I. Technical indicators for central room sites
Location: the rooms shall be equipped with physical environments such as dust, tide, mine, static, flame retardation, insulation, heat insulation, noise loss, etc., and shall be fully equipped to guard against theft, free from interference by a strong magnetic field, and shall select an intermediate layer of the building to facilitate management and wiring. Avoid being located on the highest floors, basements and lower levels of water equipment。
Composition: the central room includes the mainframe and support rooms. The mainframe room is a specialized room for the various servers, network equipment, cabinets, etc.; the support room is used to store ups power, maintenance tools, etc., and the support room can be used together with the host room, depending on the circumstances。
3. Size: the number of network central rooms is determined on the basis of school size and actual application needs, the size of the mainframe room is in principle not less than 20 m2, the height of which is not less than 2. 8 m, the ability to meet storage requirements for the various types of equipment available and the availability of scalable space for future development。
Calculation formula: s = ka (s-guided room space; k-point factor, drawing 4. 5-55 m2/bar (mount) and a-meaning equipment (mount) total)
4. The administrator's office must be separated from the mainframe room, depending on personnel, equipment and needs。
Ii. Refurbishment of the central room
1 hanger: the central room shall have a metal ceiling hanger, and beams and roofs shall be protected from dust。
2. Walls: the walls shall be subject to soundproofing, fireproofing, waterproofing, dustproofing, radiationproofing and shielding, and the walls shall be coated with fireproof emulsions。
3 interception: the space-separated wall in the room should be separated by 12 mm fire-resistant steel glass。
4. Ground: the floor must be flat. And do waterproofing. The floor is detached with air-protected static power at altitudes of between 15 and 35 cm。
5. Gates and windows: fireproof doors should be installed at the entrance and exit of the main house, window protection against theft should be installed at the window of the machine room, while waterproof rain sheds should be installed at the outside window to prevent rain spilling, the curtains should be structured in two layers, and the outer layer should be equipped with photo-insulated curtain material to avoid direct exposure to sunlight。
6. Lighting:
(1) no less than 300 lx (0. 3 m above ground) on average for the mainframe room
(2) basic workspaces and support rooms have an average of not less than 150 lx (0. 3 m above ground). Average lightness (eav) = number of light fluxes x lamps (n) x space utilization factor (cu) x maintenance factor (k) x floor area (long x width) of individual lamps。
Iii. Central room power distribution system
1. Power supply: the distribution system is the focus of the entire machine room project, using two-way power supply (general-purpose equipment such as lighting, air conditioning, municipal power supply, specialized equipment such as servers, powered by ups and all lines separated independently). The rooms are provided with an independent three-stage, five-line or single-stage power supply. Schools with conditions can provide independent generators for the central room。
2. Electrical distribution cabinets: the machine room shall set up municipal electric and ups distribution cabinets, which shall display basic information on each phase input, output voltage, current intensity, etc., indicating the use of each switch。
Ups configuration: ups is the basic equipment for the construction of the central room, and schools should purchase ups equipment to provide stable and continuous power supply to the room and to guarantee a certain amount of power supply in case of power outages. Ups capacity should be set aside at 1. 5 times the total power, with an online backup time greater than 2 hours (ups discharge time formula: load power x support time = battery discharge capacity x battery voltage xups reverse efficiency)。
Plug-in: the fixed plug-in is divided into ups plugins and municipal electric plug-ins, and the mobile plug-in should be based on standard 220v, 16a wave-surge plugs. The cabinets are provided with ups power, and interlocks cannot be shared. All outlets must be separated. In principle, each cabinet should be equipped with two ups outlets and one municipal electric plugin。
5. Cables: cables should select high-quality copper core cables that meet national standards, with a primary trunking line cut-off area of at least 10 square millimetres, a ups plug wire cut-off area of 4 square millimetres, a power line cut-off area of 2. 5 square millimetres for lighting, and a power cut-off area of at least 4 square metres for 3p air conditioners. Wires should be placed in a bridge or an pvc tube to prevent electromagnetic interference equipment, and to mark the direction and function and facilitate maintenance。
