Rectifying and direct current integrated cabinet

Abstract

The utility model discloses a rectification direct current integrated cabinet, including the cabinet body and the accommodation in the cabinet body's alternating current input unit, rectification unit and direct current unit, direct current unit is located rectification unit top, alternating current input unit is located rectification unit and direct current unit same side and is adjacent to the side plate of cabinet body, alternating current input unit extends from rectification unit bottom to direct current unit top, alternating current input unit input end is connected with external alternating current source electricity, rectification unit input end is connected with alternating current input unit output end electricity, rectification unit output end is connected with direct current unit input end electricity, direct current unit output end is connected with external load equipment electricity. The rectification direct current integrated cabinet above, direct current unit and alternating current input unit separate setting, can avoid because two mixed distribution causes electric shock accident, fire risk and equipment damage and failure risk, improved rectification direct current integrated cabinet's security and protection level, the compact layout in the cabinet body, the number of accommodated rectification module increases, has increased power capacity.

Description

Technical Field

[0001] This utility model relates to the field of power supply technology, and in particular to a rectifier-DC integrated cabinet. Background Technology

[0002] A rectifier-DC integrated cabinet is a comprehensive power supply cabinet that integrates AC power distribution, rectifier modules, DC power distribution, battery access, and monitoring and management units. It provides stable, reliable, and uninterrupted DC power to communication equipment such as BBUs (baseband processing units), transmission equipment, and RRUs (remote radio frequency units). With the increasing use of rectifier-DC integrated cabinets, the demands for capacity and product reliability are rising. However, the internal layout of current rectifier-DC integrated cabinets on the market is relatively loose. Given a fixed internal space, the large spacing between rectifier modules limits the number of modules that can be accommodated, thus restricting the power capacity of the cabinet. Furthermore, the existing rectifier-DC integrated cabinets have a mixed distribution of DC and AC sections, lacking strict physical isolation. This makes it easy for maintenance personnel to accidentally touch high-voltage AC sections during operation, leading to electric shock accidents. It also poses a fire risk if the AC power line insulation is damaged, causing an AC-to-ground short circuit. Moreover, it easily leads to equipment damage and system failure risks, resulting in insufficient safety and protection levels for rectifier-DC integrated cabinets. Utility Model Content

[0003] Therefore, it is necessary to provide a compact, highly protected, and highly safe integrated rectifier-DC cabinet to address the above-mentioned shortcomings.

[0004] A rectifier-DC integrated cabinet includes a cabinet body and an AC input unit, a rectifier unit, and a DC unit housed within the cabinet body. The DC unit is located above the rectifier unit. The AC input unit is located on the same side of the rectifier unit and the DC unit and adjacent to the side panel of the cabinet body. The AC input unit extends from the bottom of the rectifier unit to the top of the DC unit. The input terminal of the AC input unit is electrically connected to an external AC power supply. The input terminal of the rectifier unit is electrically connected to the output terminal of the AC input unit. The output terminal of the rectifier unit is electrically connected to the input terminal of the DC unit. The output terminal of the DC unit is electrically connected to an external load device.

[0005] In one embodiment, the AC input unit includes a molded case circuit breaker electrically connected to an external AC power source, a vertical AC busbar electrically connected to the molded case circuit breaker and extending in a vertical direction, and an input busbar electrically connected to the vertical AC busbar. The vertical AC busbar is adjacent to the side panel of the cabinet, and the molded case circuit breaker is located between the vertical AC busbar and the rectifier unit.

[0006] In one embodiment, the vertical AC busbar includes three AC busbars arranged side by side at intervals in the horizontal direction and all extending in the vertical direction. The AC input unit includes three molded case circuit breakers that are electrically connected to the input terminals of each AC busbar. The three molded case circuit breakers are arranged sequentially in the vertical direction.

[0007] In one embodiment, the rectifier unit includes 3N rectifier modules arranged in an array below the DC unit. Each rectifier module is electrically connected to the input bus. Each molded case circuit breaker controls N rectifier modules, and each rectifier module has a module switch at its output terminal. In one embodiment, the DC unit includes a DC busbar disposed above the rectifier unit and extending horizontally, the DC busbar being electrically connected to the output terminal of each of the rectifier modules.

[0008] In one embodiment, each of the rectifier modules is provided with an output terminal, and the output terminal is connected to the DC bus via an output cable.

[0009] In one embodiment, the DC unit further includes a battery fuse electrically connected to the battery pack and a load fuse electrically connected to the load, the battery fuse and the load fuse being electrically connected to the DC busbar respectively.

