母联开关四极断路器选择分析  

Selection Analysis of Four-Pole Circuit Breaker for Bus Tie

作　　者：刘文杰 李刚 

机构地区：[1]大连红秋电控设备有限公司,辽宁大连116600 [2]大连豪森设备制造有限公司,辽宁大连116036

出　　处：《电工电气》2015年第1期26-28,50,共4页Electrotechnics Electric

摘　　要：低压断路器的正确选择在配电系统设计中至关重要,介绍了影响四极断路器选择的主要因素,分析了断零、中性线带电、杂散电流对断路器选择所造成的影响,并针对不同的接地形式讨论了母联开关四极断路器的选择方法。建议选用带有断零保护的四极断路器作为母联开关,达到既避免杂散电流,又保证供电系统安全可靠的目的。Correct selection of low-voltage circuit breakers is a very important factor in distributed system design. Introduction was made to the main factors impacting on four-pole circuit breakers. This paper analyzed the impacts of neutral breaking, live neutral line and stray current on circuit breakers selection, aiming at different grounding forms to discuss on the bus-tie four-pole circuit breakers selection method. It is suggested that the four-pole circuit breakers with neutral breaking protection should be selected as the bus tie switch to avoid stray current and to ensure power supply system safe and reliable.

关 键 词：断零 中性线带电 杂散电流 接地形式 四极断路器 

分 类 号：TM561[电气工程—电器]