李 林（中机中联工程有限公司，重庆市 400039）

Thermal Stability Verification for Cables

LI Lin(CMCU Engineering Co.,Ltd.,Chongqing 400039，China)

Abstract：In view of the importance of conductor thermal stability verification in the design stage,several methods for thermal stability verification of low‑voltage cables using circuit breakers and fuses for protection are summarized,the location selection of short‑circuit points is discussed,and the author’s views are put forward.

Key words：low‑voltage cable;thermal stability verification;circuit breaker;fuse;short circuit point location;short‑circuit current;let‑through energy curve;duration of short circuit

摘　要：针对设计阶段导体热稳定校验的重要性，总结低压电缆采用断路器和熔断器保护时热稳定校验的几种方法，并就短路点的位置选取进行探讨并提出作者的看法。

关键词：低压电缆；热稳定校验；断路器；熔断器；短路点位置；短路电流；允通能量曲线；短路持续时间

中图分类号：TM247                　  文献标识码：A

doi：10.3969 / j. issn.1003 － 8493.2024.06.012