[0010] In one embodiment, the integrated rectifier-DC cabinet further includes a monitoring unit housed within the cabinet. The monitoring unit includes a main monitoring device, a power distribution monitoring device, and an insulation monitor. The main monitoring device is electrically connected to the molded case circuit breaker and each rectifier module. The power distribution monitoring device is electrically connected to the battery fuse, the load fuse, the DC busbar, and the main monitoring device. The insulation monitor is installed on the connection line between the load fuse and the DC busbar, and the insulation monitor is connected to the power distribution monitoring device via a CAN communication line.

[0011] In one embodiment, the monitoring unit further includes a leakage current sensor electrically connected to the DC bus and the load fuse, respectively.

[0012] In one embodiment, the monitoring unit further includes a current transformer disposed on the connection line between the leakage current sensor and the DC bus.

[0013] The rectifier-DC integrated cabinet of this utility model places the AC input unit on the same side of the rectifier unit and the DC unit, and extends the AC input unit from the bottom of the rectifier unit to the top of the DC unit. This offsets the rectifier unit and the AC input unit along the length of the cabinet, making reasonable use of the space along the length of the cabinet and allowing the rectifier unit to effectively dissipate heat. The separate placement of the DC unit and the AC input unit provides clear functional zoning, avoiding the risks of electric shock, fire, equipment damage, and malfunctions caused by the mixed distribution of DC and AC input units. This improves the safety, reliability, and protection level of the rectifier-DC integrated cabinet. The components of the AC input unit are located near the side panel of the cabinet and are centrally arranged, which shortens the connection path of the components within the AC input unit and saves copper busbar usage. Placing the DC unit above the rectifier unit further shortens the connection path between the rectifier unit and the DC unit, resulting in simple wiring and a compact internal layout. A larger number of rectifier modules can be accommodated in a single cabinet, effectively increasing the power capacity of the rectifier-DC integrated cabinet. Attached Figure Description

[0014] Figure 1 This is a front view of the integrated rectifier-DC cabinet after the front door of the cabinet has been removed in one embodiment of the present invention; Figure 2 This is a rear view of the integrated rectifier-DC cabinet after the cabinet door has been removed in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the integrated rectifier-DC cabinet after opening each door panel in one embodiment of the present invention. Figure 4 This is a schematic diagram of the structure of the integrated rectifier-DC cabinet after removing part of the cabinet door panel in one embodiment of the present invention; Figure 5 This is a circuit diagram of a rectifier-DC integrated cabinet in one embodiment of the present invention. Detailed Implementation

[0015] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0016] Please see Figure 1This utility model discloses a compact, highly protected, and highly safe integrated rectifier-DC cabinet. The integrated rectifier-DC cabinet includes a cabinet 100 and an AC input unit 200, a rectifier unit 300, and a DC unit 400 housed within the cabinet 100. The DC unit 400 is located above the rectifier unit 300. The AC input unit 200 is located on the same side of the rectifier unit 300 and the DC unit 400 and is adjacent to the side plate 120 of the cabinet 100. The AC input unit 200 extends from the bottom of the rectifier unit 300 to the top of the DC unit 400. The input terminal of the AC input unit 200 is electrically connected to an external AC power supply. The input terminal of the rectifier unit 300 is electrically connected to the output terminal of the AC input unit 200. The output terminal of the rectifier unit 300 is electrically connected to the input terminal of the DC unit 400. The output terminal of the DC unit 400 is electrically connected to an external load device. The AC input unit 200 is used to enable AC power input to the rectifier-DC integrated cabinet and distribute the power to the rectifier unit 300. The rectifier unit 300 is used to convert AC power into DC power. The DC unit 400 is used to transmit the DC power converted by the rectifier unit 300 to the load equipment (such as communication equipment) for power supply. At the same time, the DC power is stored in the battery pack so that when the external power supply is interrupted, the load equipment can be powered through the battery pack to ensure the continuous operation of the load equipment.

