We have vertical multistage pump driven by electric motor on the combined cycle power plant.
Motor details are: 4 poles, 1482 rpm, 300 KW, 50 Hz AC motor.
During our routine condition monitoring, we are detected sound coming from the motor. We are taken vibration measuring, the amplitude at the motor 1.58 mm/s rms 1RH.
I 'm truly need someone who help me to explain well this issue.
you find attached some spectrum FFT's velocity and acceleration, knowing that I don’t know the number of rotor bars. I suspect that we have a problem of out magnetic center.
thx for all