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I've been scratching my head about this one for months. I still can't seem to find a resource that explains how to solve this problem. Does anyone have any textbooks or other resources that explain how to solve this problem? Even the ncees solution doesn't make sense to me. I don't see how Leg...

Here's the problem: A 480v to 480/277v three phase transformer is connected delta-wye. A single phase load drawing 10A is connected to one line of the secondary. There are no other loads on the transformer. What are the primary winding currents? What are the primary line currents?