... 500 air cooler fan,500 cooler motor YWF4E-500 air cooler axial motor fan ,air cooler motor fan ,500 air cooler fan,500 ... conditioning and heater, etc.3. The insulation class of motor is B or F, and the protection class of that is IP44 ... of operation: Continuous operation (S1)—Bearings: Maintenance- free ball bearings—Motor protection:Design with thermal overload protector—Cable exit: variable—Protection ...