What are the regulations on motor operation and matters needing attention?

(1) motor under the condition of rated cooling,according to the rated data stipulated in the factory brand of the running,do not allow the limitation of ambiguous motor run blindly.(2) the motor coil and iron core of maximum monitoring temperature should be according to the provisions of the factory,such as the factory did not make clear a regulation should be according to the provisions of the table below,the motor runs in any circumstance should not exceed the temperature rise.Insulation class A grade B E F,resistance thermometer resistance thermometer resistance thermometer measurement method,static son 220v electric motor winding temperature rise of the temperature rise of 506060757080,8595100110105115,static iron core temperature,607580,95100115,the above-mentioned numerical temperature when the environment temperature of 35 ℃ (3) allows the temperature of the motor bearings,should abide by the provisions of the factory.No manufacturing rules,according to the following provisions: A,for the sliding bearing,shall not exceed 80 ℃.B,for rolling bearing,shall not exceed 100 ℃ (poor quality of oils and fats,do not exceed 85 ℃) 

(4) motor can be changed at rated voltage general-5% to + 10% within the scope of operation,its rating unchanged.(5) the motor run in rating,and voltage unbalance rate shall not be greater than 5%,the difference of three phase current shall not be greater than 10%.(6) the motor is running,in each bearing measured vibration shall not exceed the provisions of the table below: motor speed vibration value (double amplitude) mm,3000 rpm0.05,1500 rpm0.085,1000 rpm0.10,750 RPM and below 0.12 Motor in the process of running in addition to the strict rules,should also pay attention to the following questions: (1) the current of the motor under normal circumstances should not exceed allowable values,the difference between the three phase current shall not be greater than 10%.(2) sound and smell: motor start capacitor during normal operation of the sound should be IE2/IE3 electric motor uniform normal,no noise;No coke smell or smoke near the motor,if found to have different sounds,measures should be taken to processing coke smell or smoke.(3) the performance of the bearing,mainly is the lubrication situation,lubricating oil is normal,the temperature is high,whether there is sundry.(4) other situations,such as cooling www.dongfeng-

motor.com water system is normal,wound rotor motor brush on the slip ring is normal

operation.