This is a scary situation, but surely after all these years design flaws would have surfaced by now. So bearing this in mind there has to be a fault somewhere. Maybe the same equipment elsewhere is good place to test this theory. The only Westinghouse print I've seen, shows a closed loop circuit apart from direction contactors going through the rototrol circuits. If there was a main contactor in series with the motor and generator armature loop circuit this movement wouldn't occur unless this relay has a proper supply to it.