Low-voltage cabinet with separated bus top frame

Abstract

A low-voltage cabinet with a separated bus top frame comprises a cabinet body and a bus top frame which are designed in a split mode, the bus top frame is provided with a copper bar electrically connected with a UPS, the input end of the UPS is connected with a mains supply through the copper bar, and the output end of the UPS is provided with a first connecting end through the copper bar; the cabinet body is provided with a second connecting end electrically connected with the first connecting end, and the cabinet body receives electric energy through the second connecting end and then supplies power to a load through a copper bar, so that the purpose of transmitting the electric energy according to system requirements is achieved, and meanwhile, the safe distance between each group of buses is ensured; the problem that a standard low-voltage cabinet body is not high enough and cannot accommodate more than three groups of horizontal buses after a low-voltage power distribution system has multiple groups of buses is effectively solved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage cabinets, in particular to a low-voltage cabinet with a separated busbar top frame. Background Art

[0002] In the entire power distribution system, due to the existence of some important loads in the primary load (such as: national computing centers, large data / communication centers, financial system computer rooms, dispatching centers and other indoor places), it is often necessary to ensure the continuity and reliability of power supply; the most commonly used method is: two or three independent power supplies to supply power to such loads, one for normal power supply, one for backup power supply, and one for emergency power supply;

[0003] If the common power supply fails and trips, select emergency and backup power supplies of different natures according to the independence of the backup / emergency power supply and the length of time it takes to be put into operation, so as to ensure that the power outage time of the back-end load is as short and controllable as possible; according to relevant standards, particularly important loads in the first-level load are not allowed to be shut down; for example, the loads mentioned in the above examples are mostly of this type, so when selecting emergency power supplies, large-capacity UPS cabinets with built-in batteries are used; UPS cabinets are all online, so when the common or backup power supply fails, the UPS does not need to start up time and is directly put into operation, so the UPS input time is milliseconds or continuous power supply level;

[0004] Because the above-mentioned places need to supply power to particularly important loads among the primary loads, there are more power supplies in the low-voltage distribution system of this place, which makes the connection and power supply of the entire system complicated, especially the increase in the number of busbars on the top of the cabinet, resulting in the original 2200mm high standard distribution cabinet being unable to meet the requirements of this distribution system, because a 2200mm standard height distribution cabinet can only install 2 sets of busbars on the top of the cabinet at most; and a distribution cabinet with a UPS distribution system needs to install at least 3 sets of busbars on the top of the cabinet, or even 5 sets of busbars; therefore, its height must be increased to 2600mm, or even 2800mm, so that the busbars connecting different power sources can be accommodated in the busbar room on the top of the cabinet.

[0005] Because the existing common power distribution cabinet has a fixed height of 2200mm, the busbar room is integrated with the low-voltage cabinet and is often on the top of the cabinet, occupying a height of about 200mm in the entire cabinet; the traditional 2200mm high cabinet can only accommodate two sets of horizontal busbar connections at most, which cannot meet the requirements of the power distribution system with emergency large-capacity UPS containing 3 or 5 or even more sets of busbars;

[0006] The busbar room top frame of a standard low-voltage cabinet is 200mm high and cannot accommodate a distribution system with more than two busbars. Utility Model Content

[0007] In order to solve the above problems, the present technical solution provides a low-voltage cabinet with a separate busbar top frame.

[0008] To achieve the above purpose, the technical solution is as follows:

[0009] A low-voltage cabinet with a separated busbar top frame, comprising a cabinet body and a busbar top frame of split design, wherein the busbar top frame is provided with a copper busbar electrically connected to a UPS, wherein an input end of the UPS is connected to a mains power supply through the copper busbar, and an output end is provided with a first connection end through the copper busbar;

[0010] The cabinet is provided with a second connection end electrically connected to the first connection end, and the cabinet receives electric energy through the second connection end and provides power to the load through the copper busbar.

[0011] In some embodiments, the first connection end and the second connection end are fixed by a copper busbar.

[0012] In some embodiments, a UPS main circuit and a static bypass are provided in the busbar top frame.

[0013] In some embodiments, an external maintenance bypass bus is also provided in the cabinet.

[0014] The beneficial effects of this application are:

[0015] This application is mainly aimed at busbar distribution systems with more than two groups. This application specially designs a split-type detachable low-voltage cabinet. The height of the low-voltage cabinet is fixed, and the height of the busbar room can be changed with the number of busbar groups in the distribution system. It is a low-voltage cabinet with a separate busbar top frame. After the busbar room of the low-voltage cabinet is separated and designed separately, it needs to be assembled with the original cabinet, and the horizontal busbar inside the busbar room needs to be seamlessly connected with the vertical busbar of the low-voltage cabinet to achieve the purpose of transmitting electric energy according to system requirements, while also ensuring the safe distance between each group of busbars; it effectively solves the problem that after the low-voltage distribution system has multiple groups of busbars, the standard low-voltage cabinet is not high enough to accommodate more than 3 groups of horizontal busbars. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the structure of the embodiment of the utility model Figure 3 . DETAILED DESCRIPTION

[0020] 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.

