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为了对火灾加以预防并在火灾发生时及时疏散人员、控制火势扩散、减少经济损失,对消防用的配电线路施加过负荷保护非常重要。为此,在建筑的设计阶段,就要注重消防用电设备的特征,有针对性地布置过负荷保护,以达到保护消防配电线路安全的目的消防配电线路在过负荷保护方面的国家规定1.低压配电下过负荷保护的国家规范在国家的相关规范中,对过负荷保护应用于消防配电线路方面的电器特性做出了明确要求。其熔断器熔体的额定电流、断路器的额定电流、整定电流三者应大于等于线路的计算负载电流,小于等于导体允许的持续载流量。此外,用于对电器的可靠动作进行保护的保护电流应小于等于导体允许的持续载流量的1.45倍。消防配电线路的过负荷保护电器需要同时满足以上两个要求才行。如果限定为低压配电,
In order to prevent the fire and timely evacuation of personnel in the event of a fire, to control the spread of the fire and reduce economic losses, it is very important to apply overload protection to the distribution lines for fire protection. To this end, in the design phase of the building, we must pay attention to the characteristics of fire-fighting electrical equipment, targeted layout of overload protection in order to achieve the purpose of protecting the safety of fire distribution lines Fire Distribution Line in the overload protection of the state regulations 1. Low voltage distribution under the national standard overload protection In the relevant national norms, the overload protection applied to fire distribution lines made electrical characteristics made clear requirements. The fuse fuse rated current, circuit breaker rated current, setting current three should be greater than or equal to the line of the calculated load current, less than or equal to the continuous current allowed by the conductor. In addition, the protective current used to protect the reliable operation of the appliance should be less than or equal to 1.45 times the continuous current allowed by the conductor. Fire power distribution line overload protection appliances need to meet the above two requirements Caixing. If limited to low voltage distribution,