Nine-core power transmission bus and plug-in box

Abstract

The utility model provides a kind of nine-core power transmission bus and plug-in box. Including crossbeam, the multiple junction plugs of fixed installation are installed on the crossbeam, the junction plug includes shell, first interface, second interface and connecting block, the connecting block is fixedly installed in the inside of shell, the multiple junction terminals of fixed installation are installed on the connecting block, the inside of the first interface and second interface is provided with multiple junction posts, the connecting block is provided with two, each connecting block is electrically connected by the junction terminal of one through conducting block, the first interface and second interface correspond one connecting block respectively, the junction post in the first interface and the junction terminal on one connecting block are electrically connected by first wire one by one, the junction post in the second interface and the junction terminal on one connecting block are electrically connected by first wire one by one, satisfy the compact power transmission demand of high-density data center in situ replacement.

Description

Technical Field

[0001] This utility model relates to the field of plug-in box technology, and in particular to a nine-core power transmission busbar and plug-in box. Background Technology

[0002] The current trend is that existing data centers will upgrade to liquid cooling within the next five years. The best replacement process for liquid-cooled cabinets is in-situ replacement, which means not changing the usual layout, i.e., 8 cabinets per row. Assuming 125A per cabinet, that's 1000A, and considering some redundancy, it's 1250A.

[0003] Because the busbars and junction boxes of this specification are large in size, and the double busbar cabinet is installed on the top, with a junction box required every 600mm, it is difficult for the existing busbar system to make effective use of this space. Even if it is installed, the inspection and maintenance will be difficult because the junction boxes of the two busbars are located in front of each other or vertically.

[0004] Therefore, technical personnel in related industries believe that this issue should be taken into account when designing this cabinet, and that a dedicated nine-core copper busbar system is necessary to adapt to the evolving needs of data center infrastructure that is now focused on AI computing. Utility Model Content

[0005] The purpose of this utility model is to provide a nine-core power transmission bus and a plug-in box to solve the problems existing in the prior art.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A nine-core power transmission busbar and a plug box include a crossbeam on which multiple connectors are fixedly mounted. Each connector includes a housing, a first interface, a second interface, and a connecting block. The connecting block is fixedly mounted inside the housing and has multiple terminals fixedly mounted on it. Both the first and second interfaces have multiple terminals inside. There are two connecting blocks, and each connecting block has a terminal electrically connected to a conductive block. The first and second interfaces each correspond to one connecting block. The terminals in the first interface are electrically connected to the terminals on a connecting block in a one-to-one correspondence via a first wire, and the terminals in the second interface are electrically connected to the terminals on a connecting block in a one-to-one correspondence via a first wire.

[0007] By adopting the above technical solution, the first interface and the second interface enable the plug box of this structure to be connected to dual power supplies, thus meeting the needs of line modification.

[0008] In a further embodiment, each of the four bottom corners of the outer casing is fixedly installed with a downwardly extending L-shaped rod. The L-shaped rod includes an integrally formed first straight edge and a second straight edge. The first straight edge is vertically arranged and fixedly connected to the outer casing. The second straight edge is located at the bottom of the first straight edge, and the bottom end face of the first straight edge is located below the bottom end face of the outer casing. The front and rear sides of the crossbeam are provided with through slots. One end of each of the four second straight edges is located in the slot. The L-shaped rod is used to cooperate with the slots to fix the outer casing to the top of the crossbeam.

[0009] By adopting the above technical solution, the snap-fit ​​method makes the shell easier to install and adjust its position.

[0010] In a further embodiment, a nine-core power transmission busbar is fixedly installed inside the crossbeam, and four connecting wires are fixedly installed at the bottom of each connecting block. One end of each connecting wire is electrically connected to a corresponding terminal block. One end of the first conductor is electrically connected to two terminals, and the other end of the first conductor is electrically connected to one core of the nine-core power transmission busbar.

[0011] By adopting the above technical solution, the nine cores of the nine-core transmission bus are named AN, AL1, AL2, AL3, GND, BN, BL1, BL2 and BL3 respectively. GND is electrically connected to the first conductor. The four connecting lines on one connecting block are connected to AN, AL1, AL2 and AL3 respectively, and the four connecting lines on another connecting block are connected to BN, BL1, BL2 and BL3 respectively, thereby realizing the circuit modification.

[0012] In a further embodiment, the beam is hollow inside, and the inner wall of the beam is provided with an insulating layer.

[0013] Because of the large load, the above technical solution requires insulation treatment. The best solution is to use insulating material for the entire beam.

[0014] In summary, this utility model has the following beneficial effects: 1. The first and second interfaces enable the plug-in box of this structure to be connected to dual power supplies, thus meeting the needs of circuit modification. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the nine-core power transmission bus of this utility model.

[0016] In the diagram, 1 is the crossbeam; 2 is the connector plug; 21 is the outer casing; 22 is the first interface; 23 is the second interface; and 24 is the connecting block. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings.

