I .General description
 Y series three-phase asynchronous motors are totally enclosed fan cooled three-phase general purpose motor. Mounting dimensions and rated outputs are conformed with IEC.
 Y series electric motor should be operated under the following condition.
Environment temperature below 40℃.
Altitude of the location less than 1000M.
Continuous working pattern (S1); B or F grade insulation; power frequency, voltage and connection method as described on the nameplate; limit temperature for stator winding 80K(B grade insulation) or winding 105K(F grade insulation)
IP44,IP54 or IP55 degree of protection; IC411 method of cooling.

II. Installation
1.Preparation before installation
(1). Check carefully whether three is any damage during transportation, and remove dust or anti-rusting layer on the electric motor before installation.
(2). Check all data on the nameplate of electric motor.
(3). Check components and parts and make sure they are complete and correctly fixed. The jutting-out axle must be flexible when rotated.
(4)Check and measure the insulation resistance of stator winding and see to it that it must be no less than 2mega-ohm. If not, stator winding must be dried below the temperature of 120℃.
2. Installation
The motor should be installed in the temperature of good ventilation and cooling condition. Avoid operating in over-heating or moist location.
The motor must be properly earthed. In the terminal box, there are earthing devices and symbols. If necessary, it can also be earthed with chassis and bottom screw of the motor.
(3)There are six binding post in terminal box, each marked with U1、V1、W1 and U2、V2、W2；W1、W2are the beginning and ending of three phase winding respectively. Connecting them with Y type or △ type as the connection method described on the nameplate of the motor.
(4)When the phase order ABC of main power are corresponding to the binding post marked with U1、V1、W1 respectively, the rotating direction of the motor is clockwise.
The motor without loading can test rotating direction when installed. The rotating  direction could be changed by changing the phase order of main power in case of need.
(5)When connecting the motor with coupling machine、belt pulley(air-blower wheel) or any other transmission components, cool-pressing or heat-sleeving method are recommended, while beating forcely with hammer is prohibited. Unload the wind
cover,  fix the end of the axle and install the rotating components if there are some difficulties in the methods above.
Otherwise, it will cause great damage to motor bearing, which leads to abnormal sound or far form normal operation.

III Operating
1.If the frequency and voltage of the main power is 1% and 5% deviated from the rated value respectively, then the rated output power of the motor can not be assured.
2.Continuous working under over-loading condition (electric current exceeding rated value) is strictly prohibited.
3.There should be no abnormal noise and vibration when the motor is working and the temperature of bearing should not exceed 95℃.