0.4kV配电室进线保护回路的优化方案  

Optimization Scheme of Line Protection Circuit for 0. 4 kV Power Distribution Room

作　　者：李晨明[1] 段明海[1] 杨红梅[1] 李兆新[1] 

机构地区：[1]新疆独山子石化公司乙烯厂公用工程联合车间,新疆独山子833600

出　　处：《低压电器》2013年第12期51-52,56,共3页Low Voltage Apparatus

摘　　要：针对采用双电源单母线分段控制方式,0.4 kV配电室低压进线,且带电流保护的断路器,存在无法对其进行预防性试验等弊端,提出了一些对低压配电室进线电流保护回路的优化设计改造方案。通过采用SPAJ140C组合式过电流和接地故障继电器(以下简称140C综合保护继电器)作为0.4 kV进线电流保护的方法,实现了当0.4 kV设备发生电流故障时140C综合保护继电器能快速、可靠切除故障回路,解决0.4 kV进线电流保护的弊端问题。For the 0.4 kV power distribution room low voltage line which adopts double power single busbar sectional control mode, and the circuit breaker with current protection, it is unable to carry on the preventive test. This paper put forward some optimization schemes of the line current protection circuit in low voltage distribution room. Through the use of SPCJ140C comprehensive protector as the 0.4 kV line current protection method, when 0.4 kV equipment has fault current, SPCJ140C can remove the fault circuit quickly and reliably, completely solve the problems of 0.4 kV line about current protection.

关 键 词：配电室 低压断路器 保护回路 可靠性 综合保护继电器 电流互感器 

分 类 号：TM761[电气工程—电力系统及自动化]