张 强（ABB（中国）有限公司太原分公司，太原市 030026）

戴天鹰（ABB（中国）有限公司上海分公司，上海市 200023）

Discussion on Type Selection of Low -voltage Breaker for DC Distribution Network of Buildings

ZHANG Qiang（ABB（China）Taiyuan Branch，Taiyuan 030026，China）

DAI Tianying（ABB（China）Limited Company Shanghai Branch，Shanghai 200023，China）

    Abstract：The grounding types and fault types of DC low-voltage distribution system are introduced for the discussion on type selection of low-voltage breaker for the DC distribution system of buildings in combination with the requirements of IEC transformation standard on the protection equipment applied in the DC system and the R&D results and application achievements of electrical enterprises in the DC system.

    Key words：DC low-voltage distribution system；grounding types；voltage classes；fault types；type selection of low-voltage breaker；overload protection；grounding fault protection；breaker series wiring

  摘 要：介绍直流低压配电系统接地类型、存在的故障类型，结合IEC转化标准对直流应用的保护设备的相关要求及电气生产企业直流领域研发和应用的成果，探讨如何在建筑物直流配电网进行低压断路器选型。

  关键词：直流低压配电系统；接地类型；电压等级；故障类型；低压断路器选型；过载保护；接地故障保护；断路器串联接线

     中图分类号：TU852                文献标识码：A

      doi：10. 3969 / j. issn. 1003 - 8493. 2019. 07. 005