Control Gent's,
I hope this message finds you all well.
We have replaced the packing of the Generator Bearing by a standard one supplied by OEM. We tried to start-up the turbine 3 times and it tripped due to high vibration on generator DE and NDE. It seems that the packing is tight or not installed well. Every time, turbine trips on higher speed (3,500 - 3,900 - 4,100 / rated speed is 5,100 rpm).
Can anyone share the right procedure for packing replacement ? and what is the recommendation for start-up trials ?
Generator is 25MW Holec Generator driven by GE Frame 5
Bearing is RENK EMXLB 28-335
Thank you in advance.
I hope this message finds you all well.
We have replaced the packing of the Generator Bearing by a standard one supplied by OEM. We tried to start-up the turbine 3 times and it tripped due to high vibration on generator DE and NDE. It seems that the packing is tight or not installed well. Every time, turbine trips on higher speed (3,500 - 3,900 - 4,100 / rated speed is 5,100 rpm).
Can anyone share the right procedure for packing replacement ? and what is the recommendation for start-up trials ?
Generator is 25MW Holec Generator driven by GE Frame 5
Bearing is RENK EMXLB 28-335
Thank you in advance.