Historically we used to own what is now TSO grid (Transmission lines and primary stations) because of this we have had TSO grid available in our GIS system (geometric network)
When moving to UN we do not want to have all this data in the network (it is not updated, and we do not need a subnetwork for TSO grid at the moment, looking forward this could be updated via a cim file from TSO but we are not there for at least 5-10 years?)
Typical in the TSO-DSO transition the transformer (is owned 50/50
Where there is input from a power producer, they often own a MV cable that feeds into one of our secondary substation. At this point there is a meter. (That we often miss in our grid today)
