pole fuse are combined to form a plurality of wire outlet modes.

In one embodiment, the at least 1 pole fuse is mounted on the rear side of the at least 2 pole disconnector above or below the corresponding wiring row of the at least 2 pole disconnector.

In one embodiment, the at least 1 pole fuse is mounted between the at least 2 pole isolation switches.

Advantageous effects

The utility model provides a special DC combined switch, which comprises at least 2-pole isolating switches and at least 1-pole fuses, wherein the at least 2-pole isolating switches and the at least 1-pole fuses are combined into a whole and are arranged in a DC power system to control the on-off of the DC power system, when a small current flows in the DC power system, if a circuit is required to be cut off, the system outputs an action signal to the at least 2-pole isolating switches, the at least 2-pole isolating switches are used for controlling the on-off of the DC power system, and when a large current flows in the DC power system, the circuit is disconnected through the at least 1-pole fuses, so that the whole DC power system is protected. According to the combined switch, the isolating switch and the fuse are combined into a whole, so that the volume of the whole occupied space of the switch is reduced, the applicable scene of the switch is enlarged, meanwhile, the consumption of connecting copper bars is reduced between the isolating switch and the fuse, the product cost is saved, the fuse fusing indication can be integrated to the secondary terminal of the isolating switch, the wiring is convenient, and the wiring difficulty is reduced; on the other hand, the isolating switch and the fuse are combined into a whole, so that the current protection matching degree is improved, the protection of the full current section of the direct current power system is realized, the model selection construction is not needed, the installation difficulty is reduced, the fuse can be disassembled and assembled from the front, and the maintenance difficulty is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a diagram of the product of example 1 of the present utility model;

FIG. 2 is a schematic diagram showing the separation of a fuse and a disconnecting switch in embodiment 1 of the present utility model;

FIG. 3 is a schematic front view of the embodiment 1 of the present utility model with the fuse and the disconnector separated;

FIG. 4 is a view in the direction A of FIG. 3;

FIG. 5 is a schematic diagram of the mounting connection of the signal collector of the fuse in embodiment 1 of the present utility model;

FIG. 6 is a schematic rear view of the embodiment 1 of the present utility model with the fuse and the disconnector separated;

FIG. 7 is a right-hand schematic view of the embodiment 1 of the present utility model with the fuse and the disconnector separated;

FIG. 8 is a diagram of a product of the assembled floor in example 2 of the present utility model;

FIG. 9 is a second product drawing of the assembled floor of embodiment 2 of the present utility model;

FIG. 10 is a third product drawing of the assembled floor of embodiment 2 of the present utility model;

FIG. 11 is a diagram of the product of example 3 of the present utility model;

FIG. 12 is a second diagram of the product of example 3 of the present utility model;

FIG. 13 is a third product chart of example 3 of the present utility model;

FIG. 14 is a schematic front view of the product of example 3 of the present utility model;

FIG. 15 is a diagram of the product of example 4 of the present utility model;

FIG. 16 is a second diagram of the product of example 4 of the present utility model;

FIG. 17 is a third product chart of example 4 of the present utility model;

FIG. 18 is a schematic front view of the product of example 4 of the present utility model;

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present application for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in the description of the present application includes any and all combinations of one or more of the associated listed items.

Example 1

In the prior art, the isolating switch and the fuse which are commonly used in the alternating current power system are combined to realize the control of the switching function of the direct current power system. However, the switch control mode occupies a large volume, is difficult to replace and high in cost, has complex shape selection and has more defects in practical application. In order to solve these problems, as shown in fig. 1, the present embodiment provides a special dc combined switch, which includes at least 2-pole isolating switch 1 and at least 1-pole fuse 2, as shown in fig. 2, the at least 2-pole isolating switch 1 and the at least 1-pole fuse 2 are combined into a whole to be installed in a dc power system to control the on-off of the dc power system, when a small fault current (generally referred to as an overload current and a critical current) flows in the dc power system, if the system needs to cut off a circuit, the system (generally a cabinet system) outputs an action signal to the at least 2-pole isolating switch 1, the on-off of the dc power system is controlled by the at least 2-pole isolating switch 1, and when a large short circuit current flows in the dc power system, the at least 1-pole fuse 2 automatically cuts off the circuit to protect the whole dc power system.

Specifically, the method comprises the following steps: as shown in fig. 1, the at least 1-pole fuse 2 is mounted on the left or right side or both sides of the at least 2-pole disconnecting switch 1. The at least 1-pole fuse 2 and the at least 2-pole isolating switch 1 are assembled together to form a whole or are assembled into a whole. In this example, as shown in fig. 1 to 6, the fuse 2 is 2-pole, the isolating switch is 2-pole, and the fuse 2 is respectively arranged at the left side and the right side of the 2-pole isolating switch 1. Through combining isolator and fuse into a whole, reduced the whole occupation space's of switch volume, enlarged the applicable scene of switch, realized the protection of direct current power system full current section, need not to carry out the model construction in addition, reduced the installation degree of difficulty. Further, the at least 1 pole fuse 2 is assembled on the left side or the right side or both sides of the left side and the right side of the whole at least 2 pole isolating switch 1 through screw connection or clamping structures. In this embodiment, the at least 1 pole fuse 2 is connected and assembled on the left and right sides of the whole at least 2 pole isolating switch 1 through a screw 4. The isolating switch and the fuse are assembled by adopting the screws, so that the wiring is simple, the consumption for connecting the copper bars is reduced, and the product cost is saved; in this embodiment, as shown in fig. 5, the at least 1-pole fuse 2 is provided with a fuse indicating device 2a, and the fuse indicating device 2a is connected to the secondary terminal of the at least 2-pole isolating switch 1 through a wire. When the fuse breaks, the state of the fuse is displayed through electric signal conduction.

