消防水泵、消防风机的电气保护  

Electrical Protection of Fire-fighting Water-pump and Wind-motor

作　　者：王明全 

机构地区：[1]重庆惠庭都市建筑设计事务所,重庆市400020

出　　处：《建筑电气》2007年第2期41-45,共5页Building Electricity

摘　　要：对消防水泵、消防风机常用保护作了介绍,并着重对如何贯彻执行《通用用电设备配电设计规范》(GB50055-93)第2.4.6条及《低压配电设计规范》(GB50054-95)第4.3.5条进行了分析。消防水泵、风机的短路保护和接地保护电器宜选择满足电动机启动要求的非选择性装置式配电型断路器。电动机过载保护通常采用继电器,而配电线路过载保护多采用断路器的长延时过电流脱扣器来完成。消防水泵有备用电动机,应设过载保护动作于跳闸,而消防风机的过载保护应动作于信号。消防水泵、风机采用直接启动时,可选用带长延时脱扣器的断路器,而降压启动末级断路器按常规选择时,不应带长延时过电流保护。Common protection ways of water- pump and wind-motor for fire-fighting are introduced. The emphasis is on how to carry out the article 2.4.6 of code for design of electric distribution of general-purpose utilization equipment and the article 4.3.5 of code for design of low voltage electrical installations. Protective devices for short-circuit and earthing fault of water-pump and wind-motor should select non-selective equipment type distribution circuit-breaker which can meet starting requirements of motor. Protection against motor over-load usually adopt thermal relay, but protection against line over-load usually adopt long delay over-current release of circuit-breaker. Overload protection for water- pump with standby pump should trip power off, but overload protection for wind-motor should transmit signal. Protective devices can select circuit-breaker with long delay over-current release when water-pump and wind- motor adopt direct starting. While lowing voltage starting, the final level circuit-breaker may not has long delay over- current release in the ordinary selection.

关 键 词：电动机过载保护 配电线路过载保护 非选择性装置式断路器 脱扣器额定电流 保护选择性配合 

分 类 号：TU998.13[建筑科学—市政工程]