I want to ask about efficiency and economy of electric power distribution in USA.
I live in Europe and American standards are so weird for me. I was very surprised when I saw this:
Question 1: Every house has separate transformer? 7.2kV overhead transmission lines are present over all streets at small towns and villages? Seriously?
Here where I live - we have 230V and few hundreds of houses are powered from single 3-phase 15000/230V or 30000/230V transformer. Transformers like this have 99% or similar efficiency.
Im sure, that smaller transformer (like American household transformer) wastes much more power, and in addition output voltage is less stable than voltage from high power transformer. By less stable I mean voltage changes with load changes.
Question 2: Is "American standard" much less efficient than European?
I was wondering if 400kVA transformer is cheaper than 20 20kVA household transformers. Other thing is 7.2kV lines everywhere - they need bigger insulators (more expensive).
Question 3: Is "American standard" less cost efficient than European?