施工现场临时用电断路器的选择

Choice of Temporary Electricity Circuit Breaker at Construction Site

依据GB 50194—2014《建设工程施工现场供用电安全规范》、JGJ 46—2005《施工现场临时用电安全技术规范》等相关标淮,介绍了施工现场临时用电断路器的配置要求,选用符合标准GB 14048.2—2008《低压开关设备和控制设备第2部分:断路器》的断路器,分析了断路器分断能力选择和参数选择,阐述了断路器选择性配合的校验,以及用剩余电流动作保护作接地故障保护的必要性。提出施工现场临时用电断路器的选择既要保证可靠性,又要考虑经济性,需要快速、准确地估算短路电流。

According to the standards of GB 50194-2014,JGJ 46-2005, this paper introduced the configuration requirements of temporary electricity circuit breaker at construction site,which should select the circuit breaker meeting standard GB 14048.2-2008. The breaking capacity choice and parameters choice of circuit breaker were analyzed. The selectivity coordination check of circuit breaker and the necessity of the residual current operated protection for grounding fauh protection were elaborated. It is pointed out that the choice of temporary electricity circuit breaker at construction site should ensure the reliability and economy,which quickly and accurately estimates the short cireuit current.