ptonsparky
Tom
- Occupation
- EC - retired
I was in a large Dairy a couple weeks ago pretending I knew something. Local POCO is doing a PQ check .
One of the things I did not like was the VFD controlling a vacum pump motor. Noticable variation in rpm ever second or two. In the hundreds.
This may or may not have influence on PQ, but how tough is this on the motor?
One of the things I did not like was the VFD controlling a vacum pump motor. Noticable variation in rpm ever second or two. In the hundreds.
This may or may not have influence on PQ, but how tough is this on the motor?