This is a difference motor than the one updated on https://www.eng-tips.com/viewthread.cfm?qid=482813. Completely different Feed Mill this happened at.
thread237-329180
Coming back to this thread referenced above. The motor has been running for 9 years now and has not failed since fixing the vibration problem.
https://res.cloudinary.com/engineering-com/video/upload/v1620226761/tips/MOV_3115_ssnguk.mov
400 HP Hammermill Motor. As shown on the attached video, motor amps fluctuating rapidly 200 amps within a second. I replaced the soft start, problem still existed. I replaced the motor, problem still...
I have 8 Schneider VFD panels that have a bypass with overload protection built in. On 60 hz, the panel works as it should. But, when I turn it down to 30 hz, the overload relay trips within a couple minutes. What is causing this? It is an electronic overload. It is doing this on all 8 panels.
Motor shop confirmed, after going through the motor, that the losses were contributed by vibration. I will not be certain that this fixes the problem until after a year of running the new motor because failure usually occurs 10-12 months from installation. I am pretty confident this fixes the...
It is a TEFC motor. It uses a inside the delta connection. It uses a soft start to ramp up then switches to bypass contractors.
UPDATE: I did a vibration analysis on the machine, and the result was the base was flexing and that the anchor system was not Sufficient. After reanchoring and...
Motor is cleaned atleast once a day to remove buildup. I did a thermal study on this motor and the temperature of the exterior of the motor never got above 105 degrees.
I have a 400 hp motor on a hammermill that has failed every year for the past seven years.
The motor is equipped with a telamecanique altistart 48 soft start and is 3 phase 480 volt. This hammermill is used to grind corn for a feed mill.
When the motors are taken to a motor shop, it always...
