The operation of the three-phase asynchronous motor monitoring

Three-phase asynchronous motor running monitoring:1,monitoring,motor overheating 2,monitoring the working current of the motor is more than the rated current 3,monitor power supply voltage with or without changes 4,monitor whether the three-phase power supply voltage and current balance Note: in the operation of the three-phase asynchronous motor 1,pay attention to the ventilation of the motor and the environment 2,pay attention to the motor vibration 3,pay attention to the noise of the motor with or without abnormal situation 4,pay attention to whether motor abnormal smells 5,pay attention to the working condition and fever motor bearing Daily monitoring master electrician motor five often:1,often listen to.Motor issue during normal working uniform "buzzing" sound.Particularly heavy when I heard the "buzzing" sound,or "utter the word" sound,motor open phase running.

If heard a continuous "guru" or "giggle" sound,that there is something wrong with the motor bearings 2,often

have a look.See the ammeter or a voltmeter indicates whether or not the normal;See if three phase

current balance;See whether the power supply voltage of three-phase;See Motor

vehicle if motor on the basis of solid,etc.3,often monitoring environment temperature.The output power of the motor temperature has a great relationship with the surrounding environment,the

environment temperature is higher,the smaller the motor output power.When the environment temperature below 35 ℃,motor power output will be greater than the rated power output,the increase of amplitude of (35) % (t for the actual environment temperature),but not more than 8% - 10%;When the environment temperature above 35 ℃,the output power of the motor than rated output power reduction (t - 35) %.4,often feel.Back with your fingers touch the motor shell,temperature rise is too high.As the hot

hand,motor has overheating.5,often smell.Whether with his nose close to the motor,smell the smell of

insulating varnish or anxious burnt flavour.If have,diesel generating set could be the result of a coil of motor overheating and short circuit,etc.