electric 3-phase motors Cancel The title field is required!

1. Parker Scott E

   
   12/19/2013 10:12 PM

   What is the average life expectancy of a 25,50,75,100 h.p motor. At my course I have 17 different motors from 5 h.p motors to 100 h.p. motors , 4 VFD drives and seems like we are always losing a motor. 3 of our motors are 25's that operate water features. We have been in operation 13 years.

   
   
   
   
2. Andy Jorgensen

   

   1 posts
   
   12/20/2013 5:12 AM

   I have six motors of various sizes. We typically have to rewind 1-2 a year. Fortunately, I have a few spares so it's a matter of getting our boom truck up to swap them out. For the ones I don't have spare of, my well contractor does, and will put his loaner motor on there while mine is getting rewound.
   
   Across the property, including our water and wastewater plants and our landscape pumps, we have about 40 motors. We typically have one out for service continuously throughout the year. Works good when the motor shop is dropping one off, they can pick up the next one or two!

   
   
   
   
3. Douglas Eggert

   

   1 posts
   
   12/20/2013 1:12 PM

   I have had to replace yet another 50hp 460V 3ph submersible motor this year. It had on it 1650 hours, ran like a champ until it decided to be a non-conformist in October... For this, a bill for $6350 again. It's a bad design from day one.
   
   This station, has had all it's motors(25,50,50) replaced at least 3 times in 18 seasons. Why would you use a submersible unless you had to? No rebuilds, not worth it in my case.
   
   We've paid more to fix the station than what it cost new... Still waiting for the second PLC to die.
   
   So for me 3-5 seasons is my guess. Last club I was at had motors 20 seasons old running great.

   
   
   
   
4. Keith Lamb

   

   3 posts
   
   12/20/2013 5:12 PM

   Had a old Newman 50hp motor go out earlier this year after approx. 26 years of service. Pump guy said they don't make them like that anymore...bigger bearings, thicker windings, etc... and suggested a rebuild. $4k and back in business. The 50 hp US Motor that was replaced 7 years ago burnt out a month later. Reinstates the previous point about not making them same anymore.

   
   
   
   
5. Henry Heinz

   

   0 posts
   
   12/21/2013 11:12 AM

   It really depends on a lot of different things. I always have my pumps checked for efficiency and perform amp draws on the motors each year. This can help prevent some failures, but there are those that will just randomly checkout on you. Also, when possible keep air moving around your motors to help keep them cooler. I spent days where I wasted away to nothing because it was so hot working in a pump house.
   
   
   Regards,