高层建筑电气设计的主要内容及有关问题（Main contents and problems of electrical design for high-rise buildings）.docVIP

高层建筑电气设计的主要内容及有关问题（Main contents and problems of electrical design for high-rise buildings） The main content of the electrical design of high-rise building and related problems The main content of the electrical design of high-rise building 1. load calculation The power load is based on the parameters of power supply design. The calculation accuracy of equipment selection, safety and economic operation, plays a decisive role. The power load calculation of high-rise buildings, basically by load density method and demand coefficient method. 2. power supply and voltage selection In order to ensure the reliability of power supply, modern high-rise buildings should have at least two independent power supply, the specific number should be considered and the local power grid load conditions and. Two independent power operation mode, is in principle at the same time two-way power supply, standby for each other. In addition, to install emergency diesel generator, automatic restoration of power supply in 15 seconds, to ensure emergency lighting and computer equipment, Fire fighting equipment, elevator equipment such as electrical accident. The voltage of the power supply of domestic high-rise buildings, have adopted the standard 10kV voltage level. The design of 3. high and low voltage power distribution system (1) high voltage distribution system: modern high-rise buildings are used in two independent power supply and 10kV power supply. The general high voltage single bus, automatic switching, mutual backup. Bus number, compatible with the power line circuit number. Only when the power supply is a main one prepared, be considered not a single sub bus of the tie line. Almost all of the power line cable line. (2) billing, with high. But in the low voltage side, is arranged to separate the design fee watt hour meter, lighting and power of the two part pricing method. Some local power supply department and the electricity and air conditioning equipment, lighting all assigned to