[0018] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1 In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0019] Example 1: like Figures 1-2As shown, a nine-core power transmission busbar and a plug box include a crossbeam 1, on which multiple connectors 2 are fixedly installed. Each connector 2 includes a housing 21, a first interface 22, a second interface 23, and a connecting block 24. The connecting block 24 is fixedly installed inside the housing 21 and has multiple terminals fixedly installed on it. Both the first interface 22 and the second interface 23 have multiple terminals inside. There are two connecting blocks 24, each with a terminal electrically connected via a conductive block. The first interface 22 and the second interface 23 each correspond to one connecting block 24. The terminals in the first interface 22 are electrically connected to the terminals on one connecting block 24 via wires, and the terminals in the second interface 23 are electrically connected to the terminals on one connecting block 24 via first conductors. The four corners of the bottom of the housing 21 are fixedly installed with... The crossbeam 1 has downward-extending L-shaped rods, each comprising an integrally formed first straight edge and second straight edge. The first straight edge is vertically positioned and fixedly connected to the outer casing 21. The second straight edge is located at the bottom of the first straight edge, with its bottom surface below the bottom surface of the outer casing 21. The front and rear sides of the crossbeam 1 are provided with through-slots, and one end of each of the four second straight edges is located within these slots. The L-shaped rods are used to engage with the slots to fix the outer casing 21 to the top of the crossbeam 1. A nine-core power transmission busbar is fixedly installed inside the crossbeam 1. Four connecting wires are fixedly installed at the bottom of each connecting block 24. One end of each connecting wire is electrically connected to a corresponding terminal. One end of the first conductor is electrically connected to two terminals, and the other end of the first conductor is electrically connected to one core of the nine-core power transmission busbar. The crossbeam 1 is hollow inside, and its inner wall is provided with an insulating layer.

[0020] Specific implementation process: The first and second interfaces enable the plug-in box of this structure to be connected to dual power supplies, meeting the needs of line modification.

[0021] Example 2: This utility model relates to the field of power transmission technology for high-energy-density data centers, and in particular to a nine-core power transmission busbar with a shared ground and a shared housing, its matching dual-power plug-in box, and the characteristics of the compact spatial structure of the combination of the busbar and the plug-in box with a 19-inch server rack, as well as the connection characteristics between the combination and the internal electrical system access interface of the rack. Using this solution, the required rack height is minimized (≤565mm), and the design is extremely simple—due to the inherent structural characteristics of the busbar trunking, optical cables and communication cables can be laid in the upward-opening through-channel space, while sampling tubes for an early-stage electrical fire alarm system are laid in the downward-opening through-channel space using a double-bridge support structure.

[0022] The nine-core transmission busbar with a shared ground and shell is characterized by housing nine copper busbars in parallel within a non-magnetic metal cavity (which serves as both shielding and structural support; the cavity itself has an independent grounding point and is not conductively connected to the ground busbar within the cavity). The outermost two sides are separate zero-level busbars, the center is a shared ground busbar, and three parallel phase busbars are distributed on each side of the ground busbar. The copper busbars are insulated from each other by a completely encased insulating material. Based on structural calculations, non-conductive internal supports are installed or omitted as supports and fixtures to prevent potential overall inductive and capacitive changes due to vibration. Temperature and humidity sensors can be optionally installed on these supports, and 3A molecular sieves (approximately 0.3 nm pore size) are embedded in the compartments of the supports at both ends of each busbar section to prevent external humidity changes from affecting the humidity within the busbar cavity. The connection between this busbar and the upstream busbar can be selected at either end; power supply A can be connected to five of the busbars at the left end of the nine-core busbar, while power supply B can be connected at the right end. Alternatively, it can be connected to the upstream nine-core busbar at a single end via a T-shaped or L-shaped connector. The 9-core busbar trunking installed at the top of the server rack for power supply should have one socket every 600mm. Therefore, the length of the busbar trunking providing these sockets should preferably be 300mm as the length module, meaning 900 (600+300)mm at both ends of the total length – the extra 300mm is used for connection sections with the upper-level busbar. At the top of the rack, 600mm, 1200mm, 1800mm, and 2400mm can be used, but considering indoor transportation, the longest should not exceed 3000mm. If a 300mm wide CDU or an inter-row HVAC terminal (referred to as a HVAC cabinet) appears in a row of racks, breaking the 600mm rack width module, a 900mm double-sided socket busbar should be used to supply power to the 600mm wide 19-inch server rack and the 300mm wide HVAC cabinet respectively. The sockets can be installed on both sides of the busbar to accommodate the different wiring requirements of different racks. The power supply for this busbar should ideally consist of two different UPS systems housed in a single UPS room (with their upstream power sources preferably from two different 220kV substations) to achieve true heterogeneous power sources. Furthermore, since the output sides of these two UPS systems share the same grounding down conductor within the same room, they can operate on a common ground. The upstream power distribution for these two UPS systems should employ a continuous zero-shutdown device based on industrial automation monitoring to ensure the effectiveness of the incoming power supply.

[0023] The dual power supply junction box connects to the sockets of the 9-core busbar trunking via a 9-pin plug assembly. As a standard power supply interface, this junction box (operating surface width ≤ 265mm, height ≤ 325mm) enables the 9-core busbar trunking to provide redundant AB power to high-energy-density 19-inch server racks. The junction box and the 9-core busbar trunking are connected using plugs and sockets with corresponding electrical connections, ensuring that the connection point maintains the same IP protection rating as the busbar trunking itself. Inside the junction box, two appropriate sets of molded case circuit breakers are selected based on the power requirements of the rack being served, serving as protection devices for the redundant AB outgoing cables. For 600mm wide server racks, multi-functional molded case circuit breakers are recommended; for 300mm HVAC racks, miniature molded case circuit breakers can be used. The molded case circuit breaker is mounted on a mounting support plate inside the enclosure. A through-plate connector is used to transfer the equipotential bonding point of its incoming line to the other side of the mounting support plate, where it connects to the plug of the socket box. The neutral wire (for a 3P circuit breaker) and ground wire are connected via flexible connecting cables matching the rated current strength. The outgoing lines should be connected using flexible cables (such as ZRVV or TRVV) with a small bending radius (6 times the outer diameter), depending on the cable's current carrying capacity. This small bending radius effectively reduces the overall system's height requirements and simplifies maintenance. Cables not passing through the circuit breaker are connected to the aforementioned flexible connecting cables at the same potential using cage-type (or screw-type) terminals with corresponding withstand voltage, rated current, and wire diameter. For the ground wire, a terminal not connected to the enclosure can be selected according to the design institute's requirements to achieve floating ground. Waterproof and flame-retardant glands are used as protective measures when the outgoing cables exit the plug-in box. If sensors are installed in the connected 9-core busbar trunking, a corresponding I / O gateway (PT100, 4~20mA) should be installed in the plug-in box to package the sensor signals and send them to the upper-level convergence equipment via a communication link. This link uses ZRVSP4*1.0 cable and is laid in a daisy-chain manner (using Modbus RTU communication) in the upward-facing through-slot of the busbar trunking. A non-magnetic metal cover can be installed in this through-slot to protect the cables inside. On the front of the plug-in box, the simplest configuration is two manual cabinet door operating handles (also known as extended rotary handles) (corresponding to the A and B circuit breakers), or an electric operating handle can be installed as needed. The selected multi-functional molded case circuit breaker should preferably be equipped with auxiliary contacts, but not with shunt trip units. If an electric operating handle and auxiliary contacts are installed, they should be connected to the aforementioned I / O gateway at the DI and DO points. For those choosing to install an electric control unit, a multi-functional industrial HMI can be mounted on the surface of the plug-in box to manage sensor and circuit breaker status through a single interface, while maintaining connectivity with the SCADA system via an Ethernet link—this also provides a clear display of the current status during inspections, thereby improving on-site efficiency.

[0024] The assembly consisting of a 9-core busbar and a dual power supply junction box is connected to the cabinet via a lightweight, non-magnetic metal double-bridge structure (height ≤ 385mm) mounted on the top of the cabinet. The assembly and the double-bridge structure are connected by a combination of dedicated clips and A2-70 M8×16 fasteners via the lower wing plate of the busbar housing. Four sets of these fasteners are used on each cabinet top, one set at each of the four different contact points between the housing wing plate and the double-bridge structure. M8 flange nuts with metal inserts of the same material as the bolts are recommended to prevent loosening due to accumulated cabinet vibration. The double-bridge structure is connected to the cabinet via the eye bolt holes located on the top of the cabinet body, using A2-70 M12 (i.e., the same specification as the cabinet eye bolts) ×16 socket head cap bolts with copper washers. The simplest cross-section of this double-bridge structure is a 40×40×4 angle profile, while the part in contact with the cabinet uses a 40×75×5 sheet of the same material (as its bottom surface). The sheet and the angle profile are connected by argon arc welding. This welding requires the assistance of tooling fixtures to ensure that the four sheet materials are on the same plane, and that the corresponding parts of the angle profiles of the double bridges are of equal length and parallel. A connecting beam (selectively the same 40×40×4 angle profile) can be welded (or bolted) to the top surface of the double-bridge structure. If the connecting beam is welded, tooling fixtures must also be used to ensure that the double bridge facades are parallel and perpendicular to the bottom sheet material after welding. If bolting is used, it is advisable to use an A2-70 M6×16 flange cup head hexagonal socket + metal insert flange nut as the fastener.

[0025] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be 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 disclosed in this utility model according to the specific circumstances.

[0026] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Images