【简答题】
简述 CRH380A 型动车组 APU3 的
构成？
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答案
APU3 由输入充电电路（K2、R1），单相输入变压器（T1），单相输入脉冲整流器、三相输出逆
变器、正弦波滤波器（FLT1）、输出接触器（K4）以及转换接触器（BKK2）等构成。"
解析
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