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铝合金线槽温升与什么有关?

1、保温材料及壳体结构散热较差,结构工艺较好。绝缘材料散热良好的母线槽导线,按设计手册或电工手册折价后,可满足载流要求。然而,一些产品的绝缘材料是树脂浇铸,或其他散热不良的绝缘材料、空气母线结构和散热不良的密集母线结构将有更多折扣。一些产品的结构和绝缘材料的散热性很差。导体是根据电工手册中的环境温度30℃来选择的,这会误导用户。据了解,其中一些产品只能达到当前拦截容量的60%~70%,给我国电力供应造成严重的安全隐患和巨大的电力损失,值得关注。

2、对于部分超负荷运行的项目,负荷随着设备的增加而增加,或原设计的母线不能满足现场需要。部分工程在施工和订货时采用变容段变容,未采取有效的保护措施。过载运行时,温度升高,变容后开始的开关不能保证变容后小电流的过载,存在安全隐患。


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