消防广播传输线允许最大距离计算  

Calculation of Allowable Maximum Distance of Fire Broadcasting Transmission Line

作　　者：倪高俊 郑凯 NI Gaojun;ZHENG Kai(The Architectural Design&Research Institute of Zhejiang University Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]浙江大学建筑设计研究院有限公司,浙江杭州310000

出　　处：《现代建筑电气》2021年第3期69-72,共4页Modern Architecture Electric

摘　　要：针对现有规范和图集关于消防广播传输线允许最大距离计算存在错误和不妥的现状,根据据线路电压降和线路衰减推导了其计算公式,计算了不同功率时衰减不大于0.5 dB和3 dB的允许最大距离选择表。In view of the errors and improprieties of the allowable maximum distance calculation of the fire broadcasting transmission line in the existing codes and atlas,the calculation formula is derived according to the line voltage drop and line attenuation.Based on it,the allowable maximum distance selection table with attenuation no more than 0.5 dB and 3 dB at different power is calculated.

关 键 词：消防广播 传输线路 传输距离 额定传输电压 声衰减 

分 类 号：TU856[建筑科学]