Weak current consumption standard

Weak current is relative to electricity and lighting. In general, the electric energy used for electricity and lighting is called strong electricity; The electric energy that spreads signals and exchanges information is called weak current. The processing object of strong electricity is energy (electricity), which is characterized by high voltage, high current, high power consumption and low frequency. The main consideration is to reduce loss and improve efficiency. The processing object of weakness is mainly information, that is, information transmission and control, which is characterized by low voltage, low current, low power and high frequency. The main consideration is the effect of information transmission, such as fidelity, speed, breadth and reliability. Provide the configuration requirements of weak current computer room of building professional intelligent subsystem. Generally, there are two weak current computer rooms, one is the central control room for fire control, monitoring, broadcasting, BAS and BMS, which is used as the property management and mechanical and electrical equipment control center, with an area of 80m2. One is the computer network center computer room and telephone host room, which are used as information control centers, with an area of 120 m2. The former is generally located on the ground floor, while the latter is generally located on the second and third floors. Others include the cable TV room with an area of 20 m2 (ground floor) and the satellite TV room with an area of 15 m2 (roof room floor). In addition, there are some other satellite control rooms for different intelligent subsystem configurations: if a large-screen display system is considered, there should be a control room with an area of 6m2; Considering the conference video system, there should be a control room with an area of10m2. Considering the simultaneous interpretation system, there should be a translation room, each room is 4m2. Considering the parking lot management system, there should be a management room with an area of 6m2. Considering the one-card system, a business card printing and issuing center with an area of 15 m2 is needed. Anti-static raised floor should be used in the main room, which is generally 200 ~ 300 mm overhead, and the door is opened outwards. The location of each computer room should be appropriate and the area should be sufficient, and auxiliary rooms should be considered to expand the room. Pay attention to the height of the computer room, with a clear height of about 3m. The floor load is 5.0~7.5KN/m2.

For important subsystems in intelligent system, such as computer network system, security closed-circuit television monitoring system, UPS uninterrupted power supply is generally considered. If UPS is centralized power supply, UPS and battery room should be considered. If UPS is distributed power supply mode, the occupied area of UPS and battery pack should be reserved when considering the area of weak electricity room.

Provide the setting requirements of weak current shaft for building specialty. In general engineering, the weak current shaft and the strong current shaft are set separately, and the position of the weak current shaft should ensure that the cable length to any computer information point on the plane does not exceed 90m. For buildings with large volume, long span or settlement joints, it is best to have multiple weak current shafts, each with an area of about 6 m2. If there are many cabinets, the area is 10 m2. Architects should understand that the current weak current shaft is not only a cable bridge, but also a floor setting room. The weak current shaft door opens outward, facing the public passage, and adopts fire doors.

Provide electrical equipment for electrical specialty, such as computer information point, TV terminal, TV front-end amplifier, distribution box, etc., and require electrical specialty to set up corresponding single-phase power socket. Generally, each computer information point is considered as 300W, and the distance between the power socket and the outer edge of the computer information socket is 200 mm.. And inform the calculation load of each plane computer information point (considering the simultaneous coefficient), and the power supply is provided by the electrical specialty. In general engineering, computer terminals are not powered by UPS in the computer room. In case of high requirements in important places, single-phase 500VAUPS power supply shall be provided. It is best to have a separate distribution box for the computer power supply in the office building, which is not used for general lighting.

Provide electrical professionals with electricity demand and calculation load for conference sound reinforcement, projection, video conference system, multimedia teaching system, electronic reading room, microcomputer classroom, parking lot management system management room, etc. The large screen display provides the area, and its load is about 700W/m2. Multi-function hall, great hall, theater, gymnasium, audio equipment and distribution box of lighting control system are set separately, and it is best that two boxes of power supply come from different transformers.