Impact Resistance Communication Rack Cabinet Seismic Design Construction YH9002

Electromagnetic Isolation Communication Rack Cabinet with Flexible Size YH9002

Drawing of Electrical Parts Wiring Diagram
The wiring diagram is drawn according to the electrical principles of the components and the layout of the electrical components. It represents the connection relationship of the complete set of devices and is the basis for electrical installation, maintenance, and inspection of lines. The wiring diagram should be drawn according to the following principles:
(1) The drawing of the phase diagram of the wiring diagram shall be in accordance with the provisions of GB6988.6-1993 "Drawing of functional diagram of control system";
(2) All electrical components and their leads shall be marked with the text symbol and wiring number in accordance with the electrical schematic. The preparation of the project code, terminal number and conductor number in the schematic diagram shall comply with the GB5094-1985 "Project Code in Electrical Technology" and GB4026-1992 "General Requirements for Identification and Application of Alphanumeric Systems for Electrical Equipment Terminal Blocks and Specific Wire Ends." "and" GB4884-1985 "insulated wire marking" and other provisions;
(3) Unlike electrical schematics, the various parts of the same electrical component (contacts, coils, etc.) must be drawn together in the wiring diagram;
(4) Electrical wiring diagrams are always drawn with thin lines. Two types of cabling are pre-board and post-board cabling. Generally, the board is used for cabling. For simple electric control components, the number of components is small and the wiring relationship is not complicated. The connection between components can be drawn directly. For complex parts, where the number of electrical components is large and the wiring is more complicated, generally the wiring slot is used. As long as the connection number is marked on each electrical component, it is not necessary to draw the connection between the components.
(5) The types, specifications, cross-sectional areas, and color requirements of the various conductors used for the wiring shall be marked in the wiring diagram;
(6) When parts and external circuits are connected, connectors for large section conductors should be connected with the connectors. Others should be connected via the terminal blocks.
In short, according to the above requirements, the sketch of the outline of the electrical control cabinet should be drawn out, the dimensions of each part should be estimated, and then the outline drawing should be drawn according to the proportion, and further consideration should be given to adjusting the proportions of the dimensions in terms of symmetry, beauty, and ease of use. After the appearance of the electrical control cabinet is determined, the structural design of each part of the control cabinet shall be carried out according to the above requirements, drawing the assembly diagram of the cabinet and the parts drawings of each side door, control panel, bottom plate, mounting bracket, trim strip, etc., and indicate the processing requirements. Then choose the appropriate door lock for the electrical control cabinet.
Finally, according to various drawings, we need to comprehensively count the various parts and materials required by the electric control cabinet, and list the summary list, standard parts list, main material consumption quota table and auxiliary materials of the purchased finished parts by category. Quota tables, etc., so that procurement personnel, production management departments make equipment preparation according to equipment needs, do a good job in production preparation, and also facilitate cost accounting.
3 Cabinet installation and fixing
Cabinet installation is the basis for equipment installation and must be installed in accordance with the standards.
(1) Before the cabinet is installed, check whether the exhaust equipment of the cabinet is in good condition, whether the number of equipment pallets is complete, and whether the pulleys and support columns are in good condition.
(2) The cabinet model, specifications, and installation location should meet the design requirements.
(3) The vertical deviation of the cabinet installation should not exceed 3mm, and the horizontal error should not exceed 2mm. Several cabinets shall be arranged side by side. The panels shall be on the same plane and parallel to the reference line. The deviation before and after shall not be greater than 3mm; the gap between two cabinets shall not be greater than 3mm. For devices arranged at a certain distance from each other and arranged in a row, the front and rear panel deviation shall not be greater than 5mm;
(4) The various parts of the cabinet must not fall off or break. If the paint is peeled off, it should be pre-painted. The signs should be complete and clear;
(5) When the cabinet installation should be firm and there are seismic requirements, reinforce according to the seismic design of the construction drawing;
(6) The cabinet should not be directly installed on the raised floor. The base should be made according to the size of the bottom plane of the equipment. The base should be fixed directly to the ground, the cabinet should be fixed on the base, and then the movable floor should be laid;
(7) The thickness of the channel steel in the cabinet base is not less than 50 mm. The grounding is good. The channel steel is fixed on the floor of the equipment room through the expansion bolts and interconnected with the grounding copper bar;
(8) The channel steel and the cabinet are connected stably by means of welding. There must be no black welding paint on the cabinet. It must be aesthetically appropriate.
