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Intelligent Building of the weak system of initial requests for lightning protection design

The introduction of line position,[link widoczny dla zalogowanych], to avoid installation in wet or corrosive steam or gas and the place susceptible to mechanical damage, the grounding terminal board connection point should have a strong mechanical strength and good electrical continuity. 4.2.4 Route grounding system should be introduced through the ground floor to the ground terminal of the board, and through the ground lead to the microelectronic device 29 within the building equipment room of each ground terminal board. Ground lines should be multi-strand copper cable or copper busbar or galvanized flat steel; in strong or weak power shaft located within the specified; grounding wire should be a multi-strand copper cable, wearing dark steel design. Room for important equipment, ground system can also be directly through the ground wires. 4.2.5 cabling system should have good grounding system. When using shielded cabling system, each subsystem should maintain the continuity of the shield to meet the electrical system on the side of continuity. 4.3 Measures to reduce the shielding of electromagnetic induction 4.3.1 When equipment Intelligent Building conductive metal, and metal trunking cable shield (frame) from entering the building frame or reinforced concrete to do so should be close to their potential connections. 4.3.2 Equipment Intelligent Building room should be avoided in high-rise buildings, should choose the lower center of the building, and as far as possible away from the pillar structure of the building (the main deflectors). That set the highest level of lightning protection (LPZ2 or LPZ3) area. Should be based on zoning and lightning devices Intelligent Building requirements, the building as a full-screen (external screen),[link widoczny dla zalogowanych], some shielding,[link widoczny dla zalogowanych], partial shielding, equipment and piping shield, the inner layers of lightning electromagnetic fields generated by decay. Line shield 4.4.1 4.4 indoor and outdoor space in need of protection (such as outdoor), should be shielded, the shield should be at least at both ends and should be done in the lightning protection zone at the junction of bonding. 4.4.2 External lead wire when the use of non-shielded cable, the home front should be laid and buried in the metal pipe in the horizontal distance to l0 meters. Subject to conditions such as buried pipes can not wear, it should be extended the length of metal pipe person households, the metal tube from side to side should be the electrical conduction, and at its ends and in the lightning protection zone should be at the interface do bonding and grounding. 4.4.3 cable containing metal parts should be connected to all the joints along the cable, etc. tidal regenerator layer (metal layer), and fiber optic cable along each side of the terminal directly to ground or through the switching surge protection of the contact. 4.4.4 multiple interconnect cables between buildings should be laid in metal pipes. Such as metal pipes, metal grille or 30 reinforced concrete pipe, both ends of the channel should be the laying of electrical conduction, and a separate building connected to the equipotential bonding belt. Cable shields inside the tubes should be connected to the belt. When the cable shield to the foreseeable lightning traffic load,[link widoczny dla zalogowanych], the cable may be laid in metal pipes. 4.4.5 cabling system devices and the different floors, or different lightning protection zones should be set within a wire transfer and other potential special grounding terminal. Integrated wiring systems, wiring closet on each floor of the copper cross-section should be appropriate wiring to a separate grounding conductor, may also have shafts or coarse copper concentrate copper lead to the grounding conductor or copper conductor cross-section should meet the standard,[link widoczny dla zalogowanych], ground wire should be connected into a tree structure of the grounding grid, to avoid constitute the DC loop. 4.4.6 Intelligent Building device for non-metallic shell, and shield the building does not meet the requirements, respond to equipment installation of metal mesh screen (or metal shielded room), metal screen should be bonding with the other potential connection. 4.47 cable laying a. reasonable Sui general case, the laying of electrical lines within the building lines of the metal tank the total should be laid in the central part of building strong power shaft, and should avoid the vicinity of the pillars near as off the assembly line. b. The laying of the information wall wiring cables, optical cables and pipelines and the spacing should be consistent with other pipelines \c. Devices Intelligent Building Systems with the nearby cables may have high magnetic interference motors, power transformers and other electrical equipment should be maintained between the necessary spacing. Microelectronic devices integrated wiring cable and power cable spacing should be consistent with \5 Installation SPD SPD should make both ends of the connection as short as possible to reduce the surge current over the voltage drop across the leads in the SPD. Except as otherwise provided in the design, the total length of wire at both ends of each SPD should not exceed 0.5 meters. SPD should be near the grounding line of the access lines or PE PE row.

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