[0017] The aforementioned integrated rectifier-DC cabinet places the AC input unit 200 on the same side as the rectifier unit 300 and the DC unit 400, with the AC input unit 200 extending from the bottom of the rectifier unit 300 to the top of the DC unit 400. This offsets the rectifier unit 300 and the AC input unit 200 along the length of the cabinet 100, making efficient use of the space along the cabinet 100 and allowing for effective heat dissipation for the rectifier unit 300. The separate placement of the DC unit 400 and the AC input unit 200 provides clear functional zoning, avoiding electric shock accidents, fire risks, and equipment damage caused by the mixed distribution of the DC unit 400 and the AC input unit 200. This reduces the risk of failure and improves the safety, reliability, and protection level of the rectifier-DC integrated cabinet. The components of the AC input unit 200 are arranged and concentrated near the side panel 120 of the cabinet 100, which shortens the connection path of each component in the AC input unit 200 and saves copper busbar usage. The DC unit 400 is placed above the rectifier unit 300, which shortens the connection path between the rectifier unit 300 and the DC unit 400. This makes the wiring of the entire rectifier-DC integrated cabinet simple, the layout inside the cabinet 100 compact, and the number of rectifier modules of the rectifier unit 300 that can be accommodated in a single cabinet 100, which can effectively increase the power capacity of the rectifier-DC integrated cabinet.

[0018] Please see Figure 3In this embodiment, the cabinet 100 includes a frame 110 that can form a rectangular space, two side panels 120 disposed opposite to each other on both sides of the frame 110, a front door 130 installed on the front side of the frame 110, and a rear door 140 installed on the rear side of the frame 110. The side panels 120 are fixed to the side of the frame 110 by screws or welding, or can be installed on the frame 110 by hinges, forming an openable channel on the side of the frame 110 to allow for disassembly, assembly, or maintenance of the internal components of the cabinet 100 from the side. The front door 130 includes two front door panels disposed opposite to each other on the front side of the frame 110, the mating parts of the two front door panels are connected by a door lock, and the parts of the two front door panels away from the door lock are hinged to the frame 110; the rear door 140 includes two rear door panels disposed opposite to each other on the rear side of the frame 110, the mating parts of the two rear door panels are connected by a door lock, and the parts of the two rear door panels away from the door lock are hinged to the frame 110. In this way, dividing the front door 130 into two opposing front door panels and the rear door 140 into two opposing rear door panels reduces the space occupied by the front door 130 and the rear door 140 when they are opened and closed. This allows the rectifier-DC integrated cabinet to adapt to the needs of smaller installation spaces. At the same time, operators can disassemble and maintain the internal components of the cabinet 100 from the front and rear sides of the cabinet 100, respectively, to meet the disassembly and maintenance needs of the rectifier-DC integrated cabinet in different installation scenarios. For example, when the front side of the rectifier-DC integrated cabinet is against a wall, maintenance and disassembly can be carried out from the rear or side of the rectifier-DC integrated cabinet. When the rear side of the rectifier-DC integrated cabinet is against a wall, maintenance and disassembly can be carried out from the front or side of the rectifier-DC integrated cabinet. In this embodiment, the front door 130, rear door 140, and side panel 120 of the cabinet 100 are all door panels of the cabinet 100. The frame 110 is also equipped with a limiting support rod 111 to restrict the position of the door panels, preventing them from moving excessively into the interior space of the cabinet 100 during installation or opening / closing, thus avoiding damage to the internal components and ensuring the safety of the rectifier-DC integrated cabinet. The front door 130 is also equipped with operating controls and a display screen electrically connected to the AC input unit, rectifier unit, and DC unit, allowing operators to control the rectifier-DC integrated cabinet and monitor its operation by activating the controls and display screen when the door is closed.

[0019] Please see Figure 4The AC input unit 200 includes a molded case circuit breaker 210 electrically connected to an external AC power supply, a vertical AC busbar 220 electrically connected to the molded case circuit breaker 210 and extending vertically, and an input busbar 230 electrically connected to the vertical AC busbar 220. The vertical AC busbar 220 is adjacent to the side panel 120 of the cabinet, and the molded case circuit breaker 210 is located between the vertical AC busbar 220 and the rectifier unit. That is, the vertical AC busbar 220 and the molded case circuit breaker 210 are located on the same side of the cabinet, and their adjacent positions can reduce the connection path from the vertical AC busbar 220 to the molded case circuit breaker 210, thereby saving the amount of copper busbar used for the overlap between the vertical AC busbar 220 and the molded case circuit breaker 210. In this embodiment, the molded case circuit breaker 210 serves as the main power switch and primary protection for the rectifier-DC integrated cabinet. It connects to external AC power and has overcurrent and short-circuit protection capabilities. It can manually disconnect the power supply to the entire cabinet and provides protection for the entire input line from the external AC power source to the cabinet. Thus, when a severe short-circuit fault occurs in the rectifier module or line inside the cabinet, resulting in a large current, even if the rectifier module's own protection fails, the molded case circuit breaker 210 will trip as the last line of defense, isolating the faulty equipment from the external AC power source (i.e., the power grid) to prevent the accident from escalating and achieving the purpose of fault isolation. The vertical AC busbar 220 serves as the line connecting the AC power to the rectifier unit, while the input busbar 230 efficiently transmits the large current from the vertical AC busbar 220 to the various branches of the rectifier unit from the molded case circuit breaker 210.

