石化企业照明箱进线断路器分断能力的选择  

SELECTION OF BREAKING CAPACITY OF LIGHTING DISTRIBUTION PANEL INCOMING CIRCUIT BREAKER IN PETROCHEMICAL ENTERPRISES

作　　者：张鑫[1] 

机构地区：[1]中国石化工程建设有限公司,北京100101

出　　处：《石油化工安全环保技术》2015年第3期3-6,共4页Petrochemical Safety and Environmental Protection Technology

摘　　要：照明配电箱主进线断路器通常采用微型断路器,其分断能力的选择是以其在低压配电线路中安装位置处的三相最大短路电流为依据,而短路电流又受到配电线路的长度、变压器的容量和阻抗电压等参数的影响。以实际工程案例为基础,通过上述参数的变化,计算得出一系列照明配电箱进线微型断路器处的三相最大短路电流,并以此为依据对照明配电箱主进线微型断路器分断能力进行合理的选择。Lighting distribution panel 's main feed line circuit breaker usually adopts the Micro Circuit Breaker. The selection of its breaking capacity is based on the maximum three-phase short-circuit current in low voltage distribution circuit and the shortcircuit current is affected by such parameters as the length of the distribution line,the capacity of the transformer and impedance voltage and so on. Based on actual project,this paper calculated a series of data of the maximum three-phase short-circuit current which occur in the miniature circuit breaker of lighting distribution panel through changing the above parameters. And on the basis of these data,the breaking capacity of the lighting distribution panel's main feed line circuit breaker can be selected reasonably.

关 键 词：照明配电箱 微型断路器 短路电流分断能力 阻抗 

分 类 号：TM561[电气工程—电器]