我有一台800KVAR的变压器,最大的一台电机是500KW,请问一下有经验的师傅能否用星三角启动,用多大的接触

电机是380V
2025-03-30 05:35:56
推荐回答(4个)
回答1:

你好!很高兴为你解答
采用星三角启动时,启动电流只是原来按三角形接法直接起动时的1/3。如果直接起动时的起动电流以4~7Ie计,则在星三角起动时,起动电流才2~2.3倍。同时启动电压也只是为原来三角形接法直接启动时的根号三分之一。
变压器的容量800KVA 额定电流=800000/380=2105A 电机额定电流约等于1000A如果星角启动电流为2000——2300
几乎是没有余量的所以不能用星三角启动!
建议你采用软启动,如果想要节省资金也可以采用自耦降压启动
希望采纳!
电源支持小组队员为你解答

回答2:

不敢不敢。。。。就哪怕星角。。。也是要超。。。怕是拖不动。。。还是用软启动器吧。。。。
负载不大而且不常启动的话。。。可以勉强拖得动。。。不过还是有点费劲。。。。小心为妙。。。。

回答3:

变压器容量不足以满足电机的星三角启动。

回答4:

电动机太大了,星角启动不行,建议使用软启动器最合适!

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