I remember my first OT callout to a substation. The utility claimed to be finished repairing our 12.6KV AC1 line. I called our Power Controller and stood clear as I asked him to close the AC breaker. KABOOM! Once my pulse settled, I asked him to open the AC Bus Tie and try closing AC1 again. There weren't any loud noises that time. Since each AC bus has its own 120/208Y aux transformer, I went to an ATS fed by both for answers. I measured A to A, B to B, and C to C, not expecting any value, just that they should all be about the same. They weren't. The next step was to jog a compressor fed by a panel off of that ATS, transfer, and jog again. Seeing the pulley rotating the wrong direction was the final proof I needed to call the LD (Load Dispatcher) and ask him to please have the lines switched back the way they were. As a new guy, I wanted to be really sure before I told the utility that they had things a tad backwards.
Joe
