scameron81
Member
I one did a plant near San Francisco. When I got on site the contractor complained that nothing would run because none of his fourteen solid-state starters worked! I read the error code on the starters. (Him- "Is that what those blinking lights are?"). You guessed it - phase rotation. I had to swap connections on one blower to prove it to him. Swapped the main transformer and all was good.
Then I had to convince him he had to swap back my test motor. Sigh.
PG&E’s system phase rotation is ACB for whatever reason so most of the state of California is backwards from what people are generally accustomed to. I’m not sure how many people are aware of that. I only know from working in power plants where phasing had to match perfectly. It could be a real pain at times.