Alternating current and direct current integrated distribution box

Abstract

An alternating current and direct current integrated distribution box comprises a box body, an alternating current cabinet is arranged at the upper end of the box body, a plurality of cable joints used for input or output are arranged at the upper end of the alternating current cabinet, a direct current cabinet is arranged at the lower end of the box body, and a plurality of cable joints used for input or output are arranged at the lower end of the direct current cabinet. According to the application, two distribution boxes for alternating current and direct current power supply are structurally fused into one alternating current and direct current universal distribution box; the AC and DC loops are arranged up and down in the distribution box; an alternating current loop and a direct current loop are strictly separated; incoming and outgoing lines of the upper half part adopt upper inlet and upper outlet, and incoming and outgoing lines of the lower half part adopt lower inlet and lower outlet; the problems can be effectively solved, meanwhile, alternating-current and direct-current wires are not mutually strung, and mutual interference on respective signals is avoided.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage power distribution cabinets, in particular to an AC / DC integrated power distribution box. Background Art

[0002] In the low-voltage distribution room of the data center, there is an integrated power cabinet. This power cabinet has a UPS cabinet more than the ordinary low-voltage distribution cabinet. The UPS cabinet is usually equipped with a large number of backup batteries. When a power outage occurs, the self-powered batteries are used to supply power to the loads behind the distribution board through the UPS. Therefore, a large number of lead-acid batteries are installed in the battery room. Usually, a dedicated DC switch box is required to collect the battery current. The battery room also has some AC loads such as exhaust fans, lighting, and fire protection. Special AC distribution boxes are also used to power these AC loads.

[0003] Separate design and installation of AC distribution boxes and DC distribution boxes in the same power room will increase the construction area of ​​the distribution room and waste the land resources of the distribution room. In addition, the use of two traditional distribution boxes will increase the investment in industrial consumables. The operation and maintenance efficiency of users is also relatively low. Utility Model Content

[0004] In order to solve the above problems, the present technical solution provides an AC / DC integrated distribution box.

[0005] To achieve the above purpose, the technical solution is as follows:

[0006] An AC / DC integrated distribution box comprises a box body, an AC cabinet is arranged at the upper end of the box body, a plurality of cable glands for input or output are arranged at the upper end of the AC cabinet, a DC cabinet is arranged at the lower end of the box body, a plurality of cable glands for input or output are also arranged at the lower end of the DC cabinet.

[0007] In some embodiments, a surge protector FS is provided in the AC cabinet, the surge protector FS is connected to a protective circuit breaker QFS, the surge protector FS is connected to a main circuit breaker QF, the main circuit breaker QF is provided with a plurality of branch circuit breakers, and the branch circuit breakers are connected to the cable gland through wiring terminals.

[0008] In some embodiments, a main circuit breaker 2QF1 is provided in the DC cabinet, and the main circuit breaker 2QF1 is provided with a plurality of branch circuit breakers, and the branch circuit breakers are connected to the cable gland through wiring terminals.

[0009] In some embodiments, the main circuit breaker QF includes a circuit breaker base, and the circuit breaker base is detachably connected to the circuit breaker.

[0010] In some embodiments, a plurality of indicator lights are provided in the AC cabinet.

[0011] In some embodiments, the box body is provided with a transparent baffle, and the transparent baffle is provided with a handle.

[0012] Generally, the integrated AC / DC distribution box in the prior art arranges the AC and DC circuits in the front and back of the distribution box, that is, the front half of the distribution box is the DC circuit, and the back half is the AC circuit, or vice versa. The distribution box designed by this method is deep, and sufficient space needs to be reserved in front and behind the distribution box for operation and maintenance. It cannot be installed against a wall or on a wall, and a large amount of space is wasted. It is also more troublesome to operate in the front and back.

[0013] In view of the above problems, the main technical problems solved by the present invention are as follows:

[0014] The present application structurally integrates the above-mentioned AC and DC power supplies and two distribution boxes into a universal AC and DC distribution box; the AC and DC circuits are arranged in an upper and lower layout in the distribution box; and the AC and DC circuits are strictly separated; the upper half of the input and output lines are top-in and top-out, and the lower half of the input and output lines are bottom-in and bottom-out; while effectively solving the above-mentioned problems, it also prevents the AC and DC wiring from being cross-connected, and does not interfere with each other's signals, and a series of other problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0016] Figure 1 This is a schematic diagram of the cabinet structure of the utility model embodiment Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the cabinet structure of the utility model embodiment Figure 2 ;

[0018] Figure 3 It is a schematic diagram of the electrical structure of an embodiment of the utility model. DETAILED DESCRIPTION

[0019] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Please refer to Figure 1-3 As shown, an AC / DC integrated distribution box includes a box body, an AC cabinet is provided at the upper end of the box body, and a plurality of cable glands 1 for input or output are provided at the upper end of the AC cabinet, and a DC cabinet is provided at the lower end of the box body, and a plurality of cable glands 1 for input or output are also provided at the lower end of the DC cabinet.

