Electrical theory question...
Let's take as an example 50AMP RV service. A voltmeter between the two hots shows 240 volts, between one leg (or the other) and neutral shows 120 volts. My question concerns what happens when each...
Forum Discussion
MEXICOWANDERER wrote:
Good graphics RoyB!
MyRedRacer
A WYE connected 3-phase service drop transformer with different L0 to Lphase potential? I don't thing so...
. Down here four wire high volA DELTA transformer with mid-phase neutral tap is the norm in the USAtage 3-phase transformers are the norm. Wye connected transformers.
Delta transformers with 120 volt service on two phases offer 277 and 208 volt service.
I've designed countless dozens of unit substations, in my days as a consulting engineer, with 25KV delta primaries and 120/208V & 347/600V wye connected secondaries (mostly with grounded wye neutral, but not all) and have not heard of the configuration you mention as being the standard in the US.
This is what the Mike Holt electrical forum has to say on your transformer connections. link
