Issues in Verification of Thermal Stability of Low-voltage Short Circuit in Implemention

Li Hanguo（Shenzhen Municipal Design & Research Institute Co.，Ltd.，Shenzhen 518029，Guangdong Province，China）

 

    Abstract It is explained that discrepancy will be generated in the practice of interpreting “ I ” in the formula as effective value of short-circuit current without taking protective action of circuit breaker into consideration in the process of verification of thermal stability of low-voltage short-circuit current.

    Key words Short-circuit current Verification of short-circuit    thermal    stability        Circuit    breaker Let-through energy

 

    摘 要 阐述在低压短路电流热稳定校验过程中，将公式中的 I 理解为短路电流有效值，而不考虑断路器的保护作用的作法是有偏差的。

    关键词 短路电流 短路热稳定校验 断路器 允通能量