简要说明：西门子软启动器3RW系列可以限制起动电流和起动转矩，有效防止机械冲击以及电网电压降。通过相位控制降低电机电压，并能够在可调起动时间内将电机电压增加到电网电压。软起动和软停车可以保证连接设备上的应力最小

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