Blower Motor Failure

Is the motor failure electrical ,such as grounded stator, or mechanical such as bearings?

Are you balancing the blower or motor or are they combined?

What is the Amperage during operation and what is the stated full load amps?

What type of drive is between the motor and blower?

.....and what is the overload preotection device's trip current setting?

You said very little about your motor; that is why I think you are not an electrician. The motor will usually burn because of overload. You better ask an electrician to do this job because 550 kW motor is not the cheapest one. Just measure the currents on all three phases (they should be the same). I do not know what current is the maximum for it depends on the voltage you use, but it should be written on the plate. Make sure that the measured current does not exceed the nominal. If it does, just stop the motor. Next step: consider the volume of air you need to blow. If you do not need so much air, use VFD (Variable Frequency Drive) to lessen the speed of motor; you might not need much to give away (the load will decrease in square proportion relatively to the speed). If you really need that amount of air, you might need a bigger motor. Calculate the power you need for that amount of air and put of the same power or little bit bigger motor. Good luck!

Check the votage feed to the motor low votage can burn up motors this can happen if there a heavy load on the system or on the grid we hade same problem on a blower motor at a wastewater plant . check votage at different times we found out that there was a heavy load on the grid in the late afternoon causing our votage to drop there went the motor we lost about five 10 hp motors before we found the broblem hope this help Tom