[0021] Please refer to Figure 1-3 As shown, a low-voltage cabinet with a separated busbar top frame includes a split-type cabinet body and a busbar top frame, wherein the busbar top frame is provided with a copper busbar electrically connected to a UPS, wherein the input end of the UPS is connected to the mains through the copper busbar, and the output end is provided with a first connection end 1 through the copper busbar;

[0022] The cabinet is provided with a second connection terminal 2 electrically connected to the first connection terminal 1 , and the cabinet receives electric energy through the second connection terminal 2 and provides power to the load through the copper busbar.

[0023] In this embodiment, the first connection end 1 and the second connection end 2 are fixed via a copper bus 3 .

[0024] In this embodiment, the busbar top frame is provided with a UPS main circuit and a static bypass.

[0025] In this embodiment, an external maintenance bypass bus is also provided in the cabinet.

[0026] The specific plan of this application is as follows:

[0027] A low-voltage cabinet with a separated busbar top frame is mainly designed to divide a standard low-voltage cabinet shell from a whole into two parts, namely: a cabinet top horizontal busbar top frame part, and a low-voltage cabinet functional part except the busbar top frame;

[0028] Generally, the low-voltage power distribution system that supplies power to large and important places is composed of low-voltage power distribution cabinets with various functions (such as: incoming line cabinet, contact cabinet, compensation cabinet, maintenance cabinet, feeder cabinet, UPS cabinet, transformer cabinet, etc.). The corresponding number of cabinets is selected from the above cabinet types, according to the function of the primary system diagram, and after the horizontal busbar is electrically connected between the cabinets, a set of fully functional low-voltage distribution boards can be formed; so in order to more comprehensively explain the adaptability of this patent design, this patent specially designs a set of practical and simple primary system diagrams. This power supply system can supply power to particularly important loads in the primary load; and according to this system diagram, a group of low-voltage cabinets with separated busbar top frames are drawn; due to the different types of cabinets in this group of distribution systems, this scheme only selects a low-voltage cabinet 1AA2 in the system diagram as a representative, and explains its structure in detail as follows, and then explains the functions of such cabinets from a single unit to the whole according to similar principles;

[0029] The corresponding low-voltage cabinet 1AA2 in this power distribution system is the UPS incoming line cabinet. Its main function is that the two switches in the cabinet respectively supply power to the main circuit and static bypass of the UPS, providing overload and short-circuit protection for it. Because there are four groups of horizontal busbars (1) to (4) on the top, two of which are 2000A and are electrically connected to the UPS through the horizontal copper busbars on the top of the cabinet; the other two groups, one is a 4000A mains busbar, and the other is a 4000A external maintenance bypass busbar. If the traditional standard 2200mm height is followed, the cabinet top cannot accommodate so many busbars, and the cabinet body must be raised. This solution is to divide its structure into two parts as above: a 2000mm high cabinet body and a 600mm high top frame.

[0030] The 2000mm high cabinet is made of thickened cold-rolled steel plates, which are bent into columns and beams to assemble into the skeleton of the low-voltage cabinet, and then the front and rear door panels + cabinet cover + partition + busbar clamp + mounting bracket + insulating beam are assembled into a standard cabinet with a width of 600*depth of 1000*height of 2000mm. The cabinet compartments are: two frame circuit breaker compartments in the front of the cabinet, a vertical busbar connection room for the busbar connection of two frame circuit breakers and the installation of transformers at the back of the cabinet, and a vertical busbar room on the side; bolt holes are opened on each of the four beams on the top of the cabinet, and the size, number and position of the holes are consistent with the bottom holes of the busbar room at the top; after the busbar top frame is aligned with the cabinet, the hole is connected and tightened through the M8 standard bolt, and the top frame and cabinet can be fixed; the opposite can also be achieved.

[0031] The separate busbar room on the top of the cabinet is 600mm high. The busbar room also uses thickened cold-rolled steel plates, which are bent into columns and beams to assemble into the skeleton of the busbar room, and then assembled into a busbar top frame with a width of 600*depth of 1000*height of 600mm with top cover plate + front and rear door plates + busbar clamp + mounting bracket. This top frame needs to run through the horizontal busbars of the entire cabinet, so there are no sealing plates and partitions on the left and right; the bottom of the top frame needs to be connected to the vertical copper busbar, so there is no sealing plate, but an insulating partition with holes needs to be added; considering that the busbars in the busbar room need to be installed, connected and maintained, the front and back of the top frame are designed to be doors with hinges on one side and door locks on the other side, and can be opened; the top cover has hinges at the back and door locks at the front, and can be opened from front to back;