As shown in fig. 1,4 and 6, the connection wire row of the at least 2-pole isolating switch 1 is connected with the corresponding connection wire row of the at least 1-pole fuse 2, so that the at least 2-pole isolating switch 1 and the at least 1-pole fuse 2 are combined to form a plurality of outlet manners. The mode that the upper wiring, the lower wiring or the upper and lower mixed external wiring of the combined switch can be realized after the different wiring rows of the isolating switch 1 and the fuse 2 are connected through the corresponding connection rows, thereby being convenient for maintenance.

The at least 2-pole isolating switch 1 can be replaced by a circuit breaker, and the circuit breaker and the fuse form a combined switch, so that the function of controlling the on-off of the direct-current power system can be realized.

Example 2

The at least 1-pole fuse 2 and the at least 2-pole isolating switch 1 are integrally arranged on the assembling base plate 5 shown in figures 8,9 and 10. Specifically, the at least 2-pole isolating switch 1 is arranged in the middle of the assembling bottom plate 5, and the at least 1-pole fuse 2 is arranged in a corresponding cavity on the assembling bottom plate 5 to form a whole. Other structures are the same as those of the embodiment 1, and the embodiment adopts a mode of installing the isolating switch and the fuse on the assembly bottom plate, so that the installation and maintenance difficulty is further simplified.

Example 3

In this embodiment, as shown in fig. 11, 12, 13 and 1,4, the at least 1-pole fuse 2 is mounted on the rear side of the at least 2-pole isolating switch 1 and above the corresponding wiring row 3 of the at least 2-pole isolating switch 1. Other structures are the same as those of embodiment 1. The structure can further reduce the space occupied by the combined switch in the left-right direction, and is suitable for a scene with a spacious installation space in the front-back direction.

Example 4

In this embodiment, as shown in fig. 15,16,17 and 18, the at least 1 pole fuse 2 is mounted on the rear side of the at least 2 pole isolating switch 1 and is located below the corresponding wiring row 3 of the at least 2 pole isolating switch 1. Other structures are the same as those of embodiment 1. The structure can further reduce the space occupied by the combined switch in the left-right direction, and is suitable for a scene with a spacious installation space in the front-back direction.

Example 5

The at least 1-pole fuse 2 is mounted between the at least 2-pole disconnectors 1. Other structures are the same as those of embodiment 1, and the spatial layout is further optimized by adopting the structures and the effects of embodiment 1.

The utility model provides a special direct-current combined switch, which combines an isolating switch and a fuse into a whole, so that the volume of the whole occupied space of the switch is reduced, the applicable scene of the switch is enlarged, meanwhile, the consumption of connecting copper bars between the isolating switch and the fuse is reduced, the product cost is saved, the fuse fusing indication can be integrated to a secondary terminal of the isolating switch, the wiring is convenient, and the wiring difficulty is reduced; on the other hand, the isolating switch and the fuse are combined into a whole, so that the current protection matching degree is improved, the protection of the full current section of the direct current power system is realized, the model selection construction is not needed, the installation difficulty is reduced, the fuse can be disassembled and assembled from the front, and the maintenance difficulty is reduced.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (9)

1. The combined switch special for direct current is characterized by comprising at least 2-pole isolating switches (1) and at least 1-pole fuses (2), wherein the at least 2-pole isolating switches (1) and the at least 1-pole fuses (2) are combined into a whole and are arranged in a direct current power system to control the on-off of the direct current power system, when small fault current flows in the direct current power system, the at least 2-pole isolating switches (1) are used for controlling the on-off of the direct current power system, and when large short circuit current flows in the direct current power system, the at least 1-pole fuses (2) can automatically break a circuit to protect the whole direct current power system.

2. A DC-only combination switch as set forth in claim 1, characterized in that said at least 1 pole fuse (2) is integrally or integrally assembled with said at least 2 pole isolating switch (1).

3. A DC-only combination switch as claimed in claim 2, wherein said at least 1-pole fuse (2) is mounted on either the left or right side or both sides of said at least 2-pole disconnector (1).

4. A DC-dedicated combination switch as set forth in claim 3, wherein said at least 1-pole fuse (2) is assembled on either the left or right side or both sides of the entire at least 2-pole isolating switch (1) by screw connection or a clamping structure.

5. A DC-only combination switch as set forth in claim 3, wherein said at least 1 pole fuse (2) and said at least 2 pole isolating switch (1) are integrally mounted on a splice tray (5).

6. A DC-only combination switch as claimed in claim 1, wherein the at least 1-pole fuse (2) is provided with a fuse indicating device (2 a), and the fuse indicating device (2 a) is connected to the secondary terminal of the at least 2-pole isolating switch (1) through a wire.

7. A DC-specific combination switch as set forth in claim 1, wherein the connection line of the at least 2-pole isolating switch (1) and the corresponding connection line of the at least 1-pole fuse (2) are connected to form a plurality of outlet modes integrally formed by the at least 2-pole isolating switch (1) and the at least 1-pole fuse (2).

8. A DC-specific combination switch as set forth in claim 1, wherein said at least 1-pole fuse (2) is mounted on the rear side of said at least 2-pole isolating switch (1) above or below the corresponding wiring row of said at least 2-pole isolating switch (1).

9. A DC-specific combination switch as claimed in claim 1, wherein said at least 1-pole fuse (2) is mounted between said at least 2-pole disconnectors (1).