某铅锌选矿厂低压出线回路小截面电缆热稳定校验

Thermal stability test of low-voltage outlet circuit small-section cable in a lead-zinc concentrator

某铅锌选矿厂采用母干线式配电系统,基于短路电流热效应的原理,通过对低压配电系统的短路电流的计算,以及低压配电系统采用限流断路器对短路能量的限制,对低压配电系统小截面出线电缆进行热稳定校验计算,分析设计中如何保证大容量变压器低压侧小截面出线电缆满足电缆热稳定的要求。

A lead-zinc concentrator adopts trunk line power distribution system,based on the principle of short-circuit current thermal effect,through the calculation of short-circuit current of low-voltage power distribution system,and the limitation of short-circuit energy by low-voltage power distribution system using current-limiting circuit breaker,thermal stability check calculation of small-section outgoing cable of low-voltage power distribution system.This paper analyzes how to ensure that the low-voltage side small-section outgoing cable of large-capacity transformer meets the requirements of cable thermal stability.