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随着国民经济的发展,人民生活水平的提高,对建筑的要求由满足使用型转变为功能齐全且电气化程度高的新标准,建筑电气在建筑中所处的位置日益重要,由于民用建筑电气自身的特殊性,有以下几个特点。 1.负荷的不确定性 在一般的供电系统中,正常的设计思路是:首先确定计算负荷,再根据计算电流选定保护器,最后校验。而在建筑电气中,线路的负荷往往是很难确定的。这就给设计者制造了一个很大难题:究竟如何确定保护器的额定值?过大,不能有效地保护;过小,会降
With the development of the national economy and the improvement of the people’s living standards, the requirements for construction have changed from satisfying the use of a type to a new standard of full-featured and highly electrified. The position of building electrics in buildings has become increasingly important due to the civil building’s own electrical The special features have the following characteristics. 1. Uncertainty of load In the general power supply system, the normal design idea is: first determine the calculation load, then select the protector according to the calculated current, and finally verify. In building electrical, the load of the line is often difficult to determine. This creates a big problem for the designer: how to determine the rating of the protector is too large to protect effectively; if it is too small, it will drop