余弦型功率方向继电器的转矩公式为MAC=kUjIjCOS(鳿Dj+45),则继电器动 发布时间:2017-09-19 23:50 │ 来源:www.tikuol.com 题型:单项选择题 问题: 余弦型功率方向继电器的转矩公式为MAC=kUjIjCOS(鳿Dj+45),则继电器动作最灵敏的角度应为()。A.+45°B.-45°C.0°
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