(1) room area not less than 10 square meters, clear height of not less than 2.5 meters.
(2) The room is equipped with an indoor cabling rack, feeder window, grounding copper row, anti-static flooring, air conditioner outdoor unit anti-theft cage, security doors air conditioning outdoor unit specifications for the use of anti-theft cage 30mm * 3mm hot galvanized angle, the surface do effective rust treatment, using ≥? expansion screw 12 fixing the security network expansion bolt welded by spot welding, and configure the security lock on the door.
(3) room lighting: Set two single-tube (per lamp 220V / 40W) or one pair of fluorescent tubes (each lamp 220V / 40Wx2) fluorescent lamps.
(4) power cord with PVC trunking is fixed in the machine room wall or alignment rack, the engine room to provide a single phase outlet for at least two or more, three-phase electrical socket 1.
Tower mast Requirements
(1) tower design two platforms, each platform design three directional antenna and adjustable stand; along with microwave adjustable stand, the requirements may pay 2G antenna mount 3, 3 TD antenna pay three pay RRU amplifier device, 1 pay microwave, pay 1 GPS antenna.
(2) tower height (height from the bottom to ground lightning rod) between 20 meters to 35 meters, the height of a specific design requirements shall prevail.
(3) lifting tower with automatic control devices and manual controls two systems to guarantee the safety of the tower lifting, adjusting step grow up to 0.5 meters.
Grounding lightning protection requirements
Require manufacturers with the goods shipped grounding materials, including vertical ground pile (made of: L50 * 5 * 2500 galvanized Q230B angle), the level of grounding (material: 40 * 4 * 6000 Q230B flat galvanized iron), copper and iron conversion, ground pool row, the specific construction technical measures are as follows:
1, lightning technical measures
Communication device (1) mounted on the integrated base station tower, according to the third class of mine buildings lightning protection design.
(2) in the tower overhead lightning rod installation and reliable electrical connection with the tower; use as a ground conductor tower, the tower should be installed to ensure reliable electrical connections; foot tower at the tower metal components and welded Tower reliable basis.
(3) According to the lightning protection and grounding requirements, various tower high tower whose top shall be provided to meet the corresponding requirements of lightning rod height, material used circular steel lightning rod effective coverage by 45 ° computing.
2, grounding technical measures
Top (1) Design grounding grid casing 900mm, galvanized steel vertical ground lead wire embedded in concrete on the top floor extends 1000mm.
(2) The grounding resistance is less than the design values apply to 5Ω, if measured greater than 5Ω, plus the need to play 3 m spacing ground pile, until meet the design requirements.
(3) Tower grounding lightning protection system should be less than 20m range built around two points (structures) Lightning grounding system communicates.
Composition (4) Tower to the network: the Eiffel Tower to the network using 40mm * 4mm galvanized flat steel tower foundation will foot inside each tower composed of metal components welded communication tower to network tower to network and extends to the outer base of the tower legs 1.5m far range, the mesh size should not exceed 3m * 3m, its perimeter is enclosed.
(5) The grounding electrode material requirements: vertical grounding body length of 50mm * 5mm hot 2.5m galvanized angle steel; special circumstances may be appropriate to reduce the length of vertical grounding buried according to soil and ground network geography.
(6) Setting and laying ground network requirements: upper grounding from the ground shall not be less than 0.7m (such as underground rock, may decide to depth according to the terrain), in cold regions, grounding body should be buried in the permafrost below.
(7) The grounding resistance: mobile communication base station joint grounding resistance value shall (China mobile communication base station lightning protection system regulations) Article 30 Executive grounding resistance value mobile communication base station to the network should be less than 5Ω, less than the annual thunderstorm days 20 days in the region, grounding resistance value may be less than 10Ω. In the high resistivity area network tower to be used for soil and other methods to reduce joint grounding resistors.
(8) construction process requirements: lightning protection and grounding construction process shall (China mobile communication base station lightning protection system regulations) Chapter IV perform flat iron and flat iron (including angle) lap length is twice the width of the flat iron. When soldering to do welding on three sides, and network construction in three welded parts should be treated with preservatives, specific mode of operation is first coated with asphalt, then a layer of burlap around, apply a layer of asphalt.
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