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上海重型机器厂230t电弧炉供电短网改用大截面水冷电缆,经过一年运行,尚未发生因水冷电缆故障而造成停产的情况,深受维修工人的好评,并取得可观的经济效益。 我厂2电炉变压器容量为15000kVA,额定电流为24000A,原供电短网采用500mm~2裸铜绞线,每相16根,长为9m,总截面为8000mm~2,电流密度为3A/mm~2,每米重9.4kg,每吨裸铜绞线为3.5万元,每根电缆需用2个铜接头,每个按750元计,即每相电缆需:
Shanghai Heavy Machinery Plant 230t EAF power supply short-span switch to short-section water-cooled cable, after a year of operation, has not yet occurred due to water-cooled cable failure caused by the shutdown of maintenance workers by the praise, and achieved considerable economic benefits. I plant 2 electric furnace transformer capacity of 15000kVA, rated current of 24000A, the original power supply short-circuit using bare copper wire 500mm ~ 2, 16 per phase, length 9m, the total cross-section of 8000mm ~ 2, the current density of 3A / mm ~ 2, 9.4kg per meter, bare copper strand per tonne 35,000 yuan, each cable need to use two copper joints, each at 750 dollars, that is, each phase of the cable to be: