YE4

 The performance of this series of motors meets the requirements of IEC72 and GB755. The energy efficiency level meets the IEC60034-30IE4 level.
 The cooling method of this series of motors adopts IC411 or IC416
 The installation method of this series of motors can be made into IMB3, IMB35, IMV1, IMV5 and other methods.
 The rated voltage of this series of motors can be made into 380V, 660V, 1140V. The rated frequency can be made into 50Hz and 60Hz, and the frequency can also be made into 5-60Hz.
 The protection level of this series of motors is IP55, and it can also be made into IP56, IP65, IP66. According to the place of use, it can be made into outdoor (W), mixed tropical zone (TH), outdoor humid tropical zone (WTH), anti-corrosion type (F1, F2), outdoor anti-corrosion type (WF1, WF2), etc.

 This series of motors adopts high-strength cast iron base, vertical and horizontal heat dissipation rib structure, resin sand molding process, the motor has beautiful appearance and high mechanical strength. The motor uses high-quality low-loss silicon steel sheets to make the stator and rotor cores, and uses high-insulation electromagnetic wires. After vacuum pressure (VPI) varnishing, the winding stator has good electrical and insulation properties.
 The ventilation and heat dissipation structure of this series of motors is divided into internal and external wind paths. The internal wind path circulates the internal heat of the motor through the internal fan and rotor blades to the heat dissipation duct and heat dissipation ribs on the motor base, and then the heat on the base shell is dissipated through the external fan on the external wind path, effectively controlling the temperature rise of the motor and improving the reliability of the motor operation.

 The rotor of this series of motors adopts cast aluminum or copper bar structure, and the dynamic balance accuracy of the rotor is assessed according to G1.0 level. The motor has a small vibration value and runs smoothly. The external fan structure of this series of motors adopts axial flow fans and backward-inclined centrifugal fans, which ensures effective heat dissipation of the motor and reduces the ventilation noise of the motor.
 The processing and manufacturing of the parts of this series of motors adopts advanced process methods and high-precision processing equipment to achieve the best processing accuracy of the motor parts and ensure that the clearance of each part reaches the ideal state when the motor is assembled. The motor bearings are from well-known domestic and foreign brands, and reliable shaft current blocking measures are adopted for variable frequency motors to ensure that the lubricating oil film will not fail when the motor bearings are running, which increases the service life of the bearings and makes the operation of this series of motors more reliable.