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【单选题】
用三相电流测试仪在C测试RCS978E型变压器比率差动保护特性时,星形(Yn0)侧的接线方法应是( )
A.
使电流从C极性端流入,从C极性端流出后回到测试仪In。
B.
使电流从C极性端流入,从A极性端流出后回到测试仪In。
C.
使电流从C极性端流入,从B极性端流出后回到测试仪In。
D.
使电流从C极性端流入,从B极性端流出后回到测试仪In。
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