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This is what I was thinking: 1)Measure existing site phase rotation using rotation meter that will tell us if the rotation is CW or CCW. CW denotes R, W, B, R, W, B.... CCW denotes R, B, W, R, B, W... 2)The new transformer has the intended phase rotation direction marked on the nameplate, it shows: R, B, W, R, B, W...
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