李先进 何   敏 钟世洪（中国建筑西南设计研究院有限公司，成都市 610042）

高压负荷开关 - 熔断器组合电器的保护配合（李先进   何敏   钟世洪）

Protection Coordination of the Transformer by HV Load Switch‑fuse Combination Unit

LI Xianjin HE Min ZHONG Shihong

（China Southwest Architectural Design and Research Institute Corp. Ltd.，Chengdu 610042，China）

    Abstract：In this paper，the operating principle and selection principle of HV load switch‑fuse combination unit are introduced， and the protection coordination principle between HV load switch‑fuse combination unit and LV outlet circuit breaker is analyzed. Whether the selective coordination requirements are met between HV fuse and LV circuit breaker recommended by the product sample is illustrated with examples，and selection table of HV fuses considering protection coordination is given.

    Key words：HV load switch;fuse;combination unit;LV circuit breaker;protection coordination;acting characteristics;operating principle;selection principle

  摘　要：介绍高压负荷开关-熔断器组合电器的工作原理及选用原则，分析高压负荷开关-熔断器组合电器与低压侧出线断路器之间的保护配合原则。结合实例说明产品样本推荐的高压熔断器与低压断路器之间是否满足选择性配合要求，给出考虑保护配合的高压熔断器选择表。

  关键词：高压负荷开关；熔断器；组合电器;低压断路器;保护配合;动作特性；工作原理；选用原则

  中图分类号：TU852　　　　  　文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2020.09.010