DB3-AA0.2,DB3-AA2,DB3-AA5,DB3-AA20,DB3-AA50,DB3-AA100,DB3-AA150,DB3-AA200,交流电流测量 DB3I-AA0.2,DB3I-AA2,DB3I-AA5,DB3I-AA20,DB3I-AA50,DB3I-AA100,DB3I-AA150,DB3I-AA200,