Liteyear, How do you go about swapping polarity as you've suggested? We have a 3 phase Y power system and we don't understand how to implement your suggestions. Are you saying to go into the lighting ballast and swapping the DC leads? We dont even know if we can do that. Thank you for your...
Thank you all so much for your questions and assistance in the Power Quality problem; We have identified the source of the 120 hertz current.....when reviewing current spectrums as compared from one phase to another, we noticed that the 2nd order current was only in elevated levels on two of...
I apologize dpc and mark1080, I answered your questions backwards. The first reply should be to mark and the second to dpc. Sorry about that. Thanks again.
Hey Dpc - The service entrance transformer is a Wye – Grounded Wye winding configuration. The load bus is commercial facility, nothing out of the ordinary. One hint is that we only see elevated levels of the 2nd harmonic current on two of the three phases; with an average of 8% Distortion...
Does anyone know what could produce 120 hz current on two legs of a 3 phase system? (120 hz is being produced on a and b phase, not c) We know that it's not a drive misfiring and we know it isn't a transformer saturating. Any input would be so much appreciated!!
Thanks, Ashley
