Features of Hiller YE3 series Frame material: cast iron. Standard color: Gentian blue(RAL 5010) Rated output power: 0.75kW~315kW at 50Hz Available in 2,4,6pole motor(0.75kW and up)with efficiency grade 2. according to GB18613-2012 and efficiency class IE3(50Hz) according to IEC 60034-30. Standard mounting construction according to IEC 60034-7:IMB3，IMB5，IMB35 and etc. All motors are designed to IP55 degree of protection (IEC 60034-5).Insulation system is designed for temperature class 155(F). At rated output with line-fed operation,the motors can be used in temperature class 130(B). Self ventilated motors with radial-flow fans (cooling method IC 411 according to IEC 60034-6) as standard,forces air cool with external separately driven fans as option. Degrees of motor protection IP55 (IEC 60034-5). Altitude of working environment shall not exceed 1000m above sea-level (IEC 60034-1).