摘要
采用剥掉铠装层通以单相电流模拟三芯钢带铠装电缆通以三相电流,将敷设于电缆沟中的完整电缆段和剥掉铠装层电缆段串联加载不同的电流进行载流量试验,对比研究了两者的温度;根据电磁场理论,计算了载流量试验中的铠装损耗。按照IEC载流量计算标准,研究了铠装损耗对载流量影响的程度。研究表明,三芯铠装电缆加载单相电流时的铠装损耗不可忽略,但对载流量的影响不超过4%,且偏保守。
The current-carrying capacity of three-core cable with and without steel armour layed in cabletrench was tested through applying different single-phase current, and their temperature was compared.The loss induced by armour of the test cable was calculated according to electromagnetic field theory.The effect of loss induced by armour on the current-carrying capacity was studied according to IECstandard of current-carrying capacity. The results show that the loss induced by armour of the three-corecable can’t be neglected when applying single-phase current, and the current-carrying capacity decreasesby about 4%, which is acceptable.
出处
《绝缘材料》
CAS
北大核心
2014年第2期89-92,共4页
Insulating Materials
关键词
钢带铠装三芯电缆
单相电流
铠装损耗
载流量试验
three-core steel armoured cable
single-phase current
loss induced by armour
current-carryingcapacity experiment