[0021] In this embodiment, a surge protector FS is provided in the AC cabinet, the surge protector FS is connected to a protective circuit breaker QFS, the surge protector FS is connected to a main circuit breaker QF, the main circuit breaker QF is provided with a plurality of branch circuit breakers, and the branch circuit breakers are connected to the cable gland 1 through a terminal 2.

[0022] In this embodiment, a main circuit breaker 2QF1 is provided in the DC cabinet, and the main circuit breaker 2QF1 is provided with a plurality of branch circuit breakers, and the branch circuit breakers are connected to the cable gland 1 through the connection terminal 2 .

[0023] In this embodiment, the main circuit breaker QF includes a circuit breaker base 3 , and the circuit breaker base 3 is detachably connected to a circuit breaker 4 .

[0024] In this embodiment, a plurality of indicator lights are provided in the AC cabinet.

[0025] Technical solution:

[0026] An AC / DC integrated distribution box is generally composed of the following two parts: 1. A standard fixed cabinet part, 2. An electrical part for wiring electrical components;

[0027] Standard fixed cabinet parts:

[0028] The box body adopts a high-strength fully enclosed structure, and uses the bending and welding process of steel plates to make a wall-mounted metal box with a length*width*height of 500*200*880mm. The primary components corresponding to the AC devices: miniature circuit breakers, miniature circuit breaker bases, surge protectors SPD (FS), primary wiring terminals (JM) and zero and grounding components are installed in the upper part of the AC compartment of the box according to the plane layout of the box; the primary components corresponding to the DC devices: molded case circuit breakers, miniature circuit breakers, primary wiring terminals (ZM) and ground bar, according to the plan layout of the box, are installed in the DC compartment in the lower half of the box; the AC compartment and the DC compartment are completely separated by a metal partition, and the two compartments are each equipped with a door that can be opened separately; the top plate of the upper compartment is installed with a cable gland for the cable inlet and outlet of the AC circuit; the bottom plate of the lower compartment is also installed with a cable gland for the cable inlet and outlet of the DC circuit; finally, the internal electrical components of the two compartments are connected in accordance with their respective wiring diagrams and relevant standards. The primary cable wiring and control circuit wiring of the components are completed to form an AC / DC integrated distribution box.

[0029] The AC and DC parts inside the box are equipped with transparent insulating partitions to prevent maintenance personnel from accidentally touching the live parts inside the box; the insulating partition is provided with a hole for exposing the operating handle of the circuit breaker; the operator can see the working conditions of the internal devices through the partition, and it can also prevent the operator from accidentally entering the live gap, which increases the safety of operation; the four corners of the partition are provided with fixed round holes with a diameter of 8.5mm, and the insulating partition is fixed with 4 M6 captive screws. The advantage of this screw is that even if the screw and nut are loosened, the screw and nut will not fall off, which ensures the convenience of maintenance to the greatest extent; the box is equipped with glands for the incoming and outgoing cables at the top and bottom, which make the cables waterproof and fixed when entering and leaving the box; the four corners and the middle position of the distribution box are welded with hanging ears, and the distribution box can be fixed to the wall or shelf by passing the bolts through the hanging ears;

[0030] Electrical part of electrical device wiring:

[0031] The electrical components inside the entire metal box are separated into the two compartments mentioned above. The upper part of the distribution box is 500mm high, and the AC compartment. Because the upper input and output are adopted, the feeder switch and the terminal are arranged close to the cable gland, and the incoming line switch is arranged at the lower end of the feeder switch. This method can adapt to this cabinet type to the greatest extent, which can not only save the length of the user's wiring extending into the distribution box, but also facilitate the user's wiring;

[0032] The corresponding electrical components are connected in series with the national standard wire according to the primary system diagram, and then connected in parallel on the output side of the incoming switch. The SPD mainly prevents lightning shocks and induced high voltages from causing insulation breakdown on the load, which may lead to component failure and damage. Three-phase signal lights (HY, HG, HR) are connected on the incoming side of the incoming switch QF, which makes it easier for maintenance personnel to understand the energization status of each phase of the incoming cable ABC of the box, and facilitates operators to quickly judge and repair faults.

[0033] The lower part of the distribution box is a 380mm high DC compartment. Because the AC and DC compartments are sealed with metal partitions, the DC cables are all connected from the bottom. Considering the convenience of DC in and out of the distribution box, the feeder switches and terminals are arranged near the bottom of the cable gland. The incoming switch 2QF1 is arranged at the upper end of the feeder switches 2QF2~7. The incoming switch is arranged and fixed horizontally, which can meet the requirement of sufficient wiring space while minimizing the space of the DC compartment.

