Re: Effect of Sag or undervoltage in Motors
Hello poweringtech-
For Carl and Charles, CBEMA changed their name recently to the Information Technology Industry Council, and I believe that their web site is
www.ITIC.org. The CBEMA (now ITIC) curve is available for free download if you would like more information. Click on "reports".
poweringtech, I did a power quality study for the Department of Transportation recording and looking at the effects of voltage sags. Almost 47% of all equipment failures could be attributed directly to sags, including damage to several pan/tilt motor bases for traffic cameras. We did not look at motors with any real horsepower, but I suspect that most can safely handle the typical sag, which is just a few cycles in duration.
Undevoltages, if low enough, can cause overheating of motors and transformers and might be of greater concern.
If you PM me, I'll send a copy of our paper.
Thanks!
Mark