[0020] For further details, please refer to Figure 4 The vertical AC busbar 220 includes three AC busbars arranged horizontally at intervals and extending vertically. The AC input unit 200 includes three molded case circuit breakers 210 electrically connected to the input terminals of each AC busbar. The three molded case circuit breakers 210 are arranged sequentially in the vertical direction. Specifically, the three AC busbars are A-phase busbar 221, B-phase busbar 222, and C-phase busbar 223. The three AC busbars share a common input of three-phase AC power. Each AC busbar's input terminal (i.e., AC input) is equipped with a molded case circuit breaker 210 to control and protect the current at that AC busbar. By arranging the three molded case circuit breakers 210 sequentially in the vertical direction, the connection path and overlapping copper busbars between the molded case circuit breakers 210 and the vertical AC busbar 220 are reduced, while the space occupied by the molded case circuit breakers 210 in the cabinet length direction is reduced, thereby improving the utilization rate of the cabinet's internal space and making the cabinet layout more compact.

[0021] Please see Figure 1The rectifier unit 300 includes 3N rectifier modules 310 arranged in an array below the DC unit 400. Each rectifier module 310 is electrically connected to the input bus 230. Each molded case circuit breaker 210 controls N rectifier modules 310, and each rectifier module 310 has a module switch 320 at its output terminal. N is a positive integer. In this embodiment, N is 12. The rectifier unit 300 includes 3 columns and 12 rows arranged in a matrix below the DC unit 400, totaling 36 rectifier modules 310. Each group of 12 rectifier modules 310 is electrically connected to an AC busbar. Specifically, the 36 rectifier modules 310 are divided into three groups of 12: a first group, a second group, and a third group. The 12 rectifier modules 310 in the first group are all electrically connected to the A-phase busbar 221; the 12 rectifier modules 310 in the second group are all electrically connected to the B-phase busbar 222; and the 12 rectifier modules 310 in the third group are all electrically connected to the C-phase busbar 223. The rectifier unit 300 has 36 module switches 320 to enable independent control of each rectifier module 310. In this embodiment, the module switch 320 is a DC air switch. In other embodiments, the module switch 320 can also be a fuse. By setting the module switch 320 at the output end of the rectifier module 310, the output line of the rectifier module 310 itself can be protected, realizing local protection of the rectifier module 310. When it is necessary to maintain or replace a rectifier module 310, its module switch 320 can be disconnected separately without affecting the operation of other modules, realizing maintenance isolation of the rectifier module 310. That is, the module switch 320 realizes secondary protection (or module-level protection) of the rectifier-DC integrated cabinet.

[0022] Please see Figure 1The DC unit 400 includes a DC busbar 410 disposed above the rectifier unit 300 and extending horizontally. The DC busbar 410 is electrically connected to the output terminals of each rectifier module 310. Preferably, in this embodiment, the output terminals of each rectifier module 310 are connected in parallel to the DC busbar 410. The rectifier module 310 is a rectifier that converts AC power to DC power. Each rectifier module 310 works collaboratively to maintain the voltage stability of the DC busbar 410. When the power consumption of the load device increases, the rectifier module 310 automatically increases the output current; when the load decreases, the rectifier module 310 automatically decreases the output current. Regardless of the load change, the rectifier module 310 can ensure that the voltage on the DC busbar 410 remains stable at a set value to provide high-quality power to the downstream devices. In addition, while supplying power to the load device, the rectifier module 310 is also used to charge the battery pack, so that the integrated rectifier-DC cabinet can still supply power to the load device in the event of a mains power outage. Furthermore, each rectifier module 310 is equipped with an output terminal, which is connected to a DC bus 410 via an output cable. The DC bus 410 is equivalent to the main power grid of the power station, used to collect all electrical energy for distribution. In addition, in this embodiment, the DC unit 400 also includes a battery fuse 420 electrically connected to the battery pack and a load fuse 430 electrically connected to the load. The battery fuse 420 and the load fuse 430 are respectively electrically connected to the DC bus 410. In this embodiment, the battery fuse 420 is used to protect the battery charging and discharging circuit to prevent catastrophic accidents, and the load fuse 430 is used to protect each load output connected to the DC bus 410 to achieve fault isolation. That is, the battery fuse 420 and the load fuse 430 are used to provide three-level protection (i.e., system-level protection) for the rectifier-DC integrated cabinet. In this way, when the external AC power supply (mains power) is normally supplied, the rectifier module 310 converts the AC power to DC power. One DC power supply is used to supply power to the load device (such as communication equipment) through the load fuse 430, and the other is used to float charge the battery pack through the battery fuse 420. When the external AC power supply (mains power) is interrupted, the battery pack immediately discharges. The current path is: from the positive terminal of the battery to the battery fuse 420, then into the DC bus, then through the load fuse 430, and finally into the communication equipment. At this time, the battery pack serves as the only power source to ensure that the load continues to operate.

