StephenSDH
Senior Member
- Location
- Allentown, PA
Well this is a follow up to my first post on this forum. It is another money saving gizmo. It seems to be a Capacitor Back with a line reactor for a large industrial system.
http://forums.mikeholt.com/showthread.php?t=110653
After the helpful responses to reassure my beliefs, I advised the customer it was fishy an there wouldn't be a grandiose payback. He went ahead and installed the system, along with Squard D PowerLogic monitoring system with data collection. Long story short. The customer said the system has reduced his KW, and he has been given pats on the back from Upper Management. Only issue he mentioned is he permanently turned off one of the systems because when it is unloaded one of his boilers tripped out on overvoltage. I do believe him that they shaved off some KW, but I also believe they are going to have issues over the years from adding capacitors to their system(Drive Failures, Capacitor Failures). I tip toe on this subject, because I am not knowledgeable in harmonic power losses or System Resonance.
Can anyone point me in the direction of information to read about this subject? I have read alot about harmonics and power factor corrections, but I am unable to determine were the power savings is. The customer has primary Motor loads 50% drives, 50% across the line. My understanding is that he would likely predominately 5th and 7th harmonics. He told me the sales man said he would save by removing harmonics in the line which would reduce harmonic losses in motor windings.
I am thinking about volunteering a day of my time to go on site and get some experience with some of my toys by analyzing the harmonics, looking at what this company actually supplied, and try to find out why they are having overvoltage issues.
Thanks for any help. Sorry so long winded.
Steve
http://forums.mikeholt.com/showthread.php?t=110653
After the helpful responses to reassure my beliefs, I advised the customer it was fishy an there wouldn't be a grandiose payback. He went ahead and installed the system, along with Squard D PowerLogic monitoring system with data collection. Long story short. The customer said the system has reduced his KW, and he has been given pats on the back from Upper Management. Only issue he mentioned is he permanently turned off one of the systems because when it is unloaded one of his boilers tripped out on overvoltage. I do believe him that they shaved off some KW, but I also believe they are going to have issues over the years from adding capacitors to their system(Drive Failures, Capacitor Failures). I tip toe on this subject, because I am not knowledgeable in harmonic power losses or System Resonance.
Can anyone point me in the direction of information to read about this subject? I have read alot about harmonics and power factor corrections, but I am unable to determine were the power savings is. The customer has primary Motor loads 50% drives, 50% across the line. My understanding is that he would likely predominately 5th and 7th harmonics. He told me the sales man said he would save by removing harmonics in the line which would reduce harmonic losses in motor windings.
I am thinking about volunteering a day of my time to go on site and get some experience with some of my toys by analyzing the harmonics, looking at what this company actually supplied, and try to find out why they are having overvoltage issues.
Thanks for any help. Sorry so long winded.
Steve