... 1140V,50/60Hz 4,Cooling method: IC411 Features of YB2 series explosion-proof motor of three-phase asynchronous:high efficiency,large torque moment ... running,reliable operation and good appearance.There are different models of explosion-proof motor:Exd I ,Exd II AT4 and Exd II ... :IP55Cooling method :IC411Work mode:S1Insulation class:F YB2 series explosion-proof electric motor coal mining machinery parts