[0023] Please see Figure 1 The rectifier-DC integrated cabinet also includes a monitoring unit housed within the cabinet. The monitoring unit includes a main monitoring device 500 (i.e., Figure 5 The monitoring module M822E), power distribution monitoring equipment 600 (i.e. Figure 5 The power distribution monitoring unit (HDU) and insulation monitoring unit 700 (i.e. Figure 5 Insulation test EGU01L), main monitoring equipment 500 and molded case circuit breaker 210 (i.e. Figure 5 QF1, QF2, QF3) and each rectifier module 310 (i.e. Figure 5 Electrically connected to H1-1~H1-12, H2-1~H2-12, H3-1~H3-12 in the diagram, and the power distribution monitoring equipment 600 is connected to the battery fuse 420 (i.e. Figure 5 (FUB1+~FUB3+ and FUB1-~FUB3-), load fuse 430 (i.e. Figure 5 FUD1+~FUD3+ and FUD1-~FUD3-), DC bus 410 (i.e. Figure 5 The 240Vdc+ and 240Vdc- are electrically connected to the main monitoring equipment 500. The insulation monitoring instrument 700 is installed on the connection line between the load fuse 430 and the DC bus 410, and is connected to the power distribution monitoring equipment 600 via a CAN communication line. Furthermore, the monitoring unit also includes a leakage current sensor 800 (i.e., [missing information]) electrically connected to both the DC bus 410 and the load fuse 430. Figure 5 (T01, T02~T0n in the diagram). In this way, the main monitoring device 500 directly collects information from the molded case circuit breaker 210 and the rectifier module 310 to monitor their operating status. The power distribution monitoring device 600 collects the status information of the load fuse 430, the battery fuse 420, and the voltage information of the DC bus 410, and transmits this DC power distribution information to the main monitoring device 500. Simultaneously, the power distribution monitoring device 600 detects the insulation status of the DC bus 410. If an abnormality is detected, it sends a command to the insulation monitor 700 via CAN. The insulation monitor 700 then uses each leakage current sensor 800 to inspect each output branch to locate the faulty branch. Finally, the insulation monitor 700 uploads the collected fault information to the power distribution monitoring device 600 via the CAN communication line to understand the status of the integrated rectifier-DC cabinet.

[0024] Please see Figure 2 In one embodiment, the monitoring unit further includes a current transformer 900 (i.e., a current transformer 900 disposed on the connection line between the leakage current sensor 800 and the DC bus 410) Figure 5(TA1~Tan in the diagram). Furthermore, the current transformer 900 is electrically connected to the power distribution monitoring equipment. By installing the current transformer 900 on the connection line between the leakage current sensor 800 and the DC bus 410, the current transformer 900 can be used to detect AC current leakage faults in the DC system. For example, when a fault occurs inside the rectifier module 310, when wiring insulation is damaged, when an AC line touches the DC bus 410 or a line, or when transient interference is caused by lightning or operational overvoltage, the current transformer 900 senses and measures the changing current. When AC current enters the DC system, this AC fault current will seek a path to flow to the ground. One important path is through the connection line between the leakage current sensor 800 and the DC bus 410 to the ground. At this time, the current transformer 900 will immediately detect this power frequency AC current. The current transformer 900 further transmits this AC current signal to the power distribution monitoring equipment 600 to realize the detection of AC current leakage faults.

