Thanks to all who posted for the information provided. I am currently weighing my options.
While I do like the idea of the wye-delta transformer suggested by davidbeach and others, I have also looked into the grounding transformer and resistor package units from several manufacturers. They...
Thanks for the posts they are very helpful.
I would prefer to go with a grounded neutral setup but I thought that corner grounding would be a quick easy and inexpensive way to solve the problem. Also, none of the electrical suppliers that we use had ever heard of a zig-zag transformer, so I...
We recently had a costly incident in our mill that resulted in the destruction of 6 VFDs. These drives are in a section of the mill that is supplied by a transformer with a ungrounded 480 V delta secondary. It appears that the damage resulted from over voltages created by an intermittent...