(9) After the cabinet is fixed, ensure that the front, rear, left, and right cannot be pushed to ensure the stability of the cabinet.
(10) If the floor around the cabinet needs to be cut, use a cutting machine to cut it smoothly and remove burrs to prevent it from being cut.
(11) Install the cabinet panel and reserve 800mm space before the rack. The distance between the back of the cabinet and the wall should be more than 600mm to facilitate installation and construction;
(12) The wall-mounted cabinet should be 1200mm from the ground;
(13) The installation of equipment and components in the cabinet shall be performed after the cabinet is positioned and fixed, and the equipment installed in the cabinet shall be securely mounted.
(14) The fixing screws, washers and spring washers on the cabinet shall be fastened as required and shall not be missed;
(15) The hanging wall-mounted installation shall be installed on a flat and firm wall, at least 300mm from the ground, and shall be kept horizontal and vertical to the wall, and the vertical deviation shall be less than 3mm.
(16) Holes in the wall shall be protected from damaging the inner wall of the wall. The depth of the hole shall not be less than 70mm. The number of expansion screws used for fixing the cabinet shall not be less than 4 (6 for the suspended C-type cabinet). If necessary, support should be placed under the cabinet to ensure the safety and stability of the cabinet.
(17) For floor-mounted cabinet installation, consider the direction of opening of the cabinet and ease of operation when installing the pedestal, giving priority to the door opening direction of the wiring compartment. Equipment doors and wiring door must be fully open.
(18) The cabinet must be protected against lightning grounding.
(19) The cabinet should be properly marked after installation. The logo should be uniform, clear and beautiful. After the chassis is installed, the holes in the cabinet cables should be sealed with fireproofing clay. Do a good job of preventing rats, insects, water and moisture.
4 Cabling
4.1.1 Cabinet Power Arrangement
The cabinet shall be equipped with a set of detachable and replaceable fixed power distribution units (PDUs) for the introduction, distribution, protection, division, and connection (outlet or terminal) of cabinet equipment power. In the same cabinet, AC power distribution and DC power distribution should not be mixed (except for fan cooling fan power distribution).
4.1.2 Structure and Installation Requirements
The power distribution unit recommends the use of a vertical strip-shaped integrated structure that integrates power distribution, protection, and patching, and its front side is removable, making it easy to install and replace patch modules and connectors (wiring); The introduction, distribution, protection and separation of the separate part of the plug-in part of the structure, in which the introduction of power, distribution, protection part of the equipment at the top or bottom of the power distribution unit, and the plug-in part is still a vertical bar unit structure. The installation position of the vertical bar-type integrated power distribution unit or split-unit plug-in unit is generally the rear side of the cabinet (power cable tie bar or outside of the cable channel). In special cases, there may be one power distribution unit on the left and right sides (not recommended).
4.1.3 AC power distribution unit
A. The power distribution unit should be able to introduce both A and B dual power supplies at the same time. They should be completely independent of each other (including the grounding wire) and be separately powered. For cabinets without dual-channel power supply requirements, only one power supply can be introduced.
B. The input power of the power distribution unit generally uses a single-phase three-wire power supply (220V). In special cases, a three-phase four-wire power supply (380V) can be used. It also can be visualized with special requirements for power supply safety, using four-way power supply introduction.
C. The input terminal of the power supply should be equipped with a terminal group, which can connect cables below 16 mm2, and can install current metering devices as required. Each output branch should be provided with a terminal group or socket to provide the equipment with electrical conditions.
D. An independent over-current and short-circuit protection device shall be provided for the power input of the cabinet, and an independent over-current and short-circuit protection device shall be provided for each output branch.
E. The protection device can use AC air switch (recommended) or fuse switch-disconnector, installed on the phase line of the total input or output shunt to facilitate operation and replacement, and meet the heat dissipation requirements. The rating of the protection device should be consistent with The total input or output shunt rating matches.
——If air switch is selected, it shall comply with the requirements of GB 10963.1 and the instantaneous tripping mode shall be C type (trip range >5 In ~ 10 In).
—— If fuse switch is selected, it shall comply with the requirements of GB 14048.3, in which the fuse shall meet the relevant requirements of GB/T 13539.5, and the range and use category shall be gG type.