下图所示网络中，f点发生三相短路时，关于短路点右侧网络中的电流正确的说法是（）。<imgsrc="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205075635_277.png"alt=""/>

【单选题】【消耗次数：1】

① 不存在电流

② 过渡过程中存在电流

③ 电流始终存在

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