At a neighboring utility we discovered a very unique connection on a three phase O/H bank. The coneection was open wye-open delta one two single bushing pots. The secondary had 480v L-L with one leg split to get 240v. The oddity came where the one leg was slipt was get 240, the utility also...
Our utility has been asked by the public transit system to bond our grounded system neutral, which is an AC system, to their grounding grid with serves as a ground for both of their AC and DC equipment. What are the concerns for stray DC current flowing though our AC system?
