【判断题】
在铁心内部产生的环流称为涡流，涡流所消耗的电功率，称为涡流损耗
A. 对
B. 错
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答案
B
解析
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【判断题】
极限开断电流。是指当断路器的运行电压低于额定电压时，断路器的允许开断电流可以超过额定开断电流。但它不是按电压降低成比例的无限增加，它有一个由断路器的灭弧能力和承受内部气体压力的机械强度所决定的极限值，这一极限值称为极限开断电流
A. 对
B. 错
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