好吧问答库 > 5500W单相电机和1500w三相电机那个力大?

5500W单相电机和1500w三相电机那个力大?

2025年04月06日 16:44
有1个网友回答
网友（1）：

100A空气开关正常情况下都是三相的, 因此电压为0.38KV，负载功率最大值为：
100x0.38x1.732=66kw>5500w
因此，当电机功率小于66kw时，都可以使用。但是由于负荷启动冲击电流较大，建议用到计算功率的87%即57.4kw就好。
选用空气开关一般是按用电器电流的1.2倍选择即可。比如220V电压时，某电器功率为5000W，计算电流为23A左右，则23A×1.2倍=27.6A，选择标准系列30A空开即可。

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