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南昌钢铁厂4号(10 t)电炉原采用的水冷电缆为单股的,单根截面只有500mm~2,流过短网的电流为12 KA,因此三相共需要24根水冷电缆,从而使短网布置和结构复杂化,每单根电缆由于接触各异且因邻近效应及集肤效应影响,使电缆中电流分布不均匀,使线路损耗增大。由于流过短网电流大,经常发生冲击性短路电流,使水冷电缆抖动厉害,接触处容易松动,更加重了其余电缆的负荷,增加了接触
Nanchang Iron and Steel Plant on the 4th (10 t) electric water heater used in the original single-water-cooled cable, a single cross-section of only 500mm ~ 2, through a short network current of 12KA, so a total of 24 three water-cooled cable so that Short mesh layout and structure of the complex, each single cable due to contact with different and due to the proximity effect and the skin effect, the current distribution in the cable uneven, so that line loss increases. Due to the large current flowing through the short-circuit, the impact short-circuit current often occurs, so water-cooled cable jitter powerful contact easily loose, more emphasis on the rest of the cable load, increased contact