[0032] The length and width of the cabinet and the top frame are consistent, only the height is different. The 2000mm high cabinet is the standard size. The top frame height is determined by the number of horizontal busbars in the power supply system. If there are more busbar groups, it can be 600mm or 800mm high, and if there are fewer, it can be 300mm or 500mm high. In this power distribution scheme, there are at most 4 groups of busbars on the top of the cabinet, which are designed to be 600mm high. The 4 groups of busbars in the 1AA2 cabinet are staggered up and down and front and back to meet the safety regulations of live clearance and insulation distance. At the same time, the 1st, 2nd and 3rd groups of busbars are placed on the first layer. The first group is a 4000A mains busbar. , its right end is separated from the 2nd and 3rd groups of busbars. The 2nd and 3rd groups are respectively the 2000A UPS input main busbar and the 2000A static maintenance bypass busbar, which are electrically connected to the top of the UPS cabinet respectively and installed by staggering front and back; the 4th group of busbars is the 4000A external maintenance bypass busbar, which is placed on the second layer (the top layer), and the above 4 groups of busbars can be installed in the 600mm high top frame; the connecting busbars inside the 2000mm high cabinet are all installed and sent to the on-site power room; the top horizontal busbar and the top frame busbar room need to be packaged and transported separately and sent to the site. The installation process is to install all low-voltage cabinets in place according to the order of the drawings, then install the busbar frame on the top of the cabinet, and finally open the front and rear door panels and cover of the busbar room to assemble the horizontal busbar. The busbar installation needs to be aligned with the drawings and carried out in the corresponding order. The horizontal copper busbar on the top of the cabinet and the vertical lap copper busbar are fastened with bolts; assemble from bottom to top in groups. After installation and final test, it can provide reliable working power to the important loads in the first-level load according to the system drawing function;

[0033] In addition to the two mains supplies, this power distribution system is also equipped with a 1000KVA UPS as an emergency power supply. Under normal power supply conditions, the mains is supplied to the UPS through the incoming line, and the high-power rectifier inverter module of the UPS supplies power to the load through the 1AA4 feeder cabinet. The UPS also charges the large-capacity battery for energy storage. When this mains fails, the other mains is input from the interconnection circuit breaker, and can supply power to the subsequent loads in the same way. When both mains fail at the same time, the large-capacity battery of the UPS is converted into AC power through the inverter, and the output is used to power the load. The UPS is online, and the conversion time to battery power after a power outage is zero, which solves the problem of uninterrupted power supply to the load to the greatest extent.

[0034] The technical effect of this scheme is

[0035] The technical advantage of this patented design is that after the busbar chamber is separated and designed separately, it can be seamlessly assembled with the original cabinet, and the height of the top frame busbar chamber can be adjusted according to the number of busbar groups on the cabinet top. Under the condition that the cabinet height is kept at the standard height of 2000mm, the main height of the low-voltage cabinet is standardized and can be seamlessly assembled with top frames of different heights. This cabinet is most suitable for the scenario of cabinets with multiple horizontal busbar groups.

[0036] After the busbar compartment of the cabinet is separated from the cabinet, the interchangeability and practicality of the whole cabinet are enhanced, which can ensure that the cabinet with a height of 2000mm is universal and interchangeable. No matter how many sets of busbars there are in the busbar compartment, it is only necessary to design the height of the busbar top frame separately. The cabinet with a height of 2000mm is universal and standard. The structural parts of the standard cabinet can be mass-produced, and the manufacturing and processing are convenient, with less inventory and processing types, which can also greatly reduce the processing and production costs.

[0037] This solution makes the entire distribution cabinet more convenient to transport, install and carry. The ultra-high low-voltage distribution cabinet is divided into two parts for transportation, which saves the transportation and installation costs of large hoisting equipment compared to overall transportation.

[0038] The front and rear door panels and top panel of the top frame designed in this scheme have doors that can be opened and locked, which not only ensures the convenience of installation and maintenance, but also ensures the safety of maintenance personnel. A padlock can be installed when the low-voltage cabinet is energized and only unlocked and opened during maintenance, which provides the greatest safety guarantee for maintenance personnel.

[0039] 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. A low voltage cabinet with a separated busbar top frame, characterized in that: It comprises a split-type cabinet and a busbar top frame, wherein the busbar top frame is provided with a copper busbar electrically connected to the UPS, the input end of the UPS is connected to the mains via the copper busbar, and the output end is provided with a first connection end (1) via the copper busbar; The cabinet is provided with a second connection end (2) electrically connected to the first connection end (1); the cabinet receives electric energy through the second connection end (2) and then provides power to the load through the copper busbar.

2. A low voltage cabinet with a separated busbar top frame according to claim 1, characterized in that: The first connection end (1) and the second connection end (2) are fixed via a copper busbar (3).

3. A low voltage cabinet with a separated busbar top frame according to claim 2, characterized in that: The busbar top frame is provided with a UPS main circuit and a static bypass.

4. A low voltage cabinet with a separated busbar top frame according to claim 3, characterized in that: An external maintenance bypass bus is also provided in the cabinet.

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