[0034] Considering that DC has only positive and negative poles, the switch only needs to disconnect the DC circuit to disconnect the entire circuit; therefore, feeder switches are all single-pole DC-specific miniature circuit breakers; when the incoming current is large, a DC-specific molded case switch is used. Molded case switches are generally three-pole products. In order to fully utilize the value of the molded case switch and achieve the purpose of small current disconnecting large current, the three-pole incoming switch is used as a single pole, and the capacity of the switch is increased by connecting three poles in parallel; theoretically, the rated current after the three poles are connected in parallel can reach three times the single-pole rated current, but because the contact resistance of the molded case circuit breaker is not exactly the same, the current will not be averaged, so it is reasonable to use about twice the single-pole rated point current; this design is to connect the 250A / 3P molded case circuit breaker in parallel with three poles and use it as a 500A / 1P switch, so it can reduce user costs while not increasing the size of the distribution box due to the use of high-current switches;

[0035] Both DC miniature circuit breakers and DC molded case switches are equipped with corresponding shunt releases, which can achieve the function of remote tripping. The power supply of the shunt release circuit can be taken from the DC power of this compartment, or the AC power of the upper compartment; in order to make the tripping power supply more reliable, it is most reasonable to take the AC power of the upper compartment, because the AC operating power supply is another independent and reliable system, which can avoid the voltage reduction when the DC system fails or short-circuits, and the purpose of tripping cannot be achieved. This fully reflects the value of the complementary functions of AC and DC low-voltage distribution boxes; similarly, if the upper AC compartment needs to operate the power supply, it can also remove the DC power, which will be more reliable than taking the AC power of this compartment;

[0036] The technical effect of this scheme is

[0037] First, compared with the traditional AC distribution box and DC distribution box that are designed separately, this distribution box can integrate them into one, saving the number of distribution boxes. In addition, this AC and DC circuit adopts an up-and-down layout, which can be shallower than the traditional front-to-back AC and DC distribution box, and theoretically can be at least twice as thin; and this up-and-down layout distribution box can be installed against the wall or hung on the wall. Maintenance personnel only need to operate in front of the box to inspect and operate the entire distribution box, which can save an operating surface space; it maximizes the use of the limited space of the distribution cabinet, and at the same time saves users the installation space and operation space of the distribution room, which can alleviate the current situation of high prices and tight land resources in cities;

[0038] Second, this solution installs the AC and DC circuits separately in separate compartments and physically isolates them, avoiding mutual interference between the AC and DC signals and the risk of a total power outage due to a failure in one of the circuits. At the same time, the operating power of the AC and DC circuits can be powered by each other, making full use of the complementary functions of the AC and DC circuit components and fully ensuring the reliability of the operating power supply.

[0039] Thirdly, this solution and the layout of components in the box also save the manufacturing and processing costs of the distribution box to the greatest extent, such as saving non-ferrous metal resources such as copper and steel; and the AC / DC integrated distribution box, while fully meeting the functions of AC operation circuit and DC operation circuit, also greatly shortens the processing time of the cabinet and speeds up the product delivery; it also greatly improves the work efficiency of operators and maintenance personnel

[0040] In this embodiment, the box body is provided with a transparent baffle 5 , and the transparent baffle 5 is provided with a handle 6 .

[0041] The above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application. Other principles and basic structures that are the same or similar to those of the present application are within the protection scope of the present application.

Claims

1. An AC / DC integrated distribution box, characterized in that: The invention comprises a box body, wherein an AC cabinet is arranged at the upper end of the box body, wherein a plurality of cable glands (1) for input or output are arranged at the upper end of the AC cabinet, and a DC cabinet is arranged at the lower end of the box body, wherein a plurality of cable glands (1) for input or output are also arranged at the lower end of the DC cabinet.

2. The AC / DC integrated distribution box according to claim 1, characterized in that: The AC cabinet is provided with a surge protector FS, the surge protector FS is connected to a protective circuit breaker QFS, the surge protector FS is connected to a main circuit breaker QF, the main circuit breaker QF is provided with a plurality of branch circuit breakers, and the branch circuit breakers are connected to the cable gland (1) via a wiring terminal (2).

3. The AC / DC integrated distribution box according to claim 2, characterized in that: The DC cabinet is provided with a main circuit breaker 2QF1, and the main circuit breaker 2QF1 is provided with a plurality of branch circuit breakers, and the branch circuit breakers are connected to the cable gland (1) via a connection terminal (2).

4. The AC / DC integrated distribution box according to claim 3, characterized in that: The main circuit breaker QF comprises a circuit breaker base (3), and the circuit breaker base (3) is detachably connected to a circuit breaker (4).

5. The AC / DC integrated distribution box according to claim 2, characterized in that: A plurality of indicator lights are arranged in the AC cabinet.

6. The AC / DC integrated distribution box according to claim 2, characterized in that: The box body is provided with a transparent baffle (5), and the transparent baffle (5) is provided with a handle (6).

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