... ,50/60Hz 4,Cooling method: IC411 Features of YB2 series explosion-proof motor of three-phase asynchronous:high efficiency,large torque moment ... ,reliable operation and good appearance.There are different models of explosion-proof motor:Exd I ,Exd II AT4 and Exd II BT4 ... class:IP55Cooling method :IC411Work mode:S1Insulation class:F YB2 series explosion-proof electric motor coal mining machinery parts