... 2. IEC standard 3. Little vibration 4. Low noise MS series aluminum housing three-phase asynchronous motors, with latest design ... of selected quality materials and conform to the IEC standard. MS motors have good performance, safety and reliable operation, nice ... S1Insulation class: FProtection class: IP55Cooling method: IC411Bearing: SKF, NSK, NTN MS series three-phase aluminum housing motor