[0025] It should be noted that you should refer to [link / reference]. Figure 1 In this embodiment, the integrated rectifier-DC cabinet has dimensions of 1400mm × 1200mm × 2200mm (length × width × height). It can accommodate three 1600A battery fuses 420 and nine 630A load fuses 430. Each battery fuse 420 includes one positive and one negative fuse, and each load battery fuse 420 includes one positive and one negative fuse. When the load fuses 430 are changed to 800A, the number of 1600A battery fuses 420 and the number of 800A load fuses 430 can be arranged. Each battery fuse 420 includes one positive and one negative fuse, and each load battery fuse 420 includes one positive and one negative fuse.

[0026] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A rectifier-DC integrated cabinet, characterized in that, The device includes a cabinet (100) and an AC input unit (200), a rectifier unit (300), and a DC unit (400) housed within the cabinet (100). The DC unit (400) is located above the rectifier unit (300). The AC input unit (200) is located on the same side of the rectifier unit (300) and the DC unit (400) and adjacent to the side panel (120) of the cabinet (100). The AC input unit (200) extends from the bottom of the rectifier unit (300) to the top of the DC unit (400). The input terminal of the AC input unit (200) is electrically connected to an external AC power source. The input terminal of the rectifier unit (300) is electrically connected to the output terminal of the AC input unit (200). The output terminal of the rectifier unit (300) is electrically connected to the input terminal of the DC unit (400). The output terminal of the DC unit (400) is electrically connected to an external load device.

2. The rectifier-DC integrated cabinet according to claim 1, characterized in that, The AC input unit (200) includes a molded case circuit breaker (210) electrically connected to an external AC power source, a vertical AC busbar (220) electrically connected to the molded case circuit breaker (210) and extending vertically, and an input busbar (230) electrically connected to the vertical AC busbar (220). The vertical AC busbar (220) is adjacent to the side panel (120) of the cabinet (100), and the molded case circuit breaker (210) is located between the vertical AC busbar (220) and the rectifier unit (300).

3. The rectifier-DC integrated cabinet according to claim 2, characterized in that, The vertical AC busbar (220) includes three AC busbars arranged side by side at intervals in the horizontal direction and all extending in the vertical direction. The AC input unit (200) includes three molded case circuit breakers (210) that are electrically connected to the input terminals of each AC busbar. The three molded case circuit breakers (210) are arranged sequentially in the vertical direction.

4. The rectifier-DC integrated cabinet according to claim 3, characterized in that, The rectifier unit (300) includes 3N rectifier modules (310) arranged in an array below the DC unit (400). Each rectifier module (310) is electrically connected to the input bus (230). Each molded case circuit breaker (210) controls N rectifier modules (310) and each rectifier module (310) has a module switch (320) at its output terminal.

5. The rectifier-DC integrated cabinet according to claim 4, characterized in that, The DC unit (400) includes a DC busbar (410) disposed above the rectifier unit (300) and extending horizontally, the DC busbar (410) being electrically connected to the output terminal of each of the rectifier modules (310).

6. The rectifier-DC integrated cabinet according to claim 5, characterized in that, Each of the rectifier modules (310) is provided with an output terminal, and the output terminal is connected to the DC busbar (410) through an output cable.

7. The rectifier-DC integrated cabinet according to claim 5, characterized in that, The DC unit (400) also includes a battery fuse (420) electrically connected to the battery pack and a load fuse (430) electrically connected to the load, wherein the battery fuse (420) and the load fuse (430) are respectively electrically connected to the DC bus (410).

8. The rectifier-DC integrated cabinet according to claim 7, characterized in that, The integrated rectifier-DC cabinet also includes a monitoring unit housed within the cabinet (100). The monitoring unit includes a main monitoring device (500), a power distribution monitoring device (600), and an insulation monitor (700). The main monitoring device (500) is electrically connected to the molded case circuit breaker (210) and each rectifier module (310). The power distribution monitoring device (600) is electrically connected to the battery fuse (420), the load fuse (430), the DC busbar (410), and the main monitoring device (500). The insulation monitor (700) is installed on the connection line between the load fuse (430) and the DC busbar (410), and the insulation monitor (700) is connected to the power distribution monitoring device (600) via a CAN communication line.

9. The rectifier-DC integrated cabinet according to claim 8, characterized in that, The monitoring unit also includes a leakage current sensor (800) that is electrically connected to the DC bus (410) and the load fuse (430) respectively.

10. The rectifier-DC integrated cabinet according to claim 9, characterized in that, The monitoring unit also includes a current transformer (900) installed on the connection line between the leakage current sensor (800) and the DC bus (410).

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