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Mobile connector at 230v, 28mi/hr? voltage drop or normal?
- Thread starter ezevphl
- Start date
Yes. It is in a neighbor's yard so I can't easily get to the labeled side. He checked it out and it was only 25 kW!
eprosenx
Active Member
Yup.
Many utilities are not ready for electric vehicles. In places with all gas heating and cooking and not much Air Conditioning, there is not very high loads from houses. Having a number of houses on a single 25kW transformer is not uncommon. As @Cosmacelf mentioned, the utilities often run them beyond their nameplate. I really don't know how far you can push them. I am lucky that I am on a 75kW transformer that like 10-12 houses share (all with natural gas heat). My voltage stability is great.
juliusa
Active Member
Can't really tell how many kW the transformer that feeds my house is. Seems the distribution feed is 13,800V. I'm guessing the 200 in the catalog number is 200kVA. There are 4 houses, and each has 400amp service.
eprosenx
Active Member
eprosenx
Active Member
juliusa
Active Member
Could be - but running it at 8x rated??
Whatever it is, I don't get voltage sag when I charge my car at 19kW.
eprosenx
Active Member
Most houses use a *tiny* fraction of the actual service rating and the utility knows this. Fun fact: The power company does not have to comply with NEC. They can do anything they want basically. I am not sure I have seen a transformer of that style ever that was over 75kW. Typically over that they are three phase transformers, etc...
That’s not how ratings work. You might have a 400A panel, but you never get close to using that capacity. Average 4 houses together and that allows the utility company to put in a smaller transformer.
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