西门子6RA28系列直流调速系统型号电流电压描述6RA2818-6DS2130A380V单象限,不可逆6RA2825-6DS2160A380V单象限,不可逆6RA2828-6DS2190A380V单象限,不可逆6RA2831-6DS21125A380V单象限,不可逆6RA2875-6DS21200A380V单象限,不可逆6RA2877-6DS21250A380V单象限,不可逆6RA2881-6DS21400A380V单象限,不可逆6RA2885-6DS21600A380V单象限,不可逆6RA2818-6DV6130A380V四象限,可逆6RA2825-6DV6160A380V四象限,可逆6RA2830-6DV61100A380V四象限,可逆6RA2832-6DV61140A380V四象限,可逆6RA2875-6DV61200A380V四象限,可逆6RA2877-6DV61250A380V四象限,可逆6RA2881-6DV61400A380V四象限,可逆6RA2885-6DV61600A380